Supplying a building or house, their rooms and corridors, with fresh air. The controlling of the environment thus may be in public or domestic sites and in medical or non-medical locales. (From Dorland, 28th ed)
Any method of artificial breathing that employs mechanical or non-mechanical means to force the air into and out of the lungs. Artificial respiration or ventilation is used in individuals who have stopped breathing or have RESPIRATORY INSUFFICIENCY to increase their intake of oxygen (O2) and excretion of carbon dioxide (CO2).
The total volume of gas inspired or expired per unit of time, usually measured in liters per minute.
A plant genus of the family LILIACEAE that is a short plant with a distinct whorl of 3 broad leaves.
A naturally radioactive element with atomic symbol Rn, atomic number 86, and atomic weight 222. It is a member of the noble gas family found in soil, and is released during the decay of radium.
Ventilatory support system using frequencies from 60-900 cycles/min or more. Three types of systems have been distinguished on the basis of rates, volumes, and the system used. They are high frequency positive-pressure ventilation (HFPPV); HIGH-FREQUENCY JET VENTILATION; (HFJV); and high-frequency oscillation (HFO).
Permanent roads having a line of rails fixed to ties and laid to gage, usually on a leveled or graded ballasted roadbed and providing a track for freight cars, passenger cars, and other rolling stock. Cars are designed to be drawn by locomotives or sometimes propelled by self-contained motors. (From Webster's 3d) The concept includes the organizational and administrative aspects of railroads as well.
Short-lived radioactive decay products of radon that include 216-Po, 214-Pb, 214-Bi, and 214-Po. They have an effective half-life of about 30 minutes and are solids that can deposit on the bronchial airways during inhalation and exhalation. This results in exposure of the respiratory airways to alpha radiation and can lead to diseases of the respiratory system, including lung cancer. (From Casarett and Doull's Toxicology, 4th ed, p740)
An institute of the CENTERS FOR DISEASE CONTROL AND PREVENTION which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals.
Application of positive pressure to the inspiratory phase when the patient has an artificial airway in place and is connected to a ventilator.
The volume of air inspired or expired during each normal, quiet respiratory cycle. Common abbreviations are TV or V with subscript T.
A diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. These inorganic, organic, particulate, or vaporized matters usually are inhaled by workers in their occupational environment, leading to the various forms (ASBESTOSIS; BYSSINOSIS; and others). Similar air pollution can also have deleterious effects on the general population.
A method of mechanical ventilation in which pressure is maintained to increase the volume of gas remaining in the lungs at the end of expiration, thus reducing the shunting of blood through the lungs and improving gas exchange.
A diffuse parenchymal lung disease caused by accumulation of inhaled CARBON or coal dust. The disease can progress from asymptomatic anthracosis to massive lung fibrosis. This lung lesion usually occurs in coal MINERS, but can be seen in urban dwellers and tobacco smokers.
Respiratory support system used primarily with rates of about 100 to 200/min with volumes of from about one to three times predicted anatomic dead space. Used to treat respiratory failure and maintain ventilation under severe circumstances.
Techniques for administering artificial respiration without the need for INTRATRACHEAL INTUBATION.
Any of several burrowing rodents of the families MURIDAE and Bathyergidae, found in eastern Europe, Africa, and Asia. They have short limbs, small eyes with permanently closed lids, and no tail. Three genera SPALAX (Muridae), Heterocephalus (Bathyergidae) and Cryptomys (Bathyergidae) are used frequently as experimental animals in biomedical research. (From Walker's Mammals of the World, 6th ed)
Techniques for effecting the transition of the respiratory-failure patient from mechanical ventilation to spontaneous ventilation, while meeting the criteria that tidal volume be above a given threshold (greater than 5 ml/kg), respiratory frequency be below a given count (less than 30 breaths/min), and oxygen partial pressure be above a given threshold (PaO2 greater than 50mm Hg). Weaning studies focus on finding methods to monitor and predict the outcome of mechanical ventilator weaning as well as finding ventilatory support techniques which will facilitate successful weaning. Present methods include intermittent mandatory ventilation, intermittent positive pressure ventilation, and mandatory minute volume ventilation.
The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (= OXYGEN CONSUMPTION) or cell respiration (= CELL RESPIRATION).
Pulmonary or extrapulmonary infection caused by MYCOBACTERIUM TUBERCULOSIS or nontuberculous mycobacteria in a patient with silicosis.
The physical or mechanical action of the LUNGS; DIAPHRAGM; RIBS; and CHEST WALL during respiration. It includes airflow, lung volume, neural and reflex controls, mechanoreceptors, breathing patterns, etc.
Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)
Mechanical devices used to produce or assist pulmonary ventilation.
The exchange of OXYGEN and CARBON DIOXIDE between alveolar air and pulmonary capillary blood that occurs across the BLOOD-AIR BARRIER.
A monocot plant family of the Liliopsida class. It is classified by some in the Liliales order and some in the Asparagales order.
Circulation of water among various ecological systems, in various states, on, above, and below the surface of the earth.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
A plant genus of the family SOLANACEAE after which the compound SCOPOLAMINE HYDROBROMIDE got its name.
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
A clinical syndrome caused by heat stress, such as over-exertion in a hot environment or excessive exposure to sun. It is characterized by SWEATING, water (volume) depletion, salt depletion, cool clammy skin, NAUSEA, and HEADACHE.
A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions.
The ratio of alveolar ventilation to simultaneous alveolar capillary blood flow in any part of the lung. (Stedman, 25th ed)
A form of pneumoconiosis resulting from inhalation of dust containing crystalline form of SILICON DIOXIDE, usually in the form of quartz. Amorphous silica is relatively nontoxic.
A genus of blind, subterranean MOLE RATS, in the subfamily Spalacidae, family MURIDAE, used as a animal model in neurophysiology. There are at least five different species described, all found in the Ukraine.
A plant genus of the family LILIACEAE. This should not be confused with Broom or Scotch Broom (CYTISUS) or Desert Broom (BACCHARIS) or Spanish Broom (SPARTIUM) or Brome (BROMUS).
The usually underground portions of a plant that serve as support, store food, and through which water and mineral nutrients enter the plant. (From American Heritage Dictionary, 1982; Concise Dictionary of Biology, 1990)
Pollutants, present in air, which exhibit radioactivity.
A procedure involving placement of a tube into the trachea through the mouth or nose in order to provide a patient with oxygen and anesthesia.
The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.
A clinical manifestation of abnormal increase in the amount of carbon dioxide in arterial blood.
Liquid water present beneath the surface of the earth.
A genus of anaerobic bacteria in the family Peptococcaceae, widely distributed in SOIL and the RUMEN of animals. Stains gram-negative but cell wall is gram-positive type.
Uranium. A radioactive element of the actinide series of metals. It has an atomic symbol U, atomic number 92, and atomic weight 238.03. U-235 is used as the fissionable fuel in nuclear weapons and as fuel in nuclear power reactors.
The maintenance of certain aspects of the environment within a defined space to facilitate the function of that space; aspects controlled include air temperature and motion, radiant heat level, moisture, and concentration of pollutants such as dust, microorganisms, and gases. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A syndrome characterized by progressive life-threatening RESPIRATORY INSUFFICIENCY in the absence of known LUNG DISEASES, usually following a systemic insult such as surgery or major TRAUMA.
Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.
Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.
Diseases caused by factors involved in one's employment.
Lung damage that is caused by the adverse effects of PULMONARY VENTILATOR usage. The high frequency and tidal volumes produced by a mechanical ventilator can cause alveolar disruption and PULMONARY EDEMA.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
RESPIRATORY MUSCLE contraction during INHALATION. The work is accomplished in three phases: LUNG COMPLIANCE work, that required to expand the LUNGS against its elastic forces; tissue resistance work, that required to overcome the viscosity of the lung and chest wall structures; and AIRWAY RESISTANCE work, that required to overcome airway resistance during the movement of air into the lungs. Work of breathing does not refer to expiration, which is entirely a passive process caused by elastic recoil of the lung and chest cage. (Guyton, Textbook of Medical Physiology, 8th ed, p406)
Measurement of oxygen and carbon dioxide in the blood.
The pressure that would be exerted by one component of a mixture of gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Gases, fumes, vapors, and odors escaping from the cylinders of a gasoline or diesel internal-combustion engine. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Random House Unabridged Dictionary, 2d ed)
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
The capability of the LUNGS to distend under pressure as measured by pulmonary volume change per unit pressure change. While not a complete description of the pressure-volume properties of the lung, it is nevertheless useful in practice as a measure of the comparative stiffness of the lung. (From Best & Taylor's Physiological Basis of Medical Practice, 12th ed, p562)
Surgical formation of an opening into the trachea through the neck, or the opening so created.
The figwort plant family of the order Lamiales. The family is characterized by bisexual flowers with tubular corollas (fused petals) that are bilaterally symmetrical (two-lips) and have four stamens in most, two of which are usually shorter.
A plant genus of the family CHENOPODIACEAE. The extract may be called lochein. Tumbleweed may occasionally refer to AMARANTHUS.
Statement of the position requirements, qualifications for the position, wage range, and any special conditions expected of the employee.
Techniques for supplying artificial respiration to a single lung.
The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air pressure within a closed environment.
Any compound that contains a constituent sugar, in which the hydroxyl group attached to the first carbon is substituted by an alcoholic, phenolic, or other group. They are named specifically for the sugar contained, such as glucoside (glucose), pentoside (pentose), fructoside (fructose), etc. Upon hydrolysis, a sugar and nonsugar component (aglycone) are formed. (From Dorland, 28th ed; From Miall's Dictionary of Chemistry, 5th ed)
Naturally occurring complex liquid hydrocarbons which, after distillation, yield combustible fuels, petrochemicals, and lubricants.
Helium. A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. (Dorland, 27th ed)
The only family of the buckwheat order (Polygonales) of dicotyledonous flowering plants. It has 40 genera of herbs, shrubs, and trees.
A large plant genus of the family EUPHORBIACEAE, order Euphorbiales, subclass Rosidae. They have a milky sap and a female flower consisting of a single pistil, surrounded by numerous male flowers of one stamen each. Euphorbia hirta is rarely called milkweed but that name is normally used for ASCLEPIAS.
Elements of limited time intervals, contributing to particular results or situations.
Hospital units providing continuous surveillance and care to acutely ill patients.
A type of oropharyngeal airway that provides an alternative to endotracheal intubation and standard mask anesthesia in certain patients. It is introduced into the hypopharynx to form a seal around the larynx thus permitting spontaneous or positive pressure ventilation without penetration of the larynx or esophagus. It is used in place of a facemask in routine anesthesia. The advantages over standard mask anesthesia are better airway control, minimal anesthetic gas leakage, a secure airway during patient transport to the recovery area, and minimal postoperative problems.
Body ventilators that assist ventilation by applying intermittent subatmospheric pressure around the thorax, abdomen, or airway and periodically expand the chest wall and inflate the lungs. They are relatively simple to operate and do not require tracheostomy. These devices include the tank ventilators ("iron lung"), Portalung, Pneumowrap, and chest cuirass ("tortoise shell").
Supplies used in building.
The exposure to potentially harmful chemical, physical, or biological agents by inhaling them.
A condition of the newborn marked by DYSPNEA with CYANOSIS, heralded by such prodromal signs as dilatation of the alae nasi, expiratory grunt, and retraction of the suprasternal notch or costal margins, mostly frequently occurring in premature infants, children of diabetic mothers, and infants delivered by cesarean section, and sometimes with no apparent predisposing cause.
Devices that cover the nose and mouth to maintain aseptic conditions or to administer inhaled anesthetics or other gases. (UMDNS, 1999)
Measure of the maximum amount of air that can be breathed in and blown out over a sustained interval such as 15 or 20 seconds. Common abbreviations are MVV and MBC.
Measurement of the various processes involved in the act of respiration: inspiration, expiration, oxygen and carbon dioxide exchange, lung volume and compliance, etc.
The buttercup plant family of the order Ranunculales, subclass Magnoliidae, class Magnoliopsida. The leaves are usually alternate and stalkless. The flowers usually have two to five free sepals and may be radially symmetrical or irregular.
Measurement of the amount of air that the lungs may contain at various points in the respiratory cycle.
Waste products which threaten life, health, or the environment when improperly treated, stored, transported, disposed of, or otherwise managed.
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
Cholestane derivatives containing a fused lactone ring at the 16,17-position and a spiroglycosidic linkage at C-22. Members include sarsaponin, DIOSGENIN and yamogenin.
A large plant family in the order Apiales, also known as Umbelliferae. Most are aromatic herbs with alternate, feather-divided leaves that are sheathed at the base. The flowers often form a conspicuous flat-topped umbel. Each small individual flower is usually bisexual, with five sepals, five petals, and an enlarged disk at the base of the style. The fruits are ridged and are composed of two parts that split open at maturity.
Advanced and highly specialized care provided to medical or surgical patients whose conditions are life-threatening and require comprehensive care and constant monitoring. It is usually administered in specially equipped units of a health care facility.
A group of proteobacteria consisting of chemoorganotrophs usually associated with the DIGESTIVE SYSTEM of humans and animals.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
That part of the RESPIRATORY TRACT or the air within the respiratory tract that does not exchange OXYGEN and CARBON DIOXIDE with pulmonary capillary blood.
A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
Relatively complete absence of oxygen in one or more tissues.
Surgical incision of the trachea.
The parts of plants, including SEEDS.
Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow.
Volative flammable fuel (liquid hydrocarbons) derived from crude petroleum by processes such as distillation reforming, polymerization, etc.
Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)
The discarding or destroying of garbage, sewage, or other waste matter or its transformation into something useful or innocuous.
The number of times an organism breathes with the lungs (RESPIRATION) per unit time, usually per minute.
Unforeseen occurrences, especially injuries in the course of work-related activities.
An enlarged underground root or stem of some plants. It is usually rich in carbohydrates. Some, such as POTATOES, are important human FOOD. They may reproduce vegetatively from buds.
Experiments designed to determine the potential toxic effects of one-time, short-term exposure to a chemical or chemicals.
A transient absence of spontaneous respiration.
A mass spectrometric technique that is used for the analysis of a wide range of biomolecules, such as glycoalkaloids, glycoproteins, polysaccharides, and peptides. Positive and negative fast atom bombardment spectra are recorded on a mass spectrometer fitted with an atom gun with xenon as the customary beam. The mass spectra obtained contain molecular weight recognition as well as sequence information.
Damage to any compartment of the lung caused by physical, chemical, or biological agents which characteristically elicit inflammatory reaction. These inflammatory reactions can either be acute and dominated by NEUTROPHILS, or chronic and dominated by LYMPHOCYTES and MACROPHAGES.
A reduction in the amount of air entering the pulmonary alveoli.
The musculofibrous partition that separates the THORACIC CAVITY from the ABDOMINAL CAVITY. Contraction of the diaphragm increases the volume of the thoracic cavity aiding INHALATION.
The posture of an individual lying face down.
Carbon monoxide (CO). A poisonous colorless, odorless, tasteless gas. It combines with hemoglobin to form carboxyhemoglobin, which has no oxygen carrying capacity. The resultant oxygen deprivation causes headache, dizziness, decreased pulse and respiratory rates, unconsciousness, and death. (From Merck Index, 11th ed)
The promotion and maintenance of physical and mental health in the work environment.
Application of positive pressure to the inspiratory phase of spontaneous respiration.
The means of moving persons, animals, goods, or materials from one place to another.
Inhalation of oxygen aimed at restoring toward normal any pathophysiologic alterations of gas exchange in the cardiopulmonary system, as by the use of a respirator, nasal catheter, tent, chamber, or mask. (From Dorland, 27th ed & Stedman, 25th ed)
Physiological processes and properties of the RESPIRATORY SYSTEM as a whole or of any of its parts.
Unstable isotopes of krypton that decay or disintegrate emitting radiation. Kr atoms with atomic weights 74-77, 79, 81, 85, and 87-94 are radioactive krypton isotopes.
A condition of lung damage that is characterized by bilateral pulmonary infiltrates (PULMONARY EDEMA) rich in NEUTROPHILS, and in the absence of clinical HEART FAILURE. This can represent a spectrum of pulmonary lesions, endothelial and epithelial, due to numerous factors (physical, chemical, or biological).
The circulation of the BLOOD through the LUNGS.
These include the muscles of the DIAPHRAGM and the INTERCOSTAL MUSCLES.
A pulmonary ventilation rate faster than is metabolically necessary for the exchange of gases. It is the result of an increased frequency of breathing, an increased tidal volume, or a combination of both. It causes an excess intake of oxygen and the blowing off of carbon dioxide.
A noble gas that is found in the atmosphere. It has the atomic symbol Kr, atomic number 36, atomic weight 83.80, and has been used in electric bulbs.
Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water.
Absence of air in the entire or part of a lung, such as an incompletely inflated neonate lung or a collapsed adult lung. Pulmonary atelectasis can be caused by airway obstruction, lung compression, fibrotic contraction, or other factors.
X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.
Injury following pressure changes; includes injury to the eustachian tube, ear drum, lung and stomach.
Any hindrance to the passage of air into and out of the lungs.
A disease or state in which death is possible or imminent.
A state in western Australia. Its capital is Perth. It was first visited by the Dutch in 1616 but the English took possession in 1791 and permanent colonization began in 1829. It was a penal settlement 1850-1888, became part of the colonial government in 1886, and was granted self government in 1890. (From Webster's New Geographical Dictionary, 1988, p1329)
Removal of an endotracheal tube from the patient.
The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.
Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity.
Plants whose roots, leaves, seeds, bark, or other constituent parts possess therapeutic, tonic, purgative, curative or other pharmacologic attributes, when administered to man or animals.
The volume of air remaining in the LUNGS at the end of a normal, quiet expiration. It is the sum of the RESIDUAL VOLUME and the EXPIRATORY RESERVE VOLUME. Common abbreviation is FRC.
Any disorder marked by obstruction of conducting airways of the lung. AIRWAY OBSTRUCTION may be acute, chronic, intermittent, or persistent.
Cells specialized to detect chemical substances and relay that information centrally in the nervous system. Chemoreceptor cells may monitor external stimuli, as in TASTE and OLFACTION, or internal stimuli, such as the concentrations of OXYGEN and CARBON DIOXIDE in the blood.
An infant during the first month after birth.
The act of BREATHING in.
Procedure in which patients are induced into an unconscious state through use of various medications so that they do not feel pain during surgery.
The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)
Excessive accumulation of extravascular fluid in the lung, an indication of a serious underlying disease or disorder. Pulmonary edema prevents efficient PULMONARY GAS EXCHANGE in the PULMONARY ALVEOLI, and can be life-threatening.
Pathological processes involving any part of the LUNG.
Mechanical ventilation delivered to match the patient's efforts in breathing as detected by the interactive ventilation device.
Studies designed to examine associations, commonly, hypothesized causal relations. They are usually concerned with identifying or measuring the effects of risk factors or exposures. The common types of analytic study are CASE-CONTROL STUDIES; COHORT STUDIES; and CROSS-SECTIONAL STUDIES.
Health care provided to a critically ill patient during a medical emergency or crisis.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The motion of air currents.
Place or physical location of work or employment.
Ventilation of the middle ear in the treatment of secretory (serous) OTITIS MEDIA, usually by placement of tubes or grommets which pierce the TYMPANIC MEMBRANE.
Tumors, cancer or other neoplasms produced by exposure to ionizing or non-ionizing radiation.
Care of patients with deficiencies and abnormalities associated with the cardiopulmonary system. It includes the therapeutic use of medical gases and their administrative apparatus, environmental control systems, humidification, aerosols, ventilatory support, bronchopulmonary drainage and exercise, respiratory rehabilitation, assistance with cardiopulmonary resuscitation, and maintenance of natural, artificial, and mechanical airways.
A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.
Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting edema several days later may cause death. (From Merck, 11th ed) It is a major atmospheric pollutant that is able to absorb UV light that does not reach the earth's surface.
A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Particles of any solid substance, generally under 30 microns in size, often noted as PM30. There is special concern with PM1 which can get down to PULMONARY ALVEOLI and induce MACROPHAGE ACTIVATION and PHAGOCYTOSIS leading to FOREIGN BODY REACTION and LUNG DISEASES.
Small polyhedral outpouchings along the walls of the alveolar sacs, alveolar ducts and terminal bronchioles through the walls of which gas exchange between alveolar air and pulmonary capillary blood takes place.
Methods of creating machines and devices.
Hospital units providing continuous surveillance and care to acutely ill infants and children. Neonates are excluded since INTENSIVE CARE UNITS, NEONATAL is available.
A group of polycyclic compounds closely related biochemically to TERPENES. They include cholesterol, numerous hormones, precursors of certain vitamins, bile acids, alcohols (STEROLS), and certain natural drugs and poisons. Steroids have a common nucleus, a fused, reduced 17-carbon atom ring system, cyclopentanoperhydrophenanthrene. Most steroids also have two methyl groups and an aliphatic side-chain attached to the nucleus. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.
Means or process of supplying water (as for a community) usually including reservoirs, tunnels, and pipelines and often the watershed from which the water is ultimately drawn. (Webster, 3d ed)
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
Serious INFLAMMATION of the LUNG in patients who required the use of PULMONARY VENTILATOR. It is usually caused by cross bacterial infections in hospitals (NOSOCOMIAL INFECTIONS).
A human infant born before 37 weeks of GESTATION.
Continuous recording of the carbon dioxide content of expired air.
DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.
Water containing no significant amounts of salts, such as water from RIVERS and LAKES.
An acronym for Acute Physiology and Chronic Health Evaluation, a scoring system using routinely collected data and providing an accurate, objective description for a broad range of intensive care unit admissions, measuring severity of illness in critically ill patients.
A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
Inhaling and exhaling the smoke of burning TOBACCO.
Relating to the size of solids.
A technique of respiratory therapy, in either spontaneously breathing or mechanically ventilated patients, in which airway pressure is maintained above atmospheric pressure throughout the respiratory cycle by pressurization of the ventilatory circuit. (On-Line Medical Dictionary [Internet]. Newcastle upon Tyne(UK): The University Dept. of Medical Oncology: The CancerWEB Project; c1997-2003 [cited 2003 Apr 17]. Available from:
The period of confinement of a patient to a hospital or other health facility.
Substances and drugs that lower the SURFACE TENSION of the mucoid layer lining the PULMONARY ALVEOLI.
The relationships of groups of organisms as reflected by their genetic makeup.
Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weights 121-123, 125, 127, 133, 135, 137-145 are radioactive xenon isotopes.
The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.
Complete or severe weakness of the muscles of respiration. This condition may be associated with MOTOR NEURON DISEASES; PERIPHERAL NERVE DISEASES; NEUROMUSCULAR JUNCTION DISEASES; SPINAL CORD DISEASES; injury to the PHRENIC NERVE; and other disorders.
The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine.
The volume of air that is exhaled by a maximal expiration following a maximal inspiration.
Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents.
The act of blowing a powder, vapor, or gas into any body cavity for experimental, diagnostic, or therapeutic purposes.
A chronic lung disease developed after OXYGEN INHALATION THERAPY or mechanical ventilation (VENTILATION, MECHANICAL) usually occurring in certain premature infants (INFANT, PREMATURE) or newborn infants with respiratory distress syndrome (RESPIRATORY DISTRESS SYNDROME, NEWBORN). Histologically, it is characterized by the unusual abnormalities of the bronchioles, such as METAPLASIA, decrease in alveolar number, and formation of CYSTS.
Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
A noble gas with the atomic symbol Xe, atomic number 54, and atomic weight 131.30. It is found in the earth's atmosphere and has been used as an anesthetic.
A measure of the amount of WATER VAPOR in the air.
A state characterized by loss of feeling or sensation. This depression of nerve function is usually the result of pharmacologic action and is induced to allow performance of surgery or other painful procedures.
Tumors or cancer of the LUNG.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
The extra volume of air that can be expired with maximum effort beyond the level reached at the end of a normal, quiet expiration. Common abbreviation is ERV.
The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract.
The act of BREATHING out.
Diseases of the respiratory system in general or unspecified or for a specific respiratory disease not available.
A respiratory distress syndrome in newborn infants, usually premature infants with insufficient PULMONARY SURFACTANTS. The disease is characterized by the formation of a HYALINE-like membrane lining the terminal respiratory airspaces (PULMONARY ALVEOLI) and subsequent collapse of the lung (PULMONARY ATELECTASIS).
Disease having a short and relatively severe course.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
The artificial substitution of heart and lung action as indicated for HEART ARREST resulting from electric shock, DROWNING, respiratory arrest, or other causes. The two major components of cardiopulmonary resuscitation are artificial ventilation (RESPIRATION, ARTIFICIAL) and closed-chest CARDIAC MASSAGE.
For at imødekomme dette tilpasses og justeres ventilation, strømforsyning og kontrol- og signalsystemer. London Underground ... London Underground (også kendt som the Underground eller the Tube) er et metrosystem, der betjener store dele af Storlondon og ... Beck's Underground Map. London: Capital Transport. ISBN 1854141686.. *. Green, Oliver (1988). The London Underground: An ... "Underground History. Retrieved 31 May 2011.. *. Wolmar, Christian (2002). Down the Tube: the Battle for London's Underground. ...
1 & 2 pits employed 85 underground and 75 surface workers. but by 1933 this had risen to 1,261 underground and 287 on the ... Walkers of Wigan supplied the 28 feet (8.5 m) diameter ventilation fan and engine. Ventilation was important; the temperature ... The colliery became part of the National Coal Board in 1947 and subsequently it was linked underground to Golborne and ...
Of the men underground, 73 were killed and 26 were rescued. Changes were then made to the colliery's ventilation. The downcast ... To force air through the underground workings, fans are used but at this date, ventilation was by induced draught from a ... realised before the end of the first day that all the remaining men underground must be dead and from midnight underground ... To improve the ventilation and alleviate the problem of gas issuing from the seam, a drift through the rock was blasted from ...
... large London Underground roundels; and original bronze signs, ventilation grilles and information panel frames. The sub-surface ... Bounds Green Underground Station "Station Refurbishment Summary" (PDF). London Underground Railway Society. July 2007. ... "Piccadilly line timetable: From Bounds Green Underground Station to Arnos Grove Underground Station". Transport for London. ... "Piccadilly line timetable: From Bounds Green Underground Station to Wood Green Underground Station". Transport for London. ...
Goodin, Dan (December 20, 2013). "Cards stolen in massive Target breach flood underground "card shops"". Ars Technica. ... Goodin, Dan (February 5, 2014). "Target hackers reportedly used credentials stolen from ventilation contractor". Ars Technica. ...
2001). Handbook of heating, ventilation, and air conditioning. CRC Press. ISBN 978-0-8493-9584-0. .. ... Common storage media are cool outside air, deep aquifers, or a natural underground rock mass accessed via a cluster of small- ... For Heating, ventilation and air conditioning, see HVAC. For air conditioning systems in vehicles, see Automobile air ... In construction, a complete system of heating, ventilation, and air conditioning is referred to as HVAC.[3] ...
In 1896 Gin Pit employed 240 underground and 55 surface workers producing household and steam coal and coal to produce gas. The ... The colliery was linked to St George's Colliery for ventilation. The colliery became part of Manchester Collieries in 1929. In ... In 1923 the colliery had 237 underground and 57 surface workers. In common with many collieries on the Lancashire Coalfield, ...
The building's ventilation system was also upgraded. The renovation left the structure with 1,400,000 square feet (130,000 m2) ... The 700,000-square-foot (65,000 m2) underground parking garage contains 1,500 spaces. Several amenities were also added to the ... ventilation shafts for the parking garage in a secure area; and special security procedures to obtain access to the building's ... steel-jacketed underground parking garage columns capable of withstanding a powerful explosion; six fully staffed security ...
Near the bazaar were warehouses with little ventilation located underground.[citation needed] Since merchants from various ...
Air ventilation shafts leading into the bunkers were not sealed. The high explosives subject to the controversy were the only ... The Qa'qaa Store was located at the southern end of the facility in underground bunkers. The bunker doors were sealed by IAEA ... "suggests taking the HMX from underground bunkers where it had been kept under seal by the International Atomic Energy Agency ...
The technique was very dangerous in underground workings without adequate ventilation. The method became largely redundant with ... As the number and complexity of the underground workings increased, care was needed to channel the air draught to all parts of ... In Book XXXIII, he describes mining methods for gold, and the pursuit of the gold-bearing veins underground using tunnels and ... The problem raises the question of ventilation means in the mines, a problem often solved by ensuring that there was a ...
In the weeks following, Wasatch Environmental installed underground soil-ventilation systems. Several businesses, including the ...
Underground uranium mining is in principle no different from any other hard rock mining and other ores are often mined in ... Since that time, ventilation and other measures have been used to reduce radon levels in most affected mines that continue to ... If the uranium is too far below the surface for open pit mining, an underground mine might be used with tunnels and shafts dug ... The Olympic Dam and Canadian underground mines are ventilated with powerful fans with radon levels being kept at a very low to ...
Some collieries were connected underground to rationalise winding operations and facilitate ventilation. In 1890 eight ... It was linked underground to the King, Queen and Legh Pits. Queen Pit Queen Pit opened before 1849 and closed in 1920. On 26 ... It was connected underground to the Princess, Queen and Legh Pits. Legh The Legh Pit opened in 1855 and closed in 1911. Lyme ... It was linked underground to the King, Princess and Legh Pits. Ram Pit, sunk in 1901, never went into production because of ...
Return air is extracted by ventilation fans mounted on the surface. Other ventilation methods can be used where intake air also ... Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6-1.0 m ... "Underground Mining". Archived from the original on 2012-06-10. Retrieved 2014-05-24. CS1 maint: discouraged parameter (link) ... Longwall and room and pillar methods of mining can both be used for mining suitable underground coal seams. Longwall has better ...
Most of the workers managed to escape, but 18 workers were trapped underground. Ventilation was returned quickly to around 200 ... Stubley, Peter (22 October 2018). "Eighteen miners trapped underground in China after two killed in tunnel collapse". The ...
Firstly, underground mine ventilation in some districts of Dennis was probably inadequate; in particular, the 14's and 29's ... At the time up to 500 men were working underground on the night shift with more than half in the affected areas. The rest were ... Within a matter of months, normal ventilation was restored to the Slant section: this work was, to that date, the first ever ... "Ventilation", Coal Mines Act, UK Parliament, 1911, §29, 1 & 2 Geo 5, chapter 50, retrieved 29 September 2018 - via Durham ...
Air-conditioning and ventilation system for environmental control of stations and tunnels. Third Rail current collection system ... Underground substations with dry-type transformers and SF6 circuit breakers. Tunnel-Train VHF-radio communication system. ... As a result, it took nearly 23 years to completely construct around 15 km underground railway from Birpara up to Tollygunge ... 2 are at grade and the remaining 15 are underground with a total distance of 31.3 km. The line connects Dakshineswar and New ...
The attic contains ventilation equipment, a TTC substation and a city sewer pipe. There is a double crossover just south of the ... Lawrence was the first station in the network to feature an underground bus terminal. On April 23, 2007, TTC employee Antonio ... "Lawrence Station: Fire Ventilation Upgrade". TTC. Archived from the original on May 18, 2015. Retrieved May 17, 2015. "3080 ... Between the fourth quarter of 2012 and mid-2015, four high-capacity fire ventilation fans were installed at the station. In ...
He engineered a rainwater collection system and a tunnel for ventilation. The underground home was reportedly never hotter than ... Critzer perished in a self-detonated dynamite explosion in his underground rooms on July 24, 1942, while being investigated by ...
Some design features include 36 underground cross passages, spaced every 120 m, a longitudinal ventilation system, fire ... There are two ventilation shafts. The western shaft is located in the Brisbane Botanic Gardens, Mount Coot-tha with the station ... In November 2013 The Queensland Minister for Transport and Main Roads announced a plan to connect buses from the Underground ... Underground's Legacy connection, Minister for Transport and Main Roads, The Honourable Scott Emerson, Media Statement, 19 ...
HVAC: heating, ventilation, air-conditioning, sanitary facilities, cold rooms electricity and HVAC maintenance and proposes ... It further reinforces its activity of underground networks. CFE is making an asset deal with the company Leloup Entreprise ... CFE participates for 25% into the company Druart, a company specialized in heating, ventilation, air conditioning and cooling. ... This company is specialized in HVAC (heating, ventilation, air conditioning) and sanitary equipment. In 2011, CFE expands its ...
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z References External links Adit An adit is an underground level or tunnel to ... Furnace, furnace pit Furnaces were used in the 19th century instead of fans for ventilation. The furnace was usually at the ... Bump A bump, pounce, thump or goff was a sudden movement in the strata while underground and occasionally gave warning of an ... Overman The overman or (in a few areas) overlooker, bailiff or gaffer was the foreman or senior underground official of a pit, ...
In the underground mining industry, ethanethiol or ethyl mercaptan is referred to as "stench gas".[10] The gas is released into ... mine ventilation systems to alert mine workers during an emergency. In Ontario, mining legislation dictates that "The alarm ... system in an underground mine shall, consist of the introduction into all workplaces of sufficient quantities of ethyl ...
The concentration of methane and other airborne contaminants underground can generally be controlled by dilution (ventilation ... Mining ventilation is a significant safety concern for many miners. Poor ventilation inside sub-surface mines causes exposure ... The air circulation necessary for effective ventilation of a mine is generated by one or more large mine fans, usually located ... Even in cases where mine collapses are not instantly fatal, they can trap mine workers deep underground. Cases such as these ...
Emergency ventilation systems also proved inadequate. Over 1,300 fire and emergency personnel responded and the fire itself was ... Many victims became disoriented in the dark, smoke-filled underground station and died of asphyxiation looking for exits. ...
... the hill was dug out and a large underground chamber of 300 square yards (the size of a tennis court) 13 feet (8m) underground ... The question of ventilation was vital, as were plausible cover stories for the workers. These solutions were found: The big ... In 1987, the site was restored to preserve and display the kibbutz and the underground factory to the public. It is one of the ... The chimney of the bakery became part of the ventilation system. Its counterpart - one to get fresh air in, the other one to ...
After the shooting, Dykes took Gilman to a 6-foot by 8-foot underground bunker on his property. The bunker contained homemade ... FBI hostage negotiators arrived at the bunker and began communicating with Dykes through the ventilation pipe, as he instructed ... bombs and was equipped with a PVC ventilation pipe. Hostage negotiators cooperated with Dykes in an attempt to obtain Gilman's ...
... providing ventilation. The colliery became known as the Bradford Colliery Company, and by 1896 employed 404 underground and 125 ... ventilation was by means of two axial-type fans installed in an underground chamber. After 1947 a 460-yard (420 m) tunnel 55 ... A sirocco-type ventilation fan made by Hick, Hargreaves, which could be powered by either electricity or steam, was provided. ... The transport of coal underground was improved by the installation of three-ton mine cars hauled by a battery-powered ...
... supplies a wide range of ventilation products for underground ventilation, including variable and simple fixed pitch ... It was further expanded to produce underground mining equipment, mostly main mine ventilation fans. In the end of 50-s - ... The factory produces ventilation equipment, such as main mine ventilation fans, for a number of large mining companies, ... At that time the plant's main product range was expanded from main mine ventilation fans to ventilation equipment for subways ...
... heating Ventilation and Air Conditioning) Electrical Building Services, Plumbing and drainage. Also other possible design ... Underground city. Building damageEdit. A building in Massueville (Quebec, Canada), engulfed by fire ...
The underground railway station also needed a redesign for the underground part of the fire exhaustion system. Incoming or ... The key directive of the verdict was that rooms must be provided with adequate ventilation if windows are closed due to noise, ... By May 2016, it had become clear that an expedited approval of the underground station would not happen.[147] Because of this, ... This means it would take more time to simulate the exact solution for the underground railway station.[260] The Federal Railway ...
These projects included improving ventilation to the auditorium, more bars and restaurants, new improved seating, better ... the south steps leading down to Prince Consort Road were demolished to allow construction of an underground vehicle access and ...
The Super-K is located 1,000 m (3,300 ft) underground in the Mozumi Mine in Hida's Kamioka area. It consists of a cylindrical ... This variation is due to the chimney effect in the ventilation pattern of the mine tunnel system; in cold seasons, fresh air ... It is located 1,000 m (3,300 ft) underground in the Mozumi Mine in Hida's Kamioka area. The observatory was designed to detect ...
Used for long drops and underground conduit[21]. 3.650. RG-56/U. 48. 1.4859. 0.308. 7.82. Dual braid shielded. Rated to 8000 ... "Plenum" cabling is expensive and comes with a special Teflon-based outer jacket designed for use in ventilation ducts to meet ... It is often used in elevator shafts, US Navy Ships, underground transportation tunnels and in other areas where an antenna is ... "Flooded" cable is infused with waterblocking gel for use in underground conduit or direct burial. "Messenger" may contain some ...
"Weather History for Sukkur, Pakistan - Weather Underground".. *^ What Is The Most Humid City In The U.S.? , KOMO-TV - Seattle, ... Heating, ventilation and air conditioning. Fundamental concepts. *Air changes per hour. *Bake-out ...
They may use windcatchers to circulate air into an underground or semi-underground chamber, evaporatively cooling the ice so ... A windcatcher (wind tower, wind scoop) is a traditional architectural element used to create natural ventilation and passive ... Night-flushing cools the house by increasing ventilation at night, when the outdoor air is cooler;[5] windtowers can assist ... These are often found underground. Below approximately 6m of depth, soil and groundwater is always at about the annual mean- ...
A 16th century underground alchemical laboratory was accidentally discovered in the year 2002. Rudolf II, Holy Roman Emperor ... ventilation as well as respiratory testing and indoor air quality. An important element of such audits is the review of ...
They were removed from their underground burrows each spring, as young pups, with a large vacuum device.[28] They can be ... The holes also possibly provide ventilation as the air enters through the dome crater and leaves through the rim crater, ... Behaviors that signal that a female is in estrus include underground consorting, self-licking of genitals, dust-bathing, and ... again with the underground prairie dogs emerging to watch.[16] ...
Along with the rest of the terracotta army, it was buried underground for 2,000 years until it was unearthed in 1980. On 1 ... emphasis on sustainable and energy-saving practices with the exterior offering thermal insulation and natural ventilation. The ...
Most caecilians live underground in burrows in damp soil, in rotten wood and under plant debris, but some are aquatic.[49] Most ... Ventilation is accomplished by buccal pumping.[66] Most amphibians, however, are able to exchange gases with the water or air ... Caecilians, some plethodontid salamanders and certain frogs lay eggs underground that are unpigmented. In the wood frog (Rana ... Brainerd, E. L. (1999). "New perspectives on the evolution of lung ventilation mechanisms in vertebrates". Experimental Biology ...
Jay manages to collapse one of the ventilation tunnels on top of an EmbroGen guard and steals his keycard in order to open up ... All that's left for the two fugitives is to gain access to the secret underground laboratories to at least save the existing ... As his wife leaves the building, Marshall is taken down to the underground laboratory by Salko and introduced to the clones. He ... At EmbroGen, Salko and another of his operatives review the video footage taken from the security cameras in the underground ...
International Energy Agency, Air Infiltration and Ventilation Center, Ventilation Information Paper No. 11, 2006, "Use of Earth ... underground and a blower of 1.5 kW rated power was employed. The underground temperature at that depth was found to be around ... The underground temperature seems to be of prime importance when planning an Earth-Air heat exchanger. In the context of ... A ground-coupled heat exchanger is an underground heat exchanger that can capture heat from and/or dissipate heat to the ground ...
It can be found in confined areas of poor ventilation in both surface mines and underground mines. The most common sources of ...
There are six principal methods of underground mining: *Longwall mining accounts for about 50 percent of underground production ... Once room and pillar mines have been developed to a stopping point (limited by geology, ventilation, or economics), a ... Most coal seams are too deep underground for opencast mining and require underground mining, a method that currently accounts ... In Australia, "colliery" generally refers to an underground coal mine. In the United States, "colliery" has been used[when?] to ...
... ventilation of rage, or other sorts of acute emotional discharge. To do this, a variety of coercive techniques are used, ... underground movement for the 'treatment' of children who pose disciplinary problems to their parents or caregivers."[14] ...
His design had air being drawn into an underground chamber, where it would undergo either heating or cooling. It would then ... Historical Ventilation Rates Author or Source. Year. Ventilation Rate (IP). Ventilation Rate (SI). Basis or rationale ... Demand-controlled ventilation (DCV)Edit. Demand-controlled ventilation (DCV, also known as Demand Control Ventilation) makes it ... Smart ventilationEdit. Smart ventilation is a process to continually adjust the ventilation system in time, and optionally by ...
Parsons Green bombing: 15 September 2017, A non-fatal bombing of a London Underground train resulting in 30 injured persons. ... and who can provide interventions outside the normal scope of practice of a paramedic like mechanical ventilation and sedation ... King's Cross fire: 18 November 1987, 31 people died in a major fire in the Underground station[23] ...
... the act required that ventilation fans in all collieries be capable of reversing the air current underground; this measure was ... Just after 8:00 am an explosion occurred in the west side of the underground workings. It is possible there were two explosions ... The overman was the underground foreman responsible for the infrastructure in the workings: pit props, tramways, roads, etc.[51 ... Edward Shaw, the colliery manager, was on the surface and the remaining shift foremen were still underground and unable to give ...
Butterfield, N. J. (2009). "Oxygen, animals and oceanic ventilation: An alternative view". Geobiology. 7 (1): 1-7. doi:10.1111/ ... "Underground Vendobionta From Namibia". Palaeontology. 45 (1): 57-78. doi:10.1111/1475-4983.00227 ...
... powerful underground rivers may form, creating large underground voids. ... Eventually, these underground voids became large enough that their roofs collapsed to create large holes.[43] ... A process called "soil piping" first created large underground voids, as water from leaking water mains flowed through these ... Sinkholes near the Dead Sea, formed when underground salt is dissolved by freshwater intrusion, due to continuing sea-level ...
Underground piping systems for landscaping drainage or the disposal of stormwater or groundwater also use low-pressure gravity ... Adequate ventilation is essential to remove metal fumes from welding operations, and personal protective equipment must be worn ...
Entrance features may prevent flooding and/or aid in ventilation.[6][9][10] Dome mounds consist of loosely packed subterranean ... Black-tailed prairie dog gestation is 34 days.[6][9] Parturition occurs underground. Information about litter size at time of ... and underground roots are preferred.[9][30] Shrubs such as rabbitbrush (Chrysothamnus spp.), winterfat (Krascheninnikovia ... Black-tailed prairie dog nests are located underground in burrows and are composed of fine, dried grass. Nest material is ...
Common storage mediums are deep aquifers or a natural underground rock mass accessed via a cluster of small-diameter, heat- ... VentilationEdit. Main article: Ventilation (architecture). Ventilation is the process of changing or replacing air in any space ... Demand controlled kitchen ventilationEdit. Main article: Demand controlled ventilation. Demand controlled kitchen ventilation ( ... Natural ventilation is the ventilation of a building with outside air without using fans or other mechanical systems. It can be ...
In 2007, the paper began operating under the name The Boston Underground; the original editorial focus on campus issues has ... "fissures to provide maximum solar access to bedrooms as well as natural ventilation throughout the building."[63] The building ... Even more independent, The Student Underground, focuses on alternative political and cultural activity. Since 1997, issues have ... Its staff was not officially recognized as a registered student activity group but, like the Underground, was entirely student- ...
In the ventilation phase of a ventilation/perfusion scan, a gaseous radionuclide xenon or technetium DTPA in an aerosol form ( ... For example, huge neutrino detection underground tanks filled with tetrachloroethylene are surrounded by arrays of photo ... The most common indication for lung scintigraphy is to diagnose pulmonary embolism, e.g. with a ventilation/perfusion scan and ...
Features often include ventilation systems and separate chambers for the queen, her eggs, and developing individuals.[3] ... Raccoons, and other rodents, use leaves to build nest underground and in trees. Tree squirrels build their nests (dreys) in ... Ant nests feature an elaborate colony structure that may extend 2 metres (6.6 ft) or more underground. As the structure gets ... further underground, individual chambers become farther and farther apart indicating that the ant is aware of its depth. It is ...
Ventilation/perfusion scan. *Radionuclide ventriculography. *Radionuclide angiography. *Radioisotope renography. *Sestamibi ...
... two-storey link to the adjacent A-Block and a single-storey underground service duct.[citation needed] ... with special regard to advances in antiseptic treatment in surgery and the application of plenum ventilation. Notable elements ...
Mining Project: Improved Ventilation Effectiveness in Underground Coal Mines. Keywords: Methane control Ventilation ... Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal ... Available mine ventilation strategies and methane control systems have been challenged by recent developments in mining methods ... This projects goal was to enhance worker safety by decreasing the likelihood of explosions produced by hazardous underground ...
An underground porosity reservoir includes substantially impermeable barriers and an aquiclude surrounding a volume of alluvial ... Underground porosity reservoirs, such as those described in U.S. Pat. No. 6,840,710 titled UNDERGROUND ALLUVIAL WATER STORAGE ... The underground reservoir 30 encloses a volume of natural alluvium 24, and the water storage provided by the reservoir 30 is in ... bounded by substantially impermeable walls to create an underground vessel capable of storing water. Underground reservoirs are ...
... is one of Australias leading underground ventilation ducting suppliers. All EVSs ventilation ducts are professionally ...
Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and ... Flow-through ventilation is the main ventilation circuit for the mine. Air enters the mine from surface via a shaft, ... The largest component of the operating cost for mine ventilation is electricity to power the ventilation fans, which may ... ventilation raise or adit. The air is distributed through the mine via internal ventilation raises and ramps, and flows are ...
Keywords: heat transfer, forced convection, underground ventilation, baffle. 1 Introduction Nowadays, underground spaces are ... The ventilation system is a key factor in the design of such spaces. Moreover, as the underground operations are continuing to ... The Effect Of A Baffle On The Heat Transfer In Underground Auxiliary Ventilation Systems ... The Effect Of A Baffle On The Heat Transfer In Underground Auxiliary Ventilation Systems ...
Septic Tanks and Accessories: weve got it. Take advantage of unbeatable inventory and prices from Quebecs expert in construction & renovation.
Presents the design of a no-duct inductive ventilation system for an underground park. Compares the advantages and ... Analyses the feature and cardinal principle of the no-duct inductive ventilation system. ... No-duct inductive ventilation system design for an underground park. By Xia Tian and Chen Yong (China Southwest Architectural ... Presents the design of a no-duct inductive ventilation system for an underground park. Compares the advantages and ...
... find more Balanced pressure ventilation door used for mine underground suppliers & manufacturers on ... China Balanced pressure ventilation door used for mine underground products offered by Jining Dongda Group Mining Machinery Co ... Ventilation Hose Ventilation Pipe Ventilation Ducts Mine Screen View all Mine Winch Mine Sieve Underground Lamp Underground ... No Pressure Ventilation Door (Balanced pressure ventilation door) is mainly used for underground outlet inlet lane and the main ...
Based on analysis of airflow movement under different longitudinal ventilation and downstream temperature distribution under ... the numerical simulation study on ventilation during fire in Zhongnanshan extra-long highway tunnel was carried out. ... fire, the effects obtained with different ventilation versions are evaluated. Comparing the results from numerical simulation ... Using the calculation method in fluid mechanics, the numerical simulation study on ventilation during fire in Zhongnanshan ...
Evaluation of explosion-resistant seals, stoppings, and overcast for ventilation control in underground coal mining ... Explosions in underground coal mines : risk assessment and control / by: Cheng, Jianwei, Published: (2018) ... Procedure for permitting the use of belt air to ventilate working sections of underground coal mines. Published: (2012) ... Strengthening existing 20-psi mine ventilation seals with carbon fiber-reinforced polymer reinforcement by: Weiss, E. S. ...
We offer high pressure tunnelling fans, axial jet fans, flexible ventilation ducting, pvc-coated fabric duct, high quality ... offers turnkey ventilation systems for large scale tunneling and mining projects all over the world. ... Swedfan Underground Ventilation provides a wide range of products to meet the needs of every customer. From initial design to ... Your supplier of complete turnkey Ventilation Systems. for underground construction since 1995. ...
The Brooks Underground Telegraph Cable. Starch Photo Plates. Sewer Ventilation in Berlin. ...
... Björling, Mikael Högskolan i Gävle, Akademin för teknik och miljö ... The indoor air climate of an underground train station was investigated during two days in January 2008. The underground ... Air from the outside could enter either via the ticket halls or via the train tunnels from ventilation towers situated on each ...
For at imødekomme dette tilpasses og justeres ventilation, strømforsyning og kontrol- og signalsystemer. London Underground ... London Underground (også kendt som the Underground eller the Tube) er et metrosystem, der betjener store dele af Storlondon og ... Becks Underground Map. London: Capital Transport. ISBN 1854141686.. *. Green, Oliver (1988). The London Underground: An ... "Underground History. Retrieved 31 May 2011.. *. Wolmar, Christian (2002). Down the Tube: the Battle for Londons Underground. ...
Atlas Copco offers a complete ventilation solution for tunneling and underground mining operations, including system design and ... Underground ventilation systems Atlas Copco offers a complete ventilation solution for tunneling and underground mining ... Ventilation systems. Atlas Copco offers a complete ventilation solution for tunneling and underground mining operations, ... Our Serpent Ventilation System has been tried and tested in hundreds of underground installations. The system is composed of ...
K40 Underground Mining Ventilation Fan/Axial Fans Type FOB Price: US $ 100-3000 / Piece. Min. Order: 1 Piece ... Ventilation Fan Turns in Underground Mine FOB Price: US $ 100-3000 / Piece. Min. Order: 1 Piece ... K40 Large Ventilation Fan for Mining Ventilation FOB Price: US $ 100-3000 / Piece. Min. Order: 1 Piece ... Mining Ventilation Explosion Proof Mining Ventilation Fan FOB Price: US $ 100-3000 / Piece. Min. Order: 1 Piece ...
Work continues at WIPP to increase underground ventilation. A bucket of dirt is lifted out of the utility shaft that is being ...
Elliott Ventilation Systems (EVS) is one of Australias leading underground ventilation ducting suppliers. All of EVSs ... Ventilation duct fittings. In addition to its range of standard ventilation duct and fittings available in six sizes, EVS also ... Ventilation ducting. EVS ventilation ducting is constructed of woven polyethylene fabric extrusion-coated with a low-resistance ... EVS can provide different styles of ventilation ducting, including straight lengths, reducing pieces, concertina lengths, bi- ...
Whenever the ventilation system has been shut down with all employees out of the underground area, only competent persons ... Mechanical ventilation shall be provided in all underground work areas except when the employer can demonstrate that natural ... Any structure located underground or within 100 feet (30.48 m) of an opening to the underground shall be constructed of ... The underground construction operation is both connected to an underground work area which is currently classified as gassy and ...
Canadian underground mining likely to take hydrogen ventilation lead - HySA By: Martin Creamer 6th April 2021 Canadian and ... By: Martin Creamer 26th March 2021 Two-part modernisation is under way at the Amandelbult underground platinum group metals ( ... Australian mines are big on wanting hydrogen ventilation in underground mining operations, and Canada will likely lead in the ... use of hydrogen underground. This is the view of Professor Dmitri Bessarabov, the director of the Department of Science and ...
Select 2017 high quality Underground Industry products in best price from certified Chinese Industry Supplies manufacturers, ... Flexible Ventilation Duct Manufacturer Featured Product. FOB Price: $10 - $16 / piece Min. Order: 1 piece ... Underground Copper Cable Factory Underground Electrical Cable Factory Pvc Underground Cable Factory Underground Xlpe Cable ... China Underground Fiber Optic Cable China Underground Heating Pipe Underground Telephone Cable Industry Sleeving Underground ...
Training courses in underground mine ventilation standards and practices. Changes in the Australian and International ... Ventilation audits and statutory compliance. It is essential for mines to maintain up-to-date ventilation records and the ... Mine Ventilation Australia (MVA) is a specialist consultancy in full-service mine and subsurface ventilation engineering, ... Mine Ventilation Australia. Mine and Subsurface Ventilation Consultancy Services, Mine Refrigeration and Training Courses ...
UNDERGROUND MINING; VENTILATION SYSTEMS; ALKANES; AUSTRALASIA; DEVELOPED COUNTRIES; HYDROCARBONS; MINING; ORGANIC COMPOUNDS; ... title = {Underground coal mining technology - the future}. author = {Lama, R P}. abstractNote = {Discusses development of ... Discusses development of underground coal mining in Australia in the last four decades. The following aspects are reviewed: ... underground coal mining in Australia in the last four decades. The following aspects are reviewed: technology for underground ...
UNDERGROUND FACILITIES; SPECIFIC HEAT; COOLING; HEAT GAIN; THERMAL INSULATION; FUNGI; VENTILATION; SPACE HVAC SYSTEMS ... Accelerated ventilation or slight artificial air-conditioning will solve the trouble. 1 refs., 7 figs.}. place = {Japan}. year ... It is also provided with a semi-underground room, to utilize heat capacity of soil for coolness in summer and warmness in ... It is also provided with a semi-underground room, to utilize heat capacity of soil for coolness in summer and warmness in ...
... and Underground Rail and Transit Operations details a quantitative risk assessment methodology for systemat ... Mine Tunnel Ventilation. Mine Tunnel Ventilation System Planning. Airways, Air Crossings, and Stoppings. Mine Tunnel Emergency ... Underground Transportation Logistic System. Pneumatic Capsule Pipeline for Underground Freight CargoCap. Underground Container ... Pipelines, Tunnels, Underground Rail, and Transit Systems Adjacent to Critical Assets. Pipelines, Tunnels, Underground Rail, ...
Insulation and Ventilation • Insulation Type and Level • Adequacy of Attic and Crawl Space Ventilation • Vent Fans Discharging ... Underground Oil TanksSlide 35 of 48 ...
The R1600H underground loader is designed to meet the challenges of the most demanding underground mining applications. Compact ... The Cat C11 engine features the optional Ventilation Reduction Package. The VR Package incorporates selective engine hardware ... The R1600H underground loader is designed to meet the challenges of the most demanding underground mining applications. Compact ... Cat underground loader buckets are available in two styles to meet a range of loading, hauling and dumping conditions. * Dump ...
... low cost-per-ton hauling in underground mining applications. Rugged construction and simplified maintenance guarantee long life ... The AD45B underground articulated truck is designed for high production, ... Engine, Ventilation Reduction (VR). - Tier 3. *Fast fill system. - Coolant. - Engine oil. - Fuel (dual tanks). - Hydraulic oil ... The AD45B underground articulated truck is designed for high production, low cost-per-ton hauling in underground mining ...
Underground Ventilation Operator Mastermyne Moranbah, QLD 2 days ago. Underground Ventilation Operator ...
A project to eliminate coal dust explosions in underground coal mines. * Improved Ventilation Effectiveness in Underground Coal ... A project to make recommendations and guide policy or program decisions regarding the safety of batteries used in underground ... A project to enhance worker safety by decreasing the likelihood of explosions that are produced by hazardous underground ...
  • Procedure for permitting the use of belt air to ventilate working sections of underground coal mines. (
  • Martin Creamer 6th April 2021 Canadian and Australian mines are big on wanting hydrogen ventilation in underground mining operations, and Canada will likely lead in the use of hydrogen underground. (
  • As part of our ventilation analysis services, MVA also provides assessments of the economic sizes of ventilation shafts and development, fan specification, tender adjudication and performance testing, evaluation of working conditions in terms of atmospheric contaminants, and feasibility and due diligence studies to help ensure mines are safely managed and properly planned for the future. (
  • It is essential for mines to maintain up-to-date ventilation records and the appropriate paperwork to ensure they sustain an excellent health and safety rating. (
  • MVA can help mine operators complete their ventilation audits and ensure mines follow statutory compliance in their operations. (
  • A project to eliminate coal dust explosions in underground coal mines. (
  • A project to make recommendations and guide policy or program decisions regarding the safety of batteries used in underground coal mines. (
  • The Zephyr AQS is a compact, low cost environmental air quality monitoring station for underground mines. (
  • Systems to continually monitor gas composition in underground mines have become commonplace over the last decade. (
  • As this mine has relatively low radon levels, the results are highly relevant for risk estimation in non-uranium underground mines. (
  • In underground mines, it can create an explosive hazard to coal miners, so it is removed through ventilation systems. (
  • Degasification systems at active underground mines . (
  • Closed mines produce emissions of low- to medium-quality gas from diffuse vents, ventilation pipes, boreholes, or fissures in the ground. (
  • Coal dust and float coal dust, produced during normal mining operations, in underground coal mines, are carried from the point of origin downstream by the ventilating air, where it deposits on the surfaces of the mine entry. (
  • To provide insights into and assistance for the optimization of ventilation systems for U.S. underground coal mines facing both methane control and spontaneous combustion issues, a computational fluid dynamics (CFD) study is being conducted to investigate the effect of the ventilation scheme on preventing spontaneous combustion in longwall gob areas. (
  • This chapter discusses respirable dust control in underground hard-rock mines. (
  • For the most part, dust in hard-rock mines is control led with ventilation air, water sprays, and dust collectors. (
  • The ability to circulate underground air so that humans can work inside of mines for extended periods of time with good-quality and breathable air is essential. (
  • Mechanized underground mines suffer from noise overexposure. (
  • The Mount Isa Underground Hospital, constructed during March/April 1942 in the grounds of the Mount Isa District Hospital, was built by off duty miners from Mount Isa Mines. (
  • Construction work was supervised by Wally Onton, Underground Foreman at Mount Isa Mines. (
  • Vuma is the developer of a suite of products for the simulation of steady-state environmental conditions encountered in underground mines. (
  • By enabling detailed design, survey and operational data to be transferred to Vuma software, Maptek says the accuracy, efficiency and speed of analysis and planning will be enhanced in terms of ventilation and refrigeration in underground mines. (
  • This tool calculates a mine's violation rate for 9 key health and safety standards for underground coal mines, as identified in MSHA's Part 75 Exam Rule requiring examinations and recordkeeping by mine operators. (
  • This refers to the very dilute methane that is released from underground mine ventilation shafts. (
  • The focus of major underground development programs continued to be underground lateral development, sinking of Shafts 2 and 5, support infrastructure and the convey-to-surface system, which all progressed during Q1'17. (
  • The following table outlines the shafts for underground development as of March 31, 2017. (
  • Available mine ventilation strategies and methane control systems have been challenged by recent developments in mining methods and designs, such as increased face advance rates, increased productivities, increased longwall panel sizes, and by possible interactions of a sealed area in a previously mined working above and below the current operation. (
  • Determine the interactions involved in methane emissions from sealed gobs which, under decreasing atmospheric pressure, can discharge large quantities of gob gas, including methane-rich air, into ventilation systems. (
  • Moreover, as the underground operations are continuing to develop to greater depths, the associated issues with the ventilation systems such as the heat load and airborne contaminants are becoming more important. (
  • Your supplier of complete turnkey Ventilation Systems for underground construction since 1995. (
  • Elliott Ventilation Systems (EVS) is one of Australia's leading underground ventilation ducting suppliers. (
  • Communication systems shall be tested upon initial entry of each shift to the underground, and as often as necessary at later times, to ensure that they are in working order. (
  • Risk Assessment and Security for Pipelines, Tunnels, and Underground Rail and Transit Operations details a quantitative risk assessment methodology for systematically analyzing various alternatives for protecting underground rail, oil and gas pipelines, pipeline freight transportation, and other tunnel systems from terrorism threats and other disasters. (
  • Using pipelines, tunnels, underground rapid rail, and transit systems as examples, it maintains an emphasis on applying quantitative psychology to risk management in the areas of homeland security and defense. (
  • This makes the energy costs associated with ventilation systems very high, which in turn has created a trend toward sealing unused sections of the mine and changing from diesel to electric machines. (
  • Mine ventilation management systems are rarely a simple amalgam of gas analysis technology and supporting instrumentation. (
  • Real-time gas monitors, extractive gas analysis (tube bundle) systems and gas chromatographs ensure the ventilation management team has access to dependable accurate information. (
  • Also commonly referred to as drainage systems, these systems employ vertical and/or horizontal wells to recover methane before mining takes place to help the ventilation system keep the in-mine methane concentrations sufficiently low (well below the explosive limit) to protect miners. (
  • 500,000 for sprinkler and ventilation systems and other health-related projects. (
  • This paper focuses on the flow patterns within the gob under three different ventilation systems: one-entry and two-entry bleederless systems, as well as a three-entry bleeder system. (
  • On safety systems for underground car parks. (
  • Constructing the two new vent plants required extensive underground utility relocation and restoration, design and installation of excavation support systems (steel sheeting) and roadway decking, soil stabilization, concrete and steel construction and extensive mechanical, electrical and plumbing components. (
  • DAMOS ventilation systems are manufactured utilising the highest quality Polyethylene and PVC fabrics and can be individually designed to meet your specific requirements. (
  • A mine ventilation engineer works together with mine design engineers to develop systems for air circulation. (
  • Additionally according to mine ventilation engineers use several types of equipment and tools to help measure the air quality inside of a mine which helps to determine and evaluate how well an existing mine ventilation system is working or to figure out what types of upgraded ventilation systems are needed. (
  • Depending on the test results mine ventilation engineers either decide to use and possibly upgrade existing systems or they plan for the installation of new and improved ventilation systems. (
  • A successful mine ventilation engineer must not only be skilled at developing andor designing mine ventilation systems but they must also constantly keep the safety and health of the miners as a top priority. (
  • Designs mine ventilation systems. (
  • Ensures that ventilation systems are in proper working order. (
  • Positive pressure ventilation systems Positive pressure/roof cavity ventilation systems are the most common type available in New Zealand. (
  • [10] The gas is released into mine ventilation systems to alert mine workers during an emergency. (
  • Systemair ventilation systems prove performance already during construction of the tunnel by supplying the building site with fresh air. (
  • Later our ventilation systems control the air quality in the tunnel. (
  • Much greater control can be achieved with mechanical ventilation systems. (
  • Since the first Symposium in 1982, the UVC has sought to provide mine ventilation engineers and technicians in the underground coal, metal, and industrial mineral mining industry with the latest information and operating practices from the field and promote the exchange of ideas and research in a variety of related areas to include the monitoring of air contaminants, determining fresh air requirements, and producing power efficient ventilation and cooling systems. (
  • Underground trains are among the most widely used public transport systems in cities worldwide. (
  • Air from the outside could enter either via the ticket halls or via the train tunnels from ventilation towers situated on each side of the platform area. (
  • Its implementation was completed in South Dakota in September 2016, nearly a mile underground at the Sanford Underground Research Facility. (
  • Following signing of the Oyu Tolgoi Underground Mine Development and Financing Plan (Underground Plan) in May 2015 and the signing of a $4.4 billion project finance facility in December 2015, Oyu Tolgoi received the formal notice to proceed approval by the boards of Turquoise Hill, Rio Tinto and Oyu Tolgoi LLC in May 2016, which was the final requirement for the re-start of underground development. (
  • Underground construction recommenced in May 2016. (
  • Proceedings of the 11th U.S./North American Mine Ventilation Symposium, University Park, Pennsylvania, June 5-7, 2006. (
  • The North American Mine Ventilation Symposium is organized by the Underground Ventilation Committee (UVC) of the Society for Mining, Metallurgy and Exploration. (
  • Vuma software is developed for the analysis of underground mine ventilation, contaminant tracking, refrigeration and cooling networks. (
  • An auxiliary ventilation system takes air from the flow-through system and distributes it to the mine workings via temporarily mounted ventilation fans, Venturi tubes and disposable fabric or steel ducting. (
  • Atlas Copco offers a complete ventilation solution for tunneling and underground mining operations, including system design and installation of fan stations and ducting. (
  • EVS ventilation ducting is constructed of woven polyethylene fabric extrusion-coated with a low-resistance film. (
  • EVS can provide different styles of ventilation ducting, including straight lengths, reducing pieces, concertina lengths, bi-vent lengths and bi-vent transition pieces. (
  • In order to facilitate airflow in the subway tunnel, the project team will be installing approximately 115 natural ventilation dampers along the 1 and 9 subway line street grating. (
  • Hazards of dust and gaseous contamination of mine atmosphere, air dilution requirements, flow distribution in mine network, computer analysis of the ventilation network, natural ventilation and fans. (
  • Natural ventilation results from thermal effects, such as those from a flue, or may be caused by wind, or both. (
  • The volume (expressed in cubic feet per minute or cubic meters per second) of air required to ventilate an underground mine is determined by mining engineers based on a wide variety of parameters. (
  • In this project, three tasks were performed to advance the understanding of methane sources, migration and control strategies, interactions of sealed and active gobs with working sections, and to improve ventilation methods through a complete understanding of bleeder system effectiveness to enhance worker safety. (
  • The ventilation system is a key factor in the design of such spaces. (
  • Analyses the feature and cardinal principle of the no-duct inductive ventilation system. (
  • Our Serpent Ventilation System has been tried and tested in hundreds of underground installations. (
  • Let Serpent Ventilation System help you! (
  • It provides a residential space throughout the year, with no artificial heating or air-conditioning system, naturally ventilated with air taken into the underground room and released out of a triangular shape on the roof. (
  • A project to develop effective measures to prevent hot surface ignitions on mining equipment, improve fire suppression techniques, and develop a diagnostic tool to determine the effect of mine fires on a mine's ventilation system. (
  • Numerical simulation (CFD code) was used to optimise the design of the ventilation system of a large underground bus terminal complex near Seoul (Korea). (
  • Uncontrolled airflows in a ventilation circuit can severely compromise any ventilation system, regardless of its capacity. (
  • However, this does not capture conditions within a ventilation system that can dynamically change at any moment, having a detrimental effect on the system. (
  • This system could activate a rock-dusting machine that disperses rock dust into the ventilation air when dangerous deposits accumulate and deactivate the machine when sufficient inert has been deposited on top of the coal dust. (
  • Additionally when an emergency with a mine ventilation system arises a mine ventilation engineer must be able to make quick decisions and come up with innovative solutions to problems as they occur. (
  • In addition to the role of ventilation in the safety of your operations, our team understands the interdependency between a mine's ventilation system and achieving your mine's production goals. (
  • Spend only as much of financial resources, engineering, installations, automation and maintenance, to meet the demand on high efficient automated controlled ventilation system. (
  • Rescuers had since piped wind and dripped water through the ventilation system to help the miners survive. (
  • Caltrain can be electrified, but diesel freight trains would need some sort of ventilation system in order to run underground. (
  • The results show that even though the existence of the baffle improves the cavity ventilation performance at low Richardson numbers, it has a negative impact at high Richardson numbers. (
  • The hazards of poor ventilation were not clearly understood until the early 20th century. (
  • A project to improve the capabilities to detect changing ventilation conditions along a longwall face arising from poor roof caving characteristics and increasing face length. (
  • The single stack solution with the Studor P.A.P.A. and AAVs is an ideal solution for high-rise applications, eliminating the need for roof penetrations and secondary ventilation. (
  • Sufficient volume of air is required for proper ventilation. (
  • Dreadful explosion for want of proper ventilation by: Martin, Wm. (
  • Performance of a new fan silencer prototype for auxiliary ventilation. (
  • Based on analysis of airflow movement under different longitudinal ventilation and downstream temperature distribution under fire, the effects obtained with different ventilation versions are evaluated. (
  • Using the calculation method in fluid mechanics, the numerical simulation study on ventilation during fire in Zhongnanshan extra-long highway tunnel was carried out. (
  • Another has Caltrain following its current path while the high-speed trains run underground, whether in a tunnel or trench. (
  • Air enters the mine from surface via a shaft, ventilation raise or adit. (
  • Practical knowledge of computational tools used in mine design projects for both underground and surface mining, including a programming language and geology/mining modeling software. (
  • Principles of underground excavations designs related to metallic, coal and industrial mineral deposits including underground mine layouts, stability of the underground excavations, material handling and drainage control. (
  • The Marley HDPE drainage range is certified to BS EN 1519: 2000 (licence number KM 545820) The HDPE range offers an alternative solution to cast iron. (
  • Den første dybtliggende tube -bane, City and South London Railway , to cirkulære tunneller med en diameter på 3,10 m, blev udgravet mellem King William Street (nær nutidens Monument Station ) og Stockwell under vejene for at undgå aftaler med ejerne af ejendommene på overfladen. (
  • The two fans were 34-inch diameter ventilation fan in both refurbished and worn conditions. (
  • In order to become a mine ventilation engineer a bachelor's degree with a major in the field of engineering must be achieved. (
  • We can't find any apprenticeship vacancies in England for a Heating and ventilation engineer right now. (
  • Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove dust and noxious gases (typically NOx, SO2, methane, CO2 and CO) and to regulate temperature. (
  • roadheader dust control and how much ventilation air to use. (
  • Good dust control practices will reduce overall mine ventilation requirements. (
  • The results of a NIOSH study, to quantify the respirable dust and respirable silica exposures of roofing workers using an electric powered saw with an aftermarket local exhaust ventilation attachment. (
  • The study was conducted to determine whether the local exhaust ventilation attachment was able to control respirable dust and respirable silica exposure below occupational exposure limits. (
  • Exposure to metal-rich dust in underground railways harm people, finds study. (
  • Ill-ventilated underground railway stations are the ideal environment for toxic dust particulates to get accumulated. (
  • Numerical study on impluse ventilation for smoke control in an underground car park. (
  • The ultimate goal of this research project was to provide recommendations to the industry and regulatory agencies for improved monitoring and sampling methods, optimized face and bleeder ventilation techniques, and enhanced methane control designs to prevent any future mine explosion disasters. (
  • The employer shall control access to all openings to prevent unauthorized entry underground. (
  • In extreme cases special water doors and underground chambers must be constructed in order to control sudden large inflows. (
  • A typical mine ventilation circuit offers a variety of tools to enable the control of the underground environment. (
  • To discuss the applications of common techniques to control the efficiency and costs of underground ventilation, detailed information on current practices is collected through discussions with miners to identify relevant problems. (
  • Studies of underground miners have documented an increased risk of lung cancer mainly linked to radon exposure but possibly influenced by other concurrent exposures. (
  • The main implication of the results is for interpretation of the dose-response curve for radon and lung cancer in underground iron ore miners. (
  • Experiments were conducted in a testing chamber with floor heating or heating by a hot water radiator, with steps in hot water and ventilation flow rates. (
  • No Pressure Ventilation Door (Balanced pressure ventilation door) is mainly used for underground outlet inlet lane and the main outlet inlet air lane between each contact, which is the substitute for all air door. (
  • TLT ACTOM will be supplying a turnkey ventilation solution to Newmont Mining Corporation's Subika Mine based at the Ahafo complex in Ghana. (
  • Water comes from underground boreholes, pumped using solar power. (
  • Efficient performance of ventilation fans, airways and flow regulators is essential. (
  • The gas flow in the caved gob area is simulated as a laminar flow through porous media, while the gas flow in ventilation airways is simulated as a fully developed turbulent flow. (
  • The largest component of the operating cost for mine ventilation is electricity to power the ventilation fans, which may account for one third of a typical underground mine's entire electrical power cost. (
  • This paper presents a computational fluid dynamics simulation to examine the effects of the baffle on the air flow field and the heat transfer rate in a space located beneath a ventilation channel. (
  • The computational model consists of a two-dimensional channel equipped with a thin baffle hanging from the top wall and a cavity located underneath simulating the underground space. (
  • Computational fluid dynamics study on the ventilation flow paths in longwall gobs. (
  • Mine Ventilation Australia (MVA) is a specialist consultancy in full-service mine and subsurface ventilation engineering, providing services to clients worldwide. (
  • Volodymyr Bondarenko is a famous specialist in the field of underground mining of coal and ore deposits and author of a scientific discovery in mining providing new fundamental knowledge describing artificial diagenesis of sedimentary rocks and their influence on rock massif state around openings. (
  • However, in some developing countries the mandated ventilation requirement may be insufficient, and the mining company may have to increase the ventilation flow, in particular where ventilation may be required to cool the ambient temperature in a deep hot mine, however auto-compression must also be taken into account. (
  • In addition to the obvious requirement of providing fresh air for those working underground, there are other demands. (
  • While some mine ventilation engineers choose to obtain a post graduate degree it is usually not a requirement for this profession. (
  • According to mine ventilation engineers typically earn a median salary of about $64690 per year. (
  • Reliable high-pressure fans and durable PVC-coated ducts contribute to optimal underground airflow, day in and day out. (
  • One of our most important roles when ventilating an underground mine worker safety: making sure airflow is sufficient in quantity and quality. (
  • It will allow mine survey and design data to be used in ventilation and cooling analysis, without replication of data, and ensure [that] accurate, current representations of the mine surface can be applied to ventilation planning," says Venter. (
  • LPTB var en fremtrædende protektor indenfor kunst og design, der bestilte mange nye stationsbygninger, plakater og offentlige kunstværker i modernistisk stil. (
  • To facilitate collabo- ration and cooperation around mine ventilation solutions and mine design, a memorandum of understanding has been signed by mining software, hardware and services provider Maptek and engineering consultancy Bluhm Burton Engineering subsidiary Vuma. (
  • Further, Maptek notes that Vulcan software provides advanced underground mine design, planning and scheduling tools. (
  • Longwall mining of coal is discussed in greater detail in coal mining: Underground mining . (
  • Accelerated ventilation or slight artificial air-conditioning will solve the trouble. (
  • Artificial ventilation bag line icon. (
  • The average cumulative exposure in underground workers was 32 kBq year/m 3 h (65 working level months (WLM)), experienced over 14.6 years. (
  • Noise levels are often above the Permissible Exposure Limit (PEL) where underground fans are used. (
  • MVA offers a complete package of mine ventilation services to ensure all factors are properly monitored and optimised to ensure health and safety targets, and more importantly the health and safety of the workers, are met. (
  • Dr Edward Ryan contacted Vic Mann, MIM Mine Superintendent, who offered the co-operation of the company and the services of Underground Foreman Wally Onton to supervise the project. (
  • To enhance worker safety by decreasing the likelihood of explosions that are produced by hazardous underground methane concentrations. (
  • Ventilation pipes near a bus stop in Denver, Colorado, USA. (
  • The air is distributed through the mine via internal ventilation raises and ramps, and flows are controlled by regulators and permanently mounted ventilation fans. (
  • The employer shall establish and maintain direct communications for coordination of activities with other employers whose operations at the jobsite affect or may affect the safety of employees underground. (
  • Ventilation is a safety imperative for any mining operation. (
  • The monitoring of air velocity in single or multiple locations within a mine will clearly identify faults within a ventilation circuit, enabling a response before significant effects on personnel safety, productivity and profitability. (
  • Completed or unused sections of the underground facility shall be barricaded. (
  • For active pollutants and when a large volume of all fresh air is supplied, displacement ventilation has better performance. (
  • Mine ventilation must be planned precisely, with performance carefully monitored to enable continued improvement. (
  • Handheld anemometers used during ventilation surveys provide data that must be aggregated to provide an overall picture of ventilation performance. (
  • In addition, when explosives are used to break hard rock , ventilation air carries away and dilutes the gases produced. (
  • Discusses development of underground coal mining in Australia in the last four decades. (
  • misc{etde_5656435, title = {Underground coal mining technology - the future} author = {Lama, R P} abstractNote = {Discusses development of underground coal mining in Australia in the last four decades. (
  • Wind effects on smoke motion and temperature of ventilation-controlled fire in a two-vent compartment. (
  • The demand controlled ventilation is a powerful instrument to influence many aspects of room climate quality like temperature, pressure, humidity, CO 2 or particles content and others. (
  • All of EVS's ventilation duct is professionally manufactured from woven polyethylene with emphasis on quality, strength and durability. (
  • An underground porosity reservoir includes substantially impermeable barriers and an aquiclude surrounding a volume of alluvial deposits for storing water within the pore spaces of the alluvial deposits. (
  • The amount of water encountered in underground mining operations varies greatly, depending on the type of deposit and the geologic setting. (
  • The longest previously known underground water channel of the antique world -- in Bologna -- is only 19 kilometers long. (