• These sequences, comprising RF pulses and timed delays, target specific nuclei and deliver insights on molecular structure, dynamics, and molecule diffusion. (nmr-nl.org)
  • since separate systems use different frequencies, antennas can be located close together without interfering with each other. (wikipedia.org)
  • When developing modules with internal antennas providing large bandwidth and good radiation characteristics, it is also important to consider how the modules are placed on the carrier board. (u-blox.com)
  • POCUS can effectively image fluid buildup around the lungs, and pneumonia and fluid congestion in the lungs, as a non-radiating alternative to chest x-rays and the ionizing radiation used in computed tomography (CT) scans. (vchri.ca)
  • Machine learning algorithms from computer vision can serve as a pair of virtual eyes that tirelessly processes these images, automatically detecting and identifying microstructures. (springer.com)
  • This review paper identifies the key achievements reflected in the performance measurement metrics of the applied algorithms in the three diagnosis processes. (researchgate.net)
  • This approach generalizes across different modalities, including serially-sectioned scanning electron microscopy (sSEM) of genetically labeled and contrast enhanced processes, spectral confocal reflectance (SCoRe) microscopy, and high-energy synchrotron X-ray microtomography ( μ CT) of large tissue volumes. (springer.com)
  • Conventional mechanical Fourier transform spectrometers (FTSs) measure absorption and dispersion spectra of gas-phase samples with very long measurement times to obtain time-resolved spectra with a good spectral resolution. (mdpi.com)
  • Here, we present a mid-infrared dual-comb-based FTS providing broadband absorption and dispersion spectra with a spectral resolution of 5 GHz, a temporal resolution of 20 μs, and a wavelength coverage of 300 cm −1 in a measurement time of a few minutes. (mdpi.com)
  • The raised structure typically supports antenna[clarification needed] and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiver for timing (for CDMA2000/IS-95 or GSM systems), primary and backup electrical power sources, and sheltering. (wikipedia.org)
  • Furthermore, the receiver detects and records the signals emitted by the aroused nuclei. (nmr-nl.org)
  • Because "untethered" is not a widely used term, this report concentrates on "wireless" communications systems that use the radio frequency (RF) part of the electromagnetic spectrum. (nationalacademies.org)
  • Maxima is one of the oldest computer algebra systems in existence, its origins dating back to the 1960s. (vttoth.com)
  • 4 Synthetic Biological Devices and Systems The ia included with waves and periods classifying from neutropenic field and small Figure( group) careers are functional to the frequencies generated with GMOs and rDNA pseudocode. (plywoodskyscraper.com)
  • Computer systems or networks designed to provide radiographic interpretive information. (lookformedical.com)
  • The first systems introduced used cesium iodide (CsI) phosphors to absorb the x-rays and produce light, and either photodiodes or charge coupled devices (CCDs) to convert the light to an electronic signal that could be digitized. (axisimagingnews.com)
  • Mathematical modeling of signals and systems. (berkeley.edu)
  • Frequency domain models for signals and frequency response for systems, and sampling of continuous-time signals. (berkeley.edu)
  • The thesis work will include technical studies, calculations, design simulations and measurements of prototypes. (u-blox.com)
  • Currently, NIOSH is working on several studies related to cabin air quality and assisting CDC in the development of computer simulations to determine how diseases are transmitted in cabins, the creation of an informative video on SARS to be shown on flights from affected areas, and the effects of cosmic radiation exposure on flight crews. (cdc.gov)
  • In this It selects and retrieves instructions from the main memory in proper sequence and interprets them so as to activate the other functional elements of the system at the appropriate moment, a computer consists of a control unit, an arithmetic logic unit (ALU), a memory unit, and input/output (I/O) controllers. (fusodavao.com)
  • Within biochemistry, NMR has proven invaluable in unraveling the intricacies of protein structures, dynamics, and interactions, thereby assisting in the creation of new drugs. (nmr-nl.org)
  • Students will engage in laboratory experiments and learn how to conduct measurements including voltage, current, impedance, waveform, and frequency/spectrum analysis. (uta.edu)
  • As the twenty-first century approaches, technical capabilities have become so sophisticated that stationary telephones, facsimile (fax) machines, computers, and other communications devices connected by wires to power sources and telecommunications networks are almost ubiquitous in many industrialized countries. (nationalacademies.org)
  • 8. Assists with development of manufacturing, assembly, and fabrication processes of lasers, masers, infrared, and other light-emitting and light-sensitive devices. (occupationalinfo.org)
  • This technique involves using lasers and lenses to create a light sheet which illuminates tracer particles within a plane and cameras capable of capturing particles to obtain high resolution images within small time frames. (berkeley.edu)
  • 10. Directs testing and monitoring of contamination of radioactive equipment and recording of personnel and plant area radiation exposure data. (occupationalinfo.org)
  • Specific topics of current interest include developing distributed resource allocation techniques for wireless networks, dynamic spectrum sharing and wireless spectrum policy, understanding the role of incentives in network security and modeling learning and adoption in social networks. (ins-netgroup.com)
  • Electromagnetic radiation is used to create an image of the subsurface through the electromagnetic energy that the transmitters emit. (architecturesideas.com)
  • Changes are detectable through the electromagnetic energy and high-frequency radio waves. (architecturesideas.com)
  • The two-way travel-time (TWT) is what is referred to as the period between the transmission of the electromagnetic waves and their return or reception back to the antenna. (architecturesideas.com)
  • All the cell phones within a cell communicate with the system through that cell's antenna, on separate frequency channels assigned by the base station from a common pool of frequencies used by the system. (wikipedia.org)
  • When a mobile user moves from one cell to another, their phone is automatically "handed off" to the new cell's antenna, and assigned a new set of frequencies, and subsequently communicates with this antenna. (wikipedia.org)
  • Each cell phone has an automated full duplex digital transceiver and communicates with the cell antenna over two digital radio channels in the UHF or microwave band, one for each direction of the bidirectional conversation, plus a control channel which handles registering the phone with the network, dialing, and the handoff process. (wikipedia.org)
  • It will depend on a number of factors, including, but not limited to: Height of antenna over surrounding terrain (Line-of-sight propagation). (wikipedia.org)
  • Not only does this meet the FCC requirements for a change, but it also gives you a indication of whether your transmitter and antenna are radiating properly - meeting both the minimum radiation efficiency for the class of station, as well as the published radiation in the FCC records. (thebdr.net)
  • The frequency of the antenna correlates to the penetration depth of the ground. (architecturesideas.com)
  • The frequency of the antenna is fundamental to the design of the GPR survey and the data desired. (architecturesideas.com)
  • The wavelengths emitted by the radar and the frequency of the antenna are the two components that can highly affect the accuracy of the data. (architecturesideas.com)
  • The goal of this topic is to study different antenna concepts and compare the performance for extended bandwidth covering the frequency bands for Wi-Fi and UWB in the frequency range from 5 GHz to 9GHz. (u-blox.com)
  • NMR spectroscopy, the experimental process tied to NMR, produces valuable data by having atomic nuclei interact with a magnetic field. (nmr-nl.org)
  • The data demonstrated a short learning duration (12-13 cases) and a moderate learning process (~15min time increase compared to later cases) upon adoption of the CAOS system, without high sensitivity to surgeon's experience level. (easychair.org)
  • A unique feature is the program's ability to incorporate a dynamical model of on-board generated forces due to heat radiation, computed from telemetry data. (vttoth.com)
  • I would be remiss if I did not point out that at this stage you will want to save any existing data in your GPS off to a computer and flush all user data from it. (thebdr.net)
  • Controls sequential instruction execution Interprets instructions Guides data flow through different computer areas Regulates and controls processor timing Sends and I have also written and compiled some articles on computers and telecommunications, and please go through them. (fusodavao.com)
  • There are many thousands of ES logged onto various data bases and we all know what worsens the condition, it is such a simple process of elimination. (twoday.net)
  • Cioffi's research interests were in the theory of transmitting the highest possible data rates on a number of different communications channels, many of which efforts were spun out of Stanford through he and/or his many former PhD students to companies, most notably including the basic designed used worldwide on more than 500 million DSL connections. (ins-netgroup.com)
  • A lower frequency is required to reach greater depths although there is the possibility that the data may not be as accurate because the signal has a greater room to scatter. (architecturesideas.com)
  • Abstract The ever-growing available visual data (i.e., uploaded videos and pictures by internet users) has attracted the research community's attention in the computer vision field. (techscience.com)
  • The analysis and documentation of simulation results and measurement data of prototype performance will be included in the thesis studies. (u-blox.com)
  • Community-level demographics were included from U.S. Census data. (cdc.gov)
  • Data from the 2001-2002 and 2003-2004 cycles are not available through the RDC, and at this time, there is no timeline to release them. (cdc.gov)
  • Data from NCHS are made available to the public in a number of individual reports and publication series, special tabulations, data releases, and through electronic media including data diskettes and an extensive set of public-use data files. (cdc.gov)
  • The measures taken to protect confidential information include the following: -Personal names and addresses, except for those on some nonconfidential institutional records, never appear on the data tapes. (cdc.gov)
  • In addition, all purchasers of NCHS data files are required to sign a data use and purchase agreement (included on the NTIS order form) to assure that the NCHS public-use data files will be used solely for statistical research or reporting purposes. (cdc.gov)
  • It should also include a disclaimer that credits any analyses, interpretations, or conclusions reached by the author (recipient of the file) and not to the Center, which is responsible only for the initial data. (cdc.gov)
  • Users are urged to include appropriate sampling error statements in all data they publish. (cdc.gov)
  • Empower, Inspire and Elevate The processes of discovery, research and development, technological innovation and education no longer rely only on first-principles, model-based methods that have been developed over the last three centuries. (issuu.com)
  • Resource management in multi-tier and drone-assisted cellular wireless networks. (ins-netgroup.com)
  • While a large number of patients with pulmonary metastases are asymptomatic at the time of diagnosis, some patients develop symptoms such as hemoptysis, cough, shortness of breath, chest pain, weakness, and weight loss. (medscape.com)
  • Patients with lymphangitic carcinomatosis present with respiratory dysfunction, including severe dyspnea. (medscape.com)
  • RESULTS: The study included 15 352 (84%) English-only patients, 1744 (10%) patients with limited English proficiency, and 1147 (6%) bilingual patients. (cdc.gov)
  • Patients with thymoma may experience dysregulation of the lymphocyte negative and positive selection process leading to abnormal proliferation, autoimmunity, and/or immunodeficiency. (medscape.com)
  • In addition to these autoantibodies, patients with thymoma-associated MG produce autoantibodies to various neuromuscular antigens, including antibodies to the skeletal muscle calcium release channel (ryanodine receptor of sarcoplasmic reticulum) and antibodies to cytoplasmic filamentous proteins (particularly titin) or neurofilaments. (medscape.com)
  • The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality. (lookformedical.com)
  • This study employed an advanced method (CUSUM) to analyze the learning curve regarding surgical efficiency (time) in 10 surgeons from different experience levels upon their adoption of a contemporary CAOS TKA system. (easychair.org)
  • Thus, there is a crucial need for computer-aided methods with better accuracy for early tumor diagnosis. (researchgate.net)
  • Computer-aided brain tumor diagnosis from MRI images consists of tumor detection, segmentation, and classification processes. (researchgate.net)
  • Tomography using x-ray transmission and a computer algorithm to reconstruct the image. (lookformedical.com)
  • Our non SCI work includes an EMG control algorithm for an artificial larynx replacement and studies, in healthy volunteers, on the metabolic impact of electrical stimulation. (gla.ac.uk)
  • At the same time, they feature sensitivity equivalent to that of SQUIDs. (wikipedia.org)
  • The essential problem of biomagnetism is, thus, the weakness of the signal relative to the sensitivity of the detectors, and to the competing environmental noise. (wikipedia.org)
  • A Berkeley Electrical Engineering and Computer Sciences degree opens the door to many opportunities, but what exactly are they? (berkeley.edu)
  • Certain services require working electrical system, cell reception and GPS signal. (onstar.com)
  • 1c * Connected vehicle services vary by vehicle model and require active service plan, working electrical system, cell reception and GPS signal. (onstar.com)
  • Assists in making electrical repairs. (occupationalinfo.org)
  • In addition, there are ample military uses for such a system, such as controlling entry into secure or sensitive areas and the verification of parts, such as computer chips, purchased by the government. (nsf.gov)
  • A system for verifying and maintaining a desired level of quality in a product or process by careful planning, use of proper equipment, continued inspection, and corrective action as required. (lookformedical.com)
  • Type B. In this system, a CsI phosphor is coupled through fiberoptic plates to CCDs, which convert the light to an electronic signal and provide a readout. (axisimagingnews.com)
  • The control unit is responsible for regulating all the significant tasks and operations given to them by the computer system. (fusodavao.com)
  • By creating a certain collection of signals at every system clock beat, a controller generates the instructions to be executed. (fusodavao.com)
  • We are still in the process of developing and testing the jet system, but once this is complete, fluorescent dye will be used so that we are able to capture images of the turbulent jet. (berkeley.edu)
  • These questions were asked, in the home, by trained interviewers using the Computer-Assisted Personal Interview (CAPI) system. (cdc.gov)
  • SG 31/07, in force from 13.04.2007) The national system of health care shall include the medical establishments under the Law for the medical establishments, the health establishments under this law and the Law for the medicinal products in the human medicine, as well as the state, municipal and public bodies and institutions for organisation, management and control of the activities related to preservation and strengthening of health. (who.int)
  • This non-invasive, zero-radiation technique emits high-frequency sound waves through a probe placed on a patient's body. (vchri.ca)
  • The sound waves bounce off a patient's internal tissues and organs, which are then displayed as images on a tablet, computer or smartphone screen. (vchri.ca)
  • The ground-penetrating radar GPR works by sending out high-frequency waves. (architecturesideas.com)
  • High-frequency waves are used by the ground-penetrating radar and the frequency of this ranges from 10 MHz to 2/6 GHz. (architecturesideas.com)
  • The product catalog provides salespeople with a portable version of the company's entire product database and includes product images, rich text product descriptions, technical specifications, and engineering drawings. (vttoth.com)
  • The process of generating three-dimensional images by electronic, photographic, or other methods . (lookformedical.com)
  • For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object. (lookformedical.com)
  • Manually evaluating the numerous magnetic resonance imaging (MRI) images produced routinely in the clinic is a difficult process. (researchgate.net)
  • The research, built on basic concepts in optical physics, involves innovative ways to address problems in security, credit cards, identification cards, protection of computer chips, etc. (nsf.gov)
  • Treatment of breast cancer depends on type of cancer and the stage and involves chemotherapy , radiation or surgery. (healthresource4u.com)
  • The optoelectronic board involves that hazardous job does to be practicing, or to Subscribe and be Direct detectable needs and priorities that are respectively modulated in intent, and, as Several, including the bipolar distances granted with requirements of mammalian reliability controls also more exciting. (plywoodskyscraper.com)
  • Furthermore, the application of new devices, including smartphones and drones, in railway inspection and their potential capabilities are discussed. (ukm.my)
  • Semiconductor devices including diodes and MOSFETS and their IV characteristics are covered. (berkeley.edu)
  • After semi-automatic signal segmentation had been applied to isolate flexion and extension cycles, features based on relative high-frequency components were generated. (easychair.org)
  • of tumor detection, segmentation, and classi fi cation processes. (researchgate.net)
  • The methods and atmospheric people of the InfectionBleb-related numbers, discussions, or orbits with which factors will be including( martial or Specifically coming) so have to have explained gained that main and musical problems will each thereMay exhibit both portable and viscoelastic engines. (plywoodskyscraper.com)
  • Essential to geriatric rehabilitation is communication, specifically improving any sensory impairment, including those related to vision and hearing. (medscape.com)
  • the low power radio signals used within each cell do not travel far beyond the cell, so the radio channels can be reused in geographically separated cells. (wikipedia.org)
  • The Board also will hear from invited guests, including IARU President Larry Price, W4RA, and Radio Amateurs of Canada President Bill Gillis, VE1WG. (arrl.org)
  • This project is designed to synergise with the project "Monster Black Holes at the Dawn of Time" by finding less radio luminous and/or unobscured SMBHs. (edu.au)
  • Distortion is a classic problem encountered during the welding process which always occurs in welding processes. (ukm.my)
  • The objective of this work is to investigate effect of various processes of Shielded Metal Arc Welding (SMAW) on angular distortion in low carbon steel weld joints. (ukm.my)
  • The Jahn-Teller distortion arising due to transition metal ions has been noted to induce low-symmetric geometric distortions by promoting degenerate electronic states, which in turn leads to intriguing properties including lattice distortion and high mechanical softness 17 , 18 . (nature.com)
  • The cytokines involved in thymocyte development and selection include interleukin (IL)-1, IL-2, IL-3, IL-4, IL-6, and IL-7. (medscape.com)
  • This phenomenon of resonance happens at a specific frequency, dictated by the magnetic field's strength and the atomic nucleus' properties studied. (nmr-nl.org)
  • His comments generated strong criticism from liberal groups, including the Hiddush religious pluralism organization, which called free cheats the position of chief rabbi to be abolished. (250grados.net)
  • Invasive squamous and glandular where the excision is performed at the including radiological examination to lesions first diagnostic colposcopy visit, assess the extent of invasion within the The World Health Organization classi- depends on expert assessment of the cervix and its surroundings. (who.int)
  • A number of signals generated by the control signal generator matrix are sent back to inputs of the next control state generator matrix. (fusodavao.com)
  • The download Windows для профессионалов (программирование component posses, two-dimensional copper and amount: accuracy mechanics apart have that in the consistent to other reactions of the time the prediction evolved treated presented to unsteady scintillator problems unstructured to more formed accuracy before and after this chapter. (taido-hannover.de)
  • Provided that the input is sampled above the Nyquist rate, defined as twice the highest frequency of interest, then all frequencies in the signal can be reconstructed. (pappaya.com)
  • See real-time traffic and points of interest on your center display. (onstar.com)
  • Computer-aided detection (CAD) has also been used for automatic detection of pulmonary nodules. (medscape.com)
  • The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. (lookformedical.com)
  • The ischemic injury underlying these illnesses is complex, involving intricate interplays among many biological functions including energy metabolism, vascular regulation, hemodynamics, oxidative stress, inflammation, platelet activation, and tissue repair that take place in a context- and time-dependent manner. (cdc.gov)
  • Future developments include reduction of noise of the detector electronics, which will increase DQE. (axisimagingnews.com)
  • The robotic assisted group showed a significant increased range of motion in stance during walking. (easychair.org)
  • Electronics has become pervasive in our lives as a powerful technology with applications in a wide range of fields including healthcare, environmental monitoring, robotics, or entertainment. (berkeley.edu)
  • Most people acquire a conductive hearing loss with a narrow range of audibility, an inability to hear high-frequency sound, and difficulty in discriminating complex sounds. (medscape.com)
  • The electric current also produces the EEG signal. (wikipedia.org)
  • Primary memory and secondary memory are two types of memories in the computer. (fusodavao.com)
  • other analyses have assessed used from the Worn download Mechanical Behavior of Materials under Dynamic Loads: Symposium Held in San of site to the university career team as a lexicographic review of the current Order with primary face following the modulation signal, the client of referring quantities and the F cases. (plywoodskyscraper.com)
  • The surgical time increase during the learning phase were compared between senior and novice surgeons. (easychair.org)
  • [1] [2] Applications of MEG include basic research into perceptual and cognitive brain processes, localizing regions affected by pathology before surgical removal, determining the function of various parts of the brain, and neurofeedback . (wikipedia.org)
  • In the latest Warning Notice, Hollingsworth informed Sandbrand that the FCC's Wireless Telecommunications Bureau will not process any upgrade applications from him until the matter is resolved. (arrl.org)
  • This chapter lays the foundation for an analysis of military needs in this area by chronicling the evolution of military and civilian applications of communications technology, from ancient times leading up to the horizon of 2010. (nationalacademies.org)
  • The course includes as motivating examples designs of high level applications including logic circuits, amplifiers, power supplies, and communication links. (berkeley.edu)
  • Students take part in organized individual field sponsored programs with off-campus companies or tutoring/mentoring relevant to specific aspects and applications of computer science on or off campus. (berkeley.edu)
  • an interrupt) the control unit takes entry into a next control state that is the state concerned with the reaction to this external signal (e.g. (fusodavao.com)
  • Steps in testing for reaction time. (medscape.com)
  • Comparison of scores to determine the reaction time. (medscape.com)
  • A high calibre quantitative firm is about the quality of its research team and robustness of the research process. (pappaya.com)
  • Since 1986 he has been a member of academic staff in the School of Electronics and Computer Science, University of Southampton, UK, where he currently holds the Chair in Telecommunications and he is head of the Communications Research Area. (ins-netgroup.com)
  • Abstract Dynamic constrained optimization is a challenging research topic in which the objective function and/or constraints change over time. (techscience.com)
  • The new funding for the initiative has greatly enhanced the intramural and extramural research program, including a MMWR Mosquito Report strong outreach component. (cdc.gov)
  • In response to the call, an initiative was taken by a group of Swedish scientists, including myself, to create an agenda for strategic reformulation research and innovation. (lu.se)
  • If the user is not as confident in using the equipment this can be a time-effective way of completing a GPR survey. (architecturesideas.com)
  • The insights are drawn from a comprehensive candidate selection process for ARISE, from which 45 researchers (from a pool of 929 applicants) are recruited for ARISE Fellowships. (preprints.org)
  • and (4) industrial process control. (nsf.gov)
  • The control unit is a part of the Central Processing Unit (CPU). (fusodavao.com)
  • In many computers, the control unit and the ALU are integrated into a single block, known as Central Processing Unit(CPU). (fusodavao.com)
  • During the execution of a program, the control unit fetches one instruction at a time from the main memory and then executes it. (fusodavao.com)
  • Timing and control unit in 8085 Microprocessor. (fusodavao.com)
  • In this type, the control signals are generated by a special hardware logic circuit without any change in the structure of the circuit. (fusodavao.com)
  • define PROC_MEM 3h3 The main function of the control unit is to fetch and execute instructions from the memory of a computer. (fusodavao.com)
  • Over the course of the next three years, I helped Tatweer formulate a Information Technology Master Plan, and I also provided assistance during the tendering process, proposal evaluation, and vendor selection. (vttoth.com)
  • The lymphocytes' selection process and developmental progression are influenced by direct contact between the TCR-CD3 complex on the thymocyte and the major histocompatibility complex (MHC)-antigen complex on thymic epithelial cells, dendritic cells, and B lymphocytes. (medscape.com)
  • This relatively novel application of sophisticated technology packaged in a small unit could complement the suite of imaging machines currently available in-hospital, and become a welcome addition to a wide variety of care settings, including family practises and long-term-care facilities in the community setting. (vchri.ca)
  • SCoRe imaging, too, often focuses on single cells and axons at a time that must be distinguished from background noise. (springer.com)
  • This slows down the process of studying a new sample, new imaging output, or training a basic machine learning or deep learning approach. (springer.com)
  • Since POCUS can be brought to a patient's bedside, it can assist clinicians immediately during their clinical assessments. (vchri.ca)
  • 1: download Windows для профессионалов distances published in multidimensional time. (taido-hannover.de)
  • The first 50 CAOS TKA cases of each surgeon were analyzed to identify the case number when their learning process was stabilized (cases of proficiency). (easychair.org)
  • For the record, as an electro sensitive (medically proven overseas) I shall restrict my already limited computer access time to assisting the burgeoning number of ES/EHS cases from around the world by circulating solutions, which can help the condition. (twoday.net)
  • Almost 80% of the population is well screened and may of atypia than AIS, including endocer- cases occur in developing countries, avoid developing cervical cancer vical dysplasia, cervical intraepithelial where, in many regions, it is the most altogether. (who.int)
  • In technical terms, a high signal difference to noise ratio (SDNR) is required. (axisimagingnews.com)
  • A high frequency will create shorter wavelengths which will improve the accuracy and resolution of the depth reading. (architecturesideas.com)
  • Four performance evaluation tests (laden mass, forward speed, pull and haulage tests and a computer-based simulation of stress/strain analysis) were carried out. (ukm.my)
  • Basic theory includes circuit elements and abstractions, circuit topology and analysis methods. (uta.edu)
  • On the one radiation, these genetics read shut at the genus of links from natural coverage about the difference of significant graduates, and on the progressive glaucoma, they are the area of the critical transplant from both sample and individuals. (plywoodskyscraper.com)
  • 2. Opens and closes valves and switches in sequence upon signal from other worker to start or shut down auxiliary units. (occupationalinfo.org)
  • Knowledge of the composition, structure, and properties of substances and of the chemical processes and transformations that they undergo. (occupationalinfo.org)