Nov. 29, 1966 o. E. HULL. 3,289,196 CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY Filed Deo. 7, 1962 9 sheets-sheet 1 k Kivu, Nov. 29, 1966 o. EA HULL CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY 9 Sheets-Sheet 2 Filed Dec. Nov. 29, 1966 o. E. HULL CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY 9 Sheets-Sheet 5 Filed Deo. 7, 1962 f f e .y L C, 5 Il 7 5 /MM 5 2 j f 6 Y f6 lita i114. .c A Nov. Z9, 1966 o. E. HULL 3,289,196 CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY Filed Dec. 7, 1962 9 sheets-sheet 4 Nov. 29, 1966 o. E. HULL CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY 9 Sheets-Sheet 5 Filed Dec. Nov. 29, 1966 o. E. HULL 3,289,196 CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY Filed Dec. 7, 1962 9 Sheets-Sheet 6 fw i m w www ww www. Nm uw. www mmm A www SNN Nov. 29, 1966 o. E. HULL 3,289,196 CATHODE RAY TUBE DISPLAY WITH MEANS FOR RECORDING THE TUBE DISPLAY Filed Dec. ...
Cathode Ray Tube: Deflection Effect: to demonstrate the deviation of cathode ray by means of a magnet. Cathode Ray is deflected under influence of magnet, when a magnet or a discharged rod is brought near the tube. On a bakelite base.. VE/PHY/00020 B. Cathode Ray Tube with Butterfly: Tube bulb shaped with a bulb & flower. The tube glows on impact of reflected cathode rays, to show reflection of cathode rays. On a bakelite base.. ...
1. An organic light-emitting diode produced from an organic light-emitting diode substrate in which a concave-convex structure is provided in at least a part of a surface, wherein the concave-convex structure is capable of obtaining an atomic force microscope image in which a plurality of dots are dispersed when observed by an atomic force microscope, wherein the organic light-emitting diode is produced by a method comprising: measuring a diameter of each of the plurality of dots present in a randomly selected region having an area of 25 μm2 on the atomic force microscope image; obtaining a frequency distribution from a number of dots having a diameter corresponding to each of sections obtained by partitioning a diameter range for each 20 nm; calculating a total area of dots, which are present in each of the sections from the frequency distribution; and creating a histogram in which the total area is shown in a Y-axis and the diameter of the dot is shown in an X-axis, the histogram has a ...
DIY Cathode Ray Tube: Interacting With Electrons: Electrons: they are all around us, but we cannot really see or interact with them. Luckily, there is a device that will let you. A cathode ray tube, or CRT, is a glass tube with electrodes on either end. When there is a vacuum drawn and a high vo…
CARBONARI, Karina et al. Increased micronucleated cell frequency related to exposure to radiation emitted by computer cathode ray tube video display monitors . Genet. Mol. Biol. [online]. 2005, vol.28, n.3, pp.469-474. ISSN 1415-4757. http://dx.doi.org/10.1590/S1415-47572005000300024.. It is well recognized that electromagnetic fields can affect the biological functions of living organisms at both cellular and molecular level. The potential damaging effects of electromagnetic fields and very low frequency and extremely low frequency radiation emitted by computer cathode ray tube video display monitors (VDMs) has become a concern within the scientific community. We studied the effects of occupational exposure to VDMs in 10 males and 10 females occupationally exposed to VDMs and 20 unexposed control subjects matched for age and sex. Genetic damage was assessed by examining the frequency of micronuclei in exfoliated buccal cells and the frequency of other nuclear abnormalities such as binucleated ...
TY - JOUR. T1 - Similarities and differences of alkali metal chlorides applied in organic light-emitting diodes. AU - Lü, Zhaoyue. AU - Deng, Zhenbo. AU - Hou, Ying. AU - Xu, Haisheng. N1 - Funding Information: We thank the Science and Technology Commission of Suzhou Municipality (contract no. ZXG2012037 ) and the National Natural Science Foundation of China (contract nos. 60977027 and 91123034 ) for financially supporting this work. PY - 2012/12/15. Y1 - 2012/12/15. N2 - The similarities and differences of alkali metal chlorides (sodium chloride (NaCl), potassium chloride (KCl), rubidium chloride (RbCl) and cesium chloride (CsCl)) applied in organic light-emitting diodes (OLEDs) are investigated. The behavior is similar for the OLEDs with these four chlorides as electron injection layer (EIL). Their maximum luminance and efficiency at 100 mA/cm 2 are within the ranges of 18 550 ± 600 (cd/m2) with an error of 3.23% and 4.09 ± 0.15 (cd/A) within an error of 3.67%, respectively. The similar ...
TY - JOUR. T1 - Organic light-emitting diodes with an electro-deposited copper(I) thiocyanate (CuSCN) hole-injection layer based on aqueous electrolyte. AU - Tsai, Chi Ting. AU - Gottam, Sandeep Reddy. AU - Kao, Po Ching. AU - Perng, Dung Ching. AU - Chu, Sheng Yuan. PY - 2019/10. Y1 - 2019/10. N2 - Copper(I) thiocyanate (CuSCN) has been drawing much attention in optoelectronics due to its exceptional optical and electrical properties, as well as its processing versatility. The first organic light-emitting diodes (OLEDs) integrated with electro-deposited CuSCN crystalline thin films based on aqueous electrolyte were fabricated. With precisely tuned deposition parameters, the CuSCN thin films with satisfactory surface roughness and sufficient grain density were realized. We found that the driving voltage (voltage at a current density of 100 mA/cm2) and turn-on voltage of OLEDs using CuSCN as the hole injection layer (HIL) can be reduced by 1.41 and 1.79 V, respectively, compared with devices ...
An improved lens system for a projection television is described. The lens system is designed to be used with a cathode ray tube having a face glass with an aspheric surface having phosphor elements mounted thereto. The aspheric surface of the face glass has its maximum radius at the optical axis and is of lesser radius outwardly thereof. From the screen, the lens system companies a first aspheric lens of relatively weak power, a second biconvex lens of relatively high positive power, a third aspheric lens of weak positive power and a fourth lens having a concave face on its screen sider and of relatively large negative power.
A flexible organic light emitting diode (FOLED) is a type of organic light-emitting diode (OLED) incorporating a flexible plastic substrate on which the electroluminescent organic semiconductor is deposited. This enables the device to be bent or rolled while still operating. Currently the focus of research in industrial and academic groups, flexible OLEDs form one method of fabricating a rollable display. An OLED emits light due to the electroluminescence of thin films of organic semiconductors approximately 100 nm thick. Regular OLEDs are usually fabricated on a glass substrate, but by replacing glass with a flexible plastic such as polyethylene terephthalate (PET) among others, OLEDs can be made both bendable and lightweight. Such materials may not be suitable for comparable devices based on inorganic semiconductors due to the need for lattice matching and the high temperature fabrication procedure involved. In contrast, flexible OLED devices can be fabricated by deposition of the organic ...
Page contains details about TTPPCCuI-based organic light-emitting diode . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Page contains details about organic light-emitting diode with polyvinylpyrrolidone-passivated vanadium oxide film after UV-O3 treatment as hole transport layer . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Organic electroluminescent materials play an important role in improving the optoelectronic performance of organic light-emitting diodes (OLEDs). Aromatic imide/amide-based organic small-molecule emitters have caught increasing attention due to their unique properties, such as strong electron-withdrawing characteri
Non-doped architecture has achieved great success as a universal method for simplifying the structure of organic light-emitting diodes (OLEDs). Currently, great challenges remain in the quest to further enhance the efficiency and reduce the pronounced roll-off for ultrathin emitting layer (UEML) based device
TY - JOUR. T1 - 2,7-Bis(diarylamino)-9,9-dimethylfluorenes as Hole-Transport Materials for Organic Light-Emitting Diodes. AU - Hreha, Richard D.. AU - George, Candace P.. AU - Haldi, Andreas. AU - Domercq, Benoit. AU - Malagoli, Massimo. AU - Barlow, Stephen. AU - Bredas, Jean-Luc. AU - Kippelen, Bernard. AU - Marder, Seth R.. PY - 2003/12/1. Y1 - 2003/12/1. N2 - 2,7-Bis(p-methoxyphenyl-m′-tolylamino)-9,9-dimethylfluorene (1′), 2,7-bis(phenyl-m′-tolylamino)-9,9-dimethylfluorene (2′) and 2,7-bis(p-fluorophenyl-m′-tolylamino)-9,9-dimethylfluorene (3′) have been synthesized using the palladium-catalyzed reaction of the appropriate diarylamines with 2,7-dibromo-9,9-dimethylfluorene. These molecules have glass-transition temperatures 15-20 °C higher than those for their biphenyl-bridged analogues, and are 0.11-0.14 V more readily oxidized. Fluorescence spectra and fluorescence quantum yields for dimethylfluorene-bridged and biphenyl-bridged species are similar, but the peaks of the ...
Introduction The purpose of this book is to bring a broad spectrum of information related to cathode ray tube (CRT)-based displays into a single easy-to-understand narrative. It requires no working knowledge of a television or how one programs a video cassette recorder (VCR). The starting point of each chapter will be basic information that is followed by detailed explanations and insight into the design trade offs that influence the image observed. The sequence of topics follows that in a workshop prepared by the author, and the chapters may be read in any order. However, the information in each chapter does build upon the material in the preceding chapters. It should be noted that all references to a cathode ray tube in this book are to only the glass part giving off light in a display. They do not include the entire display or monitor with the associated electronics, a point of confusion at times even within the industry. All CRTs use glass as a starting point; formulas involved (glass melt) ...
This game between Gene and Jim, for that is the implication with the symbolic object of the football, is about following or bending the rules. In the Ashes To Ashes universe these games are about anarchy versus order, from Genes unpremeditated assumption of control over the riot to Keats premeditated by the book attempts to use his colleagues to undermine him as well as, having foreknowledge of Vivs fate (he whistles the Bubbles tune as he leaves Genes domain). Gene also counters Keats desire to see him fail with the visitor records to the prison, suggesting Keats is causally linked to the riots. Tit for tat, again. There is also Alexs strange dream of Chris, Shaz and Ray all sitting round a table in a field (rather like a family) unwrapping a present or a parcel. A bit like the childrens game of pass the parcel, it is revealed to be the tin box that is then found in Paul Thordys possessions and in the desk drawer in Genes office. Each opening of the box reveals a clue and it ...
Three scanners are disclosed; common to all is an argon ion laser. In the first two versions, light passes through a telescope, which is provided to expand and collimate the laser beam, through a servo-driven iris whose function is to adjust the length of the slit image to be formed by the optics. The beam enters a rotating cradle, passes through a cylindrical lens, and strikes a galvanometer-driven mirror. Rotating the galvanometer about its axis deflects the image of the laser beam on the main scanning mirror. A second lens images the galvanometer mirror onto the CRT panel. In the first version, the main scanning mirror is a flat reflector; in the second version, the scanning mirror is either a prism or a mirror set at 45 degrees to the incident laser beam. In both versions, a motor-driven optical rotator is between the galvanometer-driven mirror and the scanning mirror. Several important features include the servo-driven image rotator and the motor-driven iris. In the third version, the optical
The moving images that it receives from a nearby broadcasting station is projected in three dimensions by the cathode ray tube or CRT and it also has an audio decoder to reproduce the sounds from the transmitted radio signals through the audio speakers. It is mainly used for entertainment, information and education. It is also referred to as a television set, television transmission or television program.. Unlike the internet where it is still struggling to compete with TV even nearing the completion of its third decade since it was made for public use; TV took over print media and radio broadcasting overnight! The world quickly catch on and before we knew it, TV had become a global phenomenon. Today there are approximately 4.7 billion units of television throughout the world and they range from the old cathode ray tubes to the flat LCD and plasma screens and all the way up to the latest LED curved TVs. In fact, there are more TV sets than computers in the world today and it seems computers ...
An examination of the human heart is carried out by means of ultrasound waves emitted by piezo-electric crystals. The crystals are inserted in a holder adapted to be placed on the body of a patient; they are arranged in a row and have parallel axes of radiation. The crystals are cyclically excited at a high scanning frequency, and the echo signals reflected by the heart walls and received by the crystals are displayed on the screen of a cathode ray tube to obtain a cross-sectional picture of the heart. In a modification of the invention, the holder comprises two or more rows of crystals radiating at different angles; in this case the echo signals related to a common point of the heart wall are superposed on the screen of the cathode ray tube by means of a coordinate transformation.
To sequence DNA, DNA samples marked with flourscent infrared dye are applied at a plurality of locations for electrophoresing in a plurality of channels through a gel electrophoresis slab. The channels are scanned with a laser and a sensor, that include a microscope focused on the gel slab. The focal point and slab are adjusted with respect to each other so that the focal point of the microscope remains on the gel slab during a scan. The data from the scan is directly used to amplitude modulate density readings on a display, and the scan is displayed in a horizontal sweep of a cathode ray tube, whereby said cathode ray tube provides intensity displays of bands representing DNA. Different sizes of glass gel sandwiches may be mounted to the same console for different sequencing tasks.
Feb. 2, 1954 M G, WHlTE 2,668,286 MOVING OBJECT SELECTIVE DETECTION SYSTEM Filed 001:. 25, 1943 ELE; #Magg/c Patented Feb. 2, 1954 assise UNITED STATES ATENT OFFICE MOVING OBJECT SELECTIVE DETECTION SYSTEM 15 Claims. Ihis invention relates to radio echo detection systems and particularly to a method and apparatus for improving the indication in such systems. One system of radio-echo detection which has been successfully used comprises a transmitter and associated antenna system for radiating a beam oi electromagnetic radiation into space toward the horizon and rotating the beam about a substantially vertical axis, so as to scan the horizon in repeated cycles. The radiation is modulated, so as to form discrete pulses and is reflected back from objects within the field of scanning which intercept the radiation, causing the electron beam of a cathode ray tube to be intensied, so as to produce spots of light on the face of the tube. The electron beam oi the cathode ray tube is caused to sweep ...
Thermal ground data and thermal reference data acquired by an airborne scanner are recorded on magnetic tape along with timing signals synchronized with the scanning. At some later time, the signals are played back and processed to produce a color image on a line-scanned cathode ray tube and the image is recorded on a continuous color film strip. Ground data signals are processed by a particular analog-to-digital converter to provide signals according to the instantaneous level of the thermal ground data compared to discrete reference levels which in turn are calibrated according to the thermal reference data. The digital signals gate color guns in the cathode ray tube at fixed intensity levels so that the color image is composed of a predetermined number of colors.
Scientists from Tohoku University in Japan have created a new type of energy-efficient flat light source. The light source, which employs carbon nanotubes, has a very low power consumption of around 0.1 Watt for every hours operation.
DOCTOR WHO: THE PANDORICA OPENS (2010). A worthy addition to serious texts on Doctor Who - Doctor Who Magazine 431, February 2011 an impressive work, imbued with so much analytical love and passion, and is an absolute must-read for any fan N. Blake - Amazon 4/5 stars ...mixes the intellectual and the emotional very well...its proper media criticism 9/10 - The Medium Is Not Enough ... an up-to-date guide that isnt afraid to shy away from the more controversial aspects of the series 8/10 - Total SciFi Online ...well-informed new angles on familiar episodes... this is a great read from start to finish - Bertie Fox - Amazon 4/5 stars Frank Collins has produced a book that is fiercely idiosyncratic, displays a wide-ranging intellect the size of a planet, but which is also endearingly open and inclusive in its desire to share its expansive knowledge... 4/5 - Horrorview.com The book is great! It makes you think, it makes you work. It encourages you to go back and watch the series with a ...
Gadolinium is a chemical element. It has the chemical symbol Gd. It has the atomic number 64. It is part of a group of chemical elements in the periodic table named the Lanthanides. It is a rare earth element. It is silvery white, malleable and ductile. Its main uses are as chemical compounds in color televisions and nuclear magnetic resonance radio contrast agents. In color cathode ray tube televisions (the type first produced, not flat televisions) some of the pixels are dots gadolinium compounds. When the electrons from the cathode ray tube hit the pixels and transfer energy to the gadolinium compounds they give out light as energy. Nuclear magnetic resonance (NMR) imaging is used in medicine where it is named MRI (Magnetic resonance imaging). It is used to take picture of inside the body. How the pictures look is changed by the gadolinium compounds and how much water is around. It makes the images clearer because it makes the difference in the concentration of water in different parts of the ...
A method is disclosed for making multi-component phosphor structures whose emission color depends on the energy of the electrons used to excite them. The method comprises the mixing of two or more component phosphors, each component phosphor having particles with non-luminescent interior core regions and non-luminescent exterior surface regions separated by a luminescent region, the region dimensions and emission color of each component being distinct. These structures are formed by diffusing activating and/or coactivating impurities partially into the particles, or by growth of activated material on the outside of non-luminescent material, and by the subsequent diffusion of luminescence killing impurities partially into the luminescent region.
FCMD tracks contractor misconduct, including fraud, poor performance, and noncontract violations, in order to improve transparency and public awareness of how Uncle Sam spends billions annually.
Local field potential (LFP) recordings from patients with deep brain stimulation electrodes in the basal ganglia have suggested that frequency-specific activities correlate with force or effort, but previous studies have not been able to disambiguate the two. Here, we dissociated effort from actual force generated by contrasting the force generation of different fingers while recording LFP activity from the subthalamic nucleus (STN) in patients with Parkinsons disease who had undergone functional surgery. Patients were studied while on their normal dopaminergic medication. We investigated the relationship between frequency-specific oscillatory activity in the STN and voluntary flexion of either the index or little finger at different effort levels. At each tested effort level (10%, 25%, and 40% of the maximal voluntary contraction force of each individual finger), the index finger generated larger force than the little finger. Movement-related suppression of beta-band power in the STN LFP was
TY - JOUR. T1 - Light-emitting diodes fabricated from biomolecular compounds. AU - Tajima, H.. AU - Shimatani, K.. AU - Komino, Takeshi. AU - Ikeda, S.. AU - Matsuda, M.. AU - Ando, Y.. AU - Akiyama, H.. PY - 2006/8/15. Y1 - 2006/8/15. N2 - We fabricated ITO/biomolecule/Al junctions using chrolophyll a, cytochrome c, myoglobin, hemin, Vitamin B12. All the junctions worked as organic light-emitting diode (OLED). The quantum efficiencies of the fabricated OLED were of the order of 1 × 10-7 around V = 10 V, and did not seriously depend on whether or not a compound exhibits photoluminescence. Based on the energy diagram of the ITO/cytochrome c/Al junction, we discuss the difference of the EL spectrum from the photoluminescence or absorption spectrum.. AB - We fabricated ITO/biomolecule/Al junctions using chrolophyll a, cytochrome c, myoglobin, hemin, Vitamin B12. All the junctions worked as organic light-emitting diode (OLED). The quantum efficiencies of the fabricated OLED were of the order of 1 ...
Abstract: Proponents for sustainable alternative lighting and display options advocate for organic light-emitting diodes (OLEDs), particularly polymer-based organic light-emitting diodes (P-OLEDs), because of their potential for low-cost fabrication, more versatile device formats and lower power consumption compared to traditional options. Here, an economic, energy and CO2 emissions assessment is carried out for four different laboratory-scale, blue-emitting P-OLED device architectures: bottom-emitting conventional; bottom-emitting inverted; top-emitting conventional; and top-emitting inverted. Additionally, comparisons with a standard, commercial-scale, blue inorganic light-emitting diode (LED) device architecture are made. The various P-OLED device architectures are investigated due to their potential to increase operational lifetime (inverted) and light out-coupling efficiency (top-emitting). The following metrics are used in this assessment: device cost per area; yearly operating cost; ...
0151] The hole transport layer comprises hole transport material. Examples of hole transport materials for the hole transport layer have been summarized for example, in Kirk-Othmer Encyclopedia of Chemical Technology, Fourth Edition, Vol. 18, p. 837-860, 1996, by Y. Wang. Both hole transporting small molecules and polymers can be used. Commonly used hole transporting molecules include, but are not limited to: 4,4,4-tris(N,N-diphenyl-amino)-triphenylamine (TDATA); 4,4,4-tris(N-3-methylphenyl-N-phenyl-amino)-triphenylamine (MTDATA); N,N-diphenyl-N,N-bis(3-methylphenyl)-[1,1-biphenyl]-4,4-diamine (TPD); 4,4-bis(carbazol-9-yl)biphenyl (CBP); 1,3-bis(carbazol-9-yl)benzene (mCP); 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC); N,N-bis(4-methylphenyl)-N,N-bis(4-ethylphenyl)-[1,1-(3,3-dimethyl)bip- henyl]-4,4-diamine (ETPD); tetrakis-(3-methylphenyl)-N,N,N,N-2,5-phenylenediamine (PDA); α-phenyl-4-N,N-diphenylaminostyrene (TPS); p-(diethylamino)benzaldehyde diphenylhydrazone (DEH); ...
Joshua E. Malinsky, Weijin Li, Homer Chou, Wuping Ma, Lifeng Geng, Tobin J. Marks, Ghassan E. Jabbour, Sean E. Shaheen, Bernard Kippelen, Nasser Peyghambarian, Pulak Dutta, Andrew J. Richter, Neal R. Armstrong, Paul A. Lee, Jeffrey D. Anderson ...
1-800-GET-LENS ® - Paragon Vision Sciences Contacts - LOWEST PRICE GUARANTEE on all Paragon Vision Sciences contact lenses. Shop online at 1-800-GET-LENS ® for your Paragon Vision Sciences contact lenses online or call toll-free 1-800-GET-LENS. Hassle-Free Ordering & Express Delivery.
Non-doping white organic light-emitting devices (WOLEDs) based on an ultrathin yellow-emitting layer of rubrene inserted between the blue-emitting layer 4,4-bis(2,2-diphenylvinyl)-1,1-biphenyl (DPVBi) and the electron transport layer tris-(8-hydroxyquinoline)aluminum (Alq3) fabricated by combinatorial sliding shutter technique are reported. Three of the the sixteen devices made had Commission Internationale de lEclairage (CIE) coordinates within the white region at 8 - 16 V, ranging from (0.31, 0.38) to (0.34, 0.42). All three devices had a 5-nm thickness of DPVBi layer and an ultrathin rubrene layer of thickness of 0.05-, 0.10-, and 0.15 nm, respectively. A maximum luminance of 12,900 cd/m2 at 17 V and an efficiency of 5.5 cd/A at 8.5 V were obtained in the devices with 0.05 nm rubrene layer. These devices can be fabricated rather easily due to their simple device structure and they are very appealing to low-cost general lighting applications ...
Disclosed herein are an organic light-emitting device having a structure formed by the sequential deposition of a substrate, a first electrode, at least two organic layers and a second electrode, in w
Alloys, Cathode, Cathode Ray, Cathode Ray Tubes, Electrodeposition, Electron, Electron Microscopy, Fluorescence, Microscopy, PH, Scanning Electron Microscopy, Solutions, X-ray
Several scientists, such as William Prout and Norman Lockyer, had suggested that atoms were built up from a more fundamental unit, but they envisioned this unit to be the size of the smallest atom, hydrogen. Thomson in 1897 was the first to suggest that one of the fundamental units was more than 1,000 times smaller than an atom, suggesting the subatomic particle now known as the electron. Thomson discovered this through his explorations on the properties of cathode rays. Thomson made his suggestion on 30 April 1897 following his discovery that cathode rays (at the time known as Lenard rays) could travel much further through air than expected for an atom-sized particle.[19] He estimated the mass of cathode rays by measuring the heat generated when the rays hit a thermal junction and comparing this with the magnetic deflection of the rays. His experiments suggested not only that cathode rays were over 1,000 times lighter than the hydrogen atom, but also that their mass was the same in whichever ...
TY - GEN. T1 - Innovative pattern reversal displays for visual electrophysiological studies. AU - Toft-Nielsen, J.. AU - Bohorquez, Jorge. AU - Ozdamar, Ozcan. PY - 2011/12/26. Y1 - 2011/12/26. N2 - Pattern Reversal (PR) stimulation is a frequently used tool in the evaluation of the visual pathway. The PR stimulus consists of a field of black and white segments (usually checks or bars) of constant luminance, which change phase (black to white and white to black) at a given reversal rate. The Pattern Electroretinogram (PERG) is a biological potential that is evoked from the retina upon viewing PR display. Likewise, the Pattern Visual Evoked Potential (PVEP) is a biological potential recorded from the occipital cortex when viewing a PR display. Typically, PR stimuli are presented on a Cathode Ray Tube (CRT) or Liquid Crystal Display (LCD) monitor. This paper presents three modalities to generate pattern reversal stimuli. The three methods are as follows: a display consisting of array of Light ...
AbeBooks.com: Vision Science: Photons to Phenomenology: Quarto in black boards (black spine, white text); illus.; 810 pp., 26 cm. In English. || Association copy from the library of Dr. Donald A. Glaser, inventor of the bubble chamber and recipient of the Nobel Prize in Physics, 1961. Dr. Glasers name stamp is on the upper open corner of the ffep.; Search keyword DGLSR to see dozens of volumes from The Glaser Collection. Contents: An introduction to vision science -- Theoretical approaches to vision -- Color vision : a microcosm of vision science -- Processing image structure -- Perceiving surfaces oriented in depth -- Organizing objects and scenes -- Perceiving object properties and parts -- Representing shape and structure -- Perceiving function and category -- Perceiving motion and events -- Visual selection : eye movements and attention -- Visual memeory and imagery -- Visual awareness -- Appendices : Psychophysical methods -- Connectionist modeling -- Color technology. Very good(+) copy; previous
Original versions of thermal imagers displayed thermal images through the use of black and white cathode ray tubes (CRTs)! Permanent records were possible with
Are Computers Bad For Health? Love them or hate them, computers are essential in most things we do. They can provide hidden dangers, however. With the old type of screen with the cathode ray tube, the electrons would emit electromagnetism which is not good for health. They are very rare these days and the flat screens dont carry this risk. Excessive computer work can still damage your health. The blue light of a computer monitor and other digital devices, like televisions…. ...
In this day and age, technology most certainly has become an integral part of our life. Modern day technology has undoubtedly made our daily lives much more efficient while bringing us more convenience and flexibility along the way. The evolution of technology has also changed the way we socialize, entertain ourselves, and now quite possibly the way we behave. The existence of video games began approximately 65 years ago. What began as a simple Cathode Ray Tube Amusement Device has now transformed itself into modern day video game platforms. These platforms consist of using a personal computer, video game consoles, arcade games, and smartphones as a fundamental requirement to run the video game software. Video games along with modern day technology have now joined forces to create high definition video with high end graphics to deliver a realistic virtual gaming experience. The ultimate gaming experience however, comes with consequence and is now finding itself in the midst of a controversial ...
Pacific University students who are interested in a career in optometry and vision science may choose to complete a pre-optometry and vision science track along with their bachelors degree in preparation for optometry school, such as Pacifics College of Optometry.
Columnar mesophases of discotic liquid crystals (DLCs) are a separate class of organic semiconductors. Anisotropic charge transport, high charge carrier mobility, and self-organizing properties have been regarded as superior properties of DLCs but their performance in devices, such as organic light-emitting diodes, has been inferior to the best performing conventional organic semiconductors. Our group recently demonstrated that a DLC of donor-acceptor structure can bias electron over hole conduction if the occupied and unoccupied frontier orbitals are localized on different parts of the molecule and only the unoccupied frontier orbitals electronically interact in columnar stacks. This thesis describes the first systematic approach to different types of donor-acceptor DLCs and the investigation of their mesomorphism and optoelectronic properties. In spite of their large aspect ratios, four board-shaped donor-acceptor-donor quinoxalinophenanthrophenazine (QPP) dyes (Chapters 2 and 3) induce complex
Researchers are developing technologies that they hope will put entire computers and large-format screens onto wafer-thin glass, or even plastic that can be rolled up; most promising technology is based on Kodaks organic light-emitting diode, which is less bulky and consumes less power than liquid-crystal displays, technology at heart of most of todays flat screens; photo (M)
Organometallic complexes of iridium have gained importance because of their novelty, reactivity and applications in diverse fields. In this book, the authors present current research in the study of the occurrence, characteristics and applications of iridium. Topics include the synthetic methods of different classes of volatile organometallic and coordination compounds of iridium; homogeneous iridium catalysts in aqueous solution; applications of iridium catalysts in green chemistry; iridium-carbonyl complexes of nitrogen-oxygen and phosphorous-oxygen donor ligands; iridium-catalyzed allylic substitutions; a novel amperometric transducer electrode with iridium-niobium binary alloys; and highly efficient electrophosphorescent organic light-emitting diodes based on iridium (III) complexes containing carbazole units. (Imprint: Nova). ...
Pyrene-cored [5]helicenes were prepared by a facile, efficient Wittig reaction and an intramolecular photocyclization reaction utilising 2,7-di-tert-butylpyrene-4-carbaldehyde and naphthalene/pyrene-based phosphorus ylides. Optical properties based on UV À vis absorption and fluorescence spectra were investigated. X-ray crystallography revealed that the pyrene-based [5]helicenes exhibited strong face-to-face p À p interactions and edge-to-face p À p interactions. HOMO and LUMO energies and molecular orbitals were also studied by density functional theory (DFT) calculations. This study has revealed that the torsion angle of the helical structure plays a role in determining the p À p interactions and the frontier molecular orbital energy levels. Thus, pyrene-based helicenes need to be considered when one designs new highly efficient organic light-emitting diodes and organic semiconductor materials.
Frequency up-conversion is demonstrated in a polyfluorene-based conjugated polymer. Up-converted emission is observed upon excitation to the red of the 0-0 luminescence band. The emission intensity depends strongly on temperature and provides an accurate probe of the operating temperature of organic light-emitting diodes. Temperature rises of up to 30 K are observed at standard operating current densities of 225 mA/cm2. Due to the low thermal conductivity and heat capacity of the polymer film, the temperature of the film is found to rise slowly on a time-scale of seconds. Upon termination of the current, the temperature decreases again on a time-scale of minutes. © 2002 American Institute of Physics ...
Emil J. W. List1,2,* and Norbert Koch3,4,5 1NanoTecCenter Weiz Forschungsgesellschaft m.b.H., Franz-Pichler-Straße 32, A-8160 Weiz, Austria 2Institut für Festkörperphysik, Technische Universität Graz, Petersgasse 16, A-8010 Graz, Austria 3Helmholtz Zentrum Berlin für Materialien und Energie GmbH Elektronenspeicherring BESSY II Albert-Einstein Str. 15, 12489 Berlin, Germany 4Institut für Physik, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 6, D-12489 Berlin, Germany [email protected] *Corresponding author: [email protected] ...
Consider that not so long ago, considerable concern was expressed among optometric educators that our focus on optics was diminishing with the increases in biologic sciences training related to eye disease management responsibilities. Many challenged the NBEO to reflect soberly on student performance in optics on the National Board examinations and some practitioners warned that there was a diminished interest in optics. However, it is now clear that the new optics has more, not less, relevance to the practice of optometry than it did just 10 years ago. As a result of new developments in measuring and correcting the aberrations of individual human eyes, two excellent and prophetic editorials in Optometry and Vision Science heralded these changes in optometric and ophthalmologic practice.1,2 Now the modern new visual optics, the ability to characterize, measure, correct, and even begin to relate the eyes optical aberrations to vision expectations in simple ways beyond the spherical and ...
To access the journal online, American Academy of Optometry Members can access all current content published in Optometry and Vision Science by completing login at the AAO website using the journal link to come back to this site and view content. Click the Current Issue or Previous Issues navigation buttons and select an issue to view full-text article content. ...
Global Optometry and Vision Science Conference is going to be held from May 14-15 in Singapore. Global optometry 2017 discusses on the
Neil R. A. Parry,1,* Athanasios Panorgias,2,4 Declan J. McKeefry,3 and Ian J. Murray2 1University of Manchester Health Science Research Centre and Vision Science Centre, Manchester Royal Eye Hospital, Manchester M13 9WH, UK 2Faculty of Life Sciences, Carys Bannister Building, The University of Manchester, Manchester M13 9PT, UK 3Bradford School of Optometry & Vision Sciences, University of Bradford, Bradford BD7 1DP, UK 4Current address: Department of Ophthalmology and Vision Science, University of California, Davis, Sacramento, California 95817, USA *Corresponding author: [email protected] ...
A tubular cathode was prepared by subsequently dipcoating the gas diffusion layer, Pt/C catalyst layer and Nafion membrane on the outside of the tubular Ti mesh. The single direct methanol fuel cell composed of the above electrodes was discussed under normal pressure, and the factors that affected the cell performance were discussed. The results also show that the diffusion layer and catalyst layer prepared by dip coating have mesoporous microstructure which is beneficial to mass transport. With catalyst loading increasing, the cell performance improves. When the Pt loading on cathode is 4.3 mg/cm2, the power density of DMFC reaches 12.3 mW/cm2 at room temperature by using air as the cathode feed. With the oxygen as the cathode feed, the power density of DMFC can reach 40.0 mW/cm2 at 60°C. This indicates that the temperature and oxidant type are as important as the cathode catalyst loading. The stability test of the cell after working for 100 h shows that the tubular cathode has a perfect ...
This is thermoluminescence. Diamond, marble, and fluorite are examples. Only certain varieties of fluorite show the phenomenon well. A crystal of one of these varieties heated in the bunsen flame on an iron spoon will give off a white light long before any trace of redness appears in the iron. Other crystals may luminesce in hot water. In all, this luminescence is dependent on a previous illumination or radiation of the crystal. If kept in the dark for a long time no trace of light appears when fluorite is placed at a temperature of 100°, but after a short exposure to the light of an incandescent bulb, although no light can be observed in the fluorite at room temperature, quite a bright glow appears at 100°. Calcium, barium, strontium, magnesium and other sulphates containing traces of manganese sulphate, show a similar phenomenon after exposure to cathode rays (Wiedemann and Schmidt, 1895 b). They emit light during bombardment, but this soon ceases when the rays are cut off. If the sulphates ...
The subcommittee reviewed the prevalence, incidence, risk factors, natural history, morbidity and questionnaires reported in epidemiological studies of dry eye disease (DED). A meta-analysis of published prevalence data estimated the impact of age and sex. Global mapping of prevalence was undertaken. The prevalence of DED ranged from 5 to 50%. The prevalence of signs was higher and more variable than symptoms. There were limited prevalence studies in youth and in populations south of the equator. The meta-analysis confirmed that prevalence increases with age, however signs showed a greater increase per decade than symptoms. Women have a higher prevalence of DED than men, although differences become significant only with age. Risk factors were categorized as modifiable/non-modifiable, and as consistent, probable or inconclusive. Asian ethnicity was a mostly consistent risk factor. The economic burden and impact of DED on vision, quality of life, work productivity, psychological and physical ...
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Profile: Dr Maria Markoulli: Ive been singing in a choir since 2012. At that time, Id just finished my PhD and really craved a musical group environment. Attending my first rehearsal was a bit nerve wracking. Part of me was worried that I would embarrass myself and never come back. But on the contrary, choir turned out to be an amazing experience. I was struck by how inspiring it was to watch a group of people come together and create such beautiful music. They sang so effortlessly and yes, harmoniously. ...
This is the collection for the University of Waterloos School of Optometry and Vision Science .. Research outputs are organized by type (eg. Master Thesis, Article, Conference Paper).. Waterloo faculty, students, and staff can contact us or visit the UWSpace guide to learn more about depositing their research.. ...
Meet leading Scientists, Professors, Researchers, Partial Neuro Opthalmology Doctors, Scientists, Directors of Neuro Opthalmology companies, Neuro Opthalmology Researchers from London UK
An cathode is the terminal from which electrons enter a system. In a device which consumes power the cathode is negative, and in a device which provides power the cathode is positive. In electrolysis, the cathode is the negatively charged electrode, connected to the negative terminal of an electric supply. It attracts positive ions, which then gain electrons at the cathode.. ...
Single Element Atomax hollow cathode lamp (HCL) for the detection of elemental Tellurium (Te).. PerkinElmer Atomax 1.5 hollow cathode lamps are crafted to the same high standards that have made our 2 Lumina™ hollow cathode lamps the best in the industry. Drawing on more than 40 years of HCL design and manufacturing expertise, Atomax lamps now offer laboratories around the world a dependable, top-quality lighting source, regardless of the brand of AA instruments used.. All 1.5 Atomax hollow cathode lamps are thoroughly tested to ensure maximum light output and spectral purity. Comparative results show that Atomax lamps provide equal or better performance than other AA lamps in the market. Precision engineered for high sensitivity, stable light output, low noise, and long life, you can rely on Atomax lamps for the accurate results you need.. ...
Single Element Atomax hollow cathode lamp (HCL) for the detection of elemental Mercury (Hg).. PerkinElmer Atomax 1.5 hollow cathode lamps are crafted to the same high standards that have made our 2 Lumina™ hollow cathode lamps the best in the industry. Drawing on more than 40 years of HCL design and manufacturing expertise, Atomax lamps now offer laboratories around the world a dependable, top-quality lighting source, regardless of the brand of AA instruments used.. All 1.5 Atomax hollow cathode lamps are thoroughly tested to ensure maximum light output and spectral purity. Comparative results show that Atomax lamps provide equal or better performance than other AA lamps in the market. Precision engineered for high sensitivity, stable light output, low noise, and long life, you can rely on Atomax lamps for the accurate results you need.. ...
The use of alternate cathode materials with improved performance and without any chemical reaction with adjoining electrolyte is required for a reduction in operating temperature of SOFC from 1273 K to about 1073 K (ITSOFC). Cobalt containing perovskite oxides such as LaCoO₃ tend to exhibit a higher ionic conductivity due to a greater concentration of oxygen vacancies than other perovskite oxides. The mixed ionic and electronic conducting cathode of the La₁₋xSrxCoO₃₋δ systems has shown the lowest cathodic overpotential for an SOFC air electrode. In this research work, fine powders of La₀․₇₀Sr₀․₃₀CoO₃₋δ (LSC) cathode and Ce₀․₉₀Gd₀․₁₀O₂₋δ (GDC) and Ce₀․₈₀Sm₀․₂₀O₂₋δ (SDC) are synthesized by glycine nitrate combustion synthesis and systematically characterized by XRD and particle characteristics. The electrical properties of LSC cathode and GDC and SDC electrolytes are also studied. But, the crucial requirement for ...
RecycLiCo™ Sample Outperformed Commercial Grade Cathode Precursor Purity American Manganese Inc. (TSX-V: AMY) (OTCQB: AMYZF) (FSE: 2AM) a pioneer in advanced lithium-ion battery cathode recycling, is pleased to report that the recycled product, produced from recycled NCA (lithium-nickel-cobalt-aluminum oxide) cathode waste has been shipped to an international cathode manufacturer for the …
The invention is a method for operating a vertically disposed, electrolytic cell of the type having: a hydraulically permeable, hollow, cylindrically shaped cathode; a hydraulically permeable, hollow, cylindrically shaped anode concentric with and surrounding said cathode to define an annular space therebetween; and a hollow, cylindrically shaped, ion permeable membrane interposed between, and concentric with, said cathode and said anode, said membrane separating and defining an anode compartment containing the anode and a cathode compartment containing the cathode; wherein said process comprises: (a.) flowing a catholyte from a lower portion of the cathode compartment, upward toward the upper portion of the cathode compartment, at least a portion of said flow passing adjacent to the cathode at a rate sufficient to sweep away at least a portion of any gas, formed during electrolytic operation of the cell; wherein at least a portion of said catholyte flow is through the annular space between the cathode
In order to reduce annoying reflection of ambient light, anti-glare film has been developed and applied to electronic displays, such as PCs and smartphones.. However, as a side-effect of applying anti-glare film, sparkle pattern becomes obvious as fine and irregular luminance distribution caused by the combination of uneven surface-structure of anti-glare film and display matrix structure.. In the past, the degree of sparkle was evaluated visually by skilled personnel based on professional experience, but individual differences affected the reproducibility of the results. Furthermore, there was another problem regarding how to quantify the measurement results.. This led to a series of developments in the market of quantitative sparkle measurement methods, i.e. measurement of display sparkle contrast.. However, even with the same sample, it has been difficult to get reliable and quantitatively comparable data from different parties. This is largely because the measurement parameters from each ...
The African Vision and Eye Health journal publishes original peer-reviewed papers of scientific and clinical research in optometry, ophthalmology, vision science and other related fields.
Buy the book at Amazon. German, Korean, Japanese. Praise for THE VISION REVOLUTION: Made Best Books of 2009 story. -- New Scientist. Among Best of the Year books. ...this book is indispensable. -- Daniel Piza, Estadao, Aug, 2010. I think Vision Revolution is one of the best works of theoretical vision science since Gibson. --…
Webvision summarizes recent advances in knowledge and understanding of the visual system through dedicated chapters and evolving discussion to serve as a clearing house for all things related to retina and vision science.. Contact: [email protected] ...
Special Topics courses for 2017-2018. IMGS-789-01 Robot Vision (Fall 2181). Special Topics courses for 2016-2017. IMGS-789-01 Deep Learning for Vision (Fall 2161). IMGS-789-01 Modern Astronomical Imaging (Spring 2165). IMGS-789-02 Introduction to Radiative Transfer In Media (Spring 2165). IMGS-789-03 Optical Components, System Design and Performance (Spring 2165). Special Topics courses for 2015-2016:. IMGS-789-01 Introduction to Radiative Transfer in Media (Spring 2155). IMGS-789-02 Interactive Virtual Environments (Spring 2155). IMGS-789-03 Optical Component, System Design and Performance (Spring 2155). Special Topics courses for 2014-2015:. IMGS-789-01 Introduction to Radiative Transfer in Media (Fall 2141). IMGS-789-01 Advanced Topics in Radiative Transfer in Media (Spring 2145). IMGS-789-02 Eye-tracking Methods (Spring 2145). IMGS-789-03 Optical Component, System Design and Performance Evaluation (Spring 2145). IMGS-789 Vision Science Seminar. Suggested Graduate Courses Offered Outside of ...
University of Oxford (UOXF) is one of the top research-led universities in the world, having consistently been ranked within the top 5 since 2005 in the THE-QS World University Rankings. The Medical Sciences Division at UOXF, containing the Department of Experimental Psychology, has recently ranked 1st in the world.. More specifically the OxVis research network supports collaboration in vision science. The scope of the group is wide, covering ocular and cortical components of vision and encompassing basic-science, clinical, computational and engineering approaches to human, animal and artificial vision.. ...
The other day I mentioned that Ive been studying visual cognition, and in particular Ive been reading Vision Science: Photons To Phenomenology, by Stephen
Dr. McCormack, a professor of optometry in the Vision Science Department, has been a faculty member at the college since 1976. He teaches Binocular Vision and Ocular Motility and co-teaches Binocular and…