112
112
Feb 9, 2014
02/14
by
Salle Pierre Lamy
audio
eye 112
favorite 0
comment 0
edgar and Bryce discuss and describe... inFORM, Stationary observation system for high speed flying objects, Sivaji, The Boss, It's such a beautiful day, Don Hertzfeldt, Burrito Galaxy, Candy Box 2, Banksy SPLARPY by Erika and Mike, Sweet tunes from Stanley Brinks and the Wave Pictures, Vile Electrodes, Monkeys in Love, Selma Kurz, Jim Russell, and MUCH MUCH MORE
Topics: inFORM, Stationary observation system for high speed flying objects, Sivaji, The Boss, It's such a...
0
0.0
Jan 16, 2021
01/21
by
Franci Kopac (fkopac)
data
eye 0
favorite 0
comment 0
An EEG electrodes holder for a basic 7-electrode EEG setup using g.SAHARA electrodes. This is my entry in the Ars Electronica 2017 Br41n.IO hackathon, awarded the second place. A result of ~6 hours of design, it is still quite rough around the edges, but a good starting point for further refinement. I have attached the STEP file if you want to play with it. The decorative legs are aligned with the electrode placement lines, so it is easy to add additional electrodes. A big Thank You to the...
Topics: g.SAHARA, thingiverse, ant, holder, EEG, headset, Other, stl, electrodes
The objectives of the program are to provide design criteria for long life, light weight silver-zinc batteries for military aerospace applications. Effort is concentrated on the zinc electrode and separator since these are recognized as the major causes of premature failure of the silver-zinc battery.
Topics: DTIC Archive, Keralla, J A, GENERAL MOTORS CORP ANDERSON IN DELCO-REMY DIV, *ELECTRODES, *STORAGE...
Device, which protects insulated gate field-effect transistors, improves reliability through utilization of layers of conductive material on top of each alternating semiconductor material region. Separation of layers is necessary to prevent shorting out junctions between alternating regions.
Topics: NASA Technical Reports Server (NTRS), DIELECTRICS, DIODES, ELECTRIC CONNECTORS, ELECTRODES, FIELD...
326
326
Aug 2, 2010
08/10
by
Brenton, Brian; Chambers, Ernest; Schwind, Thomas; Swanhart, Christopher; Williams, Thoma
texts
eye 326
favorite 0
comment 0
The current Lower Earth Orbit (LEO) environment has become overly crowded with space debris. An evaluation of types of debris is presented in order to determine which debris poses the greatest threat to operation in space, and would therefore provide a feasible target for removal. A target meeting these functional requirements was found in the Cosmos C-1B Rocket Body. These launchers are spent space transporters which constitute a very grave risk of collision and fragmentation in LEO. The...
Topics: ELECTRODES, BOILER PLATE, CYCLES, ELECTRIC POTENTIAL, HYDROXIDES, SINTERING, STABILITY,...
An overview of the NiH2 cell development is given. The NiH2 SAFT system is an electrochemical (single or dual) stack (IPV). The stack is mounted in an hydroformed Inconel 718 vessel operating at high pressure, equipped with 'rabbit ears' ceramic brazed electrical feedthroughs. The cell design is described: positive electrode, negative electrode, and stack configuration. Overviews of low earth orbit and geostationary earth orbit cyclings are provided. DPA results are also provided. The cycling...
Topics: NASA Technical Reports Server (NTRS), EARTH ORBITAL ENVIRONMENTS, GEOSYNCHRONOUS ORBITS, NICKEL...
A new floating double-probe method is presented which has advantages over other floated-probe systems previously described in literature. The method utilized two electrodes, one of constant area and the other with a variable area. The two-electrode configuration is separated by a fixed bias voltage. The current-voltage characteristics of the new technique, which are generated by varying the area of the one electrode, are identical to those of a simple Langmuir probe, thus coupling all the...
Topics: NASA Technical Reports Server (NTRS), BIAS, PLASMA DENSITY, PLASMA TEMPERATURE, ELECTRODES,...
4
4.0
texts
eye 4
favorite 0
comment 0
11 v. 24 cm
Topics: Chemistry, Analytic, Electrodes, Spectrophotometer
2
2.0
texts
eye 2
favorite 0
comment 0
11 v. 24 cm
Topics: Chemistry, Analytic, Electrodes, Spectrophotometer
1
1.0
texts
eye 1
favorite 0
comment 0
x, 448 p. : 26 cm
Topics: Electrodes, Ion selective -- Congresses, Electrophysiology -- Technique -- Congresses,...
A summary is presented of an investigation on the development of electrochemical tools for studying the electrode-electrolyte interface and on their application to systems of interest. A triangular sweep generator was designed and constructed for use with potential sweeping experiments, and the palladium-hydrogen electrode was studied. Two new techniques for the measurement of double-layer capacitance at solid electrodes were also developed. Capacitance measurements were made on silver...
Topics: DTIC Archive, PRINCETON UNIV NJ DEPT OF CHEMISTRY, *ELECTRODES, CAPACITANCE, ELECTRIC DOUBLE LAYER,...
Processes for the manufacture of phosphoric acid fuel cell components are described. Electrodes, matrices and bipolar gas distribution plates for use in fuel cells with an active area of approximately 0.4 sq. ft. is fabricated. Samples from these components have been tested in fuel cells and all items have demonstrated life in excess of 1000 hours. Performance data is given.
Topics: DTIC Archive, Baker, Bernard S., ENERGY RESEARCH CORP DANBURY CT, *FUEL CELLS, MANUFACTURING,...
This report describes an instrumental method of analysis to provide a direct-reading emission spectroscopic technique to the problem of analyzing oil-base paints for low-level concentrations of lead or any other element of interest.
Topics: DTIC Archive, Emeric,Dario A, ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR...
Research during the past year has been concentrated on the developement of the InP optoelectronic switch and on the evaluation of this switch as an electronic mixer. This type of mixer appears well suited for use in a time-integrating correlator which employs a heterodyne detector array. In such an array, a small high-quality mixer is crucial. InP optoelectronic switches have been fabricated using interdigitated-finger electrode structures with finger and space lengths varying from 6...
Topics: DTIC Archive, Foyt,Arthur G, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *Correlators,...
Porous conductive supports for electrochemical cell electrodes are made by electroforming thin corrugated nickel foil, and by stacking pieces of the corrugated foil alternatively with pieces of thin flat nickel foil. Corrugations in successive corrugated pieces are oriented at different angles. Adjacent pieces of foil are bonded by heating in a hydrogen atmosphere and then cutting the stack in planes perpendicular to the foils.
Topics: NASA Technical Reports Server (NTRS), ELECTRODES, MANUFACTURING, METAL FOILS, POROUS MATERIALS,...
Several tests of specially fabricated nickel-cadmium batteries having circular disk type electrodes were considered. These batteries were evaluated as filter elements between a constant current power supply and a five hertz pulsed load demanding approximately twice the power supply current during the load on portion of the cycle. Short tests lasting 10,000 cycles were conducted at up to a 21 C rate and an equivalent energy density of over 40 Joules per pound. In addition, two batteries were...
Topics: NASA Technical Reports Server (NTRS), ELECTRIC FILTERS, ELECTRODES, EVALUATION, NICKEL CADMIUM...
Ion source systems in different configurations, have been used to generate unique morphologies for several NASA space applications. The discharge chamber of a 30 cm ion source was successfully used to texture potential space radiator materials for the purpose of obtaining values of thermal emittance greater than 0.85 at 700 and 900 K. High absorptance surfaces were obtained using ion beam seed texturing, for space radiator materials that were flown on the Long Duration Exposure Facility (LDEF)...
Topics: NASA Technical Reports Server (NTRS), ION BEAMS, ION SOURCES, LONG DURATION EXPOSURE FACILITY,...
The feasibility of developing continuous photoconductive layer arrays for mapping applications was studied. The procedures for preparing both the zinc oxide binder resin, and the undoped sintered cadmium sulfide, continuous photoconductive layers are presented. Special configuration area arrays with large multi-electrodes for beam centering purposes and for diffraction pattern detectors were devised. The mapping applications of the chemical arrays such as position detection, area, and center of...
Topics: DTIC Archive, Chen,Pi-Fuay, ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA, *IMAGE PROCESSING,...
In single-crystal electrochemical studies, various researchers have prepared the electrode surfaces by mechanical polishing followed by chemical polishing without further cleaning or high temperature annealing in vacuo. The quality of such single-crystal surfaces is in question. The present work has involved the use of LEED (Low Energy Electron Diffraction) and Auger electron spectroscopy (AES) to examine the order and purity of the silver (111) and (100) surfaces after preparation with such...
Topics: DTIC Archive, Adzic,R R, CASE-WESTERN RESERVE UNIV CLEVELAND OH, *Silver, *Electrodes, *Single...
This report focuses attention on the neglected gas-heating stage associated with a spark. A brief review is followed by summaries of recent experimental and theoretical investigations. It is shown that in all cases gas heating is preceded by the formation of a weakly ionized plasma. The transformation to a strongly ionized gas requires additional ionization that can be associated with several different physical processes. In small gaps (3.0 mm) with metal electrodes, the influx of electrons...
Topics: DTIC Archive, Barreto, Ernesto, STATE UNIV OF NEW YORK AT ALBANY ATMOSPHERIC SCIENCES RESEARCH...
An instrument of general applicability constructed to automatically measure the capacitance (or impedance) of battery cells is described. Full, automatic, electrical characterization of a battery cell by a single device is made possible with the instrument's added ability to be programmed to charge and discharge the cells. The capacitance can be monitored with a precision of 0.05% and an accuracy of 1%. Data are presented for the capacitance of the nickel electrode at low states of charge as an...
Topics: DTIC Archive, Zimmerman,A H, AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB, *MEASUREMENT,...
Pure carbon was used as an electrode in the clinical application of long-term neuromuscular stimulation, as well as a connector for permanent neuroelectrodes. The history of this material and some examples of the material in use are presented.
Topics: NASA Technical Reports Server (NTRS), CARBON, ELECTRIC CONNECTORS, IMPLANTED ELECTRODES (BIOLOGY),...
A system is described for measuring the distance to an object by comparing a first component of a light pulse that is reflected off the object with a second component of the light pulse that passes along a reference path of known length, which provides great accuracy with a relatively simple and rugged design. The reference path can be changed in precise steps so that it has an equivalent length approximately equal to the path length of the light pulse component that is reflected from the...
Topics: NASA Technical Reports Server (NTRS), COMPUTERS, INTERFEROMETRY, LASER OUTPUTS, LIGHT BEAMS,...
A metal-hydrogen cell is described which avoids damage and retards flooding of the hydrogen electrodes by providing for chemical recombination of oxygen and hydrogen in areas or sites remote from the hydrogen electrodes. In the metal-hydrogen cell, a plurality of electrical cell units are place in a back to back relationship. The cells may be lined with a wick, having one or more catalyzed sites on the inner surface of the cell. Separators disposed between the respective metal and hydrogen...
Topics: NASA Technical Reports Server (NTRS), NICKEL HYDROGEN BATTERIES, OXYGEN, PRESSURE VESSELS,...
Phase detection interferometric microscopy (PDIM) was used to obtain high resolution surface images of 100 micro m diameter iron disk exposed to 0.1M H2SO4. The initiation and growth of corrosion pits at short time (0-30 sec) were observed on relatively smooth regions of the Fe surface (r.m.s. surface roughness approx. 5.5 nm). The growth of pits at open circuit was measured with 1 nm resolution from the time of initiation to depths of 50 nm. The rate of vertical pit growth from PDIM analysis...
Topics: DTIC Archive, Kragt, Harlan J, MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND...
Potentiodynamic data were obtained under argon for the mononuclear species tetraneopentoxyphthalocyaninatocobalt (II) species adsorbed on glassy carbon (GC), ordinary pyrolytic graphite (OPG) and highly oriented pyrolytic graphite (HOPG). Comparative data show that the most convenient material to use is HOPG whereon a limiting monolayer is apparently achieved. Data were also presented for the mononuclear and polynuclear analogues on HOPG under both argon and dioxygen. Comparison is made of the...
Topics: DTIC Archive, Janda, P, YORK UNIV NORTH YORK (ONTARIO) DEPT OF CHEMISTRY, *ELECTRODES, *COBALT...
Simple techniques are described for construction of a discharge channel, and spark gap trigger electrode for a travelling-wave excited molecular hydrogen laser.
Topics: DTIC Archive, Babis,J S, ARIZONA UNIV TUCSON DEPT OF CHEMISTRY, *MOLECULAR LASERS, HYDROGEN,...
The impedance of porous nickel electrodes has been measured under conditions of steady-state oxygen evolution. Significant effects are observed due to the pore structure of the electrodes, and these effects are found to correlate with loading levels, performance, and composition. The oxygen evolution characteristics of sintered plate electrodes have been investigated as a convenient means for determining the structural uniformity and the overall quality of such plates for use as battery...
Topics: DTIC Archive, Zimmerman,Albert H, AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB,...
Determination of the thermochemical, structural and basic electrochemical properties of mixed electronic/ionic conductors was successfully carried out on the following systems: H(x)MoO3, Li(x)V2O5, H(x)WO3, and Li(x) MoO3. Attempts to design new protonic and Li(+)ion conductors have opened up two fields: One is the recognition of particle hydrates as protonic electrolytes capable of fabrication into dense ceramics by cold pressing; we have obtained room-temperature H(+)ion conductivity...
Topics: DTIC Archive, Goodenough, John B, OXFORD UNIV (UNITED KINGDOM) INORGANIC CHEMISTRY LAB, *HYDROGEN...
The energetics of pyridine adsorption onto a gold (110) surface have been characterized quantitatively using chronocoulometry. The adsorption parameters such as relative Gibbs surface excesses, Gibbs energies of adsorption, and electrosorption valencies have been determined as a function of the electrode potential and the surface-charge density. The maximum surface excess is equal to 6.1 x 10 to the minus 10 mol 1/centimeters squared, the Gibbs energy at the potential of maximum adsorption is...
Topics: DTIC Archive, Stolberg, L, WATERLOO UNIV (ONTARIO) DEPT OF CHEMISTRY, *SURFACES, *PYRIDINES,...
Continuing support by O.N.R. has enabled the Southampton group to continue and develop their efforts in three areas in which they might make a claim to have been pioneers - the in situ vibrational spectroscopic study of electrode-electrolyte interfaces, detailed investigations of ultra microelectrodes and the structure and properties of polymers rapidly solidified from their melts. In the report given below we briefly outline progress laying the heaviest emphasis on the newest results. For a...
Topics: DTIC Archive, Hendra, P J, SOUTHAMPTON UNIV (UNITED KINGDOM) DEPT OF CHEMISTRY, *POLYMERS,...
A theory has been developed which describes the diffusion-limited current flowing at a finite disk electrode embedded in an infinite insulating plane. The theory has been confirmed experimentally using electrode arrays prepared from glassy carbon substrates overlaid by insulating resist material. (Author)
Topics: DTIC Archive, Osteryoung,Janet G, STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY,...
Journal of Research of the National Bureau of Standards
Topics: acid rain, glass electrodes, low ionic-strength solutions, main effects, pH measurements,...
16
16
Dec 23, 2019
12/19
by
Geddes, L. A. (Leslie Alexander), 1921-
texts
eye 16
favorite 0
comment 0
xv, 364 pages 23 cm
Topics: Electrodes, Electrophysiology, Membrane Potentials, Électrodes, Électrophysiologie, Elektrische...
11
11
audio
eye 11
favorite 0
comment 0
Topics: Radio Program, Legal professions, Legislatures, American businesspeople, Chief executive officers,...
Topics: DTIC Archive, DELAHAY, PAUL, LOUISIANA STATE UNIV BATON ROUGE, *IONS, *ELECTRIC DOUBLE LAYER,...
Topics: DTIC Archive, Lomax, R J, MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB, *ELECTRON BEAMS, *ELECTRON...
It is desirable to employ a corrosion screening test for catalyst or support candidates for the fuel cell cathode before entering upon optimization of the candidate or of the catalytic electrode. To this end, corrosion test electrodes, intended for complete immersion and maximum wetting, have been made with 30 to 40 vol. pct Teflon; with perovskites this is about 10 to 15 pct. The candidates were synthesized by methods intended for single-phase product without special emphasis on high surface...
Topics: NASA Technical Reports Server (NTRS), ALKALINE BATTERIES, CELL CATHODES, CORROSION TESTS,...
Topics: DTIC Archive, Broadbent, E G, ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM),...
The goal of this project is to acquire high performance Electroencephalogram (EEG) systems that enable real-time measurement of human brain activities at high spatial-temporal resolution in both laboratory and real-life environments. Our long-term vision is to develop a strong research and education center on brain machine interaction (BMI) at the University of Texas at San Antonio (UTSA). By acquiring this system, we will significantly advance the ability of the UTSA faculty to conduct...
Topics: DTIC Archive, Huang,Yufei, University of Texas at San Antonio San Antonio United States, real time,...
The barnacle electrode, an electrochemical device based on the hydrogen permeation method, was used, in conjunction with sustained load tests, to index the degree of embrittlement of 4340 steel. Flat, double notched tensile specimens of 250 ksi (1725 MPa) notched tensile strength and having a K sub T of 5.6 were shown to have a critical diffusible hydrogen concentration of 1.9, 1.7, 1.4, 1.2, 0.9 and 0.5 ppm for loads of 15, 20, 25, 30, 35 and 40 percent of the notched tensile strength. (Author)
Topics: DTIC Archive, Berman,D A, NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE TECHNOLOGY DEPT,...
The open circuit impedance of 10-A h sealed NiCd cells has been measured from 0 to 100,00 Hz as a function of cell state of charge and temperature. The open-circuit impedance at frequencies below 0.01 Hz is modeled by two consecutive diffusion-controlled charge transfer processes in the NiCd cell. Data analysis indicates that both solid-state diffusion processes and electrolyte diffusion processes are consistent with the data. Because concentration polarization is known to occur in NiCd cells,...
Topics: DTIC Archive, Zimmerman,A H, AEROSPACE CORP EL SEGUNDO CA, *Nickel cadmium batteries, *Electrolytic...
0
0.0
texts
eye 0
favorite 0
comment 0
1 online resource (xvi, 400 pages) :
Topics: Ion-Selective Electrodes, Indicators and Reagents, Ion, Magnetic Resonance Spectroscopy,...
An extemely lightweight type of precision reflector antenna, being developed for potential deployment from the space shuttle, uses electrostatic forces to tension a thin membrane and form it into a concave reflector surface. The typical shuttle-deployed antenna would have a diameter of 100 meters and an RMS surface smoothness of 10 to 1 mm for operation at 1 to 10 GHz. NASA Langley Research Center built and is currently testing a subscale (16 foot diameter) model of the membrane reflector...
Topics: NASA Technical Reports Server (NTRS), ANTENNA DESIGN, ELECTROSTATICS, MEMBRANE STRUCTURES, PAYLOAD...
Carbons activated with macrocyclics have attracted increasing attention as alternative electrocatalysts for oxygen reduction. Initial activity of these catalysts is good, but performance declines rapidly. Pyrolyzing the macrocyclic on the carbon support leads to enhanced stability and the catalysts retain good activity. The approach described is designed to develop bulk doped catalysts with similar structures to pyrolyzed macrocyclic catalysts. The transition metal and coordinated ligands are...
Topics: NASA Technical Reports Server (NTRS), ELECTROCATALYSTS, ELECTRODE MATERIALS, ELECTRODES, FUEL...
Bio-impedance can be used for peripheral pulse detection as a non-invasive method for continuous vital sign monitoring. The objective of this study was to evaluate the commercially available electrode materials that might be useful as wearable electrodes for the measurement of bio-impedance puse wave, to measure pulse variability, and test pulse detection sensitivity. Electrode down-selection was performed based on in vivo studies. A total of 13 conductive materials and 13 subjects were...
Topics: DTIC Archive, Bodo, Michael, WALTER REED ARMY INST OF RESEARCH SILVER SPRING MD, *DETECTION, *IN...
A vapor phase growth system intended for the growth of bulk gallium nitride crystals was investigated. Potential advantages of the growth technique are cheap source materials of high purity, no corrosive gasses, and low operating and equipment costs. Ga contained in a crucible was evaporated by an arc discharge between a W-electrode and the Ga surface, and was transported to the growth zone by a carrier gas flowing over the Ga source. After mixing with ammonia, the mixture was passed between a...
Topics: DTIC Archive, Heikman, Sten J, CALIFORNIA UNIV SANTA BARBARA, *EPITAXIAL GROWTH, *VAPOR PHASES,...
The authors present a detailed description of the microfabrication and operation at room temperature of a novel type of tunnel displacement transducer. Instead of a feedback system, it relies on a large reduction factor, assuring an inherently stable device. Stability measurements in the tunnel regime infer an electrode stability within 3 pm in a 1 kHz bandwidth. In the contact regime, the conductance takes on a discrete number of values when the constriction is reduced atom by atom. This...
Topics: DTIC Archive, Zhou, C, YALE UNIV NEW HAVEN CT CENTER FOR MICROELECTRONIC MATERIALS AND STRUCTURES,...
Process design, development and integration to fabricate reliable MEMS devices on top of VLSI-CMOS electronics without damaging the underlying circuitry have been investigated throughout this dissertation. Experimental and theoretical results that utilize two ?Post-CMOS? integration approaches will be presented. The first integration approach uses SiGe MEMS technology for the ?Post-CMOS? monolithic integration of the MEMS devices with electronics. Interconnects between SiGe MEMS and Al-TiN...
Topics: DTIC Archive, Eyoum, Marie-Angie N, CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND...
A low loss 4-6 GMz 3-bit tunable filter was designed and fabricated on a quarz substrate. A high-Q 3-bit orthogonal RF-MEMS capacitance network is presented and its significance on the filter Q is discussed. Detailed design equations for the capacitively-loaded coupled open-loop,=2 resonators and realization of capacitive external coupling with source-load impedance loading are discussed. The measured filter shows an unloaded-Q of 85-170, an insertion loss of 1.5-2.8 dB (including connector...
Topics: DTIC Archive, Sarabandi, Kamal, MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER...
