197
197
Jun 17, 2010
06/10
by
Deboo, G. J.; Fryer, T. B
texts
eye 197
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No Abstract Available
Topics: LOW CURRENTS, MINIATURIZATION
194
194
Jun 19, 2010
06/10
by
Swartz, G. A
texts
eye 194
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No Abstract Available
Topics: MINIATURIZATION, SOLID STATE
219
219
May 20, 2014
05/14
by
MEGHNA SARKAR, K SREELAKSHMI & T P MITHUN
texts
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Fractal antennas are found to be advantageous because of their small size and multiband functionality. This paper proposes a composite miniaturized fractal antenna as a combination of Minkowski and Koch curves. The structure of the proposed antenna is the result of the modifications made with the basic fractal square and triangular curves. The design and simulation have been performed using a full-wave 3-dimensional electromagnetic simulator. The antenna can be used for most handheld devices...
Topics: Antenna, Fractal, Microstrip Feed, Miniaturization, Multiband
3
3.0
Dec 16, 2020
12/20
by
Bulletin of Electrical Engineering and Informatics
texts
eye 3
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In this paper, a compact triband printed antenna with hexagonal complementary split-ring resonators (CSRRs) for 4G applications is proposed. The proposed multiband antenna is comprised of a rectangular patch antenna on the top plane, while on the ground plane, hexagonal CSRRs are etched for size miniaturization (at the lower bands) and multiband generation. Another effect of the CSRR is the shifting of the initial resonance of the patch antenna from 5.17 GHz to the higher band of 6.18 GHz. The...
Topics: 4G, CSRR, Miniaturization, Patch antenna, Triband
151
151
Dec 27, 2016
12/16
by
Russell Hanson, Steve F. Russell, David Hallock
texts
eye 151
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A theoretical analysis of superheterodyne design principles has been presented with emphasis on noise figure, selectivity trade-off, spurious response, and image phasing mixers. Magnetically tunable filters have been examined on a theoretical and practical basis. Problems associated with uhf micro-miniaturization have been discussed. Examination of varactor tuning techniques and a consideration of large signal effects are presented. Distributed and active inductors and their relative advantages...
Topics: UHF RF Preselector, Microminiature, micro-miniaturization
13
13
Aug 24, 2019
08/19
by
BOGGS
audio
eye 13
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Two women in sports from Japan. Diplomatic problems between the SOUTH and Japan. Does the NORTH really have a nuke as small as a lunch box or could it be one of those suburban myths?
Topics: North Korea, South Korea, diplomats, nuke, miniaturization
A detailed description of the assembly procedure of the Floating Spacecraft Simulator (FSS) has been produced for the Naval Postgraduate School's Spacecraft Robotics Laboratory. This procedure has been used to assemble an additional FSS, resulting in a total of three operational units. The second part of the research effort was devoted to the design of a miniaturized version of the FSS. Due to the finite size of the testbed, it was desirable to reduce the footprint of the FSS to increase the...
Topics: spacecraft, robotics, miniaturization, docking, interface, mechanism, simulator
294
294
May 31, 2011
05/11
by
LeVine, David M.; Abraham, Saj
texts
eye 294
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The spectral window at L-band (1.4 GHz) is important for passive remote sensing of soil moisture and ocean salinity from space, parameters that are needed to understand the hydrologic cycle and ocean circulation. At this frequency, radiation from extraterrestrial (mostly galactic) sources is strong and, unlike the constant cosmic background, this radiation is spatially variable. This paper presents a modern radiometric map of the celestial sky at L-band and a solution for the problem of...
Topics: COOLERS, PORTABLE EQUIPMENT, HEATING, THERMOELECTRICITY, MINIATURIZATION, NASA SPACE PROGRAMS,...
178
178
May 31, 2011
05/11
by
Francis, Ronald C.; Settle, Gray; Tobbe, Patrick A.; Kissel, Ralph; Glaese, John; Blanche, Jim; Wallace, L. D
texts
eye 178
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This monthly report summarizes the work performed under contract NAS8-00114 for Marshall Space Flight Center in the following tasks: 1) Purchase Order No. H-32831D, Task Order 001A, GPB Program Software Oversight; 2) Purchase Order No. H-32832D, Task Order 002, ISS EXPRESS Racks Software Support; 3) Purchase Order No. H-32833D, Task Order 003, SSRMS Math Model Integration; 4) Purchase Order No. H-32834D, Task Order 004, GPB Program Hardware Oversight; 5) Purchase Order No. H-32835D, Task Order...
Topics: THERMOMETERS, IRON, PALLADIUM, THERMAL CONDUCTIVITY, STABILITY, MINIATURIZATION, CURIE-WEISS LAW,...
The Pan-STARRS 1 Telescope (PS1) is currently (2009 Aug) undergoing final commissioning efforts and starting to perform initial science observations for the PS1 survey mission. PS1 will greatly expand the known population of Brown Dwarfs, with discovery via photometry, proper-motion, and parallax.
Topics: DTIC Archive, NAVAL OBSERVATORY FLAGSTAFF AZ, *SURVEYS, *TELESCOPES, PHOTOMETRY, FACTOR ANALYSIS,...
Purpose: Assess In-Space NDE technologies and needs - current & future spacecraft. Discover & build on needs, R&D & NDE products in other industries and agencies. Stimulate partnerships in & outside NASA to move technologies forward cooperatively. Facilitate group discussion on challenges and opportunities of mutual benefit. Focus Areas: Miniaturized 3D Penetrating Imagers Controllable Snake-arm Inspection systems Miniature Free-flying Micro-satellite Inspectors
Topics: NASA Technical Reports Server (NTRS), NONDESTRUCTIVE TESTS, INSPECTION, MINIATURIZATION,...
The following issues are addressed in this essay: a) Models of Technology Trends: A discussion of why nanotechnology and related advanced technologies are inevitable. The underlying technologies are deeply integrated into our society and are advancing on many diverse fronts; and b) The Economic Imperatives of the Law of Accelerating Returns: The exponential advance of technology, including the accelerating miniaturization of technology, is driven by economic imperative, and, in turn, has a...
Topics: NASA Technical Reports Server (NTRS), ECONOMICS, MINIATURIZATION, NANOTECHNOLOGY, TRENDS,...
Microfiche viewers - The Taylor-Merchant Corp.
Topics: microfilm, microfiche, precision, microform, instant, miniaturization, retrieval, designed, west,...
204
204
Jun 12, 2011
06/11
by
Mason, Brian H.; Stroud, W. Jefferson; Krishnamurthy, T.; Spain, Charles V.; Naser, Ahmad S
texts
eye 204
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approach is presented for carrying out the reliability-based design of a plate-like wing that is part of a wind tunnel model. The goal is to design the wind tunnel model to match the stiffness characteristics of the wing box of a flight vehicle while satisfying strength-based risk/reliability requirements that prevents damage to the wind tunnel model and fixtures. The flight vehicle is a modified F/A-18 aircraft. The design problem is solved using reliability-based optimization techniques. The...
Topics: MINIATURIZATION, PAYLOADS, ROVING VEHICLES, MARS EXPLORATION, LANDING SITES, CRATERS, SPECTROSCOPY,...
An improved design for the backshell of a connector for a shielded, multiplewire cable reduces the size of the backshell, relative to traditional designs of backshells of otherwise identical cable connectors. Notwithstanding the reduction in size, the design provides all the functionality typically demanded of such a backshell, including (1) termination of the cable shield (that is, grounding of the shield to the backshell), (2) strain relief for the cable, and (3) protection against...
Topics: NASA Technical Reports Server (NTRS), ELECTRIC CONNECTORS, COAXIAL CABLES, MINIATURIZATION,...
319
319
May 22, 2011
05/11
by
Chen, Peter C. T
texts
eye 319
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This paper presents a nonlinear stress analysis of a thick-walled compound tube subjected to internal pressure. The compound tube is constructed of a steel liner and a graphite-bismaleimide outer shell. Analytical expressions for the stresses, strains, and displacements are derived for all loading ranges up to failure. Numerical results for the stresses and the maximum value that the compound tube can contain without failure are presented.
Topics: CRYOGENICS, ELECTRONIC EQUIPMENT, MEASURING INSTRUMENTS, MINIATURIZATION, PRESSURE SENSORS, DIES,...
Glenn Research Center awarded SBIR funding to Ann Arbor, Michigan-based Evigia Systems to develop a miniaturized accelerometer to account for gravitational effects in space experiments. The company has gone on to implement the technology in its suite of prognostic sensors, which are used to monitor the integrity of industrial machinery. As a result, five employees have been hired.
Topics: NASA Technical Reports Server (NTRS), ACCELEROMETERS, MINIATURIZATION, GRAVITATIONAL EFFECTS,...
Ultraminiature quartz resonators meeting the minimum Q requirement of 10,000 were fabricated at frequencies from below 9 mc to above 150 mc. Quartz plates as small as .100 inch in diameter gave satisfactory results over most of this frequency range. Contouring was necessary below 25 mc, but plane-parallel plates proved satisfactory above this frequency. Both ceramic and glass enclosures were developed for these resonators. The overall volume of these enclosures was less than .002 cubic inches....
Topics: DTIC Archive, Tyler, Len A, VICTOR COMPTOMETER CORP CHICAGO IL, *MINIATURIZATION, QUARTZ RESONATORS
237
237
May 31, 2011
05/11
by
Havelund, Klaus; Rosu, Grigor
texts
eye 237
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We describe recent work on designing an environment called Java PathExplorer for monitoring the execution of Java programs. This environment facilitates the testing of execution traces against high level specifications, including temporal logic formulae. In addition, it contains algorithms for detecting classical error patterns in concurrent programs, such as deadlocks and data races. An initial prototype of the tool has been applied to the executive module of the planetary Rover K9, developed...
Topics: BIOINSTRUMENTATION, GRAVITATIONAL PHYSIOLOGY, TECHNOLOGY TRANSFER, BIOTELEMETRY, RATS, IN VIVO...
10
10.0
texts
eye 10
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xiv, 372 pages, 13 unnumbered pages of plates : 25 cm
Topics: Biochip, Aufsatzsammlung, Biotechnology, Biochips, Biotechnology -- methods, Microelectronics,...
0
0.0
Jan 18, 2021
01/21
by
Steve Maddison (SteveMaddison)
data
eye 0
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Replica of the miniaturization chip prop from the 1987 movie _Innerspace_, with optional cufflink mount as featured at the end of the film. All parts are separate STL files, to allow multimaterial/color prints. For the "silicon" itself I'd recommend filing down a piece of scrap metal or something silver-coloured to the right size. The pins are included for completeness only - good luck printing them on their own ;) The holes are 0.018" (about 0.46 mm) so the body will take...
Topics: inner_space, movie_prop, movie, thingiverse, chip, prop, miniaturization, cufflink, Props, stl,...
The Pennsylvania State University has developed the Networked Robotic Systems Laboratory (NRSL) under several Defense University Instrumentation Program (DURIP) grants. The objective is to experimentally validate the results of theoretical research on mathematics of failures in sensor-network-based miniature multimodal mobile robots and electromechanical systems.
Topics: DTIC Archive, PENNSYLVANIA STATE UNIV STATE COLLEGE, *ROBOTS, COMPUTER NETWORKS, ELECTROMECHANICAL...
International Machinery Corporation (IMC) developed a miniature earthmover, the 1/8 scale Caterpillar D11N Track-type Tractor, with trademark product approval and manufacturing/marketing license from Caterpillar, Inc. Through Marshall Space Flight Center assistance, the company has acquired infrared remote control technology, originally developed for space exploration. The technology is necessary for exports because of varying restrictions on radio frequency in foreign countries. The Cat D11N...
Topics: NASA Technical Reports Server (NTRS), MINIATURIZATION, TECHNOLOGY UTILIZATION, TRACTORS, AEROSPACE...
It is an object of the invention to provide a miniature traveling wave tube which will have most of the advantages of solid state circuitry but with higher efficiency and without being highly sensitive to temperature and various types of electromagnetic radiation and subatomic particles as are solid state devices. The traveling wave tube which is about 2.5 cm in length includes a slow wave circuit (SWS) comprising apertured fins with a top cover which is insulated from the fins by strips or...
Topics: NASA Technical Reports Server (NTRS), MINIATURIZATION, TRAVELING WAVE TUBES, PATENTS, Kosmahl,...
454
454
Jun 26, 2011
06/11
by
Kacpura, Thomas J.; Handler, Louis M.; Briones, Janette; Hall, Charles S
texts
eye 454
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This paper describes an update of the Space Telecommunications Radio System (STRS) open architecture for NASA space based radios. The STRS architecture has been defined as a framework for the design, development, operation and upgrade of space based software defined radios, where processing resources are constrained. The architecture has been updated based upon reviews by NASA missions, radio providers, and component vendors. The STRS Standard prescribes the architectural relationship between...
Topics: SOLAR SENSORS, AEROSPACE ENGINEERING, GEOMAGNETISM, FORMATION FLYING, LAUNCH VEHICLES, SYNCHRONOUS...
235
235
Jun 18, 2010
06/10
by
NON
texts
eye 235
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ELECTRICAL PROPERTIES OF HIGH RELIABILITY COMPUTER GRADE MINIATURE CAPACITORS
Topics: CAPACITORS, ELECTRICAL PROPERTIES, MINIATURE ELECTRONIC EQUIPMENT, MINIATURIZATION, RELIABILITY,...
A small, simple fixture has been found to be highly effective in reducing destructive unsteady hydrodynamic loads on a miniature submarine that is attached in piggyback fashion to the top of a larger, nuclear-powered, host submarine. The fixture, denoted compact ramp, can be installed with minimal structural modification, and the use of it does not entail any change in submarine operations.
Topics: NASA Technical Reports Server (NTRS), LOADS (FORCES), SUBMARINES, STABILITY, MINIATURIZATION,...
A sensor testing system for sensing, control, and modeling of a quad-winged Micro Air Vehicle (MAV) has been built this work. This system contains two important components. One is an Agilent AFM system for microscopic static force measurement and calibration of the sensor system and another one is a Photron high-speed photogrammetry system for macroscopic dynamic motion-force measurement and verification. The unique capability of combining AFM and high speed camera has been shown it can provide...
Topics: DTIC Archive, WRIGHT STATE UNIV DAYTON OH, *DETECTORS, *DRONES, AERODYNAMICS, CONTROL, MICROSCOPY,...
Over the past decade the field of micro-electro-mechanical systems (MEMS) has attracted increased interest. Miniaturization of mechanical systems promise new directions in the progress of science and technology.
Topics: DTIC Archive, Datskos, P G, TENNESSEE UNIV KNOXVILLE, *MICROELECTROMECHANICAL SYSTEMS, OPTICAL...
Device can reproduce virtually all binocular stimulus conditions (target configuration, vergence angle, and accommodative distance) used to test binocular performance. All subsystems of electronic controls are open-loop and solid-state-controlled and, with the exception of vergence angle drive, utilize dc stepping motors as prime movers. Arrangement is also made for readouts of each variable.
Topics: NASA Technical Reports Server (NTRS), BINOCULAR VISION, BINOCULARS, MINIATURIZATION, OPTICAL...
186
186
Jun 3, 2011
06/11
by
Johnson, C. W.; Holloway, C. M
texts
eye 186
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The increasing complexity of many safety critical systems poses new problems for mishap analysis. Techniques developed in the sixties and seventies cannot easily scale-up to analyze incidents involving tightly integrated software and hardware components. Similarly, the realization that many failures have systemic causes has widened the scope of many mishap investigations. Organizations, including NASA and the NTSB, have responded by starting research and training initiatives to ensure that...
Topics: BUBBLES, SURFACE PROPERTIES, COALESCING, DROPS (LIQUIDS), MINIATURIZATION, VISCOUS FLUIDS,...
248
248
Jun 13, 2011
06/11
by
Blom, Ronald; LaBrecque, John; Dobson, Crai
texts
eye 248
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GOALS: How do magmatic systems evolve and volcanoes erupt How the dynamics of the mantle and crust deform Earth s surface What are the dynamics of the Earth s magnetic field and its interactions with the Earth system How do plate boundaries deform & create earthquake hazards How do tectonics and climate interact to shape the Earth s surface What are sea level implications from ice masses, oceans, and the solid Earth
Topics: AEROSPACE ENGINEERING, DEPLOYMENT, MINIATURIZATION, DIGITAL ELECTRONICS, ELECTROMECHANICS,...
The threat of nuclear proliferation remains a critical issue in our society. Prevention requires knowledge, and there is no greater indicator of the capability and intent of a nation than observation of actual detonation tests being conducted. Ground-based monitoring systems have proven to be very capable in identifying nuclear tests and can provide somewhat precise information on the location and yield of the explosive device. Making these measurements, however, currently requires very...
Topics: DTIC Archive, SYMPHONY ACOUSTICS INC RIO RANCHO NM, *SEISMOMETERS, INTERFEROMETERS,...
314
314
Jun 26, 2011
06/11
by
NON
texts
eye 314
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Production of high molecular weight polyisoprene latex is enhanced by administering to plants, particularly Guayule Plants, an amine containing at least one two-carbon chain substituent and preferably substituted trialkylamine of the general structure: ##STR1## where R.sub.4, R.sub.5 and R.sub.6 are alkyl, preferably ethyl and at least one of R.sub.4, R.sub.5 and R.sub.6 is preferably an electron withdrawing group substituted aryloxy or arylthio ethyl group.
Topics: MOSSBAUER EFFECT, TARGETS, X RAY SPECTRA, PENETRATION, SOILS, MARS SURFACE, MINERALOGY,...
This project aims to demonstrate the feasibility of miniature, inexpensive, in vivo robots to provide basic diagnosis and triage in military environments. This work comprises the first phase of a two phase project. The first phase focuses on the design and construction of an in vivo camera robot. The robot will be designed to be fully inserted into a patient and, in a future project, tested in patients. The robot will return live in vivo video images that allow the surgeon to explore, diagnose,...
Topics: DTIC Archive, NEBRASKA UNIV MEDICAL CENTER OMAHA, *ROBOTICS, *SURGERY, ABDOMEN, CAMERAS,...
Early in the space program, NASA recognized the need to replace bulky coils, compressers, and motors for refrigeration purposes by looking at existing thermoelectric technology. This effort resulted in the development of miniaturized thermoelectric components and packaging to accommodate tight confines of spacecraft. Koolatron's portable electronic refrigerators incorporate this NASA technology. Each of the cooler/warmers employs one or two miniaturized thermoelectric modules. Although each...
Topics: NASA Technical Reports Server (NTRS), COOLERS, PORTABLE EQUIPMENT, HEATING, THERMOELECTRICITY,...
A hand controller provides up to three axes of motion, and all required feel characteristics (stiffness and breakout torques) located inside a hollow handle within the grip of the hand.
Topics: NASA Technical Reports Server (NTRS), CONTROLLERS, MINIATURIZATION, HAND (ANATOMY), STIFFNESS,...
An electrical connector assembly includes a wire bundle having at least one wire with a metal shield surrounding at least a portion of the wire. The shield has an end portion and provides electromagnetic interference protection to the wire. A backshell includes a body and a cover secured to the body together defining an internal cavity with the wire at least partially arranged within the cavity. The backshell provides EMI protection for the portion of the wire bundle not covered by the shield....
Topics: NASA Technical Reports Server (NTRS), BUNDLES, ELECTRIC CONNECTORS, MINIATURIZATION, WIRE, PATENTS,...
A device/system for radiation sensing is configured to detect high and low LET radiation. The radiation sensing system may include a high LET detector and a low LET detector coupled to the high LET detector by a CPU, wherein the high LET detector and the low LET detector are assembled within a single unit. The device/system may also include a high LET and low LET detector that may be coupled together without an internal CPU. Overall, the device/system may be a stand-alone system and/or coupled...
Topics: NASA Technical Reports Server (NTRS), RADIATION DETECTORS, MINIATURIZATION, SPECTROMETERS,...
In the 1990s, a Jet Propulsion Laboratory team led by Eric Fossum researched ways of improving complementary metal-oxide semiconductor (CMOS) image sensors in order to miniaturize cameras on spacecraft while maintaining scientific image quality. Fossum s team founded a company to commercialize the resulting CMOS active pixel sensor. Now called the Aptina Imaging Corporation, based in San Jose, California, the company has shipped over 1 billion sensors for use in applications such as digital...
Topics: NASA Technical Reports Server (NTRS), IMAGE RESOLUTION, IMAGING TECHNIQUES, CAMERAS, DETECTORS,...
231
231
May 23, 2011
05/11
by
Jessup, J. Milbur
texts
eye 231
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The hypothesis of this ground-based project was that simulated microgravity may be used to recreate with high fidelity the in vivo environment in tissue culture. The objectives were to determine whether: (1) simulated microgravity induces differentiation within poorly differentiated human colon carcinoma cells that are similar to that observed in experimental metastases in vivo in nude mice; and (2) the use of simulated microgravity helps define the experimental metastatic potential of human...
Topics: MILLIMETER WAVES, TRAVELING WAVES, MICROWAVE PROBES, IMPEDANCE, SLOT ANTENNAS, ANTENNA RADIATION...
382
382
May 27, 2011
05/11
by
Hurwitz, F. I.; Meador, M. A. B
texts
eye 382
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Blackglas(Trademark) polysiloxane systems produce silicon oxycarbide glasses by pyrolysis in inert atmosphere. The silicon oxycarbides evidence oxidative degradation that limits their lifetime as composite matrices. The present study characterizes bonding rearrangements in the oxycarbide network accompanying increases in pyrolysis temperature. It also addresses the changes in susceptibility to oxidation due to variations in the distribution of Si bonded species obtained under different...
Topics: AMPLIFIER DESIGN, OPERATIONAL AMPLIFIERS, TRANSDUCERS, SIGNAL PROCESSING, PRODUCT DEVELOPMENT,...
1,067
1.1K
May 31, 2011
05/11
by
Shepherd, J. Marshall; Mehta, Amit
texts
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This report provides a synopsis of the proceedings of the First Global Precipitation Measurement (GPM) Partners Planning Workshop held at the University of Maryland, College Park, from May 16 to 18, 2001. GPM consists of a multi-member global satellite constellation (i.e., an international set of satellite missions) and the accompanying scientific research program, with the main goal of providing frequent, accurate, and globally distributed precipitation measurements essential in understanding...
Topics: AUTONOMY, ROTARY WING AIRCRAFT, RESEARCH AND DEVELOPMENT, ROTARY WINGS, DEFENSE PROGRAM, TRANSPORT...
This document reports the extent of the progress attained by Lockheed Martin Astronautics (LMA) in the development of equipment designed for the miniature Comet Ice and Dust EXperiment (mini-CIDEX) on NASA contract No. NAS2-14042 from the Ames Research Center (ARC). This report is in two parts. The first part summarizes progress in chronological order. The contents of the first part have been extracted from the monthly reports submitted by LMA to ARC over the duration of the program. The second...
Topics: NASA Technical Reports Server (NTRS), COMETARY ATMOSPHERES, INTERPLANETARY DUST, MINIATURIZATION,...
MEMS (MicroElectroMechanical Systems) are a new frontier in miniaturization. Optics and MEMS have a natural synergism. On the one hand, optical techniques are basic to the manufacturing of MEMS. On the other hand, a wide variety of MEMS have already been demonstrated to produce, manipulate or detect optical radiation. The "optical" range of wavelengths is from 0.2 micrometers in the ultraviolet to 12 micrometers in the far infrared region. Entire optical systems with volumes on the...
Topics: DTIC Archive, Walker, Steven J., NAVAL RESEARCH LAB WASHINGTON DC, *OPTICS, *MICROELECTROMECHANICAL...
A miniature electrostatic ion thruster is proposed that, with one exception, would be based on the same principles as those of the device described in the previous article, "Miniature Bipolar Electrostatic Ion Thruster". The exceptional feature of this thruster would be that, in addition to using electric fields for linear acceleration of ions and electrons, it would use a magnetic field to rotationally accelerate slow electrons into the ion stream to neutralize the ions.
Topics: NASA Technical Reports Server (NTRS), ELECTROSTATICS, ION ENGINES, MINIATURIZATION, MAGNETS,...
Miniature blimps are under development as robots for use in exploring the thick, cold, nitrogen atmosphere of Saturn's moon, Titan. Similar blimps can also be used for surveillance and collection of biochemical samples in buildings, caves, subways, and other, similar structures on Earth. The widely perceived need for means to thwart attacks on buildings and to mitigate the effects of such attacks has prompted consideration of the use of robots. Relative to rover-type (wheeled) robots that have...
Topics: NASA Technical Reports Server (NTRS), MINIATURIZATION, ROBOTS, SURVEILLANCE, TITAN ATMOSPHERE,...
The vapor-cell atomic clock finds application today in the global positioning system and telecommunications. To improve and miniaturize the humble device for future applications will require a deeper understanding of atomic and chemical physics.
Topics: DTIC Archive, AEROSPACE CORP EL SEGUNDO CA PHYSICAL SCIENCES LABS, *RUBIDIUM, *ATOMIC CLOCKS,...
The device described here measures the torque-tension relationship for fasteners as small as #0. The small-bolt tester consists of a plate of high-strength steel into which three miniature load cells are recessed. The depth of the recess is sized so that the three load cells can be shimmed, the optimum height depending upon the test hardware. The three miniature load cells are arranged in an equilateral triangular configuration with the test bolt aligned with the centroid of the three. This is...
Topics: NASA Technical Reports Server (NTRS), BOLTS, MEASURING INSTRUMENTS, MINIATURIZATION, TORQUE, HIGH...
420
420
May 28, 2011
05/11
by
NON
texts
eye 420
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Recently, the geology of the surface of Vesta has been coming to light. In 1983 Gaffey first began showing maps of the surface geology of Vesta constructed from numerous spectra obtained at different times as the asteroid rotated. By noting the details of spectral variation with rotation, he was able to develop two possible gross-scale geologic maps of Vesta showing the distributions of mafic and ultramafic materials. These maps were published in 1997. Finally, the capabilities of the Hubble...
Topics: MINIATURIZATION, PAYLOADS, VOLUME, WEIGHT (MASS), FIBER OPTICS, FABRICATION, SPECTROMETERS,...
