Note: This page contains sample records for the topic venetian sun-shading device from Science.gov.
While these samples are representative of the content of Science.gov,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of Science.gov
to obtain the most current and comprehensive results.
Last update: November 12, 2013.
1

Experimental study of a mechanically ventilated double-skin facade with venetian sun-shading device: A full-scale investigation in controlled environment  

SciTech Connect

The aim of this article is to present results of an experimental campaign performed on a full-scale facility provided with a double-skin facade. The behaviour of this architectural concept is tested under controlled climatic conditions. A summer case is scrutinised under different configurations: variation of the airflow through the double-skin facade and different angle of the solar shading device. This paper describes the experimental conditions, as well the test facility and the tested facade element. The results show the temperatures of the test cell and the facade and how they depend on the climatic conditions and the sun-shading device blade angles. One objective of this research was to measure and provide extensive data set detailing air and surface temperatures on the double-skin facade, together with airflow rates and air velocities. The experiments are fully described so that the results can be used for the validation of numerical models dealing with ventilated double-skin facades with venetian sun-shading device. (author)

Gavan, Valentin [CSTB, 84, Av. Jean Jaures, Champs sur Marne, Marne-la-Vallee, F-77447 (France); Universite de Lyon, CNRS; INSA-Lyon, CETHIL, UMR5008, F-69621, Villeurbanne, France; Universite Lyon 1, F-69622 (France); Woloszyn, Monika; Kuznik, Frederic; Roux, Jean-Jacques [Universite de Lyon, CNRS; INSA-Lyon, CETHIL, UMR5008, F-69621, Villeurbanne, France; Universite Lyon 1, F-69622 (France)

2010-02-15

2

Measured Performance of a 1089 K (1500 Deg F) Heat Storage Device for Sun-Shade Orbital Missions.  

National Technical Information Service (NTIS)

Tubes designed for a solar heat receiver to serve as an energy source for a Brayton power system were tested for 2002 hours and 1251 sun-shade cycles. The tubes were designed to transfer a constant thermal input to the Brayton system during an orbit. Exce...

D. Namkoong

1972-01-01

3

Evaluation of overheating protection with sun-shading systems  

Microsoft Academic Search

Sun-shading systems have to provide thermal and visual comfort both reliably and economically. At the same time, they should prevent unwanted solar gains in summer and permit high solar gains in winter. This paper describes a method to assess the overheating protection offered by different types of sun-shading systems together with the associated control strategy.The objective of the new method

Tilmann E Kuhn; Christopher Bühler; Werner J Platzer

2001-01-01

4

Sun Shading Diagrams for School Buildings. Educational Building Report 2.  

ERIC Educational Resources Information Center

This publication provides data on the angles governing the design of sunshading devices for educational buildings in the countries of the Asian region and gives examples of the ways in which these data can be used. Different methods of excluding direct sunlight from teaching spaces are illustrated in a series of diagrams that show exclusion by…

Mooij, D.

5

Efficient modeling of sun/shade canopy radiation dynamics explicitly accounting for scattering  

NASA Astrophysics Data System (ADS)

The separation of global radiation (Rg) into its direct (Rb) and diffuse constituents (Rd) is important when modeling plant photosynthesis because a high Rd:Rg ratio has been shown to enhance Gross Primary Production (GPP). To include this effect in vegetation models, the plant canopy must be separated into sunlit and shaded leaves, for example using an explicit 3-dimensional ray tracing model. However, because such models are often too intractable and computationally expensive for theoretical or large scale studies simpler sun-shade approaches are often preferred. A widely used and computationally efficient sun-shade model is a model originally developed by Goudriaan (1977) (GOU), which however does not explicitly account for radiation scattering. Here we present a new model based on the GOU model, but which in contrast explicitly simulates radiation scattering by sunlit leaves and the absorption of this radiation by the canopy layers above and below (2-stream approach). Compared to the GOU model our model predicts significantly different profiles of scattered radiation that are in better agreement with measured profiles of downwelling diffuse radiation. With respect to these data our model's performance is equal to a more complex and much slower iterative radiation model while maintaining the simplicity and computational efficiency of the GOU model.

Bodin, P.; Franklin, O.

2011-08-01

6

Stomatal and photosynthetic responses during sun\\/shade transitions in subalpine plants: influence on water use efficiency  

Microsoft Academic Search

Different response patterns in net photosynthesis (A) leaf conductance (g) and water use efficiency (WUE= a\\/transpiration) in three subalpine plants occurred during experimental sun\\/shade transitions that simulated natural cloudcover. In Frasera speciosa Dougl., a large-leaved herb characteristic of open sites, g was relatively insensitive to transitions in irradiance and variations in A. However, large decreases in leaf temperature resulted in

A. K. Knapp; W. K. Smith

1987-01-01

7

Optical and thermal performance of glazing with integral venetian blinds  

Microsoft Academic Search

Shading devices have long been used to control solar gain and daylighting through windows. The optimal design and use of such devices requires a detailed knowledge of their optical and thermal properties, including their variation with the angle of incidence of the solar radiation. We describe the experimental methods used to characterise two types of double-glazing units (DGU) incorporating Venetian

J. Breitenbach; S. Lart; I. Längle; J. L. J. Rosenfeld

2001-01-01

8

Light-scattering properties of a Venetian blind slat used for daylighting applications  

Microsoft Academic Search

The low cost, simplicity, and aesthetic appearance of external and internal shading devices, make them commonly used for daylighting and glare-control applications. Shading devices, such as Venetian blinds, screens, and roller shades, generally exhibit light scattering and\\/or light redirecting properties. This requires the bi-directional scattering distribution function (BSDF) of the material to be known in order to accurately predict the

Annica M. Nilsson; Jacob C. Jonsson

2010-01-01

9

Analysis and demonstration of fuel-free cooling and lighting device. Final report  

SciTech Connect

Presented are the production and testing of a sun shade device. The sun shade consists of a toothed metal angle (called the jamb member) and a webbing, woven of precisely formulated filaments, which is laced horizontally from tooth to tooth of the jamb member. Testing was performed in air-conditioned and non-air-conditioned rooms of school buildings in three different climatic areas of Virginia. During a 365 day period, interior temperatures and light were monitored and continuously recorded for each room. (BCS)

Not Available

1982-09-29

10

Light-scattering properties of a Venetian blind slat used for daylighting applications  

SciTech Connect

The low cost, simplicity, and aesthetic appearance of external and internal shading devices, make them commonly used for daylighting and glare-control applications. Shading devices, such as Venetian blinds, screens, and roller shades, generally exhibit light scattering and/or light redirecting properties. This requires the bi-directional scattering distribution function (BSDF) of the material to be known in order to accurately predict the daylight distribution and energy flow through the fenestration system. Acquiring the complete BSDF is not a straightforward task, and to complete the process it is often required that a model is used to complement the measured data. In this project, a Venetian blind slat with a white top surface and a brushed aluminum bottom surface was optically characterized. A goniophotometer and an integrating sphere spectrophotometer were used to determine the angle resolved and hemispherical reflectance of the sample, respectively. The acquired data were fitted to a scattering model providing one Lambertian and one angle dependent description of the surface properties. These were used in combination with raytracing to obtain the complete BSDFs of the Venetian blind system. (author)

Nilsson, Annica M. [Department of Engineering Sciences, Angstroem Laboratory, Uppsala University (Sweden); Jonsson, Jacob C. [Environmental Energy Technology Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States)

2010-12-15

11

Solar Energy Window.  

National Technical Information Service (NTIS)

An energy absorbing venetian blind type device is provided for generating electricity, providing heat, and serving as a sun shade. A plurality of slats covered with an array of photovoltaic cells are enclosed between two panes of glass of a window housing...

R. L. Field

1977-01-01

12

33 CFR 100.908 - Charlevoix Venetian Night Boat Parade; Charlevoix, MI.  

Code of Federal Regulations, 2010 CFR

...Venetian Night Boat Parade; Charlevoix, MI. 100.908 Section 100.908 Navigation...Venetian Night Boat Parade; Charlevoix, MI. (a) Regulated Area. All waters of Round Lake, Charlevoix, MI. (b) Special Local...

2009-07-01

13

'England's Giorgione': Charles H. Shannon and Venetianism in Late Victorian Art  

Microsoft Academic Search

This dissertation studies the paintings and lithographs of Charles Hazelwood Shannon within the context of British Venetianism. Shannon clearly derived many stylistic elements and figurative motifs from Venetian Renaissance art. By doing so, he was at once following a British tradition of Venetianism, and reformulating it for a modern era.\\u000aThe history of British Venetianism has not been a smooth

William Carlisle McKeown

2004-01-01

14

Multifunction solar window and venetian blind  

SciTech Connect

A multifunction solar window and venetian blind is disclosed which is both functional and decorative. The disclosed structure includes a combination of a doubleglazed window or door provided with a plurality of solar thermal energy absorbing slats rotatably installed intermediate the glass panes of said window. The slats have at least one surface constructed for absorbing solar thermal energy, and may be rotated to face either surface toward the exterior of dwelling in which the window may be installed. A plurality of apertures through the frame above and below the glass surfaces may be selectively opened and closed, in desired combinations, to provide open pathways through which air may flow into and out of the space between the glass surfaces. The slats in this space may transfer their heat to this air which may, by selective opening of said apertures, be used to heat or ventilate the interior of the dwelling. Decorative strips are provided on the slats to enhance solar efficiency and to provide a plurality of decorative patterns.

Meta, F.

1983-12-20

15

Poppea's Legacy: The Julio-Claudians on the Venetian Stage  

Microsoft Academic Search

In a context already established by Claudio Monteverdi's L'incoronazione di Poppea and other Venetian treatments of the Julio-Claudians, Giovanni A. Boretti and Aurelio Aureli's opera Claudio Cesare bears the heavy influence of the Roman historian Cornelius Tacitus. Aureli took extraordinary care to incorporate specific details from Book 12 of Tacitus' Annals into his libretto, deftly blending fact with fanciful supposition

Wendy Heller

2006-01-01

16

Venetian-blind” direct energy converter for fusion reactors  

Microsoft Academic Search

A new direct energy conversion technique that uses the angular-dependent transmission of ribbon grids, which resemble Venetian blinds, to recover the energy of particles leaking out of a fusion reactor is discussed. This converter works well, even to energies as low as 10 keV, because of its excellent space-charge handling ability. This low-energy operating range makes direct energy conversion possible

R. W. Moir; W. L. Barr

1973-01-01

17

33 CFR 100.908 - Charlevoix Venetian Night Boat Parade; Charlevoix, MI.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Charlevoix Venetian Night Boat Parade; Charlevoix, MI. 100.908 Section 100.908 ...ON NAVIGABLE WATERS § 100.908 Charlevoix Venetian Night Boat Parade; Charlevoix, MI. (a) Regulated Area. All...

2013-07-01

18

Experimental study of full-size automated venetian blind windows  

SciTech Connect

This study presents an experimental study on full-size automated venetian blind window systems consisting of horizontal pivoted louvers installed and hermetically sealed between two glass panes. The experimental study was carried out using a test cell of 2.43 m high, 1.48 m wide, and 1.92 m deep. Various parameters were measured instantaneously and recorded using a data acquisition system: interior and exterior air temperatures; various surface temperatures; and total and direct solar radiations. A linearized numerical model was used to verify the experimental results.

Rheault, S.; Bilgen, E. (Ecole Polytechnique, Montreal, Quebec (Canada))

1990-01-01

19

Heat transfer analysis in an automated venetian blind window system  

SciTech Connect

The heat transfer through an automated venetian blind window system is theoretically studied. The assumptions for the solution of the problem were: Heat transfer is unidimensional, heat exchanges are at steady-state for the whole system, thermal exchange by convection over the blind is negligible, materials used are diffuse-gray surfaces, and radiative exchanges with the room walls are considered as if all the surfaces are blackbodies at indoor air temperature. The solution of the governing equations (system of nonlinear equations) is carried out by using an iterative numerical method. Summarized results are presented and compared to the case of a regular window in a typical Canadian climate during winter and summer seasons and with different louver angles. It is found that by using an automated blind system, the predicted auxiliary load can be reduced by up to 36 percent and 47 percent for winter and summer, respectively.

Rheault, S.; Bilgen, E.

1989-02-01

20

Human impact on the karst of the Venetian Fore-Alps, Italy  

Microsoft Academic Search

People have been exploiting the limestone massifs of the Venetian Fore-Alps since prehistory. The fluviokarstic style of the relief and the location of springs were important controls of settlement and land use. Six principal types of exploitation are recognized and overlapped in time: (1) hunting and early farming, Paleolithic to Iron Age, with the first soil erosion; (2) general deforestation

U. Sauro

1993-01-01

21

78 FR 40632 - Safety Zone; Venetian Fireworks; Kalamazoo Lake, Saugatuck, MI  

Federal Register 2010, 2011, 2012, 2013

...Safety Zone; Venetian Fireworks; Kalamazoo Lake, Saugatuck, MI AGENCY: Coast Guard...establishing a temporary safety zone on Kalamazoo Lake in Saugatuck, MI. This safety zone is...restrict vessels from a portion of Kalamazoo Lake due to a fireworks display. This...

2013-07-08

22

Measuring water exchange between the Venetian Lagoon and the open sea  

NASA Astrophysics Data System (ADS)

Almost 15 centuries ago, people fleeing civil disorder and barbarian invasions after the collapse of the Roman Empire began building houses on low-lying islands in the middle of a lagoon. These islands later on—in the 10th century—became the city of Venice, the center of the long-lived Venetian Republic. Surrounded by water, the republic flourished for more than 7 centuries thanks to its strategic position. It fell into decline only at the end of the eighteenth century after being occupied by Napoleon. The early Venetians who built their city on the water to defend it from attacks would never have expected that the water would become the city's most dangerous enemy. In fact, this is what has been going on during the last century Venice risks being destroyed by the very waters that once served as its defense.

Ga?i?, M.; Kova?evi?, V.; Mazzoldi, A.; Paduan, J.; Arena, F.; Mancero Mosquera, I.; Gelsi, G.; Arcari, G.

23

Convective heat transfer from a window with a venetian blind: Detailed modeling  

SciTech Connect

The convective heat-transfer rate from a window surface to an adjacent venetian blind has been studied using a finite-element code. For this study, the window surface was modeled as an isothermal vertical flat plate, and the effects of radiation exchange between the window and blind were ignored. This investigation was undertaken to investigate the effects of blade-to-plate spacing d and blade angle {theta} on the flow pattern and convective heat-transfer coefficients. Results are presented for values of d = 15, 20, 25, 30, and 40 mm, and at each of these spacings, the blade angle was varied, i.e., {theta} = 0{degree}, 45{degree}, {minus}45{degree}, 80{degree}. To support model development, the modeling of a common base case, i.e., the laminar natural convection on an isothermal, vertical flat plate, was studied. Comparisons with experimental results were also made for both local heat flux and flux distribution for d = 15 mm. The results of this paper indicate that convective heat transfer from a vertical flat surface is influenced by the presence of a venetian blind. These results represent a first step in the analysis of the effects of venetian blinds on fenestration heat transfer. Future studies will investigate the effects of solar energy absorption in the blind surface and coupled convective/radiative heat transfer.

Ye, P.; Harrison, S.J.; Oosthuizen, P.H.; Naylor, D.

1999-07-01

24

Mechanism of variable structural colour in the neon tetra: quantitative evaluation of the Venetian blind model  

PubMed Central

The structural colour of the neon tetra is distinguishable from those of, e.g., butterfly wings and bird feathers, because it can change in response to the light intensity of the surrounding environment. This fact clearly indicates the variability of the colour-producing microstructures. It has been known that an iridophore of the neon tetra contains a few stacks of periodically arranged light-reflecting platelets, which can cause multilayer optical interference phenomena. As a mechanism of the colour variability, the Venetian blind model has been proposed, in which the light-reflecting platelets are assumed to be tilted during colour change, resulting in a variation in the spacing between the platelets. In order to quantitatively evaluate the validity of this model, we have performed a detailed optical study of a single stack of platelets inside an iridophore. In particular, we have prepared a new optical system that can simultaneously measure both the spectrum and direction of the reflected light, which are expected to be closely related to each other in the Venetian blind model. The experimental results and detailed analysis are found to quantitatively verify the model.

Yoshioka, S.; Matsuhana, B.; Tanaka, S.; Inouye, Y.; Oshima, N.; Kinoshita, S.

2011-01-01

25

Experimental study of thermal performance of automated venetian blind window systems  

SciTech Connect

This article presents an operational and thermal performance study on automated venetian blind window systems. They are systems with pivoted louvers installed horizontally, sealed hermetically between two glass panes and controlled automatically following the thermal needs. The experimental studies were carried out in two identical test cells (2.43 m high, 1.48 m wide, and 1.92 m deep) used as variable temperature calorimeters. One was equipped with an automated window system and the other double glass window without louvers. Various parameters were measured and recorded: louver angle, inside and outside air temperatures, cloud cover. The operational and thermal performances of the automated louver system have been demonstrated and compared with that of the ordinary system.

Bilgen, E. (Univ. of Montreal, Quebec (Canada))

1994-01-01

26

Thermal and daylighting performance of an automated venetian blind and lighting system in a full-scale private office  

Microsoft Academic Search

Dynamic envelope\\/lighting systems have the potential to optimize the perimeter zone energy balance between daylight admission and solar heat gain rejection on a real-time basis, and to increase occupant comfort. Two side-by-side full-scale offices in Oakland, California were built to further develop and test this concept. An automated venetian blind was operated in synchronization with a dimmable electric lighting system

E. S. Lee; D. L. DiBartolomeo; S. E. Selkowitz

1998-01-01

27

Integrated performance of an automated venetian blind\\/electric lighting system in a full-scale office environment  

Microsoft Academic Search

Comprehensive results are presented from a fill-scale testbed of a prototype automated venetian blind lighting system installed in two unoccupied, private offices in Oakland, California. The dynamic system balanced daylight against solar heat gains in real-time, to reduce perimeter zone energy use and to increase comfort. This limited proof-of-concept test was designed to work out practical ''bugs'' and refine design

D. L. DiBartolomeo; Eleanor Lee; S. E. Selkowitz; E. L. Vine

1998-01-01

28

Calorific measurement of the inward-flowing fraction of absorbed solar radiation in venetian blinds  

SciTech Connect

This paper presents the calorimetric measurement of the inward-flowing fraction of absorbed solar radiation for a venetian blind at various blind slat angles. The general methodology used for this study followed that originally used by Klems and Kelley (1996). By conducting controlled experiments with an electrically heated blind (to simulate the effects of absorbed solar radiation), the magnitude of the inward-flowing fraction can be directly determined, and environmental effects can be evaluated (i.e., irradiance, interior/exterior temperature difference, and exterior air-film coefficient). For these tests, a calibration transfer standard was used rather than a commercial sealed-glazing unit. Furthermore, because irradiation of the specimen was unnecessary, the entire test was performed indoors. Results indicate that the inward-flowing fraction is dependent on the interior/exterior temperature difference, and only slightly dependent on the absorbed irradiance and exterior air film coefficient. The blind slat angle was also found to have an effect under certain circumstances. Specifically, an open blind combined with an interior/exterior temperature difference had higher inward-flowing fraction values than all other cases. Finally, a proposed test method for determining the inward-flowing fraction is presented and examined. The application of these data is discussed.

Collins, M.R.; Harrison, S.J.

1999-07-01

29

Geomorphological analysis of sinkhole and landslide hazard in a karst area of the Venetian Prealps- Italy  

NASA Astrophysics Data System (ADS)

In the pedemountain area of the Asiago Plateau (Venetian Prealps - NE Italy) sinkholes and landslides represent in many cases a complex response to karst processes. Field survey showed that both soil and bedrock are involved, mainly represented by colluvial-alluvial sediments and carbonate rocks. Preliminary observations also reveal the key role of piping and cave-collapse phenomena and the importance of human remedial measures. Within study area, these processes cause damage mainly to agricultural and pasture activities and expose peoples and farm animals to very high hazards. This work provides preliminary results of geomorphological analysis carried out to define sinkhole and landslide hazard and his connections with karst processes. During first phases of the research program, an inventory of interesting phenomena has been elaborated employing GIS technologies. The database has been constantly revised and enriched with new field measurements and thematic maps (i.e. geomorphological, geo-structural, hydrogeological, caves development maps). Specifically, field survey focused on the morphodynamic definition of instability elements allowing to recognize a wide range of morphotypes (mainly with regard to sinkholes) and polygenic morphologies (i.e. mixed sinkholes-landslides configurations). Geomorphological analysis also revealed specific evolutionary trends of instability processes; they could be useful employed to program more effective mitigation strategies.

Tiberi, Valentina

2010-05-01

30

Energy cost and efficiency of Venetian rowing on a traditional, flat hull boat (Bissa).  

PubMed

The total net metabolic power output (E, kW) required to scull a traditional, flat hull boat--the "Bissa", 9.02 m long and weighting about 500 kg including the crew-was assessed at different constant speeds (nu) ranging from 2.44 to 3.75 m s(-1). E increased with the speed: E = 0.417 x e (0.664v ); r (2) = 0.931. The amount of metabolic energy spent per unit distance (C, J m(-1)) to move the "Bissa", calculated by dividing E by the corresponding nu, was a linear function of nu: C = 0.369 nu -0.063; r (2) = 0.821. The hydrodynamic resistance met by the boat in the water--drag (D, N)--was estimated by analysing the decay of the reciprocal of nu as a function of time measured during several spontaneous deceleration tests carried out in still water and by knowing the total mass of the watercraft plus crew. D increased as a square function of speed: D = 12.76 v (2). This allowed us to calculate the drag efficiency (g(d)), as the ratio of D to C: g(d) increased from 8.9 to 13.7% in the range of the speeds tested. The "Bissa" turned out to be as economical as other flat hull, traditional watercrafts, such as the bigger Venetian gondola, and her g(d) was similar to that of other modern and traditional watercrafts. PMID:19050909

Capelli, Carlo; Tarperi, C; Schena, F; Cevese, A

2008-12-03

31

Photochemistry in Saturn’s Ring-Shadowed Atmosphere: Venetian Blinds, Atmospheric Molecules and Observations  

NASA Astrophysics Data System (ADS)

Cassini has been orbiting Saturn for over nine years. During this epoch, the ring shadow has moved from covering a relatively large portion of the northern hemisphere to covering a large swath south of the equator and continues to move southward. At Saturn Orbit Insertion in 2004, the ring plane was inclined by ~24 degrees relative to the Sun-Saturn vector. The projection of the B-ring onto Saturn reached as far as 40N along the central meridian 52N at the terminator). At its maximum extent, the ring shadow can reach as far as 48N/S 58N/S at the terminator). The net effect is that the intensity of both ultraviolet and visible sunlight penetrating into any particular latitude will vary depending on both Saturn’s axis relative to the Sun and the optical thickness of each ring system. In essence, the rings act like venetian blinds. Our previous work [1] examined the variation of the solar flux as a function of solar inclination, i.e. ~8 year season at Saturn. Here, we report on the impact of the oscillating ring shadow on the photolysis and production rates of hydrocarbons in Saturn’s stratosphere and upper troposphere, including acetylene, ethane, propane, and benzene. Beginning with methane, we investigate the impact on production and loss rates of the long-lived photochemical products leading to haze formation are examined at several latitudes over a Saturn year. Similarly, we assess its impact on phosphine abundance, a disequilibrium species whose presence in the upper troposphere is a tracer of convection processes in the deep atmosphere. Comparison to the corresponding rates for the clear atmosphere and for the case of Jupiter, where the variation of solar insolation due to tilt is known to be insignificant 3 degree inclination), will be presented. We will present our ongoing analysis of Cassini’s CIRS, UVIS, and VIMS datasets that provide an estimate of the evolving haze content of the northern hemisphere and we will begin to assess the implications for dynamical mixing. [1] Edgington, S.G., et al., 2012. Photochemistry in Saturn’s Ring Shadowed Atmosphere: Modeling, Observations, and Preliminary Analysis. Bull. American. Astron. Soc., 38, 499 (#11.23).

Edgington, Scott G.; Atreya, S. K.; Wilson, E. H.; Baines, K. H.; West, R. A.; Bjoraker, G. L.; Fletcher, L. N.; Momary, T.

2013-10-01

32

CHANGES IN THE USE OF NATURAL RESOURCES AND HUMAN IMPACT IN THE KARST ENVIRONMENT OF THE VENETIAN PREALPS (ITALY) SPREMEMBE V IZKORIŠ?ANJU NARAVNIH VIROV IN VPLIV ?LOVEKA NA KRAŠKO OKOLJE V BENEŠKIH PREDALPAH (ITALIJA)  

Microsoft Academic Search

UDC 504.5:551.44(234.3) Ugo Sauro: Changes in the Use of Natural Resources and Hu- man Impact in the Karst Environments of the Venetian Pre- alps In the Venetian Prealps the old model of resources use was for many aspects of sustainable type, in equilibrium with the natu - ral dynamics. Episodes of strong impact occurred only in some particular areas and

Ugo SAURO

33

Using a MODFLOW grid, generated with GMS, to solve a transport problem with TOUGH2 in complex geological environments: The intertidal deposits of the Venetian Lagoon  

Microsoft Academic Search

The tides of the Venetian Lagoon generally vary between ?0.5 and +0.7masl. Occasionally, they may reach a maximum of 1.5m (acqua alta) and a minimum of ?0.8masl (acqua bassa). Intertidal areas, called “barene,” exist all along the coast of the Lagoon. These areas are characterized by canals that concentrate the flow of water (and the deposition of sands) during the

A. Borgia; L. Cattaneo; D. Marconi; C. Delcroix; E. L. Rossi; G. Clemente; C. G. Amoroso; F. Lo Re; E. Tozzato

2011-01-01

34

Orbitally induced limestone\\/marlstone rhythms in the Albian—Cenomanian Cismon section (Venetian region, northern Italy): Sedimentology, calcareous and siliceous plankton distribution, elemental and isotope geochemistry  

Microsoft Academic Search

A multidisciplinary study of the upper Albian—Cenomanian portion of the Cismon section (Venetian region, northern Italy) was undertaken in order to characterize the cyclic alternations of carbonate-rich and carbonate-poor layers and to investigate their possible origin and cyclic patterns. Limestone semicouplets are characterized by abundant radiolarians and micarbs (micron-sized calcitic fragments), common planktonic foraminifera, strong bioturbation, good oxygenation as expressed

A. Bellanca; M. Claps; E. Erba; D. Masetti; R. Neri; I. Premoli Silva; F. Venezia

1996-01-01

35

Solar passive ceiling system. Final report. [Passive solar heating system with venetian blind reflectors and latent heat storage in ceiling  

SciTech Connect

The construction of a 1200 square foot building, with full basement, built to be used as a branch library in a rural area is described. The primary heating source is a passive solar system consisting of a south facing window system. The system consists of: a set of windows located in the south facing wall only, composed of double glazed units; a set of reflectors mounted in each window which reflects sunlight up to the ceiling (the reflectors are similar to venetian blinds); a storage area in the ceiling which absorbs the heat from the reflected sunlight and stores it in foil salt pouches laid in the ceiling; and an automated curtain which automatically covers and uncovers the south facing window system. The system is totally passive and uses no blowers, pumps or other active types of heat distribution equipment. The building contains a basement which is normally not heated, and the north facing wall is bermed four feet high around the north side.

Schneider, A.R.

1980-01-01

36

The dilemma of gaps in carbonate stratigraphic sequences: A case history from the Jurassic of the Venetian Alps, Italy  

SciTech Connect

The Lower Ammonitico Rosso (L.A.R.) of the western Venetian Alps is a thin, red nodular limestone that overlies a thick Late Triassic to Middle Jurassic (Aalenian) shallow-water platform sequence. It is thought to represent a Middle Jurassic (Bajocian) drowning event whereby the Trento Platform became a submerged plateau. The L.A.R. is problematic in that it (1) is rich in ammonites and other pelagic fauna; (2) contains stromatolites, oncolites, and shallow-water sedimentary structures; and (3) directly overlies platform sediments that contain complex brecciated fabrics filled by cement and Bajocian-age sediment. These seemingly contradictory features have generated much debate as to the sequence stratigraphy of the Trento Platform. New evidence suggests that the L.A.R. was deposited in a shallow-water environment following a period of subaerial exposure. In an east-west transect from the platform edge to platform interior, a clear transition is exhibited from high- and low-energy open-marine facies to restricted lagoonal facies. High-energy open-marine facies include well-sorted skeletal- and peloidal-rich sands possessing low-angle to planar cross stratification and thin, fairly sorted ammonite- and belemnite-rich gravels. Sands include both shallow-water and pelagic fauna; gravels commonly contain ripup clasts from underlying sediments. Low-energy open-marine facies consist of buff colored wackestones and packstones that contain ammonites, belemnites, pelagic bivalves, and peloids. With respect to paleogeography, the abrupt transition from open-marine facies at the platform edge to lagoonal facies in the platform interior indicates that thrombolites, stromatolites, and oncolites accumulated in a shallow restricted environment.

Zempolich, W.G. (Johns Hopkins Univ., Baltimore, MD (United States))

1991-03-01

37

Integrated performance of an automated venetian blind/electric lighting system in a full-scale office environment  

SciTech Connect

Comprehensive results are presented from a fill-scale testbed of a prototype automated venetian blind lighting system installed in two unoccupied, private offices in Oakland, California. The dynamic system balanced daylight against solar heat gains in real-time, to reduce perimeter zone energy use and to increase comfort. This limited proof-of-concept test was designed to work out practical ''bugs'' and refine design details to increase cost effectiveness and acceptability of this innovative technology for real-world applications. We present results from 14 months of tuning the system design and monitoring energy performance and control system operations. For this southeast-facing office, we found that 1-22% lighting energy savings, 13-28% cooling load reductions, and 13-28% peak cooling load reductions can be achieved by the dynamic system under clear sky and overcast conditions year round, compared to a static, partly closed blind with the same optimized daylighting control system. These energy savings increase if compared to conventional daylighting controls with manually-operated blinds. Monitored data indicated that the control system met design objectives under all weather conditions to within 10% for at least 90% of the year. A pilot human factors study indicated that some of our default control settings should be adjusted to increase user satisfaction. With these adjustments, energy savings will decrease. The final prototype design yielded a 10-year simple payback for this site. If mechanical system downsizing opportunities and qualitative improvements to worker's comfort are included, this innovative technology could be more cost effective. Marketing information for commercializing this technology is given.

DiBartolomeo, D.L.; Lee, Eleanor; Selkowitz, S.E.; Vine, E.L.

1998-02-01

38

Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions.  

PubMed

Epidermal UV transmittance (TUV ) and UV-absorbing compounds were measured in sun and shade leaves of Populus tremuloides and Vicia faba exposed to contrasting light environments under field conditions to evaluate UV acclimation potentials and regulatory roles of photosynthetically active radiation (PAR) and UV in UV-shielding. Within a natural canopy of P. tremuloides, TUV ranged from 4 to 98% and showed a strong nonlinear relationship with mid-day horizontal fluxes of PAR [photon flux density (PFD)?=?6-1830?µmol?m(-2) ?s(-1) ]; similar patterns were found for V. faba leaves that developed under a comparable PFD range. A series of field transfer experiments using neutral-density shade cloth and UV blocking/transmitting films indicated that PAR influenced TUV during leaf development to a greater degree than UV, and shade leaves of both species increased their UV-shielding when exposed to full sun; however, this required the presence of UV, with both UV-A and UV-B required for full acclimation. TUV of sun leaves of both species was largely unresponsive to shade either with or without UV. In most, but not all cases, changes in TUV were associated with alterations in the concentration of whole-leaf UV-absorbing compounds. These results suggest that, (1) moderate-to-high levels of PAR alone during leaf development can induce substantial UV-protection in field-grown plants, (2) mature shade leaves have the potential to adjust their UV-shielding which may reduce the detrimental effects of UV that could occur following sudden exposures to high light and (3) under field conditions, PAR and UV play different roles in regulating UV-shielding during and after leaf development. PMID:23330642

Barnes, Paul W; Kersting, Anna R; Flint, Stephan D; Beyschlag, Wolfram; Ryel, Ronald J

2013-02-20

39

Astronomical Telescope for Photons-gamma Rays of Low Energy (Approximately 4 Mev Using the Difference Method Like a Venetian Blind Telescopio Para Astronomia de Fotos-Gama Pouco Energeticos (Approx. 4 Mev) Por Metodo DA Differenca COM Veneziana.  

National Technical Information Service (NTIS)

A description of a gamma ray telescope, which is sensitive to photons in the energy range of 3 - 10 MeV is presented. Collimation was provided by a passive shield which functioned somewhat like a 'venetian blind' to block the signal from one of the detect...

O. D. Deaguiar I. M. Martin

1980-01-01

40

Using a MODFLOW grid, generated with GMS, to solve a transport problem with TOUGH2 in complex geological environments: The intertidal deposits of the Venetian Lagoon  

NASA Astrophysics Data System (ADS)

The tides of the Venetian Lagoon generally vary between -0.5 and +0.7 m asl. Occasionally, they may reach a maximum of 1.5 m (acqua alta) and a minimum of -0.8 m asl (acqua bassa). Intertidal areas, called "barene," exist all along the coast of the Lagoon. These areas are characterized by canals that concentrate the flow of water (and the deposition of sands) during the rising and waning of the tides, and that inundate and drain the vegetated areas found between canals (where organic-rich clays are deposited). Therefore, since the area is subject to subsidence, in time, sand dykes (the original canals) become juxtaposed to clayey dykes (the original vegetated areas). In addition, the sands form a continuous hydrogeologic network within the clays, very similar to that of a vascular system that effectively drains the whole "barena" deposits. In order to be effective, measures for monitoring, confining, or remediating the transport of pollutants through this kind of environment must explicitly take into account the geologic complexity. The same complexity must be included in the numerical models that support remediation efforts. At the moment, there appears to be no off-the-shelf graphical interface that is able to manage such complexity for TOUGH2. To attempt to solve this problem we have used a calibrated USGS-MODFLOW model, of the barena of "Passo a Campalto" in the Venetian Lagoon, developed with the GMS graphical interface. The model is made of 42 layers, which, apart from the first layer, are 0.5 m thick; the first layer has the thickness distribution of a dump found on top of the barena deposit at Passo a Campalto. Each layer consists of 100×60 square cells, for a total of 252,000 cells, only about half of which are active. Using a FORTRAN routine, we translate this grid, with all the hydrogeologic boundary conditions, into a TOUGH2 input file, and we provide the additional necessary information for running a TOUGH2 simulation. The results are promising, in that we were able to produce TOUGH2 grids with very complex geology and to run the models with success. For visualization, the results can be imported back into GMS as 3D scatter point sets, or they can be plotted with any adequate plotting software such as MatLab. Developing conceptual and numerical models with an elaborate graphical interface such as GMS effectively allows setting up complex problems while concentrating on their physics.

Borgia, A.; Cattaneo, L.; Marconi, D.; Delcroix, C.; Rossi, E. L.; Clemente, G.; Amoroso, C. G.; Lo Re, F.; Tozzato, E.

2011-06-01

41

Perception of aspen and sun/shade sugar maple leaf soluble extracts by larvae of Malacosoma disstria.  

PubMed

We investigated the behavioral feeding preference and the chemoreception of leaf polar extracts from trembling aspen, Populus tremuloides, and from sun and shade sugar maple, Acer saccharum, by larvae of the polyphagous forest tent caterpillar, Malacosoma disstria, a defoliator of deciduous forests in the Northern Hemisphere. Three polar extracts were obtained from each tree species: a total extract, a water fraction, and a methanol fraction. M. disstria larvae were allowed ad libitum access to an artificial diet from eclosion to the fifth instar. Two-choice cafeteria tests were performed comparing the mean (+/-SE) surface area eaten of the total extracts, and the following order of preference was obtained: aspen > sun maple > shade maple. Tests with the other fractions showed that M. disstria larvae preferred the total aspen extract to its water fraction, and the latter to its methanol fraction. The response to sun maple was similar to aspen. However, for the shade maple experiment, there was no difference between the total extract and its water fraction. Electrophysiological recordings for aspen showed that the sugar-sensitive cell elicited more spikes to the water fraction, followed by the total extract, and finally the methanol fraction. Spike activity to stimulations of sun and shade maple extracts revealed a similar trend, where methanol fraction > water fraction > total extract. Our findings are discussed in light of previously known information about this insect's performance on these host plants. PMID:11710605

Panzuto, M; Lorenzetti, F; Mauffette, Y; Albert, P J

2001-10-01

42

Interactions between water stress, sun-shade acclimation, heat tolerance and photoinhibition in the sclerophyll Heteromeles arbutifolia  

Microsoft Academic Search

Gas exchange and chlorophyll fluorescence techniques were used to evaluate the acclimation capacity of the schlerophyll shrub Heteromeles arbutifolia M. Roem. to the multiple co-occurring summer stresses of the California chaparral. We examined the influence of water, heat and high light stresses on the carbon gain and sur- vival of sun and shade seedlings via a factorial experiment involving a

F. VALLADARES; R. W. PEARCY

1997-01-01

43

BRAKE DEVICE  

DOEpatents

A brake device is described for utilization in connection with a control rod. The device comprises a pair of parallelogram link mechanisms, a control rod moveable rectilinearly therebetween in opposite directions, and shoes resiliently supported by the mechanism for frictional engagement with the control rod.

O' Donnell, T.J.

1959-03-10

44

Electrochromic devices  

DOEpatents

An electrochromic device is disclosed having a selective ion transport layer which separates an electrochemically active material from an electrolyte containing a redox active material. The devices are particularly useful as large area architectural and automotive glazings due to there reduced back reaction.

Allemand, Pierre M. (Tucson, AZ); Grimes, Randall F. (Ann Arbor, MI); Ingle, Andrew R. (Tucson, AZ); Cronin, John P. (Tucson, AZ); Kennedy, Steve R. (Tuscon, AZ); Agrawal, Anoop (Tucson, AZ); Boulton, Jonathan M. (Tucson, AZ)

2001-01-01

45

PLASMA DEVICE  

DOEpatents

A device is designed for producing and confining highenergy plasma from which neutrons are generated in copious quantities. A rotating sheath of electrons is established in a radial electric field and axial magnetic field produced within the device. The electron sheath serves as a strong ionizing medium to gas introdueed thereto and also functions as an extremely effective heating mechanism to the resulting plasma. In addition, improved confinement of the plasma is obtained by ring magnetic mirror fields produced at the ends of the device. Such ring mirror fields are defined by the magnetic field lines at the ends of the device diverging radially outward from the axis of the device and thereafter converging at spatial annular surfaces disposed concentrically thereabout. (AFC)

Gow, J.D.; Wilcox, J.M.

1961-12-26

46

DEVICE DESCRIPTION  

Center for Biologics Evaluation and Research (CBER)

Text Version... The LIVIAN device features enhanced telemetry communication with wandless ZIP telemetry (see Telemetry Communication on page 2-23). ... More results from www.fda.gov/downloads/advisorycommittees/committeesmeetingmaterials

47

Device modeling  

NASA Astrophysics Data System (ADS)

A summary report is given of the activities of the device modeling workshop which was held as a part of the Space Photovoltaic Research and Technology Conference at the Lewis Research Center, October 7 to 9, 1986. The purpose of this workshop was to access the status of solar cell device modeling to see if it is meeting present and future needs of the photovoltaic community.

Schwartz, Richard

1987-06-01

48

Riser device  

SciTech Connect

The present invention relates to a riser device which extends from an underwater installation up to a structure situated near the water's surface, and which comprises at least three rigid, elongate members each having associated therewith at least one fluid flow line. The elongate members are interconnected by means of universal joints and have sufficient lengths that the total length of the riser device will exceed the distance between the underwater installation and the structure.

Nybo, R.

1981-05-05

49

Medical Device Recalls  

MedlinePLUS

... Vaccines, Blood & Biologics Animal & Veterinary Cosmetics Tobacco Products Medical Devices Home Medical Devices Medical Device Safety Medical Device ... Learn more about medical device recalls here . - Recent Medical Device Recalls Listed by date posted on FDA website. ...

50

Medical Device Safety  

MedlinePLUS

... Vaccines, Blood & Biologics Animal & Veterinary Cosmetics Tobacco Products Medical Devices Home Medical Devices Medical Device Safety - Section Contents ... Medical Product Safety Network Emergency Situations (Medical Devices) - Medical Device Safety Search the Medical Device Safety Section Medical ...

51

Suction device  

US Patent & Trademark Office Database

A suction device, particularly intended for use as a soft-solder suction device in soldering operations. The suction device includes a housing (1) having a cylindrical chamber (2) and a suction pipe (11) connected to one end of the chamber. Arranged for axial movement in the chamber is piston (4). The piston is arranged to move extremely rapidly through the chamber, from a starting position located adjacent the suction pipe, in response to the release of a force acting automatically upon the piston. This piston movement creates a subpressure, which results in an effective suction effect at the tip of the suction pipe (11). In order to enable the suction device to be held absolutely still when movement of the piston (4) is initiated, the piston is arranged to be operated electromagnetically. The electromagnetic force is initiated by means of a switch which is separate from the suction device and which is foot-operated or arranged to be operated by some other part of the body. In order to simplify cleaning of the suction device, and to extend the intervals at which consecutive cleaning operations need be carried out, the suction pipe (11) is provided with a conically tapering suction channel (12).

Popovic; Stojan (S-112 50 Stockholm, SE)

1987-04-28

52

Identification device  

NASA Astrophysics Data System (ADS)

In this Letter, the identification device disclosed in the present invention is comprised of: a carrier and a plurality of pseudo-pixels; wherein each of the plural pseudo-pixels is formed on the carrier and is further comprised of at least a light grating composed of a plurality of light grids. In a preferred aspect, each of the plural light grids is formed on the carrier while spacing from each other by an interval ranged between 50nm and 900nm. As the aforesaid identification device can present specific colors and patterns while it is being viewed by naked eye with respect to a specific viewing angle, the identification device is preferred for security and anti-counterfeit applications since the specific colors and patterns will become invisible when it is viewed while deviating from the specific viewing angle.

Lin, Jian-Shian; Su, Chih-Chieh; Chou, Ta-Hsin; Wu, Mount-Learn; Lai, Chieh-Lung; Hsu, Che-Lung; Lan, Hsiao-Chin; Huang, Hung-I.; Liu, Yung-Chih; Tu, Zong-Ru; Lee, Chien-Chieh; Chang, Jenq-Yang

2007-10-01

53

Listening Devices  

NSDL National Science Digital Library

We've covered most of the basics of how sound is produced and transmitted, but we've left something out, and that's all the electronic devices we use to amplify sound, reproduce it, or get it from one place to another. How exactly does a CD player work? How does a phone work? And how exactly do those two listening devices we carry on either side of our head work? No, not headphones, even though it might seem that some kids do have those permanently attached. The item in question is our ears.

Robertson, William C.

2003-01-01

54

Intrauterine devices  

Microsoft Academic Search

The aim of this chapter is to review the worldwide use of intrauterine devices (IUDs) for contraception and the long-term contraceptive efficacy and safety of copper-bearing IUDs. The TCu380A and Multiload Cu375 have a very low failure rate (0·2–0·5%) over 10 years. The main concerns of the use of IUDs are risk of pelvic inflammatory diseases and increased menstrual blood

Xiao Bilian

2002-01-01

55

Microbiology Devices Panel Medical Devices Advisory ...  

Center for Biologics Evaluation and Research (CBER)

Text Version... Microbiology Devices Panel Medical Devices Advisory Committee Proposal for the reclassification of rapid influenza detection devices Page 2. ... More results from www.fda.gov/downloads/advisorycommittees/committeesmeetingmaterials

56

Diversionary device  

DOEpatents

A diversionary device has a housing having at least one opening and containing a non-explosive propellant and a quantity of fine powder packed within the housing, with the powder being located between the propellant and the opening. When the propellant is activated, it has sufficient energy to propel the powder through the opening to produce a cloud of powder outside the housing. An igniter is also provided for igniting the cloud of powder to create a diversionary flash and bang, but at a low enough pressure to avoid injuring nearby people.

Grubelich, Mark C. (Albuquerque, NM)

2001-01-01

57

OLED devices  

SciTech Connect

An OLED device having an emission layer formed of an ambipolar phosphine oxide host material and a dopant, a hole transport layer in electrical communication with an anode, an electron transport layer in communication with a cathode, wherein the HOMO energy of the hole transport layer is substantially the same as the HOMO energy of the ambipolar host in the emission layer, and the LUMO energy of the electron transport layer is substantially the same as the LUMO energy of the ambipolar host in the emission layer.

Sapochak, Linda Susan [Arlington, VA; Burrows, Paul Edward [Kennewick, WA; Bimalchandra, Asanga [Richland, WA

2011-02-22

58

Gripping device  

DOEpatents

This invention consists of a gripping device having at least two fingers: one movable finger and at least one stationary finger. The fingers are attached to a support by a collar, the movable finger being pivotally attached. The support carries an air cylinder with a shaft to actuate the movable finger. The movable finger has a wide portion with a slot. On the distal end of the air cylinder's shaft is a travelerthat rides int he slot and, as it does, causes the movable finger to pivot toward and away from the two stationary fingers.

Hapstack, M.

1991-04-08

59

Gripping device  

DOEpatents

This invention consists of a gripping device having at least two fingers: one movable finger and at least one stationary finger. The fingers are attached to a support by a collar, the movable finger being pivotally attached. The support carries an air cylinder with a shaft to actuate the movable finger. The movable finger has a wide portion with a slot. On the distal end of the air cylinder`s shaft is a travelerthat rides int he slot and, as it does, causes the movable finger to pivot toward and away from the two stationary fingers.

Hapstack, M.

1991-04-08

60

Cryopump device  

SciTech Connect

A cryopump device is comprised of a refrigerator section which has at least two expansion chamber cooling elements disposed in a space to be evacuated, a shielding wall disposed in the space encircling both expansion chamber cooling elements and formed by a thermally conductive material, the shielding wall being in heat transfer contact with one of the expansion chamber cooling elements, a condensation panel disposed inside the shielding wall and being in heat transfer contact with the other of the expansion chamber cooling elements, the shielding wall having an opening proximate the condensation panel so that the space is cooled by the other expansion chamber cooling element through the condensation panel.

Momose, Y.; Nakamura, K.

1980-12-23

61

Implantable Medical Devices  

MedlinePLUS

Implantable Medical Devices Updated:May 1,2012 In certain cases, your doctor may prescribe an implantable device to assist your ... maintain the pumping ability of your heart. Implantable Medical Devices Left Ventricular Assist Device (Also known as LVAD) ...

62

Implantable CMOS Biomedical Devices  

PubMed Central

The results of recent research on our implantable CMOS biomedical devices are reviewed. Topics include retinal prosthesis devices and deep-brain implantation devices for small animals. Fundamental device structures and characteristics as well as in vivo experiments are presented.

Ohta, Jun; Tokuda, Takashi; Sasagawa, Kiyotaka; Noda, Toshihiko

2009-01-01

63

Electron bombarded semiconductor devices  

Microsoft Academic Search

The first electron bombarded semiconductor (EBS) devices have recently appeared on the market. These devices have already demonstrated that EBS has considerable promise as an important new electron device for power amplification and control. EBS devices are described with particular emphasis on power devices. The basic EBS principle, some of the analysis used in device design, general considerations in designing

A. Silzars; D. J. Bates; A. Ballonoff

1974-01-01

64

Remote Physical Device Fingerprinting  

Microsoft Academic Search

We introduce the area of remote physical device fingerprinting, or fingerprinting a physical device, as opposed to an operating system or class of devices, remotely, and without the finger- printed device's known cooperation. We accomplish this goal by exploiting small, microscopic deviations in device hardware: clock skews. Our techniques do not require any modification to the fingerprinted devices. Our techniques

Tadayoshi Kohno; Andre Broido; Kimberly C. Claffy

2005-01-01

65

Remote physical device fingerprinting  

Microsoft Academic Search

We introduce the area of remote physical device fingerprinting, or fingerprinting a physical device, as opposed to an operating system or class of devices, remotely, and without the fingerprinted device's known cooperation. We accomplish this goal by exploiting small, microscopic deviations in device hardware: clock skews. Our techniques do not require any modification to the fingerprinted devices. Our techniques report

Tadayoshi Kohno; Andre Broido; K. C. Claffy

2005-01-01

66

Multiple Thermocouple Testing Device.  

National Technical Information Service (NTIS)

This invention relates generally to a thermocouple testing device, and, more particularly, to an automated multiple thermocouple testing device that checks for short and open circuits. This device can be used to test thermocouple circuits in gas turbine e...

J. R. Hildebrand

1982-01-01

67

Medical Device Safety  

MedlinePLUS

A medical device is any product used to diagnose, cure, or treat a condition, or to prevent disease. They ... may need one in a hospital. To use medical devices safely Know how your device works. Keep ...

68

CONTROL LIMITER DEVICE  

DOEpatents

A control-limiting device for monltoring a control system is described. The system comprises a conditionsensing device, a condition-varying device exerting a control over the condition, and a control means to actuate the condition-varying device. A control-limiting device integrates the total movement or other change of the condition-varying device over any interval of time during a continuum of overlapping periods of time, and if the tothl movement or change of the condition-varying device exceeds a preset value, the control- limiting device will switch the control of the operated apparatus from automatic to manual control.

DeShong, J.A.

1960-03-01

69

Implantable CMOS Biomedical Devices.  

PubMed

The results of recent research on our implantable CMOS biomedical devices are reviewed. Topics include retinal prosthesis devices and deep-brain implantation devices for small animals. Fundamental device structures and characteristics as well as in vivo experiments are presented. PMID:22291554

Ohta, Jun; Tokuda, Takashi; Sasagawa, Kiyotaka; Noda, Toshihiko

2009-11-17

70

Low frequency electromagnetic devices  

Microsoft Academic Search

The design, simulation and implementation of low frequency electromagnetic devices on planar structures are given. Planar devices and components are designed and built on a ceramic-based material that allowed a surface-mount (SMT) application. Method of moment based electromagnetic field solvers are used to verify the design of the devices. Planar devices and components are then implemented and tested. Simulation results

Abdullah Eroglu

2009-01-01

71

Magnetic Separation Device.  

National Technical Information Service (NTIS)

This invention pertains to magnetic separation devices and more particularly to; magnetic separation devices used to selectively remove magnetic bead-coated cells from tissues such as bone marrow or blood. Depletion of cell populations from boner marrow h...

G. M. Starken J. Cavin R. A. Quinnell C. A. Twigg D. P. Crawford

1985-01-01

72

Microwave Device Investigations.  

National Technical Information Service (NTIS)

Materials, devices and novel schemes for generation, amplification and detection of microwave and millimeter wave energy are studied. Considered are: (1) Schottky-barrier microwave devices; (2) intermodulation products in IMPATT diode amplifiers; and (3) ...

K. K. Choudhury G. I. Haddad S. P. Kwok N. A. Masnari R. J. Trew

1972-01-01

73

Acceleration Recorder Device.  

National Technical Information Service (NTIS)

The patent application describes a device for use in measuring peak acceleration (g) levels experienced by munitions during rough handling, ballistic launching or at terminal impact. The device is a self-contained mechanical concept based on the predictab...

L. D. Post

1982-01-01

74

Munroe Effect Breaching Device.  

National Technical Information Service (NTIS)

There is provided in the present invention an unlined, Munroe Effect device for breaching structures in urban terrain during combat or emergency operations. The device is constructed as an unlined, linear, shaped explosive charge which upon detonation dir...

J. S. Foster J. A. Zehmer

1982-01-01

75

Devices for hearing loss  

MedlinePLUS

... devices can bring the sound from your TV, radio, or music player directly to your inner ear. Some of these devices can connect directly to your hearing aid. Many now work through a wireless link. Television closed-captioning shows ...

76

Quantum Devices and Structures.  

National Technical Information Service (NTIS)

All devices constructed from quantum mechanical resonant tunneling structures are dependent upon their ability to move charge in and out of the quantum well. The ability to effectively modulate this charge is dependent upon the device structure; which in ...

H. L. Grubin T. R. Govindan

1991-01-01

77

Static Electricity Desensitizing Device.  

National Technical Information Service (NTIS)

The device desensitizes electrically fired squibs, detonators, or initiators to stray currents of electricity, particularly those arising from the accumulation of static electrical charges. The device provides an arc gap so that accumulated static electri...

N. P. Williams

1965-01-01

78

Overview of nanoelectronic devices  

Microsoft Academic Search

This paper provides an overview of research developments toward nanometer-scale electronic switching devices for use in building ultra-densely integrated electronic computers. Specifically, two classes of alternatives to the field-effect transistor are considered: (1) quantum-effect and single-electron solid-state devices and (2) molecular electronic devices. A taxonomy of devices in each class is provided, operational principles are described and compared for the

DAVID GOLDHABER-GORDON; MICHAEL S. MONTEMERLO; J. CHRISTOPHER LOVE; GREGORY J. OPITECK; JAMES C. ELLENBOGEN

1997-01-01

79

Pulse detecting device  

DOEpatents

A device for measuring particle flux comprises first and second photodiode detectors for receiving flux from a source and first and second outputs for producing first and second signals representing the flux incident to the detectors. The device is capable of reducing the first output signal by a portion of the second output signal, thereby enhancing the accuracy of the device. Devices in accordance with the invention may measure distinct components of flux from a single source or fluxes from several sources.

Riggan, W.C.

1984-01-01

80

Pulse flux measuring device  

DOEpatents

A device for measuring particle flux comprises first and second photodiode detectors for receiving flux from a source and first and second outputs for producing first and second signals representing the flux incident to the detectors. The device is capable of reducing the first output signal by a portion of the second output signal, thereby enhancing the accuracy of the device. Devices in accordance with the invention may measure distinct components of flux from a single source or fluxes from several sources.

Riggan, William C. (Albuquerque, NM)

1985-01-01

81

Personal Healthcare Devices  

Microsoft Academic Search

This chapter gives an overview on state-of-the-art devices for personal healthcare. Due to the expected large impact on health economy and on the biomedical engineering device industry, a discussion of the ongoing demographic changes that will presumably push the future development of personal healthcare devices is included. Finally, some trends in ongoing research and suggestions for open problems are presented.

Steffen Leonhardt

82

Radiological Dispersion Device (RDD)  

MedlinePLUS

... far more likely than use of a nuclear explosive device. An RDD combines a conventional explosive device — such as a bomb — with radioactive material. ... an Radiological Dispersion Device (RDD) Event While the explosive blast will be immediately obvious, the presence of ...

83

Automatic domotic device interoperation  

Microsoft Academic Search

Current domotic systems manufacturers develop their systems nearly in isolation, responding to different marketing policies and to different technological choices. While there are many available approaches to enable interoperation with domotic systems as a whole, few solutions tackle interoperation between single domotic devices belonging to different technology networks. This paper introduces an automatic device-to-device interoperation solution exploiting ontology- based semantic

Dario Bonino; Emiliano Castellina; Fulvio Corno

2009-01-01

84

Immunotoxicity of Medical Devices  

Microsoft Academic Search

Determination of the ability of a medical device to interact with the immune system currently involves assessment of the immunogenic potential and biocompatibility of the device or an extract of the device. However, implants are often in the body for extended periods of time and\\/or are placed by a surgical procedure that in and of itself will generate an acute

Kathleen Rodgers; Paal Klykken; Joshua Jacobs; Carmelita Frondoza; Vesna Tomazic; Judith Zelikoff

1997-01-01

85

Pipeline station bypass device  

Microsoft Academic Search

During the operation of these pipelines, it is often necessary to insert devices such as pigs, spheres or other devices for cleaning the pipe interior or as a means to separate various types of fluids, such devices being moved through the pipeline by the fluid pressure. It is desirable that the pipeline pig, scraper, etc., not pass through the booster

Webb

1970-01-01

86

Preloaded latching device  

Microsoft Academic Search

A latching device is disclosed which is lever operated sequentially to actuate a set of collet fingers to provide a radial expansion and to actuate a force mechanism to provide a compressive gripping force for attaching first and second devices to one another. The latching device includes a body member having elongated collet fingers which, in a deactuated condition, is

Clarence J. Wesselski; Kornel Nagy

1992-01-01

87

The device management service  

Microsoft Academic Search

This paper presents a novel service, which is aiming at assisting the end-user in the management of his electronic devices. Nowadays the user is confronted with several different communications devices as, for example, a plain-old telephone, a mobile telephone, a cordless telephone, and a PC or a workstation which acts as a multimedia terminal. All these devices are autonomous and

D. Do van Thanh; T. Jonvik; Erik Vanem; Dao van Tran; Jan Arild Audestad

2001-01-01

88

Portable data collection device  

DOEpatents

The present invention provides a portable data collection device that has a variety of sensors that are interchangeable with a variety of input ports in the device. The various sensors include a data identification feature that provides information to the device regarding the type of physical data produced by each sensor and therefore the type of sensor itself. The data identification feature enables the device to locate the input port where the sensor is connected and self adjust when a sensor is removed or replaced. The device is able to collect physical data, whether or not a function of a time.

French, Patrick D. (Aurora, CO)

1996-01-01

89

Portable data collection device  

DOEpatents

The present invention provides a portable data collection device that has a variety of sensors that are interchangeable with a variety of input ports in the device. The various sensors include a data identification feature that provides information to the device regarding the type of physical data produced by each sensor and therefore the type of sensor itself. The data identification feature enables the device to locate the input port where the sensor is connected and self adjust when a sensor is removed or replaced. The device is able to collect physical data, whether or not a function of a time. 7 figs.

French, P.D.

1996-06-11

90

Interband cascade photovoltaic devices  

NASA Astrophysics Data System (ADS)

A photovoltaic (PV) device based on an interband cascade (IC) structure is proposed for efficiently converting solar and thermal energy to electricity. These IC PV devices employ absorption and transport regions with characteristics that are favorable for achieving high open-circuit voltage and thus possibly improving conversion efficiency over conventional PV devices. Preliminary experiments carried out using IC infrared photodetectors (seven stages) and lasers (11 stages) showed open-circuit voltages that exceed the single-band gap voltage from these devices under infrared illumination. The observed open-circuit voltage demonstrates multiple stages operating in series and provides an initial proof of concept for IC PV devices.

Yang, Rui Q.; Tian, Zhaobing; Klem, J. F.; Mishima, Tetsuya D.; Santos, Michael B.; Johnson, Matthew B.

2010-02-01

91

Unitary lens semiconductor device  

DOEpatents

A unitary lens semiconductor device and method. The unitary lens semiconductor device is provided with at least one semiconductor layer having a composition varying in the growth direction for unitarily forming one or more lenses in the semiconductor layer. Unitary lens semiconductor devices may be formed as light-processing devices such as microlenses, and as light-active devices such as light-emitting diodes, photodetectors, resonant-cavity light-emitting diodes, vertical-cavity surface-emitting lasers, and resonant cavity photodetectors.

Lear, Kevin L. (Albuquerque, NM)

1997-01-01

92

Unitary lens semiconductor device  

DOEpatents

A unitary lens semiconductor device and method are disclosed. The unitary lens semiconductor device is provided with at least one semiconductor layer having a composition varying in the growth direction for unitarily forming one or more lenses in the semiconductor layer. Unitary lens semiconductor devices may be formed as light-processing devices such as microlenses, and as light-active devices such as light-emitting diodes, photodetectors, resonant-cavity light-emitting diodes, vertical-cavity surface-emitting lasers, and resonant cavity photodetectors. 9 figs.

Lear, K.L.

1997-05-27

93

Active silicon implant devices  

US Patent & Trademark Office Database

A medical implant for injecting into the vascular system of animals comprises a device less than 500 .mu.m in size carrying signal processing means for providing an output in response to an input signal. The input may be acoustic, electromagnetic, temperature, pH value, or chemical. The output may be acoustic, electromagnetic, or chemical. Large numbers, e.g., 10.sup.8, of the implant devices may be mixed into a saline solution and injected into a blood vessel where they are carried around the vascular system, or the devices may be mixed with a gas and inhaled. The amount of circulation depends on the device size. For the larger device e.g., above 7 .mu.m to around 250 .mu.m, circulation will be short lived. Smaller sized e.g., <3 .mu.m devices will circulate for a considerable time. Anti-bodies may be coated onto the devices to cause them to adhere to target areas such as tumors. In one device a chemical is released when illuminated externally by an acoustic beam. In another device a chemical is released when the pH of surrounding blood changes to a given level. Power to operate the device may be by an integral battery.

Benjamin; John D. (Malvern, GB2); Mears; Adrian L. (Cheltenham, GB2); White; John C. (Lincoln, GB2)

1988-12-27

94

Communication game device  

US Patent & Trademark Office Database

A communication game device which is disclosed can communicate with another game device, memorize the information about a communication partner at the time of the communication, and offer the communication game device which can process information for the succeeding game to be reflected in the contents of a game or the simulation. The communication game device has a processing section, a program storage part which memorizes a control program, an image storage section which memorizes character pictures matched with picture IDs, and controlling elements which can be operated by a game player. When the player's game device receives parameters from another communication game device, the parameters are stored or the data is renewed. If a parameter containing a body ID and the same body ID as arbitrary data is not stored, the arbitrary data in the parameter is memorized. If the parameter has been memorized, it is updated.

Murase; Kazue (Tokyo, JP); Yokoi; Akihiro (Tokyo, JP)

2013-10-01

95

New unorthodox semiconductor devices  

Microsoft Academic Search

A range of new semiconductor devices, including a number of structures which rely entirely upon new phenomena, are discussed. Unipolar two-terminal devices, including impurity-controlled barriers and graded composition barriers, are considered, as are new transistor structures, including the hot-electron camel transistor, the planar-doped barrier transistor, the thermionic emission transistor, and the permeable base transistor. Regenerative switching devices are addressed, including

K. Board

1985-01-01

96

Bioelectronics and Implanted Devices  

Microsoft Academic Search

The future may well involve the emergence of humans who are fundamentally coupled with bioelectronic devices, science fiction's\\u000a “cyborgs.” Revolutions in semiconductor devices, cognitive science, bioelectronics, nanotechnology and applied neural control\\u000a technologies are facilitating breakthroughs in hybrids of humans and machines. The interactions of increased computing power,\\u000a advances in prosthetic devices, artificial implants, and systems that blend electronic and biological

Ellen M. McGee

97

High efficiency photovoltaic device  

DOEpatents

An N-I-P type photovoltaic device includes a multi-layered body of N-doped semiconductor material which has an amorphous, N doped layer in contact with the amorphous body of intrinsic semiconductor material, and a microcrystalline, N doped layer overlying the amorphous, N doped material. A tandem device comprising stacked N-I-P cells may further include a second amorphous, N doped layer interposed between the microcrystalline, N doped layer and a microcrystalline P doped layer. Photovoltaic devices thus configured manifest improved performance, particularly when configured as tandem devices.

Guha, Subhendu (Troy, MI); Yang, Chi C. (Troy, MI); Xu, Xi Xiang (Findlay, OH)

1999-11-02

98

New unorthodox semiconductor devices  

NASA Astrophysics Data System (ADS)

A range of new semiconductor devices, including a number of structures which rely entirely upon new phenomena, are discussed. Unipolar two-terminal devices, including impurity-controlled barriers and graded composition barriers, are considered, as are new transistor structures, including the hot-electron camel transistor, the planar-doped barrier transistor, the thermionic emission transistor, and the permeable base transistor. Regenerative switching devices are addressed, including the metal-tunnel insulator-semiconductor switch, the polysilicon switch, MIS, and MISIM switching structures, and the triangular-barrier switch. Heterostructure devices are covered, including the heterojunction bipolar transistor, the selectively doped heterojunction transistor, heterojunction lasers, and quantum-well structures.

Board, K.

1985-12-01

99

Scansytem Bacterial Detection Device  

Center for Biologics Evaluation and Research (CBER)

... Scansytem Bacterial Detection Device. Applicant: Hemosystem, SA, Richmond, VA. 510(k) number: BK040031. Product: Scansytem ... More results from www.fda.gov/biologicsbloodvaccines/bloodbloodproducts/approvedproducts

100

Section 8700: Medical Devices  

Center for Biologics Evaluation and Research (CBER)

... SOPP 8717: Required Biocompatibility Training and Toxicology Profiles for Evaluation of Medical Devices Effective Date: Jan. ... More results from www.fda.gov/biologicsbloodvaccines/guidancecomplianceregulatoryinformation/proceduressopps

101

Tooth cleaning device  

US Patent & Trademark Office Database

There is disclosed a tooth cleaning device especially designed and adapted for home use by the general public. The device employs an electric motor coupled by a direct gear drive to a shaft to which may be attached a variety of cleaning, polishing and massaging tips. The housing of the device is shaped to fit in the palm of the hand and is provided with an easily accessible switch. The device is so designed that it cannot be used to reach areas of the teeth and gums that must be treated professionally.

1979-12-25

102

Interconnected semiconductor devices  

DOEpatents

Semiconductor layer and conductive layer formed on a flexible substrate, divided into individual devices and interconnected with one another in series by interconnection layers and penetrating terminals.

Grimmer, Derrick P. (White Bear Lake, MN); Paulson, Kenneth R. (North St. Paul, MN); Gilbert, James R. (St. Paul, MN)

1990-10-23

103

Modern device technologies.  

PubMed

Implantable cardiac devices for arrhythmias and related conditions are a rapidly evolving field, with a constant stream of technologies being developed. There are a number of novel devices, other than conventional pacemakers and implantable defibrillators, currently being developed that have the potential to greatly improve patient outcomes. This paper reviews the important recent technologies, the subcutaneous defibrillator, cardiac contraction modulation, the HeartPOD and CardioMEMS heart failure monitors, left atrial appendage closure devices and leadless cardiac pacing. The features of these devices, the results to date, and their possible clinical utility are discussed. PMID:22138425

Crozier, Ian; Smith, Warren

2011-12-03

104

High voltage thin layer devices (RESURF devices)  

Microsoft Academic Search

The application of a somewhat unusual diode structure opens the possibility to make novel kinds of high voltage devices even with very thin epitaxial or implanted layers. In the new structures crucial changes in the electric field distribution take place at or at least near the surface. The acronym RESURF (REduced SURface Field) was chosen.

J. A. Appels; H. M. J. Vaes

1979-01-01

105

Packaging of MEMS devices  

Microsoft Academic Search

This paper examines issues in the packaging of silicon-micromachined devices. Standard microelectonics packaging seeks to physically isolate the integrated circuits from harmful elements in the environment, to provide mechanical strength for the die, to facilitate thermal dissipation, and to sustain electrical communication with outside circuits. However, due to the many novel applications of MEMS devices, new sets of packaging requirements

Albert K. Hu; Evan D. Green

1995-01-01

106

Vaginal mechanical contraceptive devices.  

PubMed Central

The alleged adverse effects of oral contraceptives and intrauterine devices have led to increased consumer and physician demand for vaginal contraceptive devices. The efficacy and the advantages and disadvantages of vaginal sponges, cervical caps and diaphragms are discussed and compared in this article.

Smith, M.; Barwin, B. N.

1983-01-01

107

Plasma jet ignition device  

Microsoft Academic Search

An ignition device of the plasma jet type is disclosed. The device has a cylindrical cavity formed in insulating material with an electrode at one end. The other end of the cylindrical cavity is closed by a metal plate with a small orifice in the center which plate serves as a second electrode. An arc jumping between the first electrode

M. E. McIlwain; Z. Golenko; J. F. Grant; A. D. Wittstein

1985-01-01

108

Medication timing device  

US Patent & Trademark Office Database

A medication regime control device employs a plurality of liquid crystal displays controlled by a preprogrammed electronic circuit to display to a patient the number of doses of selected identified medications to be consumed at the time of display and any special instructions with respect thereto. The device acts as a watch and personal identifier between displays of the need to take medication.

1998-02-17

109

Device for measuring oxygen  

NASA Astrophysics Data System (ADS)

A digital electronic device for measuring traces of oxygen in superfine and inert atmospheres was developed. The digital oxymeter operates on the principle of continuous electrochemical reduction of oxygen on a cathode-polarized selective oxygen electrode. The special structure of the selective electrode ensures a reading of the device independent of nature, temperature and total pressure of the gas mixture.

1984-07-01

110

a Novel Piezoelectric Device  

Microsoft Academic Search

This paper introduces a new based-on ultrasonic wave micro-fluid driving technique that is different from the present principle. The standing wave is generated by ultrasonic vibration in the device, and acoustic field is generated simultaneously. The particles in fluid medium of the device move towards the node of the standing waves caused by the effect of acoustic radiation pressure. A

Song-Mei Yuan; Zhuang-Yun Tang

2010-01-01

111

Called Party Hold Device.  

National Technical Information Service (NTIS)

A Called Party Hold (CPH) device enables a telephone subscriber to hold an incoming call for tracing purposes. This paper describes the affects on AUTOVON of a commercially available CPH device that was in use at Scott AFB. It proposes a solution that wil...

V. P. Arafiles

1976-01-01

112

Recently Approved Devices  

MedlinePLUS

... products listed here include some of the newest medical technology available. For each product, you can find information about what the device is, how it works, when it can be used, and when it ... do not include every new medical device that has been cleared or approved for ...

113

Intraosseous Infusion Device.  

National Technical Information Service (NTIS)

A device for infusion or aspiration that includes a base and at least one needle positioned within the base, where the base includes one or more locators for positioning the infusion device in relation to one or more predetermined anatomical features. A d...

D. Nedder J. F. Stokes M. J. Turieo R. P. Maloney R. W. Etheredge

2005-01-01

114

Optomechanical medical devices (instruments)  

Microsoft Academic Search

Optomechanical Medical Devices (Instruments) use lightwaves (UV, Visible, IR) for one or more of the following functions; to observe, to measure, to record, to test (align) and or to cut\\/repair. The evolution of Optomechanical Medical Devices probably started when the first torch or candle or petrochemical lamp used a polished reflector (possibly with a concave configuration) to examine a part

Roger S. Reiss

2004-01-01

115

Recovering device drivers  

Microsoft Academic Search

This paper presents a new mechanism that enables applications to run correctly when device drivers fail. Because device drivers are the principal failing component in most systems, reducing driver-induced failures greatly improves overall reliability. Ear- lier work has shown that an operating system can survive driver failures (33), but the applications that depend on them cannot. Thus, while operating system

Michael M. Swift; Muthukaruppan Annamalai; Brian N. Bershad; Henry M. Levy

2006-01-01

116

Devices and Educational Change  

ERIC Educational Resources Information Center

|This paper uses Actor Network Theory to examine two cases of device-mediated educational change, one involving a computer-assisted interactive video module that provided a half-hour of instruction for a university course, the other an assistive communication device that proved a supposedly retarded pre-school child to be intelligent. The paper…

Nespor, Jan

2011-01-01

117

Positioning device for vessels  

SciTech Connect

The ''Poltavemal 'Khimmash'' Production Association has manufactured and commissioned a positioning device for tilting vertical enameled vessels to the horizontal position after assembly and testing and for transporting the vessels to the painting and packing locations. Commissioning of the device helped to avoid damage to the enamel coating of the vessels and resulted in an annual saving of 9547 rubles.

Malyshkin, A.I.; Kuznetsova, N.V.

1983-01-01

118

Quick stop device  

Microsoft Academic Search

A quick stop device for abruptly interrupting the cutting of a workpiece by a cutter is disclosed. The quick stop device employs an outer housing connected to an inner workpiece holder by at least one shear pin. The outer housing includes an appropriate shank designed to be received in the spindle of a machine, such as a machine tool. A

Roger L. Hipwell; Andrew J. Hazelton

1996-01-01

119

Device for removing blackheads  

DOEpatents

A device for removing blackheads from pores in the skin having a elongated handle with a spoon shaped portion mounted on one end thereof, the spoon having multiple small holes piercing therethrough. Also covered is method for using the device to remove blackheads.

Berkovich, Tamara (116 N. Wetherly Dr., Suite 115, Los Angeles, CA)

1995-03-07

120

Preloaded Latching Device.  

National Technical Information Service (NTIS)

A latching device is disclosed which is lever operated sequentially to actuate a set of collet fingers to provide a radial expansion and to actuate a force mechanism to provide a compressive gripping force for attaching first and second devices to one ano...

C. J. Wesselski K. Nagy

1991-01-01

121

Smart portable rehabilitation devices  

Microsoft Academic Search

BACKGROUND: The majority of current portable orthotic devices and rehabilitative braces provide stability, apply precise pressure, or help maintain alignment of the joints with out the capability for real time monitoring of the patient's motions and forces and without the ability for real time adjustments of the applied forces and motions. Improved technology has allowed for advancements where these devices

Constantinos Mavroidis; Jason Nikitczuk; Brian Weinberg; Gil Danaher; Katherine Jensen; Philip Pelletier; Jennifer Prugnarola; Ryan Stuart; Roberto Arango; Matt Leahey; Robert Pavone; Andrew Provo; Dan Yasevac

2005-01-01

122

Modern Device Technologies  

Microsoft Academic Search

Implantable cardiac devices for arrhythmias and related conditions are a rapidly evolving field, with a constant stream of technologies being developed. There are a number of novel devices, other than conventional pacemakers and implantable defibrillators, currently being developed that have the potential to greatly improve patient outcomes. This paper reviews the important recent technologies, the subcutaneous defibrillator, cardiac contraction modulation,

Ian Crozier; Warren Smith

123

Optical thin film devices  

NASA Astrophysics Data System (ADS)

Thin film devices are applied to almost all modern scientific instruments, and these devices, especially optical thin film devices, play an essential role in the performances of the instruments, therefore, they are attracting more and more attention. Now there are numerous kinds of thin film devices and their applications are very diversified. The 300-page book, 'Thin Film Device and Applications,' by Prof. K. L. Chopra gives some general ideas, and my paper also outlines the designs, fabrication, and applications of some optical thin film devices made in my laboratory. Optical thin film devices have been greatly developed in the recent decades. Prof. A. Thelan has given a number of papers on the theory and techniques, Prof. H. A. Macleod's book, 'Thin Film Optical Filters,' has concisely concluded the important concepts of optical thin film devices, and Prof. J. A. Dobrowobski has proposed many successful designs for optical thin film devices. Recently, fully-automatic plants make it easier to produce thin film devices with various spectrum requirements, and some companies, such as Balzers, Leybold AG, Satis Vacuum AG, etc., have manufactured such kinds of coating plants for research or mass-production, and the successful example is the production of multilayer antireflection coatings with high stability and reproducibility. Therefore, it could be said that the design of optical thin film devices and coating plants is quite mature. However, we cannot expect that every problem has been solved, the R&D work still continues, the competition still continues, and new design concepts, new techniques, and new film materials are continually developed. Meanwhile, the high-price of fully-automatic coating plants makes unpopular, and automatic design of coating stacks is only the technique for optimizing the manual design according to the physical concepts and experience, in addition, not only the optical system, but also working environment should be taken into account when designing optical thin film devices. Therefore, chemical and mechanical, as well as optical properties of thin films and optical system, should be known. Following is the outline of design method and applications of optical thin film devices according to the classification of our factory, Shanghai Optical Instrument Factory.

Mao, Shuzheng

1991-11-01

124

High-speed semiconductor devices  

Microsoft Academic Search

An introduction to the physical principles and operational characteristics of high-speed semiconductor devices is presented. Consideration is given to materials and technologies for high-speed devices, device building blocks, the submicron MOSFET, homogeneous field-effect transistors, and heterostructure field-effect transistors. Also considered are quantum-effect devices, microwave diodes, and high-speed photonic devices.

S. M. Sze

1990-01-01

125

77 FR 69488 - Medical Devices; Custom Devices; Request for Comments  

Federal Register 2010, 2011, 2012, 2013

...or plan to use the custom device exemption for treatment of a sufficiently rare condition. 3. Product areas other than orthopedic and dental devices where the custom device exemption may be useful. 4. The type of information manufacturers intend to...

2012-11-19

126

Evolution of atherectomy devices.  

PubMed

Percutaneous atherectomy provides an alternative approach to the endovascular treatment of peripheral atherosclerotic occlusive disease beyond angioplasty and stenting, and has the theoretical advantage of lesion debulking and minimizing barotrauma to the vessel wall. Atherectomy has evolved greatly during the last decade, with currently four FDA approved devices for the treatment of peripheral arterial disease. Several reports have focused on the initial technical success rates, and demonstrated the safety and short as well as mid-term efficacy of atherectomy devices. This article will review the evolution of current atherectomy devices and the associated literature. PMID:21792157

Al Khoury, G; Chaer, R

2011-08-01

127

INTERNAL CUTTING DEVICE  

DOEpatents

A device is described for removing material from the interior of a hollow workpiece so as to form a true spherical internal surface in a workpiece, or to cut radial slots of an adjustable constant depth in an already established spherical internal surface. This is accomplished by a spring loaded cutting tool adapted to move axially wherein the entire force urging the tool against the workpiece is derived from the spring. Further features of importance involve the provision of a seal between the workpiece and the cutting device and a suction device for carrying away particles of removed material.

Russell, W.H. Jr.

1959-06-30

128

Rain sampling device  

DOEpatents

The present invention constitutes a rain sampling device adapted for independent operation at locations remote from the user which allows rainfall to be sampled in accordance with any schedule desired by the user. The rain sampling device includes a mechanism for directing wet precipitation into a chamber, a chamber for temporarily holding the precipitation during the process of collection, a valve mechanism for controllably releasing samples of the precipitation from the chamber, a means for distributing the samples released from the holding chamber into vessels adapted for permanently retaining these samples, and an electrical mechanism for regulating the operation of the device. 11 figures.

Nelson, D.A.; Tomich, S.D.; Glover, D.W.; Allen, E.V.; Hales, J.M.; Dana, M.T.

1991-05-14

129

Rain sampling device  

DOEpatents

The present invention constitutes a rain sampling device adapted for independent operation at locations remote from the user which allows rainfall to be sampled in accordance with any schedule desired by the user. The rain sampling device includes a mechanism for directing wet precipitation into a chamber, a chamber for temporarily holding the precipitation during the process of collection, a valve mechanism for controllably releasing samples of said precipitation from said chamber, a means for distributing the samples released from the holding chamber into vessels adapted for permanently retaining these samples, and an electrical mechanism for regulating the operation of the device.

Nelson, Danny A. (Richland, WA); Tomich, Stanley D. (Richland, WA); Glover, Donald W. (Prosser, WA); Allen, Errol V. (Benton City, WA); Hales, Jeremy M. (Kennewick, WA); Dana, Marshall T. (Richland, WA)

1991-01-01

130

Automobile maneuvering device  

SciTech Connect

An automobile maneuvering device is described which consists of: a chassis comprising transport wheels for permitting movement of the device along the ground, a drive wheel operably rotatably connected to the chassis, and means for rotating the drive wheel, clamp means operably connected to the chassis and spaced from and opposed to the drive wheel, the chassis including means to move the clamp means to engage one portion of an automobile tire with the drive wheel engaged at another portion of the automobile tire, and means to actuate the rotating means, so that with rotation of the drive wheel the automobile tire is rotated and the automobile and device moved along the ground.

Ricciardi, R.

1987-08-18

131

Landsat Imagery of the Venetian Lagoon: A Multitemporal Analysis.  

National Technical Information Service (NTIS)

The use of LANDSAT multispectral scanner images from 1975 to 1979 to determine pollution dispersion in the central basin of the lagoon under varying tidal conditions is described. Images taken during the late spring and representing both short and long ra...

L. Alberotanza A. Zandonella

1980-01-01

132

Device control at CEBAF  

SciTech Connect

CEBAF has undergone a major conversion of its accelerator control system from TACL to EPICS, affecting device control for the RF system, magnets, the machine protection system, the vacuum and valves, and the diagnostic systems including beam position monitors, harps, and the camera and solenoid devices (beam viewers, faraday cups, optical transition radiation viewers, synchrotron radiation monitor, etc.). Altogether these devices require approximately 125,000 EPICS database records. The majority of these devices are controlled through CAMAC; some use embedded microprocessors (RF and magnets), and newer interfaces are in VME. The standard EPICS toolkit was extended to include a driver for CAMAC which supports dual processors on one serial highway, custom database records for magnets and BPMs, and custom data acquisition tasks for the BPMs. 2 refs., 1 tab.

Schaffner, S.; Barker, D.; Bookwalter, V. [and others

1996-08-01

133

Device Classification and Reclassification  

Center for Biologics Evaluation and Research (CBER)

Text Version... Intragastric implants for morbid obesity • Extracorporeal photopheresis systems 15 Page 16. What Are “Class III 510(k)” Devices? ... More results from www.fda.gov/downloads/advisorycommittees/committeesmeetingmaterials

134

Frequency Control Devices.  

National Technical Information Service (NTIS)

The objective of the program was to explore advanced concepts in the design and manufacture of frequency control devices. The program was designed to lead to low cost mass production, high performance components, increased levels of communication system c...

K. M. Lakin

1995-01-01

135

Development of electrochromic devices.  

PubMed

Electrochromic devices (ECD) are systems of considerable commercial interest due to their controllable transmission, absorption and/or reflectance. For instance, these devices are mainly applied to glare attenuation in automobile rearview mirrors and also in some smart windows that can regulate the solar gains of buildings. Other possible applications of ECDs include solar cells, small- and large-area flat panel displays, and frozen food monitoring and document authentication also are of great interest. Over the past 20 years almost 1000 patents and 1500 papers in journals and proceedings have been published with the key words "electrochromic windows". Most of these documents report on materials for electrochromic devices and only some of them about complete electrochromic devices. This paper describes the first patents and some of the recent ones on ECDs, whose development is possible due to the advances in nanotechnology. PMID:19958283

Pawlicka, A

2009-01-01

136

ICU Devices and Procedures  

MedlinePLUS

... ATS PQRIWizard Best of the Web COPD Guidelines Critical Care Environmental & Occupational Health Pulmonary Rehabilitation Resources for Clinicians Sleep BACK TO: Home Clinical Critical Care Information for Patients ICU Devices and Procedures | | ...

137

Echometry Device and Method.  

National Technical Information Service (NTIS)

This invention provides devices and methods for accurate and dependable remote measurement of temperature at predetermined points in a fluid medium, such as the atmosphere or oceans, through the use of propagated waves, such as acoustic or electromagnetic...

E. H. Brown

1981-01-01

138

a Novel Piezoelectric Device  

NASA Astrophysics Data System (ADS)

This paper introduces a new based-on ultrasonic wave micro-fluid driving technique that is different from the present principle. The standing wave is generated by ultrasonic vibration in the device, and acoustic field is generated simultaneously. The particles in fluid medium of the device move towards the node of the standing waves caused by the effect of acoustic radiation pressure. A new device structure has been designed based on piezoelectric drive principle. The vibration modes and response has been obtained by FEA. The simulation results also indicate the feasibility of movements. Considering the influence of vibrator dimension, the dimension of the vibrator has been optimized. The experiment has been accomplished in the device with polystyrene spheres and achieves the enrichment of the particles.

Yuan, Song-Mei; Tang, Zhuang-Yun

139

Immunology Devices Panel  

Center for Biologics Evaluation and Research (CBER)

... of marketed and investigational in vitro devices for use in clinical laboratory medicine including oncology, immunology, and allergy and makes ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

140

Geometry and Cloaking Devices  

NASA Astrophysics Data System (ADS)

Recently, the application of geometry and conformal mappings to artificial materials (metamaterials) has attracted the attention in various research communities. These materials, characterized by a unique man-made structure, have unusual optical properties, which materials found in nature do not exhibit. By applying the geometry and conformal mappings theory to metamaterial science, it may be possible to realize so-called ``Harry Potter cloaking device''. Although such a device is still in the science fiction realm, several works have shown that by using such metamaterials it may be possible to control the direction of the electromagnetic field at will. We could then make an object hidden inside of a cloaking device. Here, we will explain how to design invisibility device using differential geometry and conformal mappings.

Ochiai, T.; Nacher, J. C.

2011-09-01

141

Drop Foot Corrective Device.  

National Technical Information Service (NTIS)

A drop foot corrective device to alleviate a plurality of difficulties encountered in walking by a victim suffering from a drop foot condition is presented. The invention consists essentially of an apparatus including a legband positionable to girdle the ...

B. C. Deis

1978-01-01

142

Electrical energy devices  

US Patent & Trademark Office Database

The performance of electrochemical energy devices such as batteries, fuel cells, capacitors and sensors is enhanced by the use of electrically conducting ceramic materials in the form of fibers, powder, chips and substrates.

2002-09-17

143

Mobile Library Filming Device.  

National Technical Information Service (NTIS)

The work reported is the result of the design, fabrication, and testing of a Mobile Library Filming Device, consisting of a camera and self-contained power source. The document contains the study, performance test, conclusions, and manufacturer's design, ...

C. E. Martin

1968-01-01

144

Intrauterine device (image)  

MedlinePLUS

... uses copper as the active contraceptive, others use progesterone in a plastic device. IUDs are very effective ... less than 2% chance per year for the progesterone IUD, less than 1% chance per year for ...

145

Ceramics for Fusion Devices.  

National Technical Information Service (NTIS)

Ceramics are required for a number of applications in fusion devices, among the most critical of which are magnetic coil insulators, windows for RF heating systems, and structural uses. Radiation effects dominate consideration of candidate materials, alth...

F. W. Clinard

1984-01-01

146

Nanoengineered Biophotonic Hybrid Device.  

National Technical Information Service (NTIS)

An improved method for the design and development of high performance hybrid devices having biological and nonbiological components. A figure of merit is developed for the biological component or components. The component is subjected to various environme...

J. T. LaBelle V. B. Pizziconi

2003-01-01

147

Tribal Training -- Sediment Devices  

USGS Multimedia Gallery

USGS Research Hydrologist Art Horowitz and USGS Oklahoma Water Science Center Hydrologic Technician Ernie Smith describe streambed sediment collection devices for a Tribal training class at the Canadian River, Norman, Oklahoma....

2010-10-01

148

Radiological Devices Panel  

Center for Biologics Evaluation and Research (CBER)

... The Radiological Devices Panel reviews and evaluates data concerning the safety and effectiveness of marketed and investigational diagnostic or ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

149

Ferroelectrics for semiconductor devices  

NASA Astrophysics Data System (ADS)

The technology for the implementation of the integration of thin film ferroelectrics with silicon processing for various devices is described, and factors affecting the integration of ferroelectric films with semiconductor processing are discussed. Consideration is also given to film properties, the properties of electrode materials and structures, and the phenomena of ferroelectric fatigue and aging. Particular attention is given to the nonmemory device application of ferroelectrics.

Sayer, M.; Wu, Z.; Vasant Kumar, C. V. R.; Amm, D. T.; Griswold, E. M.

1992-11-01

150

Water-walking devices  

Microsoft Academic Search

We report recent efforts in the design and construction of water-walking machines inspired by insects and spiders. The fundamental\\u000a physical constraints on the size, proportion and dynamics of natural water-walkers are enumerated and used as design criteria\\u000a for analogous mechanical devices. We report devices capable of rowing along the surface, leaping off the surface and climbing\\u000a menisci by deforming the

David L. Hu; Manu Prakash; Brian Chan; John W. M. Bush

2007-01-01

151

Vacuum Erection Devices  

Microsoft Academic Search

Vacuum erection devices (VEDs) are safe, effective treatments for erectile dysfunction with few side effects. Vacuum negative\\u000a pressure more than 100 mmHg causes a combination of arterial and venous blood to fill the corpora cavernosum. The use of an\\u000a elastic band to trap the blood within the penis allows sufficient rigidity for penetration. Devices approved by the Food and\\u000a Drug

Hunter Wessells

152

Exhaust gas purification device  

SciTech Connect

The exhaust gas purification device includes an exhaust manifold , a purification cylinder connected with the exhaust manifold through a first honey-comb shaped catalyst, and a second honeycomb shaped catalyst positioned at the rear portion of the purification cylinder. Each catalyst is supported by steel wool rings including coarse and dense portions of steel wool. The purification device further includes a secondary air supplying arrangement.

Fujiwara, H.; Hibi, T.; Sayo, S.; Sugiura, Y.; Ueda, K.

1980-02-19

153

REACTOR CONTROL DEVICE  

DOEpatents

A shadow control device for controlling a nuclear reactor is described. The device comprises a series of hollow neutron-absorbing elements arranged in groups, each element having a cavity for substantially housing an adjoining element and a longitudinal member for commonly supporting the groups of elements. Longitudinal actuation of the longitudinal member distributes the elements along its entire length in which position maximum worth is achieved.

Kaufman, H.B.; Weiss, A.A.

1959-08-18

154

Contamination control device  

DOEpatents

A contamination control device for use in a gas-insulated transmission bus consisting of a cylindrical center conductor coaxially mounted within a grounded cylindrical enclosure. The contamination control device is electrically connected to the interior surface of the grounded outer shell and positioned along an axial line at the lowest vertical position thereon. The contamination control device comprises an elongated metallic member having a generally curved cross-section in a first plane perpendicular to the axis of the bus and having an arcuate cross-section in a second plane lying along the axis of the bus. Each opposed end of the metallic member and its opposing sides are tapered to form a pair of generally converging and downward sloping surfaces to trap randomly moving conductive particles in the relatively field-free region between the metallic member and the interior surface of the grounded outer shell. The device may have projecting legs to enable the device to be spot welded to the interior of the grounded housing. The control device provides a high capture probability and prevents subsequent release of the charged particles after the capture thereof.

Clark, Robert M. (Ligonier, PA); Cronin, John C. (Greensburg, PA)

1977-01-01

155

Electronic security device  

DOEpatents

The present invention relates to a security device having a control box containing an electronic system and a communications loop over which the system transmits a signal. The device is constructed so that the communications loop can extend from the control box across the boundary of a portal such as a door into a sealed enclosure into which access is restricted whereby the loop must be damaged or moved in order for an entry to be made into the enclosure. The device is adapted for detecting unauthorized entries into such enclosures such as rooms or containers and for recording the time at which such entries occur for later reference. Additionally, the device detects attempts to tamper or interfere with the operation of the device itself and records the time at which such events take place. In the preferred embodiment, the security device includes a microprocessor-based electronic system and a detection module capable of registering changes in the voltage and phase of the signal transmitted over the loop. 11 figs.

Eschbach, E.A.; LeBlanc, E.J.; Griffin, J.W.

1992-03-17

156

Electronic security device  

DOEpatents

The present invention relates to a security device having a control box (12) containing an electronic system (50) and a communications loop (14) over which the system transmits a signal. The device is constructed so that the communications loop can extend from the control box across the boundary of a portal such as a door into a sealed enclosure into which access is restricted whereby the loop must be damaged or moved in order for an entry to be made into the enclosure. The device is adapted for detecting unauthorized entries into such enclosures such as rooms or containers and for recording the time at which such entries occur for later reference. Additionally, the device detects attempts to tamper or interfere with the operation of the device itself and records the time at which such events take place. In the preferred embodiment, the security device includes a microprocessor-based electronic system (50) and a detection module (72) capable of registering changes in the voltage and phase of the signal transmitted over the loop.

Eschbach, Eugene A. (Richland, WA); LeBlanc, Edward J. (Kennewick, WA); Griffin, Jeffrey W. (Kennewick, WA)

1992-01-01

157

Orthopaedic and Rehabilitation Devices Panel  

Center for Biologics Evaluation and Research (CBER)

... 2010 Meeting Materials of the Orthopaedic and Rehabilitation Devices Panel; ... Orthopaedic and Rehabilitation Devices Panel. Description. ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

158

General and Plastic Surgery Devices Panel  

Center for Biologics Evaluation and Research (CBER)

... Medical Devices. Medical Devices Advisory Committee. General and Plastic Surgery Devices Panel. ... General and Plastic Surgery Devices Panel. ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

159

Diamond Electronic Devices  

NASA Astrophysics Data System (ADS)

For high-power and high-voltage applications, silicon is by far the dominant semiconductor material. However, silicon has many limitations, e.g. a relatively low thermal conductivity, electric breakdown occurs at relatively low fields and the bandgap is 1.1 eV which effectively limits operation to temperatures below 175° C. Wide-bandgap materials, such as silicon carbide (SiC), gallium nitride (GaN) and diamond offer the potential to overcome both the temperature and power handling limitations of silicon. Diamond is the most extreme in this class of materials. By the fundamental material properties alone, diamond offers the largest benefits as a semiconductor material for power electronic applications. On the other hand, diamond has a problem with a large carrier activation energy of available dopants which necessitates specialised device concepts to allow room temperature (RT) operation. In addition, the role of common defects on the charge transport properties of diamond is poorly understood. Notwithstanding this, many proof-of-principle two-terminal and three-terminal devices have been made and tested. Two-terminal electronic diamond devices described in the literature include: p-n diodes, p-i-n diodes, various types of radiation detectors, Schottky diodes and photoconductive or electron beam triggered switches. Three terminal devices include e.g. MISFETs and JFETs. However, the development of diamond devices poses great challenges for the future. A particularly interesting way to overcome the doping problem, for which there has been some recent progress, is to make so-called delta doped (or pulse-doped) devices. Such devices utilise very thin (~1 nm) doped layers in order to achieve high RT activation.

Isberg, J.

2010-11-01

160

Diamond Electronic Devices  

SciTech Connect

For high-power and high-voltage applications, silicon is by far the dominant semiconductor material. However, silicon has many limitations, e.g. a relatively low thermal conductivity, electric breakdown occurs at relatively low fields and the bandgap is 1.1 eV which effectively limits operation to temperatures below 175 deg.n C. Wide-bandgap materials, such as silicon carbide (SiC), gallium nitride (GaN) and diamond offer the potential to overcome both the temperature and power handling limitations of silicon. Diamond is the most extreme in this class of materials. By the fundamental material properties alone, diamond offers the largest benefits as a semiconductor material for power electronic applications. On the other hand, diamond has a problem with a large carrier activation energy of available dopants which necessitates specialised device concepts to allow room temperature (RT) operation. In addition, the role of common defects on the charge transport properties of diamond is poorly understood. Notwithstanding this, many proof-of-principle two-terminal and three-terminal devices have been made and tested. Two-terminal electronic diamond devices described in the literature include: p-n diodes, p-i-n diodes, various types of radiation detectors, Schottky diodes and photoconductive or electron beam triggered switches. Three terminal devices include e.g. MISFETs and JFETs. However, the development of diamond devices poses great challenges for the future. A particularly interesting way to overcome the doping problem, for which there has been some recent progress, is to make so-called delta doped (or pulse-doped) devices. Such devices utilise very thin ({approx}1 nm) doped layers in order to achieve high RT activation.

Isberg, J. [Division for Electricity, Uppsala University, Box 534, S-751 21 Uppsala (Sweden)

2010-11-01

161

Electrical apparatus lockout device  

DOEpatents

A simple lockout device for electrical equipment equipped with recessed power blades is described. The device comprises a face-plate (12) having a threaded member (14) attached thereto and apertures suitable for accommodating the power blades of a piece of electrical equipment, an elastomeric nose (16) abutting the face-plate having a hole for passage of the threaded member therethrough and power blade apertures in registration with those of the face-plate, a block (20) having a recess (34) in its forward face for receiving at least a portion of the hose, a hole therein for receiving the threaded member and an integral extension (26) extending from its rear face. A thumb screw (22) suitable for turning with the hands and having internal threads suitable for engaging the threaded member attached to the face-plate is inserted into a passage in the integral extension to engage the threaded member in such a fashion that when the device is inserted over the recessed power blades of a piece of electrical equipment and the thumb screw (22) tightened, the elastomeric nose (16) is compressed between the face-plate (12) and the block (20) forcing it to expand laterally thereby securing the device in the recess and precluding the accidental or intentional energization of the piece of equipment by attachment of a power cord to the recessed power blades. Means are provided in the interval extension and the thumb screw for the attachment of a locking device (46) which will satisfy OSHA standards.

Gonzales, Rick (Chesapeake, VA)

1999-01-01

162

Acceleration cueing simulation device  

US Patent & Trademark Office Database

An acceleration cueing simulation device is disclosed for applying sustai, as well as dynamic, acceleration forces to a trainee pilot as he operates an aircraft simulator. The acceleration cueing device comprises a pair of Helmholtz coils for generating a uniform magnetic field; an aircraft control device for generating a control data signal which is responsive to simulated flight maneuvers performed by the trainee pilot; and a computer system for producing a plurality of digital logic signals which are in response to the control data signal. The plurality of digital logic signals, when converted to analog signals, will energize a plurality of coils which are embedded in a suit and a helmet worn by the trainee pilot. When the trainee pilot is within the magnetic field generated by the Helmholtz coils, the coils embedded within the suit and the helmet provide a plurality of simulated acceleration forces which are exerted upon the trainee pilot.

1981-01-13

163

Adjustable aquatic exercise device  

US Patent & Trademark Office Database

This new and unique adjustable cantilevered aquatic exercise device offers a clean modern appearing device for exercising on the side of a swimming pool or from the end of a diving board. By mounting two extension arms to two horizontal support arms connected and mounted to the pool deck surface by mounting plates, angle-mounting brackets or slid over the end of the diving board, a single exercise bar may be relocated between pluralities of orifices on the extension arms to achieve a wide variety of elevations to exercise at the side of a swimming pool. This device can be pivoted back from the edge of the pool and remains completely out of the water when in use, not requiring the need to be constructed from expensive materials, and may be finished with a wide variety of rust preventative and cushioned coatings.

Checketts; Stanley J. (Providence, UT)

2008-03-18

164

Pendulum detector testing device  

DOEpatents

A detector testing device which provides consistent, cost-effective, repeatable results. The testing device is primarily constructed of PVC plastic and other non-metallic materials. Sensitivity of a walk-through detector system can be checked by: 1) providing a standard test object simulating the mass, size and material content of a weapon or other contraband, 2) suspending the test object in successive positions, such as head, waist and ankle levels, simulating where the contraband might be concealed on a person walking through the detector system; and 3) swinging the suspended object through each of the positions, while operating the detector system and observing its response. The test object is retained in a holder in which the orientation of the test device or target can be readily changed, to properly complete the testing requirements.

Gonsalves, John M. (Modesto, CA)

1997-01-01

165

Registration of Medical Devices  

PubMed Central

Globally the medical device (MD) market has been growing quite rapidly over the past decade. The regulatory framework for pharmaceuticals and devices differ substantially. The regulatory authorities in different regions of the world recognize different classes of medical devices (MDs), based on their design complexity, their use characteristics, and their potential for harm, if misused. With the vast majority of MDs in developing countries being imported, the respective governments need to put in place policies & regulations to address all elements related to MDs, ranging from its development, manufacturing, registration to post-marketing obligations & disposal so that public can have access to high quality, safe & affordable products for appropriate use. This article highlights current regulations pertaining to registration of MDs in India, in light of those existing in Global Harmonization Task Force (GHTF) member countries & Association of Southeast Asian Nations (ASEAN) countries.

George, Bobby

2010-01-01

166

Laser device and method  

SciTech Connect

A simplified, relatively inexpensive laser device, wherein the laser elements are fixed in a body exoskeleton of electrical insulating material having a low coefficient of thermal expansion. The preferred embodiment includes a shotgun type laser filter having parallel bores which receive the laser flashlamp and laser rod in fixed relation in a body chamber. The reflector surrounds the laser filter and retains the filter within the body chamber. In the preferred method of this invention, several controlled lasing pulses are generated with each illumination pulse of the flashlamp, substantially increasing the efficiency of the laser device. The number of pulses is generally controlled by increasing the voltage to the flashlamp. The rapid multiple lasing pulses generate an elongated plasma in a fluid medium, such as the vitreous fluid body of an eye which makes the laser device extemely efficient for treating glaucoma and other medical treatments.

Myers, J. D.

1985-06-25

167

Suspension device for automobile  

SciTech Connect

A suspension device is described for an automobile, comprising: a shock absorber provided with a damping force change-over mechanism; sensor means including means for detecting horizontal and vertical vibration of the vehicle body; and control device which detects a sustaining time period of an output of the sensor means exceeding a determination value. The control device outputs a change-over for changing a damping force of the shock absorber to a large value only when the sustaining time period exceeds a predetermined time period. It also outputs a signal for maintaining the damping force of the shock absorber to be a large value for a predetermined time period even through the output of the sensor disappears.

Maruyama, M.; Tatemoto, M.; Takada, H.; Harara, M.; Wada, S.; Shimomura, S.; Kumagai, N.; Takizawa, S.

1987-03-10

168

Biochip scanner device  

DOEpatents

A biochip scanner device used to detect and acquire fluorescence signal data from biological microchips or biochips and method of use are provided. The biochip scanner device includes a laser for emitting a laser beam. A modulator, such as an optical chopper modulates the laser beam. A scanning head receives the modulated laser beam and a scanning mechanics coupled to the scanning head moves the scanning head relative to the biochip. An optical fiber delivers the modulated laser beam to the scanning head. The scanning head collects the fluorescence light from the biochip, launches it into the same optical fiber, which delivers the fluorescence into a photodetector, such as a photodiode. The biochip scanner device is used in a row scanning method to scan selected rows of the biochip with the laser beam size matching the size of the immobilization site.

Perov, Alexander (Troitsk, RU); Belgovskiy, Alexander I. (Mayfield Heights, OH); Mirzabekov, Andrei D. (Darien, IL)

2001-01-01

169

Nonaqueous Electrical Storage Device  

DOEpatents

An electrochemical capacitor is disclosed that features two, separated, high surface area carbon cloth electrodes sandwiched between two current collectors fabricated of a conductive polymer having a flow temperature greater than 130.degree. C., the perimeter of the electrochemical capacitor being sealed with a high temperature gasket to form a single cell device. The gasket material is a thermoplastic stable at temperatures greater than 100.degree. C., preferably a polyester or a polyurethane, and having a reflow temperature above 130.degree. C. but below the softening temperature of the current collector material. The capacitor packaging has good mechanical integrity over a wide temperature range, contributes little to the device equivalent series resistance (ESR), and is stable at high potentials. In addition, the packaging is designed to be easily manufacturable by assembly line methods. The individual cells can be stacked in parallel or series configuration to reach the desired device voltage and capacitance.

McEwen, Alan B. (Melrose, MA); Evans, David A. (Seekonk, MA); Blakley, Thomas J. (Woburn, MA); Goldman, Jay L. (Mansfield, MA)

1999-10-26

170

Artwork analysis device  

US Patent & Trademark Office Database

A convenient and economical artwork analysis device that visually aids an observer in determining the existence of geometric interrelationships among the artistic elements making up a work of art. The device includes a transparent sheet of synthetic resin material, a plurality of opaque indicia impressed on the sheet presenting a plurality of geometric patterns with small indication circles surrounding and drawing attention to key points of intersection of the indicia. A handle is integral with the sheet for positioning the sheet in order to visually superimpose the indicia on the work of art to aid the observer in determining the existence of and analyzing geometric interrelationships among the artwork elements. In use, the observer holds the device to observe the work of art therethrough and to visually superimpose the indicia thereon.

1991-05-21

171

Spin Hall effect devices.  

PubMed

The spin Hall effect is a relativistic spin-orbit coupling phenomenon that can be used to electrically generate or detect spin currents in non-magnetic systems. Here we review the experimental results that, since the first experimental observation of the spin Hall effect less than 10 years ago, have established the basic physical understanding of the phenomenon, and the role that several of the spin Hall devices have had in the demonstration of spintronic functionalities and physical phenomena. We have attempted to organize the experiments in a chronological order, while simultaneously dividing the Review into sections on semiconductor or metal spin Hall devices, and on optical or electrical spin Hall experiments. The spin Hall device studies are placed in a broader context of the field of spin injection, manipulation, and detection in non-magnetic conductors. PMID:22522638

Jungwirth, Tomas; Wunderlich, Jörg; Olejník, Kamil

2012-04-23

172

Pendulum detector testing device  

DOEpatents

A detector testing device is described which provides consistent, cost-effective, repeatable results. The testing device is primarily constructed of PVC plastic and other non-metallic materials. Sensitivity of a walk-through detector system can be checked by: (1) providing a standard test object simulating the mass, size and material content of a weapon or other contraband, (2) suspending the test object in successive positions, such as head, waist and ankle levels, simulating where the contraband might be concealed on a person walking through the detector system; and (3) swinging the suspended object through each of the positions, while operating the detector system and observing its response. The test object is retained in a holder in which the orientation of the test device or target can be readily changed, to properly complete the testing requirements. 5 figs.

Gonsalves, J.M.

1997-09-30

173

Meniscal repair devices.  

PubMed

Meniscal repair devices not requiring accessory incisions are attractive. Many factors contribute to their clinical effectiveness including their biomechanical characteristics. This study compared several new meniscal repair devices with standard meniscal suture techniques. Using a porcine model, axis-of-insertion loads were applied to various meniscal sutures and repair devices. A single device or stitch was placed in a created meniscal tear and a load applied. Both loads and modes of failure were recorded. The load-to-failure data show stratification into 4 distinct statistical groups. Group A, 113 N for a double vertical stitch; group B, 80 N for a single vertical stitch; group C, 57 N for the BioStinger, 56 N for a horizontal mattress stitch, and 50 N for the T-Fix stitch; and group D, 33 N for the Meniscus Arrow (inserted by hand or gun), 32 N for the Clearfix screw, 31 N for the SDsorb staple, 30 N for the Mitek meniscal repair system, and 27 N for the Biomet staple. The failure mechanism varied. Sutures broke away from the knot. The Meniscus Arrow and BioStinger pulled through the inner rim with the crossbar intact. The Clearfix screw failed by multiple mechanisms, whereas 1 leg of the SDsorb staple always pulled out of the outer rim. The Mitek device usually failed by pullout from the inner rim. The Biomet staple always broke at the crosshead or just below it. Although the surgeon should be aware of the material properties of the repair technique chosen for a meniscal repair, this information is only an indication of device performance and may not correlate with clinical healing results. PMID:10976122

Barber, F A; Herbert, M A

2000-09-01

174

Therapeutic devices for epilepsy.  

PubMed

Therapeutic devices provide new options for treating drug-resistant epilepsy. These devices act by a variety of mechanisms to modulate neuronal activity. Only vagus nerve stimulation (VNS), which continues to develop new technology, is approved for use in the United States. Deep brain stimulation of anterior thalamus for partial epilepsy recently was approved in Europe and several other countries. Responsive neurostimulation, which delivers stimuli to 1 or 2 seizure foci in response to a detected seizure, recently completed a successful multicenter trial. Several other trials of brain stimulation are in planning or underway. Transcutaneous magnetic stimulation (TMS) may provide a noninvasive method to stimulate cortex. Controlled studies of TMS are split on efficacy, which may depend on whether a seizure focus is near a possible region for stimulation. Seizure detection devices in the form of shake detectors via portable accelerometers can provide notification of an ongoing tonic-clonic seizure, or peace of mind in the absence of notification. Prediction of seizures from various aspects of electroencephalography (EEG) is in early stages. Prediction appears to be possible in a subpopulation of people with refractory seizures, and a clinical trial of an implantable prediction device is underway. Cooling of neocortex or hippocampus reversibly can attenuate epileptiform EEG activity and seizures, but engineering problems remain in its implementation. Optogenetics is a new technique that can control excitability of specific populations of neurons with light. Inhibition of epileptiform activity has been demonstrated in hippocampal slices, but use in humans will require more work. In general, devices provide useful palliation for otherwise uncontrollable seizures, but with a different risk profile than with most drugs. Optimizing the place of devices in therapy for epilepsy will require further development and clinical experience. PMID:22367987

Fisher, Robert S

2012-02-01

175

Therapeutic Devices for Epilepsy  

PubMed Central

Therapeutic devices provide new options for treating drug-resistant epilepsy. These devices act by a variety of mechanisms to modulate neuronal activity. Only vagus nerve stimulation, which continues to develop new technology, is approved for use in the United States. Deep brain stimulation (DBS) of anterior thalamus for partial epilepsy recently was approved in Europe and several other countries. Responsive neurostimulation, which delivers stimuli to one or two seizure foci in response to a detected seizure, recently completed a successful multicenter trial. Several other trials of brain stimulation are in planning or underway. Transcutaneous magnetic stimulation (TMS) may provide a noninvasive method to stimulate cortex. Controlled studies of TMS split on efficacy, and may depend on whether a seizure focus is near a possible region for stimulation. Seizure detection devices in the form of “shake” detectors via portable accelerometers can provide notification of an ongoing tonic-clonic seizure, or peace of mind in the absence of notification. Prediction of seizures from various aspects of EEG is in early stages. Prediction appears to be possible in a subpopulation of people with refractory seizures and a clinical trial of an implantable prediction device is underway. Cooling of neocortex or hippocampus reversibly can attenuate epileptiform EEG activity and seizures, but engineering problems remain in its implementation. Optogenetics is a new technique that can control excitability of specific populations of neurons with light. Inhibition of epileptiform activity has been demonstrated in hippocampal slices, but use in humans will require more work. In general, devices provide useful palliation for otherwise uncontrollable seizures, but with a different risk profile than with most drugs. Optimizing the place of devices in therapy for epilepsy will require further development and clinical experience.

Fisher, Robert S.

2011-01-01

176

Precision alignment device  

DOEpatents

Apparatus for providing automatic alignment of beam devices having an associated structure for directing, collimating, focusing, reflecting, or otherwise modifying the main beam. A reference laser is attached to the structure enclosing the main beam producing apparatus and produces a reference beam substantially parallel to the main beam. Detector modules containing optical switching devices and optical detectors are positioned in the path of the reference beam and are effective to produce an electrical output indicative of the alignment of the main beam. This electrical output drives servomotor operated adjustment screws to adjust the position of elements of the structure associated with the main beam to maintain alignment of the main beam. 5 figs.

Jones, N.E.

1988-03-10

177

Phononic crystal devices  

SciTech Connect

Phononic crystals that have the ability to modify and control the thermal black body phonon distribution and the phonon component of heat transport in a solid. In particular, the thermal conductivity and heat capacity can be modified by altering the phonon density of states in a phononic crystal. The present invention is directed to phononic crystal devices and materials such as radio frequency (RF) tags powered from ambient heat, dielectrics with extremely low thermal conductivity, thermoelectric materials with a higher ratio of electrical-to-thermal conductivity, materials with phononically engineered heat capacity, phononic crystal waveguides that enable accelerated cooling, and a variety of low temperature application devices.

El-Kady, Ihab F. (Albuquerque, NM); Olsson, Roy H. (Albuquerque, NM)

2012-01-10

178

REMOTE CONTROLLED SWITCHING DEVICE  

DOEpatents

An electrical switching device which can be remotely controlled and in which one or more switches may be accurately operated at predetermined times or with predetermined intervening time intervals is described. The switching device consists essentially of a deck, a post projecting from the deck at right angles thereto, cam means mounted for rotation around said posts and a switch connected to said deck and actuated by said cam means. Means is provided for rotating the cam means at a constant speed and the switching apparatus is enclosed in a sealed container with external adjusting means and electrical connection elements.

Hobbs, J.C.

1959-02-01

179

Precision alignment device  

DOEpatents

Apparatus for providing automatic alignment of beam devices having an associated structure for directing, collimating, focusing, reflecting, or otherwise modifying the main beam. A reference laser is attached to the structure enclosing the main beam producing apparatus and produces a reference beam substantially parallel to the main beam. Detector modules containing optical switching devices and optical detectors are positioned in the path of the reference beam and are effective to produce an electrical output indicative of the alignment of the main beam. This electrical output drives servomotor operated adjustment screws to adjust the position of elements of the structure associated with the main beam to maintain alignment of the main beam.

Jones, Nelson E. (Huntington Beach, CA)

1990-01-01

180

Suspension device for automobile  

SciTech Connect

A suspension device is described for an automobile, comprising a pressure source, an electromagnetic valve for transmitting and breaking fluid pressure of the pressure source, and an actuator for converting the fluid pressure transmitted through the electromagnetic valve into a kinetic movement. It also comprises a rod turned by the movement of the actuator, a shock absorber having a damping force changed by turning the rod and a suspension spring having a spring constant changed by the turning rod. The pressure source is used in common to a pressure source for a road clearance adjusting device for adjusting a change in road clearance.

Ohtageki, S.; Wada, S.; Hata, Y.; Takizawa, S.; Maruyama, M.

1986-11-25

181

EXPERIMENTAL ANIMAL WATERING DEVICE  

DOEpatents

A device for watering experimental animals confined in a battery of individual plastic enclosures is described. It consists of a rectangular plastic enclosure having a plurality of fluid-tight compartments, each with a drinking hole near the bottom and a filling hole on the top. The enclosure is immersed in water until filled, its drinking holes sealed with a strip of tape, and it is then placed in the battery. The tape sealing prevents the flow of water from the device, but permits animals to drink by licking the drinking holes. (AEC)

Finkel, M.P.

1964-04-01

182

Nanoelectromechanics of shuttle devices  

NASA Astrophysics Data System (ADS)

A single-electron tunneling (SET) device with a nanoscale central island that can move with respect to the bulk sourceand drain electrodes allows for a nanoelectromechanical (NEM) coupling between the electrical current through the device and the mechanical vibrations of the island. Although the electromechanical "shuttle" instability and the associated phenomenon of single-electron shuttling were predicted more than 15 years ago, both theoretical and experimental studies of NEM-SET structures are still carried out. New functionalities based on quantum coherence, Coulomb correlations and coherent electron-spin dynamics are still of particular interest. In this article we present a short review of recent activities in this area.

Shekhter, R. I.; Gorelik, L. Y.; Krive, I. V.; Kiselev, M. N.; Parafilo, A. V.; Jonson, M.

2013-04-01

183

Adaptive Device Design  

NSDL National Science Digital Library

In this activity, learners explore the concept of how engineering has made possible the development of--and ongoing improvements to--adaptive devices that serve to help individuals with a wide range of physical challenges adapt to the world and participate fully in society. Learners investigate the engineering process to solve problems, and work in teams to improve the design of a current or proposed adaptive device. Learners start with eyeglasses, disassembling, examining component design and shape, and reassembling. Then, learners re-engineer the product seeking improvements to the current product.

Ieee

2013-07-08

184

Nanoscale memory devices.  

PubMed

This article reviews the current status and future prospects for the use of nanomaterials and devices in memory technology. First, the status and continuing scaling trends of the flash memory are discussed. Then, a detailed discussion on technologies trying to replace flash in the near-term is provided. This includes phase change random access memory, Fe random access memory and magnetic random access memory. The long-term nanotechnology prospects for memory devices include carbon-nanotube-based memory, molecular electronics and memristors based on resistive materials such as TiO(2). PMID:20852352

Chung, Andy; Deen, Jamal; Lee, Jeong-Soo; Meyyappan, M

2010-09-17

185

Portable emittance measurement device  

SciTech Connect

In Institute for Theoretical and Experimental Physics (ITEP) the portable emittance measurements device is developed. It provides emittance measurements both with ''pepper-pot'' and ''two slits'' methods. Depending on the method of measurements, either slits or pepper-pot mask with scintillator are mounted on the two activators and are installed in two standard Balzer's cross chamber with CF-100 flanges. To match the angle resolution for measured beam, the length of the stainless steel pipe between two crosses changes is adjusted. The description of the device and results of emittance measurements at the ITEP ion source test bench are presented.

Liakin, D.; Seleznev, D.; Orlov, A.; Kuibeda, R.; Kropachev, G.; Kulevoy, T.; Yakushin, P. [Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation)

2010-02-15

186

Dielectrophoretic columnar focusing device  

DOEpatents

A dielectrophoretic columnar focusing device uses interdigitated microelectrodes to provide a spatially non-uniform electric field in a fluid that generates a dipole within particles in the fluid. The electric field causes the particles to either be attracted to or repelled from regions where the electric field gradient is large, depending on whether the particles are more or less polarizable than the fluid. The particles can thereby be forced into well defined stable paths along the interdigitated microelectrodes. The device can be used for flow cytometry, particle control, and other process applications, including cell counting or other types of particle counting, and for separations in material control.

James, Conrad D. (Albuquerque, NM); Galambos, Paul C. (Albuquerque, NM); Derzon, Mark S. (Tijeras, NM)

2010-05-11

187

Hybrid silicon evanescent devices  

Microsoft Academic Search

Si photonics as an integration platform has recently been a focus of optoelectronics research because of the promise of low-cost manufacturing based on the ubiquitous electronics fabrication infrastructure. The key challenge for Si photonic systems is the realization of compact, electrically driven optical gain elements. We review our recent developments in hybrid Si evanescent devices. We have demonstrated electrically pumped

Alexander W. Fang; Ying-hao Kuo; Richard Jones; Oded Cohen; Omri Raday; Matthew N. Sysak; Mario J. Paniccia; John E. Bowers

2007-01-01

188

Solid-State Devices.  

ERIC Educational Resources Information Center

|This self-study course is designed to familiarize Marine Corps enlisted personnel with the principles of solid-state devices and their functions. The course contains four study units. Each study unit begins with a general objective, which is a statement of what the student should learn from the unit. The study units are divided into numbered work…

Sutliff, Ronald D.; And Others

189

Fluid flow control device  

SciTech Connect

This patent describes a fluid flow control device operable in a gas purge mode, liquid flow mode or backflow restriction mode for use with a fluid circulating system including a pump to selectively control the direction of fluid flow through the fluid circulating system. The fluid flow control device comprises: a valve body including a lower fluid chamber and an upper float chamber formed therein and a float movable disposed within the upper float chamber to control the direction of fluid flow through the fluid flow control device. The valve body includes a gas outlet, a fluid outlet, a liquid outlet and a fluid inlet operatively coupled to the outlet of the pump such that fluid entering the upper float chamber when the pump is operating, controls the position of the float therein to cause gas to flow through the gas outlet when in the gas purge mode and liquid to flow through the fluid outlet when in the liquid flow mode and when the pump is not operating, prevent backflow of gas or liquid through the fluid outlet when in the backflow restriction mode and a gas outlet seat and a fluid backflow seat formed adjacent the gas outlet and the fluid outlet respectively to selectively receive the float to prevent flow respectively therethrough when the fluid flow control device is in the liquid flow mode and the backflow restriction mode respectively whereby gas is purged from the pump.

Bailey, D.F.; Morrison, W.F. Jr.

1991-01-01

190

Energy absorption device  

DOEpatents

An energy absorbing device comprising two metal elements slip-fit together. The inner element has an enlarged portion thereupon which is forced, by a force overload to travel along the inside of the outer tube. The energy of the overload is absorbed by the forces of friction and deformation as the two elements are telescoped together.

Hertelendy, N.A.

1987-01-27

191

Air-Heating Device.  

National Technical Information Service (NTIS)

The purpose of the patent is for an effective use of electrical energy for the heating of air. The housing of the device is made with an induction coil located on the external surface and by a heat-exchange element placed inside its cavity and made of a f...

N. T. Levin

1973-01-01

192

Electrical safety device.  

National Technical Information Service (NTIS)

This invention consists of an electrical safety device for use in power tools that is designed to automatically discontinue operation of the power tool upon physical contact of the tool with a concealed conductive material. A step down transformer is used...

D. B. White

1990-01-01

193

ANNULAR IMPACTOR SAMPLING DEVICE  

DOEpatents

A high-rate air sampler capable of sampling alphaemitting particles as small as 0.5 microns is described. The device is a cylindrical shaped cup that fits in front of a suction tube and which has sticky grease coating along its base. Suction forces contaminated air against the periodically monitored particle absorbing grease.

Tait, G.W.C.

1959-03-31

194

Active terahertz metamaterial devices.  

PubMed

The development of artificially structured electromagnetic materials, termed metamaterials, has led to the realization of phenomena that cannot be obtained with natural materials. This is especially important for the technologically relevant terahertz (1 THz = 10(12) Hz) frequency regime; many materials inherently do not respond to THz radiation, and the tools that are necessary to construct devices operating within this range-sources, lenses, switches, modulators and detectors-largely do not exist. Considerable efforts are underway to fill this 'THz gap' in view of the useful potential applications of THz radiation. Moderate progress has been made in THz generation and detection; THz quantum cascade lasers are a recent example. However, techniques to control and manipulate THz waves are lagging behind. Here we demonstrate an active metamaterial device capable of efficient real-time control and manipulation of THz radiation. The device consists of an array of gold electric resonator elements (the metamaterial) fabricated on a semiconductor substrate. The metamaterial array and substrate together effectively form a Schottky diode, which enables modulation of THz transmission by 50 per cent, an order of magnitude improvement over existing devices. PMID:17136089

Chen, Hou-Tong; Padilla, Willie J; Zide, Joshua M O; Gossard, Arthur C; Taylor, Antoinette J; Averitt, Richard D

2006-11-30

195

Nanoscale Optoelectronic Photosynthetic Devices  

NASA Astrophysics Data System (ADS)

This presentation provides an overview and recent progress in the Oak Ridge National Laboratory research program in molecular electronics and green plant photosynthesis. The photosynthetic reaction center is a nanoscale molecular diode and photovoltaic device. The key thrust of our research program is the construction of molecular electronic devices from these nanoscale structures. Progress in this multidisciplinary research program has been demonstrated by direct electrical contact of emergent electrons with the Photosystem I (PS I) reaction center by nanoparticle precipitation. Demonstration of stable diode properties of isolated reaction centers combined with the ability to orient PS I by self-assembly on a planar surface, makes this structure a good building block for 2-D and potentially 3-D devices. Metallization of isolated PS I does not alter their fundamental photophysical properties and they can be bonded to metal surfaces. We report here the first measurement of photovoltage from single PS I reaction centers. Working at the Cornell University National Nanofabrication Facility, we have constructed sets of dissimilar metal electrodes separated by distances as small as 6 nm. We plan to use these structures to make electrical contact to both ends of oriented PSI reaction centers and thereby realize biomolecular logic circuits. Potential applications of PSI reaction centers for optoelectronic applications as well as molecular logic device construction will be discussed.

Greenbaum, Elias; Lee, Ida; Guillorn, Michael; Lee, James W.; Simpson, Michael L.

2001-03-01

196

Multiple gap photovoltaic device  

DOEpatents

A multiple gap photovoltaic device having a transparent electrical contact adjacent a first cell which in turn is adjacent a second cell on an opaque electrical contact, includes utilizing an amorphous semiconductor as the first cell and a crystalline semiconductor as the second cell.

Dalal, Vikram L. (Newark, DE)

1981-01-01

197

Current limiting device  

US Patent & Trademark Office Database

An electrical current limiting device comprises an electrical superconductor for attachment in an electrical circuit. The superconductor achieves a superconducting condition at relatively high temperatures. A cooling system includes a motor for flowing a cooled gas past the superconductor so that heat can be removed from the superconductor by a heat transfer process with the cooled gas.

2001-05-29

198

Integrated microfluidic devices  

Microsoft Academic Search

“With the fundamentals of microscale flow and species transport well developed, the recent trend in microfluidics has been to work towards the development of integrated devices which incorporate multiple fluidic, electronic and mechanical components or chemical processes onto a single chip sized substrate. Along with this has been a major push towards portability and therefore a decreased reliance on external

David Erickson; Dongqing Li

2004-01-01

199

Discourse Devices in Telugu  

ERIC Educational Resources Information Center

|The aim of this paper is to discuss some of the productive discourse devices and markers noted in 50 spoken narratives elicited from Telugu native speakers. Since most of them are college students and residents of Hyderabad, they are also exposed to English as well as Hindi-Urdu (Dakkhini). After presenting certain salient features of Telugu…

Rani, A. Usha

2010-01-01

200

History of SAW devices  

Microsoft Academic Search

This paper gives a historical account of the development of Rayleigh-wave, or surface acoustic wave (SAW), devices for applications in electronics. The subject was spurred on initially by the requirements of pulse compression radar, and became a practical reality with the planar interdigital transducer, dating from 1965. The accessibility of the propagation path gave rise to substantial versatility, and a

D. P. Morgan

1998-01-01

201

Microwave medical devices  

Microsoft Academic Search

This article describes several new microwave medical devices that either were or are being developed at MMTC, Inc. in cooperation with the following institutions: Celsion Corporation, Columbia, Maryland (microwave balloon catheters); Montefiore Medical Center (MMC), Bronx, New York (microwave balloon catheters, dual microwave antennas, and microwave poration); and the University of California at San Francisco (conformal array antennas). The individuals

F. Sterzer

2002-01-01

202

Condensate removal device  

SciTech Connect

A condensate removal device is disclosed which incorporates a strainer in unit with an orifice. The strainer is cylindrical with its longitudinal axis transverse to that of the vapor conduit in which it is mounted. The orifice is positioned inside the strainer proximate the end which is remoter from the vapor conduit.

Maddox, J.W.; Berger, D.D.

1984-10-23

203

Asphaltene based photovoltaic devices  

US Patent & Trademark Office Database

Photovoltaic devices and methods of making the same, are disclosed herein. The cell comprises: a first electrically conductive layer; at least one photoelectrochemical layer comprising metal-oxide particles, an electrolyte solution, an asphaltene dye, and a second electrically conductive layer.

Chianelli; Russell R. (El Paso, TX); Castillo; Karina (Edinburg, TX); Gupta; Vipin (Las Cruces, NM); Qudah; Ali M. (El Paso, TX); Torres; Brenda (El Paso, TX); Abujnah; Rajab Emhemed (El Paso, TX)

2013-03-05

204

Amphibious Robot Devices.  

National Technical Information Service (NTIS)

Devices for navigating in a fluid medium having a solid boundary include a vehicle body and a fin attached to the vehicle body. The fin is configured to oscillate relative to the body such that interaction between the fin and the fluid medium produces pro...

B. W. Hobson M. Kemp R. Moody C. A. Pell F. Vosburgh

2005-01-01

205

Engine stopping device  

Microsoft Academic Search

An engine stopping device for rendering an internal combustion engine of a spark ignition type by grounding an ignition circuit includes a contact section for achieving grounding which is exposed to air flow passing through an engine cooling air passage, to clean off dry grass or other foreign materials from the contact section.

T. Fujikawa; H. Miyake; S. Tamba

1985-01-01

206

Stellarator and Heliotron Devices  

Microsoft Academic Search

Stellarators and tokamaks are the most advanced devices that have been developed for magnetic fusion applications. The two approaches have much in common; tokamaks have received the most attention because their axisymmetry justifies the use of simpler models and provides a more forgiving geometry. However, recent advances in treating more complicated three dimensional systems have made it possible to design

John L. Johnson

1999-01-01

207

Review of EBIS devices  

SciTech Connect

In this paper we introduce the EBIS device although it has been described many times before. I went into this business in 1980 and I discovered, making some historical research for writing this paper, that EBIS appeared in the sixties. The first words were said in russian in DONETZ laboratories.

Faure, J. (Laboratoire National SATURNE, 91191 Gif/Yvette, France (FR))

1989-06-01

208

Emergency extraction device design  

Microsoft Academic Search

The objective of this research was to develop a device to transport an injured visitor down the spiral staircase to the pedestal where more conventional rescues apprautus can be used. Working with the National Parks Service (NPS), we looked to improve upon the current rescue system the Emergency Medical Service (EMS) Rangers use. The end result will be a lightweight

Nicholas Reisweber

2010-01-01

209

Door edge protection device  

US Patent & Trademark Office Database

A door edge protection device for a motor vehicle door which comprises a door edge protection member guided movably with respect to the door at at least two points lying one behind the other in a longitudinal direction of the door. The door edge protection member is driven via an eccentric lever mounted rotatably in the door.

Lichter; Martin (Erftstadt, DE); Benderoth; Thomas (Gummersbach, DE); Lopes dos Santos; Armando (Cologne, DE)

2012-11-06

210

Integrated Anthropometric Device.  

National Technical Information Service (NTIS)

The measuring device is designed to obtain the sitting height, the shoulder breadth, the sitting shoulder height, the buttock-knee length, the buttock-leg length and the standing height of air crew personnel. These measurements are required for designing ...

J. R. Provost E. C. Gifford J. Lazo

1965-01-01

211

Pneumatic Clamping Device.  

National Technical Information Service (NTIS)

A pneumatic clamping device used to clamp a plurality of sheets together includes a cylinder with a guide element at one and defining a pneumatic chamber within the cylinder and a piston having an elongated shaft, a cylindrical head on one end of the shaf...

B. A. Kosmal

1983-01-01

212

Simulating nanoscale semiconductor devices.  

SciTech Connect

The next generation of electronic devices will be developed at the nanoscale and molecular level, where quantum mechanical effects are observed. These effects must be accounted for in the design process for such small devices. One prototypical nanoscale semiconductor device under investigation is a resonant tunneling diode (RTD). Scientists are hopeful the quantum tunneling effects present in an RTD can be exploited to induce and sustain THz frequency current oscillations. To simulate the electron transport within the RTD, the Wigner-Poisson equations are used. These equations describe the time evolution of the electrons distribution within the device. In this paper, this model and a parameter study using this model will be presented. The parameter study involves calculating the steady-state current output from the RTD as a function of an applied voltage drop across the RTD and also calculating the stability of that solution. To implement the parameter study, the computational model was connected to LOCA (Library of Continuation Algorithms), a part of Sandia National Laboratories parallel solver project, Trilinos. Numerical results will be presented.

Salinger, Andrew Gerhard; Zhao, P. (North Carolina State University, Raleigh, NC); Woolard, D. L. (U. S. Army Research Laboratory, NC); Kelley, C. Tim (North Carolina State University, Raleigh, NC); Lasater, Matthew S. (North Carolina State University, Raleigh, NC)

2005-03-01

213

Cursor Control Device Characteristics  

Microsoft Academic Search

An analysis of cursor positioning may provide guidelines for improvements in cursor control. Four experiments addressed efficiency of cursor control devices (Mouse, Digitising Pen, Accupoint, Trackball). Participants moved a cursor leftwards, upwards or rightwards, positioning it in large or small targets situated in near or far space on the computer screen. Cursor coordinates were sampled every 5 ms. The number

James G. Phillips; Thomas J. Triggs

2000-01-01

214

Telephone marketing device  

US Patent & Trademark Office Database

A telephone marketing device has a center and two outboard panels. The outboard panels have shingled pockets containing cards. The card titles are exposed at the edge of the shingled pockets. The subject matter relating to the titles on each card is concealed by the overlying pocket.

Prentice; John W. (Batesville, IN)

1990-10-23

215

Temperature differential detection device  

Microsoft Academic Search

A temperature differential detection device for detecting the temperature differential between predetermined portions of a container wall is disclosed as comprising a Wheatstone bridge circuit for detecting resistance imbalance with a first circuit branch having a first elongated wire element mounted in thermal contact with a predetermined portion of the container wall, a second circuit branch having a second elongated

Girling

1986-01-01

216

Inflatable device and method for using the device  

US Patent & Trademark Office Database

An inflatable device can be used for physical therapy, conditioning or training. The device has a support platform and a flexible member. The flexible member is attached or affixed to, and has a bowl-shaped distention projecting from one side of, the platform. This flexible member is inflatable to a pressure for supporting a person. The device is inflated in order to support at least some of the weight of a person by compressing the inflatable device at or adjacent to its center. When the person wishes to later change the characteristics of the device, the pressure in the inflatable device can be changed to change its stability.

2003-06-10

217

77 FR 69393 - Unique Device Identification System  

Federal Register 2010, 2011, 2012, 2013

...the and life-sustaining devices. label and device package and submit data...the and life-sustaining devices, and label and device package and implantable...The label and package of implantable...and life- sustaining devices...

2012-11-19

218

Noise in Semiconductor Devices  

NASA Astrophysics Data System (ADS)

The devices under study are Si JFETs, Si MOSFETs, GaAs MESFETs, and AlGaAs/GaAs MODFETs. For Si JFETs, by way of two gates--one normal control gate and one substrate gate we can minimize the generation-recombination noise by proper biasing these two gates to study the 1/f noise source. Chapter four gives the noise studies about MOSFETs both p channel and n channel. We derived the equations for the number fluctuation model and the mobility fluctuation model. The measurements of MOSFETs show presence of the number fluctuation noise. We also discuss 1/f noise and thermal noise in weak inversion, limiting 1/f noise, and flicker noise related with gate-voltage-dependent mobility. In GaAs MESFETs we observe the 1/f noise through diffusion noise to thermal noise. For the low-frequency diffusion noise, the Poole-Frenkel effect gives a shift of the corner frequency and from the noise spectra versus temperature, we can deduce the activation energy. At negative gate bias and floating drain the drain shows thermal noise, but when the gate is biased positively so that it draws gate current it will contribute excess noise to the floating drain. The current noise spectra at both the gate and the floating drain show an I('2mV1/V) relationship, which is common for the Schottky barrier diodes. Low frequency noise measurements in MODFETs, at a given frequency the equivalent saturated current varies as the square of the applied voltage, as expected for a fluctuating resistor, and saturates when the characteristic saturates. Measurements on ungated devices shine light on the degration factors in MODFETs and locate the noise sources in MODFETs. Chapter seven is a very practical approach to study the noise performance of those devices applied in high frequency applications. It starts from the background of the theory. Then when the device D.C. characterizations, scattering parameters, microwave noise figure, thermal noise measurement, and low frequency noise measurements, one can have a complete characterization of the device and give a real guidance for low noise device development.

Duh, Kuang-Hann George

219

High temperature spintronic devices  

NASA Astrophysics Data System (ADS)

Spintronics is a rapidly developing multidisciplinary field which investigates avenues of exploiting the spin degree of freedom in charge carriers and the nucleus of atoms to design novel devices that would outperform existing ones based on complementary-metal-oxide-semiconductor (CMOS) technology. Spin-polarized semiconductor based coherent light sources promise an ability to predict, stabilize and control orthogonal polarization states with reduced input power requirements. This doctoral thesis investigates different aspects of design, epitaxial growth, fabrication, characterization and modeling of spin based electronic and optoelectronic devices working near room temperature. We have demonstrated the modulation of magnetoresistance in an InAs/ In0.53Ga0.47As/ In0.52Al0.48As lateral spin valve with a gate electrode placed alongside the MnAs polarizer contact and outside the current transport channel. The results indicate that the change in magnetoresistance is caused, in part, by Rashba spin-orbit coupling due to the gate bias. In order to achieve higher working temperatures devices for real world applications MnAs/GaAs/MnAs based vertical spin valves have been realized. We have attributed the near room temperature operation of these devices to valence band electron tunneling of spin polarized carriers in and out of a heavily p-doped GaAs:Mn layer. Peak magnetoresistance of 40 % and 1 % have been observed at 10 K and 300 K respectively. The continuous wave, transient and high frequency dynamics of spin-polarized carriers and photons in a spin laser have been studied. Besides lowering of threshold currents, it has been theoretically estimated that these devices can show larger small-signal modulation bandwidth and 100% output polarization, independent of the injected carrier spin polarization, under appropriate biasing conditions. Measurements were done at 230 K on a InAs/GaAs quantum dot spin vertical cavity surface emitting laser (VCSEL). A time-averaged output polarization of 55% is measured with an active region spin polarization of 5-6%. A peak threshold current reduction of 4.5 % and a polarization modulation index of 0.6 have been measured in these devices under continuous wave bias. The measured output characteristics, both DC and transient, match very well with those calculated from theory.

Basu, Debashish

220

Investigational Device Exemptions: Regulatory Requirements for Medical Devices.  

National Technical Information Service (NTIS)

The publication is Chapter 7 of the 'Regulatory Requirements for Medical Devices - A Workshop Manual.' It covers regulatory requirements for investigational device exemptions, which are granted for purposes of conducting clinical studies. Exemption from c...

1989-01-01

221

Power Semiconductor Switching Devices and Power Semiconductor Devices.  

National Technical Information Service (NTIS)

Power semiconductor switching devices, power converters, integrated circuit assemblies, integrated circuitry, power current switching methods, methods of forming a power semiconductor switching device, power conversion methods, power semiconductor switchi...

B. A. Smetana R. C. Eden

2005-01-01

222

Device Profiling Analysis in Device-Aware Network.  

National Technical Information Service (NTIS)

A key challenge to communications on the network-centric battlefield is that the end-devices must utilize limited resources to support the mission operations. This requires the devices to conserve resources by avoiding the reception, transmission, and pro...

S. Tsai

2004-01-01

223

Wire brush fastening device  

DOEpatents

A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus.

Meigs, R.A.

1993-08-31

224

Novel heterojunction devices  

SciTech Connect

Recent progress in the fabrication and realization of novel heterojunction devices based on band structure engineering is described. The fact that strained layer epitaxy can be used to create entirely new structures illustrated through such diverse examples as ordered growth of Ge/Si on Si, strained p-type quantum well FETs with light-hole dominated transconductance on GaAs, and high speed strained InGaAs/GaAs MODFETs. Recent calculations involving molecular dynamic simulations of strained layer growth, with mismatches of up to 4%, is described and the outstanding puzzle of crystal thicknesses much larger than allowed by equilibrium theories for coherent crystal growth is resolved. Some recent examples of the perfection of quantum well structures is illustrated through the fabrication of devices based on perpendicular transport such as the resonant tunneling bipolar transistor and 10 ..mu..m superlattice ir detectors. 8 refs.

Narayanamurti, V.

1987-01-01

225

Droplet velocity dispersion device  

NASA Astrophysics Data System (ADS)

A droplet velocity dispersion device (DVDD), which can measure the uniformity of a droplet stream injected into a high vacuum, was developed. Droplet streams are passed through light; a magnified shadow image is reflected to the detector; and the stream image is superimposed on a slit which is perpendicular to the stream. The DVDD converts each image to signals which represent the shape, size, and longitudinal spacing of the droplet stream. The instrument can measure velocity dispersion to an accuracy of one part in 10 to the 6th. In order to obtain an accurate representation of the droplet stream, the time response of the DVDD must be small; in addition, the slit width of the detector has to be the correct size to admit the proper light level. These parameters were determined and the device tested. The test results compare well with theory. The information obtained from the DVDD can be used to develop a liquid droplet radiator for space application.

Dixon, M.

226

Principles of Semiconductor Devices  

NSDL National Science Digital Library

Home page of an online and interactive textbook, Principles of Semiconductor Devices., written by Bart J. Van Zeghbroeck, Ph.D., Professor in the Department of Electrical and Computer Engineering at the University of Colorado at Boulder. The goal of this text is to provide the basic principles of common semiconductor devices, with a special focus on Metal-Oxide-Semiconductor Field-Effect-Transistors (MOSFETs). A browser environment was chosen so that text, figures and equations can be linked for easy reference. A table of contents, a glossary, active figures and some study aids are integrated with the text with the intention to provide a more effective reference and learning environment. Chapter titles include: Semiconductor Fundamentals, Metal-Semiconductor Junctions, p-n Junctions, Bipolar Transistors, MOS Capacitors, and MOSFET.

Van Zeghbroeck, Bart J.

2011-06-13

227

Microelectromechanical safe arm device  

DOEpatents

Microelectromechanical (MEM) apparatus and methods for operating, for preventing unintentional detonation of energetic components comprising pyrotechnic and explosive materials, such as air bag deployment systems, munitions and pyrotechnics. The MEM apparatus comprises an interrupting member that can be moved to block (interrupt) or complete (uninterrupt) an explosive train that is part of an energetic component. One or more latching members are provided that engage and prevent the movement of the interrupting member, until the one or more latching members are disengaged from the interrupting member. The MEM apparatus can be utilized as a safe and arm device (SAD) and electronic safe and arm device (ESAD) in preventing unintentional detonations. Methods for operating the MEM apparatus include independently applying drive signals to the actuators coupled to the latching members, and an actuator coupled to the interrupting member.

Roesler, Alexander W. (Tijeras, NM)

2012-06-05

228

Portable biochip scanner device  

DOEpatents

A portable biochip scanner device used to detect and acquire fluorescence signal data from biological microchips (biochips) is provided. The portable biochip scanner device employs a laser for emitting an excitation beam. An optical fiber delivers the laser beam to a portable biochip scanner. A lens collimates the laser beam, the collimated laser beam is deflected by a dichroic mirror and focused by an objective lens onto a biochip. The fluorescence light from the biochip is collected and collimated by the objective lens. The fluorescence light is delivered to a photomultiplier tube (PMT) via an emission filter and a focusing lens. The focusing lens focuses the fluorescence light into a pinhole. A signal output of the PMT is processed and displayed.

Perov, Alexander (Troitsk, RU); Sharonov, Alexei (Moscow, RU); Mirzabekov, Andrei D. (Darien, IL)

2002-01-01

229

Intermittent pneumatic compression devices.  

PubMed

Intermittent pneumatic compression (IPC) devices are used to aid circulation in the lower limbs as a means of preventing deep vein thrombosis--a condition that can be dangerous and even fatal if it results in a pulmonary embolism. To be effective, IPC devices need to be safe, easy to use, and comfortable. Our Evaluation tells you which products meet these qualifications and how you can select one that best suits your needs. We tested and rated the following products: the VenaFlow, supplied by Aircast/DJO; the Flowtron Excel and Flowtron Universal, supplied by Huntleigh Healthcare; the PlexiPulse and Pulse SC, supplied by Kinetic Concepts Inc. (KCI); the A-V Impulse System, SCD Express, and SCD Response, supplied by Tyco Healthcare/Kendall. PMID:17696075

2007-06-01

230

Tire deflation device  

DOEpatents

A tire deflation device includes (1) a component having a plurality of bores, (2) a plurality of spikes removably insertable into the plurality of bores and (3) a keeper within each among the plurality of bores, the keeper being configured to contact a sidewall surface of a spike among the plurality of spikes and to exert force upon the sidewall surface. In an embodiment, the tire deflation device includes (a) a component including a bore in a material, the bore including a receiving region, a sidewall surface and a base surface, (b) a channel extending from the sidewall surface into the material, (c) a keeper having a first section housed within the channel and a second section which extends past the sidewall surface into the receiving region, and (d) a spike removably insertable into the bore.

Barker, Stacey G. (Idaho Falls, ID)

2010-01-05

231

Support and maneuvering device  

DOEpatents

A support and maneuvering device includes an elongated flexible inflatable enclosure having a fixed end and a movable end. The movable end is collapsible toward the fixed end to a contracted position when the enclosure is in a noninflated condition. Upon inflation, the movable end is movable away from the fixed end to an extended position. The movable end includes means for mounting an article such as a solar reflector thereon. The device also includes a plurality of position controlling means disposed about the movable end to effect adjusting movement of portions thereof by predetermined amounts and for controlling an angle at which the article disposed at the movable end is oriented. The plurality of position controlling means limits a suitable number degrees of freedom of the movable end for transmitting a steering motion thereto and for controlling the position thereof. 9 figs.

Wood, R.L.

1987-03-23

232

Regenerative braking device  

DOEpatents

Disclosed are several embodiments of a regenerative braking device for an automotive vehicle. The device includes a plurality of rubber rollers (24, 26) mounted for rotation between an input shaft (14) connectable to the vehicle drivetrain and an output shaft (16) which is drivingly connected to the input shaft by a variable ratio transmission (20). When the transmission ratio is such that the input shaft rotates faster than the output shaft, the rubber rollers are torsionally stressed to accumulate energy, thereby slowing the vehicle. When the transmission ratio is such that the output shaft rotates faster than the input shaft, the rubber rollers are torsionally relaxed to deliver accumulated energy, thereby accelerating or driving the vehicle.

Hoppie, Lyle O. (Birmingham, MI)

1982-01-12

233

Superconducting quantum interference device  

US Patent & Trademark Office Database

The SQUID device consists of a loop of superconducting film material applied to the face of a substrate, the loop having a first width. A Josephson Junction is formed in the loop of the superconducting film material by pads of superconducting film material overlying one another and separated by a layer of insulating material. The pads have a second width larger than the first width. To increase the gain and improve the signal-to-noise ratio, the SQUID device may include a plurality of SQUID loops connected to one another in parallel. These loops may be overlie one another, or be adjacent to one another, or both, and may be either conventional SQUID loops or the improved SQUID loops with wide pads.

1996-11-12

234

Inertial energy storage device  

DOEpatents

The inertial energy storage device of the present invention comprises a composite ring formed of circumferentially wound resin-impregnated filament material, a flanged hollow metal hub concentrically disposed in the ring, and a plurality of discrete filament bandsets coupling the hub to the ring. Each bandset is formed of a pair of parallel bands affixed to the hub in a spaced apart relationship with the axis of rotation of the hub being disposed between the bands and with each band being in the configuration of a hoop extending about the ring along a chordal plane thereof. The bandsets are disposed in an angular relationship with one another so as to encircle the ring at spaced-apart circumferential locations while being disposed in an overlapping relationship on the flanges of the hub. The energy storage device of the present invention has the capability of substantial energy storage due to the relationship of the filament bands to the ring and the flanged hub.

Knight, Jr., Charles E. (Knoxville, TN); Kelly, James J. (Oak Ridge, TN); Pollard, Roy E. (Powell, TN)

1978-01-01

235

Quick stop device  

DOEpatents

A quick stop device for abruptly interrupting the cutting of a workpiece by a cutter is disclosed. The quick stop device employs an outer housing connected to an inner workpiece holder by at least one shear pin. The outer housing includes an appropriate shank designed to be received in the spindle of a machine, such as a machine tool. A cutter, such as a drill bit, is mounted in a stationary position and the workpiece, mounted to the workpiece holder, is rotated during engagement with the cutter. A trigger system includes at least one spring loaded punch disposed for movement into engagement with the workpiece holder to abruptly stop rotation of the workpiece holder. This action shears the shear pin and permits continued rotation of the spindle and outer housing without substantially disturbing the chip root formed during cutting.

Hipwell, Roger L. (35 Hounds Ditch La., Duxbury, MA 02332); Hazelton, Andrew J. (3877 Army St., San Francisco, CA 94131)

1996-01-01

236

Gas well monitoring device  

SciTech Connect

A gas well monitoring device for installation at a well head for determining bottom hole pressure of a well bore is provided. The monitoring device includes a sensing unit disposed at the well head. The sensing unit includes a pressure transducer and a temperature transducer for measuring pressure and temperature of the gas at the well head. Automatic control circuitry periodically sample the output of the transducers. A processor is interconnected to the automatic control circuitry for calculating the value of bottom hole pressure based upon the output of the transducers. Storage circuitry is interconnected to the processor for receiving and storing at predetermined time intervals related values of the sampled well head pressure and well head temperature, and the calculated value of bottom hole pressure at the predetermined time intervals. A display is provided for displaying well data stored in the storage circuitry.

Dublin, W.L. Jr.; Schrenkel, J.

1983-11-15

237

PRESSURE SENSING DEVICE  

DOEpatents

This device is primarily useful as a switch which is selectively operable to actuate in response to either absolute or differential predetermined pressures. The device generally comprises a pressure-tight housing divided by a movable impermeable diaphragm into two chambers, a reference pressure chamber and a bulb chamber containing the switching means and otherwise filled with an incompressible non-conducting fluid. The switch means comprises a normally collapsed bulb having an electrically conductive outer surface and a vent tube leading to the housing exterior. The normally collapsed bulb is disposed such that upon its inflation, respensive to air inflow from the vent, two contacts fixed within the bulb chamber are adapted to be electrically shorted by the conducting outer surface of the bulb.

Pope, K.E.

1959-12-15

238

Support and maneuvering device  

DOEpatents

A support and maneuvering device includes an elongated flexible inflatable enclosure having a fixed end and a movable end. The movable end is collapsible toward the fixed end to a contracted position when the enclosure is in a noninflated condition. Upon inflation, the movable end is movable away from the fixed end to an extended position. The movable end includes means for mounting an article such as a solar reflector thereon. The device also includes a plurality of position controlling means disposed about the movable end to effect adjusting movement of portions thereof by predetermined amounts and for controlling an angle at which the article disposed at the movable end is oriented. The plurality of position controlling means limits a suitable number degrees of freedom of the movable end for transmitting a steering motion thereto and for controlling the position thereof.

Wood, Richard L. (Arvada, CO)

1988-01-01

239

Preface: Heterostructure terahertz devices  

NASA Astrophysics Data System (ADS)

The terahertz (THz) range of frequencies is borderline between microwave electronics and photonics. It corresponds to the frequency bands of molecular and lattice vibrations in gases, fluids, and solids. The importance of the THz range is in part due to numerous potential and emerging applications which include imaging and characterization, detection of hazardous substances, environmental monitoring, radio astronomy, covert inter-satellite communications, as well as biological and medical applications. During the last decades marked progress has been achieved in the development, fabrication, and practical implementation of THz devices and systems. This is primarily owing to the utilization of gaseous and free electron lasers and frequency converters using nonlinear optical phenomena as sources of THz radiation. However, such devices and hence the systems based on them are fairly cumbersome. This continuously stimulates an extensive search for new compact and efficient THz sources based on semiconductor heterostructures. Despite tremendous efforts lasting several decades, the so-called THz gap unbridged by semiconductor heterostructure electron and optoelectron devices still exists providing appropriate levels of power of the generated THz radiation. The invention and realization of quantum cascade lasers made of multiple quantum-well heterostructures already resulted in the partial solution of the problem in question, namely, in the successful coverage of the high-frequency portion of the THz gap (2-3 THz and higher). Further advancement to lower frequencies meets, perhaps, fundamental difficulties. All this necessitates further extensive theoretical and experimental studies of more or less traditional and novel semiconductor heterostructures as a basis for sources of THz radiation. This special issue includes 11 excellent original papers submitted by several research teams representing 14 institutions in Europe, America, and Asia. Several device concepts which appear to be feasible for the realization of novel THz devices are put forward and discussed in this collection of experimental and theoretical papers. The issue starts with a paper by Akis et al which deals with a theoretical study of the operation of high electron mobility transistors at THz frequencies. For this, the authors use the numerical simulations using a full-band, cellular Monte Carlo transport model coupled to a full Poisson equation solver. The next three papers by Reklaitis, Balocco et al , and Mikhailov and Zieglel are devoted to considering new ideas related to frequency multiplication which can lead to the up-conversion of ac signals to THz frequencies. For this purpose, different concepts of the devices based on nontrivial heterostructures and materials are proposed and studied. The paper by Knap et al provides an overview of the authors experimental results on the plasma effects infield effect transistors. These effects can be used for the resonant detection of THz radiation and its emission. The observed THz emission from more complex device structures, namely, dual grating gate heterostrucures, which is attributed to the self-excitation of plasma waves, is discussed by Otsuji and his co-workers. The following two papers (by Ryzhii et al and Popov et al) deal with the development of device models and using the one which could explain the results of experimental observations described in the paper by Otsuji et al . In both these papers, the mechanisms of plasma wave instability in spatially periodic heterostructures are analyzed. In the paper by Starikov and his colleagues, an idea to utilize the transit-time resonance assisted by optical phonon emissionis revived and revisited. As demonstrated, this mechanism in the electron system in nitride-made heterostructures can lead to negative dynamic conductivity in the THz range of frequencies and, hence, be used for the generation of THz radiation. In the paper by Millithaler et al, Monte Carlo simulations are used to study the voltage fluctuationsaffected by the plasma oscillations in two-terminal

Ryzhii, Victor

2008-08-01

240

Picosecond optoelectronic devices  

SciTech Connect

Ever since the invention of picosecond lasers, scientists and electronic engineers have been dreaming of inventing electronic devices that can record in real time the physical and electronic events that take place on picosecond time scales. With the exception of the expensive streak camera, this dream has been largely unfullfilled. Today, a real-time oscilloscope with picosecond time resolution is still not available. To fill the need for even better time resolution, researchers have turned to optical pulses and thus a hybrid technology has emerged-picosecond optoelectronics. This technology, based on bulk photoconductors, has had a slow start. However, because of the simplicity, scaleability, and jitterfree nature of the devices, the technology has recently experienced a rapid growth. This volume reviews the major developments in the field of picosecond optoelectronics over the past decade.

Lee, C.L.

1984-01-01

241

Residual gas analysis device  

SciTech Connect

A system is provided for testing the hermeticity of a package, such as a microelectromechanical systems package containing a sealed gas volume, with a sampling device that has the capability to isolate the package and breach the gas seal connected to a pulse valve that can controllably transmit small volumes down to 2 nanoliters to a gas chamber for analysis using gas chromatography/mass spectroscopy diagnostics.

Thornberg, Steven M. (Peralta, NM)

2012-07-31

242

Liquid level sensing device  

DOEpatents

A liquid level sensing device comprising a load cell supporting a column or stack of segments freely resting on one another. The density of each element is substantially identical to that of the surrounding liquid. The elements are freely guided within a surrounding tube. As each element is exposed above the liquid level, its weight will be impressed through the column to the load cell, thereby providing a signal at the load cell directly proportional to the liquid level elevation.

Tokarz, Richard D. (West Richland, WA)

1983-01-01

243

Vibrating orthodontic remodelling device  

US Patent & Trademark Office Database

A bite plate allowing for contact with occlusal and facial and/or lingual maxillary and mandibular teeth is coupled to an extraoral housing containing a rechargeable battery coupled to a vibrator coupled to a processor coupled to data and charging port or ports. The housing is at least water resistant, and a hatch allows access to the data and charging port or ports only. The device is fitted with a very smooth and quiet vibrator, with minimal variance on operating specifications.

2013-08-06

244

Temperature measuring device  

SciTech Connect

Systems and methods are described for a wireless instrumented silicon wafer that can measure temperatures at various points and transmit those temperature readings to an external receiver. The device has particular utility in the processing of semiconductor wafers, where it can be used to map thermal uniformity on hot plates, cold plates, spin bowl chucks, etc. without the inconvenience of wires or the inevitable thermal perturbations attendant with them.

Lauf, R.J.; Bible, D.W.; Sohns, C.W.

1999-10-19

245

Fiber optic monitoring device  

DOEpatents

A device for the purpose of monitoring light transmissions in optical fibers comprises a fiber optic tap that optically diverts a fraction of a transmitted optical signal without disrupting the integrity of the signal. The diverted signal is carried, preferably by the fiber optic tap, to a lens or lens system that disperses the light over a solid angle that facilitates viewing. The dispersed light indicates whether or not the monitored optical fiber or system of optical fibers is currently transmitting optical information.

Samborsky, James K. (605 Groves Blvd., N. Augusta, SC 29841)

1993-01-01

246

Light actuated microfluidic devices  

Microsoft Academic Search

A light-actuated microfluidic device has been successfully fabricated to inject, move, separate, and merge liquid droplets with nano-liter volumes. Light actuation is realized by sandwiching the liquid droplets between two photosensitive surfaces whose wettability can be changed by light. By integrating a photoconductor with an electrowetting electrode, the surface tension at the liquid\\/solid interface above the electrode can be modified

Pei Yu Chiou; Zehao Chang; Ming C. Wu

2003-01-01

247

Organic Electroluminescent Devices  

Microsoft Academic Search

Electroluminescence from organic materials has the potential to enable low-cost, full-color flat-panel displays, as well as other emissive products. Some materials have now demonstrated adequate efficiencies (1 to 15 lumens\\/watt) and lifetimes (>5000 hours) for practical use; however, the factors that govern lifetime remain poorly understood. This article provides a brief review of device principles and applications requirements and focuses

James R. Sheats; Homer Antoniadis; Mark Hueschen; William Leonard; Jeff Miller; Ron Moon; Daniel Roitman; Andrew Stocking

1996-01-01

248

Temperature measuring device  

DOEpatents

Systems and methods are described for a wireless instrumented silicon wafer that can measure temperatures at various points and transmit those temperature readings to an external receiver. The device has particular utility in the processing of semiconductor wafers, where it can be used to map thermal uniformity on hot plates, cold plates, spin bowl chucks, etc. without the inconvenience of wires or the inevitable thermal perturbations attendant with them.

Lauf, Robert J. (Oak Ridge, TN); Bible, Don W. (Clinton, TN); Sohns, Carl W. (Oak Ridge, TN)

1999-01-01

249

Nanoimprinted passive optical devices  

Microsoft Academic Search

We report on the feasibility and process parameters of nanoimprint lithography to fabricate low refractive index passive optical devices. Diffraction gratings printed in polymethylmethacrylate (PMMA) exhibit a sharp dispersion with a full width at half maximum of about 20 nm. Waveguides were printed in polystyrene (PS) on silicon oxide and had losses between 8-20 dB cm-1 at wavelengths between 650-400

J. Seekamp; S. Zankovych; A. H. Helfer; P. Maury; C. M. Sotomayor Torres; G. Böttger; C. Liguda; M. Eich; B. Heidari; L. Montelius; J. Ahopelto

2002-01-01

250

Biomolecular detection device  

DOEpatents

A device for detecting and measuring the concentration of biomolecules in solution, utilizing a conducting electrode in contact with a solution containing target biomolecules, with a film with controllable pore size distribution characteristics applied to at least one surface of the conducting electrode. The film is functionalized with probe molecules that chemically interact with the target biomolecules at the film surface, blocking indicator molecules present in solution from diffusing from the solution to the electrode, thereby changing the electrochemical response of the electrode.

Huo, Qisheng (Albuquerque, NM); Liu, Jun (Albuquerque, NM)

2008-10-21

251

Sectional device handling tool  

DOEpatents

Apparatus for remotely handling a device in an irradiated underwater environment includes a plurality of tubular sections interconnected end-to-end to form a handling structure, the bottom section being adapted for connection to the device. A support section is connected to the top tubular section and is adapted to be suspended from an overhead crane. Each section is flanged at its opposite ends. Axially retractable bolts in each bottom flange are threadedly engageable with holes in the top flange of an adjacent section, each bolt being biased to its retracted position and retained in place on the bottom flange. Guide pins on each top flange cooperate with mating holes on adjacent bottom flanges to guide movement of the parts to the proper interconnection orientation. Each section carries two hydraulic line segments provided with quick-connect/disconnect fittings at their opposite ends for connection to the segments of adjacent tubular sections upon interconnection thereof to form control lines which are connectable to the device and to an associated control console.

Candee, Clark B. (Monroeville, PA)

1988-07-12

252

DNA in nanofluidic devices  

NASA Astrophysics Data System (ADS)

Nanochannels with a channel cross-section of around 100 nm x 100 nm or less are emerging as a powerful new technique for single-molecule DNA analysis. In these nanochannels, DNA is linearized to a constant fraction of its contour length, and thus spatial locations measured by fluorescence microscopy can be directly related to genomic locations. Because the stretching in nanochannels is caused by lateral confinement, molecules are free to undergo longitudinal fluctuations. Hence, time-averaging over a single molecule is meaningful, and a high resolution can be achieved even using few molecules. We will present how DNA imaging in nanochannels can be applied to common tasks in molecular biology that go beyond simple sizing. In particular, we will discuss the genomic identification of human DNA fragments using fluorescent markers, and how to perform enzymatic reactions, such as restriction mapping using endonucleases, in nanochannels. We will also present our recent progress in the development of ``nanoplumbing'', that is devices that contain junctions of nanochannels. We will show how device dimensions influence the transport of DNA at those nanochannel junctions, and how those properties can be utilized in the design of devices and exotic materials.

Riehn, Robert

2006-03-01

253

Devices of Wonder  

NSDL National Science Digital Library

The Getty Museum cleverly uses our new media toy, the World Wide Web, to showcase this exhibition of media devices from the past and present. Included are inventions that present visual information or optical illusions, such as Indonesian shadow puppets, magic lantern slides, pop-up books, thaumatropes, and anamorphic images. Both animated and non-animated versions are available, and there are tradeoffs with each. In the animated version, users can see each device in action, but it takes a little longer to simply get each device's name and information about how it works. For example, the animated thaumatrope works pretty well, since it is easy to see that it is a card with two images on the back and front that fuse when the card is spun on a string. It's a little harder to figure out how the choreutoscope works from starting with the animated version, although one gets to watch the skeleton dance. The non-animated version immediately informs us that this is a hand-cranked magic lantern slide.

2001-01-01

254

Medical Device Reporting: An Overview.  

National Technical Information Service (NTIS)

This document is intended to help manufacturers and user facilities understand the basic requirements for reporting adverse events involving medical devices as required by the Medical Device Reporting (MDR) Regulation (Title 21, Code of Federal Regulation...

1996-01-01

255

Evaluation of Load Transfer Devices.  

National Technical Information Service (NTIS)

This report describes the procedures and findings of a study conducted to evaluate two types of load transfer devices used in Louisiana--steel dowel bars and starlugs (a patented device). A statistical comparison was accomplished by evaluating existing co...

S. C. Shah W. H. Temple Z. Bolourchi

1975-01-01

256

Mobile Device Forensics - Tool Testing.  

National Technical Information Service (NTIS)

Mobile devices are an evolving form of computing, used widely for personal and organizational purposes. These compact devices are useful in managing information, such as contact details and appointments, and corresponding electronically. Over time, they a...

R. Ayers

2009-01-01

257

Nonimaging radiant energy direction device  

DOEpatents

A raidant energy nonimaging light direction device is provided. The device includes an energy transducer and a reflective wall whose contour is particularly determined with respect to the geometrical vector flux of a field associated with the transducer.

Winston, Roland (Chicago, IL)

1980-01-01

258

Combined Docking and Grasping Device.  

National Technical Information Service (NTIS)

A combined docking and grasping manipulator arm device is described. The device is comprised of a single manipulator arm for both docking and for performing general work between orbital vehicles and orbital payloads.

J. L. Burch J. D. Johnston

1975-01-01

259

Mechanical device for tissue regeneration  

Microsoft Academic Search

The invention relates to a mechanical device for tissue- regeneration inside a patient, comprising means (2, 3) to place a scaffold for the tissue under mechanical stress. Said means comprise a first device-part (2) and a second device-part (3) which parts are arranged to be movable with respect to each other, and wherein the first device-part supports a first receptacle

J. L. Herder; E. Maij

2010-01-01

260

Vacuum microelectronic devices [and prolog  

Microsoft Academic Search

In this review\\/tutorial paper, we cover the history, physics, and current status of vacuum microelectronic devices. First we overview the performance requirements of vacuum microelectronic devices necessary for them to replace, or fill voids left by, solid state devices. Next we discuss the physical characteristics of micro-field-emission sources important to device applications. These characteristics include fundamental features, such as current-voltage

IVOR BRODIE; PAUL RICHARD SCHWOEBEL

1994-01-01

261

Advanced Semiconductor Devices  

NASA Astrophysics Data System (ADS)

I. Wide band gap devices. Wide-Bandgap Semiconductor devices for automotive applications / M. Sugimoto ... [et al.]. A GaN on SiC HFET device technology for wireless infrastructure applications / B. Green ... [et al.]. Drift velocity limitation in GaN HEMT channels / A. Matulionis. Simulations of field-plated and recessed gate gallium nitride-based heterojunction field-effect transistors / V. O. Turin, M. S. Shur and D. B. Veksler. Low temperature electroluminescence of green and deep green GaInN/GaN light emitting diodes / Y. Li ... [et al.]. Spatial spectral analysis in high brightness GaInN/GaN light emitting diodes / T. Detchprohm ... [et al.]. Self-induced surface texturing of Al2O3 by means of inductively coupled plasma reactive ion etching in Cl2 chemistry / P. Batoni ... [et al.]. Field and termionic field transport in aluminium gallium arsenide heterojunction barriers / D. V. Morgan and A. Porch. Electrical characteristics and carrier lifetime measurements in high voltage 4H-SiC PiN diodes / P. A. Losee ... [et al.]. Geometry and short channel effects on enhancement-mode n-Channel GaN MOSFETs on p and n- GaN/sapphire substrates / W. Huang, T. Khan and T. P. Chow. 4H-SiC Vertical RESURF Schottky Rectifiers and MOSFETs / Y. Wang, P. A. Losee and T. P. Chow. Present status and future Directions of SiGe HBT technology / M. H. Khater ... [et al.]Optical properties of GaInN/GaN multi-quantum Wells structure and light emitting diode grown by metalorganic chemical vapor phase epitaxy / J. Senawiratne ... [et al.]. Electrical comparison of Ta/Ti/Al/Mo/Au and Ti/Al/Mo/Au Ohmic contacts on undoped GaN HEMTs structure with AlN interlayer / Y. Sun and L. F. Eastman. Above 2 A/mm drain current density of GaN HEMTs grown on sapphire / F. Medjdoub ... [et al.]. Focused thermal beam direct patterning on InGaN during molecular beam epitaxy / X. Chen, W. J. Schaff and L. F. Eastman -- II. Terahertz and millimeter wave devices. Temperature-dependent microwave performance of Sb-heterostructure backward diodes for millimeter-wave detection / N. Su ... [et al.]. A Mixed-signal row/Column architecture for very large monolithic mm-wave phased arrays / C. Carta, M. Seo and M. Rodwell. Terahertz emission from electrically pumped silicon germanium itersubband devices / N. Sustersic [et al.]. Terahertz sensing of materials / G. Xuan ... [et al.] -- III. silicon and SiGe devices. Negative bias temperature instability in TiN/HF-Silicate based gate stacks / N. A. Chowdhury, D. Misra and N. Rahim. Power adaptive control of dense configured super-self-aligned back-gate planar transistors / H. Lin ... [et al.]. Non-volatile high speed & low power charge trapping devices / M. K. Kim and S. Tiwari. High performance SiGeC/Si Near-IR electrooptic modulators and photodetectors / M. Schubert and F. Rana -- III. Silicon and SiGe devices. Negative bias temperature instability in TiN/HF-Silicate based gate stacks / N. A. Chowdhury, D. Misra and N. Rahim. Power adaptive control of dense configured super-self-aligned back-gate planar transistors / H. Lin ... [et al.]Non-volatile high speed & low power charge trapping devices / M. K. Kim and S. Tiwari. High performance SiGeC/Si Near-IR electrooptic modulators and photodetectors / M. Schubert and F. Rana -- IV. Nanoelelectronics and ballistic devices. Hybrid nanomaterials for multi-spectral infrared photodetection / A. D. Stiff-Roberts. Ballistic electron acceleration negative-differential-conductivity devices / B. Aslan ... [et al.] -- V. Photoluminescence and photocapacitance. Understanding ultraviolet emitter performance using intensity dependent Time-Resolved photoluminescence / M. Wraback ... [ et al.]. Photocapacitance of selectively doped AlGaAs/GaAs heterostructures containing deep traps / N. B. Gorev ... [et al.

Shur, Michael S.; Maki, Paul A.; Kolodzey, James

2007-06-01

262

Stop device for well conduit  

Microsoft Academic Search

The invention provides a stop device for installation on a well conduit. The stop device is fabricated from semi-annular elements having one ends thereof pivotally interconnected by a hook and notch connection and the other ends stamped to provide apertured lugs traversed by a clamping device. The effective diameter of the stop is increased by a plurality of peripherally spaced,

1985-01-01

263

Database Classification of Mobile Devices  

Microsoft Academic Search

Mobile devices can be categorized into three categories: mobile phones, PDAs (personal digital assistant) and smart phones. All of them play an important role for mobile services because they are the interface to the users. Currently there is no consistent methodology to describe mobile devices. This project shows an approach to describe mobile devices. The result is a database with

Sebastian Gansemer; Uschi Gröner; Manuel Maus

2007-01-01

264

Resonant cavity enhanced photonic devices  

Microsoft Academic Search

We review the family of optoelectronic devices whose performance is enhanced by placing the active device structure inside a Fabry-Perot resonant microcavity. Such resonant cavity enhanced (RCE) devices benefit from the wavelength selectivity and the large increase of the resonant optical field introduced by the cavity. The increased optical field allows RCE photodetector structures to be thinner and therefore faster,

M. Selim Ünlü; Samuel Strite

1995-01-01

265

FDA's perspectives on cardiovascular devices.  

PubMed

The Food and Drug Administration (FDA) decision process for approving or clearing medical devices is often determined by a review of robust clinical data and extensive preclinical testing of the device. The mission statement for the Center for Devices and Radiological Health (CDRH) is to review the information provided by manufacturers so that it can promote and protect the health of the public by ensuring the safety and effectiveness of medical devices deemed appropriate for human use (Food, Drug & Cosmetic Act, Section 903(b)(1, 2(C)), December 31, 2004; accessed December 17, 2008 http://www.fda.gov/opacom/laws/fdcact/fdctoc.htm). For high-risk devices, such as ventricular assist devices (VADs), mechanical heart valves, stents, cardiac resynchronization therapy (CRT) devices, pacemakers, and defibrillators, the determination is based on FDA's review of extensive preclinical bench and animal testing followed by use of the device in a clinical trial in humans. These clinical trials allow the manufacturer to evaluate a device in the intended use population. FDA reviews the data from the clinical trial to determine if the device performed as predicted and the clinical benefits outweigh the risks. This article reviews the regulatory framework for different marketing applications related to cardiovascular devices and describes the process of obtaining approval to study a cardiovascular device in a U.S. clinical trial. PMID:20559979

Chen, Eric A; Patel-Raman, Sonna M; O'Callaghan, Kathryn; Hillebrenner, Matthew G

2009-03-10

266

Stretchable and foldable electronic devices  

DOEpatents

Disclosed herein are stretchable, foldable and optionally printable, processes for making devices and devices such as semiconductors, electronic circuits and components thereof that are capable of providing good performance when stretched, compressed, flexed or otherwise deformed. Strain isolation layers provide good strain isolation to functional device layers. Multilayer devices are constructed to position a neutral mechanical surface coincident or proximate to a functional layer having a material that is susceptible to strain-induced failure. Neutral mechanical surfaces are positioned by one or more layers having a property that is spatially inhomogeneous, such as by patterning any of the layers of the multilayer device.

Rogers, John A; Huang, Yonggang; Ko, Heung Cho; Stoykovich, Mark; Choi, Won Mook; Song, Jizhou; Ahn, Jong Hyun; Kim, Dae Hyeong

2013-10-08

267

Microwave semiconductor devices  

NASA Astrophysics Data System (ADS)

The state of the art of microwave semiconductor design is reviewed, with emphasis on developments of the past 10-12 years. Consideration is given to: varistor diodes; varactor diodes; and transit time negative diodes. The design principles of bipolar and unipolar transistors are discussed, with reference to power FETs, traveling-wave FETs, and camel or planar-doped barrier transistors. Recent innovations in the field of fabrication technology are also considered, including: crystal growth; doping; and packaging. Several schematic drawings and photographs of the different devices are provided.

Sitch, J. E.

1985-03-01

268

Coordinating overcurrent protection devices  

SciTech Connect

Distribution, substation, and plant engineers can benefit from using an overcurrent protection program in commercial, industrial, and utility applications to aid in clearing temporary faults and isolating permanent faults. In the time it normally takes to check one coordination scheme manually, dozens of alternatives can be evaluated using a graphics-oriented program, because the engineer receives immediate feedback for quick decision-making. It is well known that accurately coordinating overcurrent protection devices can minimize or prevent equipment damage, and electrical power service to customers can be greatly improved. In addition to assisting experienced engineers, an overcurrent protection program is an excellent training tool for new engineers.

St. John, M.; Borgnino, A.

1996-07-01

269

Assistive devices for ambulation.  

PubMed

Interacting with other people and the environment is fundamental to quality of life. Canes, walkers, and crutches increase, maintain, or improve functional capabilities of many individuals with neurologic disorders. Canes offer a choice of handle, shaft, and base. Walkers have various types of base, uprights, handgrips, platforms, and accessories. Crutch designs include underarm, triceps, forearm, and platform. Orthoses, particularly ankle foot orthoses and knee ankle foot orthoses, are often used to stabilize or immobilize lower limb segments while walking. Studies have shown the benefits of traditional assistive devices on gait, when prescribed and used properly. PMID:23598264

Edelstein, Joan E

2013-01-18

270

Fiber optic monitoring device  

DOEpatents

A device for the purpose of monitoring light transmissions in optical fibers comprises a fiber optic tap that optically diverts a fraction of a transmitted optical signal without disrupting the integrity of the signal. The diverted signal is carried, preferably by the fiber optic tap, to a lens or lens system that disperses the light over a solid angle that facilitates viewing. The dispersed light indicates whether or not the monitored optical fiber or system of optical fibers is currently transmitting optical information. 4 figures.

Samborsky, J.K.

1993-10-05

271

Fuel saving device  

SciTech Connect

The present invention relates to a fuel saving device adaptable to all types of carburetors, petrol engines and domestic or industrial burners, constituted by a solenoid generating a magnetic field which has an influence on the air-fuel mixture. Said solenoid has a red copper coil, has its axis oriented in parallel to the axis of the engine, and, periodically, in a first pre-determined direction, during the moon phase which goes from the full moon to the new moon, and in a second, opposite, direction, during the moon phase going from the new moon to the full moon. The invention finds an application in motor engine of low consumption.

Imbert, J. C.

1984-01-10

272

RADIATION MEASURING DEVICES  

DOEpatents

A radiation-measuring device is described having an a-c output. The apparatus has a high-energy particle source responsive to radiation flux disposed within a housing having a pair of collector plates. A potential gradient between the source and collector plates causes ions to flow to the plates. By means of electrostatic or magnetic deflection elements connected to an alternating potential, the ions are caused to flow alternately to each of the collector plates causing an a-c signal thereon.

Bouricius, G.M.B.; Rusch, G.K.

1960-03-22

273

49 CFR 179.200-16 - Gauging devices, top loading and unloading devices, venting and air inlet devices.  

Code of Federal Regulations, 2011 CFR

...unloading devices, venting and air inlet devices. (a...be equipped with one separate air connection. (b) When...bowl must be of good welding quality in conjunction with the...discharge devices, or venting and air inlet devices are...

2011-10-01

274

49 CFR 179.200-16 - Gauging devices, top loading and unloading devices, venting and air inlet devices.  

Code of Federal Regulations, 2012 CFR

...unloading devices, venting and air inlet devices. (a...be equipped with one separate air connection. (b) When...bowl must be of good welding quality in conjunction with the...discharge devices, or venting and air inlet devices are...

2012-10-01

275

Fluid flow monitoring device  

DOEpatents

This invention consists of a flow meter and temperature measuring device comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips.

McKay, M.D.; Sweeney, C.E.

1991-03-05

276

Fluid flow monitoring device  

DOEpatents

A flow meter and temperature measuring device comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips.

McKay, Mark D. (1426 Socastee Dr., North Augusta, SC 29841); Sweeney, Chad E. (3600 Westhampton Dr., Martinez, GA 30907-3036); Spangler, Jr., B. Samuel (2715 Margate Dr., Augusta, GA 30909)

1993-01-01

277

Thermoplastic tape compaction device  

DOEpatents

A device for bonding a thermoplastic tape to a substrate to form a fully consolidated composite. This device has an endless chain associated with a frame so as to rotate in a plane that is perpendicular to a long dimension of the tape, the chain having pivotally connected chain links with each of the links carrying a flexible foot member that extends outwardly from the chain. A selected number of the foot members contact the tape, after the heating thereof, to cause the heated tape to bond to the substrate. The foot members are each a thin band of metal oriented transversely to the chain, with a flexibility and width and length to contact the tape so as to cause the tape to conform to the substrate to achieve consolidation of the tape and the substrate. A biased leaf-type spring within the frame bears against an inner surface of the chain to provide the compliant pressure necessary to bond the tape to the substrate. The chain is supported by sprockets on shafts rotatably supported in the frame and, in one embodiment, one of the shafts has a drive unit to produce rotation such that the foot members in contact with the tape move at the same speed as the tape. Cooling jets are positioned along the frame to cool the resultant consolidated composite.

Campbell, Vincent W. (Oak Ridge, TN)

1994-01-01

278

Inhalation incentive device  

US Patent & Trademark Office Database

An inhalation device for indicating inhalation flow rate and the passage of time between inhalations, including a vertical cylindrical chamber having a lower first closed end with a first one-way valve for allowing gas flow into said chamber, an upper second closed end, an outlet proximate said upper closed end for inhalation, the interior surface of the sidewalls of said chamber defining an inside horizontal cross sectional area substantially constant from said first closed end to an area intermediate said first closed end and said second closed end, said chamber sidewalls further defining a gradually increasing horizontal cross sectional area from said intermediate area to said second closed end. Disposed vertically within said vertical chamber and concentrically aligned therewith is a tubular member with a plurality of openings proximate said upper closed end, said tubular member being in communication with an inhalation exhalation outlet and a second one-way valve for exhalation. Said device further includes a horizontal indicator disc disposed within said chamber having a horizontal cross sectional area slightly less than said substantially constant horizontal cross sectional area of said chamber, said indicator disc guided vertically within said chamber by means of said tubular member.

Lester; Victor E. (Sonora, CA)

1981-08-18

279

Devices as destination therapy.  

PubMed

The use of circulatory support as destination therapy has been a goal for the treatment of endstage heart failure for several decades. Current investigations are evaluating several circulatory pumps with that particular objective. With continued modification of design, the current and future pumps will become more reliable and provide improved quality of life to patients in need of mechanical circulatory assistance. The new pumps on the horizon specifically address reliability, size, and cost, and are based on the centrifugal system. These devices use the Maglev (Magnetic Levitation) concept that allows for frictionless pumping, low thrombogenicity, minimal noise, and increased durability. Further research with this goal in mind and support from the federal government will be the key to the future use of circulatory assistance as destination therapy for heart failure patients. In addition, the cost-effectiveness of these devices will need to be maintained as the technology improves, as in any new technology that confronts a more intuitive option like the native heart. PMID:12790046

Kukuy, Eugene L; Oz, Mehmet C; Rose, Eric A; Naka, Yoshifumi

2003-02-01

280

Automobile protection device  

SciTech Connect

A protective device is described for a motor vehicle having a body, the device comprising: an elongate guard member having a longitudinal axis oriented substantially parallel to the longitudinal axis of the vehicle, the guard member being length-variable along the axis between a contracted position and an extended position; and pivot means, having a first member operatively connected to the underside of the vehicle and a second member pivotally connected to the guard member, for movably mounting the guard member to the vehicle for movement between a lower position and an upper position along the side of the vehicle. The guard member is lengthened by the pivot means along the axis from the contracted position to the extended position when the guard member is raised from the lower position to the upper position. The guard member is shortened by the pivot means along the axis from the extended position to the contracted position when the guard member is lowered from the upper position to the lower position.

Swanson, M.E.; Swanson, G.E.

1987-03-10

281

Smart hydrogels in devices  

NASA Astrophysics Data System (ADS)

Hydrogels are materials which will swell in water but not dissolve. They are a large family of materials rather than a single entity. Indeed much of living tissue comprises hydrogel and the variety and function of this class presents the scope for the development of synthetic materials which can perform many so-called 'Smart' functions. The action of muscles, the selectivity of membranes and the contraction and expansion of various sphincters and the control of blood flow in veins and arteries might all be simulated with synthetic analogues. Such materials are now being demonstrated and systems which undergo large dimensional changes with changes in hydrogen ion or other ionic concentration have been reported while hydrogels which bend when subjected to an electrical potential difference have been made. Hydrogels can be incorporated into devices which can act as transducers, as sensors and as accurately controlled timing devices for the release of drugs and in other potential applications. This paper will illustrate a selection of these applications utilizing hydrogels developed in our laboratories and based on crosslinked poly (ethylene oxide). The dry form of the hydrogel will be referred to as a xerogel and the term hydrogel will refer to the material swollen to some degree with water.

Graham, Neil B.

1994-09-01

282

Carbon based prosthetic devices  

SciTech Connect

This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project objective was to evaluate the use of carbon/carbon-fiber-reinforced composites for use in endoprosthetic devices. The application of these materials for the metacarpophalangeal (MP) joints of the hand was investigated. Issues concerning mechanical properties, bone fixation, biocompatibility, and wear are discussed. A system consisting of fiber reinforced materials with a pyrolytic carbon matrix and diamond-like, carbon-coated wear surfaces was developed. Processes were developed for the chemical vapor infiltration (CVI) of pyrolytic carbon into porous fiber preforms with the ability to tailor the outer porosity of the device to provide a surface for bone in-growth. A method for coating diamond-like carbon (DLC) on the articulating surface by plasma-assisted chemical vapor deposition (CVD) was developed. Preliminary results on mechanical properties of the composite system are discussed and initial biocompatibility studies were performed.

Devlin, D.J.; Carroll, D.W.; Barbero, R.S.; Archuleta, T. [Los Alamos National Lab., NM (US); Klawitter, J.J.; Ogilvie, W.; Strzepa, P. [Ascension Orthopedics (US); Cook, S.D. [Tulane Univ., New Orleans, LA (US). School of Medicine

1998-12-31

283

21 CFR 874.5840 - Antistammering device.  

Code of Federal Regulations, 2013 CFR

...5840 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES EAR, NOSE, AND THROAT DEVICES Therapeutic Devices § 874.5840 Antistammering device. (a) Identification....

2013-04-01

284

16 CFR 1507.8 - Wheel devices.  

Code of Federal Regulations, 2013 CFR

... CONSUMER PRODUCT SAFETY COMMISSION FEDERAL HAZARDOUS SUBSTANCES ACT REGULATIONS FIREWORKS DEVICES § 1507.8 Wheel devices. Drivers in fireworks devices commonly known as âwheelsâ shall be securely attached to the device so...

2013-01-01

285

29 CFR 1926.1415 - Safety devices.  

Code of Federal Regulations, 2013 CFR

...Derricks in Construction § 1926.1415 Safety devices. (a) Safety devices. The following safety devices are required on all equipment covered...must have an integral holding device/check valve. (6) Equipment on rails must have...

2013-07-01

286

47 CFR 15.103 - Exempted devices.  

Code of Federal Regulations, 2012 CFR

...etc. (e) Specialized medical digital devices (generally used at the...facility. Non-specialized medical devices, i.e. , devices...directly connected with medical treatment. (f) Digital devices that have a power...

2012-10-01

287

False color viewing device  

DOEpatents

This invention consists of a viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching, the user`s eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage.

Kronberg, J.W.

1991-05-08

288

Tunable surface plasmon devices  

DOEpatents

A tunable extraordinary optical transmission (EOT) device wherein the tunability derives from controlled variation of the dielectric constant of a semiconducting material (semiconductor) in evanescent-field contact with a metallic array of sub-wavelength apertures. The surface plasmon resonance wavelength can be changed by changing the dielectric constant of the dielectric material. In embodiments of this invention, the dielectric material is a semiconducting material. The dielectric constant of the semiconducting material in the metal/semiconductor interfacial region is controllably adjusted by adjusting one or more of the semiconductor plasma frequency, the concentration and effective mass of free carriers, and the background high-frequency dielectric constant in the interfacial region. Thermal heating and/or voltage-gated carrier-concentration changes may be used to variably adjust the value of the semiconductor dielectric constant.

Shaner, Eric A. (Rio Rancho, NM); Wasserman, Daniel (Lowell, MA)

2011-08-30

289

Multichannel optical sensing device  

DOEpatents

A multichannel optical sensing device is disclosed, for measuring the outr sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.

Selkowitz, Stephen E. (Piedmont, CA)

1990-01-01

290

Pollutant suppression device  

SciTech Connect

A pollutant suppression device is described comprising: a power supply, means for generating liquid droplets, and a charging head, the charging head being electrically connected to the power supply, the charging head being positioned to receive the droplets from the generating means and to induce an electrostatic charge onto the droplets, and the charging head comprising at least two generally concentric rings, the outer ring being constructed of an insulating plastic material having a resistivity greater than about 10/sup 12/ ohm-cm, the inner ring being constructed of a generally insulating plastic material having a resistivity in the range of about 10/sup 8/ ohm-cm to about 10/sup 10/ ohm-cm.

Hastings, E.E.

1987-06-02

291

Energy generating device  

SciTech Connect

A device for generating power from the energy of waves in a body of liquid employs a buoyant reaction element and at least one displacement element which can move back and forth to react against the reaction element. The movement of the displacement element which is caused by the cyclic application of wave forces is converted into a more readily usable form by a turbine driven by the flow of air or hydraulic fluid caused by the movement of the displacement element. Where the air or hydraulic flow is bidirectional, the turbine can be of the self-rectifying type so that it is driven unidirectionally. The turbine may, for example, drive a generator that produces electrical power. Where a plurality of displacement elements are employed, some of the displacement elements are arranged to be out of phase relative to others of the displacement elements.

Wood, E.

1984-05-15

292

Personal annunciation device  

DOEpatents

A personal annunciation device (PAD) providing, in an area of interest, compensatory annunciation of the presence of an abnormal condition in a hazardous area and accountability of the user of the PAD. Compensatory annunciation supplements primary annunciation provided by an emergency notification system (ENS). A detection system detects an abnormal condition, and a wireless transmission system transmits a wireless transmission to the PAD. The PAD has a housing enclosing the components of the PAD including a communication module for receiving the wireless transmission, a power supply, processor, memory, annunciation system, and RFID module. The RFID module has an RFID receiver that listens for an RFID transmission from an RFID reader disposed in a portal of an area of interest. The PAD identifies the transmission and changes its operating state based on the transmission. The RFID readers recognize, record, and transmit the state of the PAD to a base station providing accountability of the wearer.

Angelo, Peter (Oak Ridge, TN); Younkin, James (Oak Ridge, TN); DeMint, Paul (Kingston, TN)

2011-01-25

293

TWO-SPEED DEVICE  

DOEpatents

A two-speed device is described comprising a two-part stop engageable with a follower. The two-pant stop comprises first and second members in threaded engagement with each other. The first member is restrained against rotation but is free to move longitudinally, and the second member is free to move arially and rotatively. Means are provided to impart rotation to the second member. The follower is engageable first with an end of one member and then with the corresponding end of the other member after some relative longitudinal movement of the members with respect to one another due to the rotation of the second member and the holding of the first member against rotation.

Brunson, G.S. Jr.

1961-04-01

294

Color contrast radiographic device  

SciTech Connect

An x-ray image converter for converting x-rays to visible light after passage through a photographed object in order to produce improved colored radiographs on an associated color photographic film attributable to localized color shift in the photographic film medium. The desired color shift produced by the x-ray image converter is achieved with use of a phosphor material which exhibits differential absorption of the x-radiation in the 35-50 kev region due to K alpha edge effects. In the conversion of xrays to visible light in the desired manner, the new phosphor combination is useful in x-ray image intensifier tubes, in fluoroscopic screens, in radiographic intensifier screens, and other x-ray image converter devices.

Rabatin, J.G.

1980-03-25

295

Air bag restraint device  

DOEpatents

A rear-seat air bag restraint device is disclosed that prevents an individual, or individuals, from continuing violent actions while being transported in a patrol vehicle's rear seat without requiring immediate physical contact by the law enforcement officer. The air bag is activated by a control switch in the front seat and inflates to independently restrict the amount of physical activity occurring in the rear seat of the vehicle while allowing the officer to safely stop the vehicle. The air bag can also provide the officer additional time to get backup personnel to aid him if the situation warrants it. The bag is inflated and maintains a constant pressure by an air pump.

Marts, Donna J. (Idaho Falls, ID); Richardson, John G. (Idaho Falls, ID)

1995-01-01

296

Tool setting device  

DOEpatents

The present invention relates to a tool setting device for use with numerically controlled machine tools, such as lathes and milling machines. A reference position of the machine tool relative to the workpiece along both the X and Y axes is utilized by the control circuit for driving the tool through its program. This reference position is determined for both axes by displacing a single linear variable displacement transducer (LVDT) with the machine tool through a T-shaped pivotal bar. The use of the T-shaped bar allows the cutting tool to be moved sequentially in the X or Y direction for indicating the actual position of the machine tool relative to the predetermined desired position in the numerical control circuit by using a single LVDT.

Brown, Raymond J. (Clinton, TN)

1977-01-01

297

Flywheel energy storage device  

SciTech Connect

An energy-storing flywheel device is described for a motor vehicle comprising: a rotary flywheel on a vertical shaft, the flywheel being releasably couplable to a drive means and being adapted to drive a driven mechanism; the shaft having a shaft axis; a bearing means for journally supporting the shaft, the flywheel including a rotatable magnetic ring structure supporting permanent magnets; and a spacing piece disposed between the rotatable magnetic ring structure and the shaft; and a magnetic supporting means for the rotatable magnetic ring structure. The magnetic supporting means comprises a stationary magnetic ring structure concentric about the shaft axis and below the rotary ring structure. The stationary magnetic ring structure supports permanent magnets.

Scheller, W.G.

1987-05-26

298

CUSP-PINCH DEVICE  

DOEpatents

An ion-electron plasma heating device of the pinch tube class is designed with novel means for counteracting the instabilities of an ordinary linear pinch discharge. A plasma-forming discharge is created between two spacedapart coaxial electiodes through a gas such as deuterium. A pair of spaced coaxial magnetic field coils encircle the discharge and carry opposing currents so that a magnetic field having a cuspate configuration is created around the plasma, the field being formed after the plasma has been established but before significant instability arises. Thus, containment time is increased and intensified heating is obtained. In addition to the pinch compression heating additional heating is obtained by high-frequency magnetic field modulation. (AEC)

Baker, W.R.; Watteau, J.P.H.

1962-06-01

299

Vision restriction device (VRD)  

NASA Astrophysics Data System (ADS)

In geographical areas where low-level nighttime training with high-speed aircraft is restricted, it becomes imperative to employ a vision restriction device (VRD) that simulates nighttime conditions during daytime training. In response to this requirement, a new 'bifocal' visor has been designed and evaluated. It consists of spectrally selective filters centered on the eyes, a neutral density lower portion, and is opaque elsewhere. The filters increase the contrast of the navigation forward-looking infrared (FLIR) image projected onto the heads up display (HUD). The neutral density portion allows the pilot to see all displays in full color by simply glancing down. The remainder of the visor is opaque so that the pilot cannot see the outside world and, as such, the visor simulates nighttime conditions. Initial pilot response has been favorable and flight tests are currently underway for evaluation purposes.

Holst, Gerald C.

1989-03-01

300

Carbon nanotube intramolecular devices  

NASA Astrophysics Data System (ADS)

By introducing a pentagon and a heptagon into the hexagonal carbon lattice, two nanotube segments with different atomic and electronic structures can be seamlessly fused together to create junctions within a single nanotube molecule. These junctions could form building blocks for nanotube-based molecular electronics. We have performed electrical measurements of nanotubes with such intramolecular junctions. We find that a metal-semiconductor junction behaves as a rectifying diode with nonlinear and strongly asymmetric current-voltage characteristics. In the case of a metal-metal junction, the conductance appears to be strongly suppressed and it displays a power-law dependence on temperature and voltage, consistent with tunneling between the ends of two Luttinger liquids. We will also discuss intramolecular devices created by mechanical deformation. [1] Z. Yao, H. Postma, L. Balents and C. Dekker, Nature 402, 273 (1999).

Yao, Zhen; Postma, Henk; Dekker, Cees

2000-03-01

301

Ceramics for fusion devices  

SciTech Connect

Ceramics are required for a number of applications in fusion devices, among the most critical of which are magnetic coil insulators, windows for RF heating systems, and structural uses. Radiation effects dominate consideration of candidate materials, although good pre-irradiation properties are a requisite. Materials and components can be optimized by careful control of chemical and microstructural content, and application of brittle material design and testing techniques. Future directions for research and development should include further extension of the data base in the areas of electrical, structural, and thermal properties; establishment of a fission neutron/fusion neutron correlation including transmutation gas effects; and development of new materials tailored to meet the specific needs of fusion reactors.

Clinard, F.W. Jr.

1984-01-01

302

Nuclear reactor safety device  

DOEpatents

A safety device is described for use in a nuclear reactor for axially repositioning a control rod with respect to the reactor core in the event of a thermal excursion. It comprises a laminated strip helically configured to form a tube, said tube being in operative relation to said control rod. The laminated strip is formed of at least two materials having different thermal coefficients of expansion, and is helically configured such that the material forming the outer lamina of the tube has a greater thermal coefficient of expansion than the material forming the inner lamina of said tube. In the event of a thermal excursion the laminated strip will tend to curl inwardly so that said tube will increase in length, whereby as said tube increases in length it exerts a force on said control rod to axially reposition said control rod with respect to said core.

Hutter, E.

1983-08-15

303

Intrauterine Contraceptive Devices  

PubMed Central

Although the ideal contraceptive has not been found, intrauterine contraceptive devices offer distinct advantages and provide adequate contraception. Unfortunately, they have side-effects, complications and failures. Their use is contraindicated in pregnancy, abnormalities of the uterine cavity, uterine hypoplasia, infection and abnormal uterine bleeding. Patients who have had an ectopic pregnancy, who are prone to endocarditis, who have allergies to copper, or who are taking anticoagulants also should not use IUCDs, Insertion is best performed during menstruation, and the patient should be seen in follow up to assess placement and any side-effects, including cramps, bleeding, vaginal discharge, or discomfort during intercourse. Pregnancy may occur when the IUCD is in place, and prompt diagnosis is mandatory. Depending on the type of IUCD used, replacement time varies from one to three years.

Cardoso, Reynaldo

1983-01-01

304

Air bag restraint device  

SciTech Connect

A rear-seat air bag restraint device is disclosed that prevents an individual, or individuals, from continuing violent actions while being transported in a patrol vehicle's rear seat without requiring immediate physical contact by the law enforcement officer. The air bag is activated by a control switch in the front seat and inflates to independently restrict the amount of physical activity occurring in the rear seat of the vehicle while allowing the officer to safely stop the vehicle. The air bag can also provide the officer additional time to get backup personnel to aid him if the situation warrants it. The bag is inflated and maintains a constant pressure by an air pump.

Marts, Donna J. (Idaho Falls, ID); Richardson, John G. (Idaho Falls, ID)

1995-01-01

305

Left Ventricular Assist Devices  

PubMed Central

Executive Summary Objective The objective of this health technology policy assessment was to determine the effectiveness and cost-effectiveness of using implantable ventricular assist devices in the treatment of end-stage heart failure. Heart Failure Heart failure is a complex syndrome that impairs the ability of the heart to maintain adequate blood circulation, resulting in multiorgan abnormalities and, eventually, death. In the period of 1994 to 1997, 38,702 individuals in Ontario had a first hospital admission for heart failure. Despite reported improvement in survival, the five-year mortality rate for heart failure is about 50%. For patients with end-stage heart failure that does not respond to medical therapy, surgical treatment or traditional circulatory assist devices, heart transplantation (in appropriate patients) is the only treatment that provides significant patient benefit. Heart Transplant in Ontario With a shortage in the supply of donor hearts, patients are waiting longer for a heart transplant and may die before a donor heart is available. From 1999 to 2003, 55 to 74 people received a heart transplant in Ontario each year. Another 12 to 21 people died while waiting for a suitable donor heart. Of these, 1 to 5 deaths occurred in people under 18 years old. The rate-limiting factor in heart transplant is the supply of donor hearts. Without an increase in available donor hearts, attempts at prolonging the life of some patients on the transplant wait list could have a harmful effect on other patients that are being pushed down the waiting list (knock on effect). LVAD Technology Ventricular assist devices [VADs] have been developed to provide circulatory assistance to patients with end-stage heart failure. These are small pumps that usually assist the damaged left ventricle [LVADs] and may be situated within the body (intracorporeal] or outside the body [extracorporeal). Some of these devices were designed for use in the right ventricle [RVAD] or both ventricles (bi-ventricular). LVADs have been mainly used as a “bridge-to-transplant” for patients on a transplant waiting list. As well, they have been used as a “bridge-to-recovery” in acute heart failure, but this experience is limited. There has been an increasing interest in using LVAD as a permanent (destination) therapy. Review of LVAD by the Medical Advisory Secretariat The Medical Advisory Secretariat’s review included a descriptive synthesis of findings from five systematic reviews and 60 reports published between January 2000 and December 2003. Additional information was obtained through consultation and by searching the websites of Health Canada, the United Network of Organ Sharing, Organ Donation Ontario, and LVAD manufacturers. Summary of Findings Safety and Effectiveness Previous HTAs and current Level 3 evidence from prospective non-randomized controlled studies showed that when compared to optimal medical therapy, LVAD support significantly improved the pre-transplant survival rates of heart transplant candidates waiting for a suitable donor heart (71% for LVAD and 36% for medical therapy). Pre-transplant survival rates reported ranged from 58% to 90% (median 74%). Improved transplant rates were also reported for people who received pre-transplant LVAD support (e.g. 67% for LVAD vs 33% for medical therapy). Reported transplant rates for LVAD patients ranged from 39% to 90% (median 71%). Patient’s age greater than 60 years and pre-existing conditions of respiratory failure associated with septicemia, ventilation, and right heart failure were independent risk factors for mortality after the LVAD implantation. LVAD support was shown to improve the New York Heart Association [NYHA)] functional classification and quality of life of patients waiting for heart transplant. LVAD also enabled approximately 41% - 49% of patients to be discharged from hospitals and wait for a heart transplant at home. However, over 50% of the discharged patients required re-hospitalization due to adverse events. Post-transplant surviv

2004-01-01

306

False color viewing device  

DOEpatents

A viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching the user's eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage.

Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)

1992-01-01

307

False color viewing device  

DOEpatents

A viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching the user's eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage. 7 figs.

Kronberg, J.W.

1992-10-20

308

Wavelength conversion device  

US Patent & Trademark Office Database

A feature of a wavelength conversion device of this invention is the board range of selection of wavelengths which can be obtained by conversion. A wavelength conversion device of this invention comprises an SC light generation portion 12, which receives an excitation light pulse output from an excitation light pulse source and generates SC light, and an optical wavelength filter 14 which filters the SC light. An excitation light pulse source generates an excitation light pulse, of central wavelength .lamda..sub.S. When the excitation light pulse generated by the excitation light pulse source is incident on the SC medium, SC light having a flat spectral shape over the range from wavelength .lamda..sub.L to wavelength .lamda..sub.H (where .lamda..sub.L<.lamda..sub.H) is generated. The optical wavelength filter has a characteristic such that the filtering transmitted central wavelengths are .lamda..sub.1, .lamda..sub.2, .lamda..sub.3, . . . , .lamda..sub.n (where n is a natural number). A further feature is that the following conditions (1) and (2-1), (2-2), . . . , (2-n) between the wavelength .lamda..sub.L, the wavelength .lamda..sub.H, the wavelength .lamda..sub.S, and the wavelengths .lamda..sub.1, .lamda..sub.2, .lamda..sub.3, . . . , .lamda..sub.n (where n is a natural number) are satisfied. .lamda..sub.L<.lamda..sub.S<.lamda..sub.H (1) .lamda..sub.L<.lamda..sub.1<.lamda..sub.H (2-1) .cndot. .cndot. .cndot. .lamda..sub.L<.lamda..sub.n<.lamda..sub.H (2-n)

2006-04-25

309

Intra-arterial device infections  

Microsoft Academic Search

As an increasing number and variety of prosthetic devices are used in cardiovascular medicine, novel infectious complications\\u000a have been described. Infection of intra-arterial devices, including arterial closure devices, prosthetic carotid patches,\\u000a coronary artery stents and endovascular stents, and stent-grafts, is now being reported. Prosthetic vascular graft infection\\u000a is an older, more common, and better-characterized entity, but recent developments in the

Vera S. Antonios; Larry M. Baddour

2004-01-01

310

Safe-haven locking device  

DOEpatents

Disclosed is a locking device for eliminating external control of a secured space formed by fixed and movable barriers. The locking device uses externally and internally controlled locksets and a movable strike, operable from the secured side of the movable barrier, to selectively engage either lockset. A disengagement device, for preventing forces from being applied to the lock bolts is also disclosed. In this manner, a secured space can be controlled from the secured side as a safe-haven. 4 figures.

Williams, J.V.

1984-04-26

311

CDC field mapping device - ''ROTOTRACK''  

SciTech Connect

A field mapping device for the magnet of the Collider Detector at Fermilab (CDF) was constructed. The device was used for extensive study of the CDF magnetic field distribution. The mechanical and electrical features of the device, as well as the data acquisition system and software, are described. The mechanical system was designed so that the errors on the position and angle of the probe were +-0.75 mm and +-1 mrad, respectively.

Yamada, R.; Hawtree, J.; Kaczar, K.; Leverence, R.; McGuire, K.; Newman-Holmes, C.; Schmidt, E.E.; Shallenberger, J.

1985-10-01

312

Touch-sensing input devices  

Microsoft Academic Search

We can touch things, and our senses tell us when our hands aretouching something. But most computer input devices cannot detectwhen the user touches or releases the device or some portion of thedevice. Thus, adding touch sensors to input devices offers manypossibilities for novel interaction techniques. We demonstrate theTouchTrackball and the Scrolling TouchMouse, which use unobtrusivecapacitance sensors to detect contact

Ken Hinckley; Mike Sinclair

1999-01-01

313

Solid State Devices: Course Materials  

NSDL National Science Digital Library

This course provided by eSyst describes solid state devices. An introduction explains the traditional view and systems view of this topic. The course includes numerous instructor presentations and student guides. Topics for these include power amplifier class comparison, device pathology, and the role of devices. A detailed course outline, student learning outcomes, and links to additional online resources are also provided. Users must create a free, quick login in order to download the materials.

2012-06-27

314

Optical guided-wave devices  

Microsoft Academic Search

Optical fiber is rapidly becoming the transmission medium of choice for new telecommunication systems. For a true lightwave network to evolve, however, optical control devices such as optical switches and multiplexer-demultiplexers will be essential. Optical guided-wave devices built with photolithographic fabrication techniques and electro-optic substrates are compact, low drive power devices that provide these functions. Research is particularly advanced on

R. C. Alferness

1986-01-01

315

Fluctuations in nanoscale magnetoelectronics devices  

NASA Astrophysics Data System (ADS)

We analyze the quantum and thermal fluctuations in a magnetic nanoparticle that can be used as a component in magnetoelectronic devices and compare their influences on the basic modes of device operation at the nanoscale level. Within the framework of the effective Landau free energy constructed using a spin density functional approximation, we study the interplay between quantum and thermal fluctuations in different quantum numbers as the temperature and dimension of the particle are varied. Both theoretical and simulation results are presented for quantifying the quantum and thermal fluctuations. While quantum fluctuations hamper further miniaturization of today's electronic devices, our results suggest that the dominant factors affecting magnetoelectronic nanoscale devices are thermal fluctuations.

Fan, Yabin; Ovchinnikov, Igor V.; Jiang, Wanjun; Schwartz, Robert N.; Wang, Kang L.

2012-11-01

316

AGENDA HEMATOLOGY AND PATHOLOGY DEVICES ...  

Center for Biologics Evaluation and Research (CBER)

Text VersionPage 1. AGENDA HEMATOLOGY AND PATHOLOGY DEVICES PANEL MEETING Hilton Washington DC North, Gaithersburg, MD ... More results from www.fda.gov/downloads/advisorycommittees/committeesmeetingmaterials

317

Microbiopsy/precision cutting devices  

DOEpatents

Devices are disclosed for performing tissue biopsy on a small scale (microbiopsy). By reducing the size of the biopsy tool and removing only a small amount of tissue or other material in a minimally invasive manner, the risks, costs, injury and patient discomfort associated with traditional biopsy procedures can be reduced. By using micromachining and precision machining capabilities, it is possible to fabricate small biopsy/cutting devices from silicon. These devices can be used in one of four ways (1) intravascularly, (2) extravascularly, (3) by vessel puncture, and (4) externally. Additionally, the devices may be used in precision surgical cutting. 6 figs.

Krulevitch, P.A.; Lee, A.P.; Northrup, M.A.; Benett, W.J.

1999-07-27

318

Intravesical migration of intrauterine device.  

PubMed

Intrauterine devices have been plagued by many early and late complications, including uterine perforation and migration into adjacent structures. To our knowledge only 18 cases have been reported in the literature of migration of an intrauterine device into the bladder. We report on a 38-year-old woman in whom an intrauterine device eroded from the uterus 3 years after placement. The device remained asymptomatic in the pelvis for an additional 13 years before the patient presented with urinary symptoms. The literature is reviewed. PMID:1729505

Dietrick, D D; Issa, M M; Kabalin, J N; Bassett, J B

1992-01-01

319

Microbiopsy/precision cutting devices  

DOEpatents

Devices for performing tissue biopsy on a small scale (microbiopsy). By reducing the size of the biopsy tool and removing only a small amount of tissue or other material in a minimally invasive manner, the risks, costs, injury and patient discomfort associated with traditional biopsy procedures can be reduced. By using micromachining and precision machining capabilities, it is possible to fabricate small biopsy/cutting devices from silicon. These devices can be used in one of four ways 1) intravascularly, 2) extravascularly, 3) by vessel puncture, and 4) externally. Additionally, the devices may be used in precision surgical cutting.

Krulevitch, Peter A. (Pleasanton, CA); Lee, Abraham P. (Walnut Creek, CA); Northrup, M. Allen (Berkeley, CA); Benett, William J. (Livermore, CA)

1999-01-01

320

Temperature differential detection device  

DOEpatents

A temperature differential detection device for detecting the temperature differential between predetermined portions of a container wall is disclosed as comprising a Wheatstone bridge circuit for detecting resistance imbalance with a first circuit branch having a first elongated wire element mounted in thermal contact with a predetermined portion of the container wall, a second circuit branch having a second elongated wire element mounted in thermal contact with a second predetermined portion of a container wall with the wire elements having a predetermined temperature-resistant coefficient, an indicator interconnected between the first and second branches remote from the container wall for detecting and indicating resistance imbalance between the first and second wire elements, and connector leads for electrically connecting the wire elements to the remote indicator in order to maintain the respective resistance value relationship between the first and second wire elements. The indicator is calibrated to indicate the detected resistance imbalance in terms of a temperature differential between the first and second wall portions.

Girling, Peter M. (Allentown, PA)

1986-01-01

321

Temperature differential detection device  

DOEpatents

A temperature differential detection device for detecting the temperature differential between predetermined portions of a container wall is disclosed as comprising a Wheatstone bridge circuit for detecting resistance imbalance with a first circuit branch having a first elongated wire element mounted in thermal contact with a predetermined portion of the container wall, a second circuit branch having a second elongated wire element mounted in thermal contact with a second predetermined portion of a container wall with the wire elements having a predetermined temperature-resistant coefficient, an indicator interconnected between the first and second branches remote from the container wall for detecting and indicating resistance imbalance between the first and second wire elements, and connector leads for electrically connecting the wire elements to the remote indicator in order to maintain the respective resistance value relationship between the first and second wire elements. The indicator is calibrated to indicate the detected resistance imbalance in terms of a temperature differential between the first and second wall portions. 2 figs.

Girling, P.M.

1986-04-22

322

Ocean wave energy device  

SciTech Connect

This patent describes an ocean wave energy device of a type including a buoy which reciprocates in a substantially vertical direction in response to successive waves of variable frequency passing therebeneath, the buoy being supported upon a substantially vertically oriented shaft and a power take off means including a shaft driven by movement of the vertical shaft. The improvement described consists of: wave frequency detector means for detecting the instantaneous frequency of a wave passing the detector and which will thereafter pass the buoy by monitoring the contour of each wave as such wave passes such wave frequency detector means and measuring the time interval between the crest and the following trough and between the trough and following crest of each such wave and means for imposing an artificial resonance to the buoy whereby the buoy resonance may be substantially conformed to the frequency of the wave at the time at the buoy, the artificial resonance imposing means including brake means for halting vertical movement of the buoy at substantially the uppermost and substantially the lowermost limits of vertical travel of the buoy.

LaStella, J.P.; Tornabene, M.G.

1986-07-15

323

Assessing the intrauterine device.  

PubMed

The data that have accumulated in the 15 years of use of the IUD are examined, the problems involved in attempting to derive meaningful data are discussed and important research directions are highlighted in an attempt to assess the IUD as a contraceptive measure in light of negative reports appearing in the news media. Reliable epidemiologic information about IUD experience before 1970 are available in the reports of the Cooperative Statistical Program. Currently available IUD designs include the Lippes loop, copper-7, double coil, copper T and progesterone T. It has been observed that several factors may be responsible for the variation in performance of IUDs. These include: patient population, physician experience, side effect tolerance, clinic attitude and additional contraceptives (whether a patient is encouraged to use additional contraception with the IUD). The only valid method of comparison of different IUDs is to perform randomized insertion of the devices in the same clinic using the same personnel and the same time period and to analyze the methods by life table analysis. Medical problems in IUD use were discussed including bleeding (either heavy and/or prolonged menses or intermenstrual bleeding), perforation, pregnancy with an IUD in situ, and infection. The contraceptive action of the IUD is associated with the production of a local sterile inflammatory reaction caused by the presence of the foreign body in the uterus. Research should be directed toward improving the design of IUD inserters because placement of the IUD within the uterine cavity is of extreme importance for IUD effectiveness. PMID:1140345

Mishell, D R

324

ITER tokamak device  

NASA Astrophysics Data System (ADS)

The results of the Conceptual Design Activities for the International Thermonuclear Experimental Reactor (ITER) are summarized. These activities, carried out between April 1988 and December 1990, produced a consistent set of technical characteristics and preliminary plans for co-ordinated research and development support of ITER, a conceptual design, a description of design requirements and a preliminary construction schedule and cost estimate. After a description of the design basis, an overview is given of the tokamak device, its auxiliary systems, facility and maintenance. The interrelation and integration of the various subsystems that form the ITER tokamak concept are discussed. The 16 ITER equatorial port allocations, used for nuclear testing, diagnostics, fueling, maintenance, and heating and current drive, are given, as well as a layout of the reactor building. Finally, brief descriptions are given of the major ITER sub-systems, i.e., (1) magnet systems (toroidal and poloidal field coils and cryogenic systems), (2) containment structures (vacuum and cryostat vessels, machine gravity supports, attaching locks, passive loops and active coils), (3) first wall, (4) divertor plate (design and materials, performance and lifetime, a.o.), (5) blanket/shield system, (6) maintenance equipment, (7) current drive and heating, (8) fuel cycle system, and (9) diagnostics.

Doggett, J.; Salpietro, E.; Shatalov, G.

1991-07-01

325

Device for improved combustion  

SciTech Connect

A device for improved combustion is described comprising: a tubular housing member having a first end and a second end, the first and second ends each having a circular opening therethrough; a combustion chamber disposed about the second end of the-tubular-housing member; a first conduit member extending from the first end of the tubular housing member and in fluid communication with the circular opening in the first end of the tubular housing member so as to allow the passage of air therethrough; a second conduit member axially disposed within the first conduit member and extending through the first conduit member and through the tubular housing member to the circular opening the second end of the tubular housing member so as to allow the passage of fuel therethrough; means for effecting turbulence in the air passing through the tubular housing member; means for effecting turbulence in the fuel passing through the second conduit member; means for intermixing and emitting the turbulent air and the fuel in a mushroom shaped configuration with the turbulent air surrounding the mushroom shaped configuration so as to substantially eliminate noxious waste gases as by-product of combustion of the air and fuel mixture.

Polomchak, R.W.; Yacko, M.

1988-03-08

326

Cable load sensing device  

SciTech Connect

Apparatus for sensing the magnitude of a load on a cable as the cable is employed to support the load includes a beam structure clamped to the cable so that a length of the cable lies along the beam structure. A spacer associated with the beam structure forces a slight curvature in a portion of the length of cable under a cable "no-load" condition so that the portion of the length of cable is spaced from the beam structure to define a cable curved portion. A strain gauge circuit including strain gauges is secured to the beam structure by welding. As the cable is employed to support a load the load causes the cable curved portion to exert a force normal to the cable through the spacer and on the beam structure to deform the beam structure as the cable curved portion attempts to straighten under the load. As this deformation takes place, the resistance of the strain gauges is set to a value proportional to the magnitude of the normal strain on the beam structure during such deformation. The magnitude of the normal strain is manipulated in a control device to generate a value equal to the magnitude or weight of the load supported by the cable.

Beus, Michael J. (Spokane, WA); McCoy, William G. (Spokane, WA)

1998-01-01

327

Thyristor-Type Memory Device.  

National Technical Information Service (NTIS)

A thyristor device can be used to implement a variety of semiconductor memory circuits, including high-density memory-cell arrays and single cell circuits. In one example embodiment, the thyristor device includes doped regions of opposite polarity, and a ...

F. Nemati J. D. Plummer

2005-01-01

328

The Museum of Unworkable Devices  

NSDL National Science Digital Library

This site includes a collection of diagrams and pictures of devices, many patented, whose intended operations violate the laws of physics. The site focuses mostly on perpetual motion machines, but also has pages on simply impractical devices or artistic impossibilities. The site is also available in Portugese.

Simanek, Donald

2004-12-15

329

Pleated Membrane Intrauterine Contraceptive Device.  

National Technical Information Service (NTIS)

The patent application relates to an intrauterine contraceptive device which will fold-up for insertion and deploy into the desired shape after it is introduced into the uterus. The device, adapted to be non-surgically placed into the uterus to protect ag...

R. G. Wheeler

1974-01-01

330

Indexing Aids, Procedures and Devices.  

National Technical Information Service (NTIS)

The purpose of this study was to analyze proposed and available techniques and devices designed as aids to the manual indexing operation in order to identify those manual and semi-automatic techniques and devices which increase the speed, accuracy, and co...

A. L. Korotkin L. H. Oliver D. R. Burgis

1965-01-01

331

Mobile Agents in Wireless Devices  

Microsoft Academic Search

The networks that connect handheld wireless devices such as cell phones and PDAs suffer from low bandwidth and a high incidence of network errors. By employing mobile agents, such devices could provide a reliable technology for message transport over wireless links. Mobile agents are inherently distributed software entities that reduce the load on the network when they move. Mobile agents

Luminita Vasiu; Qusay H. Mahmoud

2004-01-01

332

Thermal coring method and device  

Microsoft Academic Search

A thermal drilling device for isolating and recovering an elongated core segment from within the earth's crust is described. The device includes a pair of concentric, tubular members that define an annular fluid path for directing molten lava against the earth's crust for thermal erosion. Heat-generating means are included along the fluid path to raise the temperature of the molten

1969-01-01

333

Body Implanted Medical Device Communications  

Microsoft Academic Search

The medical care day by day and more and more is associated with and reliant upon concepts and advances of electronics and electromagnetics. Numerous medical devices are implanted in the body for medical use. Tissue implanted devices are of great interest for wireless medical applications due to the promising of different clinical usage to promote a patient independence. It can

Kamya Yekeh Yazdandoost; Ryuji Kohno

2009-01-01

334

Pipe weld crown removal device  

Microsoft Academic Search

A device is provided for grinding down the crown of a pipe weld joining aligned pipe sections so that the weld is substantially flush with the pipe sections joined by the weld. The device includes a cage assembly comprising a pair of spaced cage rings adapted to be mounted for rotation on the respective pipe sections on opposite sides of

C. K. Sword; P. J. Sette

1992-01-01

335

Pipe weld crown removal device  

Microsoft Academic Search

This invention is comprised of a device that provides for grinding down the crown of a pipe weld joining aligned pipe sections so that the weld is substantially flush with the pipe sections joined by the weld. The device includes a cage assembly comprising a pair of spaced cage rings adapted to be mounted for rotation on the respective pipe

C. K. Sword; P. J. Sette

1991-01-01

336

Ventricular assist devices in pediatrics  

PubMed Central

The implantation of a mechanical circulatory device for end-stage ventricular failure is a possible therapeutic approach in adult and pediatric cardiac surgery and cardiology. The aim of this article is to present mechanical circulatory assist devices used in infants and children with special emphasis on extracorporeal membrane oxygenation, Berlin Heart assist device, centrifugal pump and Medos assist device. The success of long-term support with implantable ventricular assist devices in adults and children has led to their increasing use as a bridge to transplantation in patients with otherwise non-treatable left ventricular failure, by transforming a terminal phase heart condition into a treatable cardiopathy. Such therapy allows rehabilitation of patients before elective cardiac transplantation (by removing contraindications to transplantation mainly represented by organ impairment) or acting as a bridge to recovery of the native left ventricular function (depending on underlying cardiac disease). Treatment may also involve permanent device implantation when cardiac transplantation is contraindicated. Indications for the implantation of assisted circulation include all states of cardiac failure that are reversible within a variable period of time or that require heart transplantation. This article will address the current status of ventricular assist devices by examining historical aspects of its development, current technical issues and clinical features of pediatric ventricular assist devices, including indications and contraindications for support.

Fuchs, A; Netz, H

2001-01-01

337

Antimonide-Based Optical Devices.  

National Technical Information Service (NTIS)

An optical device includes an antimonide-containing substrate, and an antimonide-containing n-doped layer provided on the substrate. The optical device further includes an antimonide-containing i-doped layer provided on the n-doped layer, an antimonide-co...

D. W. Prather S. Lohokare

2005-01-01

338

Assessment of Lift Augmentation Devices.  

National Technical Information Service (NTIS)

Contents: Aerodynamics of mechanical high-lift devices; Aerodynamics of pneumatic high-lift devices; Aerodynamics of variable sweep; Fundamental aspects of flow separation under high-lift conditions; Some notes on two-dimensional high-lift tests in wind-t...

1971-01-01

339

Volume Visualization on Mobile Devices  

Microsoft Academic Search

With the advent of high-bandwidth wireless networks and pervasive computing, the space and platform barriers for visualization are being broken. Mobile visualization, or ubiquitous visualization, allows users to visualize data anywhere, anytime, on various mobile devices connected by wireless networks. In this paper, we investigate how to achieve volume visualization on mobile devices. We present a client-obliviousdata model for various

Hong Zhou; Huamin Qu; Yingcai Wu; Ming-Yuen Chan

340

Insertion device vacuum system designs  

SciTech Connect

Synchrotron light source insertion device vacuum systems now in operation and systems proposed for the future are reviewed. An overview of insertion devices is given and four generic vacuum chamber designs, transition section design and pumping considerations are discussed. Examples of vacuum chamber systems are presented.

Hoyer, E.

1988-05-01

341

Failure prediction of semiconductor devices  

Microsoft Academic Search

The basic principles of the reliability and quality control of semiconductor devices are discussed. Relationships between LF flicker noise and crystal-defect-associated failure in semiconductors are examined. It is shown that LF noise analysis can be used for the nondestructive evaluation of semiconductor devices. Techniques and applications of LF noise analysis are examined.

V. S. Prianikov

1978-01-01

342

Lectures for Mobile Devices, Evaluating \\  

Microsoft Academic Search

This paper explores the use of recorded lectures in formats for mobile devices (Video iPod and PDA) in a graduate computer science program using a software system developed at this university. Recordings are converted to formats for mobile devices along with an interface that allows students to subscribe to a course to receive automatic lecture downloads. The technology, pedagogy, student

Kenneth Hoganson; David Lebron

2007-01-01

343

Modern high power semiconductor devices  

NASA Astrophysics Data System (ADS)

Today, power semiconductor devices enable sustaining several kilovolts and kiloamperes. New structures are constantly being developed for almost every particular device type. However, below the advanced technological concepts, proper design still relies on a few simple rules that result from physical operating principles and limits of semiconductor structures.

Napieralski, Andrzej; Napieralska, Ma?gorzata; Starzak, ?ukasz; Zubert, Mariusz

2013-07-01

344

Self-powered nanowire devices  

Microsoft Academic Search

The harvesting of mechanical energy from ambient sources could power electrical devices without the need for batteries. However, although the efficiency and durability of harvesting materials such as piezoelectric nanowires have steadily improved, the voltage and power produced by a single nanowire are insufficient for real devices. The integration of large numbers of nanowire energy harvesters into a single power

Sheng Xu; Yong Qin; Chen Xu; Yaguang Wei; Rusen Yang; Zhong Lin Wang

2010-01-01

345

SODA: Service Oriented Device Architecture  

Microsoft Academic Search

We now see an increasing need and opportunity to create interfaces between the physical world of sensors and actuators and the software world of enterprise systems. To eliminate much of the complexity and cost associated with integrating devices into highly distributed enterprise systems, we propose leveraging existing and emerging standards from both the embedded-device and IT domains within a service-oriented

Scott De Deugd; Randy Carroll; Kevin Kelly; Bill Millett; Jeffrey Ricker

2006-01-01

346

Device for Recording gamma Topograms.  

National Technical Information Service (NTIS)

A device is proposed for recording gamma topograms which contains a scintillation pickup, a linear amplifier, a single-channel amplitude analyzer, a counting-speed meter, a system of control of the scintillation pickup, and a recording device, the disting...

E. Y. Elkind V. L. Krivoshein

1965-01-01

347

Nano Sensing Devices - Future Directions  

NASA Astrophysics Data System (ADS)

Nanotechnology offers tremendous opportunities for developing sensing and monitoring devices that are small and inexpensive with rapid response time of multiple analyte detection. In addition, there is the potential for these sensors to have "smart" or active capabilities embedded in them. These devices can help meet critical challenges identified in the environmental, occupational, biological and national security areas.

Savage, Nora

348

Micromachined devices for interfacing neurons  

NASA Astrophysics Data System (ADS)

Micromachining technologies were established to fabricate microelectrode arrays and devices for interfacing parts of the central or peripheral nervous system. The devices were part of a neural prosthesis that allows simultaneous multichannel recording and multisite stimulation of neurons. Overcoming the brittle mechanics of silicon devices and challenging housing demands close to the nerve we established a process technology to fabricate light-weighted and highly flexible polyimide based devices. Platinum and iridium thin-film electrodes were embedded in the polyimide. With reactive ion etching we got the possibility to simply integrate interconnections and to form nearly arbitrary outer shapes of the devices. We designed multichannel devices with up to 24 electrodes in the shape of plates, hooks and cuffs for different applications. In vitro tests exhibited stable electrode properties and no cytotoxicity of the materials and the devices. Sieve electrodes were chronically implanted in rats to interface the regenerating sciatic nerve. After six months, recordings and stimulation of the nerve via electrodes on the micro-device proved functional reinnervation of the limb. Concentric circular structures were designed for a retina implant for the blind. In preliminary studies in rabbits, evoked potentials in the visual cortex corresponded to stimulation sites of the implant.

Stieglitz, Thomas; Beutel, Hansjoerg; Blau, Cornelia; Meyer, Joerg-Uwe

1998-07-01

349

Automatic Mechetronic Wheel Light Device  

SciTech Connect

A wheel lighting device for illuminating a wheel of a vehicle to increase safety and enhance aesthetics. The device produces the appearance of a "ring of light" on a vehicle's wheels as the vehicle moves. The "ring of light" can automatically change in color and/or brightness according to a vehicle's speed, acceleration, jerk, selection of transmission gears, and/or engine speed. The device provides auxiliary indicator lights by producing light in conjunction with a vehicle's turn signals, hazard lights, alarm systems, and etc. The device comprises a combination of mechanical and electronic components and can be placed on the outer or inner surface of a wheel or made integral to a wheel or wheel cover. The device can be configured for all vehicle types, and is electrically powered by a vehicle's electrical system and/or battery.

Khan, Mohammed John Fitzgerald (Silver Spring, MD)

2004-09-14

350

III-Nitride UV Devices  

NASA Astrophysics Data System (ADS)

The need for efficient, compact and robust solid-state UV optical sources and sensors had stimulated the development of optical devices based on III-nitride material system. Rapid progress in material growth, device fabrication and packaging enabled demonstration of high efficiency visible-blind and solar-blind photodetectors, deep-UV light-emitting diodes with emission from 400 to 250 nm, and UV laser diodes with operation wavelengths ranging from 340 to 350 nm. Applications of these UV optical devices include flame sensing; fluorescence-based biochemical sensing; covert communications; air, water and food purification and disinfection; and biomedical instrumentation. This paper provides a review of recent advances in the development of UV optical devices. Performance of state-of-the-art devices as well as future prospects and challenges are discussed.

Asif Khan, M.; Shatalov, M.; Maruska, H. P.; Wang, H. M.; Kuokstis, E.

2005-10-01

351

Parachute device with improved handle  

US Patent & Trademark Office Database

A parachute-type amusement device including an outer section extending around at least a portion of the device to provide a hand graspable handle, and an inner section having a sheet of flexible material capable of billowing with air upon manipulation of the device. The handle permits easy folding of the device for compact storage, e.g., in a bag or pouch. In one embodiment, the outer section has multiple handle members, such as foam inserts. In another embodiment, there is a single flexible handle member, such as a rope, cord, braid, and/or a tubular foam insert. The handle members may be spaced from one another within the outer section to facilitate grasping and/or folding of the device. The sheet may be circular, rectangular, etc., and may be visually divided into a multiple discrete segments, e.g. by coloration. A discrete number of foam inserts may be positioned within each of segment.

2005-03-15

352

Photo-designed terahertz devices  

PubMed Central

Technologies are being developed to manipulate electromagnetic waves using artificially structured materials such as photonic crystals and metamaterials, with the goal of creating primary optical devices. For example, artificial metallic periodic structures show potential for the construction of devices operating in the terahertz frequency regime. Here we demonstrate the fabrication of photo-designed terahertz devices that enable the real-time, wide-range frequency modulation of terahertz electromagnetic waves. These devices are comprised of a photo-induced, planar periodic-conductive structure formed by the irradiation of a silicon surface using a spatially modulated, femtosecond optical pulsed laser. We also show that the modulation frequency can be tuned by the structural periodicity, but is hardly affected by the excitation power of the optical pump pulse. We expect that our findings will pave the way for the construction of all-optical compact operating devices, such as optical integrated circuits, thereby eliminating the need for materials fabrication processes.

Okada, Takanori; Tanaka, Koichiro

2011-01-01

353

Handheld ultrasound array imaging device  

NASA Astrophysics Data System (ADS)

A handheld ultrasound imaging device, one that weighs less than five pounds, has been developed for diagnosing trauma in the combat battlefield as well as a variety of commercial mobile diagnostic applications. This handheld device consists of four component ASICs, each is designed using the state of the art microelectronics technologies. These ASICs are integrated with a convex array transducer to allow high quality imaging of soft tissues and blood flow in real time. The device is designed to be battery driven or ac powered with built-in image storage and cineloop playback capability. Design methodologies of a handheld device are fundamentally different to those of a cart-based system. As system architecture, signal and image processing algorithm as well as image control circuit and software in this device is deigned suitably for large-scale integration, the image performance of this device is designed to be adequate to the intent applications. To elongate the battery life, low power design rules and power management circuits are incorporated in the design of each component ASIC. The performance of the prototype device is currently being evaluated for various applications such as a primary image screening tool, fetal imaging in Obstetrics, foreign object detection and wound assessment for emergency care, etc.

Hwang, Juin-Jet; Quistgaard, Jens

1999-06-01

354

Current devices of respiratory physiotherapy  

PubMed Central

In recent years patients with respiratory diseases use various devices, which help the removal of mucus from the airways and the improvement of pulmonary function. The aim of the present study is to determine the effectiveness of the current devices of respiratory physiotherapy, as it comes from the review of literature. The current devices of physiotherapy for patients with respiratory diseases, are presented as an alternative therapy method or a supplemental therapy and they can motivate patients to apply therapy by themselves. These devices seem to increase patients' compliance to daily treatment, because they present many benefits, as independent application, full control of therapy and easy use. These devices are the Positive Expiratory Pressure, the High Frequency Chest Wall Oscillation, the Oral High Frequency Oscillation, the Intrapulmonary Percussive Ventilation, the Incentive Spirometry the Flutter and the Acapella and the Cornet. Current devices seem to be effective in terms of mucus expectoration and pulmonary function improvement, as it is shown by published studies. The choice of the suitable device for each patient is a challenge for the physiotherapist in order to achieve better compliance in daily treatment. More controlled studies are needed due to the fact that the number of published studies is limited.

Hristara-Papadopoulou, A; Tsanakas, J; Diomou, G; Papadopoulou, O

2008-01-01

355

Biomedical devices and systems security.  

PubMed

Medical devices have been changing in revolutionary ways in recent years. One is in their form-factor. Increasing miniaturization of medical devices has made them wearable, light-weight, and ubiquitous; they are available for continuous care and not restricted to clinical settings. Further, devices are increasingly becoming connected to external entities through both wired and wireless channels. These two developments have tremendous potential to make healthcare accessible to everyone and reduce costs. However, they also provide increased opportunity for technology savvy criminals to exploit them for fun and profit. Consequently, it is essential to consider medical device security issues. In this paper, we focused on the challenges involved in securing networked medical devices. We provide an overview of a generic networked medical device system model, a comprehensive attack and adversary model, and describe some of the challenges present in building security solutions to manage the attacks. Finally, we provide an overview of two areas of research that we believe will be crucial for making medical device system security solutions more viable in the long run: forensic data logging, and building security assurance cases. PMID:22254819

Arney, David; Venkatasubramanian, Krishna K; Sokolsky, Oleg; Lee, Insup

2011-01-01

356

Biocompatibility of implantable biomedical devices  

NASA Astrophysics Data System (ADS)

Biomedical devices have been broadly used to treat human disease, especially chronic diseases where pharmaceuticals are less effective. Heart valve and artificial joint are examples. Biomedical devices perform by delivering therapies such as electric stimulations, mechanical supports and biological actions. While the uses of biomedical devices are highly successful they can trigger adverse biological reactions as well. The property that medical devices perform with intended functions but not causing unacceptable adverse effects was called biocompatibility in the early time. As our understanding of biomaterial-biological interactions getting broader, biocompatibility has more meanings. In this talk, I will present some adverse biological reactions observed with implantable biomedical devices. Among them are surface fouling of implantable sensors, calcification with vascular devices, restenosis with stents, foreign particle migration and mechanical fractures of devices due to inflammation reactions. While these effects are repeatable, there are very few quantitative data and theories to define them. The purpose of this presentation is to introduce this biocompatibility concept to biophysicists to stimulate research interests at different angles. An open question is how to quantitatively understand the biocompatibility that, like many other biological processes, has not been quantified experimentally.

Lyu, Suping

2008-03-01

357

Optimization of Micromachined Photon Devices  

SciTech Connect

The Oak Ridge National Laboratory has been instrumental in developing ultraprecision technologies for the fabrication of optical devices. We are currently extending our ultraprecision capabilities to the design, fabrication, and testing of micro-optics and MEMS devices. Techniques have been developed in our lab for fabricating micro-devices using single point diamond turning and ion milling. The devices we fabricated can be used in micro-scale interferometry, micro-positioners, micro-mirrors, and chemical sensors. In this paper, we focus on the optimization of microstructure performance using finite element analysis and the experimental validation of those results. We also discuss the fabrication of such structures and the optical testing of the devices. The performance is simulated using finite element analysis to optimize geometric and material parameters. The parameters we studied include bimaterial coating thickness effects; device length, width, and thickness effects, as well as changes in the geometry itself. This optimization results in increased sensitivity of these structures to absorbed incoming energy, which is important for photon detection or micro-mirror actuation. We have investigated and tested multiple geometries. The devices were fabricated using focused ion beam milling, and their response was measured using a chopped photon source and laser triangulation techniques. Our results are presented and discussed.

Datskos, P.G.; Datskou, I.; Evans, B.M., III; Rajic, S.

1999-07-18

358

Current devices of respiratory physiotherapy.  

PubMed

In recent years patients with respiratory diseases use various devices, which help the removal of mucus from the airways and the improvement of pulmonary function. The aim of the present study is to determine the effectiveness of the current devices of respiratory physiotherapy, as it comes from the review of literature. The current devices of physiotherapy for patients with respiratory diseases, are presented as an alternative therapy method or a supplemental therapy and they can motivate patients to apply therapy by themselves. These devices seem to increase patients' compliance to daily treatment, because they present many benefits, as independent application, full control of therapy and easy use. These devices are the Positive Expiratory Pressure, the High Frequency Chest Wall Oscillation, the Oral High Frequency Oscillation, the Intrapulmonary Percussive Ventilation, the Incentive Spirometry the Flutter and the Acapella and the Cornet. Current devices seem to be effective in terms of mucus expectoration and pulmonary function improvement, as it is shown by published studies. The choice of the suitable device for each patient is a challenge for the physiotherapist in order to achieve better compliance in daily treatment. More controlled studies are needed due to the fact that the number of published studies is limited. PMID:19158964

Hristara-Papadopoulou, A; Tsanakas, J; Diomou, G; Papadopoulou, O

2008-01-01

359

Optimization of micromachined photon devices  

NASA Astrophysics Data System (ADS)

The Oak Ridge National Laboratory has been instrumental in developing ultraprecision technologies for the fabrication of optical devices. We are currently extending our ultraprecision capabilities to the design, fabrication, and testing of micro-optics and MEMS devices. Techniques have been developed in our lab for fabricating micro-devices using single point diamond turning and ion milling. The devices we fabricated can be used in micro-scale interferometry, micro-positioners, micro-mirrors, and chemical sensors. In this paper, we focus on the optimization of microstructure performance using finite element analysis and the experimental validation of those results. We also discuss the fabrication of such structures and the optical testing of the devices. The performance is simulated using finite element analysis to optimize geometric and material parameters. The parameters we studied include bimaterial coating thickness effects; device length, width, and thickness effects, as well as changes in the geometry itself. This optimization results in increased sensitivity of these structures to absorbed incoming energy, which is important for photon detection or micro-mirror actuation. We have investigated and tested multiple geometries. the devices were fabricated using focused ion beam milling, and their response was measured using a chopped photon source and laser triangulation techniques. Our results are presented and discussed.

Evans, Boyd M.; Datskos, Panos G.; Rajic, Slobodan; Datskou, Irene

1999-09-01

360

Integrality and Separability of Input Devices  

Microsoft Academic Search

Current input device taxonomies and other frameworks typically emphasize the mechanical structure of input devices. We suggest that selecting an appropriate input device for an interactive task requires looking beyond the physical structure of devices to the deeper perceptual structure of the task, the device, and the interrelationship between the perceptual structure of the task and the control properties of

Robert J. K. Jacob; Linda E. Sibert; Daniel C. Mcfarlane; M. Preston Mullen Jr.

1994-01-01

361

Biomedical Devices based on Semiconductor Microelectronics Technologies  

NASA Astrophysics Data System (ADS)

Recent development of biomedical devices based on microelectronics technologies are reviewed. Implantable biomedical devices are focused and discussed in detail. Two typical devices are demonstrated; one is for retinal prosthesis and the other is a deep brain implantable device. Future issues for implantable biomedical devices are addressed.

Ohta, Jun; Kobayashi, Takuma; Noda, Toshihiko; Sasagawa, Kiyotaka; Tokuda, Takashi

362

Evaluation of Handheld Devices for Mobile Learning  

Microsoft Academic Search

Many educational organizations start using handheld devices for learning. The aim of this paper is to identify the current status of handheld devices and their appropriateness for mobile learning. First, it presents handheld devices requirements for mobile learning. Then it presents a framework for evaluating handheld devices in relation to mobile learning. It evaluates current handheld devices using the evaluation

Anastasios A. Economides; Nick Nikolaou

363

Green's function theory for predicting device-to-device variability  

NASA Astrophysics Data System (ADS)

Due to random dopant fluctuations, the device-to-device variability is a serious challenge to emerging nanoelectronics. In this work we present theoretical formalisms and numerical simulations of quantum-transport variability, based on the Green's function technique and the multiple-scattering theory. We have developed a general formalism using the diagrammatic technique within the coherent-potential approximation that can be applied to a wide range of disorder concentrations. In addition, we have developed a method by using a perturbative expansion within the low-concentration approximation that is extremely useful for typical nanoelectronic devices having low dopant concentration. Applying both formalisms, transport fluctuations due to random impurities can be predicted without lengthy brute force computation of ensembles of device structures. Numerical implementations of the formalisms are demonstrated using both tight-binding models and first-principles models.

Zhu, Yu; Liu, Lei; Guo, Hong

2013-08-01

364

Device modeling and simulations toward sub-10 nm semiconductor devices  

Microsoft Academic Search

This paper overviews the fundamental problems encountered in device modeling and simulations of sub-10 nm Si metal-oxide-semiconductor field-effect-transistors (MOSFETs). We focus on the two fundamental problems: the quantum effects and the effects associated with the long-range Coulomb potential. It is pointed out that these problems are profoundly related to the basic principles of device physics and even pose a question

Nobuyuki Sano; Akira Hiroki; Kazuya Matsuzawa

2002-01-01

365

Medical Devices Policy and the Humanities: Examining Implantable Cardiac Devices  

Microsoft Academic Search

Medical devices are ubiquitous: eyeglasses and intraocular lenses enhance vision; artificial limbs restore mobility; and implanted\\u000a pacemakers and defibrillators treat otherwise debilitating or fatal heart rhythms. Despite the critically important role of\\u000a medical devices in health care, their development, testing, and use raise significant practical and normative issues.\\u000a \\u000a For the most part addressing these issues in the context of medical

Jeremy Sugarman; Courtney S. Campbell; Paul Citron; Susan Bartlett Foote; Nancy M. P. King

366

Well logging device and method  

SciTech Connect

A method is described of measuring the movement of fluid in a wall borehole, comprising the steps of: positioning a downhole device into the borehole by suspending the device from a cable at the well surface. The device is being provided with a signal emitter and two longitudinally spaced signal detectors. Each signal detector is operable to output a readout proportional to the proximity of a signal emitted from the signal emitter; and emitting a signal from the signal emitter and simultaneously sensing the signal with each of the signal detectors.

Hawthorne, M.M.

1987-05-05

367

Split ring containment attachment device  

DOEpatents

A containment attachment device 10 for operatively connecting a glovebag 200 to plastic sheeting 100 covering hazardous material. The device 10 includes an inner split ring member 20 connected on one end 22 to a middle ring member 30 wherein the free end 21 of the split ring member 20 is inserted through a slit 101 in the plastic sheeting 100 to captively engage a generally circular portion of the plastic sheeting 100. A collar potion 41 having an outer ring portion 42 is provided with fastening means 51 for securing the device 10 together wherein the glovebag 200 is operatively connected to the collar portion 41.

Sammel, Alfred G. (Pittsburgh, PA)

1996-01-01

368

Mobile computer device display postures  

US Patent & Trademark Office Database

Embodiments of mobile computer device display postures are described. In embodiments, a first display is integrated in a first housing of a dual-display mobile computer device, and a second display is integrated in a second housing of the dual-display mobile computer device. Position data can be sensed from a binding that movably connects the first housing and the second housing, and a position angle can be determined between the first housing and the second housing that correlates to a display posture of the first display and the second display.

2012-06-05

369

Central nervous system device infections.  

PubMed

Infections of central nervous system (CNS) devices are relatively common and potentially severe. The most common devices associated with infection are ventriculostomy catheters, shunts, and deep brain stimulators. The prevention, diagnosis, and management of these infections require a collaborative approach because of the complexity of surgery, the nuances of antimicrobial delivery in the CNS, and the potential for severe morbidity and mortality. This article focuses on new developments in the management and prevention of intracranial device infections, in particular ventriculostomy-related infections and infections of deep brain stimulators. PMID:22284378

Stenehjem, Edward; Armstrong, Wendy S

2012-03-01

370

75 FR 57968 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2010-N-0001] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory...meeting will be open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices...

2010-09-23

371

76 FR 71983 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2011-N-0002] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory...meeting will be open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices...

2011-11-21

372

77 FR 18829 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2012-N-0001] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory...meeting will be open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices...

2012-03-28

373

76 FR 55398 - Immunology Devices Panel of the Medical Devices Advisory Committee: Notice of Postponement of...  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2011-N-0002] Immunology Devices Panel of the Medical Devices Advisory Committee...Drug Administration (FDA) is postponing the meeting of the Immunology Devices Panel of the Medical Devices Advisory Committee...

2011-09-07

374

75 FR 41986 - Medical Devices; Pediatric Uses of Devices; Requirements for Submission of Information on...  

Federal Register 2010, 2011, 2012, 2013

...FDA-2009-N-0458] RIN 0910-AG29 Medical Devices; Pediatric Uses of Devices...a Disease or Condition That a Device Is Intended to Treat, Diagnose...of readily available pediatric medical device information as a part of...

2010-07-20

375

21 CFR 801.63 - Medical devices; warning statements for devices containing or manufactured with...  

Code of Federal Regulations, 2010 CFR

...SERVICES (CONTINUED) MEDICAL DEVICES LABELING Labeling Requirements for Over-the-Counter Devices § 801.63 Medical devices; warning statements for devices...in the upper atmosphere. CONSULT WITH YOUR PHYSICIAN,...

2009-04-01

376

21 CFR 801.63 - Medical devices; warning statements for devices containing or manufactured with...  

Code of Federal Regulations, 2010 CFR

...SERVICES (CONTINUED) MEDICAL DEVICES LABELING Labeling Requirements for Over-the-Counter Devices § 801.63 Medical devices; warning statements for devices...in the upper atmosphere. CONSULT WITH YOUR PHYSICIAN,...

2010-04-01

377

75 FR 55803 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2010-N-0001] Neurological Devices Panel of the Medical Devices Advisory Committee...meeting will be open to the public. Name of Committee: Neurological Devices Panel of the Medical Devices Advisory...

2010-09-14

378

Medical Devices Dispute Resolution Panel  

Center for Biologics Evaluation and Research (CBER)

... The Medical Devices Dispute Resolution Panel provides advice to the Center Director on complex or contested scientific issues between the FDA ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

379

Gastroenterology-Urology Devices Panel  

Center for Biologics Evaluation and Research (CBER)

... Designated Federal Official (DFO). Avena Russell, ABD, MS 301-796-3805. -. Additional Information. Charter Medical Devices Advisory Committee. - ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

380

Infrared microthermography of microfabricated devices  

SciTech Connect

We report a new experimental apparatus for infrared microthermography applicable to a wide class of samples including semitransparent ones and perforated devices. This setup is particularly well suited for the thermography of microfabricated devices. Traditionally, temperature calibration is performed using calibration hot plates, but this is not applicable to transmissive samples. In this work a custom designed miniature calibration oven in conjunction with spatial filtering is used to obtain accurate static and transient temperature maps of actively heated devices. The procedure does not require prior knowledge of the emissivity. Calibration and image processing algorithms are discussed and analyzed. We show that relatively inexpensive uncooled bolometer arrays can be a suitable detector choice in certain radiometric applications. As an example, we apply this method in the analysis of temperature profiles of an actively heated microfabricated preconcentrator device that incorporates a perforated membrane and is used in trace detection of illicit substances.

Furstenberg, Robert; Kendziora, C. A.; Stepnowski, Stanley V.; McGill, R. Andrew [U.S. Naval Research Laboratory, Code 6365, Washington, District of Columbia 20375 (United States)

2007-06-15

381

Explosive Auto-Enhancement Device.  

National Technical Information Service (NTIS)

An explosive auto-enhancement device for providing higher detonation pressure than can be achieved with conventional explosives by the use of magnetic precompression for enhancing the detonation wave. A cylindrical armature containing an explosive charge ...

E. T. Toten E. Zimet

1980-01-01

382

2012 Biological Device Application Approvals  

Center for Biologics Evaluation and Research (CBER)

... 2012 Biological Device Application Approvals. ... BK120024, One Lambda, Inc 21001 Kittridge St Canoga Park, CA 91303, 12/20/2012. ... More results from www.fda.gov/biologicsbloodvaccines/developmentapprovalprocess/biologicalapprovalsbyyear

383

Reprocessing of Reusable Medical Devices  

MedlinePLUS

... Reprocessing Medical Devices in Health Care Settings: Validation Methods and Labeling Public Workshop - Reprocessing of Reusable Medical ... 10903 New Hampshire Avenue Silver Spring, MD 20993 Ph. 1-888-INFO-FDA (1-888-463-6332) ...

384

Polymer electronic devices and materials.  

SciTech Connect

Polymer electronic devices and materials have vast potential for future microsystems and could have many advantages over conventional inorganic semiconductor based systems, including ease of manufacturing, cost, weight, flexibility, and the ability to integrate a wide variety of functions on a single platform. Starting materials and substrates are relatively inexpensive and amenable to mass manufacturing methods. This project attempted to plant the seeds for a new core competency in polymer electronics at Sandia National Laboratories. As part of this effort a wide variety of polymer components and devices, ranging from simple resistors to infrared sensitive devices, were fabricated and characterized. Ink jet printing capabilities were established. In addition to promising results on prototype devices the project highlighted the directions where future investments must be made to establish a viable polymer electronics competency.

Schubert, William Kent; Baca, Paul Martin; Dirk, Shawn M.; Anderson, G. Ronald; Wheeler, David Roger

2006-01-01

385

Infrared microthermography of microfabricated devices.  

PubMed

We report a new experimental apparatus for infrared microthermography applicable to a wide class of samples including semitransparent ones and perforated devices. This setup is particularly well suited for the thermography of microfabricated devices. Traditionally, temperature calibration is performed using calibration hot plates, but this is not applicable to transmissive samples. In this work a custom designed miniature calibration oven in conjunction with spatial filtering is used to obtain accurate static and transient temperature maps of actively heated devices. The procedure does not require prior knowledge of the emissivity. Calibration and image processing algorithms are discussed and analyzed. We show that relatively inexpensive uncooled bolometer arrays can be a suitable detector choice in certain radiometric applications. As an example, we apply this method in the analysis of temperature profiles of an actively heated microfabricated preconcentrator device that incorporates a perforated membrane and is used in trace detection of illicit substances. PMID:17614631

Furstenberg, Robert; Kendziora, C A; Stepnowski, Stanley V; McGill, R Andrew

2007-06-01

386

Medical Device Review at CBER  

Center for Biologics Evaluation and Research (CBER)

Text Version... ways, several different times, trying to describe the areas that they ... SLIDE 51 This concludes the presentation, "Medical Device Review at CBER". ... More results from www.fda.gov/downloads/biologicsbloodvaccines/internationalactivities

387

Wearable devices for telemedicine applications.  

PubMed

Wearable medical devices can provide both continuous monitoring and ubiquitous treatment. Challenges in this area include the need for a low-power/power-saving design to extend battery life and to reduce the size of the battery itself. This is followed by size and weight restrictions to meet patient expectations of what is 'wearable', the biocompatibility of all outer housings and the final assembly concept. Two examples of wearable medical device are described: a wrist-wearable telemedicine monitor for heart patients (AMON) and a generic belt-integrated computing platform for home and hospital use (QBIC). The electrocardiogram (ECG), the blood oxygen saturation (SpO2) sensor and the blood pressure meter of the AMON device were tested with 29 subjects. The sensors were found to be functional, but as expected the data processing algorithms will need some fine-tuning. The prototype QBIC demonstrates a size reduction of 30-50% in relation to comparable devices. PMID:16035978

Scheffler, M; Hirt, E

2005-01-01

388

Physical Models of MOSFET Devices.  

National Technical Information Service (NTIS)

This report presents research directed toward the development of a mathematical model for MOSFET operation that is based upon physical mechanisms associated with the operation of this semiconductor device. A principal objective of this effort is to develo...

D. P. Kennedy F. A. Lindholm

1975-01-01

389

Dual-Mode Photonic Devices.  

National Technical Information Service (NTIS)

The goal of this effort was to exploit the physical interactions underlying the newly discovered photochromic optical memory system (POMS) in a different type of photonic device. The POMS approach had been used to implement optical control of optical data...

J. Chalken

1998-01-01

390

Cryogenic Magnetostrictive Materials and Devices  

NASA Astrophysics Data System (ADS)

Energen has patented KelvinAll™, the first material, to exhibit magnetostrictive properties from elevated temperatures to near absolute zero, opening up a new range of applications for magnetostrictive devices. Magnetostrictive materials change their shape in the presence of a magnetic field. This elongation is precise, predictable, reversible and repeatable thereby enabling practical electromechanical devices. KelvinAll has magnetostriction comparable to Terfenol-D at room temperature and its magnetostriction increases at cryogenic temperatures. Energen has developed and prototyped practical electromechanical devices using KelvinAll. These devices include tuners for superconducting radio frequency (SRF) cavities, components for magnetic refrigerators, flow control valves and precision translation stages some of which will be discussed in greater detail. Energen's KelvinAll products enhance performance, increase reliability and reduce development costs.

Joshi, C. H.; Mavanur, A.; Tai, C.-Y.; Han, Z.-X.; Rodenbush, A. J.; Wong, Y.

2004-06-01

391

Medical Device Reporting for Manufacturers, March 1997.  

National Technical Information Service (NTIS)

This guidance document describes the new Medical Device Reporting requirements for manufacturers. It is intended for both domestic and foreign medical device manufacturers, and is based on the Medical Device Reporting (MDR) requirement published in the fi...

1997-01-01

392

Orthotic Devices Using Lightweight Composite Materials.  

National Technical Information Service (NTIS)

Potential applications of high strength, lightweight composite technology in the orthotic field were studied. Several devices were designed and fabricated using graphite-epoxy composite technology. Devices included shoe plates, assistive walker devices, a...

E. Harrison

1983-01-01

393

49 CFR 173.175 - Permeation devices.  

Code of Federal Regulations, 2011 CFR

...175 Permeation devices. Permeation devices that contain hazardous materials and that are used for calibrating air quality monitoring devices are not subject to the requirements of this subchapter provided the following requirements are...

2011-10-01

394

49 CFR 173.175 - Permeation devices.  

Code of Federal Regulations, 2012 CFR

...175 Permeation devices. Permeation devices that contain hazardous materials and that are used for calibrating air quality monitoring devices are not subject to the requirements of this subchapter provided the following requirements are...

2012-10-01

395

Fault Protection Circuit for Power Switching Device.  

National Technical Information Service (NTIS)

A fault protection circuit for a power switching device. The circuit comprises a driver circuit electrically connected to the power switching device, a saturation comparator electrically connected to the collector of the switching device to determine if t...

J. R. Raposa

1994-01-01

396

78 FR 15878 - Taxable Medical Devices; Correction  

Federal Register 2010, 2011, 2012, 2013

...9604] RIN 1545-BJ44 Taxable Medical Devices; Correction AGENCY: Internal...imposed on the sale of certain medical devices, enacted by the Health Care...Sec. 48.4191-2 Taxable medical device. * * * * * (b) * * *...

2013-03-13

397

Investigation of Ferromagnetic Semiconductor Devices for Spintronics.  

National Technical Information Service (NTIS)

Spintronic devices are being developed as an alternative to conventional semiconductor devices for many applications including information storage, communications and information processing. Hybrid unipolar devices comprising ferromagnetic metals and semi...

B. Wessels

2010-01-01

398

47 CFR 15.103 - Exempted devices.  

Code of Federal Regulations, 2010 CFR

...directly connected with medical treatment. (f) Digital devices that have a power consumption not exceeding 6 nW. (g) Joystick controllers or similar devices, such as a mouse, used with digital devices but which contain only non-digital...

2010-10-01

399

47 CFR 15.103 - Exempted devices.  

Code of Federal Regulations, 2010 CFR

...directly connected with medical treatment. (f) Digital devices that have a power consumption not exceeding 6 nW. (g) Joystick controllers or similar devices, such as a mouse, used with digital devices but which contain only non-digital...

2009-10-01

400

FET device with suspended graphene  

NASA Astrophysics Data System (ADS)

Because of its linear electronic dispersion, graphene has been intensively studied for electronic application. Top-gated FET device has been measured [1]. Here we study the FET with high quality suspended graphene under high source-drain bias voltage. In addition, two-dimensional temperature distribution of the whole device has been detected by the Raman shift of its 2D peak around 2700cm-1. [4pt] [1] Inanc Meric et al. Nature Nanotechnology 3, 654 - 659 (2008).

Lu, Jian Ming; Tang, Zi Kang

2010-03-01

401

How a CMOS Device Works  

NSDL National Science Digital Library

This website includes an animation of a CMOS device and how it works. Objective: Identify the required electrical variables that allow a CMOS device to operate. This simulation is from Module 001 of the Process & Equipment I Cluster of the MATEC Module Library (MML). To view other clusters or for more information about the MML visit http://matec.org/ps/library3/process_I.shtmlKey

2012-11-02

402

Terahertz reconfigurable devices using graphene  

NASA Astrophysics Data System (ADS)

This paper reviews the first demonstrations of broadband graphene terahertz modulators as well as recent progress on reconfigurable terahertz devices using graphene. Although atom-thick, single layer graphene is capable of efficiently tuning terahertz absorption meanwhile introducing negligible insertion loss. Recent developments in terms of transmission-mode and reflection-mode electro-absorption modulators are reviewed. Moreover, an application of these devices is presented and discussed: arrays of graphene electro-absorption modulators as electrically reconfigurable patterns for terahertz cameras.

Sensale Rodriguez, Berardi; Xing, Huili G.

2013-09-01

403

Lih thermal energy storage device  

DOEpatents

A thermal energy storage device for use in a pulsed power supply to store waste heat produced in a high-power burst operation utilizes lithium hydride as the phase change thermal energy storage material. The device includes an outer container encapsulating the lithium hydride and an inner container supporting a hydrogen sorbing sponge material such as activated carbon. The inner container is in communication with the interior of the outer container to receive hydrogen dissociated from the lithium hydride at elevated temperatures.

Olszewski, Mitchell (Knoxville, TN); Morris, David G. (Knoxville, TN)

1994-01-01

404

Cardiac Device Therapy in Children  

Microsoft Academic Search

It is ironic that the first transistorized, wearable pacemaker was designed by Earl Bakken specifically to make open heart\\u000a surgery in children possible (1). Despite their pediatric origins, however, current heart rhythm control devices and leads\\u000a are not designed or manufactured for children. Instead, they are designed with adults in mind, with respect to device size\\u000a and lead length, as

George F. Van Hare

405

21 CFR 888.3080 - Intervertebral body fusion device.  

Code of Federal Regulations, 2013 CFR

...SERVICES (CONTINUED) MEDICAL DEVICES ORTHOPEDIC DEVICES Prosthetic Devices § 888.3080 Intervertebral body fusion device...component spinal device made from a variety of materials, including titanium and polymers. The device is inserted into the...

2013-04-01

406

21 CFR 878.4930 - Suture retention device.  

Code of Federal Regulations, 2013 CFR

... MEDICAL DEVICES GENERAL AND PLASTIC SURGERY DEVICES Surgical Devices § 878.4930 Suture retention device. (a...retention device is a device, such as a retention bridge, a surgical button, or a suture bolster, intended to aid wound...

2013-04-01

407

Theoretical tools for semiconductors devices  

SciTech Connect

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Future generations of Very Large Scale Integrated (VLSI) circuits require semiconducting devices that are much faster and smaller than current devices. Three-dimensional and transient effects are critical to the performance of these devices. Yet using Monte Carlo (MC) codes to perform time-dependent, three-dimensional simulations will not be feasible in the foreseeable future. Here we re-analyze the physics of semiconductors; use singular perturbation techniques to derive the reduced-dimensionality equations that accurately describe the semiconductor in the regimes corresponding to ultra-small ultra-fast devices; and validate the resulting theoretical models against MC simulations and experimental data. The objective of this project was to gain the capability of accurately simulating ultra-small ultra-fast devices in three spatial dimensions with the ultimate goal of transforming the design of advanced devices.

Hagan, P.; Cox, R.; Randall, E.; Reyna, L. [and others

1996-10-01

408

CIRSE Vascular Closure Device Registry  

SciTech Connect

Purpose: Vascular closure devices are routinely used after many vascular interventional radiology procedures. However, there have been no major multicenter studies to assess the safety and effectiveness of the routine use of closure devices in interventional radiology. Methods: The CIRSE registry of closure devices with an anchor and a plug started in January 2009 and ended in August 2009. A total of 1,107 patients were included in the registry. Results: Deployment success was 97.2%. Deployment failure specified to access type was 8.8% [95% confidence interval (95% CI) 5.0-14.5] for antegrade access and 1.8% (95% CI 1.1-2.9) for retrograde access (P = 0.001). There was no difference in deployment failure related to local PVD at the access site. Calcification was a reason for deployment failure in only <0.5% of patients. Postdeployment bleeding occurred in 6.4%, and most these (51.5%) could be managed with light manual compression. During follow-up, other device-related complications were reported in 1.3%: seven false aneurysms, three hematoma >5.9 cm, and two vessel occlusions. Conclusion: The conclusion of this registry of closure devices with an anchor and a plug is that the use of this device in interventional radiology procedures is safe, with a low incidence of serious access site complications. There seems to be no difference in complications between antegrade and retrograde access and other parameters.

Reekers, Jim A., E-mail: j.a.reekers@amc.uva.nl [Academic Medical Center, Department of Radiology (Netherlands); Mueller-Huelsbeck, Stefan [Academic Hospitals, Department of Radiology (Germany); Libicher, Martin [University Clinics, Department of Radiology (Germany); Atar, Eli [Hasharon Hospital, Department of Radiology (Israel); Trentmann, Jens [University Clinics Schleswig-Holstein, Department of Radiology (Germany); Goffette, Pierre [University Clinics St. Luc, Department of Radiology (Belgium); Borggrefe, Jan [University Clinics Schleswig-Holstein, Department of Radiology (Germany); Zelenak, Kamil [University Hospital, Department of Radiology (Slovakia); Hooijboer, Pieter [Scheper Ziekenhuis, Department of Radiology (Netherlands); Belli, Anna-Maria [St. Georges Hospital, Department of Radiology (United Kingdom)

2011-02-15

409

Orthopaedic and Rehabilitation Devices Panel Meeting ...  

Center for Biologics Evaluation and Research (CBER)

... Orthopaedic and Rehabilitation Devices Panel Meeting - March 31, 2009. The Orthopaedic and Rehabilitation Devices ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

410

21 CFR 866.2580 - Gas-generating device.  

Code of Federal Regulations, 2013 CFR

...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology Devices § 866.2580 Gas-generating device. (a) Identification. A...

2013-04-01

411

21 CFR 866.2500 - Microtiter diluting and dispensing device.  

Code of Federal Regulations, 2013 CFR

...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology Devices § 866.2500 Microtiter diluting and dispensing device. (a) Identification....

2013-04-01

412

21 CFR 866.2660 - Microorganism differentiation and identification device.  

Code of Federal Regulations, 2010 CFR

...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology Devices § 866.2660 Microorganism differentiation and identification device. (a)...

2010-04-01

413

2011 Meeting Materials of the Immunology Devices Panel  

Center for Biologics Evaluation and Research (CBER)

... Medical Devices. Medical Devices Advisory Committee. Immunology Devices Panel. ... 2011 Meeting Materials of the Immunology Devices Panel. -. -. ... More results from www.fda.gov/advisorycommittees/committeesmeetingmaterials/medicaldevices

414

Coronary interventional devices: balloon, atherectomy, thrombectomy and distal protection devices.  

PubMed

With increased operator experience and improved device technology, there has been a constant growth in the number of complex lesions (ie, thrombotic lesions, diffuse lesions,calcified lesions, nondilatable rigid lesions, ostial lesions, bifurcations, and chronic total occlusions) attempted by interventionalists with the use of drug-eluting stents. Although coronary stent implantation remains the mainstay and ultimate step for the treatment of most coronary lesions, adjunctive devices may be essential for lesion preparation in some cases (5%-10%) to allow stent deployment and expansion and prevent distal embolization. Thrombectomy and distal protection devices have shown to be effective in the interventions of saphenous vein graft lesions, although their use remains unproven in acute myocardial infarctions. PMID:16781938

Sharma, Samin K; Chen, Victor

2006-05-01

415

49 CFR 179.220-17 - Gauging devices, top loading and unloading devices, venting and air inlet devices.  

Code of Federal Regulations, 2011 CFR

...unloading devices, venting and air inlet devices. 179.220-17...unloading devices, venting and air inlet devices. (a...be equipped with one separate air connection. (b) When...bowl must be of good welding quality in conjunction with the...

2011-10-01

416

49 CFR 179.220-17 - Gauging devices, top loading and unloading devices, venting and air inlet devices.  

Code of Federal Regulations, 2012 CFR

...unloading devices, venting and air inlet devices. 179.220-17...unloading devices, venting and air inlet devices. (a...be equipped with one separate air connection. (b) When...bowl must be of good welding quality in conjunction with the...

2012-10-01

417

Variable angle photometric characterization of a laminated glass embedding a lamellae system  

Microsoft Academic Search

Glazing units containing sunshading devices (vertical blades, roller shutters, Venetian blinds, etc.) are available on the market nowadays. These products are roughly divided into two families: double-glazed units with automatically controlled devices in the interspace and monolithic glasses embedding fixed devices. The luminous and solar behaviour of the incorporated sunshading devices is intentionally strongly dependent on the position of the

G Fusco; G Macrelli; P Polato; G Rossi

1999-01-01

418

Radiation-tolerant imaging device  

DOEpatents

A barrier at a uniform depth for an entire wafer is used to produce imaging devices less susceptible to noise pulses produced by the passage of ionizing radiation. The barrier prevents charge created in the bulk silicon of a CCD detector or a semiconductor logic or memory device from entering the collection volume of each pixel in the imaging device. The charge barrier is a physical barrier, a potential barrier, or a combination of both. The physical barrier is formed by an SiO{sub 2} insulator. The potential barrier is formed by increasing the concentration of majority carriers (holes) to combine with the electron`s generated by the ionizing radiation. A manufacturer of CCD imaging devices can produce radiation-tolerant devices by merely changing the wafer type fed into his process stream from a standard wafer to one possessing a barrier beneath its surface, thus introducing a very small added cost to his production cost. An effective barrier type is an SiO{sub 2} layer. 7 figs.

Colella, N.J.; Kimbrough, J.R.

1996-11-19

419

Radiation-tolerant imaging device  

DOEpatents

A barrier at a uniform depth for an entire wafer is used to produce imaging devices less susceptible to noise pulses produced by the passage of ionizing radiation. The barrier prevents charge created in the bulk silicon of a CCD detector or a semiconductor logic or memory device from entering the collection volume of each pixel in the imaging device. The charge barrier is a physical barrier, a potential barrier, or a combination of both. The physical barrier is formed by an SiO.sub.2 insulator. The potential barrier is formed by increasing the concentration of majority carriers (holes) to combine with the electron's generated by the ionizing radiation. A manufacturer of CCD imaging devices can produce radiation-tolerant devices by merely changing the wafer type fed into his process stream from a standard wafer to one possessing a barrier beneath its surface, thus introducing a very small added cost to his production cost. An effective barrier type is an SiO.sub.2 layer.

Colella, Nicholas J. (Livermore, CA); Kimbrough, Joseph R. (Pleasanton, CA)

1996-01-01

420

Survey of cryogenic semiconductor devices  

SciTech Connect

Improved reliability and electronic performance can be achieved in a system operated at cryogenic temperatures because of the reduction in mechanical insult and in disruptive effects of thermal energy on electronic devices. Continuing discoveries of new superconductors with ever increasing values of T{sub c} above that of liquid nitrogen temperature (LNT) have provided incentive for developing semiconductor electronic systems that may also operate in the superconductor`s liquid nitrogen bath. Because of the interest in high-temperature superconductor (HTS) devices, liquid nitrogen is the cryogen of choice and LNT is the temperature on which this review is focused. The purpose of this survey is to locate and assemble published information comparing the room temperature (298 K), performance of commercially available conventional and hybrid semiconductor device with their performance at LNT (77K), to help establish their candidacy as cryogenic electronic devices specifically for use at LNT. The approach to gathering information for this survey included the following activities. Periodicals and proceedings were searched for information on the behavior of semiconductor devices at LNT. Telephone calls were made to representatives of semiconductor industries, to semiconductor subcontractors, to university faculty members prominent for their research in the area of cryogenic semiconductors, and to representatives of the National Aeronautics and Space Administration (NASA) and NASA subcontractors. The sources and contacts are listed with their responses in the introduction, and a list of references appears at the end of the survey.

Talarico, L.J.; McKeever, J.W.

1996-04-01

421

Galium-arsenide power devices  

NASA Astrophysics Data System (ADS)

Available data indicate the feasibility of producing GaAs power devices much smaller in volume and mass than silicon devices of the same power rating, with a much shorter switching time. This is attributable to the higher critical electric field intensity for breakdown of GaAs junctions and the correspondingly higher concentration of the majority-carrier N-impurity. The governing factor is the effective thickness of the p-base, smaller than that of the n-base in silicon structures and comparable GaAs structures or equal to it in GaAs structures with symmetric bases. Estimates for GaAs diodes with p(+)pnn(+)-structures indicate a forward voltage drop not exceeding 2.1 V at a current density of 750 A/sq cm in 80% of devices with W/L = 3. Factors favoring further development of GaAs devices in preference to silicon devices are not only higher current densities and correspondingly smaller dimensions as well as more ideal switching and transient characteristics but also much lower temperature and much shorter time of the epitaxial process.

Alferov, Z. I.; Tuchkevich, V. M.; Chelnokov, V. Y.

1984-09-01

422

Spectral utilization in thermophotovoltaic devices  

SciTech Connect

Multilayer assemblies of epitaxially-grown, III-V semiconductor materials are being investigated for use in thermophotovoltaic (TPV) energy conversion applications. It has been observed that thick, highly-doped semiconductor layers within cell architectures dominate the parasitic free-carrier absorption (FCA) of devices at wavelengths above the bandgap of the semiconductor material. In this work, the wavelength-dependent, free-carrier absorption of p- and n-type InGaAs layers grown epitaxially onto semi-insulating (SI) InP substrates has been measured and related to the total absorption of long-wavelength photons in thermophotovoltaic devices. The optical responses of the TPV cells are then used in the calculation of spectral utilization factors and device efficiencies.

Clevenger, M.B.; Murray, C.S.

1997-12-31

423

Antibacterial surfaces for biomedical devices.  

PubMed

Despite considerable research and development efforts, the problem of infections related to biomedical devices and implants persists. Bacteria evidently can readily colonize surfaces of synthetic materials, such as those used for the fabrication of catheters, hip and knee implants, and many other devices. As the growing colony encapsulates itself with a protective exocellular bacterial polysaccharide layer, the biofilm becomes much harder to combat than circulating bacteria. Thus, there is a strong need to mitigate bacterial colonization by equipping the surfaces of biomedical devices and implants with features such as surface chemistry and surface roughness that are unfavorable for bacterial attachment. Here we review a number of strategies used for the design of antibacterial coatings. We also discuss specific issues that arise from using various types of coatings. PMID:19751126

Vasilev, Krasimir; Cook, Jessica; Griesser, Hans J

2009-09-01

424

Survey of hydrogen monitoring devices  

SciTech Connect

Presented are results of a survey of commercially available monitoring devices suitable for hydrogen detection in the secondary containment vessel of a nuclear power plant during the post postulated accident period. Available detectors were grouped into the following five classes: combustion, solid state, electrochemical, thermal conductivity, and absorption. The performance of most available sensors is likely to deteriorate when exposed to the postulated conditions which include moisture, which could be at high temperature, and radioactive noncondensibles. Of the commercial devices, those using metallic filament thermal conductivity detectors seem least susceptible to performance change. Absorption detectors are best suited for this monitoring task but the only available device is designed for pipeline corrosion assessment. Initiation of experimental study to assess apparent deficiencies of commercial detectors is recommended. Also recommended is an analytical/experimental effort to determine the optimum detector array for monitoring in the secondary containment vessels.

Lai, W.

1981-01-01

425

Ventricular assist devices: initial orientation.  

PubMed

Ventricular assist device (VAD) technology has come from large pulsatile-flow devices with a high rate of technical malfunctions to small continuous flow (cf) devices. Mechanical circulatory support (MCS) systems may be used as short-, mid- or long-term support. Especially if mid- or long-term support is anticipated left VADs (LVADs) have been reported with excellent one and two year survival rates and improved quality of life (QoL). Timing of implantation, patient selection, assessing function of the right ventricular and surgical considerations regarding surgical access side, valve pathology and exit side of the percutaneous lead remain crucial issues for the outcome. In contrast VADs designed for children especially for all age groups, are still underrepresented but increased experience with existing pediatric VADs as well as introduction of second and third generation VADs into in the pediatric age group, offer new perspectives. PMID:23991317

Schweiger, Martin; Dave, Hitendu; Lemme, Frithjof; Romanchenko, Olga; Hofmann, Michael; Hübler, Michael

2013-08-01

426

["Medical devices and European regulations"].  

PubMed

In order to put on the European Market, the medical devices shall be in conformity with two European Directives transcribed in national regulation: Directive 90/385/CEE--20 June 1990: concerning the implantable active medical devices, mandatory since the 1/01/95; Directive 93/42/CEE--13 June 1993: concerning the medical devices, applicable since the 1/01/95 and mandatory the 14/06/98. Both impose the conformity to essential requirements which can be proved by different procedures of evaluation verified by notify bodies. Then, the CE mark, technical passport, can be apposed. To demonstrate this conformity, the manufacturers can use harmonized european standards without obligation. The "Safety clause" allows to follow the "well-founded" of the CE marking and the national systems of vigilance to register and evaluate the incidents and to define corrective actions. PMID:9181704

Fleur, F

1997-01-01

427

Stereoscopic x-ray device  

SciTech Connect

A stereoscopic x-ray device used for stereoscopic radiography generates x-rays from a pair of x-ray focal spots. The x-ray device is provided with an evacuated envelope, an x-ray target within the evacuated envelope, and a cathode structure having at least two pairs of filaments. The first pair of filaments form relatively large size x-ray focal spots on the target. The second pair of the filaments form relatively small size x-ray focal spots on the target and are situated between the first pair of filaments on the cathode structure. As a result of these two pairs of focal spots on the x-ray target, a relatively small xray device can be used to provide magnification of stereoscopic images of high stereo quality.

Muraki, T.; Yamamura, T.

1981-09-01

428

Future trends in high power devices  

Microsoft Academic Search

Power devices for MW and GW power electronics are discussed. The most important device concepts of today are Phase Controlled Thyristor (PCT), Integrated Gate Commutated Thyristor (IGCT), Insulated Gate Bipolar Transistor (IGBT), and PIN diode. In spite of long-term intensive research of compound semiconductor materials and related devices, the world of high-power devices is dominated by silicon. In the light

J. Vobecky

2010-01-01

429

Electrostatic Discharge Failures of Semiconductor Devices  

Microsoft Academic Search

ESD (Electrostatic Discharge) is a significant cause of device failures at all stages of device and equipment production, assembly, test, installation and field use. Even though device designs include protection circuitry, it is relatively easy to generate static potentials during handling and shipping that exceed the limits of the protection networks. Damage from ESDs can cause either complete device failure

B. A. Unger

1981-01-01

430

Tubes, lines, catheters, and other interesting devices  

Microsoft Academic Search

Medical devices (tubes, catheters, lines, prostheses, etc.) are a common finding on radiologic studies. Sometimes they may be misdiagnosed as a pathologic process, or an important observation concerning a medical device may be overlooked because of lack of familiarity with a particular device. This review discusses a variety of tubes, lines, catheters, and other interesting and important medical devices found

Tim B. Hunter

1995-01-01

431

Protecting health information on mobile devices  

Microsoft Academic Search

Mobile applications running on devices such as smart phones and tablets will be increasingly used to provide convenient access to health information to health professionals and patients. Also, patients will use these devices to transmit health information captured by sensing devices in settings like the home to remote repositories. As mobile devices become targets of security threats, we must address

Musheer Ahmed; Mustaque Ahamad

2012-01-01

432

Microfluidic devices for cellomics: a review  

Microsoft Academic Search

A review of microfluidic devices for cellomics is presented. After a brief description of the historical background of Lab-on-Chip (LOC) devices, different areas are reviewed. Devices for cell sampling are presented, followed by cell trapping and cell sorting devices based upon mechanical and electrical principles. Subsequently, a popular type of cell sorters, flow cytometers, is considered, followed by a chapter

Helene Andersson; Albert van den Berg

2003-01-01

433

Using Zigbee to Integrate Medical Devices  

Microsoft Academic Search

Wirelessly enabling medical devices such as vital signs monitors, ventilators and infusion pumps allows central data collection. This paper discusses how data from these types of devices can be integrated into hospital systems using wireless sensor networking technology. By integrating devices you are protecting investment and opening up the possibility of networking with similar devices. In this context we present

Paul Frehill; Desmond Chambers; Cosmin Rotariu

2007-01-01

434

Handheld Devices for Ubiquitous Learning and Analyzing  

Microsoft Academic Search

Wireless handheld devices (WHDs) include but are not limited to cellphones, personal digital assistants and handheld gaming devices. Despite their differences, WHDs offer similar capabilities as they evolve technologically and become staples of American culture. Indeed, students and teachers are increasingly likely to own WHDs, offering educators and learners opportunities to harness the affordances such devices provide. The Handheld Devices

Edward Dieterle

435

Assessing Users' Attachment to Their Mobile Devices  

Microsoft Academic Search

Mobile devices are often described as very personal objects and users are said to develop deep relationships with them. Motivated by such recurring statements, this paper introduces user-device attachment as a concept describing the relationship between users and their mobile devices. By drawing on literature from marketing, HCI, and sociology, the domain and dimensions of user-device attachment are described. Three

Kai Wehmeyer

2007-01-01

436

Device physics and operation of lateral bulk heterojunction devices.  

PubMed

Measurements of lateral bulk heterojunction (BHJ) devices have recently been reported as a means to characterize charge transport and recombination properties within organic photovoltaic (OPV) materials. These structures allow for the direct measurement of the lateral extents of the space charge regions, potential and electric field profiles, current versus voltage characteristics, and other physical and chemical properties. This article describes numerical simulations that show three different transport regimes present within lateral BHJ devices and two different experimental methods, which verify those findings. These measurement techniques utilize typical confocal microscopy tools as well as steady-state current versus voltage measurements on high aspect ratio nanofabricated structures in order to probe the material properties between the electrodes. Experimental results show that the lateral extents of space charge regions within these devices are approximately 1-5 ?m, which are related to the drift lengths of the charge carriers, and that the mechanism of bimolecular recombination is shown to be a bulk material property. The results within this article describe a series of methods to evaluate charge transport and recombination along the in-plane direction in BHJ films and provide complementary insights to those obtained from vertical-device-based measurements. PMID:23448403

Lombardo, Christopher J; Danielson, Eric L; Glaz, Micah S; Ooi, Zi-En; Vanden Bout, David A; Dodabalapur, Ananth

2013-03-20

437

TOPICAL REVIEW Nanoscale memory devices  

NASA Astrophysics Data System (ADS)

This article reviews the current status and future prospects for the use of nanomaterials and devices in memory technology. First, the status and continuing scaling trends of the flash memory are discussed. Then, a detailed discussion on technologies trying to replace flash in the near-term is provided. This includes phase change random access memory, Fe random access memory and magnetic random access memory. The long-term nanotechnology prospects for memory devices include carbon-nanotube-based memory, molecular electronics and memristors based on resistive materials such as TiO2.

Chung, Andy; Deen, Jamal; Lee, Jeong-Soo; Meyyappan, M.

2010-10-01

438

Electromedical devices test laboratories accreditation  

NASA Astrophysics Data System (ADS)

In the last years, the technology and equipment at hospitals have been increase in a great way as the risks of their implementation. Safety in medical equipment must be considered an important issue to protect patients and their users. For this reason, test and calibrations laboratories must verify the correct performance of this kind of devices under national and international standards. Is an essential mission for laboratories to develop their measurement activities taking into account a quality management system. In this article, we intend to transmit our experience working to achieve an accredited Test Laboratories for medical devices in National technological University.

Murad, C.; Rubio, D.; Ponce, S.; Álvarez Abri, A.; Terrón, A.; Vicencio, D.; Fascioli, E.

2007-11-01

439

Solid-State Device Theory  

NSDL National Science Digital Library

Written by Tony R. Kuphaldt, this chapter of All About Circuit's third volume on Semiconductors "will cover the physics behind the operation of semiconductor devices and show how these principles are applied in several different types of semiconductor devices." The chapter is divided up into fifteen sections, on topics from quantum physics to junction diodes to thyristors. Each section has clear illustrations and a concise, bulleted review of what was covered at the end, and the resource as a whole is excellent for use in applied physics classrooms.

Kuphaldt, Tony R.

2008-07-03

440

NEUTRON ABSORPTION AND SHIELDING DEVICE  

DOEpatents

A neutron absorption and shielding device is described which is adapted for mounting in a radiation shielding wall surrounding a radioactive area through which instrumentation leads and the like may safely pass without permitting gamma or neutron radiation to pass to the exterior. The shielding device comprises a container having at least one nonrectilinear tube or passageway means extending therethrough, which is adapted to contain instrumentation leads or the like, a layer of a substance capable of absorbing gamma rays, and a solid resinous composition adapted to attenuate fast-moving neutrons and capture slow- moving or thermal neutrons.

Axelrad, I.R.

1960-06-21

441

Surface-micromachined microfluidic devices  

DOEpatents

Microfluidic devices are disclosed which can be manufactured using surface-micromachining. These devices utilize an electroosmotic force or an electromagnetic field to generate a flow of a fluid in a microchannel that is lined, at least in part, with silicon nitride. Additional electrodes can be provided within or about the microchannel for separating particular constituents in the fluid during the flow based on charge state or magnetic moment. The fluid can also be pressurized in the channel. The present invention has many different applications including electrokinetic pumping, chemical and biochemical analysis (e.g. based on electrophoresis or chromatography), conducting chemical reactions on a microscopic scale, and forming hydraulic actuators.

Galambos, Paul C. (Albuquerque, NM); Okandan, Murat (Albuquerque, NM); Montague, Stephen (Albuquerque, NM); Smith, James H. (Redmond, WA); Paul, Phillip H. (Livermore, CA); Krygowski, Thomas W. (Cortlandt Manor, NY); Allen, James J. (Albuquerque, NM); Nichols, Christopher A. (Hauppauge, NY); Jakubczak, II, Jerome F. (Rio Rancho, NM)

2003-01-01

442

Lossless hybridization between photovoltaic and thermoelectric devices  

NASA Astrophysics Data System (ADS)

The optimal hybridization of photovoltaic (PV) and thermoelectric (TE) devices has long been considered ideal for the efficient harnessing solar energy. Our hybrid approach uses full spectrum solar energy via lossless coupling between PV and TE devices while collecting waste energy from thermalization and transmission losses from PV devices. Achieving lossless coupling makes the power output from the hybrid device equal to the sum of the maximum power outputs produced separately from individual PV and TE devices. TE devices need to have low internal resistances enough to convey photo-generated currents without sacrificing the PV fill factor. Concomitantly, a large number of p-n legs are preferred to drive a high Seebeck voltage in TE. Our simple method of attaching a TE device to a PV device has greatly improved the conversion efficiency and power output of the PV device (~30% at a 15°C temperature gradient across a TE device).

Park, Kwang-Tae; Shin, Sun-Mi; Tazebay, Abdullah S.; Um, Han-Don; Jung, Jin-Young; Jee, Sang-Won; Oh, Min-Wook; Park, Su-Dong; Yoo, Bongyoung; Yu, Choongho; Lee, Jung-Ho

2013-07-01

443

Encapsulation methods for organic electrical devices  

DOEpatents

The disclosure provides methods and materials suitable for use as encapsulation barriers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device encapsulated by alternating layers of a silicon-containing bonding material and a ceramic material. The encapsulation methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices.

Blum, Yigal D.; Chu, William Siu-Keung; MacQueen, David Brent; Shi, Yijian

2013-06-18

444

Piezoelectric Vibration Energy Harvesting Device.  

National Technical Information Service (NTIS)

A piezoelectric vibration energy harvesting device which is made up of a first mass, a second, a first spring coupled to the first mass, and a second spring coupled to the second mass. A piezoelectric element is bonded between the first mass and the secon...

K. Andic K. K. Deng

2005-01-01

445

Ocean Wave Energy Harvesting Devices.  

National Technical Information Service (NTIS)

Development of an ocean wave energy-harvesting device that can be used as a renewable energy source for ocean monitoring systems. The core technology is a mass-spring based high efficiency, low frequency linear generator that was integrated to a spar buoy...

I. E. Childress J. T. Cheung

2007-01-01

446

Performance characteristics of ejector devices  

Microsoft Academic Search

A comprehensive performance analysis of ejector devices, which accounts for compressibility, heterogeneous operating media, and incidental flow losses under the simplifying assumptions of one-dimensional flow conditions and complete mixing at the end of the mixing section, leads to quite lengthy relations, which in part can be solved only by iteration. This report aims at arranging these relations in a way

S. H. Hasinger

1975-01-01

447

Fiber Optic Rotary Switching Device.  

National Technical Information Service (NTIS)

A fiber optic rotary switching device having a single optical fiber rotatable between a plurality of optical fibers. The arrangement for rotating the single optical fiber is designed such that the single optical fiber flexes but does not twist with respec...

S. D. Battle

1986-01-01

448

Intrauterine devices in nulliparous women  

Microsoft Academic Search

The majority of studies on the clinical events following the insertion of an intrauterine device for contraception have observed a higher frequency of adverse effects in nulliparous women. In this review, the significance of nulliparity on the occurrence of medical removal for bleeding and pain, expulsion and pelvic inflammatory disease is estimated. The possible role of the anatomy of the

K. R. Petersen; L. Brooks; B. Jacobsen; S. O. Skouby

1991-01-01

449

A micro cell lysis device  

Microsoft Academic Search

A new micromachined cell lysis device is developed. It is designed for miniature bio-analysis systems where cell lysing is needed to obtain intracellular materials for further analysis such as DNA identification. It consists of multi-electrode pairs to apply electric fields to cells. We adopt the means of using electric field lysing because it can greatly simplify purification steps for preparation

Sang-Wook Lee; Yu-Chong Tai

1999-01-01

450

Quality of inexpensive proofing devices  

NASA Astrophysics Data System (ADS)

The colors in printed products should be known before printing. There are now many inexpensive inkjet printers able to print color. Using color management systems they can be used as proofing devices. The color gamut and the stability of these devices were assessed. There are tow main results of this project: We have developed a procedure and the tools to qualify proofing devices and we have shown that there are inexpensive devices suited for proofing newspaper print. The gamut is wide enough to simulate offset printing on uncoated paper and it is possible to simulate the color tint of the paper on which the final product will be printed. It is possible to attain a small mean Delta E between such an inexpensive proof and the final printed product. This Delta E is often smaller than between an analog proof and the final printed product. The prerequisites are calibration of the printer and color profiles of both the printer and the printing process to be simulated.

Daetwyler, Markus

2000-12-01

451

In situ biofilm coupon device  

DOEpatents

An apparatus for characterization of in-situ microbial biofilm populations in subsurface groundwater. The device permits biofilm-forming microorganisms to adhere to packing material while emplaced in a groundwater strata, so that the packing material can be later analyzed for quantity and type of microorganisms, growth rate, and nutrient requirements.

Peyton, Brent M. (Kennewick, WA); Truex, Michael J. (Richland, WA)

1997-01-01

452

In situ biofilm coupon device  

DOEpatents

An apparatus is disclosed for characterization of in-situ microbial biofilm populations in subsurface groundwater. The device permits biofilm-forming microorganisms to adhere to packing material while emplaced in a groundwater strata, so that the packing material can be later analyzed for quantity and type of microorganisms, growth rate, and nutrient requirements. 3 figs.

Peyton, B.M.; Truex, M.J.

1997-06-24

453

Body Implanted Medical Device Communications  

NASA Astrophysics Data System (ADS)

The medical care day by day and more and more is associated with and reliant upon concepts and advances of electronics and electromagnetics. Numerous medical devices are implanted in the body for medical use. Tissue implanted devices are of great interest for wireless medical applications due to the promising of different clinical usage to promote a patient independence. It can be used in hospitals, health care facilities and home to transmit patient measurement data, such as pulse and respiration rates to a nearby receiver, permitting greater patient mobility and increased comfort. As this service permits remote monitoring of several patients simultaneously it could also potentially decrease health care costs. Advancement in radio frequency communications and miniaturization of bioelectronics are supporting medical implant applications. A central component of wireless implanted device is an antenna and there are several issues to consider when designing an in-body antenna, including power consumption, size, frequency, biocompatibility and the unique RF transmission challenges posed by the human body. The radiation characteristics of such devices are important in terms of both safety and performance. The implanted antenna and human body as a medium for wireless communication are discussed over Medical Implant Communications Service (MICS) band in the frequency range of 402-405MHz.

Yazdandoost, Kamya Yekeh; Kohno, Ryuji

454

Aerosol can waste disposal device  

DOEpatents

Disclosed is a device for removing gases and liquid from containers. The ice punctures the bottom of a container for purposes of exhausting gases and liquid from the container without their escaping into the atmosphere. The device includes an inner cup or cylinder having a top portion with an open end for receiving a container and a bottom portion which may be fastened to a disposal or waste container in a substantially leak-proof manner. A piercing device is mounted in the lower portion of the inner cylinder for puncturing the can bottom placed in the inner cylinder. An outer cylinder having an open end and a closed end fits over the top portion of the inner cylinder in telescoping engagement. A force exerted on the closed end of the outer cylinder urges the bottom of a can in the inner cylinder into engagement with the piercing device in the bottom of the inner cylinder to form an opening in the can bottom, thereby permitting the contents of the can to enter the disposal container.

O' Brien, Michael D. (Las Vegas, NV); Klapperick, Robert L. (Las Vegas, NV); Bell, Chris (Las Vegas, NV)

1993-01-01

455

Device for Stamping out Parts.  

National Technical Information Service (NTIS)

The object of the invention is a device for stamping out parts, for example, from sheet metal through shaping by pressure which is produced through an explosion in a hermetically sealed chamber, the pressure being extered on the surface of stock material ...

R. V. Pikhtovnikov

1965-01-01

456

Designing a Robotic Surgical Device  

NSDL National Science Digital Library

Student teams create laparoscopic surgical robots designed to reduce the invasiveness of diagnosing endometriosis and investigate how the disease forms and spreads. Using a synthetic abdominal cavity simulator, students test and iterate their remotely controlled, camera-toting prototype devices, which must fit through small incisions, inspect the organs and tissue for disease, obtain biopsies, and monitor via ongoing wireless image-taking.

Integrated Teaching And Learning Program

457

Hydroturbine device for generating electricity  

Microsoft Academic Search

A hydro-turbine device includes a frame mounted in a channel through which water flows, the frame mounting a horizontal shaft carrying a turbine wheel having spaced end plates between which extend a plurality of arcuate vanes. A cover is mounted over the rear of the turbine wheel, and carries an extension on the front thereof that has an arcuate scoop

Vary

1984-01-01

458

BYOD: Bring Your Own Device  

Microsoft Academic Search

In this work, we examine the different types of user interactions and deployment issues surrounding large public displays. We then select and develop a usage paradigm in which people use personal devices to interact with large public displays. Lastly, we present a physical interface for in- teracting with large public displays based on camera-enabled mobile phones. Our interface uses both

Rafael Ballagas; Michael Rohs; Jennifer G. Sheridan; Jan Borchers

2004-01-01

459

Native Language Literacy Screening Device.  

ERIC Educational Resources Information Center

|The purpose the Native Language Literacy Screening Device (NLLSD) is to give English for Speakers of Other Languages (ESOL) practitioners a sense of the native language literacy levels of learners coming into their programs. This is worth knowing because when learners have had limited schooling in their first language instructional strategies…

Hudson River Center for Program Development, Glenmont, NY.

460

SAM: an improved input device  

Microsoft Academic Search

SAM allows people to communicate by sending Morse code with a single switch. Unlike most Morse code input devices, SAM allows extreme latitude in the timing of dots and dashes. This makes it usable by people who have trouble mastering the precise timing of conventional Morse code. SAM is portable and inexpensive-it costs about $50 to build and runs on

L. T. Hauck

1992-01-01

461

Electrohydraulic ventricular assist device development.  

PubMed

An electrohydraulic ventricular assist device has been developed. An axial flow pump driven by a brushless DC motor provides actuation. Energy is supplied by internal Ni/Cd batteries and by external Ag/Zn batteries, both rechargeable. Electromagnetic induction is used to pass energy through the skin with a transcutaneous energy transfer (TET) system. Physiologic control, battery management, motor commutation, and communication functions are performed by a surface mount internal controller. An infrared data link within the TET coils provides bidirectional communication between the external and internal controllers. A computer model was developed to predict system performance. The dimensions are 180 mm x 116 mm x 40 mm. An in vitro system pumped 5.7 L/min at 10 mmHg inflow and 100 mmHg outflow pressure. The internal battery can provide the projected energy requirements for 40 min after 540 charge/discharge cycles, and the external battery is capable of 4 hr of operation after 150 cycles. The TET system can deliver 60 W of power and exceeds 80% efficiency between 15 and 30 W. The device configuration is based on human cadaver and intraoperative fit trials. The device is being modified for calf implantation by redirecting the blood ports, increasing the output, and incorporating the internal controller in the unified device base. PMID:1457871

Diegel, P D; Mussivand, T; Holfert, J W; Juretich, J T; Miller, J A; Maclean, G K; Szurmak, Z; Santerre, J P; Rajagopalan, K; Dew, P A

462

Electromechanical Devices. Energy Technology Series.  

ERIC Educational Resources Information Center

|This course in electromechanical devices is one of 16 courses in the Energy Technology Series developed for an Energy Conservation-and-Use Technology curriculum. Intended for use in two-year postsecondary institutions to prepare technicians for employment, the courses are also useful in industry for updating employees in company-sponsored…

Center for Occupational Research and Development, Inc., Waco, TX.

463

Superconductor device markets to flourish  

Microsoft Academic Search

Three international trade groups have predicted that the market for superconducting devices will grow 100-fold in the next three decades. Prospects for commercialization were the focus of the 2nd International Superconductivity Industry Summit (ISIS) in Japan last month. An ISIS survey of about 70 international companies in the superconductor industry forecasts that the global market for high- and low-temperature superconducting

Thayer

1993-01-01

464

Pulsed Measurements on Heterojunction Devices.  

National Technical Information Service (NTIS)

The goal of this project has been the characterization of impact- ionization effects in advanced microwave devices by means of pulsed techniques. Breakdown of GaAs-based MESFETs and HEMTs, and of InP-based HEMTs has been studied by means of 20 - 500 ns pu...

E. Zanoni G. Meneghesso D. Buttari A. Chini M. Maretto

2000-01-01

465

Solar powered, solar aiming device  

Microsoft Academic Search

A solar powered, solar aiming device pivotally mounted on a base is disclosed, which uses a pair of separate solar sensor panels that are insulated from each other and oriented at an angle to each other. Hydraulics angularly pivot the sensor panels relative to the base in response to pressure produced by sunlight shining on sensor tubes and arranged within

R. H. Jr

1983-01-01

466

Mobile Devices in the Classroom  

ERIC Educational Resources Information Center

|As cell phones--with ever-expanding possibilities of texting, Web browsing, and game playing--have multiplied in recent years among teenagers and even preteens, so have the concerns of teachers and administrators about the distractions these devices can cause. A survey of students and parents earlier this year by the group Common Sense Media…

Schachter, Ron

2009-01-01

467

Energy transport in semiconductor devices  

Microsoft Academic Search

The modelling, analysis and numerical approximation of energy-transport models for semiconductor devices are reviewed. The derivation of the partial differential equations from the semiconductor Boltzmann equation is sketched. Furthermore, the main ideas for the analytical treatment of the equations, employing thermodynamic principles, are given. A new result is the proof of the weak sequential stability of approximate solutions to some

Ansgar Jüngel

2010-01-01

468

Nitinol medical devices and implants  

Microsoft Academic Search

Summary Superelastic Nitinol is now a common and well-known engineering materi al in the medical industry. While the greater flexibility of the alloy drives many of its applications, there are also a large number of lesser- known advantages of Niti nol in medical devices. This paper reviews 7 of these less-obvious but very important reasons for Nitinol's success, bot h

D. Stoeckel

2000-01-01

469

Investigation of Superlattice Device Structures.  

National Technical Information Service (NTIS)

This report describes the investigation of growth properties, and the structure of epitaxial multilayer Si(Si(1x)Ge(x)) films grown on bulk Silicon Substrates. It also describes the fabrication and characterization of MOSFET and MESFET devices made on the...

I. S. Gergis H. M. Manasevit A. L. Lin A. B. Jones

1985-01-01

470

Fusion Engineering Device Design Description.  

National Technical Information Service (NTIS)

The US Magnetic Fusion Engineering Act of 1980 calls for the operation of a Fusion Engineering Device (FED) by 1990. It is the intent of the Act that the FED, in combination with other testing facilities, will establish the engineering feasibility of magn...

C. A. Flanagan D. Steiner G. E. Smith

1981-01-01

471

Devices based on semiconductor nanowires  

Microsoft Academic Search

Recently, nanoelectromechanical systems (NEMS) have attracted much attention due to their unique properties and possible applications that differ greatly from those of microelectromechanical systems. NEMS operating frequencies may achieve giga- and terahertz levels and their power consumption and heat capacity is extremely low. Moreover, integration levels may reach 1012 devices per cm-2. In this review, we present techniques for integrating

D. Erts; R. Meija; P. Birjukovs; J. Andzane; M. Studers; R. Lohmus; J. D. Holmes

2009-01-01

472

Mechanical scriber for semiconductor devices  

DOEpatents

A mechanical scriber using a scribing tip, such as a diamond, provides controlled scriber forces with a spring-loaded compound lever arrangement. The scribing force and range of scribing depth are adjusted by a pair of adjustable micrometer heads. A semiconductor device, such as a multilayer solar cell, can be formed into scribed strips at each layer. 5 figs.

Lin, P.T.

1985-03-05

473

Fuel filling and venting device  

Microsoft Academic Search

A liquid fuel tank filling and venting device are disclosed including a hollow body member containing a chamber, an inlet opening for supplying fuel downwardly into the chamber, a fuel outlet opening for supplying fuel from the chamber, and an overflow opening connected with the chamber, each of the fuel outlet and overflow outlets being independently connected with the fuel

Perkins

1994-01-01

474

Fabrication of Optical Fiber Devices  

NASA Astrophysics Data System (ADS)

In this paper we present the main research activities of the Laboratorio de Fibras Opticas del Instituto de Ciencia de los Materiales de la Universidad de Valencia. We show some of the main results obtained for devices based on tapered fibers, fiber Bragg gratings, acousto-optic effects and photonic crystal fibers.

Andres, Miguel V.

475

Surface-Micromachined Microfluidic Devices  

DOEpatents

Microfluidic devices are disclosed which can be manufactured using surface-micromachining. These devices utilize an electroosmotic force or an electromagnetic field to generate a flow of a fluid in a microchannel that is lined, at least in part, with silicon nitride. Additional electrodes can be provided within or about the microchannel for separating particular constituents in the fluid during the flow based on charge state or magnetic moment. The fluid can also be pressurized in the channel. The present invention has many different applications including electrokinetic pumping, chemical and biochemical analysis (e.g. based on electrophoresis or chromatography), conducting chemical reactions on a microscopic scale, and forming hydraulic actuators. Microfluidic devices are disclosed which can be manufactured using surface-micromachining. These devices utilize an electroosmotic force or an electromagnetic field to generate a flow of a fluid in a microchannel that is lined, at least in part, with silicon nitride. Additional electrodes can be provided within or about the microchannel for separating particular constituents in the fluid during the flow based on charge state or magnetic moment. The fluid can also be pressurized in the channel. The present invention has many different applications including electrokinetic pumping, chemical and biochemical analysis (e.g. based on electrophoresis or chromatography), conducting chemical reactions on a microscopic scale, and forming hydraulic actuators.

Galambos, Paul C. (Albuquerque, NM); Okandan, Murat (Albuquerque, NM); Montague, Stephen (Albuquerque, NM); Smith, James H. (Redmond, WA); Paul, Phillip H. (Livermore, CA); Krygowski, Thomas W. (Coutlandt Manor, NY); Allen, James J. (Albuquerque, NM); Nichols, Christopher A. (Hauppauge, NY); Jakubczak, II, Jerome F. (Rio Rancho, NM)

2004-09-28

476

Lookout Assist Device - Engineering Evaluation.  

National Technical Information Service (NTIS)

Prevention of ship collisions is the aim of the new Lookout Assist Device (LAD) developed by Sperry Rand Corporation under contract with the U.S. Maritime Administration. Using visual and audible warnings, LAD extends the capability of detection of other ...

1970-01-01

477

Characteristics of multiarc plasma devices  

Microsoft Academic Search

Multiarc plasma devices such as plasmatrons operate with lower arc currents than single-arc counterparts, which not contributes to a higher efficiency but also extends the life of electrodes. Typically, reduction of the arc current for producing an air plasma from 400 A to 100 A or further to 50 A lengthens the life of zirconium electrodes from 24 h to

V. S. Klubnikin; B. G. Smirnov

1985-01-01

478

Biomedical Devices for the Eyes  

NSDL National Science Digital Library

Students examine the structure and function of the human eye, learning some amazing features about our eyes, which provide us with sight and an understanding of our surroundings. Students also learn about some common eye problems and the biomedical devices and medical procedures that resolve or help to lessen the effects of these vision deficiencies, including vision correction surgery.

Integrated Teaching And Learning Program

479

Interdigitated photovoltaic power conversion device  

DOEpatents

A photovoltaic power conversion device has a top surface adapted to receive impinging radiation. The device includes at least two adjacent, serially connected cells. Each cell includes a semi-insulating substrate and a lateral conductivity layer of a first doped electrical conductivity disposed on the substrate. A base layer is disposed on the lateral conductivity layer and has the same electrical charge conductivity thereof. An emitter layer of a second doped electrical conductivity of opposite electrical charge is disposed on the base layer and forms a p-n junction therebetween. A plurality of spaced channels are formed in the emitter and base layers to expose the lateral conductivity layer at the bottoms thereof. A front contact grid is positioned on the top surface of the emitter layer of each cell. A first current collector is positioned along one outside edge of at least one first cell. A back contact grid is positioned in the channels at the top surface of the device for engagement with the lateral conductivity layer. A second current collector is positioned along at least one outside edge of at least one oppositely disposed second cell. Finally, an interdigitation mechanism is provided for serially connecting the front contact grid of one cell to the back contact grid of an adjacent cell at the top surface of the device.

Ward, James Scott (Englewood, CO); Wanlass, Mark Woodbury (Golden, CO); Gessert, Timothy Arthur (Conifer, CO)

1999-01-01

480

Interdigitated photovoltaic power conversion device  

DOEpatents

A photovoltaic power conversion device has a top surface adapted to receive impinging radiation. The device includes at least two adjacent, serially connected cells. Each cell includes a semi-insulating substrate and a lateral conductivity layer of a first doped electrical conductivity disposed on the substrate. A base layer is disposed on the lateral conductivity layer and has the same electrical charge conductivity thereof. An emitter layer of a second doped electrical conductivity of opposite electrical charge is disposed on the base layer and forms a p-n junction therebetween. A plurality of spaced channels are formed in the emitter and base layers to expose the lateral conductivity layer at the bottoms thereof. A front contact grid is positioned on the top surface of the emitter layer of each cell. A first current collector is positioned along one outside edge of at least one first cell. A back contact grid is positioned in the channels at the top surface of the device for engagement with the lateral conductivity layer. A second current collector is positioned along at least one outside edge of at least one oppositely disposed second cell. Finally, an interdigitation mechanism is provided for serially connecting the front contact grid of one cell to the back contact grid of an adjacent cell at the top surface of the device. 15 figs.

Ward, J.S.; Wanlass, M.W.; Gessert, T.A.

1999-04-27

481

Noise in charge coupled devices  

Microsoft Academic Search

The four general sources of noise in CCD are reviewed which are: signal input, signal output, dark current and trapping noise. The trapping noise in a Surface Channel CCD (SCCD) is mainly due to interface traps and is the dominant noise in this device. In the Buried Channel CCD (BCCD), the low density of bulk traps gives much less trapping

J. F. Detry; C. T. Sah

1978-01-01

482

Optical characterization of power devices  

NASA Astrophysics Data System (ADS)

For the realization of high breakdown voltages, power devices require a thick silicon layer with high resistivity. Therefore, the density of detrimental defects in the electrically active device regions must be extremely low to obtain low leakage currents, low on-state voltages and good stability of the electrical data. Contamination analyses have shown that considerable diffusion of heavy metals into Si wafers can occur due to improper processing. In order to assess the influence of heavy metals on carrier lifetime in power devices, optical analyses of the carrier lifetime and its lateral distribution were performed by the Elymat, the microwave photoconductive decay and the surface photovoltage method. Furthermore, we applied a method based on collector current decay. Contaminations acting as donors were ivnestigated by laser-induced free charge carriers resulting in a lateral voltage drop in the case of lateral doping inhomogeneities. Vertical carrier and temperature profiles have been analyzed by the internal laser deflection method. Comparing the results of all these measurements with the influence on the electrical data, it is found that the electrical data of power devices are very sensitive to contamination.

Schulze, H.-J.; Deboy, G.

1995-09-01

483

Featured Invention: Laser Scaling Device  

Microsoft Academic Search

In September 2003, NASA signed a nonexclusive license agreement with Armor Forensics, a subsidiary of Armor Holdings, Inc., for the laser scaling device under the Innovative Partnerships Program. Coupled with a measuring program, also developed by NASA, the unit provides crime scene investigators with the ability to shoot photographs at scale without having to physically enter the scene, analyzing details

Carol Anne Dunn

2008-01-01

484

Liquid-Level-Sensing Device.  

National Technical Information Service (NTIS)

A liquid level sensing device is described which comprises load cell supporting a column or stack of segments freely resting on one another. The density of each element is substantially identical to that of the surrounding liquid. The elements are freely ...

1981-01-01

485

Ground Contact Area Measurement Device.  

National Technical Information Service (NTIS)

The area of contact between a moving load transfer device (such as a wheel or track) and the surface can be rapidly and accurately measured to determine its magnitude and shape for use in evaluating mobility potential or determining appropriate adjustment...

W. E. Brooks

1982-01-01

486

Plasmonic Platforms for Biodetection Devices  

Microsoft Academic Search

We designed and experimentally realized the prototype for a bio-recognition device based on Grating Coupled Surface Plasmon Resonance (GCSPR) which can find a wide range of applications for detection of chemical and biological species. A sinusoidal grating (period of 500 nm and peak-to- valley height of 40 nm) was realized by Laser Interference Lithography (LIL) and replicated onto a polymeric

A. Sonato; G. Ruffato; M. Natali; G. Zacco; M. Morpurgo; D. Silvestri; M. Dettin; F. Romanato

2011-01-01

487

Photoconductive nanocomposite polymers and devices  

Microsoft Academic Search

Photoconductive conjugated polymers have attracted much research interest because of their potential for fabrication of flexible, large area, and low cost optoelectronic devices, such as photodetectors, photoelectrochemical cells, photoelectrochromic windows and displays, photovoltaic cells, and electrophotographic receptors. This research is exploring the synthesis of novel donor\\/acceptor nanocomposite polymers with enhanced photoconductive properties, characterization of the nanoscale morphology and photoelectronic properties

Shujian Yi

2001-01-01

488

Radiation Effects in GMR Devices  

NASA Astrophysics Data System (ADS)

Current information technology relies heavily on magnetic materials via GMR read heads and magnetic random access memory (MRAM). The presumption is that these materials are radiation hard with respect to both photons and particles, potentially indicating utility for nuclear energy and space based applications. However, to date there are few detailed studies of magnetism in GMR devices in radioactive environments. This work explores the effects of gamma ray and neutron irradiation on GMR multilayers. The layer structure used in this experiment is Py/Cu/Py/FeMn/Ge. To study the effects of radiation three probes of magnetization, VSM, MR, and MOKE, are correlated pre and post radiation. We present characterization of the devices for multiple device geometries and doses up to 50Mrad for gamma rays and a minimum fast flux of (En>0.5MeV) of 6.3E12 nv for neutrons, both of which are well above the failure threshold for radiation-hard semiconducting devices.

Carroll, Turhan; Parks, S. C.; Hauser, A.; Robinette, C.; Lucy, J.; Pelekhov, D.; Hammel, P. C.; Yang, F. Y.; Johnston-Halperin, E.; Talnagi, J.; Blue, T.; Mathis, J. P.

2010-03-01

489

21 CFR 874.1600 - Olfactory test device.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 2009-04-01 false Olfactory test device. 874.1600 Section 874...DEVICES Diagnostic Devices § 874.1600 Olfactory test device. (a) Identification . An olfactory test device is used to determine...

2009-04-01

490

21 CFR 874.1600 - Olfactory test device.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Olfactory test device. 874.1600 Section 874...DEVICES Diagnostic Devices § 874.1600 Olfactory test device. (a) Identification . An olfactory test device is used to determine...

2010-04-01

491

21 CFR 892.2010 - Medical image storage device.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Medical image storage device. 892.2010 Section 892...Diagnostic Devices § 892.2010 Medical image storage device. (a) Identification. A medical image storage device is a device that...

2010-04-01

492

21 CFR 886.4360 - Ocular surgery irrigation device.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Ocular surgery irrigation device. 886.4360 Section...Surgical Devices § 886.4360 Ocular surgery irrigation device. (a) Identification. An ocular surgery irrigation device is a device...

2010-04-01

493

21 CFR 895.21 - Procedures for banning a device.  

Code of Federal Regulations, 2010 CFR

...Procedures for banning a device. 895.21 Section...SERVICES (CONTINUED) MEDICAL DEVICES BANNED DEVICES General...make a device a banned device, the Commissioner of...the Commissioner) may consult with the panel...

2010-04-01

494

21 CFR 895.21 - Procedures for banning a device.  

Code of Federal Regulations, 2010 CFR

...Procedures for banning a device. 895.21 Section...SERVICES (CONTINUED) MEDICAL DEVICES BANNED DEVICES General...make a device a banned device, the Commissioner of...the Commissioner) may consult with the panel...

2009-04-01

495

21 CFR 882.1620 - Intracranial pressure monitoring device.  

Code of Federal Regulations, 2013 CFR

...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Diagnostic Devices...monitoring device is a device used for short-term monitoring and recording of intracranial pressures and pressure trends. The...

2013-04-01

496

21 CFR 882.4250 - Cryogenic surgical device.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Cryogenic surgical device. 882.4250 Section 882.4250...DEVICES NEUROLOGICAL DEVICES Neurological Surgical Devices § 882.4250 Cryogenic surgical device. (a) Identification. A...

2013-04-01

497

21 CFR 892.1670 - Spot-film device.  

Code of Federal Regulations, 2013 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.1670 Spot-film device. (a) Identification. A spot-film device...

2013-04-01

498

Unique device identification system. Final rule.  

PubMed

The Food and Drug Administration (FDA) is issuing a final rule to establish a system to adequately identify devices through distribution and use. This rule requires the label of medical devices to include a unique device identifier (UDI), except where the rule provides for an exception or alternative placement. The labeler must submit product information concerning devices to FDA's Global Unique Device Identification Database (GUDID), unless subject to an exception or alternative. The system established by this rule requires the label and device package of each medical device to include a UDI and requires that each UDI be provided in a plain-text version and in a form that uses automatic identification and data capture (AIDC) technology. The UDI will be required to be directly marked on the device itself if the device is intended to be used more than once and intended to be reprocessed before each use. PMID:24066364

2013-09-24

499

16 CFR 1507.9 - Toy smoke devices and flitter devices.  

Code of Federal Regulations, 2010 CFR

...HAZARDOUS SUBSTANCES ACT REGULATIONS FIREWORKS DEVICES § 1507.9 Toy smoke devices...and flitter devices shall not be of such color and configuration so as to be confused with banned fireworks such as M-80 salutes, silver...

2009-01-01

500

16 CFR 1507.9 - Toy smoke devices and flitter devices.  

Code of Federal Regulations, 2010 CFR

...HAZARDOUS SUBSTANCES ACT REGULATIONS FIREWORKS DEVICES § 1507.9 Toy smoke devices...and flitter devices shall not be of such color and configuration so as to be confused with banned fireworks such as M-80 salutes, silver...

2010-01-01