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1

Measured performance of a 1089 K (1500 deg F) heat storage device for sun-shade orbital missions  

NASA Technical Reports Server (NTRS)

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. Excess solar energy during a sun period is stored as heat of fusion of lithium fluoride. The niobium - 1% zirconium tubes accommodate the 23 percent volume decrease of LiF during freezing. Test results showed slight, local distortions. The gas discharge temperature varied from 16 K (29 F) below to 28 K (50 F) above the nominal value of 1089 K (1500 F). The tube surface temperatures ranged from 1039 K (1410 F) to 1183 K (1670 F).

Namkoong, D.

1972-01-01

2

Sun/shade conditions affect recruitment and local adaptation of a columnar cactus in dry forests  

PubMed Central

Background and Aims Facilitation among plants in water-limited environments (i.e. where evapotranspiration overcomes the availability of water during the growing season) has been considered a local adaptation to water and light conditions. Among cacti, early life-history stages can benefit from the facilitative effects of nurse plants that reduce solar radiation and water stress. However, whether light condition itself acts as an agent of selection through facilitation remains untested. The aim of this study was to determine (1) whether light conditions affect seedling recruitment, (2) whether the positive effect of shade on seedling recruitment is more intense under more stressful conditions and (3) whether shade condition (facilitation) reduces the magnitude of local adaptation on seedling recruitment relative to full sunlight conditions. Methods A reciprocal transplant experiment, coupled with the artificial manipulation of sun/shade conditions, was performed to test for the effects of local adaptation on germination, seedling survival and growth, using two demes of the columnar cactus Pilosocereus leucocephalus, representing different intensities of stressful conditions. Key Results Full sunlight conditions reduced recruitment success and supported the expectation of lower recruitment in more stressful environments. Significant local adaptation was mainly detected under full sunlight conditions, indicating that this environmental factor acts as an agent of selection at both sites. Conclusions The results supported the expectation that the magnitude of local adaptation, driven by the effects of facilitative nurse plants, is less intense under reduced stressful conditions. This study is the first to demonstrate that sun/shade conditions act as a selective agent accounting for local adaptation in water-limited environments, and that facilitation provided by nurse plants in these environments can attenuate the patterns of local adaptation among plants benefiting from the nurse effect.

Miranda-Jacome, Antonio; Montana, Carlos; Fornoni, Juan

2013-01-01

3

A Venetian Excursion  

Microsoft Academic Search

On his annual visits to Italy, which began during his teens, John Ruskin was influenced by the Romantic vision of Venice. Despite this, he soon looked for critical objectivity and eventually dismissed his Venetian studies as “bye-work” He turned instead to nearby Verona, which had already featured in The Stones of Venice (1851–53). The city's Romanesque and Gothic churches, its

Clive Wilmer

2009-01-01

4

'Venetian blinds' artifact in dermatohistopathology  

PubMed Central

The ‘Venetian blinds’ artifact is an uncommon tissue cutting artifact that leads to the formation of parallel series of strips of tissue separated from one another by narrow clear spaces. It has been attributed to either hardening of the tissue in the paraffin block or defective assembly of the microtome knife. This artifact occurs in both inflammatory and neoplastic conditions in which there are nodular collections of cells and may reflect vibration-induced disintegration of fragile cellular aggregates that lack dermal stromal support. At scanning magnification, it serves to draw the histopathologist's eye to the site of pathology.

Joshi, Rajiv

2012-01-01

5

Retractable Sun Shade  

NASA Technical Reports Server (NTRS)

Window-shade type spring roller contains blanket, taken up by rotating cylindrical frame and held by frame over area to be shaded. Blanket made of tough, opaque polyimide material. Readily unfurled by mechanism to protect space it encloses from Sun. Blanket forms arched canopy over space and allows full access to it from below. When shading not needed, retracted mechanism stores blanket compactly. Developed for protecting sensitive Space Shuttle payloads from direct sunlight while cargo-bay doors open. Adapted to shading of greenhouses, swimming pools, and boats.

Frank, A.; Derespinis, S. F.; Mockovciak, John, Jr.

1986-01-01

6

78 FR 53817 - Culturally Significant Objects Imported for Exhibition Determinations: “Venetian Glass by Carlo...  

Federal Register 2010, 2011, 2012, 2013

...Culturally Significant Objects Imported for Exhibition Determinations: ``Venetian Glass...that the objects to be included in the exhibition ``Venetian Glass by Carlo Scarpa...imported from abroad for temporary exhibition within the United States, are of...

2013-08-30

7

INTERIOR DETAIL, RETRACTABLE WINDOW SHUTTERS, VENETIAN WINDOW IN THE SOUTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

INTERIOR DETAIL, RETRACTABLE WINDOW SHUTTERS, VENETIAN WINDOW IN THE SOUTHEAST CABINET. (NOTE THE MIRRORED PANEL IN THE FORWARD SHUTTER?S LOWER SECTION. DURING THE HAMILTONIAN OCCUPANCY, MIRRORS LIKE THESE WERE USED LIBERALLY THROUGHOUT THE HOUSE?S PUBLIC ROOMS - The Woodlands, 4000 Woodlands Avenue, Philadelphia, Philadelphia County, PA

8

Objectively measured physical activity levels of Venetian adults.  

PubMed

Aim: Venice, Italy, provides a unique environment to study physical activity as there are no automobiles, and walking is the most common means of transportation. The purpose of the present investigation was to objectively assess the physical activity (PA) levels of residents in Venice, Italy, using an accelerometer. Methods: Twenty-seven Venetians (12 men and 15 women, 48±16 yr, 169.4±6.6 cm, 71.7±11.1 kg) had worn an accelerometer (Lifecorder Ex) for 7 consecutive days in order to determine daily number of steps, time spent in light (LPA), moderate (MPA), or vigorous intensity (VPA) and moderate to vigorous intensity (MVPA) as well as energy expenditure associated with PA (PAEE). The time for all PA and MVPA lasting at least 1 minute, 3 minutes, 5 minutes and 10 minutes were also assessed. Results: The PAEE, number of steps, LPA, MPA, VPA and MVPA averaged over 7 days of week were 1575±524 kJ?day-1, 11920±3667 steps?day-1, 77±23 min?day-1 43±19 min?day-1, and 45±21 min?day-1. The time for MVPA lasting >10 min was 0.3±0.9 min?day-1. Conclusion: The amount and intensity of PA in Venetian adults is substantially higher than in most other populations previously evaluated, particularly American adults. The effects of the highly active Venetian lifestyle on important health outcomes remain unclear, but warrant further investigation. PMID:24247191

Ayabe, M; Brubaker, P H; Sunami, Y; Musci, R; Kumahara, H; Schutz, Y; Tanaka, H

2013-12-01

9

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

Code of Federal Regulations, 2013 CFR

...100.908 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.908 Charlevoix Venetian Night Boat Parade; Charlevoix, MI. (a)...

2013-07-01

10

Solar heat gain coefficient of complex fenestrations with a venetian blind for differing slat tilt angles  

SciTech Connect

Measured bidirectional transmittances and reflectances of a buff-colored venetian blind together with a layer calculation scheme developed in previous publications are utilized to produce directional-hemispherical properties for the venetian blind layer and solar heat gain coefficients for the blind in combination with clear double glazing. Results are presented for three blind slat tilt angles and for the blind mounted either interior to the double glazing or between the glass panes. Implications of the results for solar heat gain calculations are discussed in the context of sun positions for St. Louis, MO.

Klems, J.H.; Warner, J.L.

1996-08-01

11

The Venetian lazarettos of Candia and the Great Plague (1592 - 1595).  

PubMed

The present study highlights the history of lazarettos in Candia (modern Heraklion, Crete, Greece), which was the most important Venetian possession in the Mediterranean at the time, while at the same time it recounts the terrible plague which went down in history as the Great Plague of Candia (1592-1595). The study will also attempt to give a satisfactory answer to the epidemiological questions raised by the worst epidemic that Crete had experienced since the era of the Black Death in the 14th century. The city was about to lose more than a half of its population (51.3%), although it was saved from complete annihilation by the composure, courage and inventiveness of its Venetian commander, Filippo Pasqualigo, whose report to the Venetian Senate makes an invaluable source of information regarding the events of this dramatic period. Candia would also witness the emergence of typical human reactions in cases of epidemics and mass deaths, such as running away along with the feeling of self-preservation, dissolute life and ephemeral pleasures, as well as lawlessness and criminality. The lazaretto proved inefficient in the face of a disaster of such scale, whereas the epidemic functioned as a "crash-test" for the Venetian health system. Eventually, in an era when the microbial nature of the disease was unknown, it seems that it was practically impossible to handle emergency situations of large-scale epidemics successfully, despite strict laws and well-organized precautionary health systems. PMID:24651095

Tsiamis, Costas; Thalassinou, Eleni; Poulakou-Rebelakou, Effie; Tsakris, Athanasios; Hatzakis, Angelos

2014-03-01

12

Energy performance assessment of a window with a horizontal Venetian blind  

Microsoft Academic Search

This study examines the effects of the presence of a Venetian blind on the thermal performance of a window. The blind is positioned adjacent to the indoor surface of either a single or double glazed window and the coupled convection and radiation heat transfer problem is solved using a two-dimensional finite volume model. The numerical model is validated with published

Hidayat Shahid; David Naylor

2005-01-01

13

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

14

Energy conservation through interior shading of windows: an analysis, test, and evaluation of reflective venetian blinds  

SciTech Connect

Windows admit radiant and conducted heat energy as well as light and, for this reason, effective means for control is mandatory. Venetian blinds, providing continuous solar control, are ideal for energy efficient windows. They may be closed in the summer to block out undesirable solar radiation and opened in the winter to admit the valuable energy of the sun while providing year-round glare free illumination. Architects, engineers, and manufacturers have been reluctant to promote the use of venetian blinds as energy saving products because of remaining uncertainties in the technology. This cooperative program involving industry, government, and a university research team has developed predictive equations and has confirmed their ability to accurately predict shading coefficients through experiments in an environmental simulator with an artificial sun. Ten venetian blinds with a wide range of surface finishes, including gloss and Satin finish paints, polished aluminum, chrome deposition, and units with different colors on the upper and lower surfaces of the slats were included in the experimental work. The effect of solar incidence and slat angle on blind reflectance and shading coefficient was determined. The impact of varying incidence and slat angle on building energy load is discussed.

Van Dyck, R.L.; Konen, T.P.

1982-03-01

15

Venetian Rule and Control of Plague Epidemics on the Ionian Islands during 17th and 18th Centuries  

PubMed Central

During the 17th and 18th centuries, measures were taken by the Venetian administration to combat plague on the Ionian Islands. At that time, although the scientific basis of plague was unknown, the Venetians recognized its infectious nature and successfully decreased its spread by implementing an information network. Additionally, by activating a system of inspection that involved establishing garrisons along the coasts, the Venetians were able to control all local movements in plague-infested areas, which were immediately isolated. In contrast, the neighboring coast of mainland Greece, which was under Ottoman rule, was a plague-endemic area during the same period. We conclude that even in the absence of scientific knowledge, close observation and social and political measures can effectively restrain infectious outbreaks to the point of disappearance.

Konstantinidou, Katerina; Mantadakis, Elpis; Sardi, Thalia; Samonis, George

2009-01-01

16

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

17

The venetian-blind effect: a preference for zero disparity or zero slant?  

PubMed Central

When periodic stimuli such as vertical sinewave gratings are presented to the two eyes, the initial stage of disparity estimation yields multiple solutions at multiple depths. The solutions are all frontoparallel when the sinewaves have the same spatial frequency; they are all slanted when the sinewaves have quite different frequencies. Despite multiple solutions, humans perceive only one depth in each visual direction: a single frontoparallel plane when the frequencies are the same and a series of small slanted planes—Venetian blinds—when the frequencies are quite different. These percepts are consistent with a preference for solutions that minimize absolute disparity or overall slant. The preference for minimum disparity and minimum slant are identical for gaze at zero eccentricity; we dissociated the predictions of the two by measuring the occurrence of Venetian blinds when the stimuli were viewed in eccentric gaze. The results were generally quite consistent with a zero-disparity preference (Experiment 1), but we also observed a shift toward a zero-slant preference when the edges of the stimulus had zero slant (Experiment 2). These observations provide useful insights into how the visual system constructs depth percepts from a multitude of possible depths.

Vlaskamp, Bjorn N. S.; Guan, Phillip; Banks, Martin S.

2013-01-01

18

Seismicity and velocity structures along the south-Alpine thrust front of the Venetian Alps (NE-Italy)  

Microsoft Academic Search

In this paper we show the seismicity and velocity structure of a segment of the Alpine retro-belt front along the continental collision margin of the Venetian Alps (NE Italy). Our goal is to gain insight on the buried structures and deep fault geometry in a “silent” area, i.e., an area with poor instrumental seismicity but high potential for future earthquakes,

M. Anselmi; A. Govoni; P. De Gori; C. Chiarabba

19

Assessing transmissivity from specific capacity in an alluvial aquifer in the middle Venetian plain (NE Italy).  

PubMed

Defining aquifer permeability distribution accurately over large areas is often debated in hydrogeology. The operational efforts to calculate hydraulic conductivity with classical aquifer tests are significant; however, accurate knowledge of permeability areal distribution is fundamental both from a hydrogeological and a modeling standpoint. This paper presents an empirical relationship between the transmissivity (T) and the specific capacity (SC) values obtained from experimental aquifer and well tests. All experimental values were obtained from 50 mm wells in middle Venetian plain artesian gravel aquifers. Many other authors have presented empirical relationships between T and SC, but most are related to fissured/karst aquifers, and only a few concern alluvial porous aquifers. Analysis of the T vs. SC relationship standardized residuals shows that a linear relationship produces statistically significant normal residuals compared with an exponential relationship. PMID:23656943

Fabbri, Paolo; Piccinini, Leonardo

2013-01-01

20

Wind-tunnel investigation of an NACA 23012 airfoil with 30 percent-chord venetian-blind flaps  

NASA Technical Reports Server (NTRS)

Report presents the results of an investigation made in the NACA 7 by 10-foot wind tunnel of a NACA 23012 airfoil with 30-percent-chord venetian-blind flaps having one, two, three, and four slats of Clark y section. The three-slat arrangements was aerodynamically the best of those tested but showed practically no improvement over the comparable arrangement used in the preliminary tests published in NACA Technical Report No. 689. The multiple-slat flaps gave slightly higher lift coefficients than the one-slat (Fowler) flap but gave considerably greater pitching-moment coefficients. An analysis of test data indicates that substitution of a thicker and more cambered section for the Clark y slats should improve the aerodynamic and the structural characteristics of the venetian-blind flap.

Rogallo, F M; Spano, Bartholomew S

1942-01-01

21

Expression of 8-OHdG in Zosterisessor ophiocephalus from the Venetian lagoon, Italy  

PubMed Central

The aim of the present work was to evaluate the expression of 8-OHdG (8-hydroxy-2'-deoxyguanosine) in the benthic fish Zosterisessor ophiocephalus collected in two differently polluted sites of the Venetian lagoon (Porto Marghera and Caroman). We compared our data on 8-OHdG with those of CYP1A (Cytochrome P450, family 1, subfamily A, polypeptide 1), which is a well known biomarker for detoxification of contaminants. Immunohistochemistry with an antibody to 8-OHdG showed immunopositivity in nuclei of hepatocytes as well as in melanomacrophage centres of spleen and kidney, whereas an anti-CYP1A antibody exhibited positive immunostaining in the liver, kidney and ovary. The liver of males showed higher expression of both proteins than females. In animals from Porto Marghera site, the enzymatic assay for 8-OHdG exhibited higher levels in liver of males than in females. Western Blot analysis using the antibody anti-CYP1A recognized the presence of a band of about 60 kDa in the liver of males and females. Males exhibited a strong band, whereas in females the band showed a lower intensity. By using Real-Time PCR, the mRNA expression of CYP1A did not show any differences between males and females from each site, but it was at borderline significance level. Comparing the two sites, mRNA expression of CYP1A was significantly higher in the liver of both males and females from Porto Marghera than that of Caroman. The present data suggest that pollutants are bio-available as demonstrated by our biomarker analyses and may have a harmful effect on aquatic organisms such as Z. ophiocephalus. We report that the highest levels of hepatic 8-OHdG and CYP1A expression were detected in males, showing clear gender specificity.

Negrato, E.; Vascellari, M.; Capolongo, F.; Binato, G.; Da Dalt, L.; Boscolo Papo, M.; Gioacchini, G.; Carnevali, O.; Bertotto, D.; Radaelli, G.; Pascoli, F.

2013-01-01

22

A numerical study of free convective heat transfer in a double-glazed window with a between-pane Venetian blind  

Microsoft Academic Search

The free convective heat transfer in a double-glazed window with a between-pane Venetian blind has been studied numerically. The model geometry consists of a two-dimensional vertical cavity with a set of internal slats, centred between the glazings. Approximately 700 computational fluid dynamic solutions were conducted, including a grid sensitivity study. A wide set of geometrical and thermo-physical conditions was considered.

Tony Avedissian

2006-01-01

23

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

24

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

25

Integrated evaluation of environmental parameters influencing Vibrio occurrence in the coastal Northern Adriatic Sea (Italy) facing the Venetian lagoon.  

PubMed

In the marine environment, the persistence and abundance of Vibrio are related to a number of environmental parameters. The influence of the different environmental variables in determining the Vibrio occurrence could be different in the specific geographic areas around the world. Moreover, oceanographic parameters are generally interdependent and should not be considered separately when their influence on bacterial presence and concentration is tested. In this study, an integrated approach was used to identify key parameters determining the abundance of Vibrio spp in marine samples from the Venetian Lagoon in Italy, which is an important area for fish farming and tourism. Multivariate techniques have been adopted to analyze the dataset: using PCA, it was shown that a relatively high proportion of the total variance in this area was mainly due to two independent variables, namely salinity and temperature. Using cluster analysis, it was possible to categorize different groups with homogeneous features as regards space ("stations") and time ("seasons") distribution, as well as to quantify the values of environmental variables and the Vibrio abundances in each category. Furthermore, integrating key environmental factors and bacterial concentration values, it was possible to identify levels of salinity and sea surface temperature which were optimal for Vibrio concentration in water, plankton, and sediment samples. The identification of key environmental variables conditioning Vibrio occurrence should facilitate ocean monitoring, making it possible to predict unexpected variations in marine microflora which determine possible public health risks in coastal areas. PMID:21826491

Caburlotto, Greta; Bianchi, Franco; Gennari, Micol; Ghidini, Valentina; Socal, Giorgio; Aubry, Fabrizio Bernardi; Bastianini, Mauro; Tafi, Mariacarla; Lleo, Maria M

2012-01-01

26

Seismicity and velocity structures along the south-Alpine thrust front of the Venetian Alps (NE-Italy)  

NASA Astrophysics Data System (ADS)

In this paper we show the seismicity and velocity structure of a segment of the Alpine retro-belt front along the continental collision margin of the Venetian Alps (NE Italy). Our goal is to gain insight on the buried structures and deep fault geometry in a "silent" area, i.e., an area with poor instrumental seismicity but high potential for future earthquakes, as indicated by historical earthquakes (1695 Me = 6.7 Asolo and 1936 Ms = 5.8 Bosco del Cansiglio). Local earthquakes recorded by a dense temporary seismic network are used to compute 3-D Vp and Vp/Vs tomographic images, yielding well resolved images of the upper crust underneath the south-Alpine front. We show the presence of two main distinct high Vp S-verging thrust units, the innermost coincides with the piedmont hill and the outermost is buried under a thick pile of sediments in the Po plain. Background seismicity and Vp/Vs anomalies, interpreted as cracked fluid-filled volumes, suggest that the NE portion of the outermost blind thrust and its oblique/lateral ramps may be a zone of high fluid pressure prone to future earthquakes. Three-dimensional focal mechanisms show compressive and transpressive solutions, in agreement with the tectonic setting, stress field maps and geodetic observations. The bulk of the microseismicity is clustered in two different areas, both in correspondence of inherited lateral ramps of the thrust system. Tomographic images highlight the influence of the paleogeographic setting in the tectonic style and seismic activity of the region.

Anselmi, M.; Govoni, A.; De Gori, P.; Chiarabba, C.

2011-12-01

27

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

28

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?˛ ?s?ą]; 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

2013-10-01

29

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

30

Sealing device  

DOEpatents

A sealing device for sealing a gap between a dovetail of a bucket assembly and a rotor wheel is disclosed. The sealing device includes a cover plate configured to cover the gap and a retention member protruding from the cover plate and configured to engage the dovetail. The sealing device provides a seal against the gap when the bucket assemply is subjected to a centrifugal force.

Garcia-Crespo, Andres Jose

2013-12-10

31

Sliding device  

US Patent & Trademark Office Database

A sliding device provides a binding-free apparatus suitable for trick and other riding on snow, sand, ice and other surfaces. An elongated deck to support the rider is elevated from and attached to an elongated runner, which provides a surface that slides on the snow, sand, etc. The runner may be made more narrow than the deck to provide leverage for the rider to tilt the device onto an edge of the runner to steer the device. The device may not have any defined front or back portion and thus be adapted for riding in either direction.

2005-03-15

32

Closure device  

Microsoft Academic Search

A closure device connectible to a well head through which the polished rod of a rod string extends into a well tubing for operating pump means for moving well fluids to a surface flow conductor, the closure device having a tubular ram provided with a packing or plug for closing an annular passage between the polished rod and a tubular

Sable

1985-01-01

33

Hydrokinetic device  

Microsoft Academic Search

A hydrokinetic device is comprised of a fluid containing housing and unique relatively rotatable wheel means, including an impeller wheel connected to an input shaft and a turbine wheel connected to an output shaft. With the addition of a stator wheel, the device may provide torque multiplication between the shafts, or without the stator may be used to couple the

H. L. Cottrell; A. C. Mamo

1976-01-01

34

Analog Device.  

National Technical Information Service (NTIS)

The object of the invention is an analog device containing a generator of incremental rectangular pulses, a generator of high frequency, an equalizing device and a switch. Magnetic analog memory elements joined with a switch which connects them in turn to...

B. V. Bolotov A. E. Dorogov K. A. Ogurtsov

1966-01-01

35

Gripping device  

NASA Technical Reports Server (NTRS)

This invention relates to a gripping device, and more particularly to one with a large moment carrying capability for handling long workpieces of various diameters and which can be particularly used as an end effector on a robotic arm.

Parma, George F. (inventor)

1989-01-01

36

Device Performance  

SciTech Connect

In the Device Performance group, within the National Center for Photovoltaic's Measurements and Characterization Division, we measure the performance of PV cells and modules with respect to standard reporting conditions--defined as a reference temperature (25 C), total irradiance (1000 Wm-2), and spectral irradiance distribution (IEC standard 60904-3). Typically, these are ''global'' reference conditions, but we can measure with respect to any reference set. To determine device performance, we conduct two general categories of measurements: spectral responsivity (SR) and current versus voltage (I-V). We usually perform these measurements using standard procedures, but we develop new procedures when required by new technologies. We also serve as an independent facility for verifying device performance for the entire PV community. We help the PV community solve its special measurement problems, giving advice on solar simulation, instrumentation for I-V measurements, reference cells, measurement procedures, and anomalous results. And we collaborate with researchers to analyze devices and materials.

Not Available

2006-06-01

37

Device modeling  

NASA Technical Reports Server (NTRS)

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

1987-01-01

38

Microchannel devices  

SciTech Connect

The fabrication of stainless steel microchannel heat exchangers was examined through microlamination, the process of diffusion bonding precision machined metallic foils. The influence of diffusion bonding parameters, as well as the device geometry on the strength of the bond between the foils and embedded channel integrity, was investigated. During diffusion bonding, high temperatures and/or pressures result in well bonded foils, but these conditions cause the embedded channels to deform, which will degrade the efficiency of fluid flow through the channels. Alternatively, low temperatures and/or pressures result in undeformed channels but weakly bonded foils. This causes failure of the device due to fluid leakage. Thus, a processing envelope exists for producing a sound device with no fluid leakage and no degradation of fluid flow properties. The theoretical limit on aspect ratio within two-fluid counter-flow microchannel heat exchangers was also investigated. A counter-flow device is comprised of alternating layers of microchannels, which allow the two fluids to flow in opposite directions separated by fins. A theoretical model for interpreting the span of the fin as a function of the fin thickness was established. The model was verified experimentally by fabricating specimens to simulate the counter-flow device. The results of these investigations were used to aid in the design and processing of prototype microchannel devices.

Alman, David E.; Wilson, Rick D.

2001-09-01

39

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

40

Device Modeling.  

National Technical Information Service (NTIS)

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 acces...

R. Schwartz

1987-01-01

41

Electrochemical device  

DOEpatents

A tunnel protected electrochemical device features channels fluidically communicating between manifold, tunnels and cells. The channels are designed to provide the most efficient use of auxiliary power. The channels have a greater hydraulic pressure drop and electrical resistance than the manifold. This will provide a design with the optimum auxiliary energy requirements.

Grimes, Patrick G. (Westfield, NJ); Einstein, Harry (Springfield, NJ); Bellows, Richard J. (Westfield, NJ)

1988-01-12

42

Detection device  

DOEpatents

The present invention is directed to a detection device comprising: (1) an entrance chamber, (2) a central chamber, and (3) an exit chamber. The central chamber includes an ionizing gas, anode, and means for connecting the anode with an external power supply and pulse counter.

Smith, Jay E. (Pittsburgh, PA)

1984-01-01

43

Laser device  

DOEpatents

A laser device includes a virtual source configured to aim laser energy that originates from a true source. The virtual source has a vertical rotational axis during vertical motion of the virtual source and the vertical axis passes through an exit point from which the laser energy emanates independent of virtual source position. The emanating laser energy is collinear with an orientation line. The laser device includes a virtual source manipulation mechanism that positions the virtual source. The manipulation mechanism has a center of lateral pivot approximately coincident with a lateral index and a center of vertical pivot approximately coincident with a vertical index. The vertical index and lateral index intersect at an index origin. The virtual source and manipulation mechanism auto align the orientation line through the index origin during virtual source motion.

Scott, Jill R. (Idaho Falls, ID) [Idaho Falls, ID; Tremblay, Paul L. (Idaho Falls, ID) [Idaho Falls, ID

2008-08-19

44

Semiconductor devices  

US Patent & Trademark Office Database

In an embodiment, a semiconductor device is provided. The semiconductor device may include a substrate having a main processing surface, a first source/drain region comprising a first material of a first conductivity type, a second source/drain region comprising a second material of a second conductivity type, wherein the second conductivity type is different from the first conductivity type, a body region electrically coupled between the first source/drain region and the second source/drain region, wherein the body region extends deeper into the substrate than the first source/drain region in a first direction that is perpendicular to the main processing surface of the substrate, a gate dielectric disposed over the body region, and a gate region disposed over the gate dielectric, wherein the gate region overlaps with at least a part of the first source/drain region and with a part of the body region in the first direction.

2013-03-26

45

Lighting device  

US Patent & Trademark Office Database

A lighting device with at least one first-element that emits visible light at a wavelength and irradiance sufficient to inactivate one or more pathogenic bacterial species, and at least one second element that emits light of one or more longer wave-lengths to that of the first-element. The at least one second element has a higher illuminance than that of the at least one inactivating element or component.

2013-03-19

46

Electrooptical devices  

NASA Astrophysics Data System (ADS)

This report covers work carried out with support of the Department of the Air Force during the period 1 October 1979 through 31 March 1980. A part of this support was provided by the Rome Air Development Center. CW operation at temperatures up to 55 C has been achieved for GaInAsP/InP double-heterostructure (DH) lasers emitting at 1.5 micrometers, which were grown without a GaInAsP buffer layer. These devices are of interest for use as sources in fiber-optics communications systems, since the lowest transmission loss reported for fused-silica optical fibers occurs at 1.55 micrometers. Surface passivation techniques developed for InP and GaInAsP avalanche photodiodes have resulted in reductions of dark current as large as four orders of magnitude, to values as low as .0000016 A/sq cm at 0.9 V(b) where V(b) is the breakdown voltage. Devices consisting entirely of InP have been passivated with plasma-deposited Si3N4, and those with a GaInAsP layer but with the p-n junction in InP have been passivated with polyimide. Neither of these techniques successfully reduces dark currents in devices with the p-n junction in the GaInAsP, but a film of photoresist sprayed with SF6 as the propellant has given excellent results. The electrical characteristics in InP ion implanted with Sn, Ge, Si, and C have been investigated. All of these column IV elements yielded n-type conductivity and Sn, Ge, and Si showed high electrical activation; however, implanted C was found to have a net electrical activation of only about 5 percent.

Hurwitz, C. E.

1980-03-01

47

Electrochromic device  

DOEpatents

An electrochromic device includes a first substrate spaced from a second substrate. A first conductive member is formed over at least a portion of the first substrate. A first electrochromic material is formed over at least a portion of the first conductive member. The first electrochromic material includes an organic material. A second conductive member is formed over at least a portion of the second substrate. A second electrochromic material is formed over at least a portion of the second conductive member. The second electrochromic material includes an inorganic material. An ionic liquid is positioned between the first electrochromic material and the second electrochromic material.

Schwendemanm, Irina G. (Wexford, PA) [Wexford, PA; Polcyn, Adam D. (Pittsburgh, PA) [Pittsburgh, PA; Finley, James J. (Pittsburgh, PA) [Pittsburgh, PA; Boykin, Cheri M. (Kingsport, TN) [Kingsport, TN; Knowles, Julianna M. (Apollo, PA) [Apollo, PA

2011-03-15

48

Electrospray device  

NASA Technical Reports Server (NTRS)

An electrospray device includes an electrospray emitter adapted to receive electrospray fluid; an extractor plate spaced from the electrospray emitter and having at least one aperture; and a power supply for applying a first voltage between the extractor plate and emitter for generating at least one Taylor cone emission through the aperture to create an electrospray plume from the electrospray fluid, the extractor plate as well as accelerator and shaping plates may include a porous, conductive medium for transporting and storing excess, accumulated electrospray fluid away from the aperture.

Demmons, Nathaniel (Inventor); Martin, Roy (Inventor); Hruby, Vladimir (Inventor); Roy, Thomas (Inventor); Spence, Douglas (Inventor); Ehrbar, Eric (Inventor); Zwahlen, Jurg (Inventor)

2011-01-01

49

OLED devices  

DOEpatents

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

50

Electroexplosive device  

NASA Technical Reports Server (NTRS)

An electroexplosive device is presented which employs a header having contact pins hermetically sealed with glass passing through from a connector end of the header to a cavity filled with a shunt layer of a new nonlinear resistive composition and a heat-sink layer of a new dielectric composition having good thermal conductivity and capacity. The nonlinear resistive layer and the heat-sink layer are prepared from materials by mixing with a low temperature polymerizing resin. The resin is dissolved in a suitable solvent and later evaporated. The resultant solid composite is ground into a powder, press formed into the header and cured (polymerized) at about 250 to 300 F.

Menichelli, V. J. (inventor)

1978-01-01

51

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

52

Electrophoresis device  

NASA Technical Reports Server (NTRS)

A device for separating cellular particles of a sample substance into fractionated streams of different cellular species includes a casing having a distribution chamber, a separation chamber, and a collection chamber. The electrode chambers are separated from the separation chamber interior by means of passages such that flow variations and membrane variations around the slotted portion of the electrode chamber do not enduce flow perturbations into the laminar buffer curtain flowing in the separation chamber. The cellular particles of the sample are separated under the influence of the electrical field and the separation chamber into streams of different cellular species. The streams of separated cells enter a partition array in the collection chamber where they are fractionated and collected.

Rhodes, P. H.; Snyder, R. S. (inventors)

1982-01-01

53

Laser device  

DOEpatents

A laser device includes a target position, an optical component separated a distance J from the target position, and a laser energy source separated a distance H from the optical component, distance H being greater than distance J. A laser source manipulation mechanism exhibits a mechanical resolution of positioning the laser source. The mechanical resolution is less than a spatial resolution of laser energy at the target position as directed through the optical component. A vertical and a lateral index that intersect at an origin can be defined for the optical component. The manipulation mechanism can auto align laser aim through the origin during laser source motion. The laser source manipulation mechanism can include a mechanical index. The mechanical index can include a pivot point for laser source lateral motion and a reference point for laser source vertical motion. The target position can be located within an adverse environment including at least one of a high magnetic field, a vacuum system, a high pressure system, and a hazardous zone. The laser source and an electro-mechanical part of the manipulation mechanism can be located outside the adverse environment. The manipulation mechanism can include a Peaucellier linkage.

Scott, Jill R. (Idaho Falls, ID); Tremblay, Paul L. (Idaho Falls, ID)

2007-07-10

54

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

55

ICU Devices and Procedures  

MedlinePLUS

... ICU Devices and Procedures | | More ICU Devices and Procedures Critical Care Clinical Education Critical Care Cases Ethics Links Journal Club Information for Patients Podcasts Procedures Research Refractory ARDS Statements & Guidelines Ventilator Waveform Analysis ...

56

Photonic Silicon Device Physics.  

National Technical Information Service (NTIS)

This program investigated the fundamental mechanisms involved in light emitting silicon structures, fabricated silicon based photonic devices, and examined the electrical device properties. The approach evolved into the study of three distinct areas of in...

S. D. Russell W. B. Dubbelday R. L. Shimabukuro P. R. DeLaHoussay

1995-01-01

57

Novel Magnetic Devices.  

National Technical Information Service (NTIS)

This project was dedicated to the development of novel magnetic devices relevant to applications in the fields of sensors, storage, non- volatile, reprogrammable spin-based electronics. The devices envisioned in this project explored novel physical phenom...

I. Schuller

2007-01-01

58

Input devices for CCDs  

NASA Astrophysics Data System (ADS)

A systematic account of the physical and network-engineering aspects of the operation and design of input devices for CCDs is presented with emphasis on the maximum possibilities of such devices with respect to the injection of small signals into the CCD. A classification of input devices is given. It is shown that a unified approach to input devices as devices that are based on transistor structures makes it possible to identify the properties and limitations of all types of input devices for CCDs. Particular consideration is given to potentials and charges of MOS cells, methods of signal injection, the concentration of charge carriers in the source and gate, and the volt-ampere characteristics of input devices. Equivalent circuits, modes of operation, and electric circuits of input devices are also considered

Trishenkov, M. A.; Vinetskii, Iu. R.

1982-12-01

59

Compensated Temperature Sensing Device.  

National Technical Information Service (NTIS)

A compensated temperature sensing device having a sensing element capable of surviving extreme operating environments while still being able to substantially instantaneously sense temperature changes. This is accomplished by incorporating within the devic...

A. S. Meyer

1980-01-01

60

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

61

Sealed container sampling device  

NASA Technical Reports Server (NTRS)

Sampling device, by means of a tapered needle, pierces a sealed container while maintaining the seal and either evacuates or pressurizes the container. This device has many applications in the chemical, preservative and battery-manufacturing industries.

Hennigan, T. J.

1969-01-01

62

Liquid Crystal Devices.  

National Technical Information Service (NTIS)

A study of the electrooptic properties of liquid crystals and their potential in several Navy device applications is described. Experimental work in the evaporation and sputtering of photoconductive films for the photoactivation of a liquid crystal device...

M. A. Monahan H. H. Caspers L. B. Stotts M. N. McLandrich

1973-01-01

63

Radiological Dispersion Device (RDD)  

MedlinePLUS

... considered far more likely than use of a nuclear explosive device. An RDD combines a conventional explosive ... knowledge to build and deploy compared to a nuclear device. Also, the radioactive materials in RDDs are ...

64

Compliant Walled Combustion Devices.  

National Technical Information Service (NTIS)

Combustion devices described herein comprise a compliant combustion chamber wall or segment. The compliant segment deforms during combustion in the combustion chamber. Some devices may include a compliant wall configured to stretch responsive to pressure ...

H. Prahlad J. Helm R. E. Pelrine S. Oh S. E. Stanford

2005-01-01

65

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

66

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) [Albuquerque, NM

1985-01-01

67

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

68

Pyrotechnic device technology  

Microsoft Academic Search

This talk was given at the 14th International Pyrotechnic Seminar on September 21, 1989, in Jersey, United Kingdom, as one of two plenary lectures. It briefly surveys the current technology of pyrotechnic devices and examines trends for the future. The pyrotechnic'' can have several meanings. In this talk, pyrotechnic devices'' are devices in which porous materials undergo reduction-oxidation reactions and

1989-01-01

69

Organic photosensitive devices  

DOEpatents

The present invention generally relates to organic photosensitive optoelectronic devices. More specifically, it is directed to organic photosensitive optoelectronic devices having a photoactive organic region containing encapsulated nanoparticles that exhibit plasmon resonances. An enhancement of the incident optical field is achieved via surface plasmon polariton resonances. This enhancement increases the absorption of incident light, leading to a more efficient device.

Rand, Barry P; Forrest, Stephen R

2013-11-26

70

Solar energy refrigeration device  

Microsoft Academic Search

The invention relates to a refrigeration device using solar energy. This device includes a refrigeration fluid, such as water, which circulates between the solar energy heat exchanger containing zeolite, and an evaporator located in a cooling chamber through a condenser, then return to the exchanger through a three way valve. The device includes a second channel in the exchanger, which

A. Wiart; G. Paeye

1985-01-01

71

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

72

Articulating feedstock delivery device  

DOEpatents

A fully articulable feedstock delivery device that is designed to operate at pressure and temperature extremes. The device incorporates an articulating ball assembly which allows for more accurate delivery of the feedstock to a target location. The device is suitable for a variety of applications including, but not limited to, delivery of feedstock to a high-pressure reaction chamber or process zone.

Jordan, Kevin

2013-11-05

73

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

74

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

75

Solid state devices  

NASA Technical Reports Server (NTRS)

The Solid State Device research program is directed toward developing innovative devices for space remote and in-situ sensing, and for data processing. Innovative devices can result from the standard structures in innovative materials such as low and high temperature superconductors, strained layer superlattices, or diamond films. Innovative devices can also result from innovative structures achieved using electron tunneling or nanolithography in standard materials. A final step is to use both innovative structures and innovative materials. A new area of emphasis is the miniaturization of sensors and instruments molded by using the techniques of electronic device fabrication to micromachine silicon into micromechanical and electromechanical sensors and actuators.

1991-01-01

76

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

77

Demystifying ventricular assist devices.  

PubMed

Many people throughout the world are living with heart disease and advanced heart failure. They may be in need of a heart transplant, but because of the limited amount of donor hearts available, other options need to be available. Because of the advancement of technology, there are now other options, and one option available would be a mechanical circulatory and cardiac support device. Ventricular assist devices (VADs) have been developed over the past 30 years. From larger, earlier pulsatile devices to smaller, hand-held, newer axial flow or rotary pump devices, VADs are implanted cardiac assist devices. They are implanted to provide cardiac support and can be used temporarily as a bridge to transplant (for those awaiting a heart transplant) or implanted permanently, which is known as destination therapy. With the changes in the size of device, decrease in the size of drive line, increased length of battery life, as well as length of device life, thousands of people now have these implanted VAD devices and are living quality lives and functioning at high levels. Currently, there are 3 generations of the left ventricular assist devices being used throughout the world. Five of the most well-known type of left ventricular assist devices are discussed in this article. PMID:21670618

Litton, Kimberley A

2011-01-01

78

Smart portable rehabilitation devices  

PubMed Central

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 can be designed to apply a form of tension to resist motion of the joint. These devices induce quicker recovery and are more effective at restoring proper biomechanics and improving muscle function. However, their shortcoming is in their inability to be adjusted in real-time, which is the most ideal form of a device for rehabilitation. This introduces a second class of devices beyond passive orthotics. It is comprised of "active" or powered devices, and although more complicated in design, they are definitely the most versatile. An active or powered orthotic, usually employs some type of actuator(s). Methods In this paper we present several new advancements in the area of smart rehabilitation devices that have been developed by the Northeastern University Robotics and Mechatronics Laboratory. They are all compact, wearable and portable devices and boast re-programmable, real time computer controlled functions as the central theme behind their operation. The sensory information and computer control of the three described devices make for highly efficient and versatile systems that represent a whole new breed in wearable rehabilitation devices. Their applications range from active-assistive rehabilitation to resistance exercise and even have applications in gait training. The three devices described are: a transportable continuous passive motion elbow device, a wearable electro-rheological fluid based knee resistance device, and a wearable electrical stimulation and biofeedback knee device. Results Laboratory tests of the devices demonstrated that they were able to meet their design objectives. The prototypes of portable rehabilitation devices presented here did demonstrate that these concepts are capable of the performance their commercially available but non-portable counterparts exhibit. Conclusion Smart, portable devices with the ability for real time monitoring and adjustment open a new era in rehabilitation where the recovery process could be dramatically improved.

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

2005-01-01

79

Barrier breaching device  

DOEpatents

A barrier breaching device that is designed primarily for opening holes in interior walls of buildings uses detonating fuse for explosive force. The fuse acts as the ribs or spokes of an umbrella-like device that may be opened up to form a cone. The cone is placed against the wall so that detonating fuse that rings the base of the device and which is ignited by the spoke-like fuses serves to cut a circular hole in the wall.

Honodel, C.A.

1983-06-01

80

Barrier breaching device  

DOEpatents

A barrier breaching device that is designed primarily for opening holes in interior walls of buildings uses detonating fuse for explosive force. The fuse acts as the ribs or spokes of an umbrella-like device that may be opened up to form a cone. The cone is placed against the wall so that detonating fuse that rings the base of the device and which is ignited by the spoke-like fuses serves to cut a circular hole in the wall.

Honodel, Charles A. (Tracy, CA)

1985-01-01

81

Disinfectants for medical devices  

Microsoft Academic Search

Until 1995 all disinfectants available on the Dutch market were\\u000aregistered under the Pesticides Act. With the introduction of the\\u000aMedical Device Directive in the Dutch law disinfectants specifically\\u000aintended for use on medical devices are considered as medical devices. \\u000aThese are CE marked by the manufacturer and freely marketed in the EU\\u000awithout the need for national approval. In

Bruijn APC de; Drongelen AW van; Peters-Volleberg GWM

2007-01-01

82

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

83

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

84

Pyrotechnic device technology  

SciTech Connect

This talk was given at the 14th International Pyrotechnic Seminar on September 21, 1989, in Jersey, United Kingdom, as one of two plenary lectures. It briefly surveys the current technology of pyrotechnic devices and examines trends for the future. The pyrotechnic'' can have several meanings. In this talk, pyrotechnic devices'' are devices in which porous materials undergo reduction-oxidation reactions and produce useful products. The pyrotechnic materials are generally fuel-oxidizer systems without binders, in contrast to primary or secondary explosives or propellants. The word pyrotechnic'' is often used to include explosive, squib, propellant, or other ordnance type devices, especially in the European community. The major need for pyrotechnic devices has always been military and defense; however, as technology advances, the civilian uses of pyrotechnics will continue to grow. If every automobile had a pyrotechnic device to trigger its air or crash bag, that application alone would mean millions of devices per year. Applications in safety, fire fighting, law enforcement, and other commercial applications are likely to increase due to the increased capability of pyrotechnic devices and the integration of such devices in system designs. 2 refs., 56 figs.

Wilcox, P.D.

1989-01-01

85

Semiconductor devices "from inside"  

PubMed

Operation of any semiconductor device can be presented by unique configuration of the electrical field (potential) and charge (doping) distribution within the device. More specifically, the status of operation is described by the quasi-Fermi energy (QFE) profile across the device. Visualization of the dynamic operation of the device and quantitative measurements of the QFE profile is provided by differential voltage contrast (DVC), which is a modification of the secondary electron imaging in a scanning electron microscope (SEM). The DVC consists of storing two images of a tested semiconductor device. Exposed to the electron beam is a cross section, for example, of a field effect transistor (FET). The first image, covering the entire inside of the FET from source to drain, is taken when the device is not biased. The second image of the same area is taken when the transistor is biased. The secondary electron signal is enhanced or retarded by actual distribution of a potential across the tested device. Subtraction pixel by pixel of the two carefully aligned images removes morphologic contrast from the screen, takes away surface features and contamination of the sample, and reveals the contribution of the electrical field to the changes of contrast. The calibration procedure allows measurement of the potential distribution with a precision of 0.05 V. The first derivative of a potential profile provides for distribution of the electrical field and the second derivative gives the doping profile across the tested device. A variety of semiconductor devices such as p-n junctions, Zener diodes, MOSFET's, MESFET's, solar cells and optical detectors, quantum well lasers, etc., were tested. Videotaping of the tested devices allows us to observe the changes in the electrical field and charge distribution as the device operates in a wide range of electrical or optical signals. PMID:10958389

Mil'shtein

2000-07-01

86

Assistive Listening Devices  

ERIC Educational Resources Information Center

For most hard of hearing students, and for some who are deaf, hearing aids and related sound amplification devices are of great benefit in their communication and learning. Technology has more recently produced an additional array of electronic devices which benefit many hard of hearing students. This report will deal primarily with the relatively…

Warick, Ruth; Clark, Catherine; Dancer, Jesse; Sinclair, Stephen

1997-01-01

87

STORM INLET FILTRATION DEVICE  

EPA Science Inventory

Five field tests were conducted to evaluate the effectiveness of the Storm and Groundwater Enhancement Systems (SAGES) device for removing contaminants from stormwater. The SAGES device is a three-stage filtering system that could be used as a best management practices (BMP) retr...

88

Helical tape forming device  

NASA Technical Reports Server (NTRS)

Using a device that is not limited to a minimum thickness or width-to-thickness ratio, a very thin metal tape or ribbon is formed into a continuous flat wound helical coil. The device imparts the desired circular shape by squeeze rolling it with an unequal force across its width.

Bush, J. E.; Cole, P. T.

1969-01-01

89

Medical Device Security  

Microsoft Academic Search

Medical device security represents a growing problem within the healthcare industry. An increasing number of medical devices and systems contain critical health related information for which integrity, availability, and confidentiality must be maintained. HIPAA's Security Rule requires that US healthcare providers have a security program addressing this problem in place by April 21, 2005. Through a collaborative effort, ACCE and

S. L. Grimes

2004-01-01

90

Auxiliary Data Input Device.  

National Technical Information Service (NTIS)

an object of this invention is to provide in a control lever, a continuous, bi-coordinate, data entry device that can be manipulated by an operator's hand without the necessity of removing the hand from the control lever. The improved data entry device is...

H. D. Garner A. M. Busquets T. W. Hogge R. V. Parrish

1987-01-01

91

Solar powered tracking device  

Microsoft Academic Search

The paper describes the design and operation of a device for tracking the traverse of the sun across the sky, to be used in conjunction with a solar concentrator to ensure maximum solar energy collection. The tracking device consists of two solar energy sensors positioned on opposite sides of a parabolic concentrator which faces south and rotates about the north-south

C. A. Morrison; E. A. Farber; H. A. Ingley; D. B. Wiggins

1976-01-01

92

Microfabricated particle focusing device  

DOEpatents

A microfabricated particle focusing device comprises an acoustic portion to preconcentrate particles over large spatial dimensions into particle streams and a dielectrophoretic portion for finer particle focusing into single-file columns. The device can be used for high throughput assays for which it is necessary to isolate and investigate small bundles of particles and single particles.

Ravula, Surendra K.; Arrington, Christian L.; Sigman, Jennifer K.; Branch, Darren W.; Brener, Igal; Clem, Paul G.; James, Conrad D.; Hill, Martyn; Boltryk, Rosemary June

2013-04-23

93

Advanced resistive exercise device  

NASA Technical Reports Server (NTRS)

The present invention relates to an exercise device, which includes a vacuum cylinder and a flywheel. The flywheel provides an inertial component to the load, which is particularly well suited for use in space as it simulates exercising under normal gravity conditions. Also, the present invention relates to an exercise device, which has a vacuum cylinder and a load adjusting armbase assembly.

Raboin, Jasen L. (Inventor); Niebuhr, Jason (Inventor); Cruz, Santana F. (Inventor); Lamoreaux, Christopher D. (Inventor)

2008-01-01

94

Mobile device security  

Microsoft Academic Search

Because of their small size, memory capability, and the case with which information can be downloaded and removed from a facility, mobile devices pose a risk to organizations when used and transported outside physical boundaries. Mobile devices, including Personal Digital Assistants (PDAs), mobile phones, laptops, and smart phones can expose organizational data if not properly protected. This paper will cover

Benjamin Halpert

2004-01-01

95

Microfabricated drug delivery devices  

Microsoft Academic Search

We review newest developments in the design and fabrication of drug delivery devices based on micropatterned structures. Electronic devices have now reached a stage of dimensions comparable to those of biological macromolecules. This raises exciting possibilities for combining microelectronics and biotechnology to develop new technologies with unprecedented power and versatility. While molecular electronics use the unique self-assembly, switching and dynamic

J. Zachary Hilt; Nicholas A. Peppas

2005-01-01

96

Recently Approved Devices  

MedlinePLUS

... in this section do not include every new medical device that has been cleared or approved for sale in the US. You can find additional information at the links below: PMA Approvals : Monthly listings of all new or high-risk medical devices that were approved via the premarket approval (PMA) ...

97

Automated adsorption isotherm device.  

PubMed Central

A device is described for the automated determination of the water adsorption isotherms of biological materials. The vapor pressure and weight of the adsorbate are measured directly with appropriate transducers, and equilibrium is defined on the basis of constant pressure. The accuracy of the device, determined on two samples with well-known water binding properties, is +/- 5%. Automation is achieved by electronic control.

Wilkinson, A; Morowitz, H J; Lund, W

1976-01-01

98

Colon Hydrotherapy Device.  

National Technical Information Service (NTIS)

A colon hydrotherapy device that includes a multi-chambered housing, a specially designed nozzle for creating a water vortex within the subject's colon for removing impacted fecal matter, and an insertion rod for facilitating the insertion of the device i...

C. W. Waychoff

2004-01-01

99

Oil pick up device  

Microsoft Academic Search

A device for removing oil floating on the surface of water comprises a plurality of discs rotatably mounted on bearings which are positioned along different radii of a median circle. The device is supported on floats so that the discs are partly immersed in the water. There are scrapers attached to each disc so that, on rotation of the discs

Webb

1977-01-01

100

Device control at CEBAF  

Microsoft Academic Search

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 (BPMs), harps, and the camera and solenoid devices (beam viewers, faraday cups, optical transition radiation viewers, synchrotron radiation monitor, etc.). Altogether

S. Schaffner; D. Barker; V. Bookwalter; B. Bowling; K. Brown; L. Doolittle; T. Fox; S. Higgins; A. Hofler; G. Lahti; P. Letta; B. Montjar; N. Patavalis; J. Tang; W. Watson; D. Wetherholt; K. White; S. Witherspoon; M. Wise

1995-01-01

101

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

102

Solar cell device physics  

Microsoft Academic Search

The basic physical principles and materials properties are reviewed which are the foundations of photovoltaic energy conversion. Specific photovoltaic configurations are discussed, including a brief background to establish the historical development of that particular device class, an in-depth development of the physical principles operative for that device class, and a survey of experimental work from the literature pertaining to that

S. Fonash

1981-01-01

103

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

104

Capillary interconnect device  

DOEpatents

An interconnecting device for connecting a plurality of first fluid-bearing conduits to a corresponding plurality of second fluid-bearing conduits thereby providing fluid communication between the first fluid-bearing conduits and the second fluid-bearing conduits. The device includes a manifold and one or two ferrule plates that are held by compressive axial forces.

Renzi, Ronald F

2013-11-19

105

Water flow controller device  

Microsoft Academic Search

A description is given of a water flow controller device of the type used for connecting a solar collecting device to conventional facility plumbing and a water reservoir, which comprises: (A) a cold water source connector; (B) a hot water feed connector; (C) a collector supply connector; (D) a collector return connector; (E) a cold water inlet connector; (F) a

Fender

1980-01-01

106

Air removal device  

NASA Technical Reports Server (NTRS)

A device is described suitable for removing air from water under both zero and one g gravity conditions. The device is comprised of a pair of spaced membranes, one being hydrophobic and the other being hydrophilic. The air-water mixture is introduced into the space between, and the selective action of the membranes removes the air from the water.

Booth, F. W.; Bruce, R. A. (inventors)

1972-01-01

107

NUCLEAR REACTOR SAFETY DEVICE  

Microsoft Academic Search

A self-contained, self-actuating safety device is designed which will ; shut down the reactor upon the occurrence of a predetermined excessively high ; temperature in the core. The safety device comprises a closed tube partially ; filled with a mixture of fissionable material and a liquid having a high vapor ; pressure at a temperature slightly above the desired operating

1963-01-01

108

Nuclear reactor safety device  

Microsoft Academic Search

A safety device is disclosed for use in a nuclear reactor for axially repositioning a control rod with respect to the reactor core in the event of an upward thermal excursion. Such safety device comprises a laminated helical ribbon configured as a tube-like helical coil having contiguous helical turns with slidably abutting edges. The helical coil is disclosed as a

Hutter; Ernest

1986-01-01

109

Self-actuated device  

DOEpatents

A self-actuated device, of particular use as a valve or an orifice for nuclear reactor fuel and blanket assemblies, in which a gas produced by a neutron induced nuclear reaction gradually accumulates as a function of neutron fluence. The gas pressure increase occasioned by such accumulation of gas is used to actuate the device.

Hecht, Samuel L. (Richland, WA)

1984-01-01

110

Heterojunction semiconductor device  

NASA Technical Reports Server (NTRS)

A layer of germanium on a body of P type conductivity single crystal indium phosphide provides a blocking heterojunction. This device will emit light when a suitable voltage is placed thereacross or the device can be used as a photoconductor to generate electrons when light is directed thereon.

Harwylo, Frank Z. (Inventor)

1979-01-01

111

Laser Beam Steering Device.  

National Technical Information Service (NTIS)

A laser beam steering device is made of dual concentric apertured shafts which permit the laser beam to pass through them to a reflecting mirror. The mirror is driven in azimuth and elevation by the shafts. The device can be used with any laser beam and d...

S. A. Miller L. L. Jeffris

1981-01-01

112

Heat tube device  

NASA Technical Reports Server (NTRS)

The present invention discloses a heat tube device through which a working fluid can be circulated to transfer heat to air in a conventional air conditioning system. The heat tube device is disposable about a conventional cooling coil of the air conditioning system and includes a plurality of substantially U-shaped tubes connected to a support structure. The support structure includes members for allowing the heat tube device to be readily positioned about the cooling coil. An actuatable adjustment device is connected to the U-shaped tubes for allowing, upon actuation thereof, for the heat tubes to be simultaneously rotated relative to the cooling coil for allowing the heat transfer from the heat tube device to air in the air conditioning system to be selectively varied.

Khattar, Mukesh K. (inventor)

1990-01-01

113

Planar electrochemical device assembly  

DOEpatents

A pre-fabricated electrochemical device having a dense electrolyte disposed between an anode and a cathode preferably deposited as thin films is bonded to a porous electrically conductive support. A second porous electrically conductive support may be bonded to a counter electrode of the electrochemical device. Multiple electrochemical devices may be bonded in parallel to a single porous support, such as a perforated sheet to provide a planar array. Planar arrays may be arranged in a stacked interconnected array. A method of making a supported electrochemical device is disclosed wherein the method includes a step of bonding a pre-fabricated electrochemical device layer to an existing porous metal or porous metal alloy layer.

Jacobson; Craig P. (Lafayette, CA), Visco; Steven J. (Berkeley, CA), De Jonghe; Lutgard C. (Lafayette, CA)

2010-11-09

114

Planar electrochemical device assembly  

DOEpatents

A pre-fabricated electrochemical device having a dense electrolyte disposed between an anode and a cathode preferably deposited as thin films is bonded to a porous electrically conductive support. A second porous electrically conductive support may be bonded to a counter electrode of the electrochemical device. Multiple electrochemical devices may be bonded in parallel to a single porous support, such as a perforated sheet to provide a planar array. Planar arrays may be arranged in a stacked interconnected array. A method of making a supported electrochemical device is disclosed wherein the method includes a step of bonding a pre-fabricated electrochemical device layer to an existing porous metal or porous metal alloy layer.

Jacobson, Craig P. (Lafayette, CA); Visco, Steven J. (Berkeley, CA); De Jonghe, Lutgard C. (Lafayette, CA)

2007-06-19

115

Fluidic nanotubes and devices  

DOEpatents

Fluidic nanotube devices are described in which a hydrophilic, non-carbon nanotube, has its ends fluidly coupled to reservoirs. Source and drain contacts are connected to opposing ends of the nanotube, or within each reservoir near the opening of the nanotube. The passage of molecular species can be sensed by measuring current flow (source-drain, ionic, or combination). The tube interior can be functionalized by joining binding molecules so that different molecular species can be sensed by detecting current changes. The nanotube may be a semiconductor, wherein a tubular transistor is formed. A gate electrode can be attached between source and drain to control current flow and ionic flow. By way of example an electrophoretic array embodiment is described, integrating MEMs switches. A variety of applications are described, such as: nanopores, nanocapillary devices, nanoelectrophoretic, DNA sequence detectors, immunosensors, thermoelectric devices, photonic devices, nanoscale fluidic bioseparators, imaging devices, and so forth.

Yang, Peidong (El Cerrito, CA); He, Rongrui (El Cerrito, CA); Goldberger, Joshua (Berkeley, CA); Fan, Rong (El Cerrito, CA); Wu, Yiying (Albany, CA); Li, Deyu (Albany, CA); Majumdar, Arun (Orinda, CA)

2010-01-10

116

Fluidic nanotubes and devices  

DOEpatents

Fluidic nanotube devices are described in which a hydrophilic, non-carbon nanotube, has its ends fluidly coupled to reservoirs. Source and drain contacts are connected to opposing ends of the nanotube, or within each reservoir near the opening of the nanotube. The passage of molecular species can be sensed by measuring current flow (source-drain, ionic, or combination). The tube interior can be functionalized by joining binding molecules so that different molecular species can be sensed by detecting current changes. The nanotube may be a semiconductor, wherein a tubular transistor is formed. A gate electrode can be attached between source and drain to control current flow and ionic flow. By way of example an electrophoretic array embodiment is described, integrating MEMs switches. A variety of applications are described, such as: nanopores, nanocapillary devices, nanoelectrophoretic, DNA sequence detectors, immunosensors, thermoelectric devices, photonic devices, nanoscale fluidic bioseparators, imaging devices, and so forth.

Yang, Peidong (Berkeley, CA); He, Rongrui (El Cerrito, CA); Goldberger, Joshua (Berkeley, CA); Fan, Rong (El Cerrito, CA); Wu, Yiying (Albany, CA); Li, Deyu (Albany, CA); Majumdar, Arun (Orinda, CA)

2008-04-08

117

Device for cutting protrusions  

DOEpatents

An apparatus for clipping a protrusion of material is provided. The protrusion may, for example, be a bolt head, a nut, a rivet, a weld bead, or a temporary assembly alignment tab protruding from a substrate surface of assembled components. The apparatus typically includes a cleaver having a cleaving edge and a cutting blade having a cutting edge. Generally, a mounting structure configured to confine the cleaver and the cutting blade and permit a range of relative movement between the cleaving edge and the cutting edge is provided. Also typically included is a power device coupled to the cutting blade. The power device is configured to move the cutting edge toward the cleaving edge. In some embodiments the power device is activated by a momentary switch. A retraction device is also generally provided, where the retraction device is configured to move the cutting edge away from the cleaving edge.

Bzorgi, Fariborz M. (Knoxville, TN)

2011-07-05

118

Trigonometry via Mobile Device  

NSDL National Science Digital Library

Students investigate the relationships between angles and side lengths in right triangles with the help of materials found in the classroom and a mobile device. Using all or part of a meter stick or dowel and text books or other supplies, students build right triangles and measure the angles using a clinometer application on an Android® (phone or tablet) or iOS® device (iPhone® or iPad®). Then they are challenged to create a triangle with a given side length and one angle. The electronic device is used to measure the accuracy of their constructions.

Impart Ret Program

119

Wireless quantified reflex device  

NASA Astrophysics Data System (ADS)

The deep tendon reflex is a fundamental aspect of a neurological examination. The two major parameters of the tendon reflex are response and latency, which are presently evaluated qualitatively during a neurological examination. The reflex loop is capable of providing insight for the status and therapy response of both upper and lower motor neuron syndromes. Attempts have been made to ascertain reflex response and latency, however these systems are relatively complex, resource intensive, with issues of consistent and reliable accuracy. The solution presented is a wireless quantified reflex device using tandem three dimensional wireless accelerometers to obtain response based on acceleration waveform amplitude and latency derived from temporal acceleration waveform disparity. Three specific aims have been established for the proposed wireless quantified reflex device: 1. Demonstrate the wireless quantified reflex device is reliably capable of ascertaining quantified reflex response and latency using a quantified input. 2. Evaluate the precision of the device using an artificial reflex system. 3.Conduct a longitudinal study respective of subjects with healthy patellar tendon reflexes, using the wireless quantified reflex evaluation device to obtain quantified reflex response and latency. Aim 1 has led to the steady evolution of the wireless quantified reflex device from a singular two dimensional wireless accelerometer capable of measuring reflex response to a tandem three dimensional wireless accelerometer capable of reliably measuring reflex response and latency. The hypothesis for aim 1 is that a reflex quantification device can be established for reliably measuring reflex response and latency for the patellar tendon reflex, comprised of an integrated system of wireless three dimensional MEMS accelerometers. Aim 2 further emphasized the reliability of the wireless quantified reflex device by evaluating an artificial reflex system. The hypothesis for aim 2 is that the wireless quantified reflex device can obtain reliable reflex parameters (response and latency) from an artificial reflex device. Aim 3 synthesizes the findings relevant to aim 1 and 2, while applying the wireless accelerometer reflex quantification device to a longitudinal study of healthy patellar tendon reflexes. The hypothesis for aim 3 is that during a longitudinal evaluation of the deep tendon reflex the parameters for reflex response and latency can be measured with a considerable degree of accuracy, reliability, and reproducibility. Enclosed is a detailed description of a wireless quantified reflex device with research findings and potential utility of the system, inclusive of a comprehensive description of tendon reflexes, prior reflex quantification systems, and correlated applications.

Lemoyne, Robert Charles

120

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

121

Corrosion Detection Devices  

SciTech Connect

Nondestructive Examination Systems' (NDE) specialists at the Department of Energy's Savannah River Site have unique, remotely controllable, corrosion detection capabilities. The corrosion detection devices most frequently used are automated ultrasonic mapping systems, digital radiography imaging devices, infrared imaging, and eddy current mapping systems. These devices have been successfully used in a variety of applications, some of which involve high levels of background radiation. Not only is corrosion located and mapped but other types of anomalies such as cracks have been detected and characterized. Examples of actual corrosion that has been detected will be discussed along with the NDE systems that were used.

Howard, B.

2003-12-01

122

Optically detonated explosive device  

NASA Technical Reports Server (NTRS)

A technique and apparatus for optically detonating insensitive high explosives, is disclosed. An explosive device is formed by containing high explosive material in a house having a transparent window. A thin metallic film is provided on the interior surface of the window and maintained in contact with the high explosive. A laser pulse provided by a Q-switched laser is focussed on the window to vaporize the metallic film and thereby create a shock wave which detonates the high explosive. Explosive devices may be concurrently or sequentially detonated by employing a fiber optic bundle to transmit the laser pulse to each of the several individual explosive devices.

Yang, L. C.; Menichelli, V. J. (inventors)

1974-01-01

123

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

124

Si Thermoelectric Devices  

NASA Astrophysics Data System (ADS)

High-performance Mg2Si thermoelectric devices have been obtained by spark plasma sintering of high-purity, pre-synthesized, all-molten Mg2Si powder. We studied the effects of source powder particle size on thermoelectric performance. To improve the performance, further investigation of the microstructure of the devices is needed. In this work we studied the microstructure of grain boundaries and interfaces between electrodes and Mg2Si sintered bodies to increase understanding of Mg2Si thermoelectric devices.

Nakamura, Shigeyuki; Mori, Yoshihisa; Takarabe, Ken'ichi

2014-06-01

125

Unipolar arc simulation device  

NASA Astrophysics Data System (ADS)

We describe a simple laboratory device for establishing a vacuum arc plasma discharge that can serve to simulate a unipolar arc. The technique makes use of a triggered vacuum arc plasma gun to generate a plasma plume that in turn causes breakdown of a secondary discharge. The device is in fact a secondary vacuum arc discharge that is triggered by a primary vacuum arc discharge, with some of the features of the secondary plasma discharge having similarities with a unipolar arc configuration. Here we describe the experimental setup and outline how the device can be used for some areas of unipolar arc materials research.

Wang, S. G.; Brown, I. G.

1999-09-01

126

Corneal seal device  

NASA Technical Reports Server (NTRS)

A corneal seal device is provided which, when placed in an incision in the eye, permits the insertion of a surgical tool or instrument through the device into the eye. The device includes a seal chamber which opens into a tube which is adapted to be sutured to the eye and serves as an entry passage for a tool. A sealable aperture in the chamber permits passage of the tool through the chamber into the tube and hence into the eye. The chamber includes inlet ports adapted to be connected to a regulated source of irrigation fluid which provides a safe intraocular pressure.

Baehr, E. F. (inventor)

1977-01-01

127

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

128

Burst-Disk Device Simulates Effect Of Pyrotechnic Device  

NASA Technical Reports Server (NTRS)

Expendable disks substituted for costly pyrotechnic devices for testing actuators. Burst-disk device produces rush of pressurized gas similar to pyrotechnic device. Designed to reduce cost of testing pyrotechnically driven emergency actuators (parachute-deploying mechanisms in original application).

Rogers, James P.; Sexton, James H.

1995-01-01

129

Supraglottic airway devices.  

PubMed

Supraglottic airway devices (SADs) are used to keep the upper airway open to provide unobstructed ventilation. Early (first-generation) SADs rapidly replaced endotracheal intubation and face masks in > 40% of general anesthesia cases due to their versatility and ease of use. Second-generation devices have further improved efficacy and utility by incorporating design changes. Individual second-generation SADs have allowed more dependable positive-pressure ventilation, are made of disposable materials, have integrated bite blocks, are better able to act as conduits for tracheal tube placement, and have reduced risk of pulmonary aspiration of gastric contents. SADs now provide successful rescue ventilation in > 90% of patients in whom mask ventilation or tracheal intubation is found to be impossible. However, some concerns with these devices remain, including failing to adequately ventilate, causing airway damage, and increasing the likelihood of pulmonary aspiration of gastric contents. Careful patient selection and excellent technical skills are necessary for successful use of these devices. PMID:24891199

Ramachandran, Satya Krishna; Kumar, Anjana M

2014-06-01

130

Intensified Bistable Optical Device.  

National Technical Information Service (NTIS)

Optical computers are potentially critical elements in meeting the intense battle management computation requirements of the SDI program. The current lack of highspeed, high-resolution nonlinear light modulation devices limits the performance of and utili...

1988-01-01

131

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

132

Capacitance Probe Sensor Device.  

National Technical Information Service (NTIS)

A capacitance probe sensor device is disclosed which is a probe formed of KYNAR insulated wire spaced from an uninsulated metallic ground electrode. An oscillator and associated capacitance-resistance network connected to the probe serve to provide a line...

M. Gutierrez

1980-01-01

133

Recent Medical Device Recalls  

MedlinePLUS

... is a Medical Device Recall? Recalls Database Safety Communications MedWatch: The FDA Safety Information and Adverse Event Reporting Program FDA 101: Product Recalls - From First Alert to Effectiveness Checks [ARCHIVED] Older Recalls 2011 Medical ...

134

Differential Thermometric Bioanalytical Device.  

National Technical Information Service (NTIS)

Feasibility and evaluation studies for utilizing the pyroelectric response of polyvinylidene fluoride (PVDF) film demonstrated the potential utility of this concept as a general biosensor device. The design and fabrication of thin polymer film sensor elem...

M. K. Malmros

1990-01-01

135

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

136

Fluid flow check device  

SciTech Connect

This patent describes a fluid flow check device adapted for interconnection with a fluid flow line check valve while the check valve is positioned in the flow line, comprising: a pivot shaft removably connected at a first end with a flapper pivot axle within the check valve while the check valve is positioned in the flow line; a fluid check device housing having an opening therethrough; a switch mounted within the fluid flow check device housing actuated by rotation of a second end of the pivot shaft, which extend into the fluid flow check device housing through the opening; and alarm means operatively connected to the switch for indicating a fluid flow or no-fluid flow condition of the check valve.

League, B.E.

1989-02-21

137

Thermoelectric materials and devices  

NASA Technical Reports Server (NTRS)

New thermoelectric materials comprise highly [111]-oriented twinned group IV alloys on the basal plane of trigonal substrates, which exhibit a high thermoelectric figure of merit and good material performance, and devices made with these materials.

Park, Yeonjoon (Inventor); Choi, Sang H. (Inventor); King, Glen C. (Inventor); Elliott, James R. (Inventor); Talcott, Noel A. (Inventor)

2011-01-01

138

Electrochromic Display Device.  

National Technical Information Service (NTIS)

The work has been concentrated on the optimization of the fabrication process of known solid state electrochromic devices and on the evaluation of their performance characteristics. Significant progress has been made in the successful routine fabrication ...

S. K. Deb H. Witzke

1976-01-01

139

Solar energy refrigeration device  

SciTech Connect

The invention relates to a refrigeration device using solar energy. This device includes a refrigeration fluid, such as water, which circulates between the solar energy heat exchanger containing zeolite, and an evaporator located in a cooling chamber through a condenser, then return to the exchanger through a three way valve. The device includes a second channel in the exchanger, which channel includes a fluid, and a second exchanger consisting of a tube with fins connected to a storage tank containing water at various temperatures. During the day whenever the period of sunshine is not sufficient, additional heat in the form of hot water is provided to the exchanger. Conversely if the night temperature is not low enough, cooling in the exchanger is assisted by a cooling device located in the second channel. Hot water 25/sup 0/ C. is provided by the excess heat produced by the sun at day's end.

Wiart, A.; Paeye, G.

1985-04-09

140

Medical Device Evaluation Program.  

National Technical Information Service (NTIS)

Model IV of the Army Hear Monitor is an electronic device that monitors the electrocardiogram (ECG); sounds an alarm on diagnosing a high or low heart rate, excess electrical noise, cardiac arrest, or ventricular fibrillation. Because of the successful pe...

K. D. Thompson J. M. Calkins

1974-01-01

141

High temperature measuring device  

DOEpatents

A temperature measuring device for very high design temperatures (to 2,000.degree. C.). The device comprises a homogenous base structure preferably in the form of a sphere or cylinder. The base structure contains a large number of individual walled cells. The base structure has a decreasing coefficient of elasticity within the temperature range being monitored. A predetermined quantity of inert gas is confined within each cell. The cells are dimensionally stable at the normal working temperature of the device. Increases in gaseous pressure within the cells will permanently deform the cell walls at temperatures within the high temperature range to be measured. Such deformation can be correlated to temperature by calibrating similarly constructed devices under known time and temperature conditions.

Tokarz, Richard D. (West Richland, WA)

1983-01-01

142

Low Vision Devices  

MedlinePLUS

... eye care professional demonstrates an electronic magnifying device. Credit: National Eye Institute, National Institutes of Health Ref#: ... appliance can help a person with low vision. Credit: National Eye Institute, National Institutes of Health Ref#: ...

143

Countering Improvised Explosive Devices.  

National Technical Information Service (NTIS)

We have no greater responsibility than providing for the safety and security for our citizens, allies, and partners, while providing an economic environment that promotes opportunity and prosperity. The use of improvised explosive devices (IEDs) threatens...

B. Obama

2013-01-01

144

Acoustic Multistrip Device Techniques.  

National Technical Information Service (NTIS)

The report describes the accomplishments of the first six months of development of optimum techniques for the analysis and design of multistrip devices. A field theory approach was used to analyze the performance of the symmetrical multistrip coupler (MSC...

T. W. Bristol C. W. Chapman

1974-01-01

145

Anticoagulating Blood Suction Device.  

National Technical Information Service (NTIS)

An anticoagulating blood suction device is described for use in intra-operative autotransfusion operations which removes pools of blood and simultaneously draws a controlled amount of anticoagulant into the stream of blood by means of a metering orifice d...

Riggle Hoye Bennett

1972-01-01

146

Laser Beam Steering Device.  

National Technical Information Service (NTIS)

Agile beam steering is a critical requirement for airborne and space based LIDAR and optical communication systems. Design and test results are presented for a compact beam steering device with low inertia which functions by dithering two complementary (p...

M. E. Motamedi A. P. Andrews W. J. Gunning

1993-01-01

147

Nanowire Thermoelectric Devices  

NASA Technical Reports Server (NTRS)

Nanowire thermoelectric devices, now under development, are intended to take miniaturization a step beyond the prior state of the art to exploit the potential advantages afforded by shrinking some device features to approximately molecular dimensions (of the order of 10 nm). The development of nanowire-based thermoelectric devices could lead to novel power-generating, cooling, and sensing devices that operate at relatively low currents and high voltages. Recent work on the theory of thermoelectric devices has led to the expectation that the performance of such a device could be enhanced if the diameter of the wires could be reduced to a point where quantum confinement effects increase charge-carrier mobility (thereby increasing the Seebeck coefficient) and reduce thermal conductivity. In addition, even in the absence of these effects, the large aspect ratios (length of the order of tens of microns diameter of the order of tens of nanometers) of nanowires would be conducive to the maintenance of large temperature differences at small heat fluxes. The predicted net effect of reducing diameters to the order of tens of nanometers would be to increase its efficiency by a factor of .3. Nanowires made of thermoelectric materials and devices that comprise arrays of such nanowires can be fabricated by electrochemical growth of the thermoelectric materials in templates that contain suitably dimensioned pores (10 to 100 nm in diameter and 1 to 100 microns long). The nanowires can then be contacted in bundles to form devices that look similar to conventional thermoelectric devices, except that a production version may contain nearly a billion elements (wires) per square centimeter, instead of fewer than a hundred as in a conventional bulk thermoelectric device or fewer than 100,000 as in a microdevice. It is not yet possible to form contacts with individual nanowires. Therefore, in fabricating a nanowire thermoelectric device, one forms contacts on nanowires in bundles of the order of 10-microns wide. The fill factor for the cross-section of a typical bundle is about 1/2. Nanowires have been grown in alumina templates with pore diameters of 100 and 40 nm.

Borshchevsky, Alexander; Fleurial, Jean-Pierre; Herman, Jennifer; Ryan, Margaret

2005-01-01

148

Commercialization of microfluidic devices.  

PubMed

Microfluidic devices offer automation and high-throughput screening, and operate at low volumes of consumables. Although microfluidics has the potential to reduce turnaround times and costs for analytical devices, particularly in medical, veterinary, and environmental sciences, this enabling technology has had limited diffusion into consumer products. This article analyzes the microfluidics market, identifies issues, and highlights successful commercialization strategies. Addressing niche markets and establishing compatibility with existing workflows will accelerate market penetration. PMID:24954000

Volpatti, Lisa R; Yetisen, Ali K

2014-07-01

149

Programming of RFID Devices  

Microsoft Academic Search

\\u000a Embedded programming is a device software which plays an integral part in the electronics device. Embedded software’s principal\\u000a role is not information technology, but rather the interaction with the physical world. It is written for machines that are\\u000a not, first and foremost, computers. Embedded software is “built in” to the electronics in cars, telephones, audio equipment,\\u000a robots, appliances, toys, security

L. K. Bandyopadhyay; S. K. Chaulya; P. K. Mishra

150

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

151

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

152

-Based Thermoelectric Devices  

NASA Astrophysics Data System (ADS)

The impact of contact resistance on thermoelectric (TE) device performance grows more significant as devices are scaled down. To improve and understand the effects of contact resistance on bulk TE device performance, a reliable experimental measurement method is needed. There are many popular methods to extract contact resistance, but they are only well suited for measuring metal contacts on thin films and do not necessarily translate to measuring contact resistance on bulk TE materials. The authors present a measurement technique that precisely measures contact resistance on bulk TE materials by making and testing stacks of bulk, metal-coated TE wafers using TE industry-standard processes. An equation that uses the Z of the stacked device to extract the contact resistance is used to reduce the sensitivity to resistivity variations of the TE material. Another advantage of this technique is that it exploits realistic TE device manufacturing techniques and results in an almost device-like structure. The lowest contact resistivity measured was 1.1 × 10-6 ? cm2 and 1.3 × 10-6 ? cm2 for n- and p-type materials, respectively using a newly developed process at 300 K. The uncertainty in the contact resistivity values for each sample was 10% to 20%, which is quite good for measurements in the 10-6 ? cm2 range.

Gupta, Rahul P.; McCarty, Robin; Sharp, Jeff

2014-06-01

153

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

154

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

155

White organic electroluminescent devices  

NASA Astrophysics Data System (ADS)

This study investigates energy transfer between N, N'-bis-(1-naphthyl)- N, N'-diphenyl-1,1-biphenyl-4-4'-diamine (NPB) host material and 4-dicyanomethylene-2-methyl-6-[2-(2,3,6,7-tetrahydro-1 H,5 H-benzo[ ij]quinolizin-8-yl) vinyl]-4 H-pyran (DCM2) fluorescent dye in organic electroluminescent (OEL) devices to produce white-color emission. Bathocuproine (BCP) was applied as a hole-blocking layer (HBL) due to its significantly large HOMO, while tris-(8-hydroxy-quinoline) aluminum (Alq 3) was employed in the electron transport layer (ETL). Two OEL device structures were investigated, ITO/NPB:DCM2 ( x%)/Alq 3/Al, and ITO/NPB:DCM2 ( y%)/BCP/Alq 3/Al. In this study, doping DCM2 into the NPB host material could not yield red emission in the case of ITO/NPB:DCM2 ( x%)/Alq 3/Al structure device, even when the DCM2 doping concentration was increased from x=1% to 10%. However, when BCP was inserted between the NPB:DCM2 layer and the Alq 3 layer, the color turned when the concentration of DCM2 doped into NPB was changed. Consequently, the white OEL device with CIE coordinates (0.34,0.34) was observed for the device containing 1% DCM2 doping into NPB host material.

Tsou, Chuan-Cheng; Lu, Huei-Tzong; Yokoyama, Meiso

2006-04-01

156

Microfluidic blood filtration device.  

PubMed

Rapid decentralized biomedical diagnostics have become increasingly necessary in a medical environment of growing costs and mounting demands on healthcare personnel and infrastructure. Such diagnostics require low-cost novel devices that can operate at bedside or in doctor offices using small amounts of sample that can be extracted and processed on the spot. Thus, point-of-care sample preparation is an important component of the necessary diagnostic paradigm shift. We therefore introduce a microfluidic device which produces plasma from whole blood. The device is inexpensive, reliable, easy to fabricate, and requires only 3.5 kPa pressure to operate. The device is fully compatible with microfluidic diagnostic chips. The output 23-gauge microtube of the former can be directly plugged into the input ports of the latter allowing immediate applicability in practice as a sample-prep pre-stage to a variety of emergent microfluidic diagnostic devices. In addition, the shown approach of filter encapsulation in elastomer has principle importance as it is compatible with and applicable to microfluidic sample-prep integration with analytical stages within the same elastomeric chip. This can eventually lead to finger-prick blood tests in point-of-care settings. PMID:21053083

Maltezos, George; Lee, John; Rajagopal, Aditya; Scholten, Kee; Kartalov, Emil; Scherer, Axel

2011-02-01

157

Spectral tailoring device  

DOEpatents

A spectral tailoring device for altering the neutron energy spectra and flux of neutrons in a fast reactor thereby selectively to enhance or inhibit the transmutation rate of a target metrical to form a product isotope. Neutron moderators, neutron filters, neutron absorbers and neutron reflectors may be used as spectral tailoring devices. Depending on the intended use for the device, a member from each of these four classes of materials could be used singularly, or in combination, to provide a preferred neutron energy spectra and flux of the neutrons in the region of the target material. In one embodiment of the invention, an assembly is provided for enhancing the production of isotopes, such as cobalt 60 and gadolinium 153. In another embodiment of the invention, a spectral tailoring device is disposed adjacent a target material which comprises long lived or volatile fission products and the device is used to shift the neutron energy spectra and flux of neutrons in the region of the fission products to preferentially transmute them to produce a less volatile fission product inventory. 6 figs.

Brager, H.R.; Schenter, R.E.; Carter, L.L.; Karnesky, R.A.

1987-08-05

158

Active Photonic Devices  

NASA Astrophysics Data System (ADS)

The chapter is devoted to active photonic devices fabricated by fs-laser writing. After a brief introduction focused on the role played by fs-laser written active devices, Sect. 10.2 briefly reviews the spectroscopical properties of the most interesting active ions so far exploited, namely erbium, ytterbium, neodimium, and bismuth. In Sect. 10.3 the main figures of merit for an active waveguide, namely the internal gain, the insertion loss, the net gain, and the noise figure are introduced and the experimental procedure for accurate gain measurement is also detailed. A thorough review of the active photonic devices demonstrated with the femtosecond laser microfabrication technique is presented in Sects. 10.4, 10.5, and 10.6, where several active waveguides and amplifiers, prototypal lasers, as well as more functionalized laser devices (operating under single longitudinal mode or stable mode-locking regime) are illustrated, respectively. Finally, conclusions and future perspectives of femtosecond-laser micromachining of active photonic devices are provided.

Valle, Giuseppe Della; Osellame, Roberto

159

Electrical apparatus lockout device  

SciTech Connect

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, R.

1999-10-12

160

Double face sealing device  

NASA Technical Reports Server (NTRS)

A double face sealing device for mounting between two surfaces to provide an airtight and fluid-tight seal between a closure member bearing one of the surfaces and a structure or housing bearing the other surface which extends around the opening or hatchway to be closed. The double face sealing device includes a plurality of sections or segments mounted to one of the surfaces, each having a main body portion, a pair of outwardly extending and diverging, cantilever, spring arms, and a pair of inwardly extending and diverging, cantilever, spring arms, an elastomeric cover on the distal, free, ends of the outwardly extending and diverging spring arms, and an elastomeric cover on the distal, free, ends of the inwardly extending and diverging spring arms. The double face sealing device has application or use in all environments requiring a seal, but is particularly useful to seal openings or hatchways between compartments of spacecraft or aircraft.

Weddendorf, Bruce C. (Inventor)

1991-01-01

161

Optical alignment device  

NASA Technical Reports Server (NTRS)

A patent application was presented for an invention whose principal objective is the provision of an improved alignment device for observing the degree of coalignment of a pair of objects. The device includes a beamsplitter to be interposed between a pair of objects for observing the degree of coalignment. Light from one of the objects is reflected from the beamsplitter into a retroreflector which reflects the light back through the beamsplitter into an imaging system. Light from the other object is reflected from the beamsplitter into the same imaging system. The amount of displacement of the two images is inversely related to the degree of coalignment of the two objects. The optical alignment device is useful for aligning a mirror with an object, two objects or two mirrors.

Thomas, N. L. (inventor)

1976-01-01

162

ALS insertion devices  

SciTech Connect

The Advanced Light Source (ALS), the first US third generation synchrotron radiation source, is currently under construction at the Lawrence Berkeley Laboratory. The low-emittance, 1.5 GeV electron storage ring and the insertion devices are specifically designed to produce high brightness beams in the UV to soft X-Ray range. The planned initial complement of insertion devices includes four 4.6 m long undulators, with period lengths of 3.9 cm, 5.0 cm (2) and 8.0 cm, and a 2.9 m long wiggler of 16 cm period length. Undulator design is well advanced and fabrication has begun on the 5.0 cm and 8.0 cm period length undulators. This paper discusses ALS insertion device requirements; general design philosophy; and design of the magnetic structure, support structure/drive systems, control system and vacuum system. 18 refs., 9 figs., 5 tabs.

Hoyer, E.; Chin, J.; Halbach, K.; Hassenzahl, W.V.; Humphries, D.; Kincaid, B.; Lancaster, H.; Plate, D.

1990-11-01

163

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

164

Global endometrial ablation devices.  

PubMed

Since 1997, the US Food and Drug Administration has approved 5 global endometrial ablation (GEA) devices for the minimally invasive treatment of idiopathic menorrhagia. These include a variety of modalities to ablate the endometrium, including thermal balloon, circulated hot fluid, cryotherapy, radiofrequency electrosurgery, and microwave energy. Level I evidence is available to support high subjective satisfaction rates regardless of GEA method. There is a wide range of amenorrhea rates (13.9% to 55.3%) among GEA methods. Complication rates associated with GEA procedures are generally low when performed by physicians familiar with these devices, working under standard protocols compared with some of the major complications seen after these devices have been used by a broader range of physicians without study protocols. Adherence to patient selection and protocols is recommended. PMID:18303511

Zarek, Sarah; Sharp, Howard T

2008-03-01

165

Percutaneous connector device  

NASA Technical Reports Server (NTRS)

A device is reported for facilitating the passage of electrical signals from an external source through the skin of a patient to internal portions of the body such as muscles and nerves. The connector device includes a bio-compatible shell having an enlarged disk shaped portion for being implanted below the skin of the patient. The shell has a first and second electrically conductive post carried therein upon which a plug can be readily connected and disconnected. A modified form of the invention utilizes a unipolar connector that is adapted to be plugged into a shell implanted below the skin of a patient. Both of the connector devices are designed to be separated when a predetermined force is applied. This prevents excessive force from being applied to the implanted bio-compatible shell.

Parsons, W. E. (inventor)

1976-01-01

166

Evaporative Cooling Membrane Device  

NASA Technical Reports Server (NTRS)

An evaporative cooling membrane device is disclosed having a flat or pleated plate housing with an enclosed bottom and an exposed top that is covered with at least one sheet of hydrophobic porous material having a thin thickness so as to serve as a membrane. The hydrophobic porous material has pores with predetermined dimensions so as to resist any fluid in its liquid state from passing therethrough but to allow passage of the fluid in its vapor state, thereby, causing the evaporation of the fluid and the cooling of the remaining fluid. The fluid has a predetermined flow rate. The evaporative cooling membrane device has a channel which is sized in cooperation with the predetermined flow rate of the fluid so as to produce laminar flow therein. The evaporative cooling membrane device provides for the convenient control of the evaporation rates of the circulating fluid by adjusting the flow rates of the laminar flowing fluid.

Lomax, Curtis (Inventor); Moskito, John (Inventor)

1999-01-01

167

Nonimaging radiant energy device  

DOEpatents

A nonimaging radiant energy device may include a hyperbolically shaped reflective element with a radiant energy inlet and a radiant energy outlet. A convex lens is provided at the radiant energy inlet and a concave lens is provided at the radiant energy outlet. Due to the provision of the lenses and the shape of the walls of the reflective element, the radiant energy incident at the radiant energy inlet within a predetermined angle of acceptance is emitted from the radiant energy outlet exclusively within an acute exit angle. In another embodiment, the radiant energy device may include two interconnected hyperbolically shaped reflective elements with a respective convex lens being provided at each aperture of the device.

Winston, Roland (Chicago, IL); Ning, Xiaohui (North Providence, RI)

1993-01-01

168

Nonimaging radiant energy device  

DOEpatents

A nonimaging radiant energy device may include a hyperbolically shaped reflective element with a radiant energy inlet and a radiant energy outlet. A convex lens is provided at the radiant energy inlet and a concave lens is provided at the radiant energy outlet. Due to the provision of the lenses and the shape of the walls of the reflective element, the radiant energy incident at the radiant energy inlet within a predetermined angle of acceptance is emitted from the radiant energy outlet exclusively within an acute exit angle. In another embodiment, the radiant energy device may include two interconnected hyperbolically shaped reflective elements with a respective convex lens being provided at each aperture of the device.

Winston, Roland (Chicago, IL); Ning, Xiaohui (North Providence, RI)

1996-01-01

169

Electrochromic optical switching device  

DOEpatents

An electrochromic cell is disclosed which comprises an electrochromic layer, a polymerizable organo-sulfur layer which comprises the counter electrode of the structure, and an ionically conductive electronically insulating material which comprises the separator between the electrodes. In a preferred embodiment, both the separator and the organo-sulfur electrode (in both its charged and uncharged states) are transparent either to visible light or to the entire solar spectrum. An electrochromic device is disclosed which comprises such electrodes and separator encased in glass plates on the inner surface of each of which is formed a transparent electrically conductive film in respective electrical contact with the electrodes which facilitates formation of an external electrical connection or contact to the electrodes of the device to permit electrical connection of the device to an external potential source.

Lampert, Carl M. (El Sobrante, CA); Visco, Steven J. (Berkeley, CA)

1992-01-01

170

Electrochromic optical switching device  

DOEpatents

An electrochromic cell is disclosed which comprises an electrochromic layer, a polymerizable organo-sulfur layer which comprises the counter electrode of the structure, and an ionically conductive electronically insulating material which comprises the separator between the electrodes. In a preferred embodiment, both the separator and the organo-sulfur electrode (in both its charged and uncharged states) are transparent either to visible light or to the entire solar spectrum. An electrochromic device is disclosed which comprises such electrodes and separator encased in glass plates on the inner surface of each of which is formed a transparent electrically conductive film in respective electrical contact with the electrodes which facilitates formation of an external electrical connection or contact to the electrodes of the device to permit electrical connection of the device to an external potential source. 3 figs.

Lampert, C.M.; Visco, S.J.

1992-08-25

171

Fragment capture device  

DOEpatents

A fragment capture device for use in explosive containment. The device comprises an assembly of at least two rows of bars positioned to eliminate line-of-sight trajectories between the generation point of fragments and a surrounding containment vessel or asset. The device comprises an array of at least two rows of bars, wherein each row is staggered with respect to the adjacent row, and wherein a lateral dimension of each bar and a relative position of each bar in combination provides blockage of a straight-line passage of a solid fragment through the adjacent rows of bars, wherein a generation point of the solid fragment is located within a cavity at least partially enclosed by the array of bars.

Payne, Lloyd R. (Los Lunas, NM); Cole, David L. (Albuquerque, NM)

2010-03-30

172

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

173

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

174

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

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

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) [Albuquerque, NM; Galambos, Paul C. (Albuquerque, NM) [Albuquerque, NM; Derzon, Mark S. (Tijeras, NM) [Tijeras, NM

2010-05-11

177

Receptacle lid securing device  

US Patent & Trademark Office Database

A lid securing device is provided for receptacles having a receptacle body and a receptacle lid. The lid securing device preferably includes at least one lid strap and a receptacle strap. The lid strap has a first engagement structure at least at one end thereof. The receptacle strap is adapted to circumferentially engage the receptacle body and has a second engagement structure. The first and second engagement structures are adapted to detachably engage ends of the lid strap to the receptacle strap. The receptacle strap and lid strap preferably are constructed from an elastic material, such that they can be securely stretched across the receptacle and receptacle lid, respectively.

1990-12-11

178

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

179

Phononic crystal devices  

DOEpatents

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

180

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

181

Subwavelength grating filtering devices.  

PubMed

We propose and simulate the characteristics of optical filters based on subwavelength gratings. In particular, we demonstrate through numerical simulations the feasibility of implementing SWG Bragg gratings in silicon-on-insulator (SOI). We also propose SWG ring resonators in SOI and verify their operation using numerical simulations and experiments. The fabricated devices exhibit an extinction ratio as large as 30 dB and a Q-factor as high as ~20,000. These fundamental SWG filters can serve as building blocks for more complex devices. PMID:24977793

Wang, Junjia; Glesk, Ivan; Chen, Lawrence R

2014-06-30

182

Portable emittance measurement device.  

PubMed

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. PMID:20192459

Liakin, D; Seleznev, D; Orlov, A; Kuibeda, R; Kropachev, G; Kulevoy, T; Yakushin, P

2010-02-01

183

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

184

Semiconductor structure and devices  

NASA Technical Reports Server (NTRS)

Semiconductor devices such as lasers which include a substrate with a channel therein with a clad layer overlying the substrate and filling the channel exhibit irregularities such as terraces in the surface of the clad layer which are detrimental to device performance. These irregularities are substantially eliminated by forming the channel in a surface of a buffer layer greater than about 4 micrometers thick on the substrate and forming the clad layer over the buffer layer and the channel. CW lasers incorporating the principles of the invention exhibit the highest output power in a single spatial mode and maximum output power which have been observed to date.

Dinkel, Nancy A. (Inventor); Goldstein, Bernard (Inventor); Ettenberg, Michael (Inventor)

1987-01-01

185

Device configuration-management system  

SciTech Connect

The Fusion Chamber System, a major component of the Magnetic Fusion Test Facility, contains several hundred devices which report status to the Supervisory Control and Diagnostic System for control and monitoring purposes. To manage the large number of diversity of devices represented, a device configuration management system was required and developed. Key components of this software tool include the MFTF Data Base; a configuration editor; and a tree structure defining the relationships between the subsystem devices. This paper will describe how the configuration system easily accomodates recognizing new devices, restructuring existing devices, and modifying device profile information.

Nowell, D.M.

1981-01-01

186

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

187

Active radar stealth device  

Microsoft Academic Search

This patent discloses an active radar stealth device mounted on a host platform for minimizing the radar cross-section of the host platform. A coating which is essentially microwave transparent is attached to the surface of a host platform and is exposed to an incident microwave field. A plurality of detector\\/emitter pairs contained within the coating detect and actively cancel, respectively,

R. N. Cain; Albert J. Corda

1991-01-01

188

Color identification testing device  

NASA Technical Reports Server (NTRS)

Testing device, which determines ability of a technician to identify color-coded electric wires, is superior to standard color blindness tests. It tests speed of wire selection, detects partial color blindness, allows rapid testing, and may be administered by a color blind person.

Brawner, E. L.; Martin, R.; Pate, W.

1970-01-01

189

Plasma Focus Device Study.  

National Technical Information Service (NTIS)

A program to determine the X-ray and neutron yields from a plasma focus device as a function of capacitor bank energy was carried out. The capacitor bank energy was varied from 20 kJ to 90 kJ, and empirical scaling laws were determined. In addition, X-ray...

H. F. Rugge D. E. Maxwell S. A. Zwick

1967-01-01

190

Plasma focus devices  

Microsoft Academic Search

The paper examines the principle of operation and the characteristic plasma properties (dimensions of the plasma focus, density, lifetime and macroscopic instability, electric and magnetic fields, electron temperature, turbulence, electron beams, and X-ray emission, ion temperature, ion distribution function, neutron emission) of plasma focus devices. The plasma focus is considered as a source of neutrons, energy, light and X-rays, and

G. Decker; R. Wienecke

1976-01-01

191

Spring Type Dogging Device.  

National Technical Information Service (NTIS)

The patent application describes a clamping device for securing a workpiece such as an electronic package to a support such as a heat sink. A curved slot is machined around a central opening in the body of a configurated flat metal clamp having an extendi...

J. A. Rew

1976-01-01

192

Radiations from Display Devices.  

National Technical Information Service (NTIS)

45 display devices have been analyzed for X-ray emission and for electrostatic - and low-frequency magnetic fields. 3 have been further analyzed for UV and visible light emission. No emissions above established risk levels have been found. For low-frequen...

L. E. Paulsson I. Kristiansson J. Malmstroem

1984-01-01

193

Semiconductor laser device modeling  

Microsoft Academic Search

The semiconductor laser offers enormous advantages as a practical device in many technological applications because of its very large gain per unit length. This translates into compact size, making it an ideal system for integration into complex integrated opto-electronic systems networks. However, this advantage comes at a price. Achieving large gain in small volumes introduces significant thermal and electrical transport

J. V. Moloney

2000-01-01

194

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

195

Optical Switching Devices.  

National Technical Information Service (NTIS)

An optical switching device employs a rare earth bis-phthalocyanine having third-order nonlinear susceptibilities. In a preferred optical switch, the rare earth bis-phthalocyanine is employed as a nonlinear optical material body that fills the space betwe...

M. E. Boyle J. S. Shirk

1991-01-01

196

Stored Charged Device.  

National Technical Information Service (NTIS)

The development of a stored charge device is discussed. A thin film metal layer is embedded between two insulating films used in a metal-nitride- oxide-silicon field effect transistor. The embedded metal layer provides a two-terminal, thin film, stored ch...

J. Maserjian G. W. Lewicki

1971-01-01

197

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

198

Bidirectional Flow Control Device.  

National Technical Information Service (NTIS)

A bidirectional fluid flow control device is described, which has a longitudinally movable plate penetrrated by a number of orifices. The plate is disposed in a chamber transverse to the fluid stream in a manner such that fluid pressure causes the plate t...

R. F. Sutton

1971-01-01

199

Solar Innovator | Alta Devices  

ScienceCinema

Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

Mattos, Laila; Le, Minh

2013-05-29

200

Ocean wave energy device  

Microsoft Academic Search

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

J. P. LaStella; M. G. Tornabene

1986-01-01

201

Resistive changing device  

US Patent & Trademark Office Database

A device that incorporates teachings of the present disclosure may include, for example, a memory array having a first array of nanotubes, a second array of nanotubes, and a resistive change material located between the first and second array of nanotubes. Other embodiments are disclosed.

2013-11-19

202

Energy Absorption Device.  

National Technical Information Service (NTIS)

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 th...

N. A. Hertelendy

1987-01-01

203

Spring orthotic device  

US Patent & Trademark Office Database

A spring orthotic device comprising a cradle for contacting the foot of a user, a spring plate underneath the cradle, a ventral pivot beneath the spring plate, and a dorsal pivot above the spring plate and below the cradle located proximally of the ventral pivot.

2013-01-15

204

Lift Sling Emplacement Device.  

National Technical Information Service (NTIS)

The present invention relates generally to the field of retrieval of sunken objects and also to the field of securing and lifting devices. Attachment of lifting lines to sunken objects using remote controlled manipulators is one of the most difficult task...

D. J. Hackman D. W. Caudy R. L. Wernli C. S. Albro

1981-01-01

205

Musculosketal Loading Device.  

National Technical Information Service (NTIS)

A device for non-invasively mechanically stimulating bone or muscle includes a vibrational energy generator for applying vibrational energy to a first end of a length of a tissue which includes bone and/or muscle. The vibrational energy is for inducing st...

J. M. Leismer

2006-01-01

206

Nuclear reactor safety device  

Microsoft Academic Search

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

Hutter

1983-01-01

207

Nuclear reactor safety device  

Microsoft Academic Search

In a nuclear reactor having a core, a coolant for contacting and cooling the core, at least one control rod movable axially relative to the core for varying the power output of the reactor, and control means for moving the control rod to regulate the power output, a safety device is described to afford additional protection against an upward thermal

Hutter

1986-01-01

208

Device Oriented Project Controller  

SciTech Connect

This proposal is directed at the issue of developing control systems for very large HEP projects. A de-facto standard in accelerator control is the Experimental Physics and Industrial Control System (EPICS), which has been applied successfully to many physics projects. EPICS is a channel based system that requires that each channel of each device be configured and controlled. In Phase I, the feasibility of a device oriented extension to the distributed channel database was demonstrated by prototyping a device aware version of an EPICS I/O controller that functions with the current version of the channel access communication protocol. Extensions have been made to the grammar to define the database. Only a multi-stage position controller with limit switches was developed in the demonstration, but the grammar should support a full range of functional record types. In phase II, a full set of record types will be developed to support all existing record types, a set of process control functions for closed loop control, and support for experimental beam line control. A tool to configure these records will be developed. A communication protocol will be developed or extensions will be made to Channel Access to support introspection of components of a device. Performance bench marks will be made on both communication protocol and the database. After these records and performance tests are under way, a second of the grammar will be undertaken.

Dalesio, Leo; Kraimer, Martin

2013-11-20

209

Superlattice optical device  

DOEpatents

A semiconductor optical device which includes a superlattice having direct transitions between conduction band and valence band states with the same wave vector, the superlattice being formed from a plurality of alternating layers of two or more different materials, at least the material with the smallest bandgap being an indirect bandgap material.

Biefeld, Robert M. (Albuquerque, NM); Fritz, Ian J. (Albuquerque, NM); Gourley, Paul L. (Albuquerque, NM); Osbourn, Gordon C. (Albuquerque, NM)

1986-01-01

210

Condensate removal device  

DOEpatents

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, James W. (Newport News, VA); Berger, David D. (Alexandria, VA)

1984-01-01

211

Electron Bunching Device.  

National Technical Information Service (NTIS)

The electronic beam consolidating device, e.g. for drawing discharging particles into a closer relation with one another, consists of the cathode, directing electrode and anode fitted with holes (or slits), and a resonance system which is excited by the g...

A. D. Sushkov

1972-01-01

212

High Density Memory Device.  

National Technical Information Service (NTIS)

This invention provides novel high density memory devices that are electrically addressable permitting effective reading and writing, that provide a high memory density (e.g., 10.sup.15 bits/cm.sup.3), that provide a high degree of fault tolerance, and th...

D. E. Bocian D. T. Gryko J. Lindsey P. C. Clausen W. G. Kuhr

2005-01-01

213

Pyrotechnic device technology.  

National Technical Information Service (NTIS)

This talk was given at the 14th International Pyrotechnic Seminar on September 21, 1989, in Jersey, United Kingdom, as one of two plenary lectures. It briefly surveys the current technology of pyrotechnic devices and examines trends for the future. The ''...

P. D. Wilcox

1989-01-01

214

Adjustable locking device  

NASA Technical Reports Server (NTRS)

Adjustable locking device is used for taking up end play of shaft without displacing shaft radially. Coincidentally threaded collars fastened to one or both ends of shaft are threaded in and out of one another for adjustment of end play. Intrinsic feature is its ability to be locked in any translatory position without axial displacement of shaft.

Fincannon, O. J.

1972-01-01

215

Gun storage device  

US Patent & Trademark Office Database

A storage device provides for the secure storage of a gun in a vehicle, includes a rectangular base plate and a box-like cover having a rectangular top and sidewalls that form a chamber for storing a gun. The sidewalls enclose a rectangular area that corresponds substantially to the area of the base plate so that the cover forms a close fit around the base plate, which has a planar central portion joined to and surrounded by upwardly bent elongated edge portions. The base plate and cover each include an aperture, each slightly offset from a center point of the base plate central portion and top cover, respectively, but in vertical alignment with each other and with an aperture formed by the trigger guard of a gun stored in the device. The storage device also includes a rotatable pin that is sized to pass through the apertures in the base plate and cover and through the trigger guard of a gun stored in the device. At its plate end, the pin is provided with a base large enough to prevent its passage through the aperture in the plate. The pin is inserted in the plate aperture and extends through the trigger guard of a gun in the storage chamber and through the aperture in the cover. At its cover end, the pin has a transverse bore that accommodates the shank of a portable lock. Locking the lock in the bore of the pin after it has passed through the plate aperture, trigger guard, and cover aperture secures the gun within the storage device.

2000-07-04

216

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

217

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

218

Permanent Implanted Cardiac Assist Device and Total Cardiac Replacement Device.  

National Technical Information Service (NTIS)

Attempts to devise satisfactory permanent mechanical cardiac assist devices and total cardiac replacement devices for humans is being undertaken by a number of investigators, and research in this area by the authors is outlined. (Author)

T. M. Runge E. A. Ripperger K. L. Wiggins D. Havemann

1969-01-01

219

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

220

Jamming in Microfluidic Devices  

NASA Astrophysics Data System (ADS)

Systems of grains, colloids, and foams cease to flow, or jam, under poorly understood conditions. The phase transition common to these jamming phenomena depends on imposed load, temperature, and packing fraction. We study microfluidic jamming by flowing aqueous suspensions of sub-micron fluorescent polystyrene spheres through a microfluidic device. The device consists of a single wide channel followed by parallel rows of varying-size posts. These posts focus the bead flow into micron-sized channels, allowing us to control the particle volume fraction. Varying the particle size and the flow rate of the suspension allows us to indirectly control the importance of thermal effects and the applied load on the particles. Preliminary results show that bidisperse suspensions jam more readily at a lower flow rate, whereas monodisperse suspensions require ten times higher flow rates to jam. These results suggest that jamming transitions depend strongly on polydispersity.

Ortiz, Carlos; Daniels, Karen; Riehn, Robert

2008-10-01

221

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

222

Microelectromechanical safe arm device  

SciTech Connect

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

223

Local laboratory ventilation devices  

SciTech Connect

This article is a discussion of the ``other`` laboratory ventilation devices described in OSHA`s laboratory standard that could be used in lieu of traditional chemical fume hoods. The reference ``local`` or ``other`` ventilation device is used with little or no information provided as to the type, design, or performance criteria appropriate for specific applications, as was done in excruciating detail for their fume hood cousins. Equally curious is the fact that no performance test criteria were established for this category of equipment. Therefore, great care must be taken by the designer to determine the specific application intended for each unit specified and confirm that its use is appropriate for the task. In light of these standards, manufacturers have responded with many new and innovative products.

Koenigsberg, J. [GPR Planners Collaborative, White Plains, NY (United States)

1995-10-01

224

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) [Idaho Falls, ID

2010-01-05

225

Motion restraining device  

NASA Technical Reports Server (NTRS)

A motion-restraining device for dissipating at a controlled rate the force of a moving body is discussed. The device is characterized by a drive shaft adapted to be driven in rotation by a moving body connected to a tape wound about a reel mounted on the drive shaft, and an elongated pitman link having one end pivotally connected to the crankshaft and the opposite end thereof connected with the mass through an energy dissipating linkage. A shuttle is disposed within a slot and guided by rectilinear motion between a pair of spaced impact surfaces. Reaction forces applied at impact of the shuttle with the impact surfaces include oppositely projected force components angularly related to the direction of the applied impact forces.

Ford, A. G. (inventor)

1977-01-01

226

Light modulating device  

DOEpatents

In a device for transmitting light, means for controlling the transmissivity of the device, including a ceramic, reversibly electrochromic, crystalline element having a highly reflective state when injected with electrons and charge compensating ions and a highly transmissive state when the electrons and ions are removed, the crystalline element being characterized as having a reflectivity of at least 50% in the reflective state and not greater than 10% in the transmissive state, and means for modulating the crystalline element between the reflective and transmissive states by injecting ions into the crystalline element in response to an applied electrical current of a first polarity and removing the ions in response to an applied electrical current of a second polarity.

Rauh, R. David (Newton, MA); Goldner, Ronald B. (Lexington, MA)

1989-01-01

227

Light modulating device  

DOEpatents

In a device for transmitting light, means for controlling the transmissivity of the device, including a ceramic, reversibly electrochromic, crystalline element having a highly reflective state when injected with electrons and charge compensating ions and a highly transmissive state when the electrons and ions are removed, the crystalline element being characterized as having a reflectivity of at least 50% in the reflective state and not greater than 10% in the transmissive state, and means for modulating the crystalline element between the reflective and transmissive states by injecting ions into the crystalline element in response to an applied electrical current of a first polarity and removing the ions in response to an applied electrical current of a second polarity are disclosed. 1 fig.

Rauh, R.D.; Goldner, R.B.

1989-12-26

228

Urine collection device  

NASA Technical Reports Server (NTRS)

A urine collection device for females is described. It is comprised of a collection element defining a urine collection chamber and an inlet opening into the chamber and is adapted to be disposed in surrounding relation to the urethral opening of the user. A drainage conduit is connected to the collection element in communication with the chamber whereby the chamber and conduit together comprise a urine flow pathway for carrying urine generally away from the inlet. A first body of wicking material is mounted adjacent the collection element and extends at least partially into the flow pathway. The device preferably also comprise a vaginal insert element including a seal portion for preventing the entry of urine into the vagina.

Michaud, R. B. (inventor)

1981-01-01

229

Anti-gravity device  

NASA Technical Reports Server (NTRS)

An educational toy useful in demonstrating fundamental concepts regarding the laws of gravity is described. The device comprises a sphere 10 of radius r resting on top of sphere 12 of radius R. The center of gravity of sphere 10 is displaced from its geometrical center by distance D. The dimensions are so related that D((R+r)/r) is greater than r. With the center of gravity of sphere 10 lying on a vertical line, the device is in equilibrium. When sphere 10 is rolled on the surface of sphere 12 it will return to its equilibrium position upon release. This creates an illusion that sphere 10 is defying the laws of gravity. In reality, due to the above noted relationship of D, R, and r, the center of gravity of sphere 10 rises from its equilibrium position as it rolls a short distance up or down the surface of sphere 12.

Palsingh, S. (inventor)

1975-01-01

230

Nuclear reactor safety device  

DOEpatents

A safety device is disclosed for use in a nuclear reactor for axially repositioning a control rod with respect to the reactor core in the event of an upward thermal excursion. Such safety device comprises a laminated helical ribbon configured as a tube-like helical coil having contiguous helical turns with slidably abutting edges. The helical coil is disclosed as a portion of a drive member connected axially to the control rod. The laminated ribbon is formed of outer and inner laminae. The material of the outer lamina has a greater thermal coefficient of expansion than the material of the inner lamina. In the event of an upward thermal excursion, the laminated helical coil curls inwardly to a smaller diameter. Such inward curling causes the total length of the helical coil to increase by a substantial increment, so that the control rod is axially repositioned by a corresponding amount to reduce the power output of the reactor.

Hutter, Ernest (Wilmette, IL)

1986-01-01

231

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

232

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

233

Active radar stealth device  

NASA Astrophysics Data System (ADS)

This patent discloses an active radar stealth device mounted on a host platform for minimizing the radar cross-section of the host platform. A coating which is essentially microwave transparent is attached to the surface of a host platform and is exposed to an incident microwave field. A plurality of detector/emitter pairs contained within the coating detect and actively cancel, respectively, the microwave field at each respective detector/emitter pair.

Cain, R. N.; Corda, Albert J.

1991-07-01

234

Alignment reference device  

DOEpatents

An alignment reference device provides a collimated laser beam that minimizes angular deviations therein. A laser beam source outputs the beam into a single mode optical fiber. The output end of the optical fiber acts as a source of radiant energy and is positioned at the focal point of a lens system where the focal point is positioned within the lens. The output beam reflects off a mirror back to the lens that produces a collimated beam.

Patton, Gail Y. (Sunnyvale, CA) [Sunnyvale, CA; Torgerson, Darrel D. (Palo Alto, CA) [Palo Alto, CA

1987-01-01

235

Residual gas analysis device  

DOEpatents

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

236

XY displacement device  

Microsoft Academic Search

An XY-displacement device (1) with a four-fold symmetry comprises a reference frame (10); an object mount (20) for holding an object (22) to be displaced; an X-manipulator (100) coupled between the reference frame (10) and the object mount (20), which provides a rigid coupling between the object mount (20) and a piezoelectric X-actuator (140), allows a Y-displacement of the object

W. C. Heerens; C. D. Laham; A. E. Holman

1997-01-01

237

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

238

Entrapped devices after PCI.  

PubMed

In contemporary practice, entrapped devices are rarely encountered during percutaneous coronary intervention (PCI) but can be associated with serious morbidity and mortality. We present a case of a 62 y/o male who presented with an acute coronary syndrome. Revascularization was performed and complicated by guide wire entrapment and fracture. Cardiologists should be aware of this complication and the treatment options available. PMID:24268640

Alomari, Ihab; Snider, Richard; Ponce, Sonia; Ahmed, Bina

2014-04-01

239

Optical displacement measuring device  

Microsoft Academic Search

Theoretical considerations of a lightweight, frictionless, optical displacement measuring device (ODMD) are discussed. Experimental results show its resolution and accuracy to be better than 2.5 x 10 to the -8th m with a linear range of 7.5 x 10 to the -5th m, and less than 0.2% change of voltage signal in 600 hours; it has high cycling ability, no

G. F. Weissmann; H. L. Carter Jr.; R. R. Hart

1979-01-01

240

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) [Albuquerque, NM; Liu, Jun (Albuquerque, NM) [Albuquerque, NM

2008-10-21

241

Unconventional plasma focus devices  

Microsoft Academic Search

The Plasma Focus (PF) characteristics have been investigated in the Two-Guns configuration (TWIN) with a 10-kJ class device. Electrodes with two different heads shapes, hollow (GYN) or hemispherical (PHAL), have been tested and the results show that the neutron yield is greater in the GYN configuration. In simple Two-Guns configuration, with the two anodes facing frontally in the vacuum vessel,

Maurizio Samuelli; Luigi Rapezzi; Maurizio Angelone; Mario Pillon; Massimo Rapisarda; Silvia Vitulli

2006-01-01

242

Atmospheric autorotating imaging device  

NASA Technical Reports Server (NTRS)

An imaging device that automatically rotates upon descent through an atmosphere provides an onboard image detector a sweeping panoramic scan as it descends. No moving parts or propulsion system are required. The location, angle and pitch of the winged structure, together with its inertia properties, passively induces rotation. The angled location of the image detector takes advantage of the resulting rotation. Data generated by the image detector may be transmitted to a remote receiver or, alternatively, stored for subsequent recovery.

Burke, James D. (Inventor)

1989-01-01

243

Microfluidic blood filtration device  

Microsoft Academic Search

Rapid decentralized biomedical diagnostics have become increasingly necessary in a medical environment of growing costs and\\u000a mounting demands on healthcare personnel and infrastructure. Such diagnostics require low-cost novel devices that can operate\\u000a at bedside or in doctor offices using small amounts of sample that can be extracted and processed on the spot. Thus, point-of-care\\u000a sample preparation is an important component

George Maltezos; John Lee; Aditya Rajagopal; Kee Scholten; Emil Kartalov; Axel Scherer

2011-01-01

244

Cubic Display Device \\  

Microsoft Academic Search

Z-agon is a device with six-face displays which is constructed in the shape of a cube. We assume that Z-agon will be used as a portable movie player. Designing practical product, we propose a new ubiquitous interface in the media design. We made a movie to show up its form and exam its future needs and uses for the design.

Junya Ueda; Takashi Matsumoto; Naohito Okude

245

Power transmission device  

SciTech Connect

This patent describes a multistage gear shifting device for a motor vehicle in which first speed to fourth speed gear trains and reverse gear trains are arranged between two shafts in an order such that a low speed gear train comes first, one gear of each gear train being able to engage with and disengage from one of the two shafts through a hydraulic clutch, the gear shifting device including a manual valve which has operating positions corresponding to first speed to fourth speed and reverse and which is adapted to selectively operate hydraulic clutches for the respective gear trains, the one gear of the fourth speed gear train and one gear of the reverse gear train being integrally formed with each other and loosely fitting on one of two shafts and detachably engaged with one of the two shafts through a common hydraulic clutch, the other gears of the fourth speed and reverse gear trains being loosely fitting on the other shaft, the multistage gear shifting device including a selector for selectively engaging the other gears of the fourth speed and reverse gear trains, an actuator for actuating the selector in response to the action of the manual valve, and a switching valve annexed to the actuator, the switching valve guiding hydraulic oil from the manual valve to the common hydraulic clutch when the manual valve is brought to an operating position corresponding to fourth speed or reverse and discharging the hydraulic oil in the common hydraulic clutch to a drain through the manual valve.

Nishimura, S.; Kishizawa, Y.; Kato, Y.

1988-11-22

246

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

247

Thermal lens detection device.  

PubMed

A thermal lens detection device was developed to realize an easy-to-use, portable and sensitive detector for nonfluorescent molecules. Two laser diodes (658 nm for excitation and 785 nm for probe) were made coaxial in an optical unit and were coupled to a single-mode optical fiber. On a microfluidic chip, a small holder for the optical fiber was fixed, and micro-lenses (numerical aperture of 0.2) were also integrated inside the holder. The micro-lenses were designed to realize an adequate chromatic aberration (50 ?m), which was essential for sensitive thermal lens detection. Compared with conventional thermal lens detection systems which required very laborious and accurate optical alignment with the microchannel, the new device needed just attachment-detachment of the optical fiber, which was important for practical application. The lower limit of detection was 10 nM for nickel(II) phthalocyaninetetrasulfonic acid tetrasodium salt solutions (model sample), and the absorbance was 9 × 10(-6) AU. The absolute number of molecules detected was less than 200 zmol. The coefficient of variance for 5-time attachment-detachment of the optical probe was as small as 3.6%. The technical development allowed integration of the thermal lens detection devices inside a microsystem (e.g. enzyme-linked immuno-sorbent assay system), and practical microsystems were realized with sensitivities several-orders higher than absorptiometry. PMID:21738939

Mawatari, Kazuma; Ohashi, Toshinori; Ebata, Tomohiko; Tokeshi, Manabu; Kitamori, Takehiko

2011-09-01

248

Modeling spintronic devices  

NASA Astrophysics Data System (ADS)

Conventional spintronic devices are based on metallic magnetic multilayers which utilize the magnetic moment associated with the spin to read magnetically stored information, leading to a nonvolatility and a substantial improvement in the performance of computer hard drives and magnetic random access memories. However, these applications employ two-terminal spin valves which are of limited use for advanced functionalities appropriate for signal processing and digital logic. While semiconductor-based three-terminal devices are natural candidates for spin logic, they remain inadequately investigated and even a simple understanding of their integration with CMOS is still missing [1]. We illustrate here several basic elements for modeling spin transport in spintronic devices and propose schemes for spin injection and detection in silicon [2], as well as for spin-controlled gain [1,3]. Supported by the US ONR, DARPA, and the National Research Council. [1] I. Zutic, J. Fabian, S. Das Sarma, Rev. Mod. Phys. 76, 323 (2004). [2] I. Zutic, J. Fabian, and S. C. Erwin, eprint: cond-mat/0412580. [3] J. Fabian and I. Zutic, Appl. Phys. Lett. 86, 133506 (2005); Phys. Rev. B 69 115314 (2004).

Zutic, Igor; Fabian, Jaroslav; Erwin, Steven

2006-03-01

249

Barriers to medical device innovation  

PubMed Central

The US Food and Drug Administration (FDA) has defined a medical device as a health care product that does not achieve it’s purpose by chemical action or by being metabolized. This means that a vast number of products are considered medical devices. Such devices play an essential role in the practice of medicine. The FDA classifies medical devices in three classes, depending on the risk of the device. Since Class I and II devices have relatively simple requirements for getting to the market, this review will focus on “implantable devices”, which, in general, belong to Class III. The European Union and Canada use a slightly different classification system. While early generations of medical devices were introduced without much testing, either technical or clinical, the process of introducing a Class III medical device from concept to clinical practice has become strongly regulated and requires extensive technological and clinical testing. The modern era of implantable medical devices may be considered to have started in the 1920s with development of artificial hips. The implantable pacemaker was another milestone and pacemakers and cardioverters/defibrillators have since saved millions of lives and created commercial giants in the medical device industry. This review will include some examples of cardiovascular devices. Similar considerations apply to the total implantable device market, although clinical and technological applications obviously vary considerably.

Bergsland, Jacob; Elle, Ole Jakob; Fosse, Erik

2014-01-01

250

Liquid Crystal Devices and Devices for Liquid Crystal Research  

Microsoft Academic Search

In this paper we focus on liquid crystal Fabry-Perot as a liquid crystal device which can also be used to obtain information about the liquid crystal materials used in these devices. The paper outlines the evolution form the simple need of such a device to the construction and testing which led to some unexpected results. Through analysis of these results

J. S. Patel

1997-01-01

251

77 FR 60720 - Certain Electronic Devices, Including Wireless Commmunication Devices, Portable Music and Data...  

Federal Register 2010, 2011, 2012, 2013

...Devices, Including Wireless Commmunication Devices, Portable Music and Data Processing Devices, and Tablet Computers; Notice...devices, including wireless communication devices, portable music and data processing devices, and tablet computers,...

2012-10-04

252

77 FR 51571 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...  

Federal Register 2010, 2011, 2012, 2013

...Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...wireless communication devices, portable music and data processing devices,...

2012-08-24

253

77 FR 58576 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...  

Federal Register 2010, 2011, 2012, 2013

...Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...wireless communication devices, portable music and data processing devices, computers...wireless communication devices, portable music and data processing devices,...

2012-09-21

254

76 FR 45860 - In the Matter of Certain Electronic Devices, Including Wireless Communication Devices, Portable...  

Federal Register 2010, 2011, 2012, 2013

...Wireless Communication Devices, Portable Music and Data Processing Devices, and Tablet...wireless communication devices, portable music and data processing devices, and tablet...wireless communication devices, portable music and data processing devices, and...

2011-08-01

255

78 FR 34669 - Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data...  

Federal Register 2010, 2011, 2012, 2013

...Wireless Communication Devices, Portable Music and Data Processing Devices, and Tablet...wireless communication devices, portable music and data processing devices, and tablet...wireless communication devices, portable music and data processing devices, and...

2013-06-10

256

78 FR 16865 - Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data...  

Federal Register 2010, 2011, 2012, 2013

...Devices, Including Wireless Communication Devices, Portable Music and Data Processing Devices, and Tablet Computers; Investigations...devices, including wireless communication devices, portable music and data processing devices, and tablet computers, by...

2013-03-19

257

77 FR 70464 - Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data...  

Federal Register 2010, 2011, 2012, 2013

...Devices, Including Wireless Communication Devices, Portable Music and Data Processing Devices, and Tablet Computers; Notice...devices, including wireless communication devices, portable music and data processing devices, and tablet computers, by...

2012-11-26

258

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

259

Electronic Computers and Analog Devices.  

National Technical Information Service (NTIS)

The handbook presents a classification of electronic and analog computers and analog devices, including descriptions, basic technical features and fields of application of domestically-manufactured universal digital computers, digital control devices, dig...

V. I. Grubov V. S. Kirdan

1971-01-01

260

RF Photonics Materials and Devices.  

National Technical Information Service (NTIS)

Our MURI research team has developed several innovative materials and devices that would enable a quantum leap in the performance of RF Photonic systems. We have also applied these devices to several novel system concepts and achieved world record perform...

M. C. Wu H. Fetterman T. Itoh B. Jalali E. Yablonovitch

2004-01-01

261

Patent ductus arteriosus device embolization.  

PubMed

Nonsurgical closure of patent ductus arteriosus (PDA) using a duct occluder placed percutaneously is currently the first line of therapy and the success rate is quite high. Several devices are currently available. An eight year child underwent device closure of the ductus. However after deployment of the device it, became dislodged into the left pulmonary artery. Several attempts at catheter retrieval failed. The child underwent successful surgical removal of the device without cardiopulmonary bypass. PMID:22368567

Iqbal, K; Ali, Sm; Tramboo, Na; Lone, Aa; Kaul, S; Kaul, N; Hafiz, I

2011-01-01

262

Pyrotechnic devices and their applications  

Microsoft Academic Search

Pyroshock is mechanical shock transmitted through structures from explosive devices, sometimes accompanied by structural impact. These devices are designed to cause the intentional separation of structures, or to cause the deployment of various mechanisms or subsystems required for mission operation. Separation devices usually fall into two categories: (a) line sources, such as linear shaped charges, and (b) point sources, such

Harry Himelblau

2002-01-01

263

Risk Management and Biomedical Devices  

Microsoft Academic Search

A method of ranking devices for replacement has been successfully trialled at Flinders Medical Centre (FMC). Software developed by Flinders Biomedical Engineering (see wwwjbe.org.au) has been distributed to a network of device managers throughout FMC for the entry of easily determined parameters which relate to the likelihood of a device problem occurring and to the consequence of the problem. Algorithms

John Robson; Purdee Yeo; Mike Riches; Tony Carlisle; Noel Kitto

2005-01-01

264

A simplified intraoral surveying device.  

PubMed

This article describes an easily made and used intraoral surveying device that can aid the dentist in transferring needed preparation information from the diagnostic cast. This device also allows checking of the preparations as they are progressing. The device consists of a Proxabrush handle and a drafting lead. PMID:1403881

Netti, C A; Skirvin, D R; Phelan, P R; Jones, T K

1992-06-01

265

Nanowire-based electrochromic devices  

Microsoft Academic Search

This report presents studies performed on high contrast electrochromic devices based on WO3 nanowires. The devices were made in two formats. The first kind was made with vertically oriented nanowires grown on fluorinated tin oxide (FTO) coated glass substrates using a low pressure hot filament CVD process. The devices made with these substrates showed a highly reversible transmission modulation of

S. Gubbala; J. Thangala; M. K. Sunkara

2007-01-01

266

'Atomistic' Simulation of Decanano Devices  

NASA Technical Reports Server (NTRS)

When the devices are scaled to decanano dimensions the discreteness of charge and matter introduces significant 'intrinsic' parameter fluctuations. Atomic level 3D process and device modelling on statistical scale is required to understand the effects, the scale of the fluctuations and to design fluctuation resistant devices.

Asenov, Asen; Brown, A. R.; Davies, J. H.; Kaya, S.; Slavcheva, G.; Saini, Subhash

2000-01-01

267

Device discovery via residential gateways  

Microsoft Academic Search

This paper describes the discovery and interaction of devices in a home network. It defines an innovative device discovery and description framework called 3DF, that integrates existing networking and interoperability protocols. The 3DF framework provides abstract device descriptions with multiple views, dynamic capability changes and driver support in an advanced way, taking into consideration aspects such as reusability, extendibility and

Andrew Wils; Frank Matthijs; Yolande Berbers; Tom Holvoet; Karel De Vlaminck

2002-01-01

268

[Design of SCM inoculation device].  

PubMed

The first step of bacilli culture is inoculation bacteria on culture medium. Designing a device to increase efficiency of inoculation is significative. The new device is controlled by SCM. The stepper motor can drive the culture medium rotating, accelerating, decelerating, overturn and suspending. The device is high practicability and efficient, let inoculation easy for operator. PMID:24839847

Qian, Mingli; Xie, Haiyuan

2014-01-01

269

Modeling of graphene nanoribbon devices.  

PubMed

Recent advances in graphene nanoribbon (GNR) electronic devices provide a concrete context for developing simulation methods, comparing theories to experiments, and using simulations to explore device physics. We present a review on modeling of graphene nanoribbon devices, with an emphasis on electronic and magnetoresistive devices. Device modeling is reviewed in a synergistic perspective with GNR material properties, device characteristics, and circuit requirements. Similarity with and difference to carbon nanotube devices are discussed. Device modeling and simulation results are compared to experimental data, which underlines the importance of theory-experiment collaborations in this field. Importance of the GNR edges, which have a negative impact on the carrier mobility due to edge roughness but offer new possibilities of spintronic devices and edge doping, is emphasized. Advanced device modeling of GNRs needs to have the capability to describe GNR device physics, including three-dimensional electrostatics, quantum and atomistic scale effects, elastic and inelastic scattering processes, electron-electron interaction, edge chemistry, magnetic field modulation, and spintronic and thermoelectric device phenomena. PMID:22875475

Guo, Jing

2012-09-21

270

Modeling of graphene nanoribbon devices  

NASA Astrophysics Data System (ADS)

Recent advances in graphene nanoribbon (GNR) electronic devices provide a concrete context for developing simulation methods, comparing theories to experiments, and using simulations to explore device physics. We present a review on modeling of graphene nanoribbon devices, with an emphasis on electronic and magnetoresistive devices. Device modeling is reviewed in a synergistic perspective with GNR material properties, device characteristics, and circuit requirements. Similarity with and difference to carbon nanotube devices are discussed. Device modeling and simulation results are compared to experimental data, which underlines the importance of theory-experiment collaborations in this field. Importance of the GNR edges, which have a negative impact on the carrier mobility due to edge roughness but offer new possibilities of spintronic devices and edge doping, is emphasized. Advanced device modeling of GNRs needs to have the capability to describe GNR device physics, including three-dimensional electrostatics, quantum and atomistic scale effects, elastic and inelastic scattering processes, electron-electron interaction, edge chemistry, magnetic field modulation, and spintronic and thermoelectric device phenomena.

Guo, Jing

2012-08-01

271

Portable source identification device  

NASA Astrophysics Data System (ADS)

U.S. Customs and Border Protection (CBP) is the primary enforcement agency protecting the nation"s ports of entry. CBP is enhancing its capability to interdict the illicit import of nuclear and radiological materials and devices that may be used by terrorists. Pacific Northwest National Laboratory (PNNL) is providing scientific and technical support to CBP in their goal to enable rapid deployment of nuclear and radiation detection systems at U. S. ports of entry to monitor 100% of the incoming international traffic and cargo while not adversely impacting the operations or throughput of the ports. As the deployment of radiation detection systems proceeds, there is a need to adapt the baseline radiation portal monitor (RPM) system technology to operations at these diverse ports of entry. When screening produces an alarm in the primary inspection RPM, the alarming vehicle is removed from the flow of commerce and the alarm is typically confirmed in a secondary inspection RPM. The portable source identification device (PSID) is a radiation sensor panel (RSP), based on thallium-doped sodium iodide (NaI(Tl)) scintillation detector and gamma spectroscopic analysis hardware and software, mounted on a scissor lift on a small truck. The lift supports a box containing a commercial off-the-shelf (COTS) sodium iodide detector that provides real-time isotopic identification, including neutron detectors to interdict Weapons of Mass Destruction (WMD) and radiation dispersion devices (RDD). The scissor lift will lower the detectors to within a foot off the ground and raise them to approximately 24 feet (7.3 m) in the air, allowing a wide vertical scanning range.

Andersen, Eric S.; Samuel, Todd J.; Gervais, Kevin L.

2005-05-01

272

Nanoimprinted photonic devices  

NASA Astrophysics Data System (ADS)

We introduce a simple yet efficient approach for nanoimprinting sub-50 nm dimensions starting from a low molecular weight plasticized polymer melt. This technique enabled us to successfully imprint versatile large area nanopatterns with high degrees of fidelity and rational control over the residual layers. The key advantage is its reliability in printing versatile nanostructures and nanophotonic devices doped with organic dyes owing to its low processing temperature. Since nanopatterns can be fabricated easily at low costs, this approach offers an easy pathway for achieving excellent nanoimprinted structures for a variety of photonic, electronic and biological research and applications.

Thomas, Jayan; Gangopadhyay, Palash; Munoz, Ramon; Peyghambarian, N.

2010-08-01

273

Micro environmental sensing device  

DOEpatents

A microelectromechanical (MEM) acceleration switch is disclosed which includes a proof mass flexibly connected to a substrate, with the proof mass being moveable in a direction substantially perpendicular to the substrate in response to a sensed acceleration. An electrode on the proof mass contacts one or more electrodes located below the proof mass to provide a switch closure in response to the sensed acceleration. Electrical latching of the switch in the closed position is possible with an optional latching electrode. The MEM acceleration switch, which has applications for use as an environmental sensing device, can be fabricated using micromachining.

Polosky, Marc A. (Tijeras, NM); Lukens, Laurance L. (Tijeras, NM)

2006-05-02

274

Air monitoring device  

NASA Technical Reports Server (NTRS)

An air monitoring device (100) includes an outer casing (101) configured to receive an airflow (102) comprising particulate; a bore (103) located inside the outer casing (101); and a collection probe (104) located inside the outer casing (101), the collection probe (104) being configured such that there is a gap (105) between an exit of the bore (103) and an entrance of the collection probe (104), such that particulate in the airflow (102) having a diameter larger than a threshold flows through an interior of the collection probe (104).

Tissandier, Michael D. (Inventor)

2012-01-01

275

Detached rock evaluation device  

DOEpatents

A rock detachment evaluation device (10) having an energy transducer unit 1) for sensing vibrations imparted to a subject rock (172) for converting the sensed vibrations into electrical signals, a low band pass filter unit (12) for receiving the electrical signal and transmitting only a low frequency segment thereof, a high band pass filter unit (13) for receiving the electrical signals and for transmitting only a high frequency segment thereof, a comparison unit (14) for receiving the low frequency and high frequency signals and for determining the difference in power between the signals, and a display unit (16) for displaying indicia of the difference, which provides a quantitative measure of rock detachment.

Hanson, David R. (Golden, CO)

1986-01-01

276

Multiple quantum well device  

NASA Astrophysics Data System (ADS)

A multiple quantum well device has a wide well and a plurality of narrower wells spaced from each other and sandwiched between a plurality of barriers and with quantum coupling existing between the wells. Semiconductor substrates and optimal well and barrier widths are selected to yield band gaps and charge localization within the wells such that the energy differences between the ground state of the wide well and the N excited states of a narrow wells correspond to the energy of a photon in the desired spectral range.

Schwartz, Carey

1991-07-01

277

Drop foot corrective device  

NASA Technical Reports Server (NTRS)

A light weight, economical device to alleviate a plurality of difficulties encountered in walking by a victim suffering from a drop foot condition is discussed. A legband girdles the leg below the knee and above the calf providing an anchor point for the upper end of a ligament having its lower end attached to a toe of a shoe or a toe on the foot. The ligament is of such length that the foot is supported thereby and retained in a normal position during walking.

Deis, B. C. (inventor)

1986-01-01

278

Advanced Resistive Exercise Device  

NASA Technical Reports Server (NTRS)

The advanced resistive exercise device (ARED), now at the prototype stage of development, is a versatile machine that can be used to perform different customized exercises for which, heretofore, it has been necessary to use different machines. Conceived as a means of helping astronauts and others to maintain muscle and bone strength and endurance in low-gravity environments, the ARED could also prove advantageous in terrestrial settings (e.g., health clubs and military training facilities) in which many users are exercising simultaneously and there is heavy demand for use of exercise machines.

Raboin, Jasen; Niebuhr, Jason; Cruz, Santana; Lamoreaux, chris

2007-01-01

279

Polyfluorenes for Device Applications  

Microsoft Academic Search

This article mainly reviews the approaches that have been proposed to improve the device performance\\u000a of polyfluorene (PF)-based polymer light-emitting diodes (PLEDs). Chemical modifications on main chains,\\u000a side chains, and chain ends of PFs via the incorporation of charge-transport moieties can reduce the hole-\\u000a and electron-injection barriers; while physical manipulation on main-chain structures of PFs, poly(9,9-di-n-octylfluorene) (PFO), after dipping in

Show-An Chen; Hsin-Hung Lu; Chih-Wei Huang

280

Resistive Exercise Device  

NASA Technical Reports Server (NTRS)

An exercise device 10 is particularly well suited for use in low gravity environments, and includes a frame 12 with plurality of resistance elements 30,82 supported in parallel on the frame. A load transfer member 20 is moveable relative to the frame for transferring the applied force to the free end of each captured resistance element. Load selection template 14 is removably secured both to the load transfer member, and a plurality of capture mechanisms engage the free end of corresponding resistance elements. The force applying mechanism 53 may be a handle, harness or other user interface for applying a force to move the load transfer member.

Smith, Damon C. (Inventor)

2005-01-01

281

Inflatable rescue device  

NASA Technical Reports Server (NTRS)

This invention discloses, in one aspect, a personal rescue device for use in outer space which has an inflatable flexible tube with a shaper apparatus herein. Gas under pressure flows through the shaper apparatus and into the flexible tube. The flexible tube is mounted to the shaper so that as it inflates it expands and deploys lengthwise away from the shaper. In one embodiment a housing contains the shaper and the flexible tube and the housing is designed to facilitate movement of the expanding tube from the housing so the expanding tube does not bunch up in the housing.

Swan, Scott A. (inventor)

1995-01-01

282

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.

2013-10-08

283

Letting intrauterine devices lie.  

PubMed

A detailed study of the Lippes loop over 10 years and 27,954 woman-months showed that the pregnancy rate was highest during the 1st 2 years, after which it fell to an annual average of 0.5. The rate of removals for bleeding and pain was also highest during the 1st 2 years, after which it fell more slowly. All expulsions occurred during the 1st 3 years. Women using IUDs are more likely to develop pelvic inflammatory disease than other women. Infection is most common during the 1st year after fitting but may occur at any time. All devices tend to accumulate small deposits of calcium, and this may be associated with some corrosion of the underlying plastic. There is debate as to how long an IUD should remain in the uterus. Clearly it should be removed if it is causing symptoms. The woman who has been wearing her device symptom-free for many years and shows nothing abnormal on pelvic and cytological examination should be allowed to continue as she is, provided that she agrees to return for routine medical examination. This should include a cervical smear at yearly intervals, and immediate reporting if she develops any gynecological symptoms. The IUD should eventually be removed 1-2 years after the menopause; in most cases this will be accomplished without difficulty. PMID:6809099

Pollock, M

1982-08-01

284

Clamp-mount device  

NASA Technical Reports Server (NTRS)

A clamp-mount device is disclosed for mounting equipment to an associated I-beam and the like structural member of the type having oppositely extending flanges wherein the device comprises a base and a pair of oppositely facing clamping members carried diagonally on the base clamping flanges therebetween and having flange receiving openings facing one another. Lock means are carried diagonally by the base opposite the clamping members locking the flanges in the clamping members. A resilient hub is carried centrally of the base engaging and biasing a back side of the flanges maintaining tightly clamped and facilitating use on vertical as well as horizontal members. The base turns about the hub to receive the flanges within the clamping members. Equipment may be secured to the base by any suitable means such as bolts in openings. Slidable gate latches secure the hinged locks in an upright locking position. The resilient hub includes a recess opening formed in the base and a rubber-like pad carried in this opening being depressably and rotatably carried therein.

Clark, K. H. (inventor)

1983-01-01

285

Neuroelectric Virtual Devices  

NASA Technical Reports Server (NTRS)

This paper presents recent results in neuroelectric pattern recognition of electromyographic (EMG) signals used to control virtual computer input devices. The devices are designed to substitute for the functions of both a traditional joystick and keyboard entry method. We demonstrate recognition accuracy through neuroelectric control of a 757 class simulation aircraft landing at San Francisco International Airport using a virtual joystick as shown. This is accomplished by a pilot closing his fist in empty air and performing control movements that are captured by a dry electrode array on the arm which are then analyzed and routed through a flight director permitting full pilot outer loop control of the simulation. We then demonstrate finer grain motor pattern recognition through a virtual keyboard by having a typist tap his traders on a typical desk in a touch typist position. The EMG signals are then translated to keyboard presses and displayed. The paper describes the bioelectric pattern recognition methodology common to both examples. Figure 2 depicts raw EMG data from typing, the numeral '8' and the numeral '9'. These two gestures are very close in appearance and statistical properties yet are distinguishable by our hidden Kharkov model algorithms. Extensions of this work to NASA emissions and robotic control are considered.

Wheeler, Kevin; Jorgensen, Charles

2000-01-01

286

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

287

Thermoplastic tape compaction device  

DOEpatents

A device is disclosed 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. 5 figures.

Campbell, V.W.

1994-12-27

288

Charge coupled devices  

NASA Technical Reports Server (NTRS)

The results are presented of a program to design, fabricate, and test CCD arrays suitable for operation in an electron-bombarded mode. These intensified charge coupled devices have potential application to astronomy as photon-counting arrays. The objectives of this program were to deliver arrays of 250 lines of 400 pixels each and some associated electronics. Some arrays were delivered on tube-compatible headers and some were delivered after incorporation in vacuum tubes. Delivery of these devices required considerable improvements to be made in the processing associated with intensified operation. These improvements resulted in a high yield in the thinning process, reproducible results in the accumulation process, elimination of a dark current source in the accumulation process, solution of a number of header related problems, and the identification of a remaining major source of dark current. Two systematic failure modes were identified and protective measures established. The effects of tube processing on the arrays in the delivered ICCDs were determined and are reported along with the characterization data on the arrays.

Walker, J. W.; Hornbeck, L. J.; Stubbs, D. P.

1977-01-01

289

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

290

Remotely controllable actuating device  

NASA Technical Reports Server (NTRS)

An actuating device can change a position of an active member that remains in substantially the same position in the absence of a force of a predetermined magnitude on the active member. The actuating device comprises a shape-memory alloy actuating member for exerting a force when actuated by changing the temperature thereof, which shape-memory alloy actuating member has a portion for connection to the active member for exerting thereon a force having a magnitude at least as large as the predetermined magnitude for moving the active member to a desired position. Actuation circuitry is provided for actuating the shape-memory alloy actuating member by changing the temperature thereof only for the time necessary to move the active member to the desired position. The invention is particularly useful for changing the position of a camber-adjusting tab on a helicopter rotor blade by using two shape-memory alloy members that can act against each other to adjust dynamic properties of the rotor blade as it is rotating.

McKillip, Jr., Robert M. (Inventor)

1998-01-01

291

Captive Fastener Device  

NASA Technical Reports Server (NTRS)

A captive fastener device is utilized to hold two members together. The device is comprised of a housing which may be securely attached to the first member. Within the housing is a spring which biases a bottom of a first lip of a cup washer. The top of the first lip contacts the top of the housing when the fastener is not engaged. The fastener has a ledge at the bottom of the fastener head which rests on a top surface of a second lip of the cup washer. The bottom surface of the second lip contacts the first member when the fastener has fully engaged the second member to secure the first and second members together. The first lip of the cup washer has a greater diameter than the second lip. The first lip also has a greater diameter than the fastener. When the fastener is not engaged, a top surface of the first lip engages a bottom surface of the top of the housing. The housing top has an access hole of smaller diameter than the outer diameter of the fastener head which retains the fastener within the housing when the fastener is not engaging the second member.

Dowling, Timothy Edward (Inventor)

2002-01-01

292

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

293

EDITORIAL: Photonic Crystal Devices  

NASA Astrophysics Data System (ADS)

The engineering of electromagnetic modes at optical frequencies in artificial dielectric structures with periodic and random variation of the refractive index, enabling control of the radiative properties of the materials and photon localization, was first proposed independently by Yablonovitch and John in 1987. It is possible to control the flow of light in the periodic dielectric structures, known as photonic crystals (PC). As light waves scatter within the photonic crystal, destructive interference cancels out light of certain wavelengths, thereby forming a photonic bandgap, similar to the energy bandgap for electron waves in a semiconductor. Photons whose energies lie within the gap cannot propagate through the periodic structure. This property can be used to make a low-loss cavity. If a point defect, such as one or more missing periods, is introduced into the periodic structure a region is obtained within which the otherwise forbidden wavelengths can be locally trapped. This property can be used to realize photonic microcavities. Similarly, a line of defects can serve as a waveguide. While the realization of three-dimensional (3D) photonic crystals received considerable attention initially, planar two-dimensional (2D) structures are currently favoured because of their relative ease of fabrication. 2D photonic crystal structures provide most of the functionality of 3D structures. These attributes have generated worldwide research and development of sub-?m and ?m size active and passive photonic devices such as single-mode and non- classical light sources, guided wave devices, resonant cavity detection, and components for optical communication. More recently, photonic crystal guided wave devices are being investigated for application in microfludic and biochemical sensing. Photonic crystal devices have been realized with bulk, quantum well and quantum dot active regions. The Cluster of articles in this issue of Journal of Physics D: Applied Physics provides a glimpse of some of the most recent advances in the application of photonic crystals. The modelling of PC defect-mode cavities are described by Zhou et al. Ye and co-authors describe the concept and realization of a novel 3D silicon-based spiral PC. It is, in fact, the only article on 3D PCs. The design and realization of ultra-high Q heterostructure PC nanocavities are described by Song and co-authors. The concept of self-collimation of light in PCs and its applications are presented by Prather and co-workers. Experimental and numerical studies on the negative refraction related phenomenon in 2D PCs are the subject of the next article by Ozbay and co-authors. The emerging subject of slow light generation, control and propagation in PCs is presented in the next two articles by Baba and Mori and by Krauss. Finally, the progress made in the development of PC microcavity lasers and electrically injected microcavity light emitters and arrays is described, respectively, by O'Brien et al and by Chakravarty et al. It is hoped that readers will get a sense of the exciting developments and the possibilities presented by heterostructure photonic crystals and their devices from reading the articles in this Cluster.

Bhattacharya, Pallab K.

2007-05-01

294

Capacitance measuring device  

DOEpatents

A capacitance measuring circuit is provided in which an unknown capacitance is measured by comparing the charge stored in the unknown capacitor with that stored in a known capacitance. Equal and opposite voltages are repetitively simultaneously switched onto the capacitors through an electronic switch driven by a pulse generator to charge the capacitors during the ''on'' portion of the cycle. The stored charge is compared by summing discharge currents flowing through matched resistors at the input of a current sensor during the ''off'' portion of the switching cycle. The net current measured is thus proportional to the difference in value of the two capacitances. The circuit is capable of providing much needed accuracy and stability to a great variety of capacitance-based measurement devices at a relatively low cost.

Andrews, W.H. Jr.

1984-08-01

295

Cathodochromic storage device  

NASA Technical Reports Server (NTRS)

A memory and display device has been developed by combing a fast phosphor layer with a cathodochromic layer in a cathode ray tube. Images are stored as patterns of electron beam induced optical density in the cathodo-chromic material. The stored information is recovered by exciting the backing, fast phosphor layer with a constant current electron beam and detecting the emitted radiation which is modulated by absorption in the cathodochromic layer. The storage can be accomplished in one or more TV frames (1/30 sec each). More than 500 TV line resolution and close to 2:1 contrast ratio are possible. The information storage time in a dark environment is approximately 24 hours. A reconstituted (readout) electronic video signal can be generated continuously for times in excess of 10 minutes or periodically for several hours.

Bosomworth, D. R.; Moles, W. H.

1969-01-01

296

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

297

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

298

Rotary encoding device  

NASA Technical Reports Server (NTRS)

A device for position encoding of a rotating shaft in which a polygonal mirror having a number of facets is mounted to the shaft and a light beam is directed towards the facets is presented. The facets of the polygonal mirror reflect the light beam such that a light spot is created on a linear array detector. An analog-to-digital converter is connected to the linear array detector for reading the position of the spot on the linear array detector. A microprocessor with memory is connected to the analog-to-digital converter to hold and manipulate the data provided by the analog-to-digital converter on the position of the spot and to compute the position of the shaft based upon the data from the analog-to-digital converter.

Leviton, Douglas B. (inventor)

1993-01-01

299

Linear encoding device  

NASA Technical Reports Server (NTRS)

A Linear Motion Encoding device for measuring the linear motion of a moving object is disclosed in which a light source is mounted on the moving object and a position sensitive detector such as an array photodetector is mounted on a nearby stationary object. The light source emits a light beam directed towards the array photodetector such that a light spot is created on the array. An analog-to-digital converter, connected to the array photodetector is used for reading the position of the spot on the array photodetector. A microprocessor and memory is connected to the analog-to-digital converter to hold and manipulate data provided by the analog-to-digital converter on the position of the spot and to compute the linear displacement of the moving object based upon the data from the analog-to-digital converter.

Leviton, Douglas B. (inventor)

1993-01-01

300

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

301

Capillary interconnect device  

DOEpatents

A manifold for connecting external capillaries to the inlet and/or outlet ports of a microfluidic device for high pressure applications is provided. The fluid connector for coupling at least one fluid conduit to a corresponding port of a substrate that includes: (i) a manifold comprising one or more channels extending therethrough wherein each channel is at least partially threaded, (ii) one or more threaded ferrules each defining a bore extending therethrough with each ferrule supporting a fluid conduit wherein each ferrule is threaded into a channel of the manifold, (iii) a substrate having one or more ports on its upper surface wherein the substrate is positioned below the manifold so that the one or more ports is aligned with the one or more channels of the manifold, and (iv) means for applying an axial compressive force to the substrate to couple the one or more ports of the substrate to a corresponding proximal end of a fluid conduit.

Renzi, Ronald F. (Tracy, CA)

2007-12-25

302

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

303

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. 8 figs.

Marts, D.J.; Richardson, J.G.

1995-10-17

304

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

305

Torsional Magnetorheological Device  

NASA Technical Reports Server (NTRS)

A magnetorheological device comprising a housing having a divider within the housing is disclosed and claimed. A rotary impeller having two paddles is rotatably mounted within the housing. The rotary impeller sealingly engages the divider and the paddles in combination with the divider forms a first chamber and a second chamber. Magnetorheological fluid resides in the chambers and a passageway interconnects the first and second chambers. A coil surrounds a portion of the passageway such that when energized the magnetorheological fluid solidifies plugging the passageway. As the impeller rotates, it pushes the incompressible fluid against the divider in the housing and the plug in the passageway and retards and/or stops the motion of the impeller.

Arnold, Steven M. (Inventor); Penney, Nicholas (Inventor)

2008-01-01

306

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

307

Optical storage device  

NASA Technical Reports Server (NTRS)

A new holographic image storage device which uses four-wave mixing in two photorefractive crystals is described. Photorefractive crystals promise information storage densities on the order of 10(exp 9) to 10(exp 12) bits per cubic centimeter at real-time rates. Several studies in recent years have investigated the use of photorefractive crystals for storing holographic image information. However, all of the previous studies have focused on techniques for storing information in a single crystal. The disadvantage of using a single crystal is that the read process is destructive. Researchers have developed techniques for fixing the information in a crystal so that it may be read many times. However, when fixed, the information cannot be readily erased and overwritten with new information. It two photorefractive crystals are used, holographic image information may be stored dynamically. That is, the stored image information may be read out more than once, and it may be easily erased and overwritten with new image information.

Welch, Sharon S.

1991-01-01

308

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

309

Polarization Perception Device  

NASA Technical Reports Server (NTRS)

A polarization perception device comprises a base and a polarizing filter having opposite broad sides and a centerline perpendicular thereto. The filter is mounted on the base for relative rotation and with a major portion of the area of the filter substantially unobstructed on either side. A motor on the base automatically moves the filter angularly about its centerline at a speed slow enough to permit changes in light transmission by virtue of such movement to be perceived as light-dark pulses by a human observer, but fast enough so that the light phase of each such pulse occurs prior to fading of the light phase image of the preceding pulse from the observer's retina. In addition to an observer viewing a scene in real time through the filter while it is so angularly moved, or instead of such observation, the scene can be photographed, filmed or taped by a camera whose lens is positioned behind the filter.

Whitehead, Victor S. (Inventor); Coulson, Kinsell L. (Inventor)

1997-01-01

310

Polarization perception device  

NASA Technical Reports Server (NTRS)

A polarization perception device comprises a base and a polarizing filter having opposite broad sides and a centerline perpendicular thereto. The filter is mounted on the base for relative rotation and with a major portion of the area of the filter substantially unobstructed on either side. A motor on the base automatically moves the filter angularly about its centerline at a speed slow enough to permit changes in light transmission by virtue of such movement to be perceived as light-dark pulses by a human observer, but fast enough so that the light phase of each such pulse occurs prior to fading of the light phase image of the preceding pulse from the observer's retina. In addition to an observer viewing a scene in real time through the filter while it is so angularly moved, or instead of such observation, the scene can be photographed, filmed or taped by a camera whose lens is positioned behind the filter.

Whitehead, Victor S. (inventor); Coulson, Kinsel L. (inventor)

1992-01-01

311

Monitored separation device  

NASA Technical Reports Server (NTRS)

A device for separating and purifying useful quantities of particles comprises: a. an anolyte reservoir connected to an anode, the anolyte reservoir containing an electrophoresis buffer; b. a catholyte reservoir connected to a cathode, the catholyte reservoir also containing the electrophoresis buffer; c. a power supply connected to the anode and to the cathode; d. a column having a first end inserted into the anolyte reservoir, a second end inserted into the catholyte reservoir, and containing a separation medium; e. a light source; f. a first optical fiber having a first fiber end inserted into the separation medium, and having a second fiber end connected to the light source; g. a photo detector; h. a second optical fiber having a third fiber end inserted into the separation medium, and having a fourth fiber end connected to the photo detector; and i. an ion-exchange membrane in the anolyte reservoir.

Jackson, George William (Inventor); Willson, Richard Coale (Inventor); Fox, George Edward (Inventor)

2011-01-01

312

Electric power source device  

SciTech Connect

An electric power source device is described for a motor vehicle having an ignition switch having an off position, comprising: a casing; a battery with electrolyte; a source of electricity; the battery and the source of electricity being included by the casing; means for conditioning the electrolyte of the battery in such a manner as to prevent a drop in capacity of the battery which might otherwise be caused by ambient temperature where the battery is disposed; connecting means for connecting the source of electricity to the battery to charge the battery, the connecting means including a change-over switch means having a charging mode position for connecting the source of electricity to the battery to charge the battery; and controlling means for controlling the change-over switch means in such a manner for disconnecting the source of electricity from the battery when the ignition switch is turned on.

Nakamura, M.; Takagi, Y.; Urakawa, H.

1987-03-17

313

Multichannel optical sensing device  

DOEpatents

A multichannel optical sensing device is disclosed, for measuring the outdoor 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 optical 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, S.E.

1985-08-16

314

Efficient thermoelectric device  

NASA Technical Reports Server (NTRS)

A high efficiency thermo electric device comprising a multi nanolayer structure of alternating insulator and insulator/metal material that is irradiated across the plane of the layer structure with ionizing radiation. The ionizing radiation produces nanocrystals in the layered structure that increase the electrical conductivity and decrease the thermal conductivity thereby increasing the thermoelectric figure of merit. Figures of merit as high as 2.5 have been achieved using layers of co-deposited gold and silicon dioxide interspersed with layers of silicon dioxide. The gold to silicon dioxide ratio was 0.04. 5 MeV silicon ions were used to irradiate the structure. Other metals and insulators may be substituted. Other ionizing radiation sources may be used. The structure tolerates a wide range of metal to insulator ratio.

Ila, Daryush (Inventor)

2010-01-01

315

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

316

Laser beam steering device  

NASA Technical Reports Server (NTRS)

Agile beam steering is a critical requirement for airborne and space based LIDAR and optical communication systems. Design and test results are presented for a compact beam steering device with low inertia which functions by dithering two complementary (positive and negative) binary optic microlens arrays relative to each other in directions orthogonal to the direction of light propagation. The miniaturized system has been demonstrated at scan frequencies as high as 300 Hz, generating a 13 x 13 spot array with a total field of view of 2.4 degrees. The design is readily extendable to a 9.5 degree field of view and a 52 x 52 scan pattern. The system is compact - less than 2 in. on a side. Further size reductions are anticipated.

Motamedi, M. E.; Andrews, A. P.; Gunning, W. J.

1993-01-01

317

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

318

Silicon Nanowire Devices  

NASA Astrophysics Data System (ADS)

Metal-catalyzed, self-assembled, one-dimensional semiconductor nanowires are being considered as possible device elements to augment and supplant conventional electronics and to extend the use of CMOS beyond the physical and economic limits of conventional technology. Such nanowires can create nanostructures without the complexity and cost of extremely fine scale lithography. The well-known and controllable properties of silicon make silicon nanowires especially attractive. Easy integration with conventional electronics will aid their acceptance and incorporation. For example, connections can be formed to both ends of a nanowire by growing it laterally from a vertical surface formed by etching the top silicon layer of a silicon-on-insulator structure into isolated electrodes. Field-effect structures are one class of devices that can be readily built in silicon nanowires. Because the ratio of surface to volume in a thin nanowire is high, conduction through the nanowire is very sensitive to surface conditions, making it effective as the channel of a field-effect transistor or as the transducing element of a gas or chemical sensor. As the nanowire diameter decreases, a greater fraction of the mobile charge can be modulated by a given external charge, increasing the sensitivity. Having the gate of a nanowire transistor completely surround the nanowire also enhances the sensitivity. For a field-effect sensor to be effective, the charge must be physically close to the nanowire so that the majority of the compensating charge is induced in the nanowire and so that ions in solution do not screen the charge. Because only induced charge is being sensed, a coating that selectively binds the target species should be added to the nanowire surface to distinguish between different species in the analyte. The nanowire work at Hewlett-Packard Laboratories was supported in part by the Defense Advanced Research Projects Agency.

Kamins, Theodore

2006-03-01

319

Engine starter protecting device  

SciTech Connect

This patent describes an engine starter protecting device for an engine starter of a type comprising a starter motor for turning an engine, an electromagnetic switch for controlling the starter motor, a key switch for controlling the electromagnetic switch, and a battery for electrically energizing the starter motor and the electromagnetic switch. The device comprises a first switch operatively associated with the engine, which is closed when the engine is disengaged from wheels and otherwise opened, and second switch means operatively associated with the engine, which is opened when a speed of rotation of the engine is at or above an predetermined value and otherwise closed. The first switch and second switch means are connected in series with one another and coupled between the battery and the electromagnetic switch for controlling actuation of the electromagnetic switch; wherein the second switch means comprises at least two detectors selected from a group consisting of an ignition detector which operates when the frequency of engine ignition pulses is at a predetermined value or higher, an oil pressure detector which operates when an engine lubrication oil pressure is at a predetermined value or higher, a vacuum pressure detector which operates when a pressure of intake air to the engine is at a predetermined value or lower, and a charging detector which operates when an output voltage of an alternator is at a predetermined value or higher. Relay coils are individually coupled to outputs of the detectors, each of the coils being energized when its associated detector operates, and normally closed relay switches are connected in series and individually associated with an opened by the relay coils when energized.

Yabunaka, K.; Hamano, I.; Morishita, A.; Akae, Y.; Nishimura, Y.; Tanaka, T.

1986-11-18

320

21 CFR 882.5050 - Biofeedback device.  

Code of Federal Regulations, 2010 CFR

...5050 Biofeedback device. (a) Identification. A biofeedback device is an instrument...parameters (e.g., brain alpha wave activity...special controls). The device is exempt from the...it is a prescription battery powered device...

2009-04-01

321

21 CFR 882.5050 - Biofeedback device.  

Code of Federal Regulations, 2010 CFR

...5050 Biofeedback device. (a) Identification. A biofeedback device is an instrument...parameters (e.g., brain alpha wave activity...special controls). The device is exempt from the...it is a prescription battery powered device...

2010-04-01

322

Quantum Hydrodynamic Model for Semiconductor Devices.  

National Technical Information Service (NTIS)

Quantum semiconductor devices are playing an increasingly important role in advanced microelectronic applications, including multiple-state logic and memory devices. To model quantum devices, the classical hydrodynamic model for semiconductor devices can ...

C. L. Gardner

1995-01-01

323

Quantum Hydrodynamic Model for Semiconductor Devices.  

National Technical Information Service (NTIS)

Quantum semiconductor devices are playing an increasingly important role in advanced microelectronic applications, including multiple state logic and memory devices. To model quantum devices, the classical hydrodynamic model for semiconductor devices can ...

C. L. Gardner

1995-01-01

324

Candida Infections of Medical Devices  

PubMed Central

The number of indwelling medical devices is escalating, and an increasing proportion of device-related infections are being caused by Candida spp. Candida spp. produce biofilms on synthetic materials, which facilitates adhesion of the organisms to devices and renders them relatively refractory to medical therapy. Management of device-related Candida infections can be challenging. Removal of the infected device is generally needed to establish cure of Candida infections of medical devices. However, since the pathogenesis of Candida bloodstream infection is complicated, more studies are necessary to determine the role of catheter exchange in patients with both gastrointestinal tract mucositis and indwelling catheters. The medical and economic impact of these infections is enormous.

Kojic, Erna M.; Darouiche, Rabih O.

2004-01-01

325

Flexible organic transistor memory devices.  

PubMed

The flexible nonvolatile organic memory devices were developed on the plastic substrates based on the organic thin-film transistors embedding self-assembled gold nanoparticles (Au(NP)). The organic memory devices exhibited good programmable memory characteristics with respect to the program/erase operations, resulting in controllable and reliable threshold voltage shifts. Additionally, the endurance, data retention, and bending cyclic measurements confirmed that the flexible memory devices exhibited good electrical reliability as well as mechanical stability. The memory devices were composed of the solution-processed organic dielectric layers/metallic nanoparticles and the low-temperature processed organic transistors. Therefore, this approach could potentially be applied to advanced flexible/plastic electronic devices as well as integrated organic device circuits. PMID:20578683

Kim, Soo-Jin; Lee, Jang-Sik

2010-08-11

326

76 FR 69033 - Microbiology Devices; Classification of In Vitro Diagnostic Device for Yersinia Species Detection  

Federal Register 2010, 2011, 2012, 2013

...Microbiology Devices; Classification of In Vitro Diagnostic Device for Yersinia Species...Special Controls Guidance Document: In Vitro Diagnostic Devices for Yersinia Species...Microbiology Devices; Classification of In Vitro Diagnostic Device for Yersinia...

2011-11-07

327

76 FR 28689 - Microbiology Devices; Classification of In Vitro Diagnostic Device for Bacillus Species Detection  

Federal Register 2010, 2011, 2012, 2013

...Microbiology Devices; Classification of In Vitro Diagnostic Device for Bacillus Species...Administration (FDA) is proposing to classify in vitro diagnostic devices for Bacillus species...this device. B. Regulatory History of In Vitro Diagnostic Devices for Bacillus Spp....

2011-05-18

328

Combined docking and grasping device  

NASA Technical Reports Server (NTRS)

A combined docking and grasping device for use with a manipulator arm on a docking vehicle and the like for mechanically connecting a docking vehicle with an orbital payload having a receptacle for receiving the device is described. The device includes a pair of opposing jaw members having opposing serrated surfaces for grasping an object and a triangular cam portion on an outer surface for insertion and interlocking with an orbital payload.

Burch, J. L.; Johnston, J. D. (inventors)

1977-01-01

329

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

330

Shape memory actuated release devices  

Microsoft Academic Search

Spacecraft require a variety of separation and release devices to accomplish mission related functions. Current off-the-shelf devices such as pyrotechnics, gas-discharge systems, paraffin wax actuators, and other electro-mechanical devices may not be able to meet future design needs. The use of pyrotechnics on advanced lightweight spacecraft, for example, will expose fragile sensors and electronics to high shock levels and sensitive

Bernie F. Carpenter; Cary Clark; Weyman Weems

1996-01-01

331

New Italian device registration requirements.  

PubMed

A medical device manufacturer located outside Europe was informed by an Italian distributor that the European Authorised Representative must designate the distributor as the authorised entity when registering the manufacturer's devices in Italy in a new online data bank. This is incorrect. This article discusses the new requirements for registering medical devices in Italy, together with the steps in the registration process and common problems encountered. PMID:18557406

Donawa, Maria

2008-01-01

332

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

333

Stabilizing Semiconductor Devices With Hydrogen  

NASA Technical Reports Server (NTRS)

Damage by radiation healed rapidly. Feature provides continuous, rapid recovery of devices from degradation caused by hot electrons, photons, and ionizing radiation. Several candidate sites for palladium film catalysts, inserted during manufacture as integral parts of devices. Paladium films made by evaporation, sputtering, or chemical-vapor deposition. If additional storage required, thick layer of palladium plated on inside of package surrounding device. Hydrogen stored by exposing palladium to hydrogen gas just before package sealed hermetically.

Overhauser, Albert W.; Maserjian, Joseph

1989-01-01

334

Lightning protection devices for high frequencies equipments  

SciTech Connect

Contents: Mechanism of a Lightning Stroke from Antenna to Ground; Principles of Protection Devices for Feeders; Electrical Characteristics of H.F. Protection Devices; Calculation of H.F. Protection Devices; Catalogue Devices for High Frequency Protection; Some Measurement Results for Tees; Measurement Results for Decoupling Line Devices; Installation of High Frequency Devices.

Pierre, J.

1983-01-01

335

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

336

Implantable medical devices MRI safe.  

PubMed

Pacemakers, ICDs, neurostimulators like deep brain stimulator electrodes, spiral cord stimulators, insulin pumps, cochlear implants, retinal implants, hearing aids, electro cardio gram (ECG) leads, or devices in interventional MRI such as vascular guide wires or catheters are affected by MRI magnetic and electromagnetic fields. Design of MRI Safe medical devices requires computer modeling, bench testing, phantom testing, and animal studies. Implanted medical devices can be MRI unsafe, MRI conditional or MRI safe (see glossary). In the following paragraphs we will investigate how to design implanted medical devices MRI safe. PMID:23739365

Dal Molin, Renzo; Hecker, Bertrand

2013-01-01

337

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

338

MR imaging of Devic’s neuromyelitis optica  

Microsoft Academic Search

Devic’s neuromyelitis optica (NMO) is a neurological condition characterized by a severe involvement of the optic nerves and spinal cord in a mono- or multi-phasic manner. Recent pathologic, cerebrospinal fluid and conventional magnetic resonance imaging (MRI) studies have shown abnormalities which might help in differentiating patients with NMO from those with multiple sclerosis. This review article summarizes the main results

M. Filippi; M. A. Rocca

2004-01-01

339

Devic’s neuromyelitis optica: clinical features and prognostic factors  

Microsoft Academic Search

Devic’s neuromyelitis optica (NMO) onset is characterized by optic neuritis (ON) and transverse myelitis (TM), either simultaneously or in isolation. Thereafter, the course of the disease can be monophasic (no other attack) or relapsing (sequences of ON and TM, no other neurological system involved). The risk of having a relapsing course is related to gender, older age at onset, less

R. Bergamaschi; A. Ghezzi

2004-01-01

340

Cerebrospinal fluid findings in Devic’s neuromyelitis optica  

Microsoft Academic Search

Relapsing Devic’s neuromyelitis optica (DNO) may be clinically undistinguishable from multiple sclerosis (MS), thus the differential diagnosis relies mainly on neuroimaging and cerebrospinal fluid (CSF) findings. We studied CSF samples from 44 patients with DNO submitted to at least one lumbar puncture. Pleocytosis, IgG synthesis and blood brain barrier damage were the most frequent abnormalities, pleocytosis being very suggestive of

M. Zaffaroni

2004-01-01

341

Supporting device and apparatus for inserting the device  

US Patent & Trademark Office Database

In connection with herniotomia or laparoscopy a device (12) for supporting the abdominal wall may be passed into the abdominal cavity through a percutaneously arranged guard tube (23) that is preferably inserted in the abdominal cavity through the hernial canal. The supporting device (12) includes a barrier material (13) which may for instance be a synthetic net. The supporting device has a stiffener (14) allowing such a controlled deformation of the barrier material that the supporting device may pass through the guard tube (23), following which the stiffener is capable of unfolding the barrier material into a substantially plane condition. After insertion and unfolding the supporting device (12) may be tightened against the peritoneum (26) by means of a thread (19) that may be fastened on the surface of the patient's skin.

1995-03-14

342

Highly Efficient Multilayer Thermoelectric Devices  

NASA Technical Reports Server (NTRS)

Multilayer thermoelectric devices now at the prototype stage of development exhibit a combination of desirable characteristics, including high figures of merit and high performance/cost ratios. These devices are capable of producing temperature differences of the order of 50 K in operation at or near room temperature. A solvent-free batch process for mass production of these state-of-the-art thermoelectric devices has also been developed. Like prior thermoelectric devices, the present ones have commercial potential mainly by virtue of their utility as means of controlled cooling (and/or, in some cases, heating) of sensors, integrated circuits, and temperature-critical components of scientific instruments. The advantages of thermoelectric devices for such uses include no need for circulating working fluids through or within the devices, generation of little if any noise, and high reliability. The disadvantages of prior thermoelectric devices include high power consumption and relatively low coefficients of performance. The present development program was undertaken in the hope of reducing the magnitudes of the aforementioned disadvantages and, especially, obtaining higher figures of merit for operation at and near room temperature. Accomplishments of the program thus far include development of an algorithm to estimate the heat extracted by, and the maximum temperature drop produced by, a thermoelectric device; solution of the problem of exchange of heat between a thermoelectric cooler and a water-cooled copper block; retrofitting of a vacuum chamber for depositing materials by sputtering; design of masks; and fabrication of multilayer thermoelectric devices of two different designs, denoted I and II. For both the I and II designs, the thicknesses of layers are of the order of nanometers. In devices of design I, nonconsecutive semiconductor layers are electrically connected in series. Devices of design II contain superlattices comprising alternating electron-acceptor (p)-doped and electron-donor (n)-doped, nanometer- thick semiconductor layers.

Boufelfel, Ali

2006-01-01

343

Material bagging device  

DOEpatents

A bagging device for transferring material from one chamber through an opening in a wall to a second chamber includes a cylindrical housing communicating with the opening and defining a passage between the chambers. A cylindrical cartridge is slidably received within the housing. The cartridge has a substantially rigid cylindrical sleeve to which is affixed a pliable tube. The pliable tube is positioned concentrically about the sleeve and has a pleated portion capable of unfolding from the sleeve and a closed end extending over a terminal end of the sleeve. Sealing means are interposed in sealed relationship between the cartridge and the housing. Material from one chamber is inserted into the cartridge secured in the housing and received in the closed end of the tube which unfolds into the other chamber enclosing the material therein. The tube may then be sealed behind the material and then severed to form a bag-like enclosure defined by the tube's closed terminal end and the new seal. The new seal then forms a terminal end for the unsevered portion of the pliable tube into which additional material may be placed and the bagging process repeated.

Wach, Charles G. (Oak Lawn, IL); Nelson, Robert E. (Lombard, IL); Brak, Stephen B. (Tinley Park, IL)

1984-01-01

344

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) [Allentown, PA

1986-01-01

345

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

346

Cable load sensing device  

DOEpatents

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

347

Prosthetic iris devices.  

PubMed

Congenital iris defects may usually present either as subtotal aniridia or colobomatous iris defects. Acquired iris defects are secondary to penetrating iris injury, iatrogenic after surgical excision of iris tumours, collateral trauma after anterior segment surgery, or can be postinflammatory in nature. These iris defects can cause severe visual disability in the form of glare, loss of contrast sensitivity, and loss of best corrected visual acuity. The structural loss of iris can be reconstructed with iris suturing, use of prosthetic iris implants, or by a combination of these, depending on the relative amount of residual iris stromal tissue and health of the underlying pigment epithelium. Since the first implant of a black iris diaphragm posterior chamber intraocular lens in 1994, advances in material and design technology over the last decade have led to advances in the prosthetic material, surgical technique, and instrumentation in the field of prosthetic iris implants. In this article, we review the classification of iris defects, types of iris prosthetic devices, implantation techniques, and complications. PMID:24513351

Srinivasan, Sathish; Ting, Darren S J; Snyder, Michael E; Prasad, Somdutt; Koch, Hans-Reinhard

2014-02-01

348

Laser activated MTOS microwave device  

NASA Technical Reports Server (NTRS)

A light-activated semiconductor device usable as an optoelectronic switch, pulse generator or optical detector is provided. A semiconductor device is disclosed which provides back-to-back metal-thin oxide-silicon (MTOS) capacitors. Each capacitor includes a thin, light-absorptive aluminum electrode which overlies a thin oxide layer and a lightly doped region implanted in an intrinsic silicon substrate.

Maserjian, J. (inventor)

1985-01-01

349

SAW-Modulated Image Device  

NASA Technical Reports Server (NTRS)

Imaging device uses surface-acoustic-wave (SAW) charge transfer for image readout. Spatial resolution of image changed electronically by changing frequency of applied signal. Surface acoustic waves create traveling longitudinal electric fields. These fields create potential wells that carry along stored charges. Charges injected into wells by photoelectric conversion when light strikes device.

Benz, H. F.

1985-01-01

350

Jaw bite force measurement device.  

PubMed

We describe a cost-effective device that uses an off-the-shelf force transducer to measure patient bite force as a diagnostic aid in determining dental implant size, number of implants, and prosthetic design for restoring partial edentulism. The main advantages of the device are its accuracy, simplicity, modularity, ease of manufacturing, and low cost. PMID:20822470

Flanagan, Dennis; Ilies, Horea; O'Brien, Brendan; McManus, Anne; Larrow, Beau

2012-08-01

351

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

352

Segmented hollow cathode laser device  

Microsoft Academic Search

A laser device is described for generating multiline emissions when appropriately energized. The device consists of two major components, an anode-cathode assembly and, in a first embodiment, an adjustable brewster end section or in a second embodiment, an integral mirror end section. The anode-cathode assembly comprises one center located short cylindrical anode and two segmented cylindrical hollow cathodes located symmetrically

R. W. Hamerdinger; S. C. Wang

1981-01-01

353

Device for Tensioning Sheet Members.  

National Technical Information Service (NTIS)

The device for tensioning sheet material applies a tensioning force around the outer edge of a sheet material to prevent the sheet material from wrinkling. These devices are attached to a supporting member forming the outer frame of a structure upon which...

M. A. Brown B. Whalen

1998-01-01

354

Evaluation of Granular Bed Devices.  

National Technical Information Service (NTIS)

Recent interest in dry sorption processes for SO2 removal from hot stack gases has led to investigation of the concept of a dry granular bed device used as a simultaneous SO2 sorber-flyash collector for power station flue gases. In these devices, an SO2 s...

1969-01-01

355

A Simple Audio Conductivity Device.  

ERIC Educational Resources Information Center

Describes a simple audio conductivity device built to address the problem of the lack of sensitivity needed to measure small differences in conductivity in crude conductivity devices. Uses a 9-V battery as a power supply and allows the relative resistance differences between substances to be detected by the frequency of its audible tones. Presents…

Berenato, Gregory; Maynard, David F.

1997-01-01

356

Device-centric spectrum management  

Microsoft Academic Search

Efficient spectrum allocation in open spectrum systems is a challenging problem, particularly for devices with constrained communication resources such as sensor and mobile ad hoc networks. We propose a device-centric spectrum management scheme with low communication costs, where users observe local interference patterns and act independently according to preset spectrum rules. We propose five rules that tradeoff performance with implementation

Haitao Zheng; Lili Cao

2005-01-01

357

Zinc Oxide Based Photonics Devices.  

National Technical Information Service (NTIS)

The objectives of this project are to develop critical technologies required for ZnO-based photonic device; high-quality ZnO film growth, p/n-doping processes, etching processes, and fabrication of ZnO light emitting devices. We have developed such critic...

Y. Ryu H. W. White

2003-01-01

358

NFC Devices: Security and Privacy  

Microsoft Academic Search

The aim of this paper is to show security measures for NFC (Near Field Communication) use cases and devices. We give a brief overview over NFC technology and evaluate the implementation of NFC in devices. Out of this technology review we derive different use cases and applications based on NFC technology. Based on the use cases we show assets and

Gerald Madlmayr; Josef Langer; Christian Kantner; Josef Scharinger

2008-01-01

359

Actuator Device for Artificial Leg.  

National Technical Information Service (NTIS)

An actuator device is provided for moving an artificial leg of a person having a prosthesis replacing an entire leg and hip joint. The device includes an articulated hip joint assembly carried by the natural leg and a second articulated hip joint assembly...

J. L. Burch

1975-01-01

360

Integrated Biological-Semiconductor Devices  

Microsoft Academic Search

The advent of semiconductor devices with nanoscale dimensions creates the potential to integrate nanoelectronics and optoelectronic devices with a great variety of biological systems. Moreover, the advances in nanotechnology are opening the way to achieving direct electrical contact of nanoelectronic structures with electrically and electrochemically active subcellular structures-including ion channels, receptors, and transmembrane proteins such as bacteriorhodopsin. Direct electrical interfacing

MICHAEL A. STROSCIO; MITRA DUTTA

2005-01-01

361

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

362

Nanoscale wicking methods and devices  

NASA Technical Reports Server (NTRS)

A fluid transport method and fluid transport device are disclosed. Nanoscale fibers disposed in a patterned configuration allow transport of a fluid in absence of an external power source. The device may include two or more fluid transport components having different fluid transport efficiencies. The components may be separated by additional fluid transport components, to control fluid flow.

Zhou, Jijie (Inventor); Bronikowski, Michael (Inventor); Noca, Flavio (Inventor); Sansom, Elijah B. (Inventor)

2011-01-01

363

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

364

On 3D Input Devices  

Microsoft Academic Search

We provide an overview of some of our input device developments, which we designed in response to the need for more advanced 3D interfaces. Some of our devices are more task-specific and others are more general, but all of them support six or more degrees of freedom (DOF) and work in three dimensions. In our work, we try to understand

Bernd Fröhlich; Jan Hochstrate; Alexander Kulik; Anke Huckauf

2006-01-01

365

Microwave ferrite materials and devices  

Microsoft Academic Search

The crystal structure of ferrites including garnets and their methods of preparation are first reviewed. This is followed by an examination of microwave ferrite devices and their application to actual systems. Sufficient theoretical details as well as an extensive though not exhaustive list of references are included for ready reference. The most widely used microwave ferrite device is the isolator,

R. Soohoo

1968-01-01

366

A hand gesture interface device  

Microsoft Academic Search

This paper reports on the development of a hand to machine interface device that provides real-time gesture, position and orientation information. The key element is a glove and the device as a whole incorporates a collection of technologies. Analog flex sensors on the glove measure finger bending. Hand position and orientation are measured either by ultrasonics, providing five degrees of

Thomas G. Zimmerman; Jaron Lanier; Chuck Blanchard; Steve Bryson; Young Harvill

1986-01-01

367

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

368

Electrochromic devices on polyester foil  

Microsoft Academic Search

We report on a new flexible electrochromic foil device with sufficient optical modulation range, dynamics, and durability for practical uses. The device incorporates a film of W oxide made by sputtering in the presence of hydrogen, another film of Ni–V oxide made by sputtering and postdeposition treatment in ozone, and a polymer laminate. Applications as variable-transmittance visors in motorcycle helmets

A. Azens; G. Gustavsson; R. Karmhag; C. G. Granqvist

2003-01-01

369

Secondary air feed control device  

Microsoft Academic Search

A secondary air feed control device for an internal combustion engine having in its exhaust system a three way catalytic converter and an oxygen concentration detector is disclosed. This detector provides a signal indicating that the total air-fuel ratio is smaller than the stoichiometric air-fuel ratio. The secondary air feed control device comprises a valve port through which the secondary

1979-01-01

370

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

371

Handheld ultrasound array imaging device  

Microsoft Academic Search

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

Juin-Jet Hwang; Jens Quistgaard

1999-01-01

372

Glass for Solid State Devices  

NASA Technical Reports Server (NTRS)

Glass film has low intrinsic compressive stress for isolating active layers of magnetic-bubble and other solid-state devices. Solid-state device structure incorporates low-stress glasses as barrier and spacer layers. Glass layers mechanically isolate substrate, conductor, and nickel/iron layers.

Bailey, R. F.

1982-01-01

373

Automatic Locking Orthotic Knee Device.  

National Technical Information Service (NTIS)

An articulated tang in clevis joint for incorporation in newly manufactured conventional strap-on orthotic knee devices or for replacing such joints in conventional strap-on orthotic knee devices is discussed. The instant tang in clevis joint allows the u...

B. Weddendorf

1991-01-01

374

Evaluating Devices for Treating Epilepsy  

Microsoft Academic Search

Summary: Purpose: Research into new implantable devices for treating epilepsy is expanding rapidly. Pilot studies sug- gest sufficient safety and potential efficacy to justify proceed- ing with larger scale clinical trials. Understanding the chal- lenges presented by these trials, the testing and approval pro- cess for implantable devices, and how these differ from require- ments for antiepileptic drugs (AEDs) is

Brian Litt

2003-01-01

375

Pyrotechnic devices and their applications  

NASA Astrophysics Data System (ADS)

Pyroshock is mechanical shock transmitted through structures from explosive devices, sometimes accompanied by structural impact. These devices are designed to cause the intentional separation of structures, or to cause the deployment of various mechanisms or subsystems required for mission operation. Separation devices usually fall into two categories: (a) line sources, such as linear shaped charges, and (b) point sources, such as explosive bolts, pin puller and pushers, and gas generators. The advantages of these devices are high reliability (especially when redundantly activated), low cost and weight, high activation speed, and low structural deformation a short distance from the source. The major limitation is pyroshock, a severe high-frequency transient capable of causing failure or malfunction to small nearby elements, especially electronic and optical components located close to the source. This pyroshock tutorial, which is intended to summarize recent improvements to the technology, is initiated with a review of explosive and companion devices.

Himelblau, Harry

2002-05-01

376

Micro-organism-reducing device  

US Patent & Trademark Office Database

The invention relates to a micro-organism reducing device, comprising a radiation device which is provided with a light source, a photosensitive substance which treats the area to be treated and is irradiated by said light source. The aim of said invention is to configure said device in such a way that it is possible to carry out an efficient and controllable treatment by means of operationally low-cost and easily handling apparatus. For this purpose, the inventive device comprises at least one applicator provided with a fiber-optic waveguide. In addition, said applicator and radiation device respectively comprise corresponding liaison bodies contacting one of them in such a way that the light from the light source is emitted towards the treated area by means of the fiber-optic waveguide.

2013-07-16

377

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

378

Automatic Mechetronic Wheel Light Device  

DOEpatents

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

379

Intrauterine devices: an update.  

PubMed

Three intrauterine devices (IUDs) are available in the United States: the copper T 380A and two levonorgestrel-releasing IUDs, one that releases 20 mcg of levonorgestrel per 24 hours, and one that releases 14 mcg per 24 hours. All are safe and effective methods of contraception that work predominantly by prefertilization mechanisms. The copper T 380A IUD may be placed in nonpregnant women at any time in the menstrual cycle. The prescribing information for the 20- and 14-mcg levonorgestrel-releasing IUDs advises that insertion occur during the first seven days of menses. Insertion immediately after vaginal or cesarean delivery may be considered with the copper T 380A and the 20-mcg levonorgestrel-releasing IUDs; however, expulsion rates are higher than with delayed postpartum insertion. The prescribing information for both levonorgestrel-releasing IUDs advises a waiting period of six weeks postpartum or following second-trimester pregnancy loss. Current guidelines indicate that IUDs are acceptable for use in nulliparous women, in adolescents, and in women who are breastfeeding. They may also be used in women who have a history of sexually transmitted infection, although screening is recommended. IUDs should not be inserted for at least three months after resolution of a sexually transmitted infection. Neither antibiotic prophylaxis nor misoprostol use before IUD insertion is beneficial. If pregnancy occurs, the IUD should be removed if feasible. Possible side effects of levonorgestrel-releasing IUDs include headaches, nausea, hair loss, breast tenderness, depression, decreased libido, ovarian cysts, oligomenorrhea, and amenorrhea. The main side effect of the copper T 380A IUD is increased menstrual bleeding, which may continue even with long-term use. PMID:24695563

Hardeman, Julia; Weiss, Barry D

2014-03-15

380

Enteral nutrition access devices.  

PubMed

The ASGE Technology Committee provides reviews of existing, new, or emerging endoscopic technologies that have an impact on the practice of GI endoscopy. Evidence-based methodology is used, performing a MEDLINE literature search to identify pertinent clinical studies on the topic and a MAUDE (U.S. Food and Drug Administration Center for Devices and Radiological Health) database search to identify the reported complications of a given technology. Both are supplemented by accessing the "related articles" feature of PubMed and by scrutinizing pertinent references cited by the identified studies. Controlled clinical trials are emphasized, but, in many cases, data from randomized, controlled trials are lacking. In such situations, large case series, preliminary clinical studies, and expert opinions are used. Technical data are gathered from traditional and Web-based publications, proprietary publications, and informal communications with pertinent vendors. Technology Status Evaluation Reports are drafted by 1 or 2 members of the ASGE Technology Committee, reviewed and edited by the committee as a whole, and approved by the ASGE Governing Board. When financial guidance is indicated, the most recent coding data and list prices at the time of publication are provided. For this review, the MEDLINE database was searched through August 2009 for articles related to endoscopy in patients requiring enteral feeding access by using the keywords "endoscopy," "percutaneous," "gastrostomy," "jejunostomy," "nasogastric," "nasoenteric," "nasojejunal," "transnasal," "feeding tube," "enteric," and "button." Technology Status Evaluation Reports are scientific reviews provided solely for educational and informational purposes. Technology Status Evaluation Reports are not rules and should not be construed as establishing a legal standard of care or as encouraging, advocating, requiring, or discouraging any particular treatment or payment for such treatment. PMID:20541746

Kwon, Richard S; Banerjee, Subhas; Desilets, David; Diehl, David L; Farraye, Francis A; Kaul, Vivek; Mamula, Petar; Pedrosa, Marcos C; Rodriguez, Sarah A; Varadarajulu, Shyam; Song, Louis-Michel Wong Kee; Tierney, William M

2010-08-01

381

Advanced Modeling of Micromirror Devices  

NASA Technical Reports Server (NTRS)

The flexure-beam micromirror device (FBMD) is a phase only piston style spatial light modulator demonstrating properties which can be used for phase adaptive corrective optics. This paper presents a complete study of a square FBMD, from advanced model development through final device testing and model verification. The model relates the electrical and mechanical properties of the device by equating the electrostatic force of a parallel-plate capacitor with the counter-acting spring force of the device's support flexures. The capacitor solution is derived via the Schwartz-Christoffel transformation such that the final solution accounts for non-ideal electric fields. The complete model describes the behavior of any piston-style device, given its design geometry and material properties. It includes operational parameters such as drive frequency and temperature, as well as fringing effects, mirror surface deformations, and cross-talk from neighboring devices. The steps taken to develop this model can be applied to other micromirrors, such as the cantilever and torsion-beam designs, to produce an advanced model for any given device. The micromirror devices studied in this paper were commercially fabricated in a surface micromachining process. A microscope-based laser interferometer is used to test the device in which a beam reflected from the device modulates a fixed reference beam. The mirror displacement is determined from the relative phase which generates a continuous set of data for each selected position on the mirror surface. Plots of this data describe the localized deflection as a function of drive voltage.

Michalicek, M. Adrian; Sene, Darren E.; Bright, Victor M.

1995-01-01

382

Multilayer polymer light emitting devices  

NASA Astrophysics Data System (ADS)

The interplay of device layers and their interfaces is a major area of study in Polymer Light Emitting Devices (PLEDs). Many factors such as the degradation, efficiency, and overall performance depend on how these layers interact with each other. A fundamental understanding of the interfaces of these layers can lend to better performing devices using a multitude of organic polymers deposited in conjunction with each other in several ways. We have studied basic PLED devices in which we vary the emissive layer used, along with final bake temperatures. Devices include a glass substrate with Indium Tin Oxide anode, Aluminum cathode, and Plexcore Hole Injection layer. The active polymer films were spin casted from solution of MEH-PPV and PFO. Single layer and dual layers of several polymers are studied by examining current-voltage characteristics, film densities, impedance measurements, light emission, and efficiency calculations. We have found that not only do dual layers positively alter the performance of the device in the majority of cases, but the solvents in which each layer is originally in when deposited affects the formation of the interface, thereby altering the device mechanisms.

Barcikowski, Zachary; Thomas, Adam; Tzolov, Marian

2013-03-01

383

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

384

Control method for prosthetic devices  

NASA Technical Reports Server (NTRS)

A control system and method for prosthetic devices is provided. The control system comprises a transducer for receiving movement from a body part for generating a sensing signal associated with that movement. The sensing signal is processed by a linearizer for linearizing the sensing signal to be a linear function of the magnitude of the distance moved by the body part. The linearized sensing signal is normalized to be a function of the entire range of body part movement from the no-shrug position of the moveable body part. The normalized signal is divided into a plurality of discrete command signals. The discrete command signals are used by typical converter devices which are in operational association with the prosthetic device. The converter device uses the discrete command signals for driving the moveable portions of the prosthetic device and its sub-prosthesis. The method for controlling a prosthetic device associated with the present invention comprises the steps of receiving the movement from the body part, generating a sensing signal in association with the movement of the body part, linearizing the sensing signal to be a linear function of the magnitude of the distance moved by the body part, normalizing the linear signal to be a function of the entire range of the body part movement, dividing the normalized signal into a plurality of discrete command signals, and implementing the plurality of discrete command signals for driving the respective moveable prosthesis device and its sub-prosthesis.

Bozeman, Richard J., Jr. (inventor.)

1995-01-01

385

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

386

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

387

Electrically Variable Resistive Memory Devices  

NASA Technical Reports Server (NTRS)

Nonvolatile electronic memory devices that store data in the form of electrical- resistance values, and memory circuits based on such devices, have been invented. These devices and circuits exploit an electrically-variable-resistance phenomenon that occurs in thin films of certain oxides that exhibit the colossal magnetoresistive (CMR) effect. It is worth emphasizing that, as stated in the immediately preceding article, these devices function at room temperature and do not depend on externally applied magnetic fields. A device of this type is basically a thin film resistor: it consists of a thin film of a CMR material located between, and in contact with, two electrical conductors. The application of a short-duration, low-voltage current pulse via the terminals changes the electrical resistance of the film. The amount of the change in resistance depends on the size of the pulse. The direction of change (increase or decrease of resistance) depends on the polarity of the pulse. Hence, a datum can be written (or a prior datum overwritten) in the memory device by applying a pulse of size and polarity tailored to set the resistance at a value that represents a specific numerical value. To read the datum, one applies a smaller pulse - one that is large enough to enable accurate measurement of resistance, but small enough so as not to change the resistance. In writing, the resistance can be set to any value within the dynamic range of the CMR film. Typically, the value would be one of several discrete resistance values that represent logic levels or digits. Because the number of levels can exceed 2, a memory device of this type is not limited to binary data. Like other memory devices, devices of this type can be incorporated into a memory integrated circuit by laying them out on a substrate in rows and columns, along with row and column conductors for electrically addressing them individually or collectively.

Liu, Shangqing; Wu, Nai-Juan; Ignatiev, Alex; Charlson, E. J.

2010-01-01

388

Off-device fault tolerance for digital imaging devices  

Microsoft Academic Search

Charged-coupled device (CCD) is one of the widely-used optical sensing device technologies for various digital imaging systems such as digital cameras, digital camcorders, and digital X-ray imaging systems. Pixels on a CCD may suffer from defective or faulty pixels due to numerous causes such as imperfect fabrication, excessive exposure to light radiation and sensing element aging to mention a few.

B. Jin; N.-J. Park; K. M. George; F. Lombardi; Y. B. Kim

2004-01-01

389

Magnetic endotracheal tube imaging device.  

PubMed

This paper describes an accurate, economical, and portable device that helps to locate the position of an endotracheal tube (ETT) in situ. The device uses an array of magnetic field sensors to detect an anomaly in magnetic field caused by magnet embedded near the cuff of an ETT, and displays an intuitive map of relative magnetic field intensity under the sensor area. The device provides real-time feedback of the position to a clinician, so that corrective measures can be taken if the ETT is determined to be outside of normal positioning with respect to the patient's airway. Variations of the proposed design are suitable for continuous monitoring. PMID:19162823

Wichakool, Warit; Pierquet, Brandon; Durand, Keith; Hsu, Byron; Sheridan, Rob; Ma, Hongshen

2008-01-01

390

Streamline-based microfluidic device  

NASA Technical Reports Server (NTRS)

The present invention provides a streamline-based device and a method for using the device for continuous separation of particles including cells in biological fluids. The device includes a main microchannel and an array of side microchannels disposed on a substrate. The main microchannel has a plurality of stagnation points with a predetermined geometric design, for example, each of the stagnation points has a predetermined distance from the upstream edge of each of the side microchannels. The particles are separated and collected in the side microchannels.

Tai, Yu-Chong (Inventor); Zheng, Siyang (Inventor); Kasdan, Harvey (Inventor)

2013-01-01

391

Recent medical devices for tonsillectomy  

PubMed Central

The most frequent and probably the earliest described surgical intervention of ENT field is tonsillectomy. Various methods were described and devices were invented up to now in order to increase safety and decrease time consumption and complications. All new created devices promises lower intraoperative blood loss, intraoperative time, postoperative pain and bleeding. But with their widely use it is seen that they cannot fulfill what they promise. Debate also continues as to which technique yields the best outcome. This study reports a summary for common medical devices which were previously used in tonsillectomy.

Sayin, I; Cingi, C

2012-01-01

392

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

393

Recent medical devices for tonsillectomy.  

PubMed

The most frequent and probably the earliest described surgical intervention of ENT field is tonsillectomy. Various methods were described and devices were invented up to now in order to increase safety and decrease time consumption and complications. All new created devices promises lower intraoperative blood loss, intraoperative time, postoperative pain and bleeding. But with their widely use it is seen that they cannot fulfill what they promise. Debate also continues as to which technique yields the best outcome. This study reports a summary for common medical devices which were previously used in tonsillectomy. PMID:23930051

Sayin, I; Cingi, C

2012-01-01

394

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

395

Thermoelectric Devices Advance Thermal Management  

NASA Technical Reports Server (NTRS)

Thermoelectric (TE) devices heat, cool, and generate electricity when a temperature differential is provided between the two module faces. In cooperation with NASA, Chico, California-based United States Thermoelectric Consortium Inc. (USTC) built a gas emissions analyzer (GEA) for combustion research. The GEA precipitated hydrocarbon particles, preventing contamination that would hinder precise rocket fuel analysis. The USTC research and design team uses patent-pending dimple, pin-fin, microchannel and microjet structures to develop and design heat dissipation devices on the mini-scale level, which not only guarantee high performance of products, but also scale device size from 1 centimeter to 10 centimeters. USTC continues to integrate the benefits of TE devices in its current line of thermal management solutions and has found the accessibility of NASA technical research to be a valuable, sustainable resource that has continued to positively influence its product design and manufacturing

2007-01-01

396

Personal cooling air filtering device  

DOEpatents

A temperature modification system for modifying the temperature of fluids includes at least one thermally conductive carbon foam element, the carbon foam element having at least one flow channel for the passage of fluids. At least one temperature modification device is provided, the temperature modification device thermally connected to the carbon foam element and adapted to modify the temperature of the carbon foam to modify the temperature of fluids flowing through the flow channels. Thermoelectric and/or thermoionic elements can preferably be used as the temperature modification device. A method for the reversible temperature modification of fluids includes the steps of providing a temperature modification system including at least one thermally conductive carbon foam element having flow channels and at least one temperature modification device, and flowing a fluid through the flow channels.

Klett, James [Knoxville, TN; Conway, Bret [Denver, NC

2002-08-13

397

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

398

Inducer Hydrodynamic Load Measurement Devices.  

National Technical Information Service (NTIS)

Marshall Space Flight Center (MSFC) has demonstrated two measurement devices for sensing and resolving the hydrodynamic loads on fluid machinery. The first - a derivative of the six-component wind tunnel balance - senses the forces and moments on the rota...

S. E. Skelley T. F. Zoladz

2002-01-01

399

Devices for collecting chemical compounds  

DOEpatents

A device for sampling chemical compounds from fixed surfaces and related methods are disclosed. The device may include a vacuum source, a chamber and a sorbent material. The device may utilize vacuum extraction to volatilize the chemical compounds from a fixed surface so that they may be sorbed by the sorbent material. The sorbent material may then be analyzed using conventional thermal desorption/gas chromatography/mass spectrometry (TD/GC/MS) instrumentation to determine presence of the chemical compounds. The methods may include detecting release and presence of one or more chemical compounds and determining the efficacy of decontamination. The device may be useful in collection and analysis of a variety of chemical compounds, such as residual chemical warfare agents, chemical attribution signatures and toxic industrial chemicals.

Scott, Jill R; Groenewold, Gary S

2013-12-24

400

OCDR guided laser ablation device  

DOEpatents

A guided laser ablation device. The device includes a mulitmode laser ablation fiber that is surrounded by one or more single mode optical fibers that are used to image in the vicinity of the laser ablation area to prevent tissue damage. The laser ablation device is combined with an optical coherence domain reflectometry (OCDR) unit and with a control unit which initializes the OCDR unit and a high power laser of the ablation device. Data from the OCDR unit is analyzed by the control unit and used to control the high power laser. The OCDR images up to about 3 mm ahead of the ablation surface to enable a user to see sensitive tissue such as a nerve or artery before damaging it by the laser.

Dasilva, Luiz B. (Danville, CA); Colston, Jr., Bill W. (Livermore, CA); James, Dale L. (Tracy, CA)

2002-01-01

401

Prefilled devices for parenteral applications.  

PubMed

Current parenteral administration of drugs suffers from several drawbacks including the requirement of healthcare personnel to administer the drug, the risk of needle stick injuries that may result in the transmission of blood borne pathogens, and patient discomfort. Prefilled devices have emerged as powerful tools to improve parenteral administration of drugs. There are a number of clinical conditions including treatment of endocrine diseases, neurological disorders, autoimmune diseases and emergency medicine where prefilled devices have made major improvements to patient care. Prefilled devices have become an important set of tools for the medical practitioner due to their ease of use and safety, cost effectiveness and patient convenience. This review provides a comprehensive summary of existing prefilled devices, their current clinical uses and corresponding regulatory processes. PMID:24479422

Gurman, Pablo; Chi, Albert; Hood, Tiffany; Reina, Micaela; Rosen, Yitzhak; D'hers, Sebastian; Elman, Noel

2014-03-01

402

Switching characteristics of MINPN devices  

NASA Astrophysics Data System (ADS)

The I- V characteristics of the MINPN devices have been studied with the focus on the physical processes in the switchings. The study consists of computer simulation and experimental measurements, both of which show that these devices can exhibit one-state as well as two-state switchings. Such switchings are attributed to the regenerative process of the avalanche of the reverse PN junction with one or multiple current gains of the two composite NPN and MINP transistors. The MIS minority injection plays an important role in determining the switching characteristics of the device. Experimentally the breakover voltage and the hold-on voltage of this device are observed to be adjustable by applying base voltages. This can be considered as another evidence for the increased minority injection of the MIS structure.

Chang, David C. Y.; Lee, Chung Len; Lei, Tan Fu

1989-03-01

403

Fabrication of Artificial Heart Devices.  

National Technical Information Service (NTIS)

The principal objective of the work was to develop microfiber surfaces on nonpermeable materials for use in cell culture and intimal lining development for implantable artificial heart devices. Nylon 6,6 fabrics with one micron filament diameter were used...

E. S. Nuwayser W. W. Cooper D. G. Goldstein J. H. Porter M. Tan

1971-01-01

404

High Performance Thermoelectric Nanocomposite Device.  

National Technical Information Service (NTIS)

A thermoelectric device includes a nanocomposite material with nanowires of at least one thermoelectric material having a predetermined figure of merit, the nanowires being formed in a porous substrate having a low thermal conductivity and having an avera...

D. D. Snyder J. Yang

2006-01-01

405

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

406

High-temperature-measuring device  

DOEpatents

A temperature measuring device for very high design temperatures (to 2000/sup 0/C) is described. The device comprises a homogenous base structure preferably in the form of a sphere or cylinder. The base structure contains a large number of individual walled cells. The base structure has a decreasing coefficient of elasticity within the temperature range being monitored. A predetermined quantity of inert gas is confined within each cell. The cells are dimensonally stable at the normal working temperature of the device. Increases in gaseous pressure within the cells will permanently deform the cell walls at temperatures within the high temperature range to be measured. Such deformation can be correlated to temperature by calibrating similarly constructed devices under known time and temperature conditions.

Not Available

1981-01-27

407

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

408

Distance Estimation Using Handheld Devices.  

National Technical Information Service (NTIS)

The different capabilities mobile devices can offer in the field of distance estimation for military applications are explored in this thesis. Of particular interest is the potential for using computer vision techniques to estimate distance in an operatio...

S. B. Tekaya

2013-01-01

409

A Tension Link Control Device.  

National Technical Information Service (NTIS)

The patent application relates to a tension link control device generally comprised of an inner cylinder and an outer cylinder with a uniquely configured fracture link connected therebetween. The link has a specially configured thread and cross sectional ...

T. W. McCullough

1974-01-01

410

Reprocessing of Reusable Medical Devices  

MedlinePLUS

... retention of blood, tissue and other biological debris (soil) in certain types of reusable medical devices. This ... For Government For Press Combination Products Advisory Committees Science & Research Regulatory Information Safety Emergency Preparedness International Programs ...

411

Insertion Devices, Future Developments, Limitations.  

National Technical Information Service (NTIS)

The first generation of insertion devices having reached maturity (or almost), it is appropriate to survey directions along which new developments are expected. These include: Beam cooling with undulators, elementary particle physics with wigglers and und...

P. L. Csonka

1985-01-01

412

High voltage lightning grounding device  

NASA Technical Reports Server (NTRS)

Grounding device insertion in wire termination cabinets and terminal block modification prevent lightning-induced high voltage transients from reaching inputs or outputs of solid state instruments and control systems. Installation minimizes wiring confusion and achieves 100 percent protection.

Hoffman, R. G.; Peterson, V. S.

1971-01-01

413

Nanogap device: Fabrication and applications  

NASA Astrophysics Data System (ADS)

A nanogap device as a platform for nanoscale electronic devices is presented. Integrated nanostructures on the platform have been used to functionalize the nanogap for biosensor and molecular electronics. Nanogap devices have great potential as a tool for investigating physical phenomena at the nanoscale in nanotechnology. In this dissertation, a laterally self-aligned nanogap device is presented and its feasibility is demonstrated with a nano ZnO dot light emitting diode (LED) and the growth of a metallic sharp tip forming a subnanometer gap suitable for single molecule attachment. For realizing a nanoscale device, a resolution of patterning is critical, and many studies have been performed to overcome this limitation. The creation of a sub nanoscale device is still a challenge. To surmount the challenge, novel processes including double layer etch mask and crystallographic axis alignment have been developed. The processes provide an effective way for making a suspended nanogap device consisting of two self-aligned sharp tips with conventional lithography and 3-D micromachining using anisotropic wet chemical Si etching. As conventional lithography is employed, the nanogap device is fabricated in a wafer scale and the processes assure the productivity and the repeatability. The anisotropic Si etching determines a final size of the nanogap, which is independent of the critical dimension of the lithography used. A nanoscale light emitting device is investigated. A nano ZnO dot is directly integrated on a silicon nanogap device by Zn thermal oxidation followed by Ni and Zn blanket evaporation instead of complex and time consuming processes for integrating nanostructure. The electrical properties of the fabricated LED device are analyzed for its current-voltage characteristic and metal-semiconductor-metal model. Furthermore, the electroluminescence spectrum of the emitted light is measured with a monochromator implemented with a CCD camera to understand the optical properties. The atomically sharp metallic tips are grown by metal ion migration induced by high electric field across a nanogap. To investigate the growth mechanism, in-situ TEM is conducted and the growing is monitored. The grown dendrite nanostructures show less than 1nm curvature of radius. These nanostructures may be compatible for studying the electrical properties of single molecule.

Han, Jun Hyun

414

Piezo-phototronic effect devices  

DOEpatents

A semiconducting device includes a piezoelectric structure that has a first end and an opposite second end. A first conductor is in electrical communication with the first end and a second conductor is in electrical communication with the second end so as to form an interface therebetween. A force applying structure is configured to maintain an amount of strain in the piezoelectric member sufficient to generate a desired electrical characteristic in the semiconducting device.

Wang, Zhong L.; Yang, Qing

2013-09-10

415

Semiconductor photonic crystals and devices  

Microsoft Academic Search

Recent progresses in photonic crystals including both three-dimensional (3D) and two-dimensional (2D) crystals are reviewed. On 3D photonic crystals, we at first explain our approach to create full 3D bandgap crystals at near-infrared wavelengths, and then the introduction of the light-emitters into 3D crystals. On 2D crystals, two types of devices are explained. One is channel-add-drop-filtering devices, which utilize line-

Susumu Noda; Takashi Asano; Masahiro Imada

2002-01-01

416

Micromachined devices for wireless communications  

Microsoft Academic Search

An overview of recent progress in the research and development of micromachined devices for use in wireless communication subsystems is presented. Among the specific devices described are tunable micromachined capacitors, integrated high-Q inductors, micromachined low-loss microwave and millimeter-wave filters, low-loss micromechanical switches, microscale vibrating mechanical resonators with Q's in the tens of thousands, and miniature antennas for millimeter-wave applications. Specific

Clark T.-C. Nguyen; Linda P. B. Katehi; Gabriel M. Rebeiz

1998-01-01

417

Indirect blood pressure measuring device  

NASA Technical Reports Server (NTRS)

Design and performance of a blood pressure recording device for pediatric use are reported. A strain gage transducer with a copper-beryllium strip as force sensing element is used to monitor skin movements and to convert them into electrical signals proportional to those displacements. Experimental tests with this device in recording of force developed above the left femoral artery of a dog accurately produced a blood pressure curve.

Hum, L.; Cole, C. E.

1973-01-01

418

Inertial impaction air sampling device  

Microsoft Academic Search

An inertial impactor is designed which is to be used in an air sampling device for collection of respirable size particles in ambient air. The device may include a graphite furnace as the impaction substrate in a small-size, portable, direct analysis structure that gives immediate results and is totally self-contained allowing for remote and\\/or personal sampling. The graphite furnace collects

Dewhurst

1990-01-01

419

Dynamic macromodels for sensor devices  

Microsoft Academic Search

The focus of this paper is the generation of macromodels that capture all relevant information of sensor devices. The approach starts with a finite element model, which considers electromechanical coupling and fluid-structure interaction at the continuous-field level. ANSYS\\/Multiphysics reduced order model (ROM) procedures are used to reduce the large amount of degrees of freedom of the device model. The procedure

Torsten Hauck; Manfred Thanner; G. O'Brien

2005-01-01

420

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

421

Emerging Cardiac Devices and Technologies  

Microsoft Academic Search

In previous chapters, authors provided brief histories of cardiac device development and several fairly thorough discussions\\u000a of currently employed devices or assessment technologies. To gain insight into how rapidly innovations in the area of cardiac\\u000a disease are progressing, a search of the US Patent and Trademark Office Website (www.uspto.gov) can simply be searched. Such\\u000a a search produces an impressive number

Paul A. Iaizzo

422

75 FR 72832 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Docket No. FDA-2010-N-0585] Neurological Devices Panel of the Medical Devices...the public. Name of Committee: Neurological Devices Panel of the Medical Devices Advisory Committee. General Function of the Committee: To provide...

2010-11-26

423

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

Federal Register 2010, 2011, 2012, 2013

...Docket No. FDA-2010-N-0001] Neurological Devices Panel of the Medical Devices...the public. Name of Committee: Neurological Devices Panel of the Medical Devices Advisory Committee. General Function of the Committee: To provide...

2010-09-14

424

76 FR 71045 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Docket No. FDA-2011-N-0002] Neurological Devices Panel of the Medical Devices...the public. Name of Committee: Neurological Devices Panel of the Medical Devices Advisory Committee. General Function of the Committee: To provide...

2011-11-16

425

77 FR 73034 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Docket No. FDA-2012-N-0001] Neurological Devices Panel of the Medical Devices...the public. Name of Committee: Neurological Devices Panel of the Medical Devices Advisory Committee. General Function of the Committee: To provide...

2012-12-07

426

77 FR 18829 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Administration [Docket No. FDA-2011-N-0001] Circulatory System Devices Panel of the Medical Devices Advisory Committee...will be open to the public. Name of Committee: Circulatory System Devices Panel of the Medical Devices Advisory...

2012-03-28

427

76 FR 58019 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Administration [Docket No. FDA-2011-N-0002] Circulatory System Devices Panel of the Medical Devices Advisory Committee...will be open to the public. Name of Committee: Circulatory System Devices Panel of the Medical Devices Advisory...

2011-09-19

428

76 FR 56200 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Administration [Docket No. FDA-2011-N-0002] Circulatory System Devices Panel of the Medical Devices Advisory Committee...will be open to the public. Name of Committee: Circulatory System Devices Panel of the Medical Devices Advisory...

2011-09-12

429

78 FR 11208 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Administration [Docket No. FDA-2013-N-0001] Circulatory System Devices Panel of the Medical Devices Advisory Committee...will be open to the public. Name of Committee: Circulatory System Devices Panel of the Medical Devices Advisory...

2013-02-15

430

78 FR 24775 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...  

Federal Register 2010, 2011, 2012, 2013

...337-TA-745] Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and Components Thereof...importation of certain wireless communication devices, portable music and data processing devices, computers and components...

2013-04-26

431

78 FR 12785 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...  

Federal Register 2010, 2011, 2012, 2013

...337-TA-745] Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and Components Thereof...importation of certain wireless communication devices, portable music and data processing devices, computers and components...

2013-02-25

432

77 FR 52759 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...  

Federal Register 2010, 2011, 2012, 2013

...337-TA-745] Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and Components Thereof...importation of certain wireless communication devices, portable music and data processing devices, computers and components...

2012-08-30

433

77 FR 38826 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...  

Federal Register 2010, 2011, 2012, 2013

...337-TA-745] Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and Components Thereof...importation of certain wireless communication devices, portable music and data processing devices, computers and components...

2012-06-29

434

76 FR 14414 - Microbiology Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...AND HUMAN SERVICES [Docket No. FDA-2011-N-0002] Microbiology Devices Panel of the Medical Devices Advisory Committee...meeting will be open to the public. Name of Committee: Microbiology Devices Panel of the Medical Devices Advisory...

2011-03-16

435

78 FR 26786 - Microbiology Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2013-N-0001] Microbiology Devices Panel of the Medical Devices Advisory Committee...meeting will be open to the public. Name of Committee: Microbiology Devices Panel of the Medical Devices Advisory...

2013-05-08

436

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

437

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

438

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

439

78 FR 25747 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...  

Federal Register 2010, 2011, 2012, 2013

...Drug Administration [Docket No. FDA-2013-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...

2013-05-02

440

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

441

76 FR 48871 - Immunology Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

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

2011-08-09

442

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

443

21 CFR 801.109 - Prescription devices.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Prescription devices. 801.109 Section 801...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Exemptions From...Caution: Federal law restricts this device to sale by or on the order of a ____â,...

2013-04-01

444

78 FR 15877 - Taxable Medical Devices; Correction  

Federal Register 2010, 2011, 2012, 2013

...tax imposed on the sale of certain medical devices, enacted by the Health...of taxable medical device to the FDA's...read ``of a taxable medical device to the FDA's...heading ``Installment Sales, Leases, and...

2013-03-13

445

Adverse Event Reporting For Medical Devices.  

National Technical Information Service (NTIS)

Adverse event reporting enables FDA to take corrective action on problem devices and to prevent injury and death by alerting the public when potentially hazardous devices are discovered. Within FDA, the Center for Devices and Radiological Health (CDRH) is...

2009-01-01

446

47 CFR 15.103 - Exempted devices.  

Code of Federal Regulations, 2010 CFR

... (d) A digital device utilized exclusively... (e) Specialized medical digital devices (generally used at...used in a patient's home or a health care facility. Non-specialized medical devices, i.e.,...

2010-10-01

447

47 CFR 15.103 - Exempted devices.  

Code of Federal Regulations, 2010 CFR

... (d) A digital device utilized exclusively... (e) Specialized medical digital devices (generally used at...used in a patient's home or a health care facility. Non-specialized medical devices, i.e.,...

2009-10-01

448

SLAC All Access: Vacuum Microwave Device Department  

ScienceCinema

The Vacuum Microwave Device Department (VMDD) builds the devices that make SLAC's particle accelerators go. These devices, called klystrons, generate intense waves of microwave energy that rocket subatomic particles up to nearly the speed of light.

Hasse, Andy

2014-06-13

449

Effects of Radiation on Commercial Power Devices  

NASA Technical Reports Server (NTRS)

The effects of radiation on various commercial power devices are presented. The devices have proved to be very fragile to single event effects, with some of the devices actually succumbing to catastrophic SEE with protons.

Selva, Luis; Becker, Heidi; Chavez, Rosa; Scheick, Leif

2006-01-01

450

Wireless device monitoring methods, wireless device monitoring systems, and articles of manufacture  

DOEpatents

Wireless device monitoring methods, wireless device monitoring systems, and articles of manufacture are described. According to one embodiment, a wireless device monitoring method includes accessing device configuration information of a wireless device present at a secure area, wherein the device configuration information comprises information regarding a configuration of the wireless device, accessing stored information corresponding to the wireless device, wherein the stored information comprises information regarding the configuration of the wireless device, comparing the device configuration information with the stored information, and indicating the wireless device as one of authorized and unauthorized for presence at the secure area using the comparing.

McCown, Steven H. (Rigby, ID); Derr, Kurt W. (Idaho Falls, ID); Rohde, Kenneth W. (Idaho Falls, ID)

2012-05-08

451

Surface micromachined tunable optoelectronic devices  

NASA Astrophysics Data System (ADS)

In recent years there has been an explosion in data traffic due to the prevailing Internet. A technique called wavelength division multiplexing (WDM) promises to accommodate the increased traffic without replacing the existing fiber networks. Wavelength sensitive devices such as tunable filters, detectors, and lasers are key components in the WDM system. Surface micromachining is one of the most promising technologies to fabricate such devices. A typical surface micromachined wavelength-tunable device was demonstrated by integrating a deformable membrane of dielectric mirror stack to optoelectronic devices. These devices have been applied to different fields such as communications, parameter extraction, etc. As the number of WDM channels increases, these devices have to contend with narrower channel linewidths. This is especially important for the passive devices where the linewidth is determined largely by the cavity finesse. To achieve this, a top mirror with high reflectivity and wide bandwidth is desired. Another important issue is how to lower the tuning voltage of devices. In this work, we focus on building a tunable optoelectronic filter with low actuation voltage, narrow linewidth, and wide tuning range. To design an optimal structure, I establish an opto-mechanical model which can evaluate the micromachined structure easily and accurately. Through this model, we can quantify the optical diffraction loss caused by the curved surface and thus facilitate the design of high finesse tunable filters. A comprehensive mechanical method, called the "area moment method," is used to provide an accurate surface profile of the mirror under actuation. This profile is then input into to a second-order perturbation model to estimate optical loss. The linewidth broadening effect can be directly obtained from the loss. From the above analysis, a less stiff top movable structure is accomplished using Al2O3/GaAs as the distributed Bragg reflector material. A tunable optical filter is grown, processed and measured. Its surface profile matches our mechanical analysis and it demonstrates 64 nm tuning range under a 12-volt swing. The tuning characteristics of this device can also be changed by additional silicon nitride etching. This new design of tunable devices will be attractive for future generation of optical communication systems.

Lin, Chien-Chung

452

Analytical Devices in the Chemical Industry Pavilion.  

National Technical Information Service (NTIS)

The specifications and operation of Soviet gas-analyzing devices are presented. Devices include coulometers, a dielcometer, an oxygen analyzer, gas analyzers, liquid analyzers, gas chromatographs, and spectrophotometers.

A. Amannazarov

1976-01-01

453

Impact of data collected on implanted devices and device recipients  

PubMed Central

After the implantation of the first pacemakers in the Netherlands, controlling the quality of the implantation procedure and the device became an important issue for cardiologists, technicians and manufacturers. Over the years, the cooperation between the different workers in this field led to the development of new devices and novel features in the pacemakers, ensuring improvement in the quality of life of the pacemaker patient. This article gives an impression of how registration in national and local novel systems contributed to this development. (Neth Heart J 2008;16(Suppl1):S9-S11.)

Hooijschuur, C.A.M.; Dijk, W.A.

2008-01-01

454

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

455

Inducer Hydrodynamic Load Measurement Devices  

NASA Technical Reports Server (NTRS)

Marshall Space Flight Center (MSFC) has demonstrated two measurement devices for sensing and resolving the hydrodynamic loads on fluid machinery. The first - a derivative of the six component wind tunnel balance - senses the forces and moments on the rotating device through a weakened shaft section instrumented with a series of strain gauges. This "rotating balance" was designed to directly measure the steady and unsteady hydrodynamic loads on an inducer, thereby defining both the amplitude and frequency content associated with operating in various cavitation modes. The second device - a high frequency response pressure transducer surface mounted on a rotating component - was merely an extension of existing technology for application in water. MSFC has recently completed experimental evaluations of both the rotating balance and surface-mount transducers in a water test loop. The measurement bandwidth of the rotating balance was severely limited by the relative flexibility of the device itself, resulting in an unexpectedly low structural bending mode and invalidating the higher frequency response data. Despite these limitations, measurements confirmed that the integrated loads on the four-bladed inducer respond to both cavitation intensity and cavitation phenomena. Likewise, the surface-mount pressure transducers were subjected to a range of temperatures and flow conditions in a non-rotating environment to record bias shifts and transfer functions between the transducers and a reference device. The pressure transducer static performance was within manufacturer's specifications and dynamic response accurately followed that of the reference.

Skelley, Stephen E.; Zoladz, Thomas F.

2002-01-01

456

Compact, Controlled Resistance Exercise Device  

NASA Technical Reports Server (NTRS)

Spaceflight leads to muscle and bone atrophy. Isoinertial (free-weight) exercises provide a sufficient stimulus to elicit increases in both muscle strength and bone mineral density in Earth-based studies. While exercise equipment is in use on the International Space Station for crewmember health maintenance, current devices are too large to place in a transport vehicle or small spacecraft. Therefore, a portable computer controlled resistance exercise device is being developed that is able to simulate the inertial loading experienced when lifting a mass on Earth. This portable device weighs less than 50 lb and can simulate the resistance of lifting and lowering up to 600 lb of free-weights. The objective is to allow crewmembers to perform resistance exercise with loads capable of maintaining muscle and bone health. The device is reconfigurable and allows for the performance of typical Earth-based free-weight exercises. Forces exerted, volume of work, range of motion, time-under-tension, and speed/ acceleration of movement are recorded and can be remotely monitored to track progress and modify individual protocols based on exercise session data. A performance evaluation will be completed and data will be presented that include ground-reaction force comparisons between the device and free-weight dead-lifts over a spectrum of resistance levels. Movement biomechanics will also be presented.

Paulus, David C.; DeWitt, John K.; Reich, Alton J.; Shaw, James E.; Deaconu, Stelu S.

2011-01-01

457

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

458

Dual control active superconductive devices  

DOEpatents

A superconducting active device has dual control inputs and is constructed such that the output of the device is effectively a linear mix of the two input signals. The device is formed of a film of superconducting material on a substrate and has two main conduction channels, each of which includes a weak link region. A first control line extends adjacent to the weak link region in the first channel and a second control line extends adjacent to the weak link region in the second channel. The current flowing from the first channel flows through an internal control line which is also adjacent to the weak link region of the second channel. The weak link regions comprise small links of superconductor, separated by voids, through which the current flows in each channel. Current passed through the control lines causes magnetic flux vortices which propagate across the weak link regions and control the resistance of these regions. The output of the device taken across the input to the main channels and the output of the second main channel and the internal control line will constitute essentially a linear mix of the two input signals imposed on the two control lines. The device is especially suited to microwave applications since it has very low input capacitance, and is well suited to being formed of high temperature superconducting materials since all of the structures may be formed coplanar with one another on a substrate.

Martens, Jon S. (Albuquerque, NM); Beyer, James B. (Madison, WI); Nordman, James E. (Madison, WI); Hohenwarter, Gert K. G. (Madison, WI)

1993-07-20

459

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

460

Aerosol can waste disposal device  

DOEpatents

Disclosed is a device for removing gases and liquid from containers. The device 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. 7 figures.

O'Brien, M.D.; Klapperick, R.L.; Bell, C.

1993-12-21

461

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

462

Planar doped barrier semiconductor device  

NASA Astrophysics Data System (ADS)

Disclosed is a majority carrier rectifying barrier semi-conductor device housing a planar doped barrier. The device is fabricated in GaAs by an epitaxial growth process which results in an n+-i-p+-i-n+ semiconductor structure wherein an extremely narrow p+ planar doped region is positioned in adjoining regions of nominally undoped (intrinsic) semiconductive material. The narrow widths of the undoped regions and the high densities of the ionized impurities within the space charge region results in rectangular and triangular electric fields and potential barriers, respectively. Independent and continuous control of the barrier height and the asymmetry of the current vs. voltage characteristic is provided through variation of the acceptor charge density and the undoped region widths. Additionally, the capacitance of the device is substantially constant with respect to bias voltage.

Malik, R. J.

1983-10-01

463

Functional material and functional device  

US Patent & Trademark Office Database

Disclosed are a functional material and a functional device, each of which is capable of changing a wavelength of a transmission electromagnetic wave such as transmission light or a transmission sound wave such as a transmission ultrasonic wave through the device on the basis of a signal supplied from external. Each of the functional material and the functional device includes a periodic structure having a periodicity with a unit cycle on the order of a wavelength of an electromagnetic wave or a sound wave, and means for disturbing the periodicity which is inserted in at least one portion of the periodic structure, wherein a wavelength of the electromagnetic wave or sound wave passing through the periodic structure by controlling the means on a signal supplied from external.

2005-09-27

464

Optical to optical interface device  

NASA Technical Reports Server (NTRS)

The development, fabrication, and testing of a preliminary model of an optical-to-optical (noncoherent-to-coherent) interface device for use in coherent optical parallel processing systems are described. The developed device demonstrates a capability for accepting as an input a scene illuminated by a noncoherent radiation source and providing as an output a coherent light beam spatially modulated to represent the original noncoherent scene. The converter device developed under this contract employs a Pockels readout optical modulator (PROM). This is a photosensitive electro-optic element which can sense and electrostatically store optical images. The stored images can be simultaneously or subsequently readout optically by utilizing the electrostatic storage pattern to control an electro-optic light modulating property of the PROM. The readout process is parallel as no scanning mechanism is required. The PROM provides the functions of optical image sensing, modulation, and storage in a single active material.

Oliver, D. S.; Vohl, P.; Nisenson, P.

1972-01-01

465

Metamaterial mirrors in optoelectronic devices.  

PubMed

The phase reversal that occurs when light is reflected from a metallic mirror produces a standing wave with reduced intensity near the reflective surface. This effect is highly undesirable in optoelectronic devices that use metal films as both electrical contacts and optical mirrors, because it dictates a minimum spacing between the metal and the underlying active semiconductor layers, therefore posing a fundamental limit to the overall thickness of the device. Here, we show that this challenge can be circumvented by using a metamaterial mirror whose reflection phase is tunable from that of a perfect electric mirror (? = ?) to that of a perfect magnetic mirror (? = 0). This tunability in reflection phase can also be exploited to optimize the standing wave profile in planar devices to maximize light-matter interaction. Specifically, we show that light absorption and photocurrent generation in a sub-100 nm active semiconductor layer of a model solar cell can be enhanced by ?20% over a broad spectral band. PMID:24952475

Esfandyarpour, Majid; Garnett, Erik C; Cui, Yi; McGehee, Michael D; Brongersma, Mark L

2014-07-01

466

Ventricular assist devices: initial orientation  

PubMed Central

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.

Dave, Hitendu; Lemme, Frithjof; Romanchenko, Olga; Hofmann, Michael; Hubler, Michael

2013-01-01

467

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

468

Modeling floating body memory devices  

NASA Astrophysics Data System (ADS)

TCAD simulations have been performed using SILVACO ATLAS 2D device simulator for a Zero-Capacitor Random Access Memory (ZRAM), a new generation memory cell which is being researched as an alternative for DRAM memory cells in order to get rid of the bulky storage capacitor. In our study we have taken into consideration a Dual Gate-ZRAM (DGZRAM) as it helps reduce drain-induced barrier lowering and hence leakage, while having better control of the charge in the substrate. The states are written into the device using impact ionization to generate a large number of holes in the substrate, which alter the threshold voltage of the device. The effect of the gate oxide thickness and substrate body thickness are being taken into consideration to increase the change in the threshold voltage and thereby the noise margin. A DGZRAM structure with a Quantum well introduced into the substrate via a SiGe layer was also simulated. The quantum well introduces a hole storage pocket in the substrate. Comparisons in terms of noise margin have been made for both the devices, which show that the structure with the quantum well in the substrate performs better than the bulk structure. Simulations have been performed taking into consideration gate electrodes with different work functions and it has been observed that while n-polysilicon has a detrimental impact in conventional MOSFETs due to high off-state leakage current, it can be used to obtain low power memory cells. Parameters such as the quantum well doping density, composition of Ge in the quantum well, channel length of the device, SiGe layer thickness and its position with respect to the top gate have been varied to obtain the optimum noise margin for the device.

Hindupur, Ramya

469

76 FR 8637 - Medical Devices; Medical Device Data Systems  

Federal Register 2010, 2011, 2012, 2013

...basis of irreversible data compression. FDA has...sufficient to ensure that any data compression features will...conditions, including high-priority, real-time...whether displaying the content and timing of an alarm...display medical device data without controlling...

2011-02-15

470

Ligament fixation device and method  

US Patent & Trademark Office Database

The invention relates to a device for attaching a ligament graft to the inside of a bone passage from a proximal location, the device including (1) a non-expansible ring having an interior passage through which the ligament graft may extend, the ring sized to fit within the bone passage; (2) a radially expansible gripping member sized to enter the ring and to press the ligament outwardly against the interior surface of the ring; and (3) an expander coupled to the expansible gripping member, constructed to expand the expansible gripping member to grip the ligament against the ring.

2001-04-24

471

Superconductor and magnet levitation devices  

NASA Astrophysics Data System (ADS)

This article reviews levitation devices using superconductors and magnets. Device concepts and their applications such as noncontact bearings, flywheels, and momentum wheels are discussed, following an exposition of the principles behind these devices. The basic magneto-mechanical phenomenon responsible for levitation in these devices is a result of flux pinning inherent in the interaction between a magnet and a type II superconductor, described and explained in this article by comparison with behavior expected of a perfect conductor or a nearly perfect conductor. The perfect conductor model is used to illustrate why there is a difference between the forces observed when the superconductor is cooled after or before the magnet is brought into position. The same model also establishes the principle that a resisting force or torque arises only in response to those motions of the magnet that changes the magnet field at the superconductor. A corollary of the converse, that no drag torque appears when an axisymmetric magnet levitated above a superconductor rotates, is the guiding concept in the design of superconductor magnet levitation bearings, which is the common component in a majority of levitation devices. The perfect conductor model is extended to a nearly perfect conductor to provide a qualitative understanding of the dissipative aspects such as creep and hysteresis in the interaction between magnets and superconductors. What all these entail in terms of forces, torques, and power loss is expounded further in the context of generic cases of a cylindrical permanent magnet levitated above a superconductor and a superconductor rotating in a transverse magnetic field. Then we proceed to compare the pros and cons of levitation bearings based on the first arrangement with conventional mechanical bearings and active magnetic bearings, and discuss how the weak points of the levitation bearing may be partially overcome. In the latter half, we examine designs of devices using superconductor magnet levitation, focusing more on issues specific to the application. We note that applications of superconductor magnet levitation devices tend to be most attractive in situations where energy conservation is critical. The most advanced in development are flywheel kinetic energy storage systems incorporating superconductor magnet bearings. Variations in the designs to enhance the performance in some specific regards are examined case by case. Next we present a reaction wheel for attitude control on small satellites, similar in overall design to the flywheel kinetic energy storage systems, but with subtle differences in details of emphasis, due to the difference in purpose and environment. Finally, we take a brief look at the case of vibration isolation devices as an example of a rectilinear modification of the more familiar rotational bearing applications.

Ma, K. B.; Postrekhin, Y. V.; Chu, W. K.

2003-12-01

472

Device For Perception Of Polarization  

NASA Technical Reports Server (NTRS)

Polarized image viewed through rotating polarizing filter appears to pulsate. Optical device enables human observer to perceive polarization of light. Used alone for viewing in real time and/or in conjunction with video or movie camera to record for subsequent detailed quantitative analysis of polarization in scene. Device used in remote sensing to classify portions of scenes according to polarization characteristics, to enhance viewing through atmosphere and oceans and to enhance contrasts. Used to monitor oilspill from air and detect changes in soil moisture and to map wetlands, among many other possible civilian and military applications.

Whitehead, Victor S.; Coulson, Kinsel

1993-01-01

473

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

474

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

475

A Trusted Portable Computing Device  

NASA Astrophysics Data System (ADS)

A trusted portable computing device and its security mechanism were presented to solve the security issues, such as the attack of virus and Trojan horse, the lost and stolen of storage device, in mobile office. It used smart card to build a trusted portable security base, virtualization to create a secure virtual execution environment, two-factor authentication mechanism to identify legitimate users, and dynamic encryption to protect data privacy. The security environment described in this paper is characteristic of portability, security and reliability. It can meet the security requirement of mobile office.

Ming-wei, Fang; Jun-jun, Wu; Peng-fei, Yu; Xin-fang, Zhang

476

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

477

Gas sensing with acoustic devices  

SciTech Connect

A survey is made of acoustic devices that are suitable as gas and vapor sensors. This survey focuses on attributes such as operating frequency, mass sensitivity, quality factor (Q), and their ability to be fabricated on a semiconductor substrate to allow integration with electronic circuitry. The treatment of the device surface with chemically-sensitive films to detect species of interest is discussed. Strategies for improving discrimination are described, including sensor arrays and species concentration and separation schemes. The advantages and disadvantages of integrating sensors with microelectronics are considered, along with the effect on sensitivity of scaling acoustic gas sensors to smaller size.

Martin, S.J.; Frye, G.C. [Sandia National Labs., Albuquerque, NM (United States); Spates, J.J. [Ktech Corp., Albuquerque, NM (United States); Butler, M.A. [Sandia National Labs., Albuquerque, NM (United States)

1996-12-31

478

Devices used in cardiac arrest.  

PubMed

Even the best conventional manual cardiopulmonary resuscitation (CPR) is highly inefficient, producing only a fraction of normal cardiac output. Over the past several decades, many therapeutic devices have been designed to improve on conventional CPR during cardiac arrest and increase the probability of survival. This article reviews several adjuncts and mechanical alternatives to conventional CPR for use during cardiac arrest. Recent clinical studies comparing conventional resuscitation techniques with the use of devices during cardiac arrest are reviewed, with a focus on clinical implications and directions for future research. PMID:22107983

Brooks, Steven C; Toma, Alina; Hsu, Jonathan

2012-02-01

479

Beta ray flux measuring device  

DOEpatents

A beta ray flux measuring device in an activated member in-core instrumentation system for pressurized water reactors. The device includes collector rings positioned about an axis in the reactor's pressure boundary. Activated members such as hydroballs are positioned within respective ones of the collector rings. A response characteristic such as the current from or charge on a collector ring indicates the beta ray flux from the corresponding hydroball and is therefore a measure of the relative nuclear power level in the region of the reactor core corresponding to the specific exposed hydroball within the collector ring.

Impink, Jr., Albert J. (Murrysville, PA); Goldstein, Norman P. (Murrysville, PA) [Murrysville, PA

1990-01-01

480

Inertial impaction air sampling device  

DOEpatents

An inertial impactor is designed which is to be used in an air sampling device for collection of respirable size particles in ambient air. The device may include a graphite furnace as the impaction substrate in a small-size, portable, direct analysis structure that gives immediate results and is totally self-contained allowing for remote and/or personal sampling. The graphite furnace collects suspended particles transported through the housing by means of the air flow system, and these particles may be analyzed for elements, quantitatively and qualitatively, by atomic absorption spectrophotometry. 3 figs.

Dewhurst, K.H.

1990-05-22

481

Bolometric Device Based on Fluxoid Quantization  

NASA Technical Reports Server (NTRS)

The temperature dependence of fluxoid quantization in a superconducting loop. The sensitivity of the device is expected to surpass that of other superconducting- based bolometric devices, such as superconducting transition-edge sensors and superconducting nanowire devices. Just as important, the proposed device has advantages in sample fabrication.

Bonetti, Joseph A.; Kenyon, Matthew E.; Leduc, Henry G.; Day, Peter K.

2010-01-01

482

Connector\\/nitinol delta contact force device  

Microsoft Academic Search

An electrical connector employs a pin and socket mechanism enclosed by a contact force device. The contact force device has a uniqueness so that after insertion of the pin in the socket with the device at a very low temperature is completed, the device is allowed to return to ambient temperature. The separation force of the pin and socket mechanism

R. F. Kemka

1984-01-01

483

Input Devices for Young Handicapped Children.  

ERIC Educational Resources Information Center

The versatility of the computer can be expanded considerably for young handicapped children by using input devices other than the typewriter-style keyboard. Input devices appropriate for young children can be classified into four categories: alternative keyboards, contact switches, speech input devices, and cursor control devices. Described are…

Morris, Karen

484

Coping with Defective Software in Medical Devices  

Microsoft Academic Search

Embedding defective software in medical devices increases safety risks. Given that all software is inherently defective, how can medical device manufacturers identify and manage risk? An effective, tailored risk management process can make the task less daunting. Developing complex, software-based medical devices is a challenging business. Device manufacturers must understand the inherent differences between hardware and software components and establish

Steven R. Rakitin

2006-01-01

485

Damping force control device for suspension system  

US Patent & Trademark Office Database

A damping force control device for a suspension system of a vehicle includes a shock absorber having a fluid chamber therein and provided at each wheel side of the vehicle, an orifice device for supplying an amount of fluid into the fluid chamber, and a control device for controlling the opening of the orifice device based on the vertical speed above the shock absorber.

1994-11-01

486

Evaluation of Oral Water Irrigation Devices  

Microsoft Academic Search

Water irrigation devices (WIDs) are widely used in homes and dental offices across the country for oral hygiene. There have been several reported cases of tissue damage with the use of these devices. In the present investigation, two commercially available oral water irrigation devices were evaluated using bioengineering principles. The flow rates delivered by these devices were measured at different

Narender P Reddy; Sunil K Kesavan; Bruce R Costarella

1985-01-01

487

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

488

Tolerating hardware device failures in software  

Microsoft Academic Search

Hardware devices can fail, but many drivers assume they do not. When confronted with real devices that misbehave, these assumptions can lead to driver or system failures. While major operating system and device vendors recommend that drivers detect and recover from hardware failures, we find that there are many drivers that will crash or hang when a device fails. Such

Asim Kadav; Matthew J. Renzelmann; Michael M. Swift

2009-01-01

489

Optoelectronic Device Modeling Using Field Simulation Techniques  

Microsoft Academic Search

Optoelectronic devices are important devices in optical fiber communications, optical signal processing, and optoelectronic equipment. This thesis develops new models for optoelectronic devices using electromagnetic field simulation techniques. To demonstrate this new technique, two kinds of optoelectronic devices are investigated in this thesis. Vertical cavity surface emitting laseer (VCSEL) is taken as the first research example due to the promising

Minya Zhang

1998-01-01

490

Optoelectronic device modeling using field simulation techniques  

Microsoft Academic Search

Optoelectronic devices are important devices in optical fiber communications, optical signal processing, and optoelectronic equipment. This thesis develops new models for optoelectronic devices using electromagnetic field simulation techniques. ^ To demonstrate this new technique, two kinds of optoelectronic devices are investigated in this thesis. Vertical cavity surface emitting laser (VCSEL) is taken as the first research example due to the

Minya Zhang

1998-01-01

491

STRATUS: Assembling Virtual Platforms from Device Clouds  

Microsoft Academic Search

There is an increasing number of network-enabled computing devices in homes and offices, driven by continued improvements in device capabilities and network connectivity. By exploiting the virtualization technologies that have begun to pervade even the mobile domain, these devices' hardware components, such as displays, input devices, disks, or processors, can be decoupled from the physical platforms on which they reside

Minsung Jang; Karsten Schwan

2011-01-01

492

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

493

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

494

Flexible molecular-scale electronic devices  

NASA Astrophysics Data System (ADS)

Flexible materials and devices could be exploited in light-emitting diodes, electronic circuits, memory devices, sensors, displays, solar cells and bioelectronic devices. Nanoscale elements such as thin films, nanowires, nanotubes and nanoparticles can also be incorporated into the active films of mechanically flexible devices. Large-area devices containing extremely thin films of molecular materials represent the ultimate scaling of flexible devices based on organic materials, but the influence of bending and twisting on the electrical and mechanical stability of such devices has never been examined. Here, we report the fabrication and characterization of two-terminal electronic devices based on self-assembled monolayers of alkyl or aromatic thiol molecules on flexible substrates. We find that the charge transport characteristics of the devices remain stable under severe bending conditions (radius <= 1 mm) and a large number of repetitive bending cycles (>=1,000). The devices also remain reliable in various bending configurations, including twisted and helical structures.

Park, Sungjun; Wang, Gunuk; Cho, Byungjin; Kim, Yonghun; Song, Sunghoon; Ji, Yongsung; Yoon, Myung-Han; Lee, Takhee

2012-07-01

495

Semiconductor device simulation: the hydrodynamic model  

Microsoft Academic Search

VLSI (very large scale integrated) chips incorporate hundreds of millions of semiconductor circuits. To predict the performance of VLSI circuits, the current-voltage (I-V) characteristics of the semiconductor devices are required. Semiconductor device simulation codes provide a way of predicting I-V curves as device parameters are varied, without having to fabricate the device first. Thus, many different designs for devices and

C. L. Gardner

2004-01-01

496

The quantum hydrodynamic model for semiconductor devices  

Microsoft Academic Search

Quantum semiconductor devices are playing an increasingly important role in advanced microelectronic applications, including multiple-state logic and memory devices. To model quantum devices, the classical hydrodynamic model for semiconductor devices can be extended to include O(h(2)) quantum corrections. This proposal focused on theoretical and computational investigations of the flow of electrons in semiconductor devices based on the quantum hydrodynamic model.

Carl L. Gardner

1995-01-01

497

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

498

Power Conditioning Devices: Analytical Survey.  

National Technical Information Service (NTIS)

The survey is the first in a series and deals with Soviet research and development efforts in the field of power-conditioning devices for aerospace vehicles. The survey is divided into two parts: Part I presents a survey and discussion of developments in ...

J. Podoski

1966-01-01

499

Superconducting Planar Devices for Cosmology  

Microsoft Academic Search

To enhance systematics cleaness of a new advanced detection architecture for B-modes detection of the Cosmic Microwave Background polarization and in the framework of the ground based instrument QUBIC (Q and U Bolometric Interferometer for Cosmology), we study planar superconducting devices. Waveguide to microstrip transition, orthomode transducer and phase switches are therefore investigated as well as their cryogenic characterization at

A. Ghribi; B. Bélier; F. Boussaha; E. Bréelle; M. Piat; S. Spinelli; A. Tartari; M. Zannoni

2009-01-01

500