Sample records for venetian sun-shading device

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

    NASA Technical Reports Server (NTRS)

    Namkoong, D.

    1972-01-01

    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).

  2. Seamstresses Stitch a Sun-Shade for Skylab

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Two seamstresses stitch together a sun-shade for the Skylab Orbital Workshop, the first United States Experimental space station in orbit, which lost its thermal protection shield during the launch on May 14, 1973. Without the heat shield, the temperature inside the Orbital Workshop became dangerously high, rendering the workshop uninhabitable and threatening the interior insulation and adhesive to deteriorate. Marshall engineers and scientists worked tirelessly around the clock to develop an emergency repair procedure. The Skylab crew and the repair kits were launched just 11 days after the incident. The crew successfully deployed the twin-pole sail parasol sun-shade during their EVA (Extravehicular Activity) the next day.

  3. Sun-shade patterns of leaf carotenoid composition in 86 species of neotropical forest plants

    E-print Network

    Bermingham, Eldredge

    Sun-shade patterns of leaf carotenoid composition in 86 species of neotropical forest plants Shizue to study sun-shade patterns in carotenoid biosynthesis and occurrence of a-carotene (a) and carotenoids, especially lutein and neoxanthin. Under high irradiance, LMA was greater and b-carotene (b

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

    ERIC Educational Resources Information Center

    Mooij, D.

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

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

    PubMed Central

    Miranda-Jácome, Antonio; Montaña, Carlos; Fornoni, Juan

    2013-01-01

    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. PMID:23223204

  6. DETAIL VIEW, WEST VENETIAN WINDOW IN SOUTH WALL. (NOTE THE ...

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

    DETAIL VIEW, WEST VENETIAN WINDOW IN SOUTH WALL. (NOTE THE IRON BARS ON THE CELLAR WINDOW BELOW. THIS WINDOW LETS ONTO WHAT WAS LIKELY THE ESTATE OFFICE DURING THE HAMILTONIAN RESIDENCY - The Woodlands, 4000 Woodlands Avenue, Philadelphia, Philadelphia County, PA

  7. Sun, shade, and secondary metabolites

    Technology Transfer Automated Retrieval System (TEKTRAN)

    My research program focuses on understanding plant primary and secondary metabolites. Grape secondary metabolites, such as phenolics, have long been valuable for the organoleptic properties they impart to fruit and wine, and, more recently, for their possible health benefits. These compounds develop...

  8. A system for optimizing interior daylight distribution using reflective Venetian blinds with independent blind angle control

    E-print Network

    McGuire, Molly E

    2005-01-01

    An operational algorithm for blind angle control is developed to optimize the daylighting performance of a system of reflective Venetian blinds. Numerical modeling and experiment confirm that independent control of alternating ...

  9. A review of "Wotton and His Worlds: Spying, Science and Venetian Intrigues" by Gerald Curzon

    E-print Network

    Dennis Flynn

    2005-01-01

    and intellectual satisfactions will always re- main debatable. Gerald Curzon. Wotton and His Worlds: Spying, Science and Venetian Intrigues. Philadelphia: Xlibris, 2004. 178 pp. $33.00 Paper. Review by DENNIS FLYNN, BENTLEY COLLEGE. The author...

  10. The impact of venetian blind geometry and tilt angle on view, direct light transmission and interior illuminance

    Microsoft Academic Search

    Athanassios Tzempelikos

    2008-01-01

    Venetian blinds are a common type of shading. They can reflect and transmit light efficiently into buildings by adjusting the louver angle and at the same time allow some view to the outdoors. This paper presents a systematic method for calculating projected view (or shaded) fractions for venetian blinds of any shape (flat and curved) as a function of rotation

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

    Microsoft Academic Search

    Valentina Tiberi

    2010-01-01

    In the pedemountain area of the Asiago Plateau (Venetian Prealps - NE Italy) sinkholes and landslides represent in many cases a complex response to karst processes. Field survey showed that both soil and bedrock are involved, mainly represented by colluvial-alluvial sediments and carbonate rocks. Preliminary observations also reveal the key role of piping and cave-collapse phenomena and the importance of

  12. 78 FR 40632 - Safety Zone; Venetian Fireworks; Kalamazoo Lake, Saugatuck, MI

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-08

    ...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...

  13. Measuring water exchange between the Venetian Lagoon and the open sea

    NASA Astrophysics Data System (ADS)

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

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

  14. Macrobenthic Community Changes Related to Eutrophication in Palude della Rosa (Venetian Lagoon, Italy)

    Microsoft Academic Search

    D. Tagliapietra; M. Pavan; C. Wagner

    1998-01-01

    Changes in macrozoobenthic communities were studied in a shallow eutrophic basin known as thePalude della Rosain the Venetian lagoon, Italy. The sampling was conducted on a monthly basis from December 1991 to July 1993 at four representative stations. The observed fluctuations of the benthic community structure closely followed the seasonal cycle of the green macroalgaUlva rigidaC. Ag., and its overgrowth.

  15. OFFICE WORKER PREFERENCES OF EXTERIOR SHADING DEVICES: A PILOT STUDY

    Microsoft Academic Search

    Helena Bülow-Hübe

    Solar shading devices are commonly used in offices to reduce cooling loads and glare from windows, but they also affect daylighting and the view to the outside. In this study, the function and op- eration of an awning and an exterior venetian blind as well as their influence on the view out was assessed by fifty office workers. The preferred

  16. On the borders: surgeons and their activities in the Venetian State (1540-1640).

    PubMed

    Bartolini, Donatella

    2015-01-01

    Through the biographies of a dynasty of practitioners who were active in some of the mountainous villages of the Venetian Terraferma the article brings to light unknown aspects of the professional world of surgeons. Their activities were profoundly influenced by the economic and geographic peculiarities of the territory where they lived and worked. Provincial towns and their territories offered professional opportunities both to licensed and to non-university trained practitioners. However, it was generally in small villages, especially those situated in border areas and part of the main commercial networks, that surgeons preferred to establish their practices, thus supplementing the medical services supplied by the town. Normally their knowledge was largely empirical and was transmitted from father to son. The apprenticeship-based training does not appear alternative to the academic education typical of learned practitioners: much evidence points to the existence of 'scientific autodidacts', self-taught practitioners who possessed and read medical texts or had attended academic courses, even if only in part. Practising surgery in this area was a highly mobile activity, stretching from the village to the neighbouring valleys, and even to areas outside the boundaries of the city and across the border of the Venetian state. Surgeons, furthermore, were able to transfer their skills and knowledge across a range of different occupations such as shoemakers, leather workers and tailors, a fact that confirms their close ties with the local artisan milieu. PMID:25498439

  17. On the Borders: Surgeons and their Activities in the Venetian State (1540–1640)

    PubMed Central

    Bartolini, Donatella

    2015-01-01

    Through the biographies of a dynasty of practitioners who were active in some of the mountainous villages of the Venetian Terraferma the article brings to light unknown aspects of the professional world of surgeons. Their activities were profoundly influenced by the economic and geographic peculiarities of the territory where they lived and worked. Provincial towns and their territories offered professional opportunities both to licensed and to non-university trained practitioners. However, it was generally in small villages, especially those situated in border areas and part of the main commercial networks, that surgeons preferred to establish their practices, thus supplementing the medical services supplied by the town. Normally their knowledge was largely empirical and was transmitted from father to son. The apprenticeship-based training does not appear alternative to the academic education typical of learned practitioners: much evidence points to the existence of ‘scientific autodidacts’, self-taught practitioners who possessed and read medical texts or had attended academic courses, even if only in part. Practising surgery in this area was a highly mobile activity, stretching from the village to the neighbouring valleys, and even to areas outside the boundaries of the city and across the border of the Venetian state. Surgeons, furthermore, were able to transfer their skills and knowledge across a range of different occupations such as shoemakers, leather workers and tailors, a fact that confirms their close ties with the local artisan milieu. PMID:25498439

  18. Compositional distinctions between 16th century ?on-de-Venise? and Venetian glass vessels excavated in Antwerp, Belgium

    Microsoft Academic Search

    I. De Raedt; K. Janssens; J. Veeckmanb

    1999-01-01

    At the beginning of the 16th century, Antwerp was one of the most important ports in Europe. Among the archaeological finds that are dated to this period of great wealth, an important number of fragments from luxurious glass vessels have been found. In view of the high price of finished Venetian glassware, it is unlikely that all the Antwerp glass

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

    NASA Technical Reports Server (NTRS)

    Rogallo, F M; Spano, Bartholomew S

    1942-01-01

    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.

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

    Microsoft Academic Search

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

    1998-01-01

    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

  1. Preliminary wind-tunnel investigation of an NACA 23012 airfoil with various arrangements of venetian-blind flaps

    NASA Technical Reports Server (NTRS)

    Wenzinger, Carl J; Harris, Thomas A

    1940-01-01

    Report presents the results of an investigation made in the NACA 7 by 10-foot wind tunnel of a large-chord NACA 23012 airfoil with several arrangements of venetian-blind flaps to determine the aerodynamic section characteristics as affected by the over-all flap chord, the chords of the slats used to form the flap, the slat spacing, the number of slats and the position of the flap with respect to the wing. Complete section data are given in the form of graphs for all the combinations tested.

  2. GRANTS FOR VENETIAN RESEARCH The Trustees of the Gladys Krieble Delmas Foundation of New York announce that up to 20,000 will be

    E-print Network

    Miranda, Eduardo Reck

    GRANTS FOR VENETIAN RESEARCH The Trustees of the Gladys Krieble Delmas Foundation of New York Krieble Delmas Foundation announces its 2012-2013 programme of grants (predoctoral and postdoctoral) for travel to and residence in Venice and the Veneto. Grants will be awarded for historical research

  3. Photochemistry in Saturn's Ring-Shadowed Atmosphere: Of Venetian Blinds, Atmospheric Molecules and Observations

    NASA Astrophysics Data System (ADS)

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

    2013-12-01

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

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

    NASA Astrophysics Data System (ADS)

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

    2013-10-01

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

  5. A review of "At the Center of the Old World: Trade and Manufacturing in Venice and the Venetian Mainland" By Paola Lanaro, ed. 

    E-print Network

    Litchfield, R. Burr

    2007-01-01

    and Trieste. Ceramics were another important industry discussed by Giovanni Favero. Apparently Venetian pottery of the early Renaissance was of poor quality and the guild was weak; better pottery was imported from Spain (Majolica, ini- tially from the island... to favored entrepreneurs. Aristo- cratic taste wanted Delft blue-and-white pottery, which was imitated and locally produced, and eventually Chinese-style porcelain and even English- style earthenware. Some of the manufacturers of these specialties, often...

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

    1996-01-01

    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

  7. A review of "At the Center of the Old World: Trade and Manufacturing in Venice and the Venetian Mainland" By Paola Lanaro, ed.

    E-print Network

    Litchfield, R. Burr

    2007-01-01

    REVIEWS 219 Paola Lanaro, ed. At the Centre of the Old World: Trade and Manufacturing in Venice and the Venetian Mainland, 1400-1800. Toronto: Victoria University/University of Toronto Center for Reformation and Renaissance Studies, 2006... in the fifteenth through eighteenth centuries, but also on the economic history of early-modern cities more generally. The nine essays (plus an introduction by Paola Lanaro and a conclusion by Maurice Aymard) are all by Italian aca- demic scholars and result from...

  8. Statistical elaborations of PS DInSAR data applied to the analysis of the subsidence affecting the Venetian coast

    NASA Astrophysics Data System (ADS)

    Tessitore, Serena; Fiaschi, Simone; Achilli, Vladimiro; Fabris, Massimo; Floris, Mario

    2015-04-01

    Subsidence is a hazard that may have natural or anthropic origin. It can affect wide areas causing important economic losses. The area of the Venetian coast is affected by subsidence mainly due to the exploitation of its resources (gas and water). In particular, about 40% of the Italian extraction activities are on this area and here the subsidence arise in conjunction with the industrial revolution (1950-1970). An effective monitoring system is necessary for the correct management of the resources exploitation that, very often, is not supervised. To this aim, the innovative DInSAR techniques have been effectively employed as monitoring systems for the risk assessments of various instability phenomena, such as subsidence, landslides, volcanic eruptions, earthquakes, sinkholes. These techniques represent a powerful investigation tool for their high spatial and multi-temporal coverage, fast data acquisition, and overall low costs. Their results are the displacement estimates along the satellite Line of Sight (LOS), the velocity map and the displacements time series for the whole observation period. In the present work, the ERS and ENVISAT DInSAR data, achieved through the Persistent Scatterers (PS) technique, have been used to produce the iso-kinetic maps of deformation for an area of about 4300 Km2. Here, the mean velocities computed along the ERS and ENVISAT observation periods 1992-2000 and 2003-2010 have been interpolated through the Ordinary Kriging (OK) method. Simulated values and estimations of subsidence uncertainties have been analysed to advance the current understanding on the phenomenon that affects the study area. The achieved maps give information about the spatial distribution of the rates of deformation, which could be correlated with the available geological, hydrogeological and geotechnical data, as well as with the recorded damage to the structures and infrastructures. Then, local Authorities can use these maps as useful tools for the monitoring and management of the ground deformation caused by natural and anthropic factors.

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

    PubMed

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

    2013-10-01

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

  10. Middle Eocene Nummulites and their offshore re-deposition: A case study from the Middle Eocene of the Venetian area, northeastern Italy

    NASA Astrophysics Data System (ADS)

    Bassi, Davide; Nebelsick, James H.; Puga-Bernabéu, Ángel; Luciani, Valeria

    2013-11-01

    The Middle Eocene Calcari nummulitici formation from northeastern Italy, Venetian area, represents a shallow-marine carbonate ramp developed on the northern Tethyan margin. In the Monti Berici area, its main components are larger foraminifera and coralline red algal communities that constitute thick carbonate sedimentary successions. Middle ramp and proximal outer ramp environments are recognized using component relationships, biofacies and sedimentary features. The middle-ramp is characterized by larger flattened-lenticular Nummulites on palaeohighs between which rhodoliths formed. Larger Nummulites palaeohighs containing Nummulites millecaput, Nummulites crassus, Nummulites discorbinus and Nummulites cf. gizehensis developed more basin-wards. The following relatively quiet environments of basin-wards of the palaeohighs represent areas of maximum carbonate production. The transition between the distal middle- and the proximal outer-ramp settings is marked in the study area by a large erosional surface which is interpreted to have been formed as a result of an erosive channel body filled in by deposits re-sedimented from shallower depths. These off-shore re-sedimented channelized deposits, ascribed to the Shallow Benthic Zone SBZ 15, lying on hemipelagic marls (planktonic foraminiferal zone E9 (P11)) allow for a biostratigraphic correlation to the Late Lutetian. The studied deposits, represented by packstone to rudstones, were displaced whilst still unlithified. The Lutetian-Bartonian regression along with the local tectonic activity promoted the production of a high amount of biogenic shallow-water carbonates mainly produced in the Mossano middle-ramp settings. These prograded towards the basinal areas with high-sedimentation rate of carbonate deposits characterized by the larger Nummulites rudstones. Such high amounts of sediment led to sediment instability which potentially could be mobilized either by return currents due to occasional major storms or by earthquakes induced by tectonic activity. These will have led to the offshore re-deposition of the Nummulites sediments into deeper water setting via the observed channels. Since potential migration pathways are short, such distal re-sedimented channel-filled material surrounded by hemipelagic marls is optimally placed for the formation of potential subsurface oil reservoirs.

  11. Interactions between irradiance, nitrogen nutrition, and water stress in the sun-shade responses of Solanum dulcamara

    Microsoft Academic Search

    C. B. Osmond

    1983-01-01

    When grown with adequate water and nitrogen (12 mM NO3-) four clones of Solanum dulcamara from sun or shade habitats in Europe showed similar potential for acclimation of photosynthesis to irradiance level during growth. When grown with limiting nitrogen (0.6 mM NO3-) all clones showed a low potential for acclimation of photosynthesis to irradiance during growth. If limiting nitrogen was

  12. Daydreaming Devices

    E-print Network

    Da Ponte, Ana Sofia Lopes

    2008-01-01

    Daydreaming Devices is a project on aspects of daydream and the design of convertible furniture within the context of art. This thesis addresses the concepts and the design of two daydreaming devices developed during my ...

  13. Microfluidic Device

    NASA Technical Reports Server (NTRS)

    Tai, Yu-Chong (Inventor); Zheng, Siyang (Inventor); Lin, Jeffrey Chun-Hui (Inventor); Kasdan, Harvey (Inventor)

    2015-01-01

    Described herein are particular embodiments relating to a microfluidic device that may be utilized for cell sensing, counting, and/or sorting. Particular aspects relate to a microfabricated device that is capable of differentiating single cell types from dense cell populations. One particular embodiment relates a device and methods of using the same for sensing, counting, and/or sorting leukocytes from whole, undiluted blood samples.

  14. Sealing device

    DOEpatents

    Garcia-Crespo, Andres Jose

    2013-12-10

    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.

  15. Electrochromic devices

    DOEpatents

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

    2001-01-01

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

  16. Device Performance

    SciTech Connect

    Not Available

    2006-06-01

    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.

  17. Transverse Devices

    Microsoft Academic Search

    H. Julian Goldsmid

    Attractions of devices based on the transverse thermoelectric effects. Theory of synthetic transverse thermo-elements and\\u000a selection of materials. Advantages of a porous component in satisfying conflicting requirements.

  18. Electrochromic devices

    Microsoft Academic Search

    C. G. Granqvist

    2005-01-01

    This paper reviews a number of recently discussed electrochromic devices, mainly for modulating optical transmittance. Data are given on all-solid-state and polymer-laminated constructions, with and without self-powering by integrated solar cells. Special attention is devoted to a novel flexible polyester-based device incorporating electrochromic tungsten oxide and nickel oxide. In particular the exposition covers some critical manufacturing aspects, including gas treatments

  19. Microchannel devices

    SciTech Connect

    Alman, David E.; Wilson, Rick D.

    2001-09-01

    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.

  20. Listening Devices

    NSDL National Science Digital Library

    William C. Robertson, Ph.D.

    2003-01-01

    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.

  1. Electrochemical device

    DOEpatents

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

    1988-01-12

    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.

  2. Detection device

    DOEpatents

    Smith, J.E.

    1981-02-27

    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.

  3. Medical Device Safety

    MedlinePLUS

    ... Vaccines, Blood & Biologics Animal & Veterinary Cosmetics Tobacco Products Medical Devices Print this page Share this page E- ... this page Home Medical Devices Medical Device Safety Medical Device Safety Search the Medical Device Safety Section ...

  4. Alerts and Notices (Devices)

    MedlinePLUS

    ... Medical Devices Medical Device Safety Safety Communications Safety Communications Search the Safety Communication Section Medical Device Safety ... Recalls: Get e-mail updates Medical Device Safety Communications Medical Device Safety Communication Date Unintentional Injection of ...

  5. Laser device

    DOEpatents

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

    2008-08-19

    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.

  6. Latching device

    NASA Technical Reports Server (NTRS)

    Ulrich, G. W. (inventor)

    1975-01-01

    A latching device is suited for use in establishing a substantially motionless connection between a stationary receiver and a movable latching mechanism. The latching mechanism includes a pivotally supported restraining hook continuously urged into a capturing relationship with the receiver, characterized by a spring-biased pawl having a plurality of aligned teeth. The teeth are seated in the surface of the throat of the hook and positionable into restraining engagement with a rigid restraining shoulder projected from the receiver.

  7. Diversionary device

    DOEpatents

    Grubelich, Mark C. (Albuquerque, NM)

    2001-01-01

    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.

  8. Electrochromic device

    DOEpatents

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

    2011-03-15

    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.

  9. Implantable Medical Devices

    MedlinePLUS

    Implantable Medical Devices Updated:Oct 23,2014 Implantable Medical Devices - 2 types 1. Rhythm control ICD -- Implantable cardioverter-defibrillator ( ... medical treatment. 2. Support of the Circulation Implantable Medical Devices Left Ventricular Assist Device (Also known as ...

  10. Recent Medical Device Recalls

    MedlinePLUS

    ... Vaccines, Blood & Biologics Animal & Veterinary Cosmetics Tobacco Products Medical Devices Print this page Share this page E-mail this page Home Medical Devices Medical Device Safety Medical Device Recalls List ...

  11. Remote Physical Device Fingerprinting

    Microsoft Academic Search

    Tadayoshi Kohno; Andre Broido; Kimberly C. Claffy

    2005-01-01

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

  12. Remote physical device fingerprinting

    Microsoft Academic Search

    Tadayoshi Kohno; Andre Broido; K. C. Claffy

    2005-01-01

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

  13. Laser device

    DOEpatents

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

    2007-07-10

    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.

  14. Laser device

    DOEpatents

    Scott, Jill R.; Tremblay, Paul L.

    2004-11-23

    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.

  15. Medical devices: US medical device regulation.

    PubMed

    Jarow, Jonathan P; Baxley, John H

    2015-03-01

    Medical devices are regulated by the US Food and Drug Administration (FDA) within the Center for Devices and Radiological Health. Center for Devices and Radiological Health is responsible for protecting and promoting the public health by ensuring the safety, effectiveness, and quality of medical devices, ensuring the safety of radiation-emitting products, fostering innovation, and providing the public with accurate, science-based information about the products we oversee, throughout the total product life cycle. The FDA was granted the authority to regulate the manufacturing and marketing of medical devices in 1976. It does not regulate the practice of medicine. Devices are classified based on complexity and level of risk, and "pre-1976" devices were allowed to remain on the market after being classified without FDA review. Post-1976 devices of lower complexity and risk that are substantially equivalent to a marketed "predicate" device may be cleared through the 510(k) premarket notification process. Clinical data are typically not needed for 510(k) clearance. In contrast, higher-risk devices typically require premarket approval. Premarket approval applications must contain data demonstrating reasonable assurance of safety and efficacy, and this information typically includes clinical data. For novel devices that are not high risk, the de novo process allows FDA to simultaneously review and classify new devices. Devices that are not legally marketed are permitted to be used for clinical investigation purposes in the United States under the Investigational Device Exemptions regulation. PMID:25458071

  16. Connector device for building integrated photovoltaic device

    SciTech Connect

    Keenihan, James R.; Langmaid, Joseph A.; Eurich, Gerald K.; Lesniak, Michael J.; Mazor, Michael H.; Cleereman, Robert J.; Gaston, Ryan S.

    2014-06-03

    The present invention is premised upon a connector device and method that can more easily electrically connect a plurality of PV devices or photovoltaic system components and/or locate these devices/components upon a building structure. It also may optionally provide some additional sub-components (e.g. at least one bypass diode and/or an indicator means) and may enhance the serviceability of the device.

  17. Medical Device Safety

    MedlinePLUS

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

  18. Blood Glucose Monitoring Devices

    MedlinePLUS

    ... mail this page Home Medical Devices Products and Medical Procedures In Vitro Diagnostics Blood Glucose Monitoring Devices Blood Glucose Monitoring Devices What does this test do? This is a test system for use at home to measure the amount ...

  19. Electroluminescing porous silicon device

    Microsoft Academic Search

    John Penczek; Rosemary L. Smith

    1995-01-01

    The main goal was to determine the mechanism of operation of an all silicon, electroluminescing device. The device consists of an n+ silicon 'wire' supported on top of a layer of porous silicon. Other aims included the evaluation of the device's light emitting efficiency and it's potential as a silicon-based light source. The device emits light over a broad spectrum,

  20. Bipolar thermoelectric devices

    E-print Network

    Pipe, Kevin P. (Kevin Patrick), 1976-

    2004-01-01

    The work presented here is a theoretical and experimental study of heat production and transport in bipolar electrical devices, with detailed treatment of thermoelectric effects. Both homojunction and heterojunction devices ...

  1. Liquid Crystal Devices.

    ERIC Educational Resources Information Center

    Bradshaw, Madeline J.

    1983-01-01

    The nature of liquid crystals and several important liquid crystal devices are described. Ideas for practical experiments to illustrate the properties of liquid crystals and their operation in devices are also described. (Author/JN)

  2. Multiported storage devices 

    E-print Network

    Grande, Marcus Bryan

    2000-01-01

    examples of different applications that can benefit from a multiported storage device. Possible applications that can benefit from multiported storage devices are many of those mentioned when discussing active disks. Data can be compressed/decompressed...

  3. Input devices for CCDs

    NASA Astrophysics Data System (ADS)

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

    1982-12-01

    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

  4. Sealed container sampling device

    NASA Technical Reports Server (NTRS)

    Hennigan, T. J.

    1969-01-01

    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.

  5. Overview of nanoelectronic devices

    Microsoft Academic Search

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

    1997-01-01

    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

  6. Pulse detecting device

    DOEpatents

    Riggan, W.C.

    1984-01-01

    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.

  7. Pulse flux measuring device

    DOEpatents

    Riggan, William C. (Albuquerque, NM)

    1985-01-01

    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.

  8. Thermoacoustic Refrigeration Device

    Microsoft Academic Search

    E. Qing; Feng Wu; Duanyong Li; Fangzhong Guo

    2009-01-01

    A thermoacoustic refrigeration device (TAR) includes an acoustic wave generation device arranged directed to the channel of a hollow tube, and a regenerator provided at a predetermined position in the channel of the tube. A temperature gradient is obtained across the regenerator by an acoustic wave emitted from the acoustic wave generation device. Therefore, a TAR realizing a gas Stirling

  9. Immunotoxicity of Medical Devices

    Microsoft Academic Search

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

    1997-01-01

    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

  10. Emerging memory devices

    Microsoft Academic Search

    Kosmas Galatsis; Kang Wang; Youssry Botros; Yang Yang; Ya-Hong Xie; J. F. Stoddart; R. B. Kaner; Cengiz Ozhan; Jianlin Liu; Mihri Ozkan; Chongwu Zhou; Ki Wook Kim

    2006-01-01

    Each memory device presented has its unique range of advantages and challenges. DRAM and FLASH have radically different characteristics; hence, they are used for different applications. Accordingly, the search for memory devices beyond CMOS comes with an important caveat: different memory for different applications. FENA's research path will continue to focus on improving our presented memory devices, and integrating with

  11. Automatic domotic device interoperation

    Microsoft Academic Search

    Dario Bonino; Emiliano Castellina; Fulvio Corno

    2009-01-01

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

  12. Organic photosensitive devices

    DOEpatents

    Rand, Barry P; Forrest, Stephen R

    2013-11-26

    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.

  13. Pyrotechnic device technology

    Microsoft Academic Search

    1989-01-01

    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

  14. The device management service

    Microsoft Academic Search

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

    2001-01-01

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

  15. Unitary lens semiconductor device

    DOEpatents

    Lear, K.L.

    1997-05-27

    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.

  16. Unitary lens semiconductor device

    DOEpatents

    Lear, Kevin L. (Albuquerque, NM)

    1997-01-01

    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.

  17. Solid state devices

    NASA Technical Reports Server (NTRS)

    1991-01-01

    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.

  18. Active cleaning technique device

    NASA Technical Reports Server (NTRS)

    Shannon, R. L.; Gillette, R. B.

    1973-01-01

    The objective of this program was to develop a laboratory demonstration model of an active cleaning technique (ACT) device. The principle of this device is based primarily on the technique for removing contaminants from optical surfaces. This active cleaning technique involves exposing contaminated surfaces to a plasma containing atomic oxygen or combinations of other reactive gases. The ACT device laboratory demonstration model incorporates, in addition to plasma cleaning, the means to operate the device as an ion source for sputtering experiments. The overall ACT device includes a plasma generation tube, an ion accelerator, a gas supply system, a RF power supply and a high voltage dc power supply.

  19. Inexpensive cochlear implant device.

    PubMed

    Kanchanarak, C; Siriratwatanakul, N; Boonyanukul, S; Saeng-in, A; Krairojananan, T

    1991-12-01

    We have developed a cochlear implant (CI) device modified from the House/3M cochlear implant device. The cost of raw materials was about $25. We used a new and simple technique for coating the implanted coil. We modified the circuit and removed the amplitude-modulated circuit. With this modification, the device uses less electricity and fewer transistors. There are slightly more than 3,000 patients using CI devices all over the world. Millions of profoundly deaf patients are poor and cannot afford the CI device that is now commercially available. Any university with well-trained otolaryngologists and physicists or electrical engineers can perform this technique. PMID:1746846

  20. Photoresponsive organic electroluminescent devices

    Microsoft Academic Search

    M Chikamatsu; Y Ichino; Y Yoshida; N Takada; M Yoshida; T Kamata; K Yase

    2003-01-01

    We have proposed novel photoresponsive green- and blue-emitting organic electroluminescent (EL) devices combining organic EL diodes with titanyl phthalocyanine as a photoconductive layer. By irradiating red and near-infrared (IR) lights to these devices, green and blue emissions were generated, respectively, well below the turn-on voltage. The results indicate that the devices act as an optical switch and up-converter. The EL

  1. High efficiency photovoltaic device

    DOEpatents

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

    1999-11-02

    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.

  2. Adiabatic light processing devices

    NASA Astrophysics Data System (ADS)

    Love, John D.; Molloy, Andrew; Ankiewicz, Adrian

    2006-01-01

    The majority of optical processing devices that are employed in optical transmission systems are based on optical fibres or planar optical waveguides that rely on basic physical phenomena such as coupling, interference or Bragg grating reflection for their functionality. These devices include, for example, a wide variety of single- and multi-mode couplers and splitters, Mach-Zehnder interferometers, wavelength filters, dispersion compensators, arrayed waveguide gratings (AWGs), resonators, etc. In addition to these devices, there is a further range of devices that rely solely on their geometrical design for their functionality and involve none of the above physical phenomena. Simple examples of these devices include velocity couplers, null couplers, Y-junctions and tapers. Each of these devices relies on the approximately adiabatic propagation of each of its modes along the length of the device. A key feature of such propagation is that each mode essentially conserves both its power and field symmetry. Recent work has demonstrated that it is possible to switch modes passively with wavelength using the approximately adiabatic transformation of one mode into a mode with dissimilar field symmetry. This transformation is achieved through appropriate geometrical design of the device. For example, it is possible to transform the symmetric fundamental mode into the first odd mode of a planar waveguide by employing a two-mode asymmetric Y-junction. Using this and other mode transformations, it is possible to design compact planar devices that will combine or separate 2 or 3 channels in a coarse wavelength division multiplexing (CWDM) system.

  3. Preloaded latching device

    NASA Technical Reports Server (NTRS)

    Wesselski, Clarence J. (inventor); Nagy, Kornel (inventor)

    1992-01-01

    A latching device is disclosed which is lever operated sequentially to actuate a set of collet fingers to provide a radial expansion and to actuate a force mechanism to provide a compressive gripping force for attaching first and second devices to one another. The latching device includes a body member having elongated collet fingers which, in a deactuated condition, is insertable through bores on the first and second devices so that gripping terminal portions on the collet fingers are proximate to the end of the bore of the first device while a spring assembly on the body member is located proximate to the outer surface of a second device. A lever is rotatable through 90 deg to move a latching rod to sequentially actuate and expand collet fingers and to actuate the spring assembly by compressing it. During the first 30 deg of movement of the lever, the collet fingers are actuated by the latching rod to provide a radial expansion and during the last 60 deg of movement of the lever, the spring assembly acts as a force mechanism and is actuated to develop a compressive latching force on the devices. The latching rod and lever are connected by a camming mechanism. The amount of spring force in the spring assembly can be adjusted; the body member can be permanently attached by a telescoping assembly to one of the devices; and the structure can be used as a pulling device for removing annular bearings or the like from blind bores.

  4. 21 CFR 890.5525 - Iontophoresis device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5525 Iontophoresis device. (a) Iontophoresis device...

  5. 21 CFR 890.5525 - Iontophoresis device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5525 Iontophoresis device. (a) Iontophoresis device...

  6. 21 CFR 890.5525 - Iontophoresis device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5525 Iontophoresis device. (a) Iontophoresis device...

  7. Microwave device investigations

    NASA Technical Reports Server (NTRS)

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

    1972-01-01

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

  8. Device for removing blackheads

    Microsoft Academic Search

    Berkovich

    1995-01-01

    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.

  9. Electrical apparatus lockout device

    Microsoft Academic Search

    Gonzales

    1999-01-01

    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

  10. Assistive Listening Devices

    ERIC Educational Resources Information Center

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

    1997-01-01

    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…

  11. Solar cell device physics

    Microsoft Academic Search

    S. Fonash

    1981-01-01

    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

  12. 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...

  13. Adiabatic light processing devices

    Microsoft Academic Search

    John D. Love; Andrew Molloy; Adrian Ankiewicz

    2006-01-01

    The majority of optical processing devices that are employed in optical transmission systems are based on optical fibres or planar optical waveguides that rely on basic physical phenomena such as coupling, interference or Bragg grating reflection for their functionality. These devices include, for example, a wide variety of single- and multi-mode couplers and splitters, Mach-Zehnder interferometers, wavelength filters, dispersion compensators,

  14. Local laboratory ventilation devices

    Microsoft Academic Search

    Koenigsberg

    1995-01-01

    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

  15. Advanced resistive exercise device

    NASA Technical Reports Server (NTRS)

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

    2008-01-01

    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.

  16. Microfabricated particle focusing device

    DOEpatents

    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

    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.

  17. Medical Device Reliability BIOMATERIALS

    E-print Network

    (hypothermic to febritic) - mechanical (breathing, bending) - chemical (corrosive fluids) - electrical (current, and neural stimulators, have unacceptably high failure rates. For current devices, we are establishing new-generation devices, we are developing test structures to evaluate alternative packaging materials, which have

  18. Devices and Educational Change

    ERIC Educational Resources Information Center

    Nespor, Jan

    2011-01-01

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

  19. Unconventional Quantum Computing Devices

    E-print Network

    Seth Lloyd

    2000-03-31

    This paper investigates a variety of unconventional quantum computation devices, including fermionic quantum computers and computers that exploit nonlinear quantum mechanics. It is shown that unconventional quantum computing devices can in principle compute some quantities more rapidly than `conventional' quantum computers.

  20. Planar electrochemical device assembly

    DOEpatents

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

    2010-11-09

    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.

  1. Heat tube device

    NASA Technical Reports Server (NTRS)

    Khattar, Mukesh K. (inventor)

    1990-01-01

    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.

  2. Mobile Device Guide Apple iPhone Devices

    E-print Network

    de Lijser, Peter

    Mobile Device Guide ­ Apple iPhone Devices CSUF Date Last Revised: 1/20/11 Page 1 of 3 Connecting to the Campus via iPhone Exchange Client Applies to ­ Apple iPhone based devices only If you are alreadyPhone desktop. 1a. Expand `Mail, Contacts, Calendars' as shown. #12;Mobile Device Guide ­ Apple iPhone Devices

  3. Contamination sampling device

    NASA Technical Reports Server (NTRS)

    Delgado, Felix A. (Inventor); Stern, Susan M. (Inventor)

    1998-01-01

    A contamination sample collection device has a wooden dowel with a cotton swab at one end, the cotton being covered by a nylon cloth and the wooden dowel being encapsulated by plastic tubing which is heat shrunk onto the dowel and onto a portion of the cotton swab to secure the cotton in place. Another plastic tube is heat shrunk onto the plastic that encapsulates the dowel and a portion of the nylon cloth to secure the nylon cloth in place. The device may thereafter be covered with aluminum foil protector. The device may be used for obtaining samples of contamination in clean room environments.

  4. Unipolar arc simulation device

    SciTech Connect

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

    1999-04-20

    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.

  5. Wireless quantified reflex device

    NASA Astrophysics Data System (ADS)

    Lemoyne, Robert Charles

    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.

  6. Wireless device monitoring systems and monitoring devices, and associated methods

    DOEpatents

    McCown, Steven H; Derr, Kurt W; Rohde, Kenneth W

    2014-05-27

    Wireless device monitoring systems and monitoring devices include a communications module for receiving wireless communications of a wireless device. Processing circuitry is coupled with the communications module and configured to process the wireless communications to determine whether the wireless device is authorized or unauthorized to be present at the monitored area based on identification information of the wireless device. Methods of monitoring for the presence and identity of wireless devices are also provided.

  7. Multimaterial multifunctional fiber devices

    E-print Network

    Sorin, Fabien

    Recent discoveries have enabled the integration of metals, insulators and semiconductors structures into extended length of polymer fibers. The challenges and opportunities associated with this new class of fiber devices ...

  8. Radiological Dispersion Device (RDD)

    MedlinePLUS

    ... an RDD is to cause psychological fear and economic disruption. Some devices could cause fatalities from exposure ... shower thoroughly with soap and water. Seek medical attention after officials indicate it is safe to leave ...

  9. Thermoelectric materials and devices

    NASA Technical Reports Server (NTRS)

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

    2011-01-01

    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.

  10. Development of electrochromic devices.

    PubMed

    Pawlicka, A

    2009-01-01

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

  11. Nanocrystal nonvolatile memory devices

    Microsoft Academic Search

    Jan De Blauwe

    2002-01-01

    In this paper we present an overview of nanocrystal memories - a nascent nonvolatile memory technology that promises to extend the scaling of more conventional charge storage devices to nanometer-scale dimensions

  12. 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....

  13. Multimaterial multifunctional fiber devices

    E-print Network

    Sorin, Fabien

    2008-01-01

    Optical fibers and semiconductor devices differ significantly in their properties and their processing approaches. The latter require an assembly of metal, insulator and semiconductor materials into complex geometries with ...

  14. Device control at CEBAF

    SciTech Connect

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

    1996-08-01

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

  15. Advanced underwater lift device

    NASA Technical Reports Server (NTRS)

    Flanagan, David T.; Hopkins, Robert C.

    1993-01-01

    Flexible underwater lift devices ('lift bags') are used in underwater operations to provide buoyancy to submerged objects. Commercially available designs are heavy, bulky, and awkward to handle, and thus are limited in size and useful lifting capacity. An underwater lift device having less than 20 percent of the bulk and less than 10 percent of the weight of commercially available models was developed. The design features a dual membrane envelope, a nearly homogeneous envelope membrane stress distribution, and a minimum surface-to-volume ratio. A proof-of-concept model of 50 kg capacity was built and tested. Originally designed to provide buoyancy to mock-ups submerged in NASA's weightlessness simulators, the device may have application to water-landed spacecraft which must deploy flotation upon impact, and where launch weight and volume penalties are significant. The device may also be useful for the automated recovery of ocean floor probes or in marine salvage applications.

  16. Fabrication of Molecular Devices 

    E-print Network

    Walton, Katherine

    2011-08-04

    was investigated using atomic force microscopy. Lastly, as the final goal of the project was to create single electron tunneling devices by attaching metal nanoparticles to these surfaces, Au nanoparticles of varying sizes ranging from ca 2 – 12 nm were...

  17. Ferroelectric Light Control Device

    NASA Technical Reports Server (NTRS)

    Park, Yeonjoon (Inventor); Choi, Sang H. (Inventor); King, Glen C. (Inventor); Kim, Jae-Woo (Inventor); Elliott, Jr., James R. (Inventor)

    2008-01-01

    A light control device is formed by ferroelectric material and N electrodes positioned adjacent thereto to define an N-sided regular polygonal region or circular region there between where N is a multiple of four.

  18. Optical devices: A compilation

    NASA Technical Reports Server (NTRS)

    1976-01-01

    Technological developments in the field of optics devices which have potential utility outside the aerospace community are described. Optical instrumentation, light generation and transmission, and laser techniques are among the topics covered. Patent information is given.

  19. Improvised Nuclear Device

    MedlinePLUS

    ... Improvised Nuclear Device (IND) is a type of nuclear weapon. When an IND explodes, it gives off four types of energy: a blast wave, intense light, heat, and radiation. The bomb dropped on Hiroshima, Japan, at the ...

  20. Devices for hearing loss

    MedlinePLUS

    ... can help you listen and talk on the telephone. Devices called amplifiers make sound louder. Some phones ... severe hearing loss to place calls to standard telephones. Text telephones, called TTYs or TTDs, allow the ...

  1. Nanowire Thermoelectric Devices

    NASA Technical Reports Server (NTRS)

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

    2005-01-01

    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.

  2. Exhaust gas purification device

    SciTech Connect

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

    1980-02-19

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

  3. device master record (DMR)

    Microsoft Academic Search

    Gerhard Nahler

    \\u000a FDA: “compilation of records containing the design, formulation, specifications, complete manufacturing procedures, quality\\u000a assurance requirements and labeling of a finished device”; overall documentation required to manufacture devices (e.g. general\\u000a documents such as standard operating procedures, but also documents for procurement, processing, labeling, packaging, tests or inspections); an individual must be designated to prepare, date, sign, and approve the DMRs and

  4. Commercialization of microfluidic devices.

    PubMed

    Volpatti, Lisa R; Yetisen, Ali K

    2014-07-01

    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

  5. Atherectomy devices: technology update

    PubMed Central

    Akkus, Nuri I; Abdulbaki, Abdulrahman; Jimenez, Enrique; Tandon, Neeraj

    2015-01-01

    Atherectomy is a procedure which is performed to remove atherosclerotic plaque from diseased arteries. Atherosclerotic plaques are localized in either coronary or peripheral arterial vasculature and may have different characteristics depending on the texture of the plaque. Atherectomy has been used effectively in treatment of both coronary and peripheral arterial disease. Atherectomy devices are designed differently to either cut, shave, sand, or vaporize these plaques and have different indications. In this article, current atherectomy devices are reviewed. PMID:25565904

  6. Atherectomy devices: technology update.

    PubMed

    Akkus, Nuri I; Abdulbaki, Abdulrahman; Jimenez, Enrique; Tandon, Neeraj

    2015-01-01

    Atherectomy is a procedure which is performed to remove atherosclerotic plaque from diseased arteries. Atherosclerotic plaques are localized in either coronary or peripheral arterial vasculature and may have different characteristics depending on the texture of the plaque. Atherectomy has been used effectively in treatment of both coronary and peripheral arterial disease. Atherectomy devices are designed differently to either cut, shave, sand, or vaporize these plaques and have different indications. In this article, current atherectomy devices are reviewed. PMID:25565904

  7. Microelectronic Devices and Circuits

    NSDL National Science Digital Library

    del Alamo, Jesus

    The topics of this course include: modeling of microelectronic devices, basic microelectronic circuit analysis and design, physical electronics of semiconductor junction and MOS devices, relation of electrical behavior to internal physical processes, development of circuit models, and understanding the uses and limitations of various models. The course uses incremental and large-signal techniques to analyze and design bipolar and field effect transistor circuits, with examples chosen from digital circuits, single-ended and differential linear amplifiers, and other integrated circuits.

  8. Infrared thermal annealing device

    NASA Astrophysics Data System (ADS)

    Gladys, M. J.; Clarke, I.; O'Connor, D. J.

    2003-07-01

    A device for annealing samples within an ultrahigh vacuum (UHV) scanning tunneling microscopy system was designed, constructed, and tested. The device is based on illuminating the sample with infrared radiation from outside the UHV chamber with a tungsten projector bulb. The apparatus uses an elliptical mirror to focus the beam through a sapphire viewport for low absorption. Experiments were conducted on clean Pd(100) and annealing temperatures in excess of 1000 K were easily reached.

  9. Electromagnetic recording and playback device

    E-print Network

    Chavez, Dylan, 1981-

    2004-01-01

    The purpose of this thesis is the design and manufacture of an electromagnetic recording and playback device. The device was designed to record information onto a steel wire which can replay the signal. The device is of ...

  10. Geriatric assistive devices.

    PubMed

    Bradley, Sara M; Hernandez, Cameron R

    2011-08-15

    Disability and mobility problems increase with age. Assistive devices such as canes, crutches, and walkers can be used to increase a patient's base of support, improve balance, and increase activity and independence, but they are not without significant musculoskeletal and metabolic demands. Most patients with assistive devices have never been instructed on the proper use and often have devices that are inappropriate, damaged, or are of the incorrect height. Selection of a suitable device depends on the patient's strength, endurance, balance, cognitive function, and environmental demands. Canes can help redistribute weight from a lower extremity that is weak or painful, improve stability by increasing the base of support, and provide tactile information about the ground to improve balance. Crutches are useful for patients who need to use their arms for weight bearing and propulsion and not just for balance. Walkers improve stability in those with lower extremity weakness or poor balance and facilitate improved mobility by increasing the patient's base of support and supporting the patient's weight. Walkers require greater attentional demands than canes and make using stairs difficult. The top of a cane or walker should be the same height as the wrist crease when the patient is standing upright with arms relaxed at his or her sides. A cane should be held contralateral to a weak or painful lower extremity and advanced simultaneously with the contralateral leg. Clinicians should routinely evaluate their patients' assistive devices to ensure proper height, fit, and maintenance, and also counsel patients on correct use of the device. PMID:21842786

  11. Electronic security device

    DOEpatents

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

    1992-01-01

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

  12. Multiple thermocouple testing device

    NASA Astrophysics Data System (ADS)

    Hildebrand, J. R.; Sobanski, K. J.

    1986-02-01

    An automated multiple thermocouple testing device determines short and open circuits in a thermocouple system. The thermocouple system that has a plurality of temperature probes, each probe has a first thermocouple. The device applies a direct current voltage to the first thermocouple to cause heating in the second thermocouple and a second thermocouple and then reads the temperature response of the second thermocouple. The first thermocouples have a common lead and the second thermocouples are connected in two parallel groups. The temperature output of the second thermocouple is digitized and read by a computer. These readings are compared to criteria which determine if there is an open circuit. Before the open circuit test is applied, the device also determines which thermocouple probe has a possible short circuit. This device can automatically test for short and open circuits in a thermocouple system within a few minutes without the necessity of removing the probes from their installed position. This device was adapted to perform the above testing on a F100 fan turbine inlet temperature (FTIT) system.

  13. Spectral tailoring device

    DOEpatents

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

    1987-08-05

    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.

  14. Electrical apparatus lockout device

    DOEpatents

    Gonzales, Rick (Chesapeake, VA)

    1999-01-01

    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.

  15. Laser device and method

    SciTech Connect

    Myers, J. D.

    1985-06-25

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

  16. Nonimaging radiant energy device

    DOEpatents

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

    1993-01-01

    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.

  17. Electrochromic optical switching device

    DOEpatents

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

    1992-01-01

    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.

  18. Electrochromic optical switching device

    DOEpatents

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

    1992-08-25

    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.

  19. Pendulum detector testing device

    DOEpatents

    Gonsalves, John M. (Modesto, CA)

    1997-01-01

    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.

  20. Registration of Medical Devices

    PubMed Central

    George, Bobby

    2010-01-01

    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. PMID:21814626

  1. Double face sealing device

    NASA Technical Reports Server (NTRS)

    Weddendorf, Bruce C. (Inventor)

    1991-01-01

    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.

  2. [Electoro-surgical device].

    PubMed

    Matsumura, Yuji

    2009-07-01

    Electro-surgical device is an essential instrument for bloodless surgery after the 1st introduction by Harvey Cushing in 1926. Basal mechanisms of electric scalpels (monopolar and bipolar), current waveforms (cut, coagulation and blend), high-frequency currents and electrical shocks were commented. After 1990s, several new electro-surgical devices such as argon beam coagulator, bipolar scissors and vessel sealing system (LigaSure) were developed and introduced in chest surgery. Argon beam coagulator is useful in sealing and hemostasis of bleeding from chest walls after extrapleural dissections. Bipolar scissors can seal small vessels less than diameter 2 mm and is useful in mediastinal lymphnode dissections. Vessel sealing system is able to seal and cut vessels up to diameter 7 mm. LigaSure V is the most suitable instrument for thymic vein handling in thoracoscopic thymectomy. Clinical applications of these new surgical devices in chest surgery are discussed. PMID:20715684

  3. Evaporative Cooling Membrane Device

    NASA Technical Reports Server (NTRS)

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

    1999-01-01

    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.

  4. Fragment capture device

    DOEpatents

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

    2010-03-30

    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.

  5. Biochip scanner device

    DOEpatents

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

    2001-01-01

    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.

  6. Therapeutic Devices for Epilepsy

    PubMed Central

    Fisher, Robert S.

    2011-01-01

    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. PMID:22367987

  7. Failure Analysis of Passive Devices

    Microsoft Academic Search

    John E. Mann

    1978-01-01

    The failure analysis of passive devices requires all the skills and technology used in the failure analysis of solid state devices. Passive devices use similar manufacturing methods compared to solid state techniques to accomplish the finished device. Thin oxides, used in the manufacturing of tantalum slug capacitors, are subject to current and voltage transients which concern analysts on MOS structures.

  8. Failure analysis of passive devices

    Microsoft Academic Search

    J. E. Mann

    1978-01-01

    The failure analysis of passive devices requires all the skills and technology used in the failure analysis of solid state devices. Passive devices use similar manufacturing methods compared to solid state techniques to accomplish the finished device. Thin oxides, used in the manufacturing of tantalum slug capacitors, are subject to current and voltage transients which concern analysts on MOS structures.

  9. Precision alignment device

    DOEpatents

    Jones, Nelson E. (Huntington Beach, CA)

    1990-01-01

    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.

  10. Precision alignment device

    DOEpatents

    Jones, N.E.

    1988-03-10

    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.

  11. Photovoltaic device and method

    SciTech Connect

    Nath, P.; Barnard, T.J.; Crea, D.

    1986-05-20

    A photovoltaic device is described comprising: an electrically conductive substrate layer; a semiconductor body deposited upon the substrate layer; a transparent conductive layer over at least a portion of the semiconductor body for facilitating collection of electrical current produced by the photovoltaic device; and a bus-grid structure, in contact with the conductive layer, the bus-grid structure comprising a current collecting portion comprising grid fingers and a current carrying portion comprising a busbar structure for carrying current collected by the current collecting portion, the entirety of the current carrying portion which overlies the semiconductor body being electrically insulated from the semiconductor body by a layer of solid material.

  12. Phononic crystal devices

    DOEpatents

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

    2012-01-10

    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.

  13. Electron Waveguide Devices

    NASA Astrophysics Data System (ADS)

    Eugster, Cristopher Conrad

    This thesis explores a new frontier for electronic devices: the electron waveguide regime where the confining dimensions are made comparable to the electron wavelength and scattering is removed from the channel. Motivated by the possibility of implementing an "electron directional coupler", we study this new regime of electron transport with a novel device called a dual electron waveguide device. Such a device consists of three split-gates patterned on top of an AlGaAs/GaAs modulation-doped heterostructure. Under proper bias, two one-dimensional electron waveguides can be formed in close proximity of one another. The middle -gate which is used to control the interaction between the two waveguides is only 30 nm wide. The side-gates are used to control the number of occupied subbands in the two respective waveguides. Since these gates can be independently accessed, many different electron waveguide configurations can be implemented using this novel structure. In this thesis, we study the transport and tunneling characteristics of isolated electron waveguides, leaky electron waveguides and closely spaced electron waveguides using our novel device concept. In the tunneling spectroscopy experiments of leaky electron waveguides, we have dramatically uncovered the 1D subband structure of our electron waveguides. We have also observed for the first time 1D to 1D tunneling between two closely spaced electron waveguides. The resulting pattern in the 1D to 1D tunneling regime is consistent with the energy and momentum conservation laws in the tunneling process. In this thesis, we also investigate some of the more practical issues behind electron waveguide devices. We show how only a few local scatterers in the device can degrade the ideal electron waveguide features. We also show how the increased functionality of our dual electron waveguide devices can be used to implement an efficient analog-to-digital conversion architecture. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge, MA 02139-4307. Ph. 617-253-5668; Fax 617-253-1690.).

  14. Portable emittance measurement device

    SciTech Connect

    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

    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.

  15. Portable emittance measurement device.

    PubMed

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

    2010-02-01

    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

  16. Dielectrophoretic columnar focusing device

    DOEpatents

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

    2010-05-11

    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.

  17. Device Oriented Project Controller

    SciTech Connect

    Dalesio, Leo; Kraimer, Martin

    2013-11-20

    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.

  18. Medical device development

    Microsoft Academic Search

    Dorin Panescu

    2009-01-01

    The development of a successful medical product requires not only engineering design efforts, but also clinical, regulatory, marketing and business expertise. This paper reviews items related to the process of designing medical devices. It discusses the steps required to take a medical product idea from concept, through development, verification and validation, regulatory approvals and market release.

  19. Hybrid electroluminescent devices

    Microsoft Academic Search

    Joseph John Shiang; Anil Raj Duggal; Joseph Darryl Michael

    2010-01-01

    A hybrid electroluminescent (EL) device comprises at least one inorganic diode element and at least one organic EL element that are electrically connected in series. The absolute value of the breakdown voltage of the inorganic diode element is greater than the absolute value of the maximum reverse bias voltage across the series. The inorganic diode element can be a power

  20. Superlattice optical device

    DOEpatents

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

    1986-01-01

    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.

  1. Discourse Devices in Telugu

    ERIC Educational Resources Information Center

    Rani, A. Usha

    2010-01-01

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

  2. Integrated microfluidic devices

    Microsoft Academic Search

    David Erickson; Dongqing Li

    2004-01-01

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

  3. Simulating nanoscale semiconductor devices.

    SciTech Connect

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

    2005-03-01

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

  4. Microwave medical devices

    Microsoft Academic Search

    F. Sterzer

    2002-01-01

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

  5. Fatigue testing device

    NASA Technical Reports Server (NTRS)

    Eichenbrenner, F. E.; Imig, L. A.

    1973-01-01

    Anti-buckling assembly prevents buckling of sheet metal fatigue specimen when axial compressive load is applied. It provides for cyclic heating and cooling of specimen during testing. Assembly permits tests at two locations on specimen. Device has ports for visual, optical, or photographic monitoring of fatigue crack propagation in test specimen.

  6. Cascaded thermoacoustic devices

    DOEpatents

    Swift, Gregory W.; Backhaus, Scott N.; Gardner, David L.

    2003-12-09

    A thermoacoustic device is formed with a resonator system defining at least one region of high specific acoustic impedance in an acoustic wave within the resonator system. A plurality of thermoacoustic units are cascaded together within the region of high specific acoustic impedance, where at least one of the thermoacoustic units is a regenerator unit.

  7. Implantable electrical device

    NASA Technical Reports Server (NTRS)

    Jhabvala, M. D. (inventor)

    1982-01-01

    A fully implantable and self contained device is disclosed composed of a flexible electrode array for surrounding damaged nerves and a signal generator for driving the electrode array with periodic electrical impulses of nanoampere magnitude to induce regeneration of the damaged nerves.

  8. Medical Device Wafer Singulation

    Microsoft Academic Search

    A. Teng; F. Wilhelmsen

    2007-01-01

    Singulation can be the most damaging step in electronic manufacturing where individual dice are freed from a brittle silicon wafer. So much torque and force is applied to the silicon during this process that if precautionary steps are not taken, the freed die may exhibit low strength due to chipping damage. For medical devices, this is particularly a problem because

  9. Electrical Sensing Devices.

    ERIC Educational Resources Information Center

    Montana State Univ., Bozeman. Dept. of Agricultural and Industrial Education.

    This unit of instruction on electrical sensing devices is designed especially for use with freshman vocational agriculture students. A unit plan discusses the general aims and goals, lesson titles, student and teacher activities, and references. The unit consists of four lessons. A lesson plan for each lesson provides these components: need;…

  10. Solar Innovator | Alta Devices

    SciTech Connect

    Mattos, Laila; Le, Minh

    2012-01-01

    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 .

  11. Mobile Library Filming Device.

    ERIC Educational Resources Information Center

    Martin, Claud E.

    This report contains details of the study and performance test of the Mobile Filming Library Device which consists of a camera and self contained power source. Because of the cost savings and service improvement characteristics, this technique involving the use of a microfilm intermediate in the preparation of copies of material filed in full size…

  12. Active radar stealth device

    Microsoft Academic Search

    R. N. Cain; Albert J. Corda

    1991-01-01

    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,

  13. 21 CFR 890.5525 - Iontophoresis device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5525 Iontophoresis device. (a) Iontophoresis device intended for...

  14. Non- contacting capacitive diagnostic device

    DOEpatents

    Ellison, Timothy

    2005-07-12

    A non-contacting capacitive diagnostic device includes a pulsed light source for producing an electric field in a semiconductor or photovoltaic device or material to be evaluated and a circuit responsive to the electric field. The circuit is not in physical contact with the device or material being evaluated and produces an electrical signal characteristic of the electric field produced in the device or material. The diagnostic device permits quality control and evaluation of semiconductor or photovoltaic device properties in continuous manufacturing processes.

  15. Air filtering device

    SciTech Connect

    Backus, A.L.

    1992-07-28

    This patent describes a room air cleaning device. It comprises: a box housing having an air inlet and an air outlet provided therein; a vertical baffle coupled to the box housing opposite the air outlet and spaced form the box housing such that an air egress outlet is formed between the vertical baffle and the box housing; air cleansing means substantially disposed within the box housing and cleansing air passing into the inlet and out of the air egress outlet; a fan disposed within the box housing, the fan providing air movement through the air inlet and the air egress outlet; wherein air exits the room air cleaning device through the air egress outlet as a vertical plane of moving air; and wherein formation of the vertical plane of moving air contributes to the formation of a low pressure area drawing impure air toward the air inlet.

  16. Dielectrokinetic chromatography devices

    DOEpatents

    Chirica, Gabriela S; Fiechtner, Gregory J; Singh, Anup K

    2014-12-16

    Disclosed herein are methods and devices for dielectrokinetic chromatography. As disclosed, the devices comprise microchannels having at least one perturber which produces a non-uniformity in a field spanning the width of the microchannel. The interaction of the field non-uniformity with a perturber produces a secondary flow which competes with a primary flow. By decreasing the size of the perturber the secondary flow becomes significant for particles/analytes in the nanometer-size range. Depending on the nature of a particle/analyte present in the fluid and its interaction with the primary flow and the secondary flow, the analyte may be retained or redirected. The composition of the primary flow can be varied to affect the magnitude of primary and/or secondary flows on the particles/analytes and thereby separate and concentrate it from other particles/analytes.

  17. Support and maneuvering device

    DOEpatents

    Wood, R.L.

    1987-03-23

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

  18. Support and maneuvering device

    DOEpatents

    Wood, Richard L. (Arvada, CO)

    1988-01-01

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

  19. Nuclear reactor safety device

    DOEpatents

    Hutter, Ernest (Wilmette, IL)

    1986-01-01

    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.

  20. Principles of Semiconductor Devices

    NSDL National Science Digital Library

    Van Zeghbroeck, Bart Jozef

    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.

  1. Quick stop device

    DOEpatents

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

    1996-01-01

    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.

  2. Regenerative braking device

    DOEpatents

    Hoppie, Lyle O. (Birmingham, MI)

    1982-01-12

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

  3. Light modulating device

    DOEpatents

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

    1989-12-26

    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.

  4. Light modulating device

    DOEpatents

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

    1989-01-01

    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.

  5. Urine collection device

    NASA Technical Reports Server (NTRS)

    Michaud, R. B. (inventor)

    1981-01-01

    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.

  6. Local laboratory ventilation devices

    SciTech Connect

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

    1995-10-01

    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.

  7. Micro-Organ Devices

    NASA Technical Reports Server (NTRS)

    Gonda, Steven R.; Leslie, Julia; Chang, Robert C.; Starly, Binil; Sun, Wei; Culbertson, Christopher; Holtorf, Heidi

    2009-01-01

    Micro-organ devices (MODs) are being developed to satisfy an emerging need for small, lightweight, reproducible, biological-experimentati on apparatuses that are amenable to automated operation and that imp ose minimal demands for resources (principally, power and fluids). I n simplest terms, a MOD is a microfluidic device containing a variety of microstructures and assemblies of cells, all designed to mimic a complex in vivo microenvironment by replicating one or more in vivo micro-organ structures, the architectures and composition of the extr acellular matrices in the organs of interest, and the in vivo fluid flows. In addition to microscopic flow channels, a MOD contains one or more micro-organ wells containing cells residing in microscopic e xtracellular matrices and/or scaffolds, the shapes and compositions o f which enable replication of the corresponding in vivo cell assembl ies and flows.

  8. Wire brush fastening device

    DOEpatents

    Meigs, R.A.

    1995-09-19

    A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus. 13 figs.

  9. Wire brush fastening device

    DOEpatents

    Meigs, Richard A. (East Concord, NY)

    1995-01-01

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

  10. Organic photosensitive devices

    SciTech Connect

    Peumans, Peter; Forrest, Stephen R.

    2013-01-22

    A photoactive device is provided. The device includes a first electrode, a second electrode, and a photoactive region disposed between and electrically connected to the first and second electrodes. The photoactive region further includes an organic donor layer and an organic acceptor layer that form a donor-acceptor heterojunction. The mobility of holes in the organic donor region and the mobility of electrons in the organic acceptor region are different by a factor of at least 100, and more preferably a factor of at least 1000. At least one of the mobility of holes in the organic donor region and the mobility of electrons in the organic acceptor region is greater than 0.001 cm.sup.2/V-sec, and more preferably greater than 1 cm.sup.2/V-sec. The heterojunction may be of various types, including a planar heterojunction, a bulk heterojunction, a mixed heterojunction, and a hybrid planar-mixed heterojunction.

  11. Stacked organic photosensitive devices

    DOEpatents

    Forrest, Stephen; Xue, Jiangeng; Uchida, Soichi; Rand, Barry P.

    2007-03-27

    A device is provided having a first electrode, a second electrode, a first photoactive region having a characteristic absorption wavelength .lamda..sub.1 and a second photoactive region having a characteristic absorption wavelength .lamda..sub.2. The photoactive regions are disposed between the first and second electrodes, and further positioned on the same side of a reflective layer, such that the first photoactive region is closer to the reflective layer than the second photoactive region. The materials comprising the photoactive regions may be selected such that .lamda..sub.1 is at least about 10% different from .lamda..sub.2. The device may further comprise an exciton blocking layer disposed adjacent to and in direct contact with the organic acceptor material of each photoactive region, wherein the LUMO of each exciton blocking layer other than that closest to the cathode is not more than about 0.3 eV greater than the LUMO of the acceptor material.

  12. Precision alignment device

    SciTech Connect

    Jones, N.E.

    1990-03-13

    This patent describes an 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 servo-motor operated adjustment screws to adjust the position of elements of the structure associated with the main beam to maintain alignment of the main beam.

  13. Heterostructure terahertz devices.

    PubMed

    Ryzhii, Victor

    2008-08-19

    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

  14. Integrated elastic microscope device

    NASA Astrophysics Data System (ADS)

    Lee, W. M.; Wright, D.; Watkins, R.; Cen, Zi

    2015-03-01

    The growing power of imaging and computing power of smartphones is creating the possibility of converting your smartphone into a high power pocket microscopy system. High quality miniature microscopy lenses attached to smartphone are typically made with glass or plastics that can only be produce at low cost with high volume. To revise the paradigm of microscope lenses, we devised a simple droplet lens fabrication technique that which produces low cost and high performance lens. Each lens is integrated into thin 3-D printed holder with complimentary light emitted diode (LEDs) that clips onto majority of smartphones. The integrated device converts a smartphone into a high power optical microscope/dermatoscope at around $2. This low cost device has wide application in a multitude of practical uses such as material inspection, dermascope and educational microscope.

  15. Tire deflation device

    DOEpatents

    Barker, Stacey G. (Idaho Falls, ID) [Idaho Falls, ID

    2010-01-05

    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.

  16. Active radar stealth device

    NASA Astrophysics Data System (ADS)

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

    1991-07-01

    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.

  17. Hybrid electroluminescent devices

    DOEpatents

    Shiang, Joseph John (Niskayuna, NY); Duggal, Anil Raj (Niskayuna, NY); Michael, Joseph Darryl (Schenectady, NY)

    2010-08-03

    A hybrid electroluminescent (EL) device comprises at least one inorganic diode element and at least one organic EL element that are electrically connected in series. The absolute value of the breakdown voltage of the inorganic diode element is greater than the absolute value of the maximum reverse bias voltage across the series. The inorganic diode element can be a power diode, a Schottky barrier diode, or a light-emitting diode.

  18. Polymer microfluidic devices

    Microsoft Academic Search

    Holger Becker; Laurie E. Locascio

    2002-01-01

    Since the introduction of lab-on-a-chip devices in the early 1990s, glass has been the dominant substrate material for their fabrication (J. Chromatogr. 593 (1992) 253; Science 261 (1993) 895). This is primarily driven by the fact that fabrication methods were well established by the semiconductor industry, and surface properties and derivatization methods were well characterized and developed by the chromatography

  19. Atmospheric autorotating imaging device

    NASA Technical Reports Server (NTRS)

    Burke, James D. (Inventor)

    1989-01-01

    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.

  20. Organic Electroluminescent Devices

    Microsoft Academic Search

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

    1996-01-01

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

  1. Thermal Remote Anemometer Device

    NASA Technical Reports Server (NTRS)

    Heyman, Joseph S.; Heath, D. Michele; Winfree, William P.; Miller, William E.; Welch, Christopher S.

    1988-01-01

    Thermal Remote Anemometer Device developed for remote, noncontacting, passive measurement of thermal properties of sample. Model heated locally by scanning laser beam and cooled by wind in tunnel. Thermal image of model analyzed to deduce pattern of airflow around model. For materials applications, system used for evaluation of thin films and determination of thermal diffusivity and adhesive-layer contact. For medical applications, measures perfusion through skin to characterize blood flow and used to determine viabilities of grafts and to characterize tissues.

  2. Fiber optic monitoring device

    DOEpatents

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

    1993-01-01

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

  3. Operated device estimation framework 

    E-print Network

    Rengarajan, Janarthanan

    2009-05-15

    diagnosis [6], [7]. Another artificial intelligence technique, fuzzy logic could be used to account for uncertainties in the input data of distribution system faults. One such method uses feeder topology for fault diagnosis by employing fuzzy rules [8...]. Another method employs feeder topology information, pre-fault and post-fault system configuration information to identify the fault islands, and assigns possibilities to different devices in sections [9]. Many other methods that employ fuzzy logic uses...

  4. Biomolecular detection device

    DOEpatents

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

    2008-10-21

    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.

  5. Mobile Devices for Control

    Microsoft Academic Search

    Brad A. Myers

    2002-01-01

    With today's and tomorrow's wireless technologies, such as IEEE 802.11, BlueTooth, RF-Lite, and G3, mobile devices will frequently be in close, interactive communication. Many environments, including offices, meet- ing rooms, automobiles and classrooms, already contain many computers and computerized appliances, and the smart homes of the future will have ubiqui- tous embedded computation. When the user enters one of these

  6. Portable emittance measurement device

    Microsoft Academic Search

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

    2010-01-01

    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

  7. Barriers to medical device innovation.

    PubMed

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

    2014-01-01

    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. PMID:24966699

  8. Barriers to medical device innovation

    PubMed Central

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

    2014-01-01

    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. PMID:24966699

  9. Medical Device Interoperability The lack of interoperability between medical devices

    E-print Network

    Medical Device Interoperability The lack of interoperability between medical devices can lead to preventable medical errors and potentially serious inefficiencies that could otherwise be avoided. Overview an accurate diagnostic and treatment discipline, medical devices are playing an ever-increasing role

  10. Multiple equilibrium laboratory devices

    NASA Astrophysics Data System (ADS)

    Whitehead, J. A.

    2001-12-01

    Devices{* } will be demonstrated and videotapes played of a number of laboratory studies that exhibit multiple equilibrium. All devices have two competing effects driving the flow. In two of them, temperature and salinity oppose each other. In another, air and water compete. In a fourth, wave propagation is opposed by inertia. Connection with hypothesized ocean behavior will be made. {* } Whitehead, J. A. 2000 Stratified Convection with Multiple States. Ocean Modelling, 2, 109-121. Whitehead, J. A. W. Gregory Lawson and John Salzig. 2001 Multistate flow devices for geophysical fluid dynamics and climate. American Journal of Physics, 69 546-553. Whitehead, J. A. and P. G. Baines. 2000. Hydraulic Jump Location as a Multiple Equilibrium feature. 2000 Ocean Sciences Meeting, American Geophysical Union, San Antonio Texas, January 25, 2000. Abstract: EOS 80 #46 (Supplement), OS125. Whitehead, J. A. , M. L. E. Timmermans, W. Gregory Lawson, S. N. Bulgakov, A. M. Zatarian, J. F. A. Medina, and John Salzig, Laboratory studies of thermally and/or Salinity-driven flows with partial mixing: Part 1 Stommel transitions and multiple flow states. In preparation

  11. Pressure energy storage device

    SciTech Connect

    Allison, J. H.

    1985-06-25

    A pressure energy storage device for the storage of kinetic energy of rotation in the form of potential energy of a compressed fluid and for converting the potential energy of the compressed fluid into kinetic energy of rotation. The pressure energy storage device includes a storage reservoir, a compressor driven by a rotating source to deliver pressurized fluid to the storage reservoir, and a primary fluid motor selectively operable to generate rotary motion by drawing off a portion of the pressurized fluid. The pressure energy storage device may be provided with an electric motor to drive the compressor, a generator driven by the primary fluid motor, a secondary fluid motor to drive the compressor by the exhaust fluid from the primary fluid motor, and an auxiliary pressurized fluid outlet, permitting the compressor to be driven by a rotating power source or an electrical power source and permitting the potential energy of the pressurized fluid to be used directly or to be converted to rotary motion or electrical current, as needed.

  12. The Columbus device

    NASA Astrophysics Data System (ADS)

    Salvetti, Matteo

    2005-10-01

    The Columbus device [1] is proposed as one component of a spectrum of experiments needed to explore the physics of fusion burning plasmas. Columbus has a larger volume than Ignitor by about 50%, lower current densities in the magnet systems and capability to sustain longer plasma pulses. The machine preserves the ability to confine, under macroscopically stable conditions, plasmas with peak pressures exceeding 3 MPa, corresponding to ignition at central plasma densities around 10^21 nuclei/m^3 and to reach this regime by ohmic heating alone. The presence of an ICRH system will expand the capabilities of the device. In our opinion, a spectrum of ``Science First'' devices is the only viable path to an efficient fusion program development and plasma ignition is an important milestone to be achieved before undertaking the construction of a Demo reactor requiring minimization of the external heating power. The Iter design envisages that about one third of its heating power be supplied from the outside in order to maintain its plasma pressure at the desired values. The Columbus program is proposed as a U.S. counterpart to the Ignitor project conducted in Italy and to be complementary to it. The machine costs can be minimized by incorporating the main engineering solutions devised for Ignitor. [1] Coppi,B. and Salvetti,M.,``Highlights of the Columbus Concept'', M.I.T. Report, PTP02/06 (2002).

  13. Sectional device handling tool

    DOEpatents

    Candee, Clark B. (Monroeville, PA)

    1988-07-12

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

  14. Double face sealing device

    NASA Technical Reports Server (NTRS)

    Weddendorf, Bruce (inventor)

    1991-01-01

    A double face sealing device is disclosed for mounting between two surfaces to provide an air-tight 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 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.

  15. Thermophotovoltaic energy conversion device

    DOEpatents

    Charache, Greg W. (Clifton Park, NY); Baldasaro, Paul F. (Clifton Park, NY); Egley, James L. (Burnt Hills, NY)

    1998-01-01

    A thermophotovoltaic device and a method for making the thermophotovoltaic device. The device includes an n-type semiconductor material substrate having top and bottom surfaces, a tunnel junction formed on the top surface of the substrate, a region of active layers formed on top of the tunnel junction and a back surface reflector (BSR). The tunnel junction includes a layer of heavily doped n-type semiconductor material that is formed on the top surface of the substrate and a layer of heavily doped p-type semiconductor material formed on the n-type layer. An optional pseudomorphic layer can be formed between the n-type and p-type layers. A region of active layers is formed on top of the tunnel junction. This region includes a base layer of p-type semiconductor material and an emitter layer of n-type semiconductor material. An optional front surface window layer can be formed on top of the emitter layer. An optional interference filter can be formed on top of the emitter layer or the front surface window layer when it is used.

  16. Thermophotovoltaic energy conversion device

    DOEpatents

    Charache, G.W.; Baldasaro, P.F.; Egley, J.L.

    1998-05-19

    A thermophotovoltaic device and a method for making the thermophotovoltaic device are disclosed. The device includes an n-type semiconductor material substrate having top and bottom surfaces, a tunnel junction formed on the top surface of the substrate, a region of active layers formed on top of the tunnel junction and a back surface reflector (BSR). The tunnel junction includes a layer of heavily doped n-type semiconductor material that is formed on the top surface of the substrate and a layer of heavily doped p-type semiconductor material formed on the n-type layer. An optional pseudomorphic layer can be formed between the n-type and p-type layers. A region of active layers is formed on top of the tunnel junction. This region includes a base layer of p-type semiconductor material and an emitter layer of n-type semiconductor material. An optional front surface window layer can be formed on top of the emitter layer. An optional interference filter can be formed on top of the emitter layer or the front surface window layer when it is used. 1 fig.

  17. Polymer devices for photonic applications

    NASA Astrophysics Data System (ADS)

    Wong, W. H.; Liu, K. K.; Chan, K. S.; Pun, E. Y. B.

    2006-02-01

    Polymeric optical waveguides and devices have applications in sensor, signal processing, and communication systems. In this paper, the characteristics of polymer materials are described, and the fabrication and performances of passive and active polymer devices for photonic applications are reviewed.

  18. Wearable multiple sensor acquisition device

    E-print Network

    Elledge, Christopher Lee, 1980-

    2003-01-01

    The wearable multiple sensor acquisition device is targeted as the primary sensor hub for the next revision of the MIThril wearable computer architecture. The device provides 3-axis acceleration sensing, infrared transmission ...

  19. Advanced Semiconductor Devices

    NASA Astrophysics Data System (ADS)

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

    2007-06-01

    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.

  20. Device Management in the IMS

    Microsoft Academic Search

    Jun Ma; Jianxin Liao; Xiaomin Zhu

    2008-01-01

    IMS is the only standardized way to offer IP based services that are enabled by one common core and all types of access networks\\u000a and devices. The management of devices can benefit services enabling and improve user experience. This paper presents the\\u000a device management issues in the IMS. Requirements of device management are presented and a management architecture is proposed

  1. Nonlinear properties of IMPATT devices

    Microsoft Academic Search

    WILLIAM E. SCHROEDER; GEORGE I. HADDAD

    1973-01-01

    The basic principles of IMPATT diodes as microwave devices are reviewed and the current status of these devices concerning power output and efficiency is given. The main purpose of this paper, however, is to discuss the nonlinear properties of these diodes which are useful in the design of amplifiers, oscillators, and other microwave devices. The main results of this paper

  2. The device model of interaction

    Microsoft Academic Search

    Ed Anson

    1982-01-01

    Any interactive system can be described in terms of the devices it involves, and their interconnections. Similarly, each device can be described in terms of simpler devices and their interconnections. Such descriptions are strictly modular, and well structured. This observation allows any system to be described, at all levels, by the same language. Such descriptions have intuitive appeal for hardware

  3. Superconducting quantum-interference devices

    NASA Technical Reports Server (NTRS)

    Peters, P. N.; Holdeman, L. B.

    1975-01-01

    Published document discusses devices which are based on weak-link Josephson elements that join superconductors. Links can take numerous forms, and circuitry utilizing links can perform many varied functions with unprecedented sensitivity. Theoretical review of Josephson's junctions include tunneling junctions, point contact devices, microbridges, and proximity-effect devices.

  4. FDA's perspectives on cardiovascular devices.

    PubMed

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

    2009-06-01

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

  5. Improved Thermoelectric Devices: Advanced Semiconductor Materials for Thermoelectric Devices

    SciTech Connect

    None

    2009-12-11

    Broad Funding Opportunity Announcement Project: Phononic Devices is working to recapture waste heat and convert it into usable electric power. To do this, the company is using thermoelectric devices, which are made from advanced semiconductor materials that convert heat into electricity or actively remove heat for refrigeration and cooling purposes. Thermoelectric devices resemble computer chips, and they manage heat by manipulating the direction of electrons at the nanoscale. These devices aren’t new, but they are currently too inefficient and expensive for widespread use. Phononic Devices is using a high-performance, cost-effective thermoelectric design that will improve the device’s efficiency and enable electronics manufacturers to more easily integrate them into their products.

  6. Water flow controller device

    SciTech Connect

    Fender, W.

    1980-07-01

    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 bifurcated hot water outlet connector having a collector return channel and a hot water feed channel; (G) cold water line means connecting said cold water source connector to said cold water inlet connector; (H) collector supply line means connecting said collector; supply connector to said cold water lines means; (I) hot water line means connecting said hot water feed channel of said bifurcated hot water outlet connector to said hot water feed connector; (J) collector line means connecting said collector return channel of said bifurcated hot water outlet connector to said collector return connector; (K) means for circulating water connected within said collector supply line means; (L) means for controlling said circulating means electrically connected to said circulating means; and (M) whereby said cold water source connector may be connected to a cold water source line of said facility plumbing; said hot water feed connector may be connected to a hot water feed line of said facility plumbing; said collector supply connector may be connected to a supply of said solar collecting devise; said collector return connector may be connected to a return line from said solar collecting device; said cold water inlet connector may be connected to a cold water inlet of said water reservior; and said bifurcated hot water connector may be connected to a hot water outlet of said water reservoir.

  7. Air monitoring device

    NASA Technical Reports Server (NTRS)

    Tissandier, Michael D. (Inventor)

    2012-01-01

    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).

  8. Detached rock evaluation device

    DOEpatents

    Hanson, David R. (Golden, CO)

    1986-01-01

    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.

  9. Heat storage device

    SciTech Connect

    Gawron, K.; Mahdjuri, F.; Schroder, J.

    1980-09-02

    A heat storage device is described that is comprised of a closed reservoir within which is positioned a flexible closed container of smaller volume. The flexible container encloses a liquefiable heat-accumulating material; and the reservoir is provided with a heat-transport medium outside of the flexible container. The heat-transport medium always remains in the liquid phase and, upon solidification and shrinkage of the heat-accumulating material, fills the spaces thus formed between the flexible container and the reservoir wall in order to maintain adequate transfer of heat.

  10. Biofilms on medical devices.

    PubMed

    Talsma, Silke S

    2007-10-01

    Biofilm consists of microorganisms with altered phenotypes living in a self-organized, cooperative community attached to surfaces and each other and embedded in a self-produced matrix of exopolymer saccharides. Biofilms are relevant for home care and hospice clinicians because they are related to the majority of infectious diseases. Colonization of medical devices plays a key role in the problem of healthcare-associated infections. This article aims to provide an overview of the science of biofilms. Understanding biofilms and the risks associated with them is the first step toward prevention of biofilm formation and the potentially serious outcomes of infections. PMID:18049256

  11. Drop foot corrective device

    NASA Technical Reports Server (NTRS)

    Deis, B. C. (inventor)

    1986-01-01

    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.

  12. Controllable Mirror Devices

    NASA Technical Reports Server (NTRS)

    1992-01-01

    A deformable Mirror Device (DMD) is a type of spatial light modulator in which mirrors fabricated monolithically on a silicon chip are deformed, or tilted, under electronic control to change the direction of light that falls upon the mirror. NASA and Texas Instruments (TI) have worked to develop this technology, which has subsequently been commercialized by TI. Initial application is the DMD 2000 Travel Information Printer for high speed, high volume printing of airline tickets and boarding passes. Other possible applications range from real-time object tracking to advanced industrial machine vision systems.

  13. Advanced Resistive Exercise Device

    NASA Technical Reports Server (NTRS)

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

    2007-01-01

    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.

  14. Silicon active photonic devices

    NASA Astrophysics Data System (ADS)

    Dimitropoulos, Dimitrios

    Active photonic devices utilizing the optical nonlinearities of silicon have emerged in the last 5 years and the effort for commercial photonic devices in the material that has been the workhorse of electronics has been building up since. This dissertation presents the theory for some of these devices. We are concerned herein with CW lasers, amplifiers and wavelength converters that are based on the Raman effect. There have already been cursory experimental demonstrations of these devices and some of their limitations are already apparent. Most of the limitations observed are because of the appearance of effects that are competing with stimulated Raman scattering. Under the high optical powers that are necessary for the Raman effect (tens to hundrends of mW's) the process of optical two-photon (TPA) absorption occurs. The absorption of optical power that it causes itself is weak but in the process electrons and holes are generated which can further absorb light through the free-carrier absorption effect (FCA). The effective "lifetime" that these carriers have determines the magnitude of the FCA loss. We present a model for the carrier lifetime in Silicon-On-Insulator (SOI) waveguides and numerical simulations to understand how this critical parameter varies and how it can be controlled. A p-i-n junction built along SOI waveguides can help achieve lifetime of the order of 20--100 ps but the price one has to pay is on-chip electrical power consumption on the order of 100's of mWs. We model CW Raman lasers and we find that the carrier lifetime reduces the output power. If the carrier lifetime exceeds a certain "critical" value optical losses become overwhelming and lasing is impossible. As we show, in amplifiers, the nonlinear loss does not only result in diminished gain, but also in a higher noise figure. Finally the effect of Coherent anti-Stokes Raman scattering (CARS) is examined. The effect is important because with a pump frequency at 1434nm coherent power transfer can take place between the 1300nm and 1500nm bands which are important for communications. Because of the importance of this process as a potential wavelength converter we examine the fundamental noise figure and photon statistics involved (when FCA losses are absent). We find that the wavelength conversion process has a minimum noise figure close to 3dB. The deviation from that number depends on a single parameter which itself depends on: the ratio of the Raman susceptibilities, the ratio of the indices of refraction and the ratio of frequencies between Stokes and anti-Stokes waves.

  15. Inflatable rescue device

    NASA Technical Reports Server (NTRS)

    Swan, Scott A. (inventor)

    1995-01-01

    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.

  16. Heat transfer device

    NASA Technical Reports Server (NTRS)

    Kalkbrenner, R. W. (inventor)

    1974-01-01

    A heat transfer device is characterized by an hermetically sealed tubular housing including a tubular shell terminating in spaced end plates, and a tubular mesh wick concentrically arranged and operatively supported within said housing. The invention provides an improved wicking restraint formed as an elongated and radially expanded tubular helix concentrically related to the wick and adapted to be axially foreshortened and radially expanded into engagement with the wick in response to an axially applied compressive load. The wick is continuously supported in a contiguous relationship with the internal surfaces of the shell.

  17. Portable hand hold device

    NASA Technical Reports Server (NTRS)

    Redmon, Jr., John W. (Inventor); McQueen, Donald H. (Inventor); Sanders, Fred G. (Inventor)

    1990-01-01

    A hand hold device (A) includes a housing (10) having a hand hold (14) and clamping brackets (32,34) for grasping and handling an object. A drive includes drive lever (23), spur gear (22), and rack gears (24,26) carried on rods (24a, 26a) for moving the clamping brackets. A lock includes ratchet gear (40) and pawl (42) biased between lock and unlock positions by a cantilever spring (46,48) and moved by handle (54). Compliant grip pads (32b, 34b) provide compliance to lock, unlock, and hold an object between the clamp brackets.

  18. Stretchable and foldable electronic devices

    DOEpatents

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

    2014-12-09

    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.

  19. Graphene-based conformal devices.

    PubMed

    Park, Yong Ju; Lee, Seoung-Ki; Kim, Min-Seok; Kim, Hyunmin; Ahn, Jong-Hyun

    2014-08-26

    Despite recent progress in bendable and stretchable thin-film transistors using novel designs and materials, the development of conformal devices remains limited by the insufficient flexibility of devices. Here, we demonstrate the fabrication of graphene-based conformal and stretchable devices such as transistor and tactile sensor on a substrate with a convoluted surface by scaling down the device thickness. The 70 nm thick graphene-based conformal devices displayed a much lower bending stiffness than reported previously. The demonstrated devices provided excellent conformal coverage over an uneven animal hide surface without the need for an adhesive. In addition, the ultrathin graphene devices formed on the three-dimensionally curved animal hide exhibited stable electrical characteristics, even under repetitive bending and twisting. The advanced performance and flexibility demonstrated here show promise for the development and adoption of wearable electronics in a wide range of future applications. PMID:25073058

  20. Organic photoresponse materials and devices.

    PubMed

    Dong, Huanli; Zhu, Hongfei; Meng, Qing; Gong, Xiong; Hu, Wenping

    2012-03-01

    Organic photoresponse materials and devices are critically important to organic optoelectronics and energy crises. The activities of photoresponse in organic materials can be summarized in three effects, photoconductive, photovoltaic and optical memory effects. Correspondingly, devices based on the three effects can be divided into (i) photoconductive devices such as photodetectors, photoreceptors, photoswitches and phototransistors, (ii) photovoltaic devices such as organic solar cells, and (iii) optical data storage devices. It is expected that this systematic analysis of photoresponse materials and devices could be a guide for the better understanding of structure-property relationships of organic materials and provide key clues for the fabrication of high performance organic optoelectronic devices, the integration of them in circuits and the application of them in renewable green energy strategies (critical review, 452 references). PMID:22158983

  1. Human Factors and Medical Devices

    SciTech Connect

    Dick Sawyer

    1998-12-31

    Medical device hardware- and software-driven user interfaces should be designed to minimize the likelihood of use-related errors and their consequences. The role of design-induced errors in medical device incidents is attracting widespread attention. The U.S. Food and Drug Administration (FDA) is fully cognizant that human factors engineering is critical to the design of safe medical devices, and user interface design is receiving substantial attention by the agency. Companies are paying more attention to the impact of device design, including user instructions, upon the performance of those health professionals and lay users who operate medical devices. Concurrently, the FDA is monitoring human factors issues in its site inspections, premarket device approvals, and postmarket incident evaluations. Overall, the outlook for improved designs and safer device operation is bright.

  2. Charge coupled devices

    NASA Technical Reports Server (NTRS)

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

    1977-01-01

    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.

  3. Fluid flow monitoring device

    DOEpatents

    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

    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.

  4. Fluid flow monitoring device

    DOEpatents

    McKay, M.D.; Sweeney, C.E.; Spangler, B.S. Jr.

    1993-11-30

    A flow meter and temperature measuring device are described 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. 7 figures.

  5. Payload retention device

    NASA Technical Reports Server (NTRS)

    Monford, Leo G., Jr. (inventor)

    1992-01-01

    A payload retention device for grappling and retaining a payload in docked position on a supporting structure in the cargo bay of a space vehicle is presented. The device comprises a two-fault tolerant electromagnetic grappling system comprising electromagnets for attracting and grappling a grapple strike plate affixed to the payload when in proximity thereto and an electromechanical latching assembly comprising a pair of independent latching subassemblies. Each subassembly comprises a set of latching pawls which are driven into latching and unlatching positions relative to a grappled payload by a pair of gearmotors, each equipped with a ratchet clutch drive mechanism which is two-fault tolerant with respect to latching such that only one gearmotor of the four needs to be operational to effect a latch of the payload but is single fault tolerant with respect to release of a latched payload. Sensors are included for automatically sensing the magnetic grappling of a payload and for automatically de-energizing the gearmotors of the latching subassemblies when a latch condition is achieved.

  6. Thermoplastic tape compaction device

    DOEpatents

    Campbell, V.W.

    1994-12-27

    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.

  7. Nanophotonics: materials and devices

    NASA Astrophysics Data System (ADS)

    Levy, Uriel; Tsai, Chia-Ho; Nezhad, M.; Nakagawa, Wataru; Chen, C.-H.; Tetz, Kevin A.; Pang, L.; Fainman, Yeshaiahu

    2004-07-01

    Optical technology plays an increasingly important role in numerous applications areas, including communications, information processing, and data storage. However, as optical technology develops, it is evident that there is a growing need to develop reliable photonic integration technologies. This will include the development of passive as well as active optical components that can be integrated into functional optical circuits and systems, including filters, switching fabrics that can be controlled either electrically or optically, optical sources, detectors, amplifiers, etc. We explore the unique capabilities and advantages of nanotechnology in developing next generation integrated photonic chips. Our long-range goal is to develop a range of photonic nanostructures including artificially birefringent and resonant devices, photonic crystals, and photonic crystals with defects to tailor spectral filters, and nanostructures for spatial field localization to enhance optical nonlinearities, to facilitate on-chip system integration through compatible materials and fabrication processes. The design of artificial nanostructured materials, PCs and integrated photonic systems is one of the most challenging tasks as it not only involves the accurate solution of electromagnetic optics equations, but also the need to incorporate the material and quantum physics equations. Near-field interactions in artificial nanostructured materials provide a variety of functionalities useful for optical systems integration. Furthermore, near-field optical devices facilitate miniaturization, and simultaneously enhance multifunctionality, greatly increasing the functional complexity per unit volume of the photonic system. Finally and most importantly, nanophotonics may enable easier integration with other nanotechnologies: electronics, magnetics, mechanics, chemistry, and biology.

  8. Smart hydrogels in devices

    NASA Astrophysics Data System (ADS)

    Graham, Neil B.

    1994-09-01

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

  9. Carbon based prosthetic devices

    SciTech Connect

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

    1998-12-31

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

  10. EDITORIAL: Photonic Crystal Devices

    NASA Astrophysics Data System (ADS)

    Bhattacharya, Pallab K.

    2007-05-01

    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.

  11. 21 CFR 868.5675 - Rebreathing device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Rebreathing device. 868.5675 Section 868.5675 Food and...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES ANESTHESIOLOGY DEVICES Therapeutic Devices § 868.5675...

  12. 21 CFR 801.109 - Prescription devices.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 false Prescription devices. 801.109 Section 801.109...AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Exemptions From Adequate...Use § 801.109 Prescription devices. A device which,...

  13. 21 CFR 801.109 - Prescription devices.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...2012-04-01 false Prescription devices. 801.109 Section 801.109...AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Exemptions From Adequate...Use § 801.109 Prescription devices. A device which,...

  14. 21 CFR 868.5675 - Rebreathing device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 2013-04-01 false Rebreathing device. 868.5675 Section 868.5675 Food and...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES ANESTHESIOLOGY DEVICES Therapeutic Devices § 868.5675...

  15. 21 CFR 801.109 - Prescription devices.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 false Prescription devices. 801.109 Section 801.109...AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Exemptions From Adequate...Use § 801.109 Prescription devices. A device which,...

  16. Opportunistic, collaborative and synchronized, proximal device ecology

    E-print Network

    Toledano, Eyal

    2013-01-01

    CoSync is an on-device software framework for coordinating proximal consumer electronic devices in order to create a synchronized, opportunistic and collaborative device ecology. The CoSync device ecology combines multiple ...

  17. Electrical safety device

    SciTech Connect

    White, D.B.

    1990-09-06

    This invention consists of an electrical safety device for use in power tools that is designed to automatically discontinue operation of the power tool upon physical contact of the tool with a concealed conductive material. A step down transformer is used to supply the operating power for a disconnect relay and reset delay. When physical contact is made between the power tool and the conductive material, an electrical circuit through the disconnect relay is completed and the operation of the power tool is automatically interrupted. Once the contact between the tool and conductive material is broken, the power tool can be quickly and easily reactivated by a reset push button activating the reset relay. A remote reset is provided for convenience and efficiency of operation.

  18. Magnetoelectric Devices for Spintronics

    NASA Astrophysics Data System (ADS)

    Fusil, S.; Garcia, V.; Barthélémy, A.; Bibes, M.

    2014-07-01

    The control of magnetism by electric fields is an important goal for the future development of low-power spintronics. Various approaches have been proposed on the basis of either single-phase multiferroic materials or hybrid structures in which a ferromagnet is influenced by the electric field applied to an adjacent insulator (usually having a ferroelectric, piezoelectric, or multiferroic character). The electric field effect on magnetism can be driven by purely electronic or electrostatic effects or can occur through strain coupling. Here we review progress in the electrical control of magnetic properties (anisotropy, spin order, ordering temperature, domain structure) and its application to prototype spintronic devices (spin valves, magnetic tunnel junctions). We tentatively identify the main outstanding difficulties and give perspectives for spintronics and other fields.

  19. Ultrasonography of intrauterine devices.

    PubMed

    Nowitzki, Kristina M; Hoimes, Matthew L; Chen, Byron; Zheng, Larry Z; Kim, Young H

    2015-07-01

    The intrauterine device (IUD) is gaining popularity as a reversible form of contraception. Ultrasonography serves as first-line imaging for the evaluation of IUD position in patients with pelvic pain, abnormal bleeding, or absent retrieval strings. This review highlights the imaging of both properly positioned and malpositioned IUDs. The problems associated with malpositioned IUDs include expulsion, displacement, embedment, and perforation. Management considerations depend on the severity of the malposition and the presence or absence of symptoms. Three-dimensional ultrasonography has proven to be more sensitive in the evaluation of more subtle findings of malposition, particularly side-arm embedment. Familiarity with the ultrasonographic features of properly positioned and malpositioned IUDs is essential. PMID:25985959

  20. Programmable logic devices

    NASA Astrophysics Data System (ADS)

    Jacobs, J. L.

    1993-04-01

    Erasable programmable logic devices (EPLD's) were investigated to determine their advantages and/or disadvantages in Test Equipment Engineering applications. It was found that EPLD's performed as well as or better than identical circuits using standard transistor transistor logic (TTL). The chip count in these circuits was reduced, saving printed circuit board space and shortening fabrication and prove-in time. Troubleshooting circuits of EPLD's was also easier with 10 to 100 times fewer wires needed. The reduced number of integrated circuits (IC's) contributed to faster system speeds and an overall lower power consumption. In some cases changes to the circuit became software changes using EPLD's instead of hardware changes for standard logic. Using EPLD's was fairly easy; however, as with any new technology, a learning curve must be overcome before EPLD's can be used efficiently. The many benefits of EPLD's outweighed this initial inconvenience.

  1. Downhole thermoacoustic device

    SciTech Connect

    Kuznetsov, O. L.; Malchenok, V. O.; Maxutov, R. A.; Mordukhaev, K. M.; Ostrovsky, A. P.

    1985-12-17

    A downhole thermoacoustic device comprises a heater with a terminal chamber, connected to a source or radiator of acoustic oscillation, including a hollow housing having mounted therein a longitudinal shaft carrying coils with cores in the form of a plurality of flat rings of a magnetostrictive material, operable as the active elements adapted to generate acoustic oscillation. Accommodated intermediate the coils is a member for focusing the acoustic field, in the form of a sleeve, while the longitudinal shaft carries a tube-shaped reflector of acoustic oscillation internally of the core of each coil. The top and bottom portions of the hollow housing of the radiator of acoustic oscillation have mounted therein damping elements including sleeves of a resilient material, while a heat-insulating member including a sleeve with a fluted surface is provided intermediate the terminal chamber of the heater and the hollow housing of the radiator.

  2. Capacitance measuring device

    DOEpatents

    Andrews, W.H. Jr.

    1984-08-01

    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.

  3. [Individual protective devices: gloves].

    PubMed

    Zannol, F

    2003-01-01

    Gloves are an essential device to avoid cutaneous contact with aggressive agents. There is no "ideal glove"; therefore, it is necessary to select them on the basis of their effectiveness. Gloves can protect from different hazards: mechanical, chemical, biological, thermical and electrical. Specific protective gloves can be used for certain risk factors: i.e. welding operations, concussions and vibrations, food manipulation and health care. Protecting gloves are made of different materials, natural and synthetic, according to the risk they are projected for. Often the same glove can protect against multiple hazards. Finally, the choice of an "adequate" glove should be the result of a fruitful collaboration among employers, industrial hygienists and occupational physician. PMID:12872506

  4. Laser beam steering device

    NASA Technical Reports Server (NTRS)

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

    1993-01-01

    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.

  5. Optical storage device

    NASA Technical Reports Server (NTRS)

    Welch, Sharon S.

    1991-01-01

    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.

  6. Light emitting ceramic device

    DOEpatents

    Valentine, Paul; Edwards, Doreen D.; Walker, Jr., William John; Slack, Lyle H.; Brown, Wayne Douglas; Osborne, Cathy; Norton, Michael; Begley, Richard

    2010-05-18

    A light-emitting ceramic based panel, hereafter termed "electroceramescent" panel, is herein claimed. The electroceramescent panel is formed on a substrate providing mechanical support as well as serving as the base electrode for the device. One or more semiconductive ceramic layers directly overlay the substrate, and electrical conductivity and ionic diffusion are controlled. Light emitting regions overlay the semiconductive ceramic layers, and said regions consist sequentially of a layer of a ceramic insulation layer and an electroluminescent layer, comprised of doped phosphors or the equivalent. One or more conductive top electrode layers having optically transmissive areas overlay the light emitting regions, and a multi-layered top barrier cover comprising one or more optically transmissive non-combustible insulation layers overlay said top electrode regions.

  7. Tube coupling device

    NASA Technical Reports Server (NTRS)

    Myers, William N. (inventor); Hein, Leopold A. (inventor)

    1987-01-01

    A first annular ring of a tube coupling device has a keyed opening sized to fit around the nut region of a male coupling, and a second annular ring has a keyed opening sized to fit around the nut of a female coupling. Each ring has mating ratchet teeth and these rings are biased together, thereby engaging these teeth and preventing rotation of these rings. This in turn prevents the rotation of the male nut region with respect to the female nut. For tube-to-bulkhead locking, one facet of one ring is notched, and a pin is pressed into an opening in the bulkhead. This pin is sized to fit within one of the notches in the ring, thereby preventing rotation of this ring with respect to the bulkhead.

  8. Ceramics for fusion devices

    SciTech Connect

    Clinard, F.W. Jr.

    1984-01-01

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

  9. Nuclear reactor safety device

    DOEpatents

    Hutter, E.

    1983-08-15

    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.

  10. Polarization Perception Device

    NASA Technical Reports Server (NTRS)

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

    1997-01-01

    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.

  11. Rotary encoding device

    NASA Technical Reports Server (NTRS)

    Leviton, Douglas B. (inventor)

    1993-01-01

    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.

  12. Ultrasonography of intrauterine devices

    PubMed Central

    Nowitzki, Kristina M.; Hoimes, Matthew L.; Chen, Byron; Zheng, Larry Z.; Kim, Young H.

    2015-01-01

    The intrauterine device (IUD) is gaining popularity as a reversible form of contraception. Ultrasonography serves as first-line imaging for the evaluation of IUD position in patients with pelvic pain, abnormal bleeding, or absent retrieval strings. This review highlights the imaging of both properly positioned and malpositioned IUDs. The problems associated with malpositioned IUDs include expulsion, displacement, embedment, and perforation. Management considerations depend on the severity of the malposition and the presence or absence of symptoms. Three-dimensional ultrasonography has proven to be more sensitive in the evaluation of more subtle findings of malposition, particularly side-arm embedment. Familiarity with the ultrasonographic features of properly positioned and malpositioned IUDs is essential. PMID:25985959

  13. Flywheel energy storage device

    SciTech Connect

    Scheller, W.G.

    1987-05-26

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

  14. Air bag restraint device

    DOEpatents

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

    1995-10-17

    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.

  15. Air bag restraint device

    DOEpatents

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

    1995-01-01

    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.

  16. Polarization perception device

    NASA Technical Reports Server (NTRS)

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

    1992-01-01

    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.

  17. Silicon Nanowire Devices

    NASA Astrophysics Data System (ADS)

    Kamins, Theodore

    2006-03-01

    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.

  18. Engine starter protecting device

    SciTech Connect

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

    1986-11-18

    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.

  19. 75 FR 55803 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-14

    ...Devices Panel of the Medical Devices Advisory Committee; Notice...of Committee: Neurological Devices Panel of the Medical Devices Advisory Committee. General...recommendations regarding clinical trial design issues for devices...

  20. 21 CFR 801.63 - Medical devices; warning statements for devices containing or manufactured with...

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...2012-04-01 2012-04-01 false Medical devices; warning statements for devices...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Labeling Requirements...Over-the-Counter Devices § 801.63 Medical devices; warning statements for...

  1. 21 CFR 801.63 - Medical devices; warning statements for devices containing or manufactured with...

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 2014-04-01 false Medical devices; warning statements for devices...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Labeling Requirements...Over-the-Counter Devices § 801.63 Medical devices; warning statements for...

  2. 21 CFR 801.63 - Medical devices; warning statements for devices containing or manufactured with...

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 2013-04-01 false Medical devices; warning statements for devices...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES LABELING Labeling Requirements...Over-the-Counter Devices § 801.63 Medical devices; warning statements for...

  3. Candida Infections of Medical Devices

    PubMed Central

    Kojic, Erna M.; Darouiche, Rabih O.

    2004-01-01

    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. PMID:15084500

  4. Human Factors and Medical Devices

    Microsoft Academic Search

    Dick Sawyer

    1998-01-01

    Medical device hardware- and software-driven user interfaces should be designed to minimize the likelihood of use-related errors and their consequences. The role of design-induced errors in medical device incidents is attracting widespread attention. The U.S. Food and Drug Administration (FDA) is fully cognizant that human factors engineering is critical to the design of safe medical devices, and user interface design

  5. Stabilizing Semiconductor Devices With Hydrogen

    NASA Technical Reports Server (NTRS)

    Overhauser, Albert W.; Maserjian, Joseph

    1989-01-01

    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.

  6. Structured wafer for device processing

    SciTech Connect

    Okandan, Murat; Nielson, Gregory N

    2014-11-25

    A structured wafer that includes through passages is used for device processing. Each of the through passages extends from or along one surface of the structured wafer and forms a pattern on a top surface area of the structured wafer. The top surface of the structured wafer is bonded to a device layer via a release layer. Devices are processed on the device layer, and are released from the structured wafer using etchant. The through passages within the structured wafer allow the etchant to access the release layer to thereby remove the release layer.

  7. Structured wafer for device processing

    SciTech Connect

    Okandan, Murat; Nielson, Gregory N

    2014-05-20

    A structured wafer that includes through passages is used for device processing. Each of the through passages extends from or along one surface of the structured wafer and forms a pattern on a top surface area of the structured wafer. The top surface of the structured wafer is bonded to a device layer via a release layer. Devices are processed on the device layer, and are released from the structured wafer using etchant. The through passages within the structured wafer allow the etchant to access the release layer to thereby remove the release layer.

  8. Microbiopsy/precision cutting devices

    DOEpatents

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

    1999-07-27

    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.

  9. Highly Efficient Multilayer Thermoelectric Devices

    NASA Technical Reports Server (NTRS)

    Boufelfel, Ali

    2006-01-01

    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.

  10. Material bagging device

    DOEpatents

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

    1984-01-01

    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.

  11. Cable load sensing device

    DOEpatents

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

    1998-01-01

    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.

  12. Temperature differential detection device

    DOEpatents

    Girling, P.M.

    1986-04-22

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

  13. Energy recovery device

    SciTech Connect

    Evans, V.

    1982-08-31

    The energy recovery device includes a housing having a central shaft which is connected to a lever operating a work-load system capable of generating work-load forces. The central shaft is also connected to a disk having four posts generally parallel to the shaft and initially located at positions corresponding to the four major points of a compass. Within each corner of the housing, a helically coiled spring is positioned over a support post. Each spring has two extending arms which contact two respective adjacent posts on the disk so as to maintain the spring under tension. When the lever is at the neutral position, I.E., when no work-load forces are generated, the recovery forces generated by the four springs within the housing are generally balanced. As the lever is displaced from the neutral position by a driving force, the disk rotates whereby the angular displacement between the arms of any spring decreases. Once the disk is displaced, the spring forces aid in continuing displacement of the disk. Simultaneously the work-load system generates forces which oppose any displacement. The springs are preferably configured and dimensioned so that, at any given displacement of the lever from the neutral position, the recovery forces generally counterbalance the work-load forces. Thus the lever will remain at a given displacement when the driving force applied to the lever is removed. Additionally, the counterbalancing of forces permits continued displacement of the lever with a minimal and constant driving force.

  14. A SURVEY OF AUTOINSTRUCTIONAL DEVICES.

    ERIC Educational Resources Information Center

    KOPSTEIN, FELIX F.; SHILLESTAD, ISABEL J.

    THE STATE OF THE ART OF AUTOINSTRUCTION AND TEACHING DEVICES IS SUMMARIZED, AND INSTRUCTIONAL DEVICES DEVELOPED THROUGH APRIL 1961 ARE CATALOGED WITH THE AIM OF SUGGESTING POSSIBLE APPLICATIONS TO LOCAL TRAINING OR EDUCATIONAL PROBLEMS. IN THE FIRST SECTION, AN OVERVIEW OF AUTOINSTRUCTION IS PRESENTED. THE INSTRUCTIONAL PRESENTATION IS AIMED AT…

  15. Mobile Device Policy & Program Considerations

    E-print Network

    Fisher, Kathleen

    that allow or restrict personal and business use on the same device? What mobile security measures will your requires a security review Today, many employees are accessing their work email services over mobilePage 1 Mobile Device Policy & Program Considerations To BYOD or not to BYOD (bring

  16. New Applications for NFC Devices

    Microsoft Academic Search

    M. Csapodi; A. Nagy

    2007-01-01

    The communication needs of mobile devices and their mobile users have drastically grown because of the proliferation of such communication and consumer electronics devices. In order to make the establishment of these connections simpler, the Near Field Communication (NFC) technology was created; however, regarding authentication, the hard-to solve contrast of security and usability limits the possibilities and this also stays

  17. NFC Devices: Security and Privacy

    Microsoft Academic Search

    Gerald Madlmayr; Josef Langer; Christian Kantner; Josef Scharinger

    2008-01-01

    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

  18. Reliable Design of Medical Devices

    Microsoft Academic Search

    S J Meldrum

    1998-01-01

    The development of a medical device is a complex process. It requires the integration of a range of diverse disciplines, activities, and regulatory requirements, all of which must be achieved to ensure that the final result is a safe, effective and competitive product. While much of the information required in the process of device development is already in the pubic

  19. Micromachined devices for interfacing neurons

    NASA Astrophysics Data System (ADS)

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

    1998-07-01

    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.

  20. Spring 2014 Device versus ice

    E-print Network

    Minnesota, University of

    .D. The TransMedics Organ Care System is a device that keeps donated lungs warm and breathing during, M.D., says the TransMedics Organ Care System helps doctors evaluate the quality of donated organs questions: When an organ is hooked up to the device, can the amount of time that a donated heart or lung

  1. Glass for Solid State Devices

    NASA Technical Reports Server (NTRS)

    Bailey, R. F.

    1982-01-01

    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.

  2. Electrochromic devices on polyester foil

    Microsoft Academic Search

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

    2003-01-01

    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

  3. Device For Sampling Surface Contamination

    NASA Technical Reports Server (NTRS)

    Delgado, Felix A.; Stern, Susan M.

    1995-01-01

    Specially designed cotton swab suitable for use in clean room. Contamination-sampling device improved version of basic cotton-tipped wooden applicator, designed for extreme cleanliness and to enhance utility for sampling according to exacting specifications. Device does not shed cotton and wood fibers.

  4. A new diagnostic device: KINOX

    Microsoft Academic Search

    A. R. Zaritsky; G. A. Zaritskaya; V. S. Pronin; N. A. Raspopov; M. V. Fock

    2005-01-01

    A new diagnostic device KINOX created at P N Lebedev Physics Institute is described. With this device it is possible to trace the variations of oxygen permeability in erythrocyte membranes during the blood oxygenation. The molecular mechanism responsible for these variations was explained and experimentally tested at P N Lebedev Physics Institute. The diagnostic method is substantiated capable of estimating

  5. Ergonomic material-handling device

    DOEpatents

    Barsnick, Lance E.; Zalk, David M.; Perry, Catherine M.; Biggs, Terry; Tageson, Robert E.

    2004-08-24

    A hand-held ergonomic material-handling device capable of moving heavy objects, such as large waste containers and other large objects requiring mechanical assistance. The ergonomic material-handling device can be used with neutral postures of the back, shoulders, wrists and knees, thereby reducing potential injury to the user. The device involves two key features: 1) gives the user the ability to adjust the height of the handles of the device to ergonomically fit the needs of the user's back, wrists and shoulders; and 2) has a rounded handlebar shape, as well as the size and configuration of the handles which keep the user's wrists in a neutral posture during manipulation of the device.

  6. Impacting device for testing insulation

    NASA Technical Reports Server (NTRS)

    Redmon, J. W. (inventor)

    1984-01-01

    An electro-mechanical impacting device for testing the bonding of foam insulation to metal is descirbed. The device lightly impacts foam insulation attached to metal to determine whether the insulation is properly bonded to the metal and to determine the quality of the bond. A force measuring device, preferably a load cell mounted on the impacting device, measures the force of the impact and the duration of the time the hammer head is actually in contact with the insulation. The impactor is designed in the form of a handgun having a driving spring which can propel a plunger forward to cause a hammer head to impact the insulation. The device utilizes a trigger mechanism which provides precise adjustements, allowing fireproof operation.

  7. Compressed optimization of device architectures

    E-print Network

    Adam Frees; John King Gamble; Daniel R. Ward; Robin Blume-Kohout; M. A. Eriksson; Mark Friesen; S. N. Coppersmith

    2014-09-12

    Recent advances in nanotechnology have enabled researchers to control individual quantum mechanical objects with unprecedented accuracy, opening the door for both quantum and extreme-scale conventional computing applications. As these devices become larger and more complex, the ability to design them for simple control becomes a daunting and computationally infeasible task. Here, motivated by ideas from compressed sensing, we introduce a protocol for Compressed Optimization of Device Architectures (CODA). It leads naturally to a metric for benchmarking device performance and optimizing device designs, and provides a scheme for automating the control of gate operations and reducing their complexity. Because CODA is both experimentally and computationally efficient, it is readily extensible to large systems. We demonstrate the CODA benchmarking and optimization protocols through simulations of up to eight quantum dots in devices that are currently being developed experimentally for quantum computation.

  8. III-Nitride UV Devices

    NASA Astrophysics Data System (ADS)

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

    2005-10-01

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

  9. Control method for prosthetic devices

    NASA Technical Reports Server (NTRS)

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

    1995-01-01

    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.

  10. Optimization of Micromachined Photon Devices

    SciTech Connect

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

    1999-07-18

    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.

  11. Biomedical devices and systems security.

    PubMed

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

    2011-01-01

    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

  12. Handheld ultrasound array imaging device

    NASA Astrophysics Data System (ADS)

    Hwang, Juin-Jet; Quistgaard, Jens

    1999-06-01

    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.

  13. MDCF Tutorial Device Interface and App Development

    E-print Network

    Huth, Michael

    -generated Device Interface (ICE Device Model) Vision: IDE for Driver Development & Validation Vision: Integrated #12;APPENDIX #12;Roles of Components Device Component Represents an interface to a real medical device or which encapsulates a mock (simulated) medical device App Panel Component Provides the control

  14. Evaluation of Handheld Devices for Mobile Learning

    Microsoft Academic Search

    Anastasios A. Economides; Nick Nikolaou

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

  15. [Computerized devices for biological testing].

    PubMed

    Zakharov, I S; Paputskaia, N I; Pozharov, A V; Lepiakhov, A Iu

    1995-01-01

    The paper provides evidence for perspectives of the toxicological equipment for protozoa chemotaxis bioassay, which allows one to solve the problems in preparing a culture, a sample, testing solutions and measurement of protozoan reactions. A Poisson process device was proposed to use for construction of a mathematical model of a protozoan concentration transducer. The experimental findings supported the dependence theoretically forwarded. With the new approach, a BIOTESTER-2 device was designed, which has found its use in controlling the quality of water, antibiotics, in mapping the contamination of areas. The device may be used in the evaluation of the toxicity of biological fluids. PMID:7783588

  16. Split ring containment attachment device

    DOEpatents

    Sammel, Alfred G. (Pittsburgh, PA)

    1996-01-01

    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.

  17. Recent medical devices for tonsillectomy

    PubMed Central

    Sayin, I; Cingi, C

    2012-01-01

    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

  18. 76 FR 48871 - Immunology Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-09

    ...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...

  19. 76 FR 55398 - Immunology Devices Panel of the Medical Devices Advisory Committee: Notice of Postponement of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-07

    ...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...

  20. 75 FR 57968 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-23

    ...Docket No. FDA-2010-N-0001] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice...open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee....

  1. 77 FR 18829 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-28

    ...Docket No. FDA-2012-N-0001] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice...open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee....

  2. 78 FR 25747 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-02

    ...Docket No. FDA-2013-N-0001] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice...open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee....

  3. 76 FR 71983 - Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-21

    ...Docket No. FDA-2011-N-0002] Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee; Notice...open to the public. Name of Committee: Gastroenterology and Urology Devices Panel of the Medical Devices Advisory Committee....

  4. 75 FR 7282 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-18

    ...Administration [Docket No. FDA-2010-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...

  5. 77 FR 18829 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-28

    ...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...

  6. 76 FR 58019 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-19

    ...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...

  7. 77 FR 16038 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-19

    ...Administration [Docket No. FDA-2012-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...

  8. 76 FR 63928 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-14

    ...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...

  9. 78 FR 11208 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-15

    ...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...

  10. 78 FR 67365 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-12

    ...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...

  11. 77 FR 25183 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-27

    ...Administration [Docket No. FDA-2012-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...

  12. 78 FR 55081 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-09

    ...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...

  13. 75 FR 81282 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-27

    ...Administration [Docket No. FDA-2010-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...

  14. 76 FR 36548 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-22

    ...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...

  15. 76 FR 56200 - Circulatory System Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-12

    ...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...

  16. 78 FR 26786 - Microbiology Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-08

    ...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...

  17. Electroactive polymer (EAP) mobility device

    NASA Astrophysics Data System (ADS)

    Stasik, Mark; Moore, Megan; Plaxico, Chuck; Sayre, Jay

    2013-04-01

    Ionomeric polymer-metal composites (IPMCs) are a class of electroactive polymers (EAPs) that silently bend and exert force in response to an applied voltage. In this work, a unique design is presented where IPMCs are used to accomplish rotary motion. A novel feature is that EAP actuation is used in conjunction with gravity to cause rotation. This idea could be used to create a self-driven roller device. Such a roller could resemble a wheel with a circular or cylindrical geometry, or a sphere capable of rolling in all directions. Numerical simulations were performed that show a two dimensional roller device can accomplish rolling motion as a result of IPMC actuation. Experimental data on the deformation performance of fabricated IPMCs was used to drive the numerical simulations of the device. A possible application of this mechanism could be a mobility device on the centimeter scale that can transport a payload silently to a target destination.

  18. Evaluation of harmonic suppression devices

    SciTech Connect

    Tolbert, L.M. [Oak Ridge National Lab., TN (United States); Hollis, H.D.; Hale, P.S. Jr. [Army Center for Public Works, Alexandria, VA (United States)

    1996-09-01

    An assessment has been conducted of five commercially available devices to determine their ability to provide clean sinusoidal voltage to nonlinear loads and to eliminate harmonic currents demanded by nonlinear loads. The devices tested were a passive series-shunt filter, a delta-wye isolation transformer, a ferroresonant magnetic synthesizer, an active power line conditioner, and an active injection mode filter. These devices were installed in existing Department of Energy facilities that had substantial non-linear loads which drew a significant harmonic current. These devices were then compared in the following categories: cancellation of harmonic currents, supply of nondistorted voltage, supply of regulated voltage, elimination of transients and impulses, efficiency, reliability, and cost.

  19. Assistive Listening and Alerting Devices

    MedlinePLUS

    ... devices used in addition to hearing aids and cochlear implants to make more sounds accessible to people with hearing impairment. Specifically, hearing aids and cochlear implants are traditionally designed to enhance conversational speech, in ...

  20. Devices for collecting chemical compounds

    DOEpatents

    Scott, Jill R; Groenewold, Gary S

    2013-12-24

    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.

  1. Device-transparent personal storage

    E-print Network

    Strauss, Jacob A. (Jacob Alo), 1979-

    2010-01-01

    Users increasingly store data collections such as digital photographs on multiple personal devices, each of which typically presents the user with a storage management interface isolated from the contents of all other ...

  2. Personal cooling air filtering device

    DOEpatents

    Klett, James (Knoxville, TN); Conway, Bret (Denver, NC)

    2002-08-13

    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.

  3. Heart failure - surgeries and devices

    MedlinePLUS

    ... used when a person is waiting for a heart transplant . You may need a left ventricular assist device ( ... may be on a waiting list for a heart transplant. Some patients who get a VAD are very ...

  4. Polymer electronic devices and materials.

    SciTech Connect

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

    2006-01-01

    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.

  5. Optical and optoelectronic fiber devices

    E-print Network

    Shapira, Ofer, Ph. D. Massachusetts Institute of Technology

    2007-01-01

    The ability to integrate materials with disparate electrical, thermal, and optical properties into a single fiber structure enabled the realization of fiber devices with diverse and complex functionalities. Amongst those, ...

  6. Fluidic-thermochromic display device

    NASA Technical Reports Server (NTRS)

    Grafstein, D.; Hilborn, E. H.

    1968-01-01

    Fluidic decoder and display device has low-power requirements for temperature control of thermochromic materials. An electro-to-fluid converter translates incoming electrical signals into pneumatics signal of sufficient power to operate the fluidic logic elements.

  7. High voltage lightning grounding device

    NASA Technical Reports Server (NTRS)

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

    1971-01-01

    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.

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

    DOEpatents

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

    2012-05-08

    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.

  9. Medical Device Alarms – The Clinician

    Microsoft Academic Search

    M. Imhoff

    \\u000a The alarms of medical devices are a matter of concern in critical and perioperative care. The high rate of false alarms is\\u000a not only a nuisance for patients and caregivers, but can also compromise patient safety and effectiveness of care. The development\\u000a of alarm systems has lagged behind the technological advances of medical devices over the last 20 years. From

  10. Indirect Blood Pressure Measuring Device

    NASA Technical Reports Server (NTRS)

    Hum, L.; Cole, C. E.

    1973-01-01

    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.

  11. Piezo-phototronic effect devices

    DOEpatents

    Wang, Zhong L.; Yang, Qing

    2013-09-10

    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.

  12. Micromachined devices for wireless communications

    Microsoft Academic Search

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

    1998-01-01

    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

  13. Another dimension in device characterization

    Microsoft Academic Search

    S. Anand

    2000-01-01

    Recent years have witnessed rapid progress in the area of high-resolution characterization of silicon devices by scanning capacitance microscopy (SCM). It is timely to discuss the applications of this technique in a broader context by addressing other types of devices and materials. This article represents a step towards this objective and will review our SCM work focusing on advanced InP-based

  14. Cardiac Device Therapy in Children

    Microsoft Academic Search

    George F. Van Hare

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

  15. CMOL: Devices, Circuits, and Architectures

    Microsoft Academic Search

    Konstantin K. Likharev; Dmitri B. Strukov

    2005-01-01

    This chapter is a brief review of the recent work on various aspects of the prospective hybrid semiconductor\\/nanowire\\/molecular\\u000a (“CMOL”) integrated circuits. The basic idea of such circuits is to combine the advantages of the currently dominating CMOS\\u000a technology (including its flexibility and high fabrication yield) with those of molecular devices with nanometer-scale footprint.\\u000a Two-terminal molecular devices would be self-assembled on

  16. Kinetics of accelerator driven devices

    SciTech Connect

    Perry, R.T.; Buksa, J.; Houts, M.

    1994-09-01

    Kinetic calculations were made to show that subcritical accelerator driven devices are robust and stable. The calculations show that large changes in reactivity that would lead to an uncontrollable excursion in a reactor would lead only to a new power level in subcritical device. Calculations were also made to show the rate of power changes resulting from startup and shutdown, and that methods also exist for continuously monitoring the reactivity of a subcritical system.

  17. Wireless Device Request Form Requested by

    E-print Network

    Wireless Device Request Form Requested by: Department: Employee ID #: St. Francis Xavier University read the Wireless Communications Device Policy. I will maintain this device in good condition and make

  18. 21 CFR 821.4 - Imported devices.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS General Provisions § 821.4 Imported devices. For purposes of this...

  19. 21 CFR 821.4 - Imported devices.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS General Provisions § 821.4 Imported devices. For purposes of this...

  20. 21 CFR 821.4 - Imported devices.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS General Provisions § 821.4 Imported devices. For purposes of this...

  1. 21 CFR 821.4 - Imported devices.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS General Provisions § 821.4 Imported devices. For purposes of this...

  2. 21 CFR 821.4 - Imported devices.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS General Provisions § 821.4 Imported devices. For purposes of this...

  3. 14 CFR 29.687 - Spring devices.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 2012-01-01 false Spring devices. 29.687 Section 29.687 ...Construction Control Systems § 29.687 Spring devices. (a) Each control system spring device whose failure could cause flutter...

  4. 14 CFR 27.687 - Spring devices.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 2014-01-01 false Spring devices. 27.687 Section 27.687 ...Construction Control Systems § 27.687 Spring devices. (a) Each control system spring device whose failure could cause flutter...

  5. 14 CFR 23.687 - Spring devices.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 2012-01-01 false Spring devices. 23.687 Section 23.687 Aeronautics...Construction Control Systems § 23.687 Spring devices. The reliability of any spring device used in the control system must...

  6. 14 CFR 27.687 - Spring devices.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 2013-01-01 false Spring devices. 27.687 Section 27.687 ...Construction Control Systems § 27.687 Spring devices. (a) Each control system spring device whose failure could cause flutter...

  7. 14 CFR 23.687 - Spring devices.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 2013-01-01 false Spring devices. 23.687 Section 23.687 Aeronautics...Construction Control Systems § 23.687 Spring devices. The reliability of any spring device used in the control system must...

  8. 14 CFR 29.687 - Spring devices.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 2013-01-01 false Spring devices. 29.687 Section 29.687 ...Construction Control Systems § 29.687 Spring devices. (a) Each control system spring device whose failure could cause flutter...

  9. 14 CFR 27.687 - Spring devices.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 2012-01-01 false Spring devices. 27.687 Section 27.687 ...Construction Control Systems § 27.687 Spring devices. (a) Each control system spring device whose failure could cause flutter...

  10. 14 CFR 23.687 - Spring devices.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 2014-01-01 false Spring devices. 23.687 Section 23.687 Aeronautics...Construction Control Systems § 23.687 Spring devices. The reliability of any spring device used in the control system must...

  11. 14 CFR 29.687 - Spring devices.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 2014-01-01 false Spring devices. 29.687 Section 29.687 ...Construction Control Systems § 29.687 Spring devices. (a) Each control system spring device whose failure could cause flutter...

  12. 14 CFR 23.459 - Special devices.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...AIRPLANES Structure Ailerons and Special Devices § 23.459 Special devices. The loading for special devices using aerodynamic surfaces (such as slots and spoilers) must be determined from test data. Ground...

  13. 14 CFR 23.459 - Special devices.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...AIRPLANES Structure Ailerons and Special Devices § 23.459 Special devices. The loading for special devices using aerodynamic surfaces (such as slots and spoilers) must be determined from test data. Ground...

  14. 21 CFR 820.130 - Device packaging.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 2014-04-01 false Device packaging. 820.130 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.130 Device packaging. Each...

  15. 21 CFR 820.120 - Device labeling.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...2012-04-01 2012-04-01 false Device labeling. 820.120 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.120 Device labeling. Each...

  16. 21 CFR 820.130 - Device packaging.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...2011-04-01 2011-04-01 false Device packaging. 820.130 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.130 Device packaging. Each...

  17. 21 CFR 820.130 - Device packaging.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 2013-04-01 false Device packaging. 820.130 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.130 Device packaging. Each...

  18. 21 CFR 820.120 - Device labeling.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 2013-04-01 false Device labeling. 820.120 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.120 Device labeling. Each...

  19. 21 CFR 820.120 - Device labeling.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Device labeling. 820.120 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.120 Device labeling. Each...

  20. 21 CFR 820.120 - Device labeling.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...2011-04-01 2011-04-01 false Device labeling. 820.120 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.120 Device labeling. Each...

  1. 21 CFR 820.120 - Device labeling.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 2014-04-01 false Device labeling. 820.120 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.120 Device labeling. Each...

  2. 21 CFR 820.130 - Device packaging.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...2012-04-01 2012-04-01 false Device packaging. 820.130 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.130 Device packaging. Each...

  3. 21 CFR 820.130 - Device packaging.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Device packaging. 820.130 Section...HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.130 Device packaging. Each...

  4. 78 FR 15877 - Taxable Medical Devices; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-13

    ...1545-BJ44 Taxable Medical Devices; Correction...to final regulations...The final regulations provide guidance...of certain medical devices, enacted...Proposed Regulations'', line...of taxable medical device to the...

  5. 76 FR 56294 - Inflatable Personal Flotation Devices

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-13

    ...USCG-2011-0076] RIN 1625-AB60 Inflatable Personal Flotation Devices AGENCY: Coast Guard...standards for inflatable recreational personal flotation devices (PFDs) with current...direct final rule entitled ``Inflatable Personal Flotation Devices'' in the...

  6. 77 FR 19937 - Inflatable Personal Flotation Devices

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-03

    ...USCG-2011-0076] RIN 1625-AB60 Inflatable Personal Flotation Devices AGENCY: Coast Guard...standards for inflatable recreational personal flotation devices (PFDs) with current...OMB Office of Management and Budget PFD Personal flotation device STP Standards...

  7. SLAC All Access: Vacuum Microwave Device Department

    ScienceCinema

    Haase, Andy

    2014-06-13

    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.

  8. 30 CFR 75.815 - Disconnect devices.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Disconnecting devices, except those installed in explosion-proof enclosures, must be capable of interrupting...of the device. Disconnecting devices installed in explosion-proof enclosures must be maintained in accordance with...

  9. 30 CFR 56.14208 - Warning devices.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Warning devices. 56.14208 Section... § 56.14208 Warning devices. (a) Visible warning devices shall be used when parked mobile equipment creates a hazard to persons in other mobile equipment. (b)...

  10. 30 CFR 77.903 - Disconnecting devices.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Disconnecting devices. 77.903 Section 77.903 Mineral...Circuits § 77.903 Disconnecting devices. Disconnecting devices shall be installed in circuits supplying power to portable or mobile equipment and shall provide visual...

  11. 30 CFR 57.14208 - Warning devices.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Warning devices. 57.14208 Section... § 57.14208 Warning devices. (a) Visible warning devices shall be used when parked mobile equipment creates a hazard to persons in other mobile equipment. (b)...

  12. Computational Hemodynamics Involving Artificial Devices

    NASA Technical Reports Server (NTRS)

    Kwak, Dochan; Kiris, Cetin; Feiereisen, William (Technical Monitor)

    2001-01-01

    This paper reports the progress being made towards developing complete blood flow simulation capability in human, especially, in the presence of artificial devices such as valves and ventricular assist devices. Devices modeling poses unique challenges different from computing the blood flow in natural hearts and arteries. There are many elements needed such as flow solvers, geometry modeling including flexible walls, moving boundary procedures and physiological characterization of blood. As a first step, computational technology developed for aerospace applications was extended in the recent past to the analysis and development of mechanical devices. The blood flow in these devices is practically incompressible and Newtonian, and thus various incompressible Navier-Stokes solution procedures can be selected depending on the choice of formulations, variables and numerical schemes. Two primitive variable formulations used are discussed as well as the overset grid approach to handle complex moving geometry. This procedure has been applied to several artificial devices. Among these, recent progress made in developing DeBakey axial flow blood pump will be presented from computational point of view. Computational and clinical issues will be discussed in detail as well as additional work needed.

  13. 21 CFR 872.1740 - Caries detection device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...2011-04-01 2011-04-01 false Caries detection device. 872.1740 Section...DEVICES Diagnostic Devices § 872.1740 Caries detection device. (a) Identification. The caries detection device is a device...

  14. 21 CFR 872.1740 - Caries detection device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 2013-04-01 false Caries detection device. 872.1740...CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1740 Caries detection device. (a) Identification. The caries detection device is a...

  15. 21 CFR 872.1740 - Caries detection device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...2012-04-01 2012-04-01 false Caries detection device. 872.1740...CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1740 Caries detection device. (a) Identification. The caries detection device is a...

  16. 21 CFR 872.1740 - Caries detection device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 2014-04-01 false Caries detection device. 872.1740...CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1740 Caries detection device. (a) Identification. The caries detection device is a...

  17. Semiconductor-based, large-area, flexible, electronic devices

    DOEpatents

    Goyal, Amit (Knoxville, TN)

    2011-03-15

    Novel articles and methods to fabricate the same resulting in flexible, large-area, triaxially textured, single-crystal or single-crystal-like, semiconductor-based, electronic devices are disclosed. Potential applications of resulting articles are in areas of photovoltaic devices, flat-panel displays, thermophotovoltaic devices, ferroelectric devices, light emitting diode devices, computer hard disc drive devices, magnetoresistance based devices, photoluminescence based devices, non-volatile memory devices, dielectric devices, thermoelectric devices and quantum dot laser devices.

  18. Control System for Prosthetic Devices

    NASA Technical Reports Server (NTRS)

    Bozeman, Richard J. (Inventor)

    1996-01-01

    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 of 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 through the full-shrg 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.

  19. Event-recording devices with identification codes

    NASA Technical Reports Server (NTRS)

    Watters, David G. (Inventor); Huestis, David L. (Inventor); Bahr, Alfred J. (Inventor); Vidmar, Robert J. (Inventor)

    2003-01-01

    A recording device allows wireless interrogation to determine its identity and its state. The state indicates whether one or more physical or chemical events have taken place. In effect, the one or more physical or chemical events are recorded by the device. The identity of the device allows it to be distinguished from a number of similar devices. The recording device may be used in an array of devices that allows wireless probing by an interrogation unit. When probed, each device tells the interrogator who it is and what state it is in. The devices allow multiple use and the interrogator may use a logical reset to determine the state of each device. The interrogator can thus easily identify particular items in an array that have reached a particular condition. The device may record the status of each device in a database to maintain a history for each.

  20. 21 CFR 890.5050 - Daily activity assist device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5050 Daily activity assist device. (a) Identification....

  1. 21 CFR 876.5020 - External penile rigidity devices.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5020 External penile rigidity devices. (a) Identification....

  2. 21 CFR 876.5020 - External penile rigidity devices.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5020 External penile rigidity devices. (a) Identification ....

  3. 21 CFR 876.5270 - Implanted electrical urinary continence device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5270 Implanted electrical urinary continence device. (a)...

  4. 21 CFR 876.5320 - Nonimplanted electrical continence device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5320 Nonimplanted electrical continence device. (a)...

  5. 21 CFR 876.5020 - External penile rigidity devices.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5020 External penile rigidity devices. (a) Identification ....

  6. 21 CFR 876.5310 - Nonimplanted, peripheral electrical continence device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5310 Nonimplanted, peripheral electrical continence device. (a)...

  7. 21 CFR 876.5020 - External penile rigidity devices.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5020 External penile rigidity devices. (a) Identification ....

  8. 21 CFR 876.5270 - Implanted electrical urinary continence device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5270 Implanted electrical urinary continence device. (a)...

  9. 21 CFR 876.5310 - Nonimplanted, peripheral electrical continence device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5310 Nonimplanted, peripheral electrical continence device. (a)...

  10. 21 CFR 876.5320 - Nonimplanted electrical continence device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5320 Nonimplanted electrical continence device. (a)...

  11. 21 CFR 876.5310 - Nonimplanted, peripheral electrical continence device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5310 Nonimplanted, peripheral electrical continence device. (a)...

  12. 21 CFR 876.5020 - External penile rigidity devices.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5020 External penile rigidity devices. (a) Identification ....

  13. 21 CFR 876.5320 - Nonimplanted electrical continence device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5320 Nonimplanted electrical continence device. (a)...

  14. 21 CFR 876.5270 - Implanted electrical urinary continence device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5270 Implanted electrical urinary continence device. (a)...

  15. 21 CFR 876.5320 - Nonimplanted electrical continence device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5320 Nonimplanted electrical continence device. (a)...

  16. 21 CFR 876.5310 - Nonimplanted, peripheral electrical continence device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5310 Nonimplanted, peripheral electrical continence device. (a)...

  17. 21 CFR 876.5270 - Implanted electrical urinary continence device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5270 Implanted electrical urinary continence device. (a)...

  18. 21 CFR 876.5310 - Nonimplanted, peripheral electrical continence device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5310 Nonimplanted, peripheral electrical continence device. (a)...

  19. 21 CFR 876.5320 - Nonimplanted electrical continence device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5320 Nonimplanted electrical continence device. (a)...

  20. 21 CFR 876.5270 - Implanted electrical urinary continence device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5270 Implanted electrical urinary continence device. (a)...

  1. 21 CFR 866.2580 - Gas-generating device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

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

  2. 21 CFR 866.2500 - Microtiter diluting and dispensing device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

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

  3. 21 CFR 866.2660 - Microorganism differentiation and identification device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

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

  4. 21 CFR 866.2580 - Gas-generating device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

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

  5. 21 CFR 866.2500 - Microtiter diluting and dispensing device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

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

  6. 21 CFR 866.2660 - Microorganism differentiation and identification device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

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

  7. 21 CFR 882.1540 - Galvanic skin response measurement device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Diagnostic Devices § 882.1540 Galvanic skin response measurement device. (a) Identification. A galvanic skin...

  8. 21 CFR 882.1540 - Galvanic skin response measurement device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Diagnostic Devices § 882.1540 Galvanic skin response measurement device. (a) Identification. A galvanic skin...

  9. 21 CFR 882.1540 - Galvanic skin response measurement device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Diagnostic Devices § 882.1540 Galvanic skin response measurement device. (a) Identification. A galvanic skin...

  10. 21 CFR 882.1540 - Galvanic skin response measurement device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Diagnostic Devices § 882.1540 Galvanic skin response measurement device. (a) Identification. A galvanic skin...

  11. 21 CFR 882.1540 - Galvanic skin response measurement device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Diagnostic Devices § 882.1540 Galvanic skin response measurement device. (a) Identification. A galvanic skin...

  12. 21 CFR 890.5050 - Daily activity assist device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5050 Daily activity assist device. (a) Identification....

  13. 21 CFR 866.2660 - Microorganism differentiation and identification device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

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

  14. 21 CFR 866.2580 - Gas-generating device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

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

  15. 21 CFR 866.2660 - Microorganism differentiation and identification device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

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

  16. 21 CFR 866.2500 - Microtiter diluting and dispensing device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

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

  17. 21 CFR 866.2500 - Microtiter diluting and dispensing device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

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

  18. 21 CFR 866.2580 - Gas-generating device.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

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

  19. 21 CFR 890.5765 - Pressure-applying device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5765 Pressure-applying device. (a)...

  20. 21 CFR 890.5765 - Presssure-applying device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5765 Presssure-applying device. (a)...

  1. 21 CFR 890.5050 - Daily activity assist device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5050 Daily activity assist device. (a)...

  2. 21 CFR 890.5050 - Daily activity assist device.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5050 Daily activity assist device. (a)...

  3. 21 CFR 890.5050 - Daily activity assist device.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5050 Daily activity assist device. (a)...

  4. 21 CFR 890.5765 - Presssure-applying device.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Therapeutic Devices § 890.5765 Presssure-applying device. (a)...

  5. 21 CFR 866.2500 - Microtiter diluting and dispensing device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

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

  6. 21 CFR 866.2580 - Gas-generating device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

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

  7. 21 CFR 866.2660 - Microorganism differentiation and identification device.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

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

  8. Aerosol can waste disposal device

    DOEpatents

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

    1993-12-21

    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.

  9. Graphene based flexible electrochromic devices.

    PubMed

    Polat, Emre O; Balc?, Osman; Kocabas, Coskun

    2014-01-01

    Graphene emerges as a viable material for optoelectronics because of its broad optical response and gate-tunable properties. For practical applications, however, single layer graphene has performance limits due to its small optical absorption defined by fundamental constants. Here, we demonstrated a new class of flexible electrochromic devices using multilayer graphene (MLG) which simultaneously offers all key requirements for practical applications; high-contrast optical modulation over a broad spectrum, good electrical conductivity and mechanical flexibility. Our method relies on electro-modulation of interband transition of MLG via intercalation of ions into the graphene layers. The electrical and optical characterizations reveal the key features of the intercalation process which yields broadband optical modulation up to 55 per cent in the visible and near-infrared. We illustrate the promises of the method by fabricating reflective/transmissive electrochromic devices and multi-pixel display devices. Simplicity of the device architecture and its compatibility with the roll-to-roll fabrication processes, would find wide range of applications including smart windows and display devices. We anticipate that this work provides a significant step in realization of graphene based optoelectronics. PMID:25270391

  10. Graphene based flexible electrochromic devices

    PubMed Central

    Polat, Emre O.; Balc?, Osman; Kocabas, Coskun

    2014-01-01

    Graphene emerges as a viable material for optoelectronics because of its broad optical response and gate-tunable properties. For practical applications, however, single layer graphene has performance limits due to its small optical absorption defined by fundamental constants. Here, we demonstrated a new class of flexible electrochromic devices using multilayer graphene (MLG) which simultaneously offers all key requirements for practical applications; high-contrast optical modulation over a broad spectrum, good electrical conductivity and mechanical flexibility. Our method relies on electro-modulation of interband transition of MLG via intercalation of ions into the graphene layers. The electrical and optical characterizations reveal the key features of the intercalation process which yields broadband optical modulation up to 55 per cent in the visible and near-infrared. We illustrate the promises of the method by fabricating reflective/transmissive electrochromic devices and multi-pixel display devices. Simplicity of the device architecture and its compatibility with the roll-to-roll fabrication processes, would find wide range of applications including smart windows and display devices. We anticipate that this work provides a significant step in realization of graphene based optoelectronics. PMID:25270391

  11. Graphene based flexible electrochromic devices

    NASA Astrophysics Data System (ADS)

    Polat, Emre O.; Balc?, Osman; Kocabas, Coskun

    2014-10-01

    Graphene emerges as a viable material for optoelectronics because of its broad optical response and gate-tunable properties. For practical applications, however, single layer graphene has performance limits due to its small optical absorption defined by fundamental constants. Here, we demonstrated a new class of flexible electrochromic devices using multilayer graphene (MLG) which simultaneously offers all key requirements for practical applications; high-contrast optical modulation over a broad spectrum, good electrical conductivity and mechanical flexibility. Our method relies on electro-modulation of interband transition of MLG via intercalation of ions into the graphene layers. The electrical and optical characterizations reveal the key features of the intercalation process which yields broadband optical modulation up to 55 per cent in the visible and near-infrared. We illustrate the promises of the method by fabricating reflective/transmissive electrochromic devices and multi-pixel display devices. Simplicity of the device architecture and its compatibility with the roll-to-roll fabrication processes, would find wide range of applications including smart windows and display devices. We anticipate that this work provides a significant step in realization of graphene based optoelectronics.

  12. Survey of cryogenic semiconductor devices

    SciTech Connect

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

    1996-04-01

    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.

  13. Power semiconductor materials and devices

    SciTech Connect

    Pearton, S.J.; Shul, R.J.; Wolfgang, E.; Ren, F.; Tenconi, S. [eds.

    1997-07-01

    Innovative silicon concepts and nonsilicon materials such as SiC, diamond and group-III nitrides are finding interest for new generations of electronic devices operational at much higher voltages and temperatures than conventional lower-power transistors and integrated circuits. Improved bulk and epitaxial growth, processing, device design and circuit architecture, bonding, testing and packaging are all necessary for realization of new applications. It seems clear from the symposium that Si will continue to dominate most power electronics applications for the next decade, while SiC is by far the most mature of the newer materials technologies. The group-III nitrides are also extremely attractive because of their excellent transport properties and the availability of heterostructures. It is likely that hybrid GaN/SiC devices will have a role due to the need for high thermal conductivity substrates for thermal management. Diamond appears to be trailing because of the inability to dope with donor impurities, although in principle, its properties are probably better suited to high-temperature applications than many other materials. Summaries of these topics are provided by invited review papers, while contributed and poster papers describe work in progress. Topics include: new boule growth techniques for ultra-high-purity Si and wide-bandgap materials; CVD and epitaxial techniques for power materials; high-power/high-temperature device structures; advanced wafer-scale thermal management; simulation tools specific to high-power devices; advanced processing techniques; and packaging/testing at high currents/temperatures.

  14. Compact, Controlled Resistance Exercise Device

    NASA Technical Reports Server (NTRS)

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

    2011-01-01

    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.

  15. Survey of hydrogen monitoring devices

    SciTech Connect

    Lai, W.

    1981-01-01

    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.

  16. Medical device market in china.

    PubMed

    Boyer, Philip; Morshed, Bashir I; Mussivand, Tofy

    2015-06-01

    With China's growing old-age population and economic presence on the international stage, it has become important to evaluate its domestic and foreign market contribution to medical devices. Medical devices are instruments or apparatuses used in the prevention, rehabilitation, treatment, or knowledge generation with respect to disease or other abnormal conditions. This article provides information drawn from recent publications to describe the current state of the Chinese domestic market for medical devices and to define opportunities for foreign investment potential therein. Recent healthcare reforms implemented to meet rising demand due to an aging and migrating population are having a positive effect on market growth-a global market with a projected growth of 15% per year over the next decade. PMID:25735659

  17. Spintronics technology and device development

    NASA Astrophysics Data System (ADS)

    Ando, Yasuo

    2015-07-01

    Spintronics is an emerging field of research that has made great advances in the last two decades. During this period, various new outstanding spintronics-related phenomena and devices using these phenomena have been proposed. In recent years, the period from the discovery of new spintronics-related materials and phenomena to the development and commercialization of devices using such materials and phenomena has markedly shortened. The importance of understanding the fundamental principles of spintronics has been increasing. In this review, I will first overview the features of spintronics technologies. Then, I will summarize the key technologies applied in the development of spintronic devices and describe their future prospects. This is a translated version of the original paper which appeared in Oyo Buturi 83, 184 (2014) [in Japanese].

  18. Optical to optical interface device

    NASA Technical Reports Server (NTRS)

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

    1972-01-01

    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.

  19. Modeling floating body memory devices

    NASA Astrophysics Data System (ADS)

    Hindupur, Ramya

    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.

  20. Microfluidic devices for cellomics: a review

    Microsoft Academic Search

    Helene Andersson; Albert van den Berg

    2003-01-01

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

  1. Condensate-removal device for heat exchangers

    NASA Technical Reports Server (NTRS)

    Trusch, R. B.; Oconnor, E. W.

    1973-01-01

    Device comprises array of perforated tubes manifolded together and connected to a vacuum suction device. Vacuum applied to these tubes pulls mixture of condensate and effluent gas through perforations and along length of tubes to discharge device. Discharge device may be a separator which separates water vapor from effluent air and allows recirculation of both of them.

  2. Grid enabled data analysis on handheld devices

    Microsoft Academic Search

    Ahsan Ikram; A. Ali; Ashiq Anjum; Canrad Steenberg; Harvey B. Newman; J. J. Bunn; Michael Thomas; T. Azim

    2004-01-01

    The requirement for information on portable, handheld devices demands the realization of increasingly complex applications for increasingly small and ubiquitous devices. This trend promotes the migration of technologies that were originally developed for desktop computers to handheld devices. With the onset of grid computing, users of handheld devices should be able to accomplish much more complex tasks, by accessing the

  3. STRATUS: Assembling Virtual Platforms from Device Clouds

    Microsoft Academic Search

    Minsung Jang; Karsten Schwan

    2011-01-01

    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

  4. Remote physical device fingerprinting Tadayoshi Kohno

    E-print Network

    Kohno, Tadayoshi

    the device's system time is main- tained via NTP or SNTP. One can use our techniques to obtain information about whether two devices on the Inter- net, possibly shifted in time or IP addresses, are actually the number of devices behind a NAT even when the devices use constant or random IP IDs; re- motely probing

  5. Optoelectronic Device Modeling Using Field Simulation Techniques

    Microsoft Academic Search

    Minya Zhang

    1998-01-01

    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

  6. Optoelectronic device modeling using field simulation techniques

    Microsoft Academic Search

    Minya Zhang

    1998-01-01

    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

  7. Developments in AMTEC Devices, Components and Performance

    Microsoft Academic Search

    Margaret A. Ryan; Roger M. Williams; Chutima Saipetch; Adam Kisor; Dennis O'Connor; Mark L. Underwood; Barbara Jeffries-Nakamura

    1994-01-01

    Improvement of the performance of an AMTEC device requires improvement and development of components as well as of device geometry and construction. The research and development effort at JPL includes studies which address both overall device construction and studies of components. This paper discusses recent studies on components and devices which have been carried out at JPL. Components investigated include

  8. Developing new data acquisition devices for COMICS

    Microsoft Academic Search

    Shigeyuki Sako; Hirokazu Kataza; Takashi Miyata; Yoshiko K. Okamoto; Shinya Takubo; Mitsuhiko Honda; Takashi Onaka; Takuya Yamashita

    2003-01-01

    We developed a new data acquisition device for COMICS, a mid infrared instrument of the Subaru telescope. The new device was installed in place of our previous data acquisition device with a lower data transfer speed. The new device is 32 bit PCI bus and PC Linux based and provides bus-master DMA transfer function. It consists of a clock pattern

  9. Protecting health information on mobile devices

    Microsoft Academic Search

    Musheer Ahmed; Mustaque Ahamad

    2012-01-01

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

  10. High Content Cell Screening in a Microfluidic Device*S?

    PubMed Central

    Cheong, Raymond; Wang, Chiaochun Joanne; Levchenko, Andre

    2009-01-01

    A comprehensive, systems level understanding of cell signaling networks requires methods to efficiently assay multiple signaling species, at the level of single cells, responding to a variety of stimulation protocols. Here we describe a microfluidic device that enables quantitative interrogation of signaling networks in thousands of individual cells using immunofluorescence-based readouts. The device is especially useful for measuring the signaling activity of kinases, transcription factors, and/or target genes in a high throughput, high content manner. We demonstrate how the device may be used to measure detailed time courses of signaling responses to one or more soluble stimuli and/or chemical inhibitors as well as responses to a complex temporal pattern of multiple stimuli. Furthermore we show how the throughput and resolution of the device may be exploited in investigating the differences, if any, of signaling at the level of a single cell versus at the level of the population. In particular, we show that NF-?B activity dynamics in individual cells are not asynchronous and instead resemble the dynamics of the population average in contrast to studies of cells overexpressing p65-EGFP. PMID:18953019

  11. A Trusted Portable Computing Device

    NASA Astrophysics Data System (ADS)

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

    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.

  12. Microfluidic device for drug delivery

    NASA Technical Reports Server (NTRS)

    Beebe, David J. (Inventor); MacDonald, Michael J. (Inventor); Eddington, David T. (Inventor); Mensing, Glennys A. (Inventor)

    2010-01-01

    A microfluidic device is provided for delivering a drug to an individual. The microfluidic device includes a body that defines a reservoir for receiving the drug therein. A valve interconnects the reservoir to an output needle that is insertable into the skin of an individual. A pressure source urges the drug from the reservoir toward the needle. The valve is movable between a closed position preventing the flow of the drug from the reservoir to the output needle and an open position allowing for the flow of the drug from the reservoir to the output needle in response to a predetermined condition in the physiological fluids of the individual.

  13. Electromedical devices test laboratories accreditation

    NASA Astrophysics Data System (ADS)

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

    2007-11-01

    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.

  14. Microfluidic Memory and Control Devices

    NASA Astrophysics Data System (ADS)

    Groisman, Alex; Enzelberger, Markus; Quake, Stephen R.

    2003-05-01

    We demonstrate microscopic fluidic control and memory elements through the use of an aqueous viscoelastic polymer solution as a working fluid. By exploiting the fluid's non-Newtonian rheological properties, we were able to demonstrate both a flux stabilizer and a bistable flip-flop memory. These circuit elements are analogous to their solid-state electronic counterparts and could be used as components of control systems for integrated microfluidic devices. Such miniaturized fluidic circuits are insensitive to electromagnetic interference and may also find medical applications for implanted drug-delivery devices.

  15. Beta ray flux measuring device

    DOEpatents

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

    1990-01-01

    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.

  16. A new diagnostic device: KINOX

    NASA Astrophysics Data System (ADS)

    Zaritsky, A. R.; Zaritskaya, G. A.; Pronin, V. S.; Raspopov, N. A.; Fock, M. V.

    2005-08-01

    A new diagnostic device KINOX created at P N Lebedev Physics Institute is described. With this device it is possible to trace the variations of oxygen permeability in erythrocyte membranes during the blood oxygenation. The molecular mechanism responsible for these variations was explained and experimentally tested at P N Lebedev Physics Institute. The diagnostic method is substantiated capable of estimating physiological reserves of organism basing on the results of blood oxygenation measurements performed with the KINOX. The possible reduction in physiological reserves of organism under the laser action on malignant tumor can be detected in this way.

  17. Implantable biomedical devices on bioresorbable substrates

    DOEpatents

    Rogers, John A; Kim, Dae-Hyeong; Omenetto, Fiorenzo; Kaplan, David L; Litt, Brian; Viventi, Jonathan; Huang, Yonggang; Amsden, Jason

    2014-03-04

    Provided herein are implantable biomedical devices, methods of administering implantable biomedical devices, methods of making implantable biomedical devices, and methods of using implantable biomedical devices to actuate a target tissue or sense a parameter associated with the target tissue in a biological environment. Each implantable biomedical device comprises a bioresorbable substrate, an electronic device having a plurality of inorganic semiconductor components supported by the bioresorbable substrate, and a barrier layer encapsulating at least a portion of the inorganic semiconductor components. Upon contact with a biological environment the bioresorbable substrate is at least partially resorbed, thereby establishing conformal contact between the implantable biomedical device and the target tissue in the biological environment.

  18. Lossless hybridization between photovoltaic and thermoelectric devices

    PubMed Central

    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

    2013-01-01

    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). PMID:23820973

  19. A View of the Cardiovascular Device Industry 

    E-print Network

    Cisneros, Daniel Aaron

    2013-04-26

    related to CVD and stroke in the United States. While new medical devices such as Ventricular Assist Devices (VADs) and Cardiac Rhythm Management (CRM) units have improved patient outcomes over the recent past, these devices are certainly not without... As the condition of patients with congestive heart failure worsens, the number of treatment options becomes more limited. In recent years, ventricular assist devices have gained traction, largely improving over first generation devices which featured a large...

  20. Encapsulation methods for organic electrical devices

    DOEpatents

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

    2013-06-18

    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.

  1. Do Mnemonic Devices Lessen Forgetting?

    ERIC Educational Resources Information Center

    Wang, Alvin Y.; And Others

    Assessing the effect of memory improvement strategies upon long-term forgetting, two studies investigated the influence of popular mnemonic devices (the keyword method and the "method of loci") upon forgetting relative to rote rehearsal. The first study (79 subjects) compared the forgetting of French vocabulary words learned either by using the…

  2. Body Implanted Medical Device Communications

    NASA Astrophysics Data System (ADS)

    Yazdandoost, Kamya Yekeh; Kohno, Ryuji

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

  3. Latchup Screening of LSI Devices

    Microsoft Academic Search

    Louis L. Sivo; Fred Rosen; Larry C. Jeffers

    1978-01-01

    An experimental program is outlined which was developed for latchup screening of LSI devices in case the Latchup Analysis Technique cannot be used. The basic approach was to determine the most latchup prone operating conditions experimentally for each LSI type by testing the latchup susceptibilities under hundreds of selected input combinations. The most sensitive conditions are then to be used

  4. ICRF heating on helical devices

    SciTech Connect

    Rasmussen, D.A.; Lyon, J.F.; Hoffman, D.J. [and others

    1995-09-01

    Ion cyclotron range of frequency (ICRF) heating is currently in use on CHS and W7AS and is a major element of the heating planned for steady state helical devices. In helical devices, the lack of a toroidal current eliminates both disruptions and the need for ICRF current drive, simplifying the design of antenna structures as compared to tokamak applications. However the survivability of plasma facing components and steady state cooling issues are directly applicable to tokamak devices. Results from LHD steady state experiments should be available on a time scale to strongly influence the next generation of steady state tokamak experiments. The helical plasma geometry provides challenges not faced with tokamak ICRF heating, including the potential for enhanced fast ion losses, impurity accumulation, limited access for antenna structures, and open magnetic field lines in the plasma edge. The present results and near term plans provide the basis for steady state ICRF heating of larger helical devices. An approach which includes direct electron, mode conversion, ion minority and ion Bernstein wave heating addresses these issues.

  5. Photovoltaic-storage battery device

    Microsoft Academic Search

    M. Ezawa; M. Kumada; A. Misumi; K. Suzuki

    1984-01-01

    A photovoltaic-storage battery device is disclosed, which comprises a substrate having a pair of major surfaces, a photovoltaic element formed on one major surface of the substrate and including a pair of opposing electrodes and a photoelectric film intervening between the pair of opposing electrodes and a storage battery element formed on the other major surface of the substrate and

  6. High performance thermoelectric nanocomposite device

    SciTech Connect

    Yang, Jihui (Lakeshore, CA); Snyder, Dexter D. (Birmingham, MI)

    2011-10-25

    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 average pore diameter ranging from about 4 nm to about 300 nm.

  7. Nitinol medical devices and implants

    Microsoft Academic Search

    D. Stoeckel

    2000-01-01

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

  8. Device Assists Cardiac Chest Compression

    NASA Technical Reports Server (NTRS)

    Eichstadt, Frank T.

    1995-01-01

    Portable device facilitates effective and prolonged cardiac resuscitation by chest compression. Developed originally for use in absence of gravitation, also useful in terrestrial environments and situations (confined spaces, water rescue, medical transport) not conducive to standard manual cardiopulmonary resuscitation (CPR) techniques.

  9. Endoluminal occlusion devices: technology update

    PubMed Central

    Zander, Tobias; Medina, Samantha; Montes, Guillermo; Nuñez-Atahualpa, Lourdes; Valdes, Michel; Maynar, Manuel

    2014-01-01

    Endoluminal occlusion has been performed since the early beginning of interventional radiology. Over recent decades, major technological advances have improved the techniques used and different devices have been developed for changing conditions. Most of these occlusion devices have been implemented in the vascular territory. Early embolization materials included glass particles, hot contrast, paraffin, fibrin, and tissue fragments such as muscle fibers and blood clots; today, occlusion materials include metallic devices, particles, and liquid materials, which can be indicated for proximal or distal occlusion, high-flow and low-flow situations, and in large-caliber and small-caliber vessels, based on need. Technological progress has led to a decreased size of delivery catheters, and an increase in safety due to release systems that permit the withdrawing and replacement of embolization material. Furthermore, bioactive embolization materials have been developed to increase the efficacy of embolization or the biological effect of medication. Finally, materials have been modified for changing indications. Intravascular stents were initially developed to keep an artery open; however, by adding a covering membrane, these stents can be used to occlude the wall of a vessel or other endoluminal structures. This article gives an overview of the devices most utilized for occlusion of endoluminal structures, as well as their major purpose in the endovascular territory. PMID:25489252

  10. Transmyocardial revascularization devices: technology update.

    PubMed

    Kindzelski, Bogdan A; Zhou, Yifu; Horvath, Keith A

    2015-01-01

    Transmyocardial laser revascularization (TMR) emerged as treatment modality for patients with diffuse coronary artery disease not amendable to percutaneous or surgical revascularization. The procedure entails the creation of laser channels within ischemic myocardium in an effort to better perfuse these areas. Currently, two laser devices are approved by the US Food and Drug Administration for TMR - holmium:yttrium-aluminum-garnet and CO2. The two devices differ in regard to energy outputs, wavelengths, ability to synchronize with the heart cycle, and laser-tissue interactions. These differences have led to studies showing different efficacies between the two laser devices. Over 50,000 procedures have been performed worldwide using TMR. Improvements in angina stages, quality of life, and perfusion of the myocardium have been demonstrated with TMR. Although several mechanisms for these improvements have been suggested, evidence points to new blood vessel formation, or angiogenesis, within the treated myocardium, as the major contributory factor. TMR has been used as sole therapy and in combination with coronary artery bypass grafting. Clinical studies have demonstrated that TMR is both safe and effective in angina relief long term. The objective of this review is to present the two approved laser devices and evidence for the safety and efficacy of TMR, along with future directions with this technology. PMID:25565905

  11. Billing Medicare for Medical Devices

    E-print Network

    Nguyen, Danh

    Billing Medicare for Medical Devices Daniel Redline, BA, CCRP, CCRC, Director, Clinical Affairs for Medicare & Medicaid Services (CMS) policies and procedures · Describe the basics of research billing? · Centers for Medicare and Medicaid Services is a federal agency within the United States Department

  12. Smart materials, devices, and structures

    Microsoft Academic Search

    R. M. Satava; S. B. Jones

    1996-01-01

    Smart materials, devices, and structures are familiar staples to the scientific community, researchers, and industry, and in other commercial sectors; however, they are considered futuristic or even magical by most of the medical commu- nity, and in particular by the busy practicing surgeon. There is the need to explore these technologies and to bring to attention not only the availability

  13. Aerosol can waste disposal device

    DOEpatents

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

    1993-01-01

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

  14. In situ biofilm coupon device

    SciTech Connect

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

    1997-01-01

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

  15. In situ biofilm coupon device

    DOEpatents

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

    1997-06-24

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

  16. Tinkertoy Color-Addition Device.

    ERIC Educational Resources Information Center

    Ferguson, Joe L.

    1995-01-01

    Describes construction and use of a simple home-built device, using an overhead projector, for use in demonstrations of the addition of various combinations of red, green, and blue light. Useful in connection with discussions of color, color vision, or color television. (JRH)

  17. Microfluidic Cell-Culture Devices

    Microsoft Academic Search

    Yasuyuki Sakai; Eric Leclerc; Teruo Fujii

    Microfluidics is the emerging technologies that could bring favorable features to tissue engineering applications. Fundamental\\u000a techniques to fabricated microfluidic cell-culture devices and experimental attempts towards in vitro liver tissue reconstitution\\u000a are presented for further discussion on the possible developments in the field of lab-on-a-chip for cellomics.

  18. Device to extrude indium wires

    Microsoft Academic Search

    M. Ece; R. Devito; G. Vidali

    1986-01-01

    A homemade, versatile, low-cost device to extrude indium wire for vacuum seals is described. It has the advantage that no boule of indium has to be made in advance, thereby reducing the amount of poisonous indium vapors, and that wires of different sizes can be made.

  19. Device to extrude indium wires

    NASA Astrophysics Data System (ADS)

    Ece, M.; DeVito, R.; Vidali, G.

    1986-12-01

    A homemade, versatile, low-cost device to extrude indium wire for vacuum seals is described. It has the advantage that no boule of indium has to be made in advance, thereby reducing the amount of poisonous indium vapors, and that wires of different sizes can be made.

  20. Interdigitated photovoltaic power conversion device

    DOEpatents

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

    1999-04-27

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