Science.gov

Sample records for 11th power watt

  1. 500-WATT FUEL-CELL POWER PLANT.

    DTIC Science & Technology

    hydrogen and air, fuel - cell power plant. Two independent units are to be developed - a hydrogen-generator assembly and a fuel - cell assembly. The...hydrogen-generator assembly will convert the hydrocarbon fuel to hydrogen by steam reforming, and the fuel - cell assembly will electrochemically oxidize the...The report presents the technical approach to be used to establish the feasibility of a compact 500-watt, liquid-hydrocarbon and air, fuel - cell power

  2. Watts Up? Pro AC Power Meter for Automated Energy Recording

    PubMed Central

    Hirst, Jason M.; Miller, Jonathan R.; Kaplan, Brent A.; Reed, Derek D.

    2013-01-01

    The purpose of the present paper is to review the Watts up? Pro AC power meter. Evaluations of the meter's reliability for measuring energy consumption by consumer electronics yielded acceptable levels of reliability. Implications and limitations for the use of this product in behavior analytic research and practice are discussed.

  3. Green Power Marketing in the United States. A Status Report (11th Edition)

    SciTech Connect

    Bird, Lori; Kreycik, Claire; Friedman, Barry

    2008-10-01

    This report documents green power marketing activities and trends in the United States. It presents aggregate green power sales data for all voluntary purchase markets across the United States. It also provides summary data on utility green pricing programs offered in regulated electricity markets and green power marketing activity in competitive electricity markets, as well as green power sold to voluntary purchasers in the form of renewable energy certificates. Key market trends and issues are also discussed.

  4. Green Power Marketing in the United States: A Status Report (11th Edition)

    SciTech Connect

    Bird, L.; Kreycik, C.; Friedman, B.

    2008-10-01

    This report documents green power marketing activities and trends in the United States. It presents aggregate green power sales data for all voluntary purchase markets across the United States. It also provides summary data on utility green pricing programs offered in regulated electricity markets and green power marketing activity in competitive electricity markets, as well as green power sold to voluntary purchasers in the form of renewable energy certificates. Key market trends and issues are also discussed.

  5. The 11th Topical Conference on Radio frequency Power in Plasmas. Proceedings

    SciTech Connect

    Prater, R.; Chan, V.S.

    1996-03-01

    The Eleventh Topical Conference on Radio Frequency Power in Plasmas was held in Palm Springs, California under the sponsorship of General Atomics and the American Physical Society. These proceedings represent the papers presented at the Conference. The topics discussed included mode conversion heating and current drive experiments in TFTR, the coupling of high ICRF power in JT{minus}60U(through a 15 cm gap between the antenna and the plasma) as required for ITER, and the H{minus}mode in ASDEX{minus}U, antenna design and technology was discussed in some detail as well as the interaction of plasmas and radio frequency waves for fusion and non{minus}fusion applications. There are 102 papers published in the proceedings and 101 have been abstracted for the Energy Science and Technology database.(AIP)

  6. Watt-level wireless power transmission to multiple compact receivers

    NASA Astrophysics Data System (ADS)

    Garraud, A.; Munzer, D. J.; Althar, M.; Garraud, N.; Arnold, D. P.

    2015-12-01

    This paper reports an electrodynamic wireless power transmission (EWPT) system using a low-frequency (300 Hz) magnetic field to transmit watt-scale power levels to multiple compact receivers. As compared to inductively or resonantly coupled coils, EWPT facilitates transmission to multiple non-interacting receivers with little restriction on their orientation. A single 3.0 cm3 receiver achieves 1.25 W power transmission with 8% efficiency at a distance of 1 cm (350 mW/cm3 power density) from the transmitter. The same prototype achieves 9 mW at a distance of 9 cm. Moreover, we demonstrate simultaneous recharge of two wearable devices, using two receivers located in arbitrary positions and orientations.

  7. 500-Watt Solid-State RF Power Amplifier AM-7209( )/VRC.

    DTIC Science & Technology

    1983-03-18

    nocoe y and td&tIl#)Y by blocki numiber) VHF RF Amplifiers 30 - 88 MHz Switching Power Supplies Power Amplifier li Freauency HoODing 20 ABSTRACT eCeIIIDI... switch which permits selection of either the full 500-watt nominal output or a reduced 250-watt level and a display control switch . The amplifier...AMPLIFIER SPECIFICATIONS The following specifications describe the 500-watt VHF power amplifier. OPERATOR CONTROLS POWER SWITCH Turns on primary power to the

  8. 500 Watt Diesel Fueled TPV Portable Power Supply

    NASA Astrophysics Data System (ADS)

    Horne, W. E.; Morgan, M. D.; Sundaram, V. S.; Butcher, T.

    2003-01-01

    A test-bed 500 watt diesel fueled thermophotovoltaic (TPV) portable power supply is described. The goal of the design is a compact, rugged field portable unit weighing less than 15 pounds without fuel. The conversion efficiency goal is set at 15% fuel energy to electric energy delivered to an external load at 24 volts. A burner/recuperator system has been developed to meet the objectives of high combustion air preheat temperatures with a compact heat exchanger, low excess air operation, and high convective heat transfer rates to the silicon carbide emitter surface. The burner incorporates a air blast atomizer with 100% of the combustion air passing through the nozzle. Designed firing rate of 2900 watts at 0.07 gallons of oil per hour. This incorporates a single air supply dc motor/fan set and avoids the need for a system air compressor. The recuperator consists of three annular, concentric laminar flow passages. Heat from the combustion of the diesel fuel is both radiantly and convectively coupled to the inside wall of a cylindrical silicon carbide emitter. The outer wall of the emitter then radiates blackbody energy at the design temperature of 1400°C. The cylindrical emitter is enclosed in a quartz envelope that separates it from the photovoltaic (PV) cells. Spectral control is accomplished by a resonant mesh IR band-pass filter placed between the emitter and the PV array. The narrow band of energy transmitted by the filter is intercepted and converted to electricity by an array of GaSb PV cells. The array consists of 216 1-cm × 1-cm GaSb cells arranged into series and parallel arrays. An array of heat pipes couple the PV cell arrays to a heat exchanger which is cooled by forced air convection. A brief status of the key TPV technologies is presented followed by data characterizing the performance of the 500 watt TPV system.

  9. Small Stirling dynamic isotope power system for multihundred-watt robotic missions

    NASA Technical Reports Server (NTRS)

    Bents, David J.

    1991-01-01

    Free Piston Stirling Engine (FPSE) and linear alternator (LA) technology is combined with radioisotope heat sources to produce a compact dynamic isotope power system (DIPS) suitable for multihundred watt space application which appears competitive with advance radioisotope thermoelectric generators (RTGs). The small Stirling DIPS is scalable to multihundred watt power levels or lower. The FPSE/LA is a high efficiency convertor in sizes ranging from tens of kilowatts down to only a few watts. At multihundred watt unit size, the FPSE can be directly integrated with the General Purpose Heat Source (GPHS) via radiative coupling; the resulting dynamic isotope power system has a size and weight that compares favorably with the advanced modular (Mod) RTG, but requires less than a third the amount of isotope fuel. Thus the FPSE extends the high efficiency advantage of dynamic systems into a power range never previously considered competitive for DIPS. This results in lower fuel cost and reduced radiological hazard per delivered electrical watt.

  10. Small Stirling dynamic isotope power system for multihundred-watt robotic missions

    NASA Technical Reports Server (NTRS)

    Bents, David J.

    1991-01-01

    Free piston Stirling Engine (FPSE) and linear alternator (LA) technology is combined with radioisotope heat sources to produce a compact dynamic isotope power system (DIPS) suitable for multihundred watt space application which appears competitive with advanced radioisotope thermoelectric generators (RTGs). The small Stirling DIPS is scalable to multihundred watt power levels or lower. The FPSE/LA is a high efficiency convertor in sizes ranging from tens of kilowatts down to only a few watts. At multihundred watt unit size, the FPSE can be directly integrated with the General Purpose Heat Source (GPHS) via radiative coupling; the resulting dynamic isotope power system has a size and weight that compares favorably with the advanced modular (Mod) RTG, but requires less than a third the amount of isotope fuel. Thus the FPSE extends the high efficiency advantage of dynamic systems into a power range never previously considered competitive for DIPS. This results in lower fuel cost and reduced radiological hazard per delivered electrical watt.

  11. Two-watt radioisotope power generators for underwater applications

    NASA Technical Reports Server (NTRS)

    Caputo, R. S.; Truscello, V. C.

    1974-01-01

    Materials and design considerations are discussed for a low-cost, reliable radio-isotope-fueled thermoelectric generator for use in an undersea application. Plutonium has been selected as fuel, and the generator has to meet design goals of 2 watts after 20 years with a direct output voltage of 6-8 volts. The pressed and sintered form of Bi2Te3 appears to be the most appropriate thermoelectric material. Both fibrous and multilayer foil insulation could be used with proper processing and quality control, but there is less risk with fibrous type insulation. Min-K 1400 is recommended with a nitrogen cover gas. The heat source recommended is a three-layer capsule using T-111 for both the liner and strength member with an outer liner of Hastelloy-C.

  12. EDITORIAL: Selected papers from the 11th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2011) Selected papers from the 11th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2011)

    NASA Astrophysics Data System (ADS)

    Cho, Young-Ho

    2012-09-01

    This special section of Journal of Micromechanics and Microengineering features papers selected from the 11th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2011), held at Sejong Hotel in Seoul, Korea during 15-18 November 2011. Since the first PowerMEMS workshop held in Sendai, Japan in 2000, the workshop has developed as the premier forum for reporting research results in micro and nanotechnology for power generation, energy conversion, harvesting and processing applications, including in-depth technical issues on nanostructures and materials for small-scale high-density energy and thermal management. Potential PowerMEMS applications cover not only portable power devices for consumer electronics and remote sensors, but also micro engines, impulsive thrusters and fuel cells for systems ranging from the nanometer to the millimeter scale. The 2011 technical program consists of 1 plenary talk, 4 invited talks and 118 contributed presentations. The 48 oral and 70 poster presentations, selected by 27 Technical Program Committee Members from 131 submitted abstracts, have stimulated lively discussion maximizing the interaction between participants. Among them, this special section includes 9 papers covering micro-scale power generators, energy converters, harvesters, thrusters and thermal coolers. Finally, we are grateful to the members of the International Steering Committee, the Technical Program Committee, and the Local Organizing Committee for their efforts and contributions to PowerMEMS 2011. We also thank the two companies Samsung Electro-Mechanics and LG Elite for technical tour arrangements. Special thanks go to Dr Ian Forbes, the editorial staff of the Journal of Micromechanics and Microengineering, as well as to the staff of IOP Publishing for making this special section possible.

  13. Design point characteristics of a 500 - 2500 watt isotope-Brayton power system

    NASA Technical Reports Server (NTRS)

    Barna, G. J.

    1972-01-01

    An analytical study was conducted to investigate the potential performance characteristics of an isotope-Brayton space power system at electric power levels from 500 - 2500 watts. Utilization of the Pu(238) heat source, or capsule, was assumed. A single-loop system design concept was selected. The design concept and results of first-order trade-off studies of the effects of major system parameters on system performance are presented. Results of the study indicate the potential for high system efficiency and high specific power over the entire power range.

  14. Design point characteristics of a 500 - 2500 watt isotope-Brayton power system.

    NASA Technical Reports Server (NTRS)

    Barna, G. J.

    1972-01-01

    An analytical study was conducted to investigate the potential performance characteristics of an isotope-Brayton space power system at electric power levels from 500 to 2500 W. Utilization of the Pu 238 heat source, or capsule, being developed for the Multi-Hundred Watt Radioisotope Thermoelectric Generator was assumed. A single-loop system design concept was selected. The design concept and results of first-order tradeoff studies of the effects of major system parameters on system performance are presented. Results of the study indicate the potential for high system efficiency and high specific power over the entire power range.

  15. Effectiveness of SO2 emission control policy on power plants in the Yangtze River Delta, China-post-assessment of the 11th Five-Year Plan.

    PubMed

    Tan, Jiani; Fu, Joshua S; Huang, Kan; Yang, Cheng-En; Zhuang, Guoshun; Sun, Jian

    2017-02-03

    Facing the air pollution problems in China, emission control strategies have been implemented within the framework of national Five-Year Plan (FYP). According to the lack of post-assessment studies in the literature, this study assessed the effectiveness of the SO2 emission control policies on power plants after the 11th FYP (2006-2010) by modeling emission control scenarios. The idealized emission control policy (the PS90 scenario with assumption of 90% SO2 emission reduction from power plants) could reduce the SO2 and SO4(2-) concentrations by about 51 and 14%, respectively, over the Yangtze River Delta region. While the actual emission control condition (the P2010 scenario based on the actual emissions from power plants in 2010) demonstrated that the actual reduction benefits were 30% of SO2 and 9% of SO4(2-). On the city scale, the P2010 scenario imposed positive benefits on Shanghai, Nanjing, Nantong, and Hangzhou with SO2 reductions of about 55, 12, 30, and 21%, respectively, while an 11% increase of SO2 concentration was found in Ningbo. The number of days exceeding China's National Ambient Air Quality Standard of Class I daily SO2 concentration was estimated to be 75, 52, 7, 77, and 40 days for Shanghai, Nanjing, Nantong, Ningbo, and Hangzhou under the real SO2 control condition (P2010). The numbers could be decreased by 16, 11, 2, 21, and 11% if the control effect reaches the level of the PS90 scenario. This study serves as a scientific basis to design capable enforcement of emission control strategies in China in the future national plans.

  16. Isotope Brayton electric power system for the 500 to 2500 watt range.

    NASA Technical Reports Server (NTRS)

    Macosko, R. P.; Barna, G. J.; Block, H. B.; Ingle, B. D.

    1972-01-01

    An extensive study was conducted at the Lewis Research Center to evaluate an isotope Brayton electric power system for use in the 500 to 2500 W power range. The study emphasized overall system simplicity in order to reduce parasitic power losses and improve system reliability. The study included detailed parametric cycle analysis, conceptual component designs, and evaluation of system packaging. The study has resulted in the selection of a single-loop system (gas) with six major components including one rotating unit. Calculated net system efficiency varies from 23 to 28% over the power range. The use of the Pu-238 heat source being developed for the Multi-Hundred-Watt Radioisotope Thermoelectric Generator program was assumed.

  17. A 1 watt GaAs power amplifier for the NASA 30/20 GHz communication system

    NASA Technical Reports Server (NTRS)

    Goel, J.; Oransky, G.; Yuan, S.; Osullivan, P.; Burch, J.

    1982-01-01

    A multistage GaAs FET power amplifier, employing cascaded balanced stages using state-of-the-art 1/4, 1/2, and 1 watt devices, has been developed. A linear gain of 30 dB with 1.25 watts output has been achieved over a 17.7 to 19.4 GHz frequency band. The development and performance of the amplifier and its components are discussed.

  18. Watt-class high-power, high-beam-quality photonic-crystal lasers

    NASA Astrophysics Data System (ADS)

    Hirose, Kazuyoshi; Liang, Yong; Kurosaka, Yoshitaka; Watanabe, Akiyoshi; Sugiyama, Takahiro; Noda, Susumu

    2014-05-01

    The applications of surface-emitting lasers, in particular vertical-cavity surface-emitting lasers (VCSELs), are currently being extended to various low-power fields including communications and interconnections. However, the fundamental difficulties in increasing their output power by more than several milliwatts while maintaining single-mode operation prevent their application in high-power fields such as material processing, laser medicine and nonlinear optics, despite their advantageous properties of circular beams, the absence of catastrophic optical damage, and their suitability for two-dimensional integration. Here, we demonstrate watt-class high-power, single-mode operation by a two-dimensional photonic-crystal surface-emitting laser under room-temperature, continuous-wave conditions. The two-dimensional band-edge resonant effect of a photonic crystal formed by metal-organic chemical vapour deposition enables a 1,000 times broader coherent-oscillation area, which results in a high beam quality of M2 <= 1.1, narrowing the focus spot by two orders of magnitude compared to VCSELs. Our demonstration promises to realize innovative high-power applications for surface-emitting lasers.

  19. Narrow linewidth picosecond UV pulsed laser with mega-watt peak power.

    PubMed

    Huang, Chunning; Deibele, Craig; Liu, Yun

    2013-04-08

    We demonstrate a master oscillator power amplifier (MOPA) burst mode laser system that generates 66 ps/402.5 MHz pulses with mega-watt peak power at 355 nm. The seed laser consists of a single frequency fiber laser (linewidth < 5 KHz), a high bandwidth electro-optic modulator (EOM), a picosecond pulse generator, and a fiber based preamplifier. A very high extinction ratio (45 dB) has been achieved by using an adaptive bias control of the EOM. The multi-stage Nd:YAG amplifier system allows a uniformly temporal shaping of the macropulse with a tunable pulse duration. The light output from the amplifier is converted to 355 nm, and over 1 MW peak power is obtained when the laser is operating in a 5-μs/10-Hz macropulse mode. The laser output has a transform-limited spectrum with a very narrow linewidth of individual longitudinal modes. The immediate application of the laser system is the laser-assisted hydrogen ion beam stripping for the Spallation Neutron Source (SNS).

  20. Watts Bar Unit 1 Cycle Zero Power Physics Tests Analysis with VERA-CS

    SciTech Connect

    Gehin, Jess C; Godfrey, Andrew T; Evans, Thomas M; Hamilton, Steven P; Francheschini, F.

    2014-01-01

    The Consortium for Advanced Simulation of Light Water Reactors (CASL) is developing a collection of methods and software products known as VERA, the Virtual Environment for Reactor Applications, including a core simulation capability called VERA-CS. A key milestone for this endeavor is to validate VERA against measurements from operating nuclear power reactors. The first step in validation against plant data is to determine the ability of VERA to accurately simulate the initial startup physics tests for Watts Bar Nuclear Power Station, Unit 1 (WBN1) cycle 1. VERA-CS calculations were performed with the Insilico code developed at ORNL using cross section processing from the SCALE system and the transport capabilities within the Denovo transport code using the SPN method. The calculations were performed with ENDF/B-VII.0 cross sections in 252 groups (collapsed to 23 groups for the 3D transport solution). The key results of the comparison of calculations with measurements include initial criticality, control rod worth critical configurations, control rod worth, differential boron worth, and isothermal temperature reactivity coefficient (ITC). The VERA results for these parameters show good agreement with measurements, with the exception of the ITC, which requires additional investigation. Results are also compared to those obtained with Monte Carlo methods and a current industry core simulator.

  1. Development and Demonstration of a 25 Watt Thermophotovoltaic Power Source for a Hybrid Power System

    NASA Technical Reports Server (NTRS)

    Doyle, Edward; Shukla, Kailash; Metcalfe, Christopher

    2001-01-01

    The development of a propane-fueled, 25 W thermophotovoltaic (TPV) power source for use in a hybrid power system is described. The TPV power source uses a platinum emitting surface with an anti-reflective coating to radiate to gallium antimonide photocells, which converts the radiation to electric power. The development program started with the design and fabrication of an engineering prototype system. This was used as a component development vehicle to develop the technologies for the various components. A 25 W demonstration prototype was then designed and fabricated using the most advanced component approaches. The designs and test results from this development program are discussed.

  2. A new Cu(TiBN x ) alloy film for boosting the per-watt illuminance of high power LEDs

    NASA Astrophysics Data System (ADS)

    Lin, Chon-Hsin

    2017-01-01

    In this study, a new Cu(TiBN x ) alloy film has been explored and utilized as a flexible heat dissipation layer for the substrate of high power LEDs to boost their per-watt illuminance by reducing the thermal resistance and increasing the thermal conductivity of the substrate. The new film is a Cu-alloy seed layer fabricated by co-sputtering Cu and TiB in an N2 atmosphere on a Ta/polyimide (Ta/PI) substrate. The film was then annealed at 340 °C for 1 h without noticeable Cu oxide formation around the film-substrate interface. The new film exhibits low resistivity, high thermal conductivity and low thermal resistance, rendering a substantially higher per-watt illuminance for LEDs that utilize the film as their additional heat dissipation layer. The experimental results gained in the study appear to confirm the new Cu(TiBN x ) film as a good candidate material, at least, for boosting the per-watt illuminance of high power LEDs.

  3. Nuclear Science Symposium, 26th and Symposium on Nuclear Power Systems, 11th, San Francisco, Calif., October 17-19, 1979, Proceedings

    NASA Technical Reports Server (NTRS)

    Kerns, C. R.

    1980-01-01

    The paper covers the studies presented on nuclear science and nuclear power systems symposiums. The studies deal with nuclear radiation detectors, nuclear circuits and systems, space and medical instrumentation, as well as with environmental and reactor instrumentation. Data preprocessing and acquisition are discussed. Emphasis is placed on the engineered safety features of nuclear systems.

  4. Difference between the maximum empirical and field measured peak Watt values of thermal power system under highly sufficient solar conditions

    NASA Astrophysics Data System (ADS)

    Elhussain, O. A.; Abdel-Magid, T. I. M.

    2016-08-01

    Mono-Crystalline solar cell module is experimentally conducted in Khartoum, Sudan to study the difference between maximum empirical value of peak Watt and maximum value of thermal power produced in field under highly sufficient solar conditions. Field measurements are recorded for incident solar radiation, produced voltage, current and temperature at several time intervals during sun shine period. The thermal power system has been calculated using fundamental principles of heat transfer. The study shows that solar power for considered module could not attain the empirical peak power irrespective to maximum value of direct incident solar radiation and maximum temperature gained. A loss of about 6% of power can be considered as the difference between field measurements and the manufacturer's indicated empirical value. Solar cell exhibits 94% efficiency in comparison with manufacturer's provided data, and is 3'% more efficient in thermal energy production than in electrical power extraction for hot-dry climate conditions.

  5. How Did September 11th Affect Students?

    ERIC Educational Resources Information Center

    Lange, Nancy

    2002-01-01

    There has been much speculation about how terrorist attacks on September 11th affected everyone, including students on college campuses. At Michigan State University, the assistant director of residence life assessment, research and technology decided to investigate. This article presents results of her department's survey. (Author)

  6. 11th Annual Legislative Summit, 2008

    ERIC Educational Resources Information Center

    National Indian Education Association, 2008

    2008-01-01

    Several papers were presented during the 11th Annual National Indian Education Association (NIEA) Legislative Summit. This volume contains the following briefing papers presented during the summit: (1) Reauthorization of No Child Left Behind Strengthen Native American Education; (2) The Johnson O'Malley Program; (3) Legislation to Address…

  7. Section 619 Profile. 11th Edition.

    ERIC Educational Resources Information Center

    Danaher, Joan, Ed.; Kraus, Robert, Ed.

    The 11th edition of the Section 619 Profile describes services provided under the Preschool Grants Program for Children with Disabilities (Section 619 of Part B) of the Individuals with Disabilities Education Act (IDEA). It presents current and/or historical information for all 50 states, the District of Columbia and Puerto Rico, which are all…

  8. Proceedings: EPRI 11th Annual NDE Issues Meeting

    SciTech Connect

    2001-10-01

    For the past 10 years, EPRI has transferred research and applications solutions to its subscribing members during this annual event. At this meeting, members are invited to provide important feedback on emergent issues, solutions needed, and desired direction of the EPRI Nondestructive Evaluation (NDE) Center. The 11th Annual NDE Issues Meeting was held July 16-18, 2001, in Toronto, Ontario, Canada, and was hosted by Ontario Power Generation.

  9. On-chip power-combining techniques for watt-level linear power amplifiers in 0.18 μm CMOS

    NASA Astrophysics Data System (ADS)

    Zhixiong, Ren; Kefeng, Zhang; Lanqi, Liu; Cong, Li; Xiaofei, Chen; Dongsheng, Liu; Zhenglin, Liu; Xuecheng, Zou

    2015-09-01

    Three linear CMOS power amplifiers (PAs) with high output power (more than watt-level output power) for high data-rate mobile applications are introduced. To realize watt-level output power, there are two 2.4 GHz PAs using an on-chip parallel combining transformer (PCT) and one 1.95 GHz PA using an on-chip series combining transformer (SCT) to combine output signals of multiple power stages. Furthermore, some linearization techniques including adaptive bias, diode linearizer, multi-gated transistors (MGTR) and the second harmonic control are applied in these PAs. Using the proposed power combiner, these three PAs are designed and fabricated in TSMC 0.18 μm RFCMOS process. According to the measurement results, the proposed two linear 2.4 GHz PAs achieve a gain of 33.2 dB and 34.3 dB, a maximum output power of 30.7 dBm and 29.4 dBm, with 29% and 31.3% of peak PAE, respectively. According to the simulation results, the presented linear 1.95 GHz PA achieves a gain of 37.5 dB, a maximum output power of 34.3 dBm with 36.3% of peak PAE. Project supported by the National Natural Science Foundation of China (No. 61076030).

  10. Sub-100 fs pulses at watt-level powers from a dissipative-soliton fiber laser

    PubMed Central

    Kieu, K.; Renninger, W. H.; Chong, A.; Wise, F. W.

    2011-01-01

    We report a mode-locked fiber laser that exploits dissipative-soliton pulse shaping along with cladding pumping for high average power. The laser generates 31 nJ chirped pulses at 70 MHz repetition rate, for an average power of 2.2 W. After dechirping outside the laser, 80 fs pulses, with 200 kW peak power, are obtained. PMID:19252562

  11. Multi-Watt femtosecond optical parametric master oscillator power amplifier at 43 MHz.

    PubMed

    Mörz, Florian; Steinle, Tobias; Steinmann, Andy; Giessen, Harald

    2015-09-07

    We present a high repetition rate mid-infrared optical parametric master oscillator power amplifier (MOPA) scheme, which is tunable from 1370 to 4120nm. Up to 4.3W average output power are generated at 1370nm, corresponding to a photon conversion efficiency of 78%. Bandwidths of 6 to 12nm with pulse durations between 250 and 400fs have been measured. Strong conversion saturation over the whole signal range is observed, resulting in excellent power stability. The system consists of a fiber-feedback optical parametric oscillator that seeds an optical parametric power amplifier. Both systems are pumped by the same Yb:KGW femtosecond oscillator.

  12. Isotope Brayton electric power system for the 500 to 2500 watt range

    NASA Technical Reports Server (NTRS)

    Macosko, R. P.; Barna, G. J.; Block, H. B.; Ingle, B. D.

    1972-01-01

    An extensive study was conducted at the Lewis Research Center to evaluate an isotope Brayton electric power system for use in the 500 to 2500 W power range. Overall system simplicity was emphasized in order to reduce parasitic power losses and improve system reliability. Detailed parametric cycle analysis, conceptual component designs, and evaluation of system packaging were included. A single-loop system (gas) with six major components including one rotating unit was selected. Calculated net system efficiency varies from 23 to 28 percent over the power range.

  13. Powering a Home with Just 25 Watts of Solar PV. Super-Efficient Appliances Can Enable Expanded Off-Grid Energy Service Using Small Solar Power Systems

    SciTech Connect

    Phadke, Amol A.; Jacobson, Arne; Park, Won Young; Lee, Ga Rick; Alstone, Peter; Khare, Amit

    2015-04-01

    Highly efficient direct current (DC) appliances have the potential to dramatically increase the affordability of off-grid solar power systems used for rural electrification in developing countries by reducing the size of the systems required. For example, the combined power requirement of a highly efficient color TV, four DC light emitting diode (LED) lamps, a mobile phone charger, and a radio is approximately 18 watts and can be supported by a small solar power system (at 27 watts peak, Wp). Price declines and efficiency advances in LED technology are already enabling rapidly increased use of small off-grid lighting systems in Africa and Asia. Similar progress is also possible for larger household-scale solar home systems that power appliances such as lights, TVs, fans, radios, and mobile phones. When super-efficient appliances are used, the total cost of solar home systems and their associated appliances can be reduced by as much as 50%. The results vary according to the appliances used with the system. These findings have critical relevance for efforts to provide modern energy services to the 1.2 billion people worldwide without access to the electrical grid and one billion more with unreliable access. However, policy and market support are needed to realize rapid adoption of super-efficient appliances.

  14. 500-Watt Solid-State RF Power Amplifier AM-7209( )/VRC.

    DTIC Science & Technology

    1983-03-18

    Amplifier Frequency Hopping 20 ADSTRACT fContinu an revtee aide If nee eary and identify by block number) I Progress in amplifier module circuit design...Rectifiers 45 2.6.1.1.5 Output Capacitors 45 2.6.1.1.6 Snubber Networks 47 2.6.1.1.7 Regulator Loop/Control Circuits 49 2.6.1.2 Control Circuit Power...Supply 51 2.6.1.3 Loop Considerations 53 2.6.1.3.1 RF Amplifier Power Supply 53 2.6.1.3.2 Control Circuit Power Supply 62 2.6.2 EMI Filter Design 71

  15. 11th International Conference on Atmospheric Electricity

    NASA Technical Reports Server (NTRS)

    Christian, H. J. (Compiler)

    1999-01-01

    This document contains the proceedings from the 11th International Conference on Atmospheric Electricity (ICAE 99), held June 7-11, 1999. This conference was attended by scientists and researchers from around the world. The subjects covered included natural and artificially initiated lightning, lightning in the middle and upper atmosphere (sprites and jets), lightning protection and safety, lightning detection techniques (ground, airborne, and space-based), storm physics, electric fields near and within thunderstorms, storm electrification, atmospheric ions and chemistry, shumann resonances, satellite observations of lightning, global electrical processes, fair weather electricity, and instrumentation.

  16. Researching new EUV pellicle films for source powers beyond 250 watts

    NASA Astrophysics Data System (ADS)

    Nasalevich, Maxim; van Zwol, Pieter Jan; Abegg, Erik; Voorthuijzen, Pim; Vles, David; Péter, Mária; van der Zande, Wim; Vermeulen, Hans

    2016-10-01

    In order to deploy EUV lithography as a high volume manufacturing technology an extreme control of reticle defectivity is required. Systematic defect printing is unaffordable. A potential solution being investigated for meeting the EUV reticle contamination control requirements is to utilize a suspended thin membrane (pellicle) mounted at a fixed distance in front of the reticle as a physical barrier against particles. Pellicles of the aspect ratios relevant for the scanner ( 11x14 cm2, 50 nm) that are based on polycrystalline silicon were produced and successful imaging runs were carried out. Investigations of pellicles using different materials continue to ensure having membranes capable of withstanding future high EUV source powers and to ensure larger EUV transmission values. The ideal requirements of the pellicle are: (i) maximum EUV transmission ideally above 90% single pass, (ii) chemical stability and (iii) thermo-mechanical resistance under EUV/H2. Since fulfilling all the requirements in one single layer is a challenge, different layer film architectures are proposed. This paper discusses such architectures, both silicon- and carbon-based. The base materials are complemented by nanometre thin coatings that increase IR absorption and thus enhance emissivity and that prevents oxidation of the base material occurring in high power EUV systems.

  17. Hundred-watt-level high power random distributed feedback Raman fiber laser at 1150 nm and its application in mid-infrared laser generation.

    PubMed

    Zhang, Hanwei; Zhou, Pu; Wang, Xiong; Du, Xueyuan; Xiao, Hu; Xu, Xiaojun

    2015-06-29

    Two kinds of hundred-watt-level random distributed feedback Raman fiber have been demonstrated. The optical efficiency can reach to as high as 84.8%. The reported power and efficiency of the random laser is the highest one as we know. We have also demonstrated that the developed random laser can be further used to pump a Ho-doped fiber laser for mid-infrared laser generation. Finally, 23 W 2050 nm laser is achieved. The presented laser can obtain high power output efficiently and conveniently and opens a new direction for high power laser sources at designed wavelength.

  18. 11th International Congress of Endocrinology.

    PubMed

    Fuller, P J

    2001-03-01

    The Olympics of endocrinology, the 11th International Congress of Endocrinolgy was held rather appropriately in Sydney, four weeks after the summer games of the XXWIIth Modern Olympiad. Both occasions were a great success and whilst it may be tempting to extend the analogy to the pool or the track or heaven forbid, digress into 'drugs in sport', this review will focus on endocrinology. There were over 3000 participants with ten plenary lectures, 20 meet-the-expert sessions, 41 symposia, 128 oral free communications and 1500 posters. Sydney post-Olympics provided a vibrant, exciting and picturesque setting with outstanding convention facilities. The Congress Party was held at Campbells Cove in the lee of the Harbour Bridge looking toward the Opera House which provided an opportunity for delegates to view the two architectural icons that had become so familiar in the preceding months. Credit must be given both to the Local Organising Committee of Sydney endocrinologists who made it all happen and to the International Program Organising Committee who crafted a pageant of first rate endocrinology. It is self-evident that this report can only hope to give the reader a flavour of a Congress such as this with the choice of topics being largely idiosyncratic. With five concurrent symposia and two concurrent orals each morning and afternoon of the four days, any omissions reflect not on the topic or its importance but on this reviewer's inability to be in more than one place at once!

  19. NORTH GATE AT 11TH AVENUE (490 NORTH & 900 EAST), ...

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

    NORTH GATE AT 11TH AVENUE (490 NORTH & 900 EAST), SALT LAKE CITY, UT. VIEW LOOKING SOUTH AT CEMETERY'S NORTH GATE (WPA PROJECT, 1938-1941). - Salt Lake City Cemetery, 200 N Street, Salt Lake City, Salt Lake County, UT

  20. Experimental study on an S-band near-field microwave magnetron power transmission system on hundred-watt level

    NASA Astrophysics Data System (ADS)

    Zhang, Biao; Jiang, Wan; Yang, Yang; Yu, Chengyang; Huang, Kama; Liu, Changjun

    2015-11-01

    A multi-magnetron microwave source, a metamaterial transmitting antenna, and a large power rectenna array are presented to build a near-field 2.45 GHz microwave power transmission system. The square 1 m2 rectenna array consists of sixteen rectennas with 2048 Schottky diodes for large power microwave rectifying. It receives microwave power and converts them into DC power. The design, structure, and measured performance of a unit rectenna as well as the entail rectenna array are presented in detail. The multi-magnetron microwave power source switches between half and full output power levels, i.e. the half-wave and full-wave modes. The transmission antenna is formed by a double-layer metallic hole array, which is applied to combine the output power of each magnetron. The rectenna array DC output power reaches 67.3 W on a 1.2 Ω DC load at a distance of 5.5 m from the transmission antenna. DC output power is affected by the distance, DC load, and the mode of microwave power source. It shows that conventional low power Schottky diodes can be applied to a microwave power transmission system with simple magnetrons to realise large power microwave rectifying.

  1. September 11th Survivors and the Refugee Model.

    ERIC Educational Resources Information Center

    Myer, Rick A.; Moore, Holly; Hughes, Tammy L.

    2003-01-01

    This article compares the experience of people working in the area of the World Trade Centers on September 11th to the experience of refugees. Positive and negative aspects of diagnosing victims of disasters are discussed both in general and specifically related to post-traumatic stress disorder. Information regarding the refugee experience is…

  2. Islamophobia Pre- and Post-September 11th, 2001

    ERIC Educational Resources Information Center

    Sheridan, Lorraine P.

    2006-01-01

    Although much academic research has addressed racism, religious discrimination has been largely ignored. The current study investigates levels of self reported racial and religious discrimination in a sample of 222 British Muslims. Respondents indicate that following September 11th, 2001, levels of implicit or indirect discrimination rose by 82.6%…

  3. Loss of power output and laser fibre degradation during 120 watt lithium-triborate HPS laser vaporisation of the prostate

    NASA Astrophysics Data System (ADS)

    Hermanns, Thomas; Sulser, Tullio; Hefermehl, Lukas J.; Strebel, Daniel; Michel, Maurice-Stephan; Müntener, Michael; Meier, Alexander H.; Seifert, Hans-Helge

    2009-02-01

    It has recently been shown that laser fibre deterioration leads to a significant decrease of power output during 80 W potassium titanyl phosphate (KTP) laser vaporisation (LV) of the prostate. This decrease results in inefficient vaporisation especially towards the end of the procedure. For the new 120 W lithium-triborate (LBO) High Performance System (HPS) laser not only higher power but also changes in beam characteristics and improved fibre quality have been advertised. However, high laser power has been identified as a risk factor for laser fibre degradation. Between July and September 2008 25 laser fibres were investigated during routine 120 W LBO-LV in 20 consecutive patients. Laser beam power was measured at baseline and after the application of every 25 kJ during the LV procedure. Postoperatively, the surgeon subjectively rated the performance of the respective fibre on a scale from 1 to 4 (1 indicating perfect and 4 insufficient performance). Additionally, microscopic examination of the fibre tip was performed. Median energy applied was 212 kJ. Changes of power output were similar for all fibres. Typically, a steep decrease of power output within the first 50 kJ was followed by a continuous mild decrease until the end of the procedure. After the application of 50 kJ the median power output was 63% (58-73% interquartile range) of the baseline value. The median power output at the end of the 275 kJ-lifespan of the fibres was 42% (40-47%). The median surgeons' rating of the overall performance of the laser fibres was 2 and the median estimated final decrease of power output 60%. Some degree of degradation at the emission window was microscopically detectable in all cases after the procedure. However, even after the application of 275 kJ, these structural changes were only moderate. Minor degradation of the laser fibre was associated with a significant decrease of power output during 120 W LBO-LV. However, following an early, steep decrease, power output

  4. Watt and joule balances

    NASA Astrophysics Data System (ADS)

    Robinson, Ian A.

    2014-04-01

    The time is fast approaching when the SI unit of mass will cease to be based on a single material artefact and will instead be based upon the defined value of a fundamental constant—the Planck constant—h . This change requires that techniques exist both to determine the appropriate value to be assigned to the constant, and to measure mass in terms of the redefined unit. It is important to ensure that these techniques are accurate and reliable to allow full advantage to be taken of the stability and universality provided by the new definition and to guarantee the continuity of the world's mass measurements, which can affect the measurement of many other quantities such as energy and force. Up to now, efforts to provide the basis for such a redefinition of the kilogram were mainly concerned with resolving the discrepancies between individual implementations of the two principal techniques: the x-ray crystal density (XRCD) method [1] and the watt and joule balance methods which are the subject of this special issue. The first three papers report results from the NRC and NIST watt balance groups and the NIM joule balance group. The result from the NRC (formerly the NPL Mk II) watt balance is the first to be reported with a relative standard uncertainty below 2 × 10-8 and the NIST result has a relative standard uncertainty below 5 × 10-8. Both results are shown in figure 1 along with some previous results; the result from the NIM group is not shown on the plot but has a relative uncertainty of 8.9 × 10-6 and is consistent with all the results shown. The Consultative Committee for Mass and Related Quantities (CCM) in its meeting in 2013 produced a resolution [2] which set out the requirements for the number, type and quality of results intended to support the redefinition of the kilogram and required that there should be agreement between them. These results from NRC, NIST and the IAC may be considered to meet these requirements and are likely to be widely debated

  5. SPR-8 multi-mega watt space power system (MMW-SPS) concept description and concept refinement plan

    SciTech Connect

    Walter, C.E.

    1985-04-15

    The SPR-8 MMW-SPS concept can satisfy both continuous and burst mode power requirements. At 10 MWe continuous mode power for 5 yr and 75 MWe burst mode power for 200 sec, the SPR-8 concept can power radar systems for detecting ballistic missile launchings and for discriminating between warheads and decoys. When enemy action is detected the SPR-8 MMW-SPS can power a rail gun, free electron laser, or particle beam and destroy the missile in the boost phase or warheads in space flight. The SPR-8 concept is based on the SPR-6 system (ref. 1) for providing continuous mode power. The system uses a fast UN-fueled, lithium-cooled reactor. Heat is transferred from the lithium coolant to potassium in a shell and tube heat exchanger-boiler. Potassium vapor is expanded through a turbine in a saturated Rankine cycle. After passing through the turbine the potassium is condensed in a compact heat exchanger by transferring heat to the radiator working fluid. An advanced radiator design is envisioned. Much work will be required in radiator technology to achieve low mass and plan form. For completeness of the SPR-8 system concept, a charged liquid droplet radiator is assumed but other types should be considered. Mechanical pumps are used for simplicity, but other types should be considered. A block diagram of the SPR-8 system is given.

  6. Multi-watt power blue light generation by intracavity sum- frequency-mixing in KTiOPO4 crystal.

    PubMed

    Haiyong, Zhu; Ge, Zhang; Chenghui, Huang; Yong, Wei; Lingxiong, Huang; Zhenqiang, Chen

    2008-03-03

    In this paper, a high power blue laser at 447 nm was obtained by intracavity sum-frequency-mixing of a diode-side-pumped Q-switched Nd:YAlO(3)(Nd:YAP) laser operating at 1341.4 nm. A type-I critical phase matching LiB(3)O(5) (LBO) crystal and type-II critical phase matching KTiOPO(4) (KTP) crystal were used for second harmonic generation and third harmonic generation, respectively. The phase matching condition of the KTP crystal was researched. The results show that the KTP has superiority in intracavity sum-frequency-mixing blue light generation. 4.76 W blue light output was achieved at 4.6 kHz with the pulse width of 190ns. The fluctuation of output power was better than 3% at the output power of 4.76 W during half an hour.

  7. Regrowth-free mid-infrared distributed feedback quantum cascade lasers with sub-watt power consumption

    NASA Astrophysics Data System (ADS)

    Briggs, Ryan M.; Frez, Clifford; Fradet, Mathieu; Forouhar, Siamak; Blanchard, Romain; Pflügl, Christian

    2016-03-01

    We report on room-temperature, continuous-wave operation of single-mode quantum cascade lasers designed for minimal threshold power consumption in the 4 to 10 μm spectral range. Narrow-ridge distributed feedback lasers were developed with plasma-etched sidewall corrugations and infrared-transparent dielectric cladding, enabling fabrication without any epitaxial steps beyond the initial growth of the planar laser wafer. The devices exhibit single-mode emission with stable, mode-hop-free tuning and side-mode suppression greater than 25 dB. We demonstrate packaged single-mode devices with continuous-wave threshold power consumption near 1 W above room temperature.

  8. Phosphate single mode large mode area all-solid photonic crystal fiber with multi-watt output power

    SciTech Connect

    Wang, Longfei; He, Dongbing; Yu, Chunlei; Hu, Lili; Chen, Danping; Liu, Hui; Qiu, Jianrong

    2014-03-31

    An index-depressed active core, single-mode phosphate all-solid large-mode-area photonic crystal fiber (PCF) is theoretically investigated using full-vectorial finite difference approach and experimentally realized. The PCF has a maximum output power of 5.4 W and 31% slope efficiency. Single-mode operation is realized through PCFs with core diameters of 30, 35, and 40 μm, respectively. The beam quality is not degraded even at maximum output power. Our simulations and experiments reveal that the laser performance is significantly affected by the center-to-center distance between the two nearest rods Λ, the rod diameter d, and their ratio d/Λ, implying that much attention should be given in employing optimal parameters to achieve excellent laser performance.

  9. Duration-tunable picosecond source at 560  nm with watt-level average power.

    PubMed

    Runcorn, T H; Murray, R T; Kelleher, E J R; Popov, S V; Taylor, J R

    2015-07-01

    A pulse source at 560 nm that is tunable in duration between 50 ps and 2.7 ns with >1  W of average power and near diffraction-limited beam quality is demonstrated. The source is based on efficient (up to 50%) second-harmonic generation in a periodically poled lithium tantalate crystal of a linearly polarized fiber-integrated Raman amplifier operating at 1120 nm. A duration-tunable ytterbium master-oscillator power-fiber amplifier is used to pulse-pump the Raman amplifier, which is seeded by a continuous-wave distributed-feedback laser diode at 1120 nm. The performance of the system using two different master oscillator schemes is compared. A pulse energy of up to 765 nJ is achieved with a conversion efficiency of 25% from the ytterbium fiber pump, demonstrating a compact and turn-key architecture for obtaining high peak-power radiation at 560 nm.

  10. Boston Society's 11th Annual Applied Pharmaceutical Analysis conference.

    PubMed

    Lee, Violet; Liu, Ang; Groeber, Elizabeth; Moghaddam, Mehran; Schiller, James; Tweed, Joseph A; Walker, Gregory S

    2016-02-01

    Boston Society's 11th Annual Applied Pharmaceutical Analysis conference, Hyatt Regency Hotel, Cambridge, MA, USA, 14-16 September 2015 The Boston Society's 11th Annual Applied Pharmaceutical Analysis (APA) conference took place at the Hyatt Regency hotel in Cambridge, MA, on 14-16 September 2015. The 3-day conference affords pharmaceutical professionals, academic researchers and industry regulators the opportunity to collectively participate in meaningful and relevant discussions impacting the areas of pharmaceutical drug development. The APA conference was organized in three workshops encompassing the disciplines of regulated bioanalysis, discovery bioanalysis (encompassing new and emerging technologies) and biotransformation. The conference included a short course titled 'Bioanalytical considerations for the clinical development of antibody-drug conjugates (ADCs)', an engaging poster session, several panel and round table discussions and over 50 diverse talks from leading industry and academic scientists.

  11. Effects of september 11th terrorism stress on estimated duration.

    PubMed

    Anderson, Matthew J; Reis-Costa, Kathleen; Misanin, James R

    2007-06-01

    Previous research has suggested that the duration of stressful video material is estimated to be longer than one containing less stressful material. The current study sought to examine what effects viewing news coverage of the September 11th 2001 terrorist attacks might have on estimated duration of exposure. 16 participants were recruited from Saint Joseph's College of Maine psychology courses and viewed two 3-min. video clips. One clip contained coverage of the 9-11 terrorist attacks; the other, a nonstressful control, was taken from a familiar segment of The Wizard of Oz. Participants estimated the length of the clip and rated stress experienced while viewing the clip. Analysis showed the September 11th footage was rated as more stressful and was estimated as longer than the control clip.

  12. Islamophobia pre- and post-September 11th, 2001.

    PubMed

    Sheridan, Lorraine P

    2006-03-01

    Although much academic research has addressed racism, religious discrimination has been largely ignored. The current study investigates levels of self-reported racial and religious discrimination in a sample of 222 British Muslims. Respondents indicate that following September 11th, 2001, levels of implicit or indirect discrimination rose by 82.6% and experiences of overt discrimination by 76.3%. Thus, the current work demonstrates that major world events may affect not only stereotypes of minority groups but also prejudice toward minorities. Results suggest that religious affiliation may be a more meaningful predictor of prejudice than race or ethnicity. General Health Questionnaire scores indicate that 35.6% of participants likely suffered mental health problems, with significant associations between problem-indicative scores and reports of experiencing a specific abusive incident of September 11th-related abuse by respondents. The dearth of empirical work pertaining to religious discrimination and its effects is a cause for concern.

  13. Drug discovery summit: 11(th) Swiss Course on Medicinal Chemistry.

    PubMed

    Frei, Priska; Navarra, Giulio; Sager, Christoph P; Silbermann, Marleen; Varga, Norbert; Wamhoff, Eike-Christian

    2015-03-01

    A summit amongst the summits: The 11(th) Swiss Course on Medicinal Chemistry was held in October 2014, again in the scenic setting of the Alps in Leysin, Switzerland. One hundred participants, mostly from industry, experienced a week of expert talks about numerous aspects of drug discovery and medicinal chemistry. In this conference report, we briefly summarize the essential topics of this event, while the most inspiring lectures are described in greater detail.

  14. The Watt Count System

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The Watt Count System combines aerospace and computer technology, an engineering systems design approach and the environmental control expertise of a group of engineers who worked on Apollo. First step of the system is a computerized energy consumption analysis based on plans for a new home. Company calculates heating and cooling loads and customizes the most energy efficient system for the particular structure analyzed. A quality control engineer assures that insulation and ducting are installed to specifications. Analysis and design techniques are so accurate that company is able to give homeowner a two-year guarantee that the home's energy consumption will not exceed the kilowatt hour level determined by the computer in step one. In an annual energy performance comparison, a Watt Count home used 45 percent less energy than a conventionally equipped home.

  15. Roots of terrorism: a reassessment after September 11th

    SciTech Connect

    Pilat, Joseph F.

    2002-01-01

    The brutal terrorist attacks of September 11th, the anthrax attacks that followed and growing knowledge of al Qaeda's pursuit of nuclear, biological and chemical weapons have not only intensified concerns about terrorism but also created doubts about our understanding of terrorism. These attacks were in many ways unprecedented, and ultimately raise the question of the roots or causes of terrorism. Historically and today, there have been divergent views on this question, which reflect philosophical, religious, political, sociological and other differences. These differences are not merely academic, as they can affect our understanding of both the threat and of responses to terrorism in the aftermath of September 11th, Terrorism is too complex and diverse a phenomenon to speak easily of causes. But we may be able to discern the causes of specific acts. Our response to 9/11 and other acts of terrorism will be affected by our understanding of their causes. If 9/11 was caused by US Middle East policies, the response must involve a review of these policies. If it is a backlash against globalization, the response must address the realities underlying anti-globalization sentiments. Addressing causes will not in any case end terrorism, and addressing the wrong causes will be counterproductive. Actions to reduce those conditions that create support for terrorism and aid its recruitment, which need to be clearly identified, are critical in any counterterrorism strategy. So we must understand the reasons for terrorism and, in particular, for the attacks of September 11th.T his paper will look at the question of the roots of terrorism and then look to the specific case of 911 and its aftermath, with a special view to the impact of globalization.

  16. PREFACE: 11th European Conference on Applied Superconductivity (EUCAS2013)

    NASA Astrophysics Data System (ADS)

    Farinon, Stefania; Pallecchi, Ilaria; Malagoli, Andrea; Lamura, Gianrico

    2014-05-01

    During the 11th edition of the European Conference on Applied Superconductivity, successfully held in Genoa from 15-19 September 2013, more than one thousand participants from over 40 countries were registered and contributions of 7 plenary lectures, 23 invited talks, 203 oral talks and 550 posters were presented. The present issue of Journal of Physics: Conference Series (JPCS) collects the 218 submitted papers that were peer reviewed and accepted in the Conference Proceedings. Similarly to the Superconductor Science and Technology Special issue: ''EUCAS 11th European Conference on Applied Superconductivity'' which contains some plenary and invited contributions, as well as some selected contributions, in this issue the papers are sorted according to the four traditional topics of interest of EUCAS, namely Materials (56 papers), Wires and Tapes (47 papers), Large Scale Applications (64 papers) and Electronics (51 papers). While the it Superconductors Science and Technology special issue focuses on the scientific and technological highlights of the conference, this collection provides an overall view of the worldwide research activity on applied superconductivity, mirroring the main guidelines and the hottest issues, which range from basic studies on newly discovered superconducting compounds to the state-of-the-art advances in large scale applications, wires and tapes fabrication and electronics. We would like to point out that, among the JPCS contributions, six papers present works financed by ongoing EU-Japan projects, three papers belong to the session on junctions and SQUIDs dedicated to the memory of Antonio Barone and one paper belongs to the session on pinning and flux dynamics dedicated to the memory of John Clem. Finally, we would like to thank all the people whose careful work contributed to the preparation of this JPCS issue, in particular the session chairs as well as the peer reviewers. The Editors Stefania Farinon (Editor in Chief, Large Scale

  17. 11th European VLBI Network Symposium & Users Meeting

    NASA Astrophysics Data System (ADS)

    The Laboratoire d'Astrophysique de Bordeaux (LAB) at the University of Bordeaux (France), on behalf of the European VLBI Consortium, hosted the 11th European VLBI Network (EVN) Symposium and EVN Users Meeting on October 9-12, 2012. The Symposium was held at the "Chambre de Commerce et d'Industrie de Bordeaux", located in the "Palais de la Bourse", in the center of Bordeaux. The conference highlighted the latest scientific results and technical developments from VLBI, space VLBI and e-VLBI. All fields of astrophysics were concerned - stellar, galactic and extragalactic - as well as astrometry and planetary science. Presentations addressing synergy between (e-)VLBI and other new or planned radio facilities (ALMA, LOFAR, e-MERLIN,...) or instruments at other wavelengths (Fermi, CTA, Gaia,...) were also an integral part of the program. The scientific program was organized in 11 sessions including 71 oral presentations, with an additional 43 posters available for viewing during the entire length of the conference. An EVN Users Meeting was also held during one of the evening to foster interaction between the EVN users and the EVN organization. The symposium was attended by a total of 122 delegates originating from 47 institutes world-wide, sharing new VLBI science and innovations while also building links with other communities. The research leading to these results has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 283393 (RadioNet3).

  18. Specification for strontium-90 500-watt(e) radioisotopic thermoelectric generator. Final report

    SciTech Connect

    Hammel, T.; Himes, J.; Lieberman, A.; McGrew, J.; Owings, D.; Schumann, F.

    1983-04-01

    A conceptual design for a demonstration 500-watt(e) radioisotopic thermoelectric generator has been created for the Department of Energy. The design effort was divided into two tasks, viz., create a design specification for a capsule strength member that utilizes a standard Strontium-90 fluoride-filled WESF inner liner, and create a conceptual design for a 500-watt(e) RTG. Both tasks have been accomplished. The strength-member specification was designed to survive an external pressure of 24,500 psi and meet the requirements of special-form radioisotope heat sources. Therefore the capsule can, if desired, be licensed for domestic and international transport. The design for the RTG features a radioisotopic heat source, an array of nine capsules in a tungsten biological shield, four current-technology series-connected thermoelectric-conversion modules, low-conductivity thermal insulation, and a passive finned-housing radiator for waste-heat dissipation. The preliminary RTG specification formulated previous to contract award has been met or exceeded. The power source will generate the required power for the required service period at 28 volts dc with a conversion efficiency of 8%, provided the existing in-pool capsules at WESF meet the assumed thermal-inventory requirements.

  19. The roots of terrorism: A reassessment after September 11th

    SciTech Connect

    Pilat, Joseph F.

    2002-01-01

    The brutal terrorist attacks of September 11th, the anthrax attacks that followed and growing knowledge of al Qaeda's pursuit of nuclear, biological and chemical weapons have not only intensified concerns about terrorism but also created doubts about our understanding of terrorism. These attacks were in many ways unprecedented, and ultimately raise the question of the roots or causes of terrorism. Historically and today, there have been divergent views on this question, which reflect philosophical, religious, political and other differences. These differences are not merely academic, as they can affect our understanding of both the threat and of responses to terrorism in the aftermath of September 1 1 th. Terrorism is too complex and diverse a phenomenon to speak easily of causes. But we may be able to discern the causes of specific acts. Our response to 9/11 and other acts of terrorism will be affected by our understanding of their causes, as well as by possible political requirements to address widespread perceptions of causes. If 9/11 was caused by Islamic radicalism, the near-term response must be to ensure the terrorists are defeated and pose no fiuther danger. In the longer term, education is critical. If the attacks were caused by US Middle East policies, the response should involve a review of those policies. This may or may not result in changes to policy, public diplomacy, etc. If the attacks were a backlash against globalization, the response must address the realities underlying anti-globalization sentiments. Addressing causes (real and perceived) will not in any case end terrorism, and addressing the wrong causes can be counterproductive. Actions to reduce those conditions that create support for terrorism and aid its recruitment effort are critical to any counterterrorism strategy. For this reason alone, we must do everything possible to understand the reasons terrorism may be undertaken, including the attacks of September 1 1 th. This paper will look

  20. VIEW OF COMPANY HOUSES ON 11TH STREET AT THE RAILROAD ...

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

    VIEW OF COMPANY HOUSES ON 11TH STREET AT THE RAILROAD TRACKS. No. 401 to right (asbestos siding). House on left has retained the original clapboard siding. - Town of Windber, Windber, Somerset County, PA

  1. The Effects of 11th Graders' Opinions on Their Interpretation of Conflicting Arguments.

    ERIC Educational Resources Information Center

    Slater, Wayne H.

    1998-01-01

    Examines how individual differences in epistemological beliefs, strength of beliefs, and need for cognition affected the written conclusions that 11th graders constructed after reading a passage presenting arguments opposing and supporting gun control. (SR)

  2. 16. NORTHEAST CORNER VIEW OF 10TH AND 11TH FLOOR WINDOWS. ...

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

    16. NORTHEAST CORNER VIEW OF 10TH AND 11TH FLOOR WINDOWS. CORNER SHOWS THE DIAGONALLY FLUTED SPIRAL DESIGN OF THE RELIEF COLUMN. - Pacific Telephone & Telegraph Company Building, 1519 Franklin Street, Oakland, Alameda County, CA

  3. A changed America? The effects of September 11th on depressive symptoms and alcohol consumption.

    PubMed

    Knudsen, Hannah K; Roman, Paul M; Johnson, J Aaron; Ducharme, Lori J

    2005-09-01

    In the weeks following the terrorist attacks of September 11, 2001, social commentators argued that America had profoundly "changed." In light of these arguments and the literature on disasters, we examine the immediate and longer-term mental health consequences of September 11th using a national sample of full-time American workers. We model the effects of temporal proximity to the attacks on depressive symptoms and alcohol consumption, while controlling for demographic characteristics. Our data revealed a significant increase in the number of depressive symptoms reported during the 4 weeks after the attacks. In the subsequent weeks, levels of depressive symptoms returned to pre-September 11th levels. Contrary to expectations, there was some indication of decreased alcohol consumption after September 11th, although these effects were modest. These analyses provide little support for popular assertions that September 11th resulted in lasting and measurable impacts on Americans' well-being.

  4. E SERIES MAGAZINES, OVERVIEW OF REAR OF MAGAZINES FROM 11TH ...

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

    E SERIES MAGAZINES, OVERVIEW OF REAR OF MAGAZINES FROM 11TH ST. E 106 IN THE FOREGROUND. - Naval Magazine Lualualei, Headquarters Branch, Magazine Type, Eleventh, Thirteenth, Fifteenth, Sixteenth, & Seventeenth Streets, Pearl City, Honolulu County, HI

  5. 14. CLOSEUP VIEW OF THE 10TH AND 11TH FLOOR WINDOWS. ...

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

    14. CLOSE-UP VIEW OF THE 10TH AND 11TH FLOOR WINDOWS. WINDOWS HAVE WHITE TERRA COTTA SILLS, HEADS AND MULLIONS. ARCHES ARE OF TERRA COTTA INCLUDING ORNAMENTATION ABOVE THE 11TH FLOOR WINDOWS. CIRCULAR ORNAMENTATIONS BETWEEN ARCHES ARE TERRA COTTA PAINTED IN BRONZE COLOR. LOUVERS ON THE WINDOWS ARE NOT PART OF THE ORIGINAL DESIGN. THIS IS THE FRONT ELEVATION. - Pacific Telephone & Telegraph Company Building, 1519 Franklin Street, Oakland, Alameda County, CA

  6. NLEP--current situation and strategy during the 11th plan period (2007-2012).

    PubMed

    Dhillon, G P S

    2006-12-01

    National Leprosy Control Programme was established in 1955 based on dapsone domiciliary treatment. The multidrug therapy came into wide use from 1982. Based on the recommendations of the high power committee established by the Government of India, the NLEP was launched in 1983 with the objective to arrest the disease activity in all the known cases of leprosy. In order to strengthen the process of elimination of the disease in this country, the first World Bank supported project was introduced in 1993. The 2nd phase of the elimination project was started in 2001-02 and ended in December 2004. The prevalence rate of leprosy was found to be 0.95/10,000 population by December 2005, a success in the elimination of leprosy. On 30th September 2006 the rate on record is 0.89/10,000 population, a further decline. During 2005-06 the annual new case detection rate was 14.27 per 100,000 population which was 23.4 during 2004-05, a reduction of 39.0%. During the 11th plan period (April 2007 to March 2012) the government proposes to carry on the leprosy programme with the same intensity further to achieve annual new case detection rate less than 10 cases per 100,000 population.

  7. High-efficiency, 200 watt, 12-gigahertz traveling wave tube

    NASA Technical Reports Server (NTRS)

    Kosmahl, H. G.; Mcnary, B. D.; Sauseng, O.

    1974-01-01

    Design and performance of a highly efficient experimental 200-watt traveling wave tube for space communications are described. The tube uses a coupled cavity slow wave structure with periodic permanent magnet focusing. A two-step velocity taper is incorporated in the slow wave structure for velocity resynchronization with the modulated beam. The spent beam is reconditioned in a refocusing section before it is collected in a novel multistage depressed collector. The collector is radiation cooled and heat insulated from the tube body. At saturation the tube provides peak output power of 240 watts with a 35-db gain and an overall maximum efficiency of 56 percent.

  8. A 20 GHz, 75 watt helix TWT for space communications

    NASA Astrophysics Data System (ADS)

    Heney, J. F.; Tamashiro, R. N.

    A space-qualified, helix-type traveling wave tube is being developed for satellite communication systems in the frequency band of 17.7 to 21.2 GHz. The design approach stresses very high efficiency operation, but with very low distortion. The tube provides multi-mode operation, permitting CW saturated power output levels of 75 watts, 40 watt and 7.5 watts. Operation is also anticipated at 5 dB below these saturation levels to achieve the required low distortion levels. Advanced construction features include a 5 stage depressed collector, a diamond supported helix slow-wave circuit, and a type M dispenser cathode. High reliability and long life (10 years) are objectives of the tube design. The status of the development and recent experimental results are presented.

  9. Adolescent Vulnerability Following the September 11th Terrorist Attacks: A Study of Parents and Their Children

    ERIC Educational Resources Information Center

    Gil-Rivas, Virginia; Holman, E. Alison; Silver, Roxane Cohen

    2004-01-01

    Approximately 2 weeks after September 11th, adolescents from a national sample of households who were indirectly exposed to the terrorist attacks through the media completed a Web-based survey that assessed event-related acute stress symptoms. One year later, these adolescents (N = 142) and a randomly selected parent from their household completed…

  10. Agreement on Use of 11th Grade Smarter Balanced Assessment Results for Student Placement. Issue Brief

    ERIC Educational Resources Information Center

    Washington State Board for Community and Technical Colleges, 2014

    2014-01-01

    This issue brief lists the agreement principles relating to the use of 11th grade career and college readiness assessment results for student placement in Washington community and technical colleges. As part of the Washington implementation of the new Common Core State Standards for college- and career-readiness, the agreement described herein has…

  11. September 11th, the Internet, and the Affects on Information Provision in Libraries.

    ERIC Educational Resources Information Center

    Hamilton, Stuart

    The September 11th terrorist attacks on the United States have contributed greatly to a change in the information environment around the world. The weeks following the attacks saw governments around the world rush to pass legislation designed to prevent future acts of terrorism. Much of this legislation targeted information flow, especially on the…

  12. Asian Studies: Experimental Course of Study, 11th or 12th Year Elective.

    ERIC Educational Resources Information Center

    Fryberg, Carl

    This experimental course of study has a twofold purpose. Primarily, it is intended to serve as basis for an elective for the 11th or 12th year student. Openended in organization, it encourages teachers and students to add new dimensions. It provides a comprehensive bibliography and detailed information with which to develop an elective in the area…

  13. Emotional Intelligence as a Predictor of Leadership of Kuwaiti High and Low Achieving 11th Graders

    ERIC Educational Resources Information Center

    Alnabhan, Mousa

    2010-01-01

    The current study examined the association between emotional intelligence (EI) and the Leadership components (L) of high school students in the state of Kuwait. The possibility of predicting each leadership component via emotional intelligence components was investigated for high and low achievers. A sample of 11th grade students from Kuwaiti…

  14. 77 FR 43823 - Filing Dates for the Michigan Special Election in the 11th Congressional District

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-26

    ... From the Federal Register Online via the Government Publishing Office FEDERAL ELECTION COMMISSION Filing Dates for the Michigan Special Election in the 11th Congressional District AGENCY: Federal Election Commission. ACTION: Notice of filing dates for special election. SUMMARY: Michigan has...

  15. Phoenix Ranks 11th on EPAs Energy Star Top Cities List

    EPA Pesticide Factsheets

    SAN FRANCISCO - Today, the U.S. Environmental Protection Agency (EPA) released its seventh-annual list of the top 25 U.S. metropolitan areas with the most Energy Star certified buildings in 2014. This year, Phoenix ranks 11 th with 165 bui

  16. Impact of the September 11th Terrorist Attacks on Teenagers' Mental Health

    ERIC Educational Resources Information Center

    Gould, Madelyn S.; Munfakh, Jimmie Lou Harris; Kleinman, Marjorie; Lubell, Keri; Provenzano, Danielle

    2004-01-01

    The impact of the September 11th terrorist attacks on adolescents' mental health is reported. Two successive cohorts of students in 6 New York state high schools, identified from health courses, completed an in-school self-report baseline assessment of hopelessness, impairment, and help-seeking behavior. One year later, these students completed a…

  17. Labor Market Effects of September 11th on Arab and Muslim Residents of the United States

    ERIC Educational Resources Information Center

    Kaushal, Neeraj; Kaestner, Robert; Reimers, Cordelia

    2007-01-01

    We investigated whether the September 11, 2001 terrorists' attacks had any effect on employment, earnings, and residential mobility of first- and second-generation Arab and Muslim men in the United States. We find that September 11th did not significantly affect employment and hours of work of Arab and Muslim men, but was associated with a 9-11…

  18. Review of "The September 11th Education Program: A National Interdisciplinary Curriculum"

    ERIC Educational Resources Information Center

    Waterson, Robert A.; Jenne, Katherine

    2011-01-01

    A review of "The September 11th Education Program: A National Interdisciplinary Curriculum" reveals a sensitive and well-created program for the 5-12 social studies teacher to use in teaching about the challenging subject of 9/11. This program provides an opportunity for teachers to find a balance among understanding, critical analysis,…

  19. The Federal Forecasters Conference--2000. Papers and Proceedings (11th, Washington, DC, September 14, 2000).

    ERIC Educational Resources Information Center

    Gerald, Debra, E., Ed.

    The 11th Federal Forecasters Conference provided a forum where 180 forecasters from different federal agencies and other organizations could meet and discuss forecasting in the United States. The theme for this conference was "Forecasting, Policy, and the Internet." In the morning session, a panel presentation featured three speakers. Neilson C.…

  20. Evaluation of 11th Grade Students' Cognitive Behaviour on Some Subjects of Analysis According to Gender

    ERIC Educational Resources Information Center

    Nevin, Orhun

    2005-01-01

    The purpose of this research is to investigate students' cognitive behaviour in the subjects of function, limit, and derivative according to gender. The research was conducted with the participation of 67 female and 58 male 11th grade students of Gazi High School in Eskisehir in the academic year 2000/2001. The data were obtained through a test…

  1. State Education & Environment Roundtable (SEER) Seminar (11th, Des Moines, Iowa, May 20-24, 2001).

    ERIC Educational Resources Information Center

    Lieberman, Gerald A.; Hoody, Linda L.

    This document reports on the 11th seminar of the State Education and Environment Roundtable (SEER). It consists of brief overviews of the daily discussions and presentations that were made at the seminar. Topics discussed include potential partnerships with national language arts organizations and associations, how environmental justice issues…

  2. Expertise, Argumentation and Scientific Practice: A Case Study about Environmental Education in the 11th Grade.

    ERIC Educational Resources Information Center

    Jimenez Alexandre, Maria Pilar; Pereiro Munoz, Cristina; Aznar Cuadrado, Virginia

    This paper reports a case study about argumentation and scientific practice in the 11th grade. The objectives of the study are to identify argument patterns and dimensions of the scientific practice in students' conversations and actions while engaged in an environmental management project in a wetland. The focus are the warrants that students…

  3. 11th Annual NIH Pain Consortium Symposium on Advances in Pain Research | Division of Cancer Prevention

    Cancer.gov

    The NIH Pain Consortium will convene the 11th Annual NIH Pain Consortium Symposium on Advances in Pain Research, featuring keynote speakers and expert panel sessions on Innovative Models and Methods. The first keynote address will be delivered by David J. Clark, MD, PhD, Stanford University entitled “Challenges of Translational Pain Research: What Makes a Good Model?” |

  4. Feasibility study of a 200 watt per kilogram lightweight solar array system. [for interplanetary spacecraft

    NASA Technical Reports Server (NTRS)

    Stanhouse, R.; Cokonis, J.; Rayl, G.

    1976-01-01

    Progress in an investigation of the feasibility of designing a lightweight solar array with a power-to-weight ratio of 200 watts per kilogram is described. This solar array will produce 10,000 watts of electrical power at 1 A.U. at its beginning of life (BOL), and degrade less than 20% over a three year period in interplanetary flight. A review of existing lightweight solar array system concepts is presented along with discussion pertaining to their applicable technology as it relates to a 200 watt/kilogram array. Also presented is a discussion of the candidate development solar cells being considered, and various deployable boom concepts under investigation.

  5. 300 WATT PORTABLE THERMOELECTRIC GENERATOR.

    DTIC Science & Technology

    THERMOELECTRICITY, POWER SUPPLIES), (* GENERATORS , THERMOELECTRICITY), (*ELECTRIC POWER PRODUCTION, THERMOELECTRICITY), PORTABLE EQUIPMENT, THERMOCOUPLES, ENERGY CONVERSION, HEAT EXCHANGERS, WIRING DIAGRAMS

  6. Two-watt, 4-Kelvin closed cycle refrigerator performance

    NASA Technical Reports Server (NTRS)

    Britcliffe, M.

    1987-01-01

    A 2-watt, 4-K helium refrigerator using the Gifford-McMahon/Joule Thomson cycle is described. The unit features a removable displacer cylinder and high-efficiency, low-pressure drop heat exchangers. These improvements result in a 100 percent increase in cooling power over the existing Deep Space Network system. The effects of the heat exchanger efficiency and Gifford-McMahon expander performance on refrigerator capacity are also discussed.

  7. Selected papers from the 11th European Conference on Applied Superconductivity (EUCAS 2013)

    NASA Astrophysics Data System (ADS)

    Ferdeghini, Carlo; Putti, Marina

    2014-04-01

    The 11th edition of the European Conference on Applied Superconductivity (EUCAS) was held in Genoa (15-19 September 2013) and registered the participation of more than one thousand attendants from over 40 countries. During the conference seven plenary lectures, 23 invited, and 203 oral contributions and 550 posters have been presented, all focused on recent developments in the field of superconductivity applications. This issue of Superconductor Science Technology is a collection of some of the plenary and invited contributions. Moreover, the winners of the EUCAS prizes (the electronics prize dedicated to the memory of Antonio Barone), and the most significant oral contributions selected by the 125 chairs involved in the organization, have been invited to submit their papers. The remaining papers presented at the conference will be published in the Journal Physics Conference Series, edited by S Farinon, G Lamura, A Malagoli and I Pallecchi. The papers have been organized into the four traditional topics of interest of EUCAS, namely materials, wires and tapes, large scale applications, and electronics. The plenary lectures on these four topics have been collected: Potential of iron-based superconductors for practical materials in the future (J Shimoyama), Coated conductors for power applications: materials challenges (J Obradors), Challenges and status of ITER conductor production (A Devred), and the Impact of superconducting devices in imaging in neuroscience (G L Romani). We hope that this issue will let you taste the flavours, hear the sounds and see the colours of this exciting EUCAS edition. The very large participation in EUCAS 2013 has allowed debates on a wide range of topics, starting from the most basic studies on emergent materials up to the new developments in electronics and large scale applications. A round table on HTS Conductors was experimented for the first time gathering material scientists, wire manufacturers and device builders in a stimulating

  8. 300 WATT PORTABLE THERMOELECTRIC GENERATOR.

    DTIC Science & Technology

    GENERATORS , *ELECTRIC POWER PRODUCTION, POWER SUPPLIES, THERMOELECTRICITY, THERMOELECTRICITY, PORTABLE EQUIPMENT, THERMOCOUPLES, ENERGY CONVERSION, LIFE EXPECTANCY(SERVICE LIFE), HEAT TRANSFER, VOLTAGE REGULATORS.

  9. Report of the 11th World Congress of Pediatric Dermatology in Bangkok, Thailand.

    PubMed

    Pruksachatkun, Chulabhorn

    2010-01-01

    The 11th World Congress of Pediatric Dermatology took place at the Queen Sirikit National Convention Center, Bangkok, Thailand on 17 to 19 November 2009. The theme was "Health and Beauty in Pediatric Dermatology." This report highlights several presentations discussing hemangiomas, infections, and novel and future diagnostic methods and treatment of pediatric dermatologic conditions. This report is not intended as a substitute for reading the conference educational handouts, online updates and related references quoted in this article.

  10. CONFERENCE REPORT: 11th EU-US Transport Task Force workshop on transport in fusion plasmas

    NASA Astrophysics Data System (ADS)

    Connor, J. W.; Angioni, C.; Diamond, P. H.; Hammett, G. W.; Hidalgo, C.; Loarte, A.; Mantica, P.

    2007-04-01

    This report summarizes the contributions presented at the 11th EU-US Transport Task Force workshop on transport in fusion plasmas, held in Marseilles, France, 4-7 September, 20068The present workshop: http://www-fusion-magnetique.cea.fr/ttf2006.. There were sessions on momentum transport, multi-scale physics, electron transport, particle transport and transport in the scrape-off layer.

  11. The Reporting of the September 11th Terrorist Attacks in American Social Studies Textbooks: A Muslim Perspective

    ERIC Educational Resources Information Center

    Saleem, Mohammed M.; Thomas, Michael K.

    2011-01-01

    This study analyzes the reporting of the September 11th terrorist attacks in social studies textbooks from a Muslim perspective and reports on findings from a study of the responses of American Muslim children to the treatment of the events of September 11th in social studies textbooks. Constructivist grounded theory was used to centralize the…

  12. God, James Watt, and the public's land

    SciTech Connect

    Wolf, R.

    1981-05-01

    The political career of James Watt, Secretary of the Interior, is chronicled. His current reputation as archenemy of the environmental movement is largely the outgrowth of three and a half years of activity on behalf of the Mountain States Legal Foundation. Since taking office in January 1981, Watt has moved swiftly to impose his individual standards on USDI. Various programs and agencies are being terminated, and public lands may soon be open for mineral and energy exploitation. (7 drawings, 1 photo)

  13. Design and Performance of 20 Watts Portable Solar Generator

    NASA Astrophysics Data System (ADS)

    Majid, Z. A. Abdul; Hazali, N.; Hanafiah, M. A. K. M.; Abdullah, A. A.; Ismail, A. F.; Ruslan, M. H.; Sopian, K.; Mohd Azmi, M. S.

    2012-09-01

    A new portable solar generator has been developed to generate electricity. It has the potential to replace petrol generator, widely used by peddlers at night markets (pasar malam). Conventional generators are heavy, oily, have high maintenance and use fossil fuel to generate electricity. The solar generator can generate 20 Watts of electricity. This amount of power can supply up to 96 hours of electricity for the purpose of lighting and running small electrical appliances. The power output is (alternating current) AC current using 150 Watts inverter with 200 Watts surge, suitable for all commercial single phase electric appliances. Solar charge controller is used to maximize the charging rate and to protect the battery. The system has low maintenance whereby the batteries need to be changed every three to four years, depending on the usage. The main concepts of portable solar generator are to reduce installation cost and to introduce a compact design of an optimal energy sizing system. The materials used to develop the solar generator can be easily obtained from local markets, thus reducing the cost of developing the system and making it suitable for commercialization.

  14. Mental health needs in New York state following the September 11th attacks.

    PubMed

    Herman, Daniel; Felton, Chip; Susser, Ezra

    2002-09-01

    In October 2001, the New York State Office of Mental Health and the Department of Epidemiology of the Mailman School of Public Health of Columbia University conducted a rapid assessment of the nature and magnitude of mental health needs in the state resulting from the September 11th terrorist attacks on the World Trade Center. This effort was carried out during a period of great turmoil and uncertainty as New Yorkers responded to the shocking events of this unprecedented disaster. Using the limited data available at the time, we estimated that over 520,000 persons in New York City and the surrounding counties would experience posttraumatic stress disorder resulting from exposure to the attacks, and that more than 129,000 would seek treatment for this disorder during 2002. This assessment is part of an ongoing collaborative process between public and academic partners; the effort is designed to strengthen the capacity of the mental health system to respond to current and future terrorism. Estimates from this initial assessment will be refined over time as further data concerning the impact of the September 11th attacks become available.

  15. Posttraumatic stress disorder in Manhattan, New York City, after the September 11th terrorist attacks.

    PubMed

    Galea, Sandro; Resnick, Heidi; Ahern, Jennifer; Gold, Joel; Bucuvalas, Michael; Kilpatrick, Dean; Stuber, Jennifer; Vlahov, David

    2002-09-01

    Estimates of acute mental health symptoms in the general population after disasters are scarce. We assessed the prevalence and correlates of acute posttraumatic stress disorder (PTSD) in residents of Manhattan 5-8 weeks after the terrorist attacks of September 11, 2001. We used random-digit dialing to contact a representative sample of adults living in Manhattan below 110th Street. Participants were interviewed about prior life events, personal characteristics, exposure to the events of September 11th, and psychological symptoms after the attack. Among 988 eligible adults, 19.3% reported symptoms consistent with PTSD at some point in their life, and 8.8% reported symptoms consistent with a diagnosis of current (within the past 30 days) PTSD. Overall, 57.8% of respondents reported at least one PTSD symptom in the past month. The most common past-month symptoms were intrusive memories (27.4%) and insomnia (24.5%). Predictors of current PTSD in a multivariable model were residence below Canal Street, low social support, life stressors 12 months prior to September 11th, perievent panic attack, losing possessions in the attacks, and involvement in the rescue efforts. These findings can help guide resource planning for future disasters in densely populated urban areas.

  16. A 75 Watt, 59 to 64 Ghz Space TWT

    NASA Technical Reports Server (NTRS)

    Limburg, Helen; Zamora, Diego; Davis, Jon; Tammaru, Ivo

    1995-01-01

    The design and performance of a high efficiency 70 Watt, 59 to 64 GHz traveling-wave tube (TWT) is described. This intersatellite communications TWT, designated the Hughes Aircraft Company Model 961HA, employs a coupled-cavity slow-wave structure with a two-step velocity taper and a four-stage isotropic graphite multistage depressed collector (MDC). This TWT achieved outstanding beam transmission, 96% with RF. This is the highest power and widest bandwidth device of this type. The tube has 45 dB of gain and 30% efficiency. This TWT is conduction cooled and weighs 13 lbs.

  17. Nathan Watt: A True American Idol

    ERIC Educational Resources Information Center

    Watt, Diana

    2006-01-01

    In this article, the author profiles her son Nathan Watt, a 14-year-old who was born with Spina Bifida, who does not allow setbacks to keep him from achieving his goals and dreams in the areas of writing, recording, and performing his own music. He has also opened a business website and turned his story, "Anything is Possible," into a color story…

  18. 11th National Conference on Science, Policy, and the Environment: Our Changing Oceans

    SciTech Connect

    Peter Saundry

    2012-04-17

    On January 19-21, 2011, The National Council for Science and the Environment (NCSE) successfully convened its 11th National Conference on Science, Policy and the Environment: Our Changing Oceans in Washington, DC at the Ronald Reagan Building and International Trade Center. Over 1,247 participants attended the conference, representing federal, state and local governments, university and colleges across the US, civil society organizations, the business community, and international entities. In addition, the conference was webcast to an audience across several states. The conference provided a forum to examine the profound changes our ocean will undergo over the next 25-50 years and share various perspectives on the new research, tools, and policy initiatives to protect and sustain our ocean. Conference highlights and recommendations are available to the public on NCSE's conference website, www.OurChangingOceans.org.

  19. Total solar eclipse on August 11th 1999, observed at Kelebija

    NASA Astrophysics Data System (ADS)

    Božić, N.

    2003-10-01

    The observing results of the total solar eclipse on 11th August 1999 are presented. The observation has been made by the Astronomical Division of the Research Society "Vladimir Mandic - Manda" from Valjevo at the village Kelebija (Yugoslavia). The following projects were handled: the photometry of the whole sky, the variability of the magnetic field, atmospheric changes, attendant changes in plants' and animals' behaviour during the eclipse. During the eclipse the decrease of intensity of the local magnetic field was estimated. The temperature dropped by 5.2°C, the humidity has increased, while the atmospheric pressure didn't show any tendency of change. All the plants and animals showed some reaction to the eclipse. A rich photo, video and audio documentary material has been collected.

  20. Pachyonychia congenita cornered: report on the 11th Annual International Pachyonychia Congenita Consortium Meeting.

    PubMed

    O'Toole, E A; Kaspar, R L; Sprecher, E; Schwartz, M E; Rittié, L

    2014-11-01

    This is a report of the research presented at the 11th Annual Meeting of the International Pachyonychia Congenita Consortium, held on 6 May 2014 in Albuquerque, NM, U.S.A. This year's meeting was divided into five corners concerning pachyonychia congenita (PC) research: (i) 'PC Pathogenesis Cornered', an overview of recent keratin research, for PC and other skin disorders; (ii) 'From All Corners of …', an outline of other genetic disorders that we can learn from; (iii) 'Fighting For Our Corner', an outline of National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases programmes and U.S. funding opportunities applicable to rare skin disorders; (iv) 'The PC Corner', focusing on recent clinical studies related to PC; and (v) 'Clinical Corners: Turning the Corner?', an update on ongoing PC clinical trials.

  1. September 11th--ripples across the ocean: perspectives from Tripler Army Medical Center.

    PubMed

    Staudenmeier, James J; Hill, Jeffrey V

    2002-09-01

    The events of September 11, 2001, or 9-11 as called by the media, will live in United States' memory forever. Even far-flung Hawaii shuddered with the rest of the United States. This brief article describes the September 11th experiences and fallout of three individuals living in Hawaii. One is a description of how the events worsened a client's illness. Two others are psychiatrists' accounts: one staff, another child fellow. These accounts describe how even those living in remote locales may be affected by significant world events. Even though individuals may not appear to be at risk to have much risk of psychopathology, they may experience subclinical symptoms. Individuals who do have mental illness may risk worsening of their symptoms.

  2. The impact of the September 11th terrorist attacks on psychiatric patients: a review.

    PubMed

    Franz, Victoria A; Glass, Carol R; Arnkoff, Diane B; Dutton, Mary Ann

    2009-06-01

    Studies of the general population have shown that the terrorist attacks of September 11, 2001 had a well-documented psychological effect, regardless of whether or not individuals were directly exposed to the events. In light of findings that pre-existing mental illness and prior exposure to trauma are associated with vulnerability to PTSD following a subsequent traumatic event, this article reviews research on the impact of the September 11th terrorist attacks on psychiatric patients. Findings suggest that, in general, psychiatric patients experienced immediate and long-term posttraumatic symptoms at levels greater than normal controls, although there were differential effects by diagnostic group and symptoms as observed did not always match complaints of subjective impairment. Studies sampling inpatients and outpatients, as well as research regarding service utilization, are evaluated. Assessment and treatment implications for clinicians responsible for the care of psychiatric patients following a national trauma are discussed, and recommendations for future research are presented.

  3. Forgiving the September 11th terrorists: associations with coping, psychological distress, and religiosity.

    PubMed

    Rhoades, Galena Kline; McIntosh, Daniel N; Wadsworth, Martha E; Ahlkvist, Jarl A; Burwell, Rebecca A; Gudmundsen, Gretchen R; Raviv, Tali; Rea, Jacqueline G

    2007-06-01

    Two studies examined how non-interpersonal forgiveness (when there is no social relationship between the transgressor and forgiver) related to coping and involuntary responses to stress, psychological distress, and religiosity. Three to six weeks after September 11th, 2001, forgiveness had non-linear associations with other responses to the terrorist attacks. Among college students (N=488), those who were trying or had forgiven (pro-forgiveness) the terrorists reported less involuntary engagement, more primary and secondary control coping, and more meaning finding than those who were unsure about forgiveness (ambivalent) and those who did not believe the perpetrators should be forgiven (anti-forgiveness). Ambivalent students reported the most distress, even after controlling for religion. Anti-forgiveness students reported less religiosity than ambivalent and pro-forgiveness students. Most findings were consistent among middle schoolers (N=154), particularly regarding psychological distress and responses to stress. Also, forgiveness of strangers for acts against one's community functioned separately from religion.

  4. Wake of September 11th attacks: implications for research, policy and practice.

    PubMed

    Darden, Madeline Lyles

    2002-02-01

    The National Consortium for African American Children (NCAAC) held a National Forum on Bioterrorism and Children on November 6, 2001 in Washington, DC. Convened in the wake of the September 11th attacks on New York City and the Pentagon, this unprecedented conference assembled a cross-section of professionals in child advocacy, health, mental health, insurance, economics, law enforcement, and media technology. The ensuing discussion focused on issues surrounding biological agents, their impact on children and youth, and the strategies needed to protect the health and mental health of children and families in the event of a large-scale bioterrorist crisis. Lessons learned as well as the implications of the terrorist acts from the tragic events of September 11th formed the backdrop for engaging dialogue among various industry executives and professionals. Accounts of personal experiences during the unprecedented tragedy of 9-11 were shared and provided a context for heightened preparedness planning for children and adults. A collaborative statement was also presented by NCAAC, the National Medical Association, the Association of Black Psychologists, and the National Black Media Coalition. This forum was hailed as a model for communities of color to join and help bolster broad-based coalition building to ensure the availability of culturally and linguistically appropriate messages, services, and support. As intended, the forum devoted significant attention to the special needs of children, their caregivers and families and provided for an invaluable interchange which is slated to evolve into a national action plan to address the imminent dangers facing our nation's children.

  5. 1-watt composite-slab Er:YAG laser. Revision 1

    SciTech Connect

    Page, R.H.; Bartels, R.A.; Beach, R.J.; Sutton, S.B.; Furu, L.H.; LaSala, J.E.

    1997-02-13

    A diode-side-pumped discrete-optic Er{sup 3+} :YAG laser employs pump-light coupling through a sapphire plate diffusion-bonded to the laser slab, removing heat directly at the pump face of the slab instead of requiring conduction through to its far side. This lowers the temperature in the gain region and gives reduced thermal lensing, which produces exceptional beam quality (M{sup 2} {approx} 1.3) at output powers {approx} 0.3 Watt. Powers above 1 Watt have been demonstrated with peak slope efficiencies {approx}20%. The novel architecture is also applicable to other side-pumped lasers.

  6. Gut Microbiome of an 11th Century A.D. Pre-Columbian Andean Mummy.

    PubMed

    Santiago-Rodriguez, Tasha M; Fornaciari, Gino; Luciani, Stefania; Dowd, Scot E; Toranzos, Gary A; Marota, Isolina; Cano, Raul J

    2015-01-01

    The process of natural mummification is a rare and unique process from which little is known about the resulting microbial community structure. In the present study, we characterized the microbiome of paleofeces, and ascending, transverse and descending colon of an 11th century A.D. pre-Columbian Andean mummy by 16S rRNA gene high-throughput sequencing and metagenomics. Firmicutes were the most abundant bacterial group, with Clostridium spp. comprising up to 96.2% of the mummified gut, while Turicibacter spp. represented 89.2% of the bacteria identified in the paleofeces. Microbiome profile of the paleofeces was unique when compared to previously characterized coprolites that did not undergo natural mummification. We identified DNA sequences homologous to Clostridium botulinum, Trypanosoma cruzi and human papillomaviruses (HPVs). Unexpectedly, putative antibiotic-resistance genes including beta-lactamases, penicillin-binding proteins, resistance to fosfomycin, chloramphenicol, aminoglycosides, macrolides, sulfa, quinolones, tetracycline and vancomycin, and multi-drug transporters, were also identified. The presence of putative antibiotic-resistance genes suggests that resistance may not necessarily be associated with a selective pressure of antibiotics or contact with European cultures. Identification of pathogens and antibiotic-resistance genes in ancient human specimens will aid in the understanding of the evolution of pathogens as a way to treat and prevent diseases caused by bacteria, microbial eukaryotes and viruses.

  7. PREFACE: 11th Anglo-French Physical Acoustics Conference (AFPAC 2012)

    NASA Astrophysics Data System (ADS)

    Saffari, Nader; Lhémery, Alain; Lowe, Mike

    2013-08-01

    The 11th Anglo-French Physical Acoustics Conference (AFPAC) was held in Brighton, UK on 18-20 January 2012. This event, which is an annual collaboration between the Physical Acoustics Group (PAG) of the Institute of Physics and the Groupe d'Acoustique Physique, Sous-marine et UltraSonore (GAPSUS) of the Société Française d'Acoustique, successfully achieved its main aim of being a small, friendly meeting of high scientific quality, welcoming younger researchers and PhD students and covering a broad range of subjects in Acoustics. The participants heard 44 excellent presentations covering an exciting and diverse range of subjects, from audio acoustics to guided waves in composites and from phononic crystals to ultrasound surgery. As is the custom at these meetings, four prominent invited speakers set the pace for the event; these were Keith Attenborough (The Open University, UK), Claire Prada (Institut Langevin, France), David Moore (University of Nottingham, UK) and Philippe Roux (IS Terre, France). The submission of manuscripts for publication in the proceedings was, as in previous years, on a voluntary basis and in these proceedings we present 11 peer reviewed papers. Due to some unforeseen problems there has been a longer than planned delay in preparing these proceedings, for which the Editors sincerely apologise to the authors and the community. Nader Saffari, Mike Lowe and Alain Lhémery

  8. Gut Microbiome of an 11th Century A.D. Pre-Columbian Andean Mummy

    PubMed Central

    Santiago-Rodriguez, Tasha M.; Fornaciari, Gino; Luciani, Stefania; Dowd, Scot E.; Toranzos, Gary A.; Marota, Isolina; Cano, Raul J.

    2015-01-01

    The process of natural mummification is a rare and unique process from which little is known about the resulting microbial community structure. In the present study, we characterized the microbiome of paleofeces, and ascending, transverse and descending colon of an 11th century A.D. pre-Columbian Andean mummy by 16S rRNA gene high-throughput sequencing and metagenomics. Firmicutes were the most abundant bacterial group, with Clostridium spp. comprising up to 96.2% of the mummified gut, while Turicibacter spp. represented 89.2% of the bacteria identified in the paleofeces. Microbiome profile of the paleofeces was unique when compared to previously characterized coprolites that did not undergo natural mummification. We identified DNA sequences homologous to Clostridium botulinum, Trypanosoma cruzi and human papillomaviruses (HPVs). Unexpectedly, putative antibiotic-resistance genes including beta-lactamases, penicillin-binding proteins, resistance to fosfomycin, chloramphenicol, aminoglycosides, macrolides, sulfa, quinolones, tetracycline and vancomycin, and multi-drug transporters, were also identified. The presence of putative antibiotic-resistance genes suggests that resistance may not necessarily be associated with a selective pressure of antibiotics or contact with European cultures. Identification of pathogens and antibiotic-resistance genes in ancient human specimens will aid in the understanding of the evolution of pathogens as a way to treat and prevent diseases caused by bacteria, microbial eukaryotes and viruses. PMID:26422376

  9. Remembering September 11th: the role of retention interval and rehearsal on flashbulb and event memory.

    PubMed

    Shapiro, Lauren R

    2006-02-01

    Retention interval and rehearsal effects on flashbulb and event memory for 11th September 2001 (9/11) were examined. In Experiment 1, college students were assessed three times (Groups 1 and 2) or once (Group 3) over 11 weeks. In Experiment 2, three new groups assessed initially at 23 weeks (Group 4), 1 year (Group 5), or 2 years (Group 6) were compared at 1 year and at 2 years with subsamples of those assessed previously. No effects of retention interval length or rehearsal were found for flashbulb memory, which contained details at each assessment. Event memory, but not consistency, was detrimentally affected by long retention intervals, but improved with rehearsal. Recall was higher for the reception event than for the main events. Also, consistency from 1 day to 11 weeks, but not 1 year to 2 years, was higher for flashbulb memory than for event memory. Event recall was enhanced when respondents conceived of their memory as vivid, frozen, and encompassing a longer period of time. Positive correlations were found for event memory with confidence in accuracy and with rehearsal through discussion at 2 years.

  10. Examining Scientific and Technical Writing Strategies in the 11th Century Chinese Science Book "Brush Talks from Dream Brook"

    ERIC Educational Resources Information Center

    Zhang, Yuejiao

    2013-01-01

    This article examines the influential Chinese science book "Brush Talks from Dream Brook," written by Shen Kuo in the 11th century. I suggest that "Brush Talks" reveals a tension between institutionalized science and science in the public, and a gap between the making of scientific knowledge and the communication of such…

  11. The Effects of Cardio-Syntactic Analysis Instruction on Writing Scores in a 11th Grade High School Classroom

    ERIC Educational Resources Information Center

    Kariuki, Patrick N.; Blair, Paul W.

    2015-01-01

    The purpose of this research was to determine the effects of Cardio-Syntactic Analysis instruction on writing scores in an 11th grade English class. The sample consisted of 35 students enrolled in an Honor's English 11 class at Volunteer high School, in Church Hill, TN. The class was randomly assigned into an experimental group of 17 students and…

  12. FINAL TECHNICAL REPORT: Request for support of the 11th Workshop on the Physics of Dusty Plasmas

    SciTech Connect

    Edward Thomas

    2009-05-21

    This grant supported the publication of student papers that were presented at the 11th Workshop on the Physics of Dusty Plasmas. Papers were published in a Special Issue of the IEEE Transactions on Plasma Science, Vol. 32, Issue 2 in April, 2007.

  13. Using ARCS Model to Promote 11th Graders' Motivation and Achievement in Learning about Acids and Bases

    ERIC Educational Resources Information Center

    Feng, Sung-Lin; Tuan, Hsiao-Lin

    2005-01-01

    The purposes of this study are: to apply the ARCS model in designing an acid and bases unit, and to assess a single class of 11th graders for motivation and achievement outcomes before and after ARCS instruction. Four essential strategies for designing motivation instruction in the ARCS model were: Attention, Relevance, Confidence, and…

  14. Your Reading: An Annotated Booklist for Middle School and Junior High. 11th Edition. NCTE Bibliography Series.

    ERIC Educational Resources Information Center

    Brown, Jean E., Ed.; Stephens, Elaine C., Ed.

    Organized around the theme of "challenges," the 11th edition of "Your Reading" offers annotations of more than 1,200 books for young adults. Intended for teachers, librarians, parents, and students, this booklist presents recently published books that can be read for many purposes--for sheer enjoyment of the story, to pique…

  15. 1.56 µm 1 watt single frequency semiconductor disk laser.

    PubMed

    Rantamäki, Antti; Rautiainen, Jussi; Sirbu, Alexei; Mereuta, Alexandru; Kapon, Eli; Okhotnikov, Oleg G

    2013-01-28

    A single frequency wafer-fused semiconductor disk laser at 1.56 µm with 1 watt of output power and a coherence length over 5 km in fiber is demonstrated. The result represents the highest output power reported for a narrow-line semiconductor disk laser operating at this spectral range. The study shows the promising potential of the wafer fusion technique for power scaling of single frequency vertical-cavity lasers emitting in the 1.3-1.6 µm range.

  16. Adherence to HIV medications in a cohort of men who have sex with men: impact of September 11th.

    PubMed

    Halkitis, Perry N; Kutnick, Alexandra H; Rosof, Elana; Slater, Simon; Parsons, Jeffrey T

    2003-03-01

    Adherence to highly active antiretroviral therapy (HAART) regimens remains a challenge for people living with human immunodeficiency virus (HIV). Severe traumas like that of September 11, 2001, can exacerbate the difficulties already associated with adherence. A community-based sample of 68 HIV-seropositive men who have sex with men (MSM) living in New York City who were on protease inhibitor HAART regimens completed quantitative assessments to examine adherence in the aftermath of September 11th. Data were drawn from a larger study of drug use and HIV medication adherence. Assessments conducted from September 24, 2001 to October 24, 2001 were compared to assessments taken 2-4 months prior to September 11th. Repeated measures analyses of variance were used to analyze the number of missed and suboptimal doses (doses taken outside the prescribed time by +/-4 hours) reported in the 2 weeks prior to each respective assessment. The results indicated a significant increase in the number of missed doses and the number of suboptimal doses immediately after the events of September 11th. Differences in adherence were not influenced, however, by sociodemographic characteristics. These results suggest that the events of September 11th had an impact on adherence to HIV medications among MSM in New York City and provide further support for the notion that the events of September 11th may have adversely impacted the lives of seropositive individuals. Attention should be paid by clinicians working with HIV-positive individuals on how this event has been incorporated into lives of individuals already burdened by a chronic and demanding disease.

  17. Development of a ruggedized 20-watt, 2.3- gigahertz transistor

    NASA Technical Reports Server (NTRS)

    1973-01-01

    This program was to develop a ruggedized transistor capable of meeting the following CW objectives at 2.3 gigahertz: a power output of 20 watts, a power gain of 6 db, and an efficiency of 40 percent. Devices developed produced the following CW performance at 2.3 gigahertz: a power output of 23 watts, a power gain of 7.7 db, and an efficiently of 40.0 percent. This performance was achieved with an eight-cell TA8407 transistor design having the following modifications: a thin pellet, high-frequency diffusion, high-level emitter ballasting, an optimized emitter-bonding configuration for uniform power sharing, and a package that provides for some internal matching through the use of distributed line techniques.

  18. Assessment of China's Energy-Saving and Emission-Reduction Accomplishments and Opportunities During the 11th Five Year Plan

    SciTech Connect

    Levine, Mark D.; Price, Lynn; Zhou, Nan; Fridley, David; Aden, Nathaniel; Lu, Hongyou; McNeil, Michael; Zheng, Nina; Yining, Qin; Yowargana, Ping

    2010-04-28

    During the period 1980 to 2002, China experienced a 5% average annual reduction in energy consumption per unit of gross domestic product (GDP). The period 2002-2005 saw a dramatic reversal of the historic relationship between energy use and GDP growth: energy use per unit of GDP increased an average of 3.8% per year during this period (NBS, various years). China's 11th Five Year Plan (FYP), which covers the period 2006-2010, required all government divisions at different levels to reduce energy intensity by 20% in five years in order to regain the relationship between energy and GDP growth experienced during the 1980s and 1990s. This report provides an assessment of selected policies and programs that China has instituted in its quest to fulfill the national goal of a 20% reduction in energy intensity by 2010. The report finds that China has made substantial progress toward its goal of achieving 20% energy intensity reduction from 2006 to 2010 and that many of the energy-efficiency programs implemented during the 11th FYP in support of China's 20% energy/GDP reduction goal appear to be on track to meet - or in some cases even exceed - their energy-saving targets. It appears that most of the Ten Key Projects, the Top-1000 Program, and the Small Plant Closure Program are on track to meet or surpass the 11th FYP savings goals. China's appliance standards and labeling program, which was established prior to the 11th FYP, has become very robust during the 11th FYP period. China has greatly enhanced its enforcement of new building energy standards but energy-efficiency programs for buildings retrofits, as well as the goal of adjusting China's economic structure to reduce the share of energy consumed by industry, do not appear to be on track to meet the stated goals. With the implementation of the 11th FYP now bearing fruit, it is important to maintain and strengthen the existing energy-saving policies and programs that are successful while revising programs or adding new

  19. PREFACE: 11th International Workshop on Positron and Positronium Chemistry (PPC-11)

    NASA Astrophysics Data System (ADS)

    Pujari, P. K.; Sudarshan, K.; Dutta, D.

    2015-06-01

    The International Workshop on Positron and Positronium Chemistry (PPC) is a prestigious triennial conference series with a rich history. The 11th meeting in the series (PPC-11) was held at Cidade de Goa, Goa, India during 9-14, November, 2014. It was organized by Bhabha Atomic Research Centre (BARC), Mumbai. The co-organizers were Saha Institute of Nuclear Physics (SINP), Kolkata, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam and Indian Association of Nuclear Chemists and Allied Scientists (IANCAS), Mumbai. PPC-11 attracted participants both from academic institutions and industries. About 120 participants from 20 countries representing all continents participated in the conference. The conference continued the tradition of excellence in terms of quality of presentations and discussions. There were 33 plenary and invited talks, 39 oral presentations and 40 posters. The conference stood true to its multidisciplinary tag with papers presented in the fields of fundamentals of positron and positronium chemistry, applications in polymers, porous materials, metals/alloys, studies in liquids, biological applications as well as developments in theory and experimental techniques. The enthusiastic participation of senior researchers and young students made the scientific program a grand success. In order to encourage the student participants (twenty) and promote excellence, a committee of senior members evaluated their presentations and the top three contributions were awarded. The positron and positronium community paid homage to the memory of late Profs. J. Kristiak and A.T. Stewart. A brief sketch of their life and work was presented by Profs. Jan Kuriplach and Toshio Hyodo, respectively. All the papers published in these proceedings have been peer reviewed by the participants of PPC-11. Editors thank all the reviewers for sparing their valuable time and helping us in bringing out the proceedings with 43 contributed articles in the scheduled time. We are

  20. A 20 GHz, 70 watt, 48 percent efficient space communications TWT

    NASA Astrophysics Data System (ADS)

    McDermott, M. A.; Tamashiro, R. N.

    A space qualifiable helix traveling wave tube capable of producing saturated output power levels above 70 watts at 48 percent total efficiency has been developed for 20 GHz satellite communications systems. The design approach stresses high reliability consistent with high power and efficiency. Advanced construction features incorporated into the design are a five stage collector, an M-type dispenser cathode, and a dynamic velocity tapered (DVT) helix.

  1. Self-enhancement among high-exposure survivors of the September 11th terrorist attack: resilience or social maladjustment?

    PubMed

    Bonanno, George A; Rennicke, Courtney; Dekel, Sharon

    2005-06-01

    The authors examined self-enhancing bias as a predictor of adjustment among individuals in or near the World Trade Center during the September 11, 2001, terrorist attacks. Resilience was defined from categorical and continuous analyses of both participant self-report and friend and relative ratings of adjustment. Self-enhancement was associated with a resilient outcome, ratings of better adjustment prior to September 11th, greater positive affect, and reduced perceptions of social constraints. Additional analyses indicated that self-enhancers' reduced symptom levels were fully mediated by their low perceived social constraints. However, consistent with previous evidence suggesting a social cost to self-enhancement, at 18 months post-September 11th, self-enhancers' friends and relatives also rated them as decreasing in social adjustment and as being less honest.

  2. ORNL Trusted Corridors Project: Watts Bar Dam Inland Waterway Project

    SciTech Connect

    Walker, Randy M; Gross, Ian G; Smith, Cyrus M; Hill, David E

    2011-11-01

    Radiation has existed everywhere in the environment since the Earth's formation - in rocks, soil, water, and plants. The mining and processing of naturally occurring radioactive materials for use in medicine, power generation, consumer products, and industry inevitably generate emissions and waste. Radiological measuring devices have been used by industry for years to measure for radiation in undesired locations or simply identify radioactive materials. Since the terrorist attacks on the United States on 9-11-01 these radiation measuring devices have proliferated in many places in our nation's commerce system. DOE, TVA, the Army Corps and ORNL collaborated to test the usefulness of these devices in our nation's waterway system on this project. The purpose of the Watts Bar Dam ORNL Trusted Corridors project was to investigate the security, safety and enforcement needs of local, state and federal government entities for state-of-the-art sensor monitoring in regards to illegal cargo including utilization of the existing infrastructure. TVA's inland waterways lock system is a recognized and accepted infrastructure by the commercial carrier industry. Safety Monitoring activities included tow boat operators, commercial barges and vessels, recreational watercraft and their cargo, identification of unsafe vessels and carriers, and, monitoring of domestic and foreign commercial vessels and cargo identification. Safety Enforcement activities included cargo safety, tracking, identification of hazardous materials, waterway safety regulations, and hazardous materials regulations. Homeland Security and Law Enforcement Applications included Radiological Dispersive Devices (RDD) identification, identification of unsafe or illicit transport of hazardous materials including chemicals and radiological materials, and screening for shipments of illicit drugs. In the Fall of 2005 the SensorNet funding for the project expired. After several unsuccessful attempts to find a Federal sponsor

  3. Estimating the Effects of September 11th and Other Forms of Violence on the Mental Health and Social Development of New York City's Youth: A Matter of Context

    ERIC Educational Resources Information Center

    Aber, J. Lawrence; Gershoff, Elizabeth T.; Ware, Angelica; Kotler, Jennifer A.

    2004-01-01

    This longitudinal study examines the effects of exposure to the terrorist attack of September 11th as well as exposure to other forms of community violence on change in the mental health and social attitudes of youths in New York City. Three quarters of the youths reported some form of direct exposure to the events of September 11th, and 80%…

  4. Psychological sequelae of remote exposure to the September 11th terrorist attacks in Canadians with and without panic.

    PubMed

    Asmundson, Gordon J G; Carleton, R Nicholas; Wright, Kristi D; Taylor, Steven

    2004-01-01

    The purpose of the present investigation was to examine the psychological impact of remote exposure to the events and aftermath of the terrorist attacks in the USA on September 11th, 2001, and to assess what differences, if any, exist between individuals classified with probable panic disorder and those without. Telephone interviews were conducted with 122 residents of the capital city of the Canadian prairie province of Saskatchewan in spring 2002 in order to gather information regarding current mood, fears and avoidance behaviours as well as current post-traumatic stress disorder symptoms specific to September 11th. Consistent with previous findings and despite the remote nature of exposure, results indicated that the psychological well-being and behaviour of participants with probable panic disorder was more adversely affected by the events and aftermath of September 11th than those without panic disorder. These results suggest that remote viewing of traumatic events can have a significant and lingering impact on psychological well-being and behaviour and that these effects are more pronounced in those with panic disorder. Implications of the findings and future research directions are discussed.

  5. How China achieved its 11th Five-Year Plan emissions reduction target: A structural decomposition analysis of industrial SO2 and chemical oxygen demand.

    PubMed

    Liu, Qiaoling; Wang, Qi

    2017-01-01

    To curb the increasing pollutant emissions that have accompanied rapid economic growth, China implemented a mandatory emissions control system since the 11th Five-Year Plan (FYP) period, and the emission reduction targets have been met and even exceeded. This article explores how China achieved its emissions reduction targets by systematically identifying the main emission reduction pathways, including both the environmental and economic factors, and evaluates the contribution of each factor using structure decomposition analysis. A study of the two key controlled pollutants, industrial sulfur dioxide (SO2) and chemical oxygen demand (COD), during the 11th FYP period showed that (i) changes in the end-of-pipe treatment and pollutant generation coefficient were the dominant contributors to emissions reduction. The power and metal smelting sectors played important roles in SO2 abatement, while the paper products and food products sectors were important in COD reduction; (ii) changes to the input coefficient increased overall emissions although there was a decrease in SO2 emissions in 2007-2010 mainly due to input structure improvements in the construction sector; (iii) the trade effect largely offset the domestic emission reduction effects, although the trade effect declined during the study period; (iv) domestic demand was the main factor increasing domestic emissions; domestic investment changes (especially in the construction sector) were the major contributor to increases in SO2 emissions, and final consumption changes (especially consumption in the food production sector) were the main contributor to the increase in COD emissions. The results yield important implications for China's pollution emissions control policies.

  6. PREFACE: 11th International Conference on Damage Assessment of Structures (DAMAS 2015)

    NASA Astrophysics Data System (ADS)

    Wahab, M. A.

    2015-07-01

    This volume contains the proceedings of the 11th International Conference on Damage Assessment of Structures (DAMAS) 2015. DAMAS has a long history of almost 20 years. The first DAMAS conference took place in 1995 (Pescara, Italy), followed by a biannual meeting in 1997 (Sheffield, UK), 1999 (Dublin, Ireland), 2001 (Cardiff, UK), 2003 (Southampton, UK), 2005 (Gdansk, Poland), 2007 (Torino, Italy), 2009 (Beijing, China), 2011 (Oxford, UK) and 2013 (Dublin, Ireland). The eleventh edition of DAMAS conference series, DAMAS 2015, is hosted by Ghent University, Belgium, and is held at the congress center Het Pand in Ghent city. Ghent is the capital and the largest city of the East Flanders province of the Flemish region of Belgium. Het Pand is the culture and congress center of Ghent University and is a historical monument. The conference is established as a major international forum for research topics relevant to damage assessment of engineering structures and systems including numerical simulations, signal processing of sensor measurements and theoretical techniques as well as experimental case studies. The presentations of DAMAS 2015 are divided into 6 main sessions, namely 1) Structural Health and Condition Monitoring, 2) Damage in Civil Engineering, 3) Damage in Machineries, 4) Damage in Composite Materials, 5) Sensing and Sensors and 6) Signal Processing. The organising committee is grateful to keynote speakers; Professor Guido De Roeck, Head of Structural Mechanics Division, KULeuven, Belgium, for his keynote lecture entitled 'Structural Health Monitoring: highlights and challenges', Professor Weidong Zhu, Department of Mechanical Engineering, University of Maryland, USA, for his keynote lecture entitled 'Vibration-based Structural Damage Detection: Theory and Applications' and Professor Wieslaw Ostachowicz, Head of the Laboratory of Active Materials and Smart Structures, Polish Academy of Sciences, Poland, for his keynote lecture entitled 'Damage Assessment and

  7. PREFACE 11th Europhysical Conference on Defects in Insulating Materials (EURODIM 2010)

    NASA Astrophysics Data System (ADS)

    Kovács, László; Corradi, Gábor

    2010-11-01

    The Europhysical Conference on Defects in Insulating Materials, organized in the period 12-16 July 2010 in Pécs, Hungary by the Research Institute for Solid State Physics and Optics, Budapest and the Institute of Physics of the University of Pécs, was the 11th European conference in the alternate series of EURODIM and ICDIM. The first meeting in Argonne, USA in 1956 was dedicated to the field of color centers in alkali halide crystals. Since then the topic has been gradually extended to the real structure of oxides, halides, nitrides and other more complex insulators, and also to less ordered materials like glasses, ceramics and low-dimensional systems, as well as applications e.g. in radiology, non-linear optics, photonics and electronics. Recently the field covered includes the research and technology of defect-related phenomena in crystalline and amorphous wide band-gap bulk, layered and nano-materials. More than 200 colleagues from 31 countries in Europe, Asia, Africa and the Americas have participated in the conference. The program contained in addition to seven invited and three keynote talks 67 further oral presentations as well as some 200 poster contributions. The city of Pécs, a pearl of the Southern Danubia region, was proud of hosting the conference as one of the 2010 European Capitals of Culture, this status crowning a long urban history dating back to paleochristian times in the Roman province Pannonia. On behalf of the Organizing Committee signature László Kovács Conference Chair Conference Chair László Kovács Crystal Physics Department Research Institute for Solid State Physics and Optics Budapest, Hungary e-mail: eurodim2010@optics.szfki.kfki.hu Program Committee Gábor Corradi (Hungary) István Földvári (Hungary) Rob A. Jackson (UK) László Kovács (Hungary) Martin Nikl (Czech Republic) Anna Vedda (Italy) Andrea Watterich (Hungary) International Advisory Committee M.G. Blanchin (France)A. Lushchik (Estonia) F. Bridges (USA

  8. PREFACE: 11th International Conference on Electrorheological Fluids and Magnetorheological Suspensions

    NASA Astrophysics Data System (ADS)

    Odenbach, Stefan; Borin, Dmitry

    2009-07-01

    Materials with properties controllable by external fields become more and more important for modern product design. Magnetorheological suspensions, electrorheological fluids and ferrofluids are classical examples for such smart materials exhibiting magnetic or electric field dependent properties. Their development over the past 60 years has shown how complex research and development of fluids with tailored properties can be. The demands of potential applications are the driving force for the synthesis of new fluids. The changes in the synthetic process and the composition of the fluids based on an increasing understanding of the relevant microscopic processes leads to certain macroscopic properties of the material. Only intense cooperation between basic and application oriented research, synthesis, characterisation, theory and application design can finally lead to fluids suitable for the envisaged use. The International Conferences on Electrorheological Fluids and Magnetorheological Suspensions have provided over more than 20 years a platform for interdisciplinary discussions strengthening the scientific progress in the field. Besides being a forum for scientific exchange about recent developments in electro- and magnetorheological fluids. The 11th International Conference on Electrorheological Fluids and Magnetorheological Suspensions (ERMR08) which has been organized by the chair of Magnetofluiddynamics at the Technische Universität Dresden in August 2008 in Dresden has continued this fruitful tradition. With more than 180 participants from 24 different countries it has been the largest ERMR meeting during the last decade - a tendency showing the high potential and promising development of the field of electrically and magnetically controllable fluids. A significant proportion of the participants were PhD students, a fact that also highlights the sustainability of the field. In total 85 oral presentations - including 8 plenary talks - and 81 posters were

  9. Automatic Generation of Remote Visualization Tools with WATT

    NASA Astrophysics Data System (ADS)

    Jensen, P. A.; Bollig, E. F.; Yuen, D. A.; Erlebacher, G.; Momsen, A. R.

    2006-12-01

    The ever increasing size and complexity of geophysical and other scientific datasets has forced developers to turn to more powerful alternatives for visualizing results of computations and experiments. These alternative need to be faster, scalable, more efficient, and able to be run on large machines. At the same time, advances in scripting languages and visualization libraries have significantly decreased the development time of smaller, desktop visualization tools. Ideally, programmers would be able to develop visualization tools in a high-level, local, scripted environment and then automatically convert their programs into compiled, remote visualization tools for integration into larger computation environments. The Web Automation and Translation Toolkit (WATT) [1] converts a Tcl script for the Visualization Toolkit (VTK) [2] into a standards-compliant web service. We will demonstrate the used of WATT for the automated conversion of a desktop visualization application (written in Tcl for VTK) into a remote visualization service of interest to geoscientists. The resulting service will allow real-time access to a large dataset through the Internet, and will be easily integrated into the existing architecture of the Virtual Laboratory for Earth and Planetary Materials (VLab) [3]. [1] Jensen, P.A., Yuen, D.A., Erlebacher, G., Bollig, E.F., Kigelman, D.G., Shukh, E.A., Automated Generation of Web Services for Visualization Toolkits, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract IN42A-06, 2005. [2] The Visualization Toolkit, http://www.vtk.org [3] The Virtual Laboratory for Earth and Planetary Materials, http://vlab.msi.umn.edu

  10. Multi-Watt Small Radioisotope Thermoelectric Generator Conceptual Design Study

    NASA Astrophysics Data System (ADS)

    Determan, William R.; Otting, William; Frye, Patrick; Abelson, Robert; Ewell, Richard; Miyake, Bob; Synder, Jeff

    2007-01-01

    A need has been identified for a small, light-weight, reliable power source using a radioisotope heat source, to power the next generation of NASA's small surface rovers and exploration probes. Unit performance, development costs, and technical risk are key criteria to be used to select the best design approach. Because safety can be a major program cost and schedule driver, RTG designs should utilize the DOE radioisotope safety program's data base to the maximum extent possible. Other aspects important to the conceptual design include: 1) a multi-mission capable design for atmospheric and vacuum environments, 2) a module size based on one GPHS Step 2 module, 3) use of flight proven thermoelectric converter technologies, 4) a long service lifetime of up to 14 years, 5) maximize unit specific power consistent with all other requirements, and 6) be ready by 2013. Another critical aspect of the design is the thermal integration of the RTG with the rover or probe's heat rejection subsystem and the descent vehicle's heat rejection subsystem. This paper describes two multi-watt RTG design concepts and their integration with a MER-class rover.

  11. 47 CFR 95.855 - Transmitter effective radiated power limitation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Transmitter effective radiated power limitation. The effective radiated power (ERP) of each CTS and RTU shall... with an ERP exceeding 20 watts. No mobile RTU may transmit with an ERP exceeding 4 watts....

  12. 47 CFR 95.855 - Transmitter effective radiated power limitation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Transmitter effective radiated power limitation. The effective radiated power (ERP) of each CTS and RTU shall... with an ERP exceeding 20 watts. No mobile RTU may transmit with an ERP exceeding 4 watts....

  13. 47 CFR 95.855 - Transmitter effective radiated power limitation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Transmitter effective radiated power limitation. The effective radiated power (ERP) of each CTS and RTU shall... with an ERP exceeding 20 watts. No mobile RTU may transmit with an ERP exceeding 4 watts....

  14. 47 CFR 95.855 - Transmitter effective radiated power limitation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Transmitter effective radiated power limitation. The effective radiated power (ERP) of each CTS and RTU shall... with an ERP exceeding 20 watts. No mobile RTU may transmit with an ERP exceeding 4 watts....

  15. 47 CFR 95.855 - Transmitter effective radiated power limitation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Transmitter effective radiated power limitation. The effective radiated power (ERP) of each CTS and RTU shall... with an ERP exceeding 20 watts. No mobile RTU may transmit with an ERP exceeding 4 watts....

  16. PREFACE: 11th International Conference on Nucleus-Nucleus Collisions (NN2012)

    NASA Astrophysics Data System (ADS)

    Li, Bao-An; Natowitz, Joseph B.

    2013-03-01

    The 11th International Conference on Nucleus-Nucleus Collisions (NN2012) was held from 27 May to 1 June 2012, in San Antonio, Texas, USA. It was jointly organized and hosted by The Cyclotron Institute at Texas A&M University, College Station and The Department of Physics and Astronomy at Texas A&M University-Commerce. Among the approximately 300 participants were a large number of graduate students and post-doctoral fellows. The Keynote Talk of the conference, 'The State of Affairs of Present and Future Nucleus-Nucleus Collision Science', was given by Dr Robert Tribble, University Distinguished Professor and Director of the TAMU Cyclotron Institute. During the conference a very well-received public lecture on neutrino astronomy, 'The ICEcube project', was given by Dr Francis Halzen, Hilldale and Gregory Breit Distinguished Professor at the University of Wisconsin, Madison. The Scientific program continued in the general spirit and intention of this conference series. As is typical of this conference a broad range of topics including fundamental areas of nuclear dynamics, structure, and applications were addressed in 42 plenary session talks, 150 parallel session talks, and 21 posters. The high quality of the work presented emphasized the vitality and relevance of the subject matter of this conference. Following the tradition, the NN2012 International Advisory Committee selected the host and site of the next conference in this series. The 12th International Conference on Nucleus-Nucleus Collisions (NN2015) will be held 21-26 June 2015 in Catania, Italy. It will be hosted by The INFN, Laboratori Nazionali del Sud, INFN, Catania and the Dipartimento di Fisica e Astronomia of the University of Catania. The NN2012 Proceedings contains the conference program and 165 articles organized into the following 10 sections 1. Heavy and Superheavy Elements 2. QCD and Hadron Physics 3. Relativistic Heavy-Ion Collisions 4. Nuclear Structure 5. Nuclear Energy and Applications of

  17. Is the 10th and 11th Intercostal Space a Safe Approach for Percutaneous Nephrostomy and Nephrolithotomy?

    SciTech Connect

    Muzrakchi, Ahmed Al; Szmigielski, W. Omar, Ahmed J.S.; Younes, Nagy M.

    2004-09-15

    The aim of this study was to determine the rate of complications in percutaneous nephrostomy (PCN) and nephrolithotomy (PCNL) performed through the 11th and 10th intercostal spaces using our monitoring technique and to discuss the safety of the procedure. Out of 398 PCNs and PCNLs carried out during a 3-year period, 56 patients had 57 such procedures performed using an intercostal approach. The 11th intercostal route was used in 42 and the 10th in 15 cases. One patient had two separate nephrostomies performed through the 10th and 11th intercostal spaces. The technique utilizes bi-planar fluoroscopy with a combination of a conventional angiographic machine to provide anterior-posterior fluoroscopy and a C-arm mobile fluoroscopy machine to give a lateral view, displayed on two separate monitors. None of the patients had clinically significant thoracic or abdominal complications. Two patients had minor chest complications. Only one developed changes (plate atelectasis, elevation of the hemi-diaphragm) directly related to the nephrostomy (2%). The second patient had bilateral plate atelectasis and unilateral congestive lung changes after PCNL. These changes were not necessarily related to the procedure but rather to general anesthesia during nephrolithotomy. The authors consider PCN or PCNL through the intercostal approach a safe procedure with a negligible complication rate, provided that it is performed under bi-planar fluoroscopy, which allows determination of the skin entry point just below the level of pleural reflection and provides three-dimensional monitoring of advancement of the puncturing needle toward the target entry point.

  18. Monolithic watt-level millimeter-wave diode-grid frequency tripler array

    NASA Technical Reports Server (NTRS)

    Hwu, R. J.; Luhmann, N. C., Jr.; Rutledge, D. B.; Hancock, B.; Lieneweg, U.

    1988-01-01

    In order to provide watt-level CW output power throughout the millimeter and submillimeter wave region, thousands of solid-state diodes have been monolithically integrated using a metal grid to produce a highly efficient frequency multiplier. Devices considered include GaAs Schottky diodes, thin MOS diodes, and GaAs Barrier-Intrinsic-N(+)diodes. The performance of the present compact low-cost device has been theoretically and experimentally validated.

  19. PREFACE: 11th IAEA Technical Meeting on H-mode Physics and Transport Barriers

    NASA Astrophysics Data System (ADS)

    Takizuka, Tomonori

    2008-07-01

    This volume of Journal of Physics: Conference Series contains papers based on invited talks and contributed posters presented at the 11th IAEA Technical Meeting on H-mode Physics and Transport Barriers. This meeting was held at the Tsukuba International Congress Center in Tsukuba, Japan, on 26-28 September 2007, and was organized jointly by the Japan Atomic Energy Agency and the University of Tsukuba. The previous ten meetings in this series were held in San Diego (USA) 1987, Gut Ising (Germany) 1989, Abingdon (UK) 1991, Naka (Japan) 1993, Princeton (USA) 1995, Kloster Seeon (Germany) 1997, Oxford (UK) 1999, Toki (Japan) 2001, San Diego (USA) 2003, and St Petersburg (Russia) 2005. The purpose of the eleventh meeting was to present and discuss new results on H-mode (edge transport barrier, ETB) and internal transport barrier, ITB, experiments, theory and modeling in magnetic fusion research. It was expected that contributions give new and improved insights into the physics mechanisms behind high confinement modes of H-mode and ITBs. Ultimately, this research should lead to improved projections for ITER. As has been the tradition at the recent meetings of this series, the program was subdivided into six topics. The topics selected for the eleventh meeting were: H-mode transition and the pedestal-width Dynamics in ETB: ELM threshold, non-linear evolution and suppression, etc Transport relations of various quantities including turbulence in plasmas with ITB: rotation physics is especially highlighted Transport barriers in non-axisymmetric magnetic fields Theory and simulation on transport barriers Projections of transport barrier physics to ITER For each topic there was an invited talk presenting an overview of the topic, based on contributions to the meeting and on recently published external results. The six invited talks were: A Leonard (GA, USA): Progress in characterization of the H-mode pedestal and L-H transition N Oyama (JAEA, Japan): Progress and issues in

  20. Selected scientific topics of the 11th International Isotope Symposium on the Synthesis and Applications of Isotopes and Isotopically Labeled Compounds.

    PubMed

    Atzrodt, Jens; Derdau, Volker

    2013-01-01

    This micro-review describes hot topics and new trends in isotope science discussed at the 11th International Isotope Symposium on the Synthesis and Applications of Isotopes and Isotopically Labeled Compounds from a personal perspective.

  1. Studies of the vicarious traumatization of college students by the September 11th attacks: effects of proximity, exposure and connectedness.

    PubMed

    Blanchard, Edward B; Kuhn, Eric; Rowell, Dianna L; Hickling, Edward J; Wittrock, David; Rogers, Rebecca L; Johnson, Michelle R; Steckler, Debra C

    2004-02-01

    From mid-October 2001 through the end of November 2001, we collected fairly large sets of questionnaires from undergraduates at three public universities (Albany, NY, n = 507, Augusta, GA, n = 336, Fargo, ND, n = 526 ) to assess rate of acute stress disorder (ASD) and level of ASD symptoms following the September 11th attacks, rate of current posttraumatic stress disorder (PTSD) and level of PTSD symptoms, and current level of depressive symptoms resulting from the September 11th attacks. We also gathered information on exposure to media coverage of the attacks, connectedness to the World Trade Center (WTC) and personnel there, and degree of engagement in reparative acts such as giving blood, attending vigils. We found higher levels of ASD, ASD symptoms, PTSD and PTSD symptoms as a function of geographical proximity to New York City (and within the Albany site, proximity of students' homes) and gender. Exposure (hours of TV watched) was a predictor in some instances as was connectedness to WTC victims. ASD symptoms were the strongest predictor of subsequent PTSD symptoms. Path models accounted for over 60% of the variance in PTSD symptoms.

  2. Kent and Riegel's Handbook of industrial chemistry and biotechnology. 11th ed.

    SciTech Connect

    Kent, James A.

    2007-07-01

    This handbook provides extensive information on plastics, rubber, adhesives, textile fibers, pharmaceutical chemistry, synthetic organic chemicals, soaps and detergents, as well as various other major classes of industrial chemistry. There is detailed coverage of coal utilization technology, dyes and dye intermediates, chlor-alkali and heavy chemicals, paints and pigments, chemical explosives, propellants, petroleum and petrochemicals, natural gas, industrial gases, synthetic nitrogen products, fats and oils, sulfur and sulfuric acid, phosphorous and phosphates, wood products, and sweeteners. The chapter on coal is entitled: coal technology for power, liquid fuels and chemicals. 100 ills.

  3. Stable 1.25 watts CW far infrared laser radiation at the 119 micron methanol line

    NASA Technical Reports Server (NTRS)

    Farhoomand, Jam; Pickett, Herbert M.

    1987-01-01

    Far-infrared CW radiation of 1.25 watts has been obtained at the 119 micron methanol line with a CO2 pump power of 125 watts, and the maximum frequency fluctuation of the free running laser is measured to be less than + or - 100 kHz per hour. Reflecting optics have been used, when possible, to minimize CO2 degradation, and the frequency stability is ensured by cooling the input and output couplers. The input and output assemblies within the lasing medium are enclosed to minimize the external effects on the cavity length and to eliminate the mechanical instabilities associated with the use of bellows. The vibrational bottle-neck is broken by cooling the resonator wall to 5 deg and adding He as the buffer gas.

  4. EDITORIAL: Special issue featuring articles arising from the 11th High-Tech Plasma Processes Conference Special issue featuring articles arising from the 11th High-Tech Plasma Processes Conference

    NASA Astrophysics Data System (ADS)

    Bruggeman, Peter; Degrez, Gérard; Delplancke, Marie-Paule; Gleizes, Alain

    2011-05-01

    The 11th High-Tech Plasma Processes Conference (HTPP) was held in Brussels, Belgium, 27 June-2 July, 2010. HTPP started as a thermal plasma conference and gradually expanded to include low-temperature plasmas. The conference was founded by Jacques Amouroux and Pierre Fauchais, and aims to bring together different scientific communities to facilitate contacts between science, technology and industry, providing a platform for the exploration of elementary processes and applications in and by plasmas. The first HTPP was held in Odeillo, France, in 1990. Since then it has been held every other year in different European cities: Paris, Aachen, Athens, Strasbourg, Saint-Petersburg, Patras and Brussels. The 11th HTPP conference was attended by 125 participants from 19 countries. The program involved 14 invited talks, 34 contributed talks, 72 posters and a software demonstration and hands-on session for plasma modelling. The 12th HTPP conference will be held 24-28 June 2012, in Bologna, Italy. A larger part of the contributions to the 11th HTPP has been published in the Journal of Physics: Conference Series (JPCS) volume 275, 2011. All invited speakers and other contributors, as selected by the Steering, Scientific and Organizing Committee, were invited to submit a paper based on their contributions for this special issue which is peer reviewed by the journal. Both this special issue and the JPCS volume aim to bring the 11th HTPP to a wider audience. The publications are a nice example of the broad topic range of the conference. The JPCS volume contains papers covering fundamental aspects on radiative processes of thermal plasmas, modelling of thermal arcs and non-thermal RF plasma jets, plasma diagnostics including flow and heat flux measurements of thermal plasmas, radical density measurements and laser-induced breakdown spectroscopy. The applications-oriented contributions of the JPCS volume include plasma spraying, synthesis of (nano-sized) materials, surface

  5. [Analysis on research projects for acupuncture and moxibustion supported by NSFC during the 11th 5-year-plan].

    PubMed

    Zhao, Chang-Long; Jing, Xiang-Hong; Li, Yu-Qing; Li, Liang; Rong, Pei-Jing; Wang, Chang-En

    2012-08-01

    In the present paper, the authors introduce the approved and finished research projects for acupuncture and moxibustion therapies supported by the National Natural Science Foundation of China (NSFC) during the 11th 5-year-plan. A total of 194 research projects were subsidized by NSFC from 2006 to 2010. These projects include 6 aspects: meridian-collaterals, acupoint theory, acupuncture analgesia, mechanisms underlying improvement of different clinical problems, clinical trials, and moxibustion therapy. The research on acupoints has been becoming a new hotspot in recent years. Majority of the research projects focus on the mechanism of acu-moxibustion underlying improvement of different clinical problems, while fewer projects on clinical trials. During the 11th 5-year-plan, 119 projects were completed; most of them involved meridian-collateral theory, acupoint theory, mechanism of acu-moxibustion underlying improvement of clinical problems and acupuncture manipulations. Following analysis of the finished research projects, we find that 1) many neurobiological methods and techniques are commonly used in the research on meridian-collateral theory; 2) the research on acupoint theory is changing from observing the local morphological structure to identifying characteristics of the regional activated receptors, particularly under the circumstances of visceral pathological conditions and efficacies of acupoints; 3) researches on the underlying mechanism of acu-moxibusiton for improving clinical disorders mainly focused on its cerebral protective effects against cerebral ischemia, in addition, researches about other diseases on clinical conditions have been also carried out, but the related mechanisms are far from understanding; 4) In many research projects, various new methods and techniques, such as fMRI, position emission tomography, genomics, proteomics, molecular biology, nerve stem cell, etc. were widely used; 5) Randomized controlled multi-center clinical trials are

  6. Enhanced capture of healthcare-related harms and injuries in the 11th revision of the International Classification of Diseases (ICD-11).

    PubMed

    Southern, Danielle A; Pincus, Harold A; Romano, Patrick S; Burnand, Bernard; Harrison, James; Forster, Alan J; Moskal, Lori; Quan, Hude; Droesler, Saskia E; Sundararajan, Vijaya; Colin, Cyrille; Gurevich, Yana; Brien, Susan E; Kostanjsek, Nenad; Üstün, Bedirhan; Ghali, William A

    2016-02-01

    The World Health Organization (WHO) plans to submit the 11th revision of the International Classification of Diseases (ICD) to the World Health Assembly in 2018. The WHO is working toward a revised classification system that has an enhanced ability to capture health concepts in a manner that reflects current scientific evidence and that is compatible with contemporary information systems. In this paper, we present recommendations made to the WHO by the ICD revision's Quality and Safety Topic Advisory Group (Q&S TAG) for a new conceptual approach to capturing healthcare-related harms and injuries in ICD-coded data. The Q&S TAG has grouped causes of healthcare-related harm and injuries into four categories that relate to the source of the event: (a) medications and substances, (b) procedures, (c) devices and (d) other aspects of care. Under the proposed multiple coding approach, one of these sources of harm must be coded as part of a cluster of three codes to depict, respectively, a healthcare activity as a 'source' of harm, a 'mode or mechanism' of harm and a consequence of the event summarized by these codes (i.e. injury or harm). Use of this framework depends on the implementation of a new and potentially powerful code-clustering mechanism in ICD-11. This new framework for coding healthcare-related harm has great potential to improve the clinical detail of adverse event descriptions, and the overall quality of coded health data.

  7. The 11th August 2009 Andaman earthquake (Mw 7.6): A plausible cause of its genesis

    NASA Astrophysics Data System (ADS)

    Mishra, O. P.; Ghosh, D.

    2009-12-01

    The occurrence of a strong sub-oceanic earthquake of Mw 7.6 at Centroid depth of about 20 km in the North Andaman Arc (Latitude: 14.096N; Longitude: 92.926) at 01:25:39 IST has created panic in the most parts of eastern and northern India. The genesis of this mainshock is very much intriguing from scientific point of view due to following reasons: i) The occurrence of the 11th August 2009 North Andaman Mainshock hypocenter (Mw 7.6) is related to the 2004 Sumatra - Andaman megathrust tsunamigenic mainshock (Mw 9.3) [here referred to as SAMTE 9.3] rupture zone that falls in very complicated tectonic settings of the North Andaman Arc where subduction complex and accretionary prism exist very near to the North Andaman trench. ii) The 11th August 2009 North Andaman Mainshock hypocenter (Mw 7.6) falls in the area of earlier demarcated seismically active zone by Geological Survey of India during extensive aftershock monitoring (2004 - 2005) of the SAMTE 9.3 as reported through a series of publications by GSI scientists e.g., Mishra et al., 2005 (GSI Special Publication); Mishra et al. 2006 (Bulletin Seismological Society of America Special Issue, U.S.A); Mishra et al., 2007 (Seismological Research Letters, U.S.A); Mishra and Ghosh, 2008 (Specl. Issue, Indian Minerals). The aftershocks of the 2004 mega-thrust earthquake also located at depths varying from 12 km to 20 km (sP-phase relocation method, Zhao and Mishra et al., 2002; Mishra et al., 2003) where the 11th August 2009 mainshock earthquake (Mw 7.6) rocked.It is, inferred that the 11th August 2009 Andaman earthquake occurred in the previous ruptured zones of the 2004 SAMTE 9.3. iii) The mainshock hypocenter is confined to the zone where north Andaman trench starts bending, which in turn indicates a stressed zone that might have triggered brittle failure by normal faulting. The brittle failure through normal faulting represents a down deep tension, which may be related to the tearing of the subducted Indian plate as

  8. Taking out one billion tones of carbon: the magic of China's 11thFive-Year Plan

    SciTech Connect

    Lin, Jiang; Zhou, Nan; Levine, Mark D.; Fridley, David

    2007-05-01

    China's 11th Five-Year Plan (FYP) sets an ambitious targetfor energy-efficiency improvement: energy intensity of the country sgross domestic product (GDP) should be reduced by 20 percent from 2005 to2010 (NDRC, 2006). This is the first time that a quantitative and bindingtarget has been set for energy efficiency, and signals a major shift inChina's strategic thinking about its long-term economic and energydevelopment. The 20 percent energy intensity target also translates intoan annual reduction of over one billion tons of CO2 by 2010, making theChinese effort one of most significant carbon mitigation effort in theworld today. While it is still too early to tell whether China willachieve this target, this paper attempts to understand the trend inenergy intensity in China and to explore a variety of options towardmeeting the 20 percent target using a detailed endues energymodel.

  9. ROAD BRIDGES IN MINAMI-SANRIKU WASHED AWAY IN THE MARCH 11th 2011 GREAT EAST JAPAN EARTHQUAKE AND TSUNAMI

    NASA Astrophysics Data System (ADS)

    Aglipay, Mary Roxanne I.; Konagai, Kazuo; Kyokawa, Hiroyuki; Keshab, Sharma

    On March 11th, 2011, Minami-Sanriku, located in the northeastern coast of Japan was severely inundated by the tsunami that followed the Great East Japan Earthquake on March 11, 2011. Road bridges near the coastlines in this area have been extensively damaged with their decks being overturned or carried over long distances. An attempt was made to deduce as rational scenarios as possible before remaining debris was cleaned up. Though the reasons for the washout of bridges can be many and complex, it is to be noted that bridge decks have hollows for the optimum light-weight solution, which fact eventually allowed the bridge decks to be carried over remarkable distances. Poor connection details and cavities, hollows between deck beams, are considered to have facilitated overturning due to uplift forces.

  10. Rapid Economic Growth and Natural Gas Consumption Nexus: Looking forward from Perspective of 11th Malaysian Plan

    NASA Astrophysics Data System (ADS)

    Bekhet, H. A.; Yasmin, T.

    2016-03-01

    The present study investigates the relationship between economic growth and energy consumption by incorporating CO2 emissions, natural gas consumption and population in Malaysia. Annual data and F-bound test and granger causality have applied to test the existence of long run relationship between the series. The results show that variables are cointegrated for long run relationship. The results also indicate that natural gas consumption is an important contributing factor to energy demand and hence economic growth in case of Malaysia. The causality analysis highlights that the feedback hypothesis exists between economic growth and energy consumption. While, conservative hypothesis is validated between natural gas consumption and economic growth which implies that economic growth will push natural gas consumption policies in future. This study opens up new direction for policy makers to formulate a comprehensive natural gas policy to sustain environment for long span of time in case to achieve 11th MP targets.

  11. Taking out 1 billion tons of CO2: The magic of China's 11th Five-Year Plan?

    SciTech Connect

    Zhou, Nan; Lin, Jiang; Zhou, Nan; Levine, Mark; Fridley, David

    2007-07-01

    China's 11th Five-Year Plan (FYP) sets an ambitious target for energy-efficiency improvement: energy intensity of the country's gross domestic product (GDP) should be reduced by 20% from 2005 to 2010 (NDRC, 2006). This is the first time that a quantitative and binding target has been set for energy efficiency, and signals a major shift in China's strategic thinking about its long-term economic and energy development. The 20% energy intensity target also translates into an annual reduction of over 1.5 billion tons of CO2 by 2010, making the Chinese effort one of most significant carbon mitigation effort in the world today. While it is still too early to tell whether China will achieve this target, this paper attempts to understand the trend in energy intensity in China and to explore a variety of options toward meeting the 20% target using a detailed end-use energy model.

  12. The Japanese version of the Barratt Impulsiveness Scale, 11th version (BIS-11): its reliability and validity.

    PubMed

    Someya, T; Sakado, K; Seki, T; Kojima, M; Reist, C; Tang, S W; Takahashi, S

    2001-04-01

    No instrument for assessing impulsiveness has been developed in Japan. After translating the Barratt Impulsiveness Scale 11th version (BIS-11) into Japanese, we investigated reliability and validity in student (n = 34) and worker (n = 416) samples. To assess test-retest reliability, the intraclass coefficient between test and retest was calculated in the student sample. Internal consistency was examined by calculating Cronbach's alpha in the worker sample. To see factor validity, we examined by confirmatory factor analysis whether the three-factor model, proposed by a previous report, fit the data. The results showed that the Japanese version of the BIS-11 had excellent test-retest reliability and acceptable internal consistency reliability. In addition, the Japanese version was judged to have similar factor structure to the original one. The Japanese version of the BIS-11 is a reliable and valid measure and has possible utility for assessing impulsiveness.

  13. Sensation seeking needs among 8th and 11th graders: characteristics associated with cigarette and marijuana use.

    PubMed

    Kopstein, A N; Crum, R M; Celentano, D D; Martin, S S

    2001-05-01

    This cross-sectional school-based study explored the relationship between adolescent use of cigarettes and marijuana and the sensation seeking personality factors of (1) Disinhibition and (2) Thrill and Adventure Seeking. The study population included a representative sample of both male and female 8th and 11th graders in the state of Delaware. Analytic methods utilized included correlational analysis and multivariate logistic regression. In the multivariate logistic regression models, the Disinhibition personality factor accounted for cigarette and marijuana using behaviors with odds ratios ranging between 2 and 3. Thrill and Adventure Seeking was not a significant explanatory variable in any of the final multivariate models. Potential confounders (age, gender and race) were considered in all analyses. Of all the two-way interactions assessed, none was significant. The findings from this study utilizing a large general community sample indicate that sensation seeking needs are a potential risk factor for adolescent substance use.

  14. Study of the 11th July, 1915, Portuguese offshore earthquake, in the Atlantic from contemporary seismograms and bulletins

    NASA Astrophysics Data System (ADS)

    Batllo-Ortiz, J.; Custodio, S.; Macia, R.; Teves-Costa, P.

    2012-12-01

    The seismicity rate in the contact of the Nubian and Euro-Asiatic plates along the Azores-Gibraltar region can be considered moderate. Nevertheless, large earthquakes do occur, as is well known from historical records. The sensibility of seismographic networks to earthquakes with oceanic origin has been extremely low until recent times. Oceanic M5 earthquakes have not been consistently recorded up to the second third of the XX century, precluding a proper knowledge of seismicity rates and other parameters of interest for earthquake hazard. Nevertheless, information for some events does exist, most of which remains to be properly studied. In this paper we analyze historical data for the 11th July, 1915 earthquake, which occurred offshore and was felt over the whole mainland Portugal. This event is one of the largest occurred during the instrumental period in the region of diffuse seismicity around the Gorringe bank. However it has been little studied, probably because it did not cause serious damage. The 11th July, 1915 earthquake is of great interest due to its size, estimated on the order of M6, and to its unique location with respect to the regions of large earthquakes in the Atlantic. In this paper, we present source parameters for this earthquake based on the analysis of the available contemporary seismograms and related documents. After throughout collection and selection, 23 seismograms obtained at 11 different European stations were digitized and processed. The event was relocated and its magnitude recalculated. Its focal mechanism has also been studied through waveform modeling and first motion polarity. We present the results of this analysis, compare the source of the 1915 earthquake with that of present earthquakes in the same region, and interpret the new results in light of the regional seismicity and seismo-tectonics.

  15. The effect of trade books on the environmental literacy of 11th and 12th graders in aquatic science

    NASA Astrophysics Data System (ADS)

    Lewis, Ann S.

    The purpose of this study was to compare the environmental literacy of 11th and 12th graders who participated in an eighteen-week environmental education program using trade books versus 11 th- and 12th-graders who participated in an eighteen-week, traditional environmental education program without the use of trade books. This study was conducted using a quasi-experimental research technique. Four high school aquatic science classes at two suburban high schools were used in the research. One teacher at each high school taught one control class and one experimental class of aquatic science. In the experimental classes, four trade books were read to the classes during the eighteen-week semester. These four books were selected by the participating teachers before the semester began. The books used were A Home by the Sea, Sea Otter Rescue, There's a Hair in My Dirt, and The Missing Gator of Gumbo Limbo. The instrument used to measure environmental literacy was the Children's Environmental Attitude and Knowledge Scale. This test was given at the beginning of the semester and at the end of the semester. The scores at the end of the semester were analyzed by 2 x 2 mixed model ANOVA with the teacher as the random effect and the condition (trade books) as the fixed effect. The statistical analysis of this study showed that the students in the experimental classes did not score higher than the control classes on the Children's Environmental Attitude and Knowledge Scale or on a subset of "water" questions. Several limitations were placed on this research. These limitations included the following: (1) a small number of classes and a small number of teachers, (2) change from the original plan of using environmental science classes to aquatic science classes, (3) possible indifference of the students, and (4) restrictive teaching strategies of the teachers.

  16. Performance of three-crystal 1800 watt CW Nd:YAG laser

    SciTech Connect

    Jellison, J.L.; Keicher, D.M.; Fuerschbach, P.W.

    1990-01-01

    The goal of this project was to develop a laser system that would combine some of the favorable characteristics of the two most commonly used lasers for seam welding of heat sensitive assemblies. A multirod (3) symmetrical resonator CW Nd:YAG laser has been developed that is rated at 1800 watts output power. By utilizing the symmetrical resonator design, beam characteristics are not significantly compromised compared to that of single rod systems. The laser is capable of producing acceptable welds in aluminum and copper alloys and also has sufficient power to produce welds in steels and nickel base alloys at high welding speeds. 4 refs., 5 figs. 1 tab.

  17. A 200 watt traveling wave-tube for the communications technology satellite

    NASA Technical Reports Server (NTRS)

    Jones, C. L.

    1976-01-01

    The results of the design, development, and test of experimental and production units of PPM focused traveling wave tube that produces 225 watts of CW RF power over 85 MHz centered at 12.080 GHz are presented. The tube uses a coupled cavity RF circuit with a velocity taper for greater than 26 percent basic efficiency. Overall efficiency of 50 percent is achieved by the incorporation of a multistage depressed collector designed at NASA Lewis Research Center. The collector is cooled by direct radiation to deep space. The tube was designed to be used for broadcasting power transmission from a satellite.

  18. Feasibility study of a 110 watt per kilogram lightweight solar array system

    NASA Technical Reports Server (NTRS)

    Shepard, N. F.; Stahle, C. V.; Hanson, K. L.; Schneider, A.; Blomstrom, L. E.; Hansen, W. T.; Kirpich, A.

    1973-01-01

    The feasibility of a 10,000 watt solar array panel which has a minimum power-to-mass ratio of 110 watt/kg is discussed. The application of this ultralightweight solar array to three possible missions was investigated. With the interplanetary mission as a baseline, the constraining requirements for a geosynchronous mission and for a manned space station mission are presented. A review of existing lightweight solar array system concepts revealed that changes in the system approach are necessary to achieve the specified 110 watt/kg goal. A comprehensive review of existing component technology is presented in the areas of thin solar cells, solar cell covers, welded interconnectors, substrates and deployable booms. Advances in the state-of-the-art of solar cell and deployable boom technology were investigated. System level trade studies required to select the optimum boom bending stiffness, system aspect ratio, bus voltage level, and solar cell circuit arrangement are reported. Design analysis tasks included the thermal analysis of the solar cell blanket, thermal stress analysis of the solar cell interconnectors/substrate, and the thermostructural loading of the deployed boom.

  19. Towards ten-watt-level 3-5 µm Raman lasers using tellurite fiber.

    PubMed

    Zhu, Gongwen; Geng, Lixiang; Zhu, Xiushan; Li, Li; Chen, Qian; Norwood, R A; Manzur, T; Peyghambarian, N

    2015-03-23

    Raman lasers based on mid-infrared fibers operating at 3-5 µm atmospheric transparency window are attractive sources for several applications. Compared to fluoride and chalcogenide fibers, tellurite fibers are more advantageous for high power Raman fiber laser sources at 3-5 µm because of their broader Raman gain bandwidth, much larger Raman shift and better physical and chemical properties. Here we report on our simulations for the development of 10-watt-level 3-5 µm Raman lasers using tellurite fibers as the nonlinear gain medium and readily available continuous-wave (cw) and Q-switched erbium-doped fluoride fiber lasers at 2.8 µm as the pump sources. Our results show that a watt-level or even ten-watt-level fiber laser source in the 3-5 µm atmospheric transparency window can be achieved by utilizing the 1st- and 2nd-order Raman scattering in the tellurite fiber. The presented numerical study provides valuable guidance for future 3-5 um Raman fiber laser development.

  20. Automating Visualization Service Generation with the WATT Compiler

    NASA Astrophysics Data System (ADS)

    Bollig, E. F.; Lyness, M. D.; Erlebacher, G.; Yuen, D. A.

    2007-12-01

    As tasks and workflows become increasingly complex, software developers are devoting increasing attention to automation tools. Among many examples, the Automator tool from Apple collects components of a workflow into a single script, with very little effort on the part of the user. Tasks are most often described as a series of instructions. The granularity of the tasks dictates the tools to use. Compilers translate fine-grained instructions to assembler code, while scripting languages (ruby, perl) are used to describe a series of tasks at a higher level. Compilers can also be viewed as transformational tools: a cross-compiler can translate executable code written on one computer to assembler code understood on another, while transformational tools can translate from one high-level language to another. We are interested in creating visualization web services automatically, starting from stand-alone VTK (Visualization Toolkit) code written in Tcl. To this end, using the OCaml programming language, we have developed a compiler that translates Tcl into C++, including all the stubs, classes and methods to interface with gSOAP, a C++ implementation of the Soap 1.1/1.2 protocols. This compiler, referred to as the Web Automation and Translation Toolkit (WATT), is the first step towards automated creation of specialized visualization web services without input from the user. The WATT compiler seeks to automate all aspects of web service generation, including the transport layer, the division of labor and the details related to interface generation. The WATT compiler is part of ongoing efforts within the NSF funded VLab consortium [1] to facilitate and automate time-consuming tasks for the science related to understanding planetary materials. Through examples of services produced by WATT for the VLab portal, we will illustrate features, limitations and the improvements necessary to achieve the ultimate goal of complete and transparent automation in the generation of web

  1. Suspended-sediment inflows to Watts Bar Reservoir. Revision 1

    SciTech Connect

    Ewing, L.K.

    1993-09-01

    Suspended-sediment inflows to Watts Bar Reservoir are important data that are required in numerical modeling of transport and deposition of sediment in the reservoir. Acceptable numerical modeling requires sediment inflow rates and locations in order to be able to compute the location and quantity of sediment deposited within the reservoir. Therefore, the representativeness of modeling results is highly dependent on the characteristics of sediment input to the model. The following recommendations, that account for suspended-sediment inflows to be used in the numerical modeling of sediment transport and deposition in Watts Bar Reservoir, were developed through an evaluation of available watershed and sediment deposition data. (1) Use the suspended-sediment rating regression equations of Gaydos et al., for Emory River at Oakdale, TN, and for Poplar Creek near Oak Ridge, TN, to represent the suspended-sediment inflows into Watts Bar Reservoir from its tributaries; (2) Use a suspended-sediment rating regression equation that was derived from suspended-sediment and streamflow data of the Little Tennessee River at McGhee, TN, to represent sediment inflow from the Little Tennessee River for simulation of any historical year before the completion of Tellico Dam; (3) Check the appropriateness of any assumption for suspended-sediment inflows from upstream reservoirs by using its long-term relationship to local suspended-sediment inflows and to the suspended-sediment outflow through Watts Bar Dam; and (4) Focus refinements to suspended-sediment inflow rates on the Clinch arm of Watts Bar Reservoir.

  2. 5 Watt, Solid State, EHF Transmitter.

    DTIC Science & Technology

    2014-09-26

    satellite-communication ground terminals. This state-of- the- art transmitter demonstrates efficient and cost-effective RF power generation at EHF for...are relatively little or no spectrum allocation problems, is that the state-of-the- art in RF power generation is far below the required levels for...accomplished using E-H hybrid magic tees of reduced height waveguide with good balance and isolation characteristics. Modulation and other signal

  3. Design of the new METAS watt balance experiment Mark II

    NASA Astrophysics Data System (ADS)

    Baumann, H.; Eichenberger, A.; Cosandier, F.; Jeckelmann, B.; Clavel, R.; Reber, D.; Tommasini, D.

    2013-06-01

    The kilogram is the last unit of the international system of units (SI) still based on a material artefact, the international prototype of the kilogram (IPK). The comparisons made in the last hundred years have clearly revealed a long-term relative drift between the IPK and the official copies kept under similar conditions at the Bureau International des Poids et Mesures. A promising route towards a new definition of the kilogram based on a fundamental constant is represented by the watt balance experiment which links the mass unit to the Planck constant h. For more than ten years, the Federal Institute of Metrology METAS has been actively working in the conception and development of a watt balance experiment. This paper describes the new design of the Mark II METAS watt balance. The metrological characteristics of the different components of the experiment are described and discussed.

  4. Particle Swarm Optimization with Watts-Strogatz Model

    NASA Astrophysics Data System (ADS)

    Zhu, Zhuanghua

    Particle swarm optimization (PSO) is a popular swarm intelligent methodology by simulating the animal social behaviors. Recent study shows that this type of social behaviors is a complex system, however, for most variants of PSO, all individuals lie in a fixed topology, and conflict this natural phenomenon. Therefore, in this paper, a new variant of PSO combined with Watts-Strogatz small-world topology model, called WSPSO, is proposed. In WSPSO, the topology is changed according to Watts-Strogatz rules within the whole evolutionary process. Simulation results show the proposed algorithm is effective and efficient.

  5. Assessment of Building Energy-Saving Policies and Programs in China During the 11th Five Year Plan

    SciTech Connect

    Zhou, Nan; Mcneil, Michael; Levine, Mark

    2011-03-01

    China's 11th Five-Year Plan (FYP) sets an ambitious target to reduce the energy intensity per unit of gross domestic product (GDP) by 20% from 2005 to 2010 (NDRC, 2006). In the building sector, the primary energy-saving target allocated during the 11 FYP period is 100 Mtce. Savings are expected to be achieved through the strengthening of enforcement of building energy efficiency codes, existing building retrofits and heat supply system reform, followed by energy management of government office buildings and large scale public buildings, adoption of renewable energy sources. To date, China has reported that it achieved the half of the 20% intensity reduction target by the end of 2008, however, little has been made clear on the status and the impact of the building programs. There has also been lack of description on methodology for calculating the savings and baseline definition, and no total savings that have been officially reported to date. This paper intends to provide both quantitative and qualitative assessment of the key policies and programs in building sector that China has instituted in its quest to fulfill the national goal. Overall, this paper concludes that the largest improvement for building energy efficiency were achieved in new buildings; the program to improve the energy management in government and large scale public buildings are in line with the target; however the progress in the area of existing building retrofits, particularly heating supply system reform lags behind the stated goal by a large amount.

  6. Assessment of Building Energy-Saving Policies and Programs in China During the 11th Five Year Plan

    SciTech Connect

    Zhou, Nan; McNeil, Michael; Levine, Mark

    2010-06-07

    China's 11th Five-Year Plan (FYP) sets an ambitious target to reduce the energy intensity per unit of gross domestic product (GDP) by 20% from 2005 to 2010 (NDRC, 2006). In the building sector, the primary energy-saving target allocated during the 11 FYP period is 100 Mtce. Savings are expected to be achieved through the strengthening of enforcement of building energy efficiency codes, existing building retrofits and heat supply system reform, followed by energy management of government office buildings and large scale public buildings, adoption of renewable energy sources. To date, China has reported that it achieved the half of the 20% intensity reduction target by the end of 2008, however, little has been made clear on the status and the impact of the building programs. There has also been lack of description on methodology for calculating the savings and baseline definition, and no total savings that have been officially reported to date. This paper intend to provide both quantitative and qualitative assessment of the key policies and programs in building sector that China has instituted in its quest to fulfill the national goal. Overall, this paper concludes that the largest improvement for building energy efficiency were achieved in new buildings; the program to improve the energy management in government and large scale public buildings are in line with the target; however the progress in the area of existing building retrofit particularly heat supply system reform lags the stated goal by a large amount.

  7. Using Guided Notes to Increase the Understanding of Anatomy and Physiology in 11th Grade Science Students

    NASA Astrophysics Data System (ADS)

    Mariano, Jay

    A survey of over 500 science teachers reported that two thirds of their science classes were lecture based lessons where students were required to listen and take notes (Boyle, 2010). In addition to taking notes from lectures, note taking is a necessary skill to possess to record scientific observations and procedures and record information during class. Guided notes is a pedagogical method in which the instructor prepares and provides students with a modified form of lecture information to guide students (Neef, McCord, & Ferreri, 2006). This study examined the extent to which the use of guided notes in a unit of study of the muscular system of anatomy and physiology positively affected the mastery on content-based assessments for 11 th grade students. The data collection methods included quiz and test scores, a 4-point Likert scale survey, and an open-ended questionnaire. Results of the data revealed that guided notes was one factor that led to mastery in learning content. Additionally, students in this study preferred this method as it helped them to distinguish relevant information allowing more time to listen and focus on the teacher.

  8. Personalized integrative oncology: targeted approaches for optimal outcomes: the 11th International Conference of the Society for Integrative Oncology.

    PubMed

    Lee, Richard T; Yang, Peiying; Greenlee, Heather; Bauer-Wu, Susan; Balneaves, Lynda G; Zick, Suzanna

    2015-01-01

    The 11th International Conference of the Society for Integrative Oncology (SIO) brought together more than 300 clinicians, researchers, patients, and advocates to hear and interact with world-leading experts about the latest research in the areas of nutrition, exercise, acupuncture, health services research, meditation, and other integrative disciplines. The conference theme, "Personalized Integrative Oncology: Targeted Approaches for Optimal Outcomes," highlighted innovations in personalized medicine and ways this growing field will advance the evolution of individualized integrative cancer care to the next level. This year's conference also featured a clinical track focusing on clinical information for the practicing health care professional. The conference's rigorous schedule included 3 keynotes, 4 plenary sessions, 2 interdisciplinary tumor boards, 5 workshops, 45 concurrent oral sessions, and 106 posters. In addition to the conference theme, keynote and plenary sessions presented topics on stress and cancer, the importance of sleep for cancer patients, epigenetic mechanisms of lifestyle and natural products, recently published Journal of the National Cancer Institute monograph on integrative oncology, SIO's clinical practice guidelines for breast cancer survivors, and a joint session of the American Academy of Hospice and Palliative Medicine and SIO about supportive care and symptom management. This highly successful conference helped further the mission of the SIO to advance evidence-based, comprehensive, integrative health care to improve the lives of people affected by cancer.

  9. Threat appraisals, distress and the development of positive life changes after September 11th in a Canadian sample.

    PubMed

    Davis, Christopher G; Macdonald, Stephanie L

    2004-01-01

    Several surveys have reported the negative psychological impact on the general public of the terrorist attacks in the USA of September 11th, 2001. Yet the attacks also led many people to make positive changes in their relationships, values and priorities. A survey of 80 adults in Ottawa, Canada demonstrated that greater perceived threat and greater initial distress reactions significantly predicted the extent to which people reported positive changes in their lives (e.g. closer to family, refocused priorities). Initial distress and greater perceived threat also correlated positively with whether people provided help after the disaster. Follow-up data on 40 of these participants 11 months later revealed significant stability over time for the extent of positive life changes reported, and demonstrated that degree of initial distress and perceived threat continued to correlate positively with life change reports at this later point in time. The data are consistent with the argument that the perception of growth may develop out of one's personal experience of emotional pain.

  10. Increased use of cigarettes, alcohol, and marijuana among Manhattan, New York, residents after the September 11th terrorist attacks.

    PubMed

    Vlahov, David; Galea, Sandro; Resnick, Heidi; Ahern, Jennifer; Boscarino, Joseph A; Bucuvalas, Michael; Gold, Joel; Kilpatrick, Dean

    2002-06-01

    The September 11, 2001, terrorist attacks were the largest human-made disaster in the United States since the Civil War. Studies after earlier disasters have reported rates of psychological disorders in the acute postdisaster period. However, data on postdisaster increases in substance use are sparse. A random digit dial telephone survey was conducted to estimate the prevalence of increased cigarette smoking, alcohol consumption, and marijuana use among residents of Manhattan, New York City, 5-8 weeks after the attacks. Among 988 persons included, 28.8% reported an increase in use of any of these three substances, 9.7% reported an increase in smoking, 24.6% reported an increase in alcohol consumption, and 3.2% reported an increase in marijuana use. Persons who increased smoking of cigarettes and marijuana were more likely to experience posttraumatic stress disorder than were those who did not (24.2% vs. 5.6% posttraumatic stress disorder for cigarettes; 36.0% vs. 6.6% for marijuana). Depression was more common among those who increased than for those who did not increase cigarette smoking (22.1 vs. 8.2%), alcohol consumption (15.5 vs. 8.3%), and marijuana smoking (22.3 vs. 9.4%). The results of this study suggest a substantial increase in substance use in the acute postdisaster period after the September 11th attacks. Increase in use of different substances may be associated with the presence of different comorbid psychiatric conditions.

  11. The behavioral impacts of firm-level energy-conservation goals in China's 11th five-year plan.

    PubMed

    Wu, Dan; Xu, Yuan; Leung, Yee; Yung, Chor Wing

    2015-01-06

    Energy efficiency is one of the most effective means of curbing energy consumption and associated pollutant emissions. However, energy-saving opportunities at negative net costs, or an energy-efficiency gap, widely exist and they defy an entirely rational explanation. This paper examines the significant overperformance of energy-intensive firms against their assigned energy-conservation goals in a national program in China's 11th Five-Year plan (2006-2010). Higher energy prices can be only partially responsible for more active energy saving. Behavioral constraints are explained to cause the bounded rationality of firms on energy-efficiency investment. As our theoretical and empirical studies show, energy-conservation goals could overcome such behavioral constraints to accelerate the commercialization of energy-efficiency technologies, reduce uncertainty and hesitancy of relevant investment, facilitate the enrichment of information, and concentrate the attention of firms on energy conservation. We conclude that goal-setting could provide an effective complementary policy instrument in dealing with energy conservation in China and possibly in other parts of the world.

  12. Why Watts? An American Dilemma Today: Teacher's Manual; Student's Manual.

    ERIC Educational Resources Information Center

    Vogt, Carol Busch

    Designed to invite the senior and junior high school student to investigate the immediate and underlying causes of riots and what can be done to prevent them, the student manual of this unit begins with a description of the Watts riots of 1965. The student is encouraged to draw his own conclusions, and to determine the feasibility of a variety of…

  13. A Simple Watt Balance for the Absolute Determination of Mass

    ERIC Educational Resources Information Center

    Quinn, Terry; Quinn, Lucas; Davis, Richard

    2013-01-01

    A watt balance is an electromechanical device that allows a mass to be determined in terms of measurable electrical and mechanical quantities, themselves traceable to the fundamental constants of physics. International plans are well advanced to redefine the unit of mass, the kilogram, in terms of a fixed numerical value for the Planck constant. A…

  14. An Interview with Toni Watt, 2004 Award Winner

    ERIC Educational Resources Information Center

    Journal of Chemical Education, 2004

    2004-01-01

    Toni Austin Watt, the winner of the 2004 James Bryant Conant Award in High School Chemistry Teaching says that she was always an average student and had to invest more time in improving her skills and getting experiences, thus she is exhilarated that her efforts have received such acclaim and is honored that people thought her efforts were…

  15. Fishery status assessment of Watts Bar Reservoir with management recommendations

    SciTech Connect

    Alexander, C.M.

    1987-09-01

    Watts Bar Reservior was impounded in 1942 and has been inventoried 16 of the following 44 years. The previous inventory was 1980. Fish biomass has increased over the years, most noticeably in prey and commercial species. Sport fish biomass has been the most stable overall. However, creel data indicate some important sport species numbers have had extreme fluctuations. 21 refs., 20 figs., 9 tabs.

  16. Early performance of the 12-GHz, 200-watt transmitter experiment package in the communications technology satellite

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Measured performance characteristics of the transmitter experiment package (TEP) aboard the Communications Technology Satellite for the first 90 operating days in orbit are presented. The TEP consists of a nominal 200-watt output stage tube (OST), a supporting power processing system (PPS), and a variable-conductance heat pipe system (VCHPS). The OST, a traveling-wave tube augmented with a 10-stage depressed collector, has an overall saturated average efficiency of 51.5 percent and an average saturated radiofrequency (RF) output power at center-band frequency of 240 watts. The PPS operated with a measured efficiency of 86.5 percent to 88.5 percent. The VCHPS, using three pipes to conduct heat from the PPS and the body of the OST to a 52-centimeter by 124-centimeter (20.5-in. by 48.75-in.) radiator fin, maintained by the PPS baseplate temperature below 50 C for all operating conditions. The TEP performance characteristics presented include frequency response, RF output power, efficiency, and distortions. Communications characteristics were evaluated by using both video and audio modulated signals.

  17. Proceedings of the International Association for Development of the Information Society (IADIS) International Conference on Mobile Learning (11th, Madeira, Portugal, March 14-16, 2015)

    ERIC Educational Resources Information Center

    Sánchez, Inmaculada Arnedillo, Ed.; Isaías, Pedro, Ed.

    2015-01-01

    These proceedings contain the papers and posters of the 11th International Conference on Mobile Learning 2015, which was organised by the International Association for Development of the Information Society, in Madeira, Portugal, March 14-16, 2015. The Mobile Learning 2015 Conference seeks to provide a forum for the presentation and discussion of…

  18. The Advanced Program of Vocational Agriculture in Louisiana. Ag III and Ag IV (11th and 12th Grades). Volume II. Bulletin No. 1725.

    ERIC Educational Resources Information Center

    Louisiana State Dept. of Education, Baton Rouge. Div. of Vocational Education.

    This curriculum guide consists of materials for use in teaching an advanced course in agricultural mechanics designed for 11th and 12th grade students. Addressed in the individual units of the guide are arc welding; oxy-acetylene welding; soldering; electricity; tractor maintenance, operation, and safety; small engines; farm structures; and cold…

  19. Post-September 11Th Perspectives on Religion, Spirituality, and Philosophy in the Personal and Professional Lives of Selected REBT Cognoscenti

    ERIC Educational Resources Information Center

    Weinrach, Stephen G.; Dryden, Windy; DiMattia, Dominic J.; Doyle, Kristene A.; MacLaren, Catherine; O'Kelly, Monica; Malkinson, Ruth

    2004-01-01

    The purpose of this article was for selected Rational Emotive Behavior Therapy (REBT) cognoscenti to examine the impact of the events of September 11th, 2001, on their beliefs about religion, spirituality and their personal philosophy--including the role of evil in the universe and the implications of these issues on their use of REBT. The degree…

  20. The Advanced Program of Vocational Agriculture in Louisiana. Ag III and Ag IV (11th and 12th Grades). Volume I. Bulletin No. 1725.

    ERIC Educational Resources Information Center

    Louisiana State Dept. of Education, Baton Rouge. Div. of Vocational Education.

    This curriculum guide consists of materials for use in teaching an advanced course in vocational agriculture designed for 11th and 12th grade students. Addressed in the individual units of the guide are the following topics: farm and agribusiness planning, employment-seeking skills, agricultural chemicals, and conservation. Each unit includes a…

  1. Proceedings of the International Conference on Cognition and Exploratory Learning in Digital Age (CELDA) (11th, Porto, Portugal, October 25-27, 2014)

    ERIC Educational Resources Information Center

    Sampson, Demetrios G., Ed.; Spector, J. Michael, Ed.; Ifenthaler, Dirk, Ed.; Isaias, Pedro, Ed.

    2014-01-01

    These proceedings contain the papers of the 11th International Conference on Cognition and Exploratory Learning in the Digital Age (CELDA 2014), October 25-27, 2014, which has been organized by the International Association for Development of the Information Society (IADIS) and endorsed by the Japanese Society for Information and Systems in…

  2. Empowering the CBE Practitioner. Proceedings of the Annual CBAE National Conference (11th, Washington, D.C., October 20-21, 1987).

    ERIC Educational Resources Information Center

    American Association for Adult and Continuing Education, Washington, DC. Adult Competency Education Unit.

    These proceedings include a brief overview of the 11th Competency-Based Adult Education (CBAE) Conference along with the texts of the following conference presentations: "National Legislative Update" (Patricia M. Keeton); "Adult School/High-Risk Youth Connection--Is There One?" (Joellen Bruce); "Overview of Adult ESL Programs: A National…

  3. Post-September 11Th Perspectives on Religion, Spirituality, and Philosophy in the Personal and Professional Lives of Selected Rebt Cognoscenti: A Response to My Colleagues.

    ERIC Educational Resources Information Center

    Ellis, Albert

    2004-01-01

    This is a discussion and evaluation of the views of the authors of the article "Post-September 11th Perspectives on Religion, Spirituality, and Philosophy in the Personal and Professional Lives of Selected REBT Cognoscenti." Several of the authors are shown to endorse most of the main principles and practices of Rational Emotive Behavior Therapy…

  4. 47 CFR 90.542 - Broadband transmitting power limits.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the 763-768 MHz band with an emission bandwidth of 1 MHz or less must not exceed an ERP of 1000 watts... if power levels are reduced below 1000 watts ERP in accordance with Table 1 of this section. (2... ERP of 2000 watts and an antenna height of 305 m HAAT, except that antenna heights greater than 305...

  5. 47 CFR 90.542 - Broadband transmitting power limits.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... the 763-768 MHz band with an emission bandwidth of 1 MHz or less must not exceed an ERP of 1000 watts... if power levels are reduced below 1000 watts ERP in accordance with Table 1 of this section. (2... ERP of 2000 watts and an antenna height of 305 m HAAT, except that antenna heights greater than 305...

  6. 47 CFR 90.542 - Broadband transmitting power limits.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... the 758-768 MHz band with an emission bandwidth of 1 MHz or less must not exceed an ERP of 1000 watts... if power levels are reduced below 1000 watts ERP in accordance with Table 1 of this section. (2... ERP of 2000 watts and an antenna height of 305 m HAAT, except that antenna heights greater than 305...

  7. 47 CFR 90.542 - Broadband transmitting power limits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the 763-768 MHz band with an emission bandwidth of 1 MHz or less must not exceed an ERP of 1000 watts... if power levels are reduced below 1000 watts ERP in accordance with Table 1 of this section. (2... ERP of 2000 watts and an antenna height of 305 m HAAT, except that antenna heights greater than 305...

  8. 47 CFR 90.542 - Broadband transmitting power limits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the 763-768 MHz band with an emission bandwidth of 1 MHz or less must not exceed an ERP of 1000 watts... if power levels are reduced below 1000 watts ERP in accordance with Table 1 of this section. (2... ERP of 2000 watts and an antenna height of 305 m HAAT, except that antenna heights greater than 305...

  9. PREFACE: 11th International Spring Seminar on Nuclear Physics: Shell Model and Nuclear Structure - achievements of the past two decades

    NASA Astrophysics Data System (ADS)

    2015-02-01

    The 11th International Seminar on Nuclear Physics was held in Ischia from May 12 to May 16, 2014. This Seminar was dedicated to Aldo Covello, who has been the promoter of this series of meetings, which started in Sorrento in 1986 and continued with meetings held every two or three years in the Naples area. Aldo's idea was to offer to a group of researchers, actively working in selected fields of Nuclear Physics, the opportunity to confront their points of view in a lively and informal way. The choice for the period of the year, Spring, as well as the sites chosen reflected this intent. The first meeting was of a purely theoretical nature, but it was immediately clear that the scope of these conferences needed to be enlarged calling into play the experimental community. Then, starting from the second meeting, all the following ones have been characterized by fruitful discussion between theoretical and experimental researchers on current achievements and future developments of nuclear structure. This may be read, in fact, as one of the motivating factors for Aldo's election as Fellow of the American Physical Society in 2008 "... for his outstanding contributions to the international nuclear physics community by providing, for over two decades, a venue for theorists and experimentalists to share their latest ideas." The present meeting, organized by Aldo's former students and with the benefit of his suggestions, has maintained this tradition. The title "Shell model and nuclear structure: achievements of the past two decades" recalls that of the 2nd International Spring Seminar "Shell Model and Nuclear Structure: where do we stand?". The main aim of this 11th Seminar was, in fact, to discuss the changes of the past two decades on our view of nuclei in terms of shell structure as well as the perspectives of the shell model, which has been one of the key points in Aldo's research. This point is well accounted by the Opening Speech of Igal Talmi, one of the fathers of the

  10. Initial clinical results of laser prostatectomy procedure for symptomatic BPH using a new 50-watt diode laser (wavelength 1000 nm)

    NASA Astrophysics Data System (ADS)

    Bhatta, Krishna M.

    1995-05-01

    Lasers have been used for symptomatic Benign Prostatic Hyperplasia (BPH) in both contact and non-contact modes with reported success rates equivalent to that of Transurethral Resection of Prostate (TURP). A new high power diode laser (Phototome), capable of delivering up to 50 watts of 1000 nm wavelength laser power via a 1 mm quartz fiber, was used to treat 15 patients with symptomatic BPH. Five patients had acute retention, 3 had long term catheter (7 - 48 months), and 8 had severe prostatism. Spinal anesthesia was used in 11 patients, and 4 patients had local anesthesia and intravenous sedation. Four quadrant coagulation with an angle firing probe delivering 50 watts of laser power for 60 seconds in one quadrant was used as the core of the treatment in 11 patients, contact vaporization of BPH tissue was performed in one patient using a 4.5 mm ball tip was used in one patient and three patients with bladder neck stenosis had bladder neck incision performed using a 1 mm quartz fiber delivering 30 watts of laser power. A foley catheter was left indwelling and removed after 5 - 7 days. All patients except one were catheter free after a mean of 8 days. One patient continued to have severe prostatism and had a TURP performed with good results after 3 months of his laser prostatectomy procedure. AUA symptom scores available in 11 patients was found to be 4 after 1 - 3 months of the initial procedure.

  11. Healthcare Coverage and Disability Evaluation for Reserve Component Personnel: Research for the 11th Quadrennial Review of Military Compensation.

    PubMed

    Hosek, Susan D

    2012-01-01

    Because Reserve Component (RC) members have been increasingly used in an operational capacity, among the policy issues being addressed by the 11th Quadrennial Review of Military Compensation (QRMC) is compensation and benefits for the National Guard and Reserve. As part of the review, RAND was asked to analyze healthcare coverage and disability benefits for RC members, including participation in the TRICARE Reserve Select (TRS) program, the potential effects of national health reform on coverage rates, and disability evaluation outcomes for RC members. This article summarizes the results of RAND's analysis. The author finds that 30 percent of RC members lack health insurance to cover care for non-service-related conditions. The TRS program offers the option of purchasing health insurance through the military on terms that are superior to typical employer benefits. Although program participation has increased, it remains low and TRS does not appear to be effectively targeting those most likely to be uninsured. TRS premiums are also lower than the premiums for the new options that will be available under health reform and the same as the penalty for not being insured. So health reform is likely to increase TRS enrollment. Finally, previously deployed RC members are referred to the Disability Evaluation System at a much lower rate than Active Component (AC) members, even for deployment-related conditions, but those who are referred receive dispositions (and thus benefits) similar to those for AC members. These findings suggest that the Department of Defense may want to consider ways to better coordinate TRS with other insurance options that will be available to RC members and that the identification of RC members who experience health consequences from deployment leading to disability merits further investigation.

  12. Performance of the 12GHz, 200 watt transmitter experiment package for the Hermes satellite

    NASA Technical Reports Server (NTRS)

    Alexovich, R. E.

    1977-01-01

    Performance characteristics from on-orbit tests of the Transmitter Experiment Package (TEP) for the Hermes Satellite are presented. The TEP consists of a Power Processing System (PPS), an Output Stage Tube (OST) and a Variable Conductance Heat Pipe System (VCHPS), all of which are described. The OST is a coupled-cavity Traveling Wave Tube (TWT) with a Multistage Depressed Collector (MDC) and a stepped velocity-tapered slow wave structure for efficiency enhancement. It has an RF output power of 233 watts and overall efficiency of 50.75 percent at a center band frequency of 12.080 GHz. The PPS provides the required operating voltages, regulation, control and protection for the OST. The VCHPS consists of a fin radiator and three dual-artery stainless steel heat pipes using methanol and a mixture of inert gases. Test results presented include efficiencies, RF output power and body current. A discussion of thermal anomalies which occurred is presented.

  13. A Comparison of Ion Acceleration Characteristics for Krypton and Xenon Propellants within a 600 Watt Hall Thruster

    DTIC Science & Technology

    2012-07-20

    fluctuation.8,9 However, care must be taken to ensure that the relative effects of these phenomena are separable. In addition, magnetic ( Zeeman effect ...capability. This work compares the internal propellant acceleration of krypton within a laboratory medium power Hall effect thruster to historical xenon...Watt Hall Effect Thruster William A. Hargus, Jr.∗ Gregory M. Azarnia† Michael R. Nakles‡ Air Force Research Laboratory, Edwards Air Force Base, CA

  14. STI. DE-FG02-00ER1505 [Brief summary of 11th International Conference on Arabidopsis Research

    SciTech Connect

    2000-06-24

    The 11th International Conference on Arabidopsis Research was held in Madison, Wisconsin, June 24 through June 28, 2000. Arabidopsis thaliana has been the subject of genetic study for many years. However, during the last decade, the number of research laboratories using Arabidopsis as a model system has increased tremendously, and Arabidopsis is currently being used to study all aspects of plant biology. The rapid rate of progress in Arabidopsis research, including the completion of the genomic sequence, underscores the usefulness of holding a meeting every year. These conferences provide an important opportunity for the Arabidopsis community to interact and exchange information. The meeting opened with an evening keynote address on the global impact of plant biology, delivered by Richard Jefferson, the Executive Director of CAMBIA (Center for the Application of Molecular Biology to International Agriculture). This was followed by short updates from each of the NSF-funded Plant Genome groups. Many of these groups are carrying out projects that impact the Arabidopsis community. Each of the 17 platform sessions consisted of talks from two invited speakers followed by two short talks that were chosen from the submitted poster abstracts. A concerted effort was made to invite junior investigators, including graduate students and postdocs, to give these talks. Posters were available for viewing during three formal sessions, and, because the poster session was adjacent to the lecture hall, it was easy for participants to go back and forth between posters and lectures. Finally, a mixer and an informal banquet provided opportunities for participants to meet new people and renew acquaintances. Furthermore, the registration package included all lunches and dinners together in a cafeteria next to the posters and lecture hall, thus encouraging the meeting of established investigators with students and postdocs. The North American Arabidopsis Steering Committee (elected by

  15. External Pressure Testing of the 60-Watt Isotopic Heat Source

    SciTech Connect

    Frazier, T. A.; Christenbury, S. T.

    1995-03-15

    The purpose of this manual is to establish the capability of the IHS generator system to contain its radioisotopic source under an accident scenario in which the generator is deposited in the ocean at great depth. This procedure is to be used on assemblies designated to demonstrate the capability of the 60-watt IHS in external pressure environments. A qualified helium leak technician (NDE) performs evaluations during post test activities. Quality Engineering (QE) is present during testing to monitor activities. Testing involves a 60-watt IHS/Heater Head Assembly with the simulant yttria in place of the isotopic fuel. The standard length 0.094 inch diameter SST dowel pin is replaced with a longer pin to facilitate disassembly. The assembly is tested to 1000 atmospheres (-15,000 psi). It is then evaluated. If it shows no evidence of collapse, an additional test is conducted for information only. The Source Document is "Safety Test Program Plan for the 60-Watt Isotopic Heat Source (IHS)", TBE-32156-IHS-008 Issue

  16. Analysis of physics textbooks for 10th and 11th grades in accordance with the 2013 secondary school physics curriculum from the perspective of project-based learning

    NASA Astrophysics Data System (ADS)

    Kavcar, Nevzat; Erdem, Aytekin

    2017-02-01

    This study aims to investigate the 10th and 11th grade Physics textbooks in accordance with the 2013 Secondary School Physics Curriculum from the perspective of project-based learning method and to share the results with the physics education public. The research was carried out in the 2015-2016 academic year as part of an undergraduate course taught in physics teaching program at a faculty of education; and 10 senior students of physics teachercandidates participated in the study. The research method is the survey model based on qualitative research approach. Data collection tools consist of the reports written by the participants who examined the curriculum and textbooks for project-based learning problems. According to research findings, most of the educational gains in the 10th and 11th grade physics textbooks were supported with experimental activities; however, project-based assignments are needed.

  17. Feasibility study of a 110 watt per kilogram lightweight solar array system

    NASA Technical Reports Server (NTRS)

    Shepard, N. F.; Stahle, C. V.; Schneider, A.; Hanson, K. L.

    1972-01-01

    An investigation of the feasibility of a solar array panel subsystem which will produce 10,000 watts of electrical output at 1 A.U. with an overall beginning-of-life power-to-weight ratio of at least 110 watt/kg is reported. A description of the current baseline configuration which meets these requirements is presented. A parametric analysis of the single boom, two blanket planar solar array system was performed to arrive at the optimum system aspect ratio. A novel concept for the stiffening of a lightweight solar array by canting the solar cell blankets at a small angle to take advantage of the inherent in-plane stiffness to increase the symmetric out-of-plane frequency is introduced along with a preliminary analysis of the stiffening effect. A comparison of welded and soldered solar cell interconnections leads to the conclusion that welding is required on this ultralightweight solar array. The use of a boron/aluminum composite material in a BI-STEM type deployable boom is investigated as a possible advancement in the state-of-the-art.

  18. 3 Watt CW OPO tunable 604nm to 616nm for quantum optics applications

    NASA Astrophysics Data System (ADS)

    Henderson, Angus; Halfmann, Thomas; Mieth, Simon

    2012-06-01

    A continuous wave optical parametric oscillator (CW OPO) pumped by a fiber laser has been developed which emits up to 3 Watts of single longitudinal mode radiation tunable in the wavelength range 604nm to 616nm. The device is a modified version of the ``Argos'' Model 2400 commercial product by Lockheed Martin Aculight. A 15 Watt 1064nm fiber laser pumps a CW OPO based upon periodically-poled Lithium Niobate (PPLN). A short section of the nonlinear crystal is poled to allow efficient intracavity sum frequency generation (SFG) between the OPO pump and signal wavelengths to generate orange radiation. The device can be coarsely tuned by matching the poling periods and temperature within the nonlinear crystal to phase-match both OPO and SFG processes simultaneously. Fine mode-hop-free tuning of the orange wavelength of up to 100GHz range can be achieved by applying a voltage to a PZT which tunes the pump laser. By similar intracavity conversion schemes, the system offers the potential of providing high power at wavelengths from 600nm to 1400nm in addition to the direct signal and idler wavelength ranges from 1400nm to 4630nm. Such capability comes without the complexity and reliability issues which are inherent in dye and Ti:Sapphire systems. Details of the OPO system performance and its use in quantum optics applications will be provided.

  19. Psychological and health problems in a geographically proximate population time-sampled continuously for three months after the September 11th, 2001 terrorist incidents.

    PubMed

    Ford, Julian D; Adams, Mary L; Dailey, Wayne F

    2007-06-01

    This study assessed the mental and physical health status and psychological problems related to the September 11th terrorist incidents among a representative sample of adults living near New York City, using continuously time-sampled data collected throughout 2001. Prevalence estimates for poor mental or physical health after September 11th (October through December) were comparable to those for the entire year of 2001 (i.e. approximately 33%). Psychological problems related to the terrorist incidents were reported by more than half of the respondents, and appeared to peak in prevalence approximately two to three months following the incidents, followed by a decline in the next month and subsequent year. Poor mental health, female gender, media re-exposure, and ongoing or increased alcohol use were risk factors for psychological problems, while older age (65+ years old) and being married were protective factors. Risk factors for poor physical and mental health or psychological problems were generally stable over the three-month period following September 11th, but some changes were identified consistent with stage models of post-disaster psychological adjustment. Implications are discussed for using continuous time-sampling as a strategy to research patterns of relatively acute stress-related sequelae of terrorism in populations whose members are affected despite primarily not having been at the disaster epicenter.

  20. EDITORIAL: Proceedings of the 11th Gravitational Wave Data Analysis Workshop, Potsdam, Germany, 18 21 December 2006

    NASA Astrophysics Data System (ADS)

    Krishnan, B.; Papa, M. A.; Schutz, B. F.

    2007-10-01

    The 11th Gravitational Wave Data Analysis Workshop (GWDAW11) comes in the middle of the fifth science run (S5) of the LIGO detectors, after a full year of data-taking at design sensitivity. LIGO is starting to probe astrophysically plausible scenarios for the emission of detectable gravitational wave signals. In the absence of a detection, the upper limits on the strength of gravitational waves are beginning to add information to what was previously known from electromagnetic observations. One of the highlights of this workshop was the presentation by the LIGO Scientific Collaboration of a search for continuous waves from the Crab pulsar. Gravitational wave emission is constrained by the measured spindown measurements for the object: no more energy can go into gravitational waves than that which is lost by pulsar spindown. For most known pulsars this spindown upper limit on the strength of gravitational radiation is orders of magnitude higher than the upper limits that can be set with current gravitational wave observations. However for the Crab pulsar the gravitational wave observations which coherently combine about 9 months of data from the network of S5 LIGO detectors constrain the gravitational wave emission more strongly than the electromagnetic observations do. The gravitational wave upper limit also constrains the tri-axial ellipticity that this young pulsar could have supported since its crust solidified a thousand years ago. The Virgo detector is in the final stages of commissioning with several engineering runs completed. The TAMA detector's low frequency performance is being enhanced and another data run is foreseen by the end of 2007. The IGEC2 Collaboration presents results from the analysis of 131 days of data in coincidence among the three bar detectors EXPLORER, AURIGA and NAUTILUS. Studies are underway to analyze data in coincidence among bar and interferometer networks. Space-based detectors are receiving more attention, with the LISA Pathfinder

  1. Characterization of flexure hinges for the French watt balance experiment

    NASA Astrophysics Data System (ADS)

    Pinot, Patrick; Genevès, Gérard

    2014-08-01

    In the French watt balance experiment, the translation and rotation functions must have no backlash, no friction, nor the need for lubricants. In addition errors in position and movement must be below 100 nm. Flexure hinges can meet all of these criteria. Different materials, profile shapes and machining techniques have been studied. The flexure pivots have been characterized using three techniques: 1) an optical microscope and, if necessary, a SEM to observe the surface inhomogeneities; 2) a mass comparator to determine the bending stiffness of unloaded pivots; 3) a loaded beam oscillating freely under vacuum to study the dynamic behavior of loaded pivots.

  2. High Throughput 600 Watt Hall Effect Thruster for Space Exploration

    NASA Technical Reports Server (NTRS)

    Szabo, James; Pote, Bruce; Tedrake, Rachel; Paintal, Surjeet; Byrne, Lawrence; Hruby, Vlad; Kamhawi, Hani; Smith, Tim

    2016-01-01

    A nominal 600-Watt Hall Effect Thruster was developed to propel unmanned space vehicles. Both xenon and iodine compatible versions were demonstrated. With xenon, peak measured thruster efficiency is 46-48% at 600-W, with specific impulse from 1400 s to 1700 s. Evolution of the thruster channel due to ion erosion was predicted through numerical models and calibrated with experimental measurements. Estimated xenon throughput is greater than 100 kg. The thruster is well sized for satellite station keeping and orbit maneuvering, either by itself or within a cluster.

  3. Static phase improvements in the LNE watt balance

    NASA Astrophysics Data System (ADS)

    Pinot, P.; Espel, P.; Liu, Y.; Thomas, M.; Ziane, D.; Palacios-Restrepo, M.-A.; Piquemal, F.

    2016-10-01

    This paper describes the mechanical and electrical modifications carried out on the LNE watt balance to reduce the noise level associated with the static phase. The mechanical improvements concern the home-made balance beam using flexure hinges as pivots of the force comparator. The electrical improvements involve the source used to servo-control the equilibrium position of the beam during the static phase. All these modifications have led to a significant improvement of the repeatability and reproducibility of the results of static phase measurements.

  4. Watt-level passively Q-switched heavily Er3+-doped ZBLAN fiber laser with a semiconductor saturable absorber mirror

    PubMed Central

    Shen, Yanlong; Wang, Yishan; Luan, Kunpeng; Huang, Ke; Tao, Mengmeng; Chen, Hongwei; Yi, Aiping; Feng, Guobin; Si, Jinhai

    2016-01-01

    A diode-cladding pumped mid-infrared passively Q-switched Er3+-doped ZBLAN fiber laser with an average output power of watt-level based on a semiconductor saturable absorber mirror (SESAM) is demonstrated. Stable pulse train was produced at a slope efficiency of 17.8% with respect to launched pump power. The maximum average power of 1.01 W at a repetition rate of 146.3 kHz was achieved with a corresponding pulse energy of 6.9 μJ, from which the maximum peak power was calculated to be 21.9 W. To the best of our knowledge, the average power and the peak power are the highest in 3 μm region passively Q-switched fiber lasers. The influence of gain fiber length on the operation regime of the fiber laser has been investigated in detail. PMID:27225029

  5. A watt-class 1-THz backward-wave oscillator based on sine waveguide

    SciTech Connect

    Xu Xiong; Wei Yanyu; Shen Fei; Yin Hairong; Xu Jin; Gong Yubin; Wang Wenxiang

    2012-01-15

    A novel backward wave oscillator was proposed by utilizing a concise sine waveguide slow-wave structure combined with sheet electron beam to operate at terahertz frequency band. First, the design method was described, and the dispersion curve and interaction impedance of the sine waveguide were calculated, then the device oscillation frequency and operating voltage were determined. Next, the circuit transmission losses were learned over the tunable frequency range. Finally, the particle-in-cell simulation method was applied to predict its signal generation performance. The investigation results show that, the backward wave oscillator can produce over 1.9 -W peak power output at the central operating frequency of 1-THz under 27-kV operating voltage and 5-mA beam current. And the interaction efficiency at 1-THz is more than 1.4% with a circuit length of 7.2-mm. It, therefore, will be considered as a promising watt-class terahertz radiation source.

  6. Proceedings of the Annual National Conference on Ada Technology (11th), Held at Williamsburg, Virginia on 15-18 March 1993

    DTIC Science & Technology

    1993-03-18

    greatly appreciated. The authors wish to thank Linda K.i Contact: The ’Archie Group’ of McGill University Braun, Debra Burns, Jo) ce Coombs, Karen Fleming...Clear Lake Bob Saisi, DSD Laboratories 5 Linda Saus, EWA Dr. Francis Van Scoy 1 I I I I I I I I I I I 11th Annual National Conference on Ada Technology...Applied Expertise, Inc. Panelists: Eric Beser, Westinghouse Linda Braun, MountainNet Pam Arya, General Research Corp. David Dlkel, Applied Expertise 1

  7. SURFACE RUPTURE OF THE NORMAL SEISMIC FAULTS AND SLOPE FAILURES APPEARED IN APRIL 11th, 2011 FUKUSHIMA-PREFECTURE HAMADOORI EARTHQUAKE

    NASA Astrophysics Data System (ADS)

    Kazmi, Zaheer Abbas; Konagai, Kazuo; Kyokawa, Hiroyuki; Tetik, Cigdem

    On April 11th, 2011, Iwaki region of Fukushima prefecture was jolted by Fukushima-Prefecture Hamadoori Earthquake. Surface ruptures were observed along causative Idosawa and Yunotake normal faults. In addition to numerous small slope failures, a coherent landslide and building structures of Tabito Junior High School, bisected by Idosawa Fault, were found along the causative faults. A precise digital elevation model of the coherent landslide was obtained through the ground and air-born LiDAR surveys. The measurements of perimeters of the gymnasium building and the swimming pool of Tabito Junior High School have shown that ground undergoes a slow and steady/continual deformation.

  8. International Conference on Free Electron Lasers (11th) Conference Digest Held in Naples, Florida on 28 August-1 September 1989

    DTIC Science & Technology

    1989-12-01

    Coordination and Control of Production, Distribution, and Services - Central Power Distribi ,.tion Systems Research: - Public Education ...Fiel En~ Spoc fm Wigglem," Pmo. ilus Coaooo 51 G. Rakowthy. CL. a., "Ifi~h Porforgnain. Po.,nuo Pirnia Meot Uad&WLoaak Pf-os.ta coaf.,m.16 It Coooa

  9. The Bioelectromagnetics Society Annual Meeting (11th) Held at Tucson, Arizona on June 18-22, 1989: Abstracts

    DTIC Science & Technology

    1989-06-01

    SCATTERING IN MYOCARDIAL ABLATION WITH ND:YAG LASER IRRADIATION. Daniel K. Bogen and Garrett J. Derbyshire. Department of Bioengineering, University of...Pennsylvania, Philadelphia, PA 19104. To test the hypothesis that tissue coagulation during high-power Nd:YAG (1.06 Am) laser -irradiation of heart...Optical properties were derived from total transmittance and reflectance of laser light in thin slices of myocardium. In normal myocardium the

  10. Watt balance experiments for the determination of the Planck constant and the redefinition of the kilogram

    NASA Astrophysics Data System (ADS)

    Stock, M.

    2013-02-01

    Since 1889 the international prototype of the kilogram has served as the definition of the unit of mass in the International System of Units (SI). It is the last material artefact to define a base unit of the SI, and it influences several other base units. This situation is no longer acceptable in a time of ever increasing measurement precision. It is therefore planned to redefine the unit of mass by fixing the numerical value of the Planck constant. At the same time three other base units, the ampere, the kelvin and the mole, will be redefined. As a first step, the kilogram redefinition requires a highly accurate determination of the Planck constant in the present SI system, with a relative uncertainty of the order of 1 part in 108. The most promising experiment for this purpose, and for the future realization of the kilogram, is the watt balance. It compares mechanical and electrical power and makes use of two macroscopic quantum effects, thus creating a relationship between a macroscopic mass and the Planck constant. In this paper the background for the choice of the Planck constant for the kilogram redefinition is discussed and the role of the Planck constant in physics is briefly reviewed. The operating principle of watt balance experiments is explained and the existing experiments are reviewed. An overview is given of all presently available experimental determinations of the Planck constant, and it is shown that further investigation is needed before the redefinition of the kilogram can take place. This article is based on a lecture given at the International School of Physics ‘Enrico Fermi’, Course CLXXXV: Metrology and Physical Constants, held in Varenna on 17-27 July 2012. It will also be published in the proceedings of the school, edited by E Bava, M Kühne and A M Rossi (IOS Press, Amsterdam and SIF, Bologna).

  11. An intracavity, frequency-doubled BaWO(4) Raman laser generating multi-watt continuous-wave, yellow emission.

    PubMed

    Lee, Andrew J; Pask, Helen M; Piper, James A; Zhang, Huaijin; Wang, Jiyang

    2010-03-15

    We report the generation of multi-watt continuous-wave (CW) yellow laser emission from an intracavity diode-pumped Nd:GdVO(4) /BaWO(4) Raman laser utilising a high-Q resonator (for fundamental and first-Stokes wavelengths) and intracavity frequency-doubling in LBO. CW output power of 2.9 W is achieved with a high overall diode-to-yellow conversion efficiency of 11% and with good beam quality (M(2) approximately 2.5).

  12. Watt-level ~2 μm laser output in Tm3+-doped tungsten tellurite glass double-cladding fiber.

    PubMed

    Li, Kefeng; Zhang, Guang; Hu, Lili

    2010-12-15

    We report, for the first time to the best of our knowledge, a watt level cw fiber laser at ~2 μm from a piece of 40-cm-long newly developed highly thulium-doped (3.76 × 10(20) ions/cm(3)) tungsten tellurite glass double cladding fiber pumped by a commercial 800 nm laser diode. The maximum output power of the fiber laser reaches 1.12 W. The slope efficiency and the optical-optical efficiency with respect to the absorbed pump are 20% and 16%, respectively. The lasing threshold is 1.46 W, and the lasing wavelength is centered at 1937 nm.

  13. The Cabinet Member as a Representative of the President: The Case of James Watt.

    ERIC Educational Resources Information Center

    Renz, Mary Ann

    1987-01-01

    Compares the environmental rhetoric of former U.S. Interior Secretary James Watt and U.S. President Ronald Reagan, explaining that Watt's political value outweighed his political liability. Notes that cabinet members extend a President's influence by reaching issue-specific audiences while maintaining philosophical consistency, and serve as…

  14. Reliability Testing on the CTI-Cryogenic 1 Watt Integral Cooler (HD- 1033C/UA)

    DTIC Science & Technology

    1989-09-01

    SUBJECT TERMS (Continue on reverse if necessary and identify by block numbe) FIELD GROUP SUB-GROUP Cryocooler , Stirling Cycle, Cryogenics 19, ABSTRCT...Cryogenics I Watt Integral Stirling Cooler (HD- 1033C/UA). The common module I Watt Integral Cooler is currently used in the Ml FUR, M60 FLIR, and the

  15. Request for One-Time Shipment of 32 Watt PU-328 Source in 9968 Packaging

    SciTech Connect

    Massey, W.M.

    1998-11-25

    The 9968 package is designed for surface shipment of fissile and other radioactive materials where a high degree of double containment is required. The use of the 9968 radioactive material package for a one time shipment of a 32 watt heat source versus the SARP approved maximum 30 watt heat source is addressed in this report. The analyses show that the small increase in heat load from 30 watts to 32 watts does not substantially increase internal temperatures or pressures that would approach limits for the package. Also, the weight of the content is within the current 9968 package limits. It is concluded that the 32-watt heat source can be safely shipped in the 9968 package and therefore a waiver to ship the source is justified.

  16. Watt-level self-frequency-doubling Nd:GdCOB lasers.

    PubMed

    Wang, Jiyang; Zhang, Huaijin; Wang, Zhengping; Yu, Haohai; Zong, Nan; Ma, Changqin; Xu, Zuyan; Jiang, Minhua

    2010-05-24

    Laser-diode (LD) pumped self-frequency doubling (SFD) Nd:GdCa4O(BO3)3 (Nd:GdCOB) miniature laser was demonstrated. The output power as high as 1.35 W was achieved which is over than five times than previous values for Nd:LnCa4O(BO3)3 (Ln=Y or Gd) SFD lasers and becomes the highest continuous-wave output power in this field to our knowledge. The maximum optical conversion efficiency is 17%. By comparison, we found that the cutting direction along its optimal phase-matching direction out of the principal planes is the determining factor resulting in this watt-level efficient output power. Different with previous studies, the emission wavelength is centered at about 545 nm. We believed that this efficient laser will become the most competitive one in the existing commercial green lasers, especially in the laser display, medical treatment and spectroscopic analysis etc.

  17. Alzheimer's Disease Drug Discovery--11th International Conference--Promising New Therapeutic Approaches. 27-28 September 2010, Jersey City, NJ, USA.

    PubMed

    Wolfe, Michael S

    2010-12-01

    The 11th Alzheimer's Disease Drug Discovery International Conference, held in Jersey City, NJ, USA, included topics covering new therapeutic developments in the field of Alzheimer's disease. This conference report highlights selected presentations on the use of patient-specific stem cells, and neuroprotection, regeneration and cognitive enhancement strategies for the prevention or treatment of Alzheimer's disease. Investigational approaches discussed include allopregnanolone for neuron protection and regeneration, PDE5 inhibitors as therapeutics, upregulating the protein Klotho to prevent cognitive decline, targeting memory deficits induced by Aβ42 oligomers, inhibiting striatal-enriched protein tyrosine phosphatase (STEP) for treating neuropsychiatric disorders, and agonism of GABA-A receptors to treat age-related cognitive deficits.

  18. What Good Are Positive Emotions in Crises? A Prospective Study of Resilience and Emotions Following the Terrorist Attacks on the United States on September 11th, 2001

    PubMed Central

    Fredrickson, Barbara L.; Tugade, Michele M.; Waugh, Christian E.; Larkin, Gregory R.

    2009-01-01

    Extrapolating from B. L. Fredrickson's (1998, 2001) broaden-and-build theory of positive emotions, the authors hypothesized that positive emotions are active ingredients within trait resilience. U.S. college students (18 men and 28 women) were tested in early 2001 and again in the weeks following the September 11th terrorist attacks. Mediational analyses showed that positive emotions experienced in the wake of the attacks— gratitude, interest, love, and so forth—fully accounted for the relations between (a) precrisis resilience and later development of depressive symptoms and (b) precrisis resilience and postcrisis growth in psychological resources. Findings suggest that positive emotions in the aftermath of crises buffer resilient people against depression and fuel thriving, consistent with the broaden-and-build theory. Discussion touches on implications for coping. PMID:12585810

  19. What good are positive emotions in crises? A prospective study of resilience and emotions following the terrorist attacks on the United States on September 11th, 2001.

    PubMed

    Fredrickson, Barbara L; Tugade, Michele M; Waugh, Christian E; Larkin, Gregory R

    2003-02-01

    Extrapolating from B. L. Fredrickson's (1998, 2001) broaden-and-build theory of positive emotions, the authors hypothesized that positive emotions are active ingredients within trait resilience. U.S. college students (18 men and 28 women) were tested in early 2001 and again in the weeks following the September 11th terrorist attacks. Mediational analyses showed that positive emotions experienced in the wake of the attacks--gratitude, interest, love, and so forth--fully accounted for the relations between (a) precrisis resilience and later development of depressive symptoms and (b) precrisis resilience and postcrisis growth in psychological resources. Findings suggest that positive emotions in the aftermath of crises buffer resilient people against depression and fuel thriving, consistent with the broaden-and-build theory. Discussion touches on implications for coping.

  20. Langerhans cell histiocytosis or tuberculosis on a medieval child (Oppidum de la Granède, Millau, France - 10th-11th centuries AD).

    PubMed

    Colombo, Antony; Saint-Pierre, Christophe; Naji, Stephan; Panuel, Michel; Coqueugniot, Hélène; Dutour, Olivier

    2015-06-01

    In 2008, a skeleton of a 1 - 2.5-year-old child radiocarbon dated from the 10th - 11th century AD was discovered on the oppidum of La Granède (Millau, France). It presents multiple cranial osteolytic lesions having punched-out or geographical map-like aspects associated with sequestrum and costal osteitis. A multi 3D digital approach (CT, μCT and virtual reconstruction) enabled us to refine the description and identify the diploic origin of the lytic process. Furthermore, precise observation of the extent of the lesions and associated reorganization of the skeletal micro-structure were possible. From these convergent pieces of evidence, the differential diagnosis led to three possibilities: Langerhans cell histiocytosis, tuberculosis, or Langerhans cell histiocytosis and tuberculosis.

  1. Safety evaluation report related to the operation of Watts Bar Nuclear Plant, Units 1 and 2 (Docket Nos. 50-390 and 50-391). Supplement No. 17

    SciTech Connect

    Tam, P.S.

    1995-10-01

    This report supplements the Safety Evaluation Report (SER), NUREG-0847 (June 1982), Supplement No. 1 (September 1982), Supplement No. 2 (January 1984), Supplement No. 3 (January 1985), Supplement No. 4 (March 1985), Supplement No. 5 (November 1990), Supplement No. 6 (April 1991), Supplement No. 7 (September 1991), 1991), Supplement No. 8 (January 1992), Supplement No. 9 (June 1992), Supplement No. 10 (October 1992), Supplement No. 11 (April.1993), Supplement No. 12 (October 1993), Supplement No. 13 (April 1994), Supplement No. 14 (December 1994), Supplement No. 15 (June 1995), and Supplement No. 16 (September 1995) issued by the Office of Nuclear Reactor Regulation of the US Nuclear Regulatory Commission with respect to the application filed by the Tennessee Valley Authority, as applicant and owner, for licenses to operate the Watts Bar Nuclear Plant, Units 1 and 2 (Docket Nos. 50--390 and 50--391). The facility is located in Rhea county, Tennessee, near the Watts Bar Dam on the Tennessee River. In this supplement, NRC examines the significant problems of construction quality and quality assurance effectiveness that led TVA to withdraw its certification in 1985 that Watts Bar Unit I was ready to load fuel. Also discussed are the extensive corrective actions performed by TVA according to its nuclear performance plans and other supplemental programs, and NRC`s extensive oversight to determine whether the Watts Bar Unit 1 construction quality and TVA`s operational readiness and quality assurance effectiveness are adequate for a low-power operating license to be issued. SSER 17 does not address Watts Bar Unit 2, except for the systems which are necessary to support Unit 1 operation.

  2. Justice after September 11th

    ERIC Educational Resources Information Center

    Katz, Stanley N.

    2004-01-01

    Like many of us, Stanley Katz will always remember exactly where he was and what he was doing on the morning of 9-11 as we all watched American life as we had known it implode before our eyes. Here, Katz reflects upon his experiences of the day and how difficult it was to know what students were thinking or feeling about the events. He writes that…

  3. Reliability testing of the Hughes temperature controlled 1/4 watt split cycle cryogenic cooler (HD-1045 (V)/UA)

    NASA Astrophysics Data System (ADS)

    Shaffer, James; Dunmire, Howard; Samuels, Raemon; Trively, Martin

    1989-12-01

    The U.S. Army CECOM Center for Night Vision and Electro-Optics (C2NVEO) is responsible for developing cryogenic coolers for all infrared imaging systems for the Army. C2NVEO also maintains configuration management control of the forward-looking infrared (FLIR) Common Module coolers used in thermal imagers in fielded Army weapon systems such as: M60A3 and M1 Tanks, Bradley Fighting Vehicle (BFV) System, tube-launched, optically tracked, wire-guided (TOW) Missile System, and Army Attack Helicopters. Currently, there are over 30,000 coolers in fielded systems and several thousand more are added each year. C2NVEO conducts development programs and monitors contractor internal research and development efforts to improve cooler performance such as reliability, audio noise, power consumption, and output vibration. The HD-1045 1/4-Watt Split Stirling Cooler was originally designed and developed by the C2NVEO in the early 1970s as a replacement for the gas bottle/cryostat used on the Manportable Common Thermal Night Sights. To date, however, the HD-1045 cooler has been used in the field in the Integrated Sight Unit (ISU) of the BFV System and is currently being used in the Driver Thermal Viewer (DTV) full scale development program. This document describes and reports the results of reliability testing done on Hughes Temperature Controlled 1/4 Watt split Cycle Cryogenic Coolers (HD-1045 (V)/UA), referred to herein as the coolers.

  4. Simulation of Watts Bar Unit 1 Initial Startup Tests with Continuous Energy Monte Carlo Methods

    SciTech Connect

    Godfrey, Andrew T; Gehin, Jess C; Bekar, Kursat B; Celik, Cihangir

    2014-01-01

    The Consortium for Advanced Simulation of Light Water Reactors* is developing a collection of methods and software products known as VERA, the Virtual Environment for Reactor Applications. One component of the testing and validation plan for VERA is comparison of neutronics results to a set of continuous energy Monte Carlo solutions for a range of pressurized water reactor geometries using the SCALE component KENO-VI developed by Oak Ridge National Laboratory. Recent improvements in data, methods, and parallelism have enabled KENO, previously utilized predominately as a criticality safety code, to demonstrate excellent capability and performance for reactor physics applications. The highly detailed and rigorous KENO solutions provide a reliable nu-meric reference for VERAneutronics and also demonstrate the most accurate predictions achievable by modeling and simulations tools for comparison to operating plant data. This paper demonstrates the performance of KENO-VI for the Watts Bar Unit 1 Cycle 1 zero power physics tests, including reactor criticality, control rod worths, and isothermal temperature coefficients.

  5. Photovoltaic frequency–watt curve design for frequency regulation and fast contingency reserves

    DOE PAGES

    Johnson, Jay; Neely, Jason C.; Delhotal, Jarod J.; ...

    2016-09-02

    When renewable energy resources are installed in electricity grids, they typically increase generation variability and displace thermal generator control action and inertia. Grid operators combat these emerging challenges with advanced distributed energy resource (DER) functions to support frequency and provide voltage regulation and protection mechanisms. This paper focuses on providing frequency reserves using autonomous IEC TR 61850-90-7 pointwise frequency-watt (FW) functions that adjust DER active power as a function of measured grid frequency. The importance of incorporating FW functions into a fleet of photovoltaic (PV) systems is demonstrated in simulation. Effects of FW curve design, including curtailment, deadband, and droop,more » were analyzed against performance metrics using Latin hypercube sampling for 20%, 70%, and 120% PV penetration scenarios on the Hawaiian island of Lanai. Finally, to understand the financial implications of FW functions to utilities, a performance function was defined based on monetary costs attributable to curtailed PV production, load shedding, and generator wear. An optimization wrapper was then created to find the best FW function curve for each penetration level. Lastly, it was found that in all cases, the utility would save money by implementing appropriate FW functions.« less

  6. Photovoltaic frequency–watt curve design for frequency regulation and fast contingency reserves

    SciTech Connect

    Johnson, Jay; Neely, Jason C.; Delhotal, Jarod J.; Lave, Matthew

    2016-09-02

    When renewable energy resources are installed in electricity grids, they typically increase generation variability and displace thermal generator control action and inertia. Grid operators combat these emerging challenges with advanced distributed energy resource (DER) functions to support frequency and provide voltage regulation and protection mechanisms. This paper focuses on providing frequency reserves using autonomous IEC TR 61850-90-7 pointwise frequency-watt (FW) functions that adjust DER active power as a function of measured grid frequency. The importance of incorporating FW functions into a fleet of photovoltaic (PV) systems is demonstrated in simulation. Effects of FW curve design, including curtailment, deadband, and droop, were analyzed against performance metrics using Latin hypercube sampling for 20%, 70%, and 120% PV penetration scenarios on the Hawaiian island of Lanai. Finally, to understand the financial implications of FW functions to utilities, a performance function was defined based on monetary costs attributable to curtailed PV production, load shedding, and generator wear. An optimization wrapper was then created to find the best FW function curve for each penetration level. Lastly, it was found that in all cases, the utility would save money by implementing appropriate FW functions.

  7. A Mars 1 Watt vortex wind energy machine

    NASA Technical Reports Server (NTRS)

    Ralston, Michael; Crowley, Christopher; Thomson, Ronald; Gwynne, Owen

    1992-01-01

    A Martian wind power generator capable of surviving impact and fulfilling the long-term (2-5 yr) low-level power requirements (1-2 W) of an unmanned surface probe is presented. Attention is given to a tornado vortex generator that was chosen on the basis of its capability to theoretically augment the available power that may be extracted for average Martian wind speeds of about 7.5 m/s. The generator offers comparable mass-to-power ratios with solar power sources.

  8. Did Osler suffer from "paranoia antitherapeuticum baltimorensis"? A comparative content analysis of The Principles and Practice of Medicine and Harrison's Principles of Internal Medicine, 11th edition.

    PubMed

    Hogan, D B

    1999-10-05

    One of the most important legacies of Sir William Osler was his textbook The Principles and Practice of Medicine. A common criticism of the book when it was first published was its deficiency in the area of therapeutics. In this article, the 1st edition of The Principles and Practice of Medicine is compared with the 11th edition of Harrison's Principles of Internal Medicine. The analysis focuses on the treatment recommendations for 4 conditions that were covered in both books (diabetes mellitus, ischemic heart disease, pneumonia and typhoid fever). Osler's textbook dealt with typhoid fever and pneumonia at greater length, whereas Harrison's placed more emphasis on diabetes mellitus and ischemic heart disease. Notwithstanding Osler's reputation as a therapeutic nihilist, the 2 books devoted equivalent space to treatment (in terms of proportion of total sentences for the conditions). For all conditions except ischemic heart disease, Osler concentrated on general measures and symptomatic care. Throughout Osler's textbook numerous negative comments are made about the medicinal treatment of various conditions. A more accurate statement about Osler's therapeutic approach was that he was a "medicinal nihilist." His demand for proof of efficacy before use of a medication remains relevant.

  9. Possible impacts of early-11th-, middle-12th-, and late-13th-century droughts on western Native Americans and the Mississippian Cahokians

    USGS Publications Warehouse

    Benson, L.V.; Berry, M.S.; Jolie, E.A.; Spangler, J.D.; Stahle, D.W.; Hattori, E.M.

    2007-01-01

    One or more of three intense and persistent droughts impacted some Native American cultures in the early-11th, middle-12th and late-13th centuries, including the Anasazi, Fremont, Lovelock, and Mississippian (Cahokian) prehistorical cultures. Tree-ring-based reconstructions of precipitation and temperature indicate that warm drought periods occurred between AD 990 and 1060, AD 1135 and 1170, and AD 1276 and 1297. These droughts occurred during minima in the Pacific Decadal Oscillation and may have been associated with positive values of the Atlantic Multidecadal Oscillation. Each of the Native American cultures was supported, to a greater or lesser degree, by precipitation-dependent resources. Both the Four Corners region and Cahokia were sites of intense growth between about AD 1050 and 1130, and by AD 1150, cultures in both regions were undergoing stress. By AD 1300 the Anasazi and Fremont cultures had collapsed and their residual populations had either left their homelands or withered. In the case of Fremont populations, the AD 990-1060 drought may have had the greatest impact. This drought also may have affected the Anasazi, for it was at the end of this drought that some people from Chaco migrated to the San Juan River valley and founded the Salmon Ruin great house. Detailed data do not exist on the number of Lovelock habitation sites or populations over time; however, Lovelock populations appear to have retreated from the western Great Basin to California by AD 1300 or shortly thereafter.

  10. Possible impacts of early-11th-, middle-12th-, and late-13th-century droughts on western Native Americans and the Mississippian Cahokians

    NASA Astrophysics Data System (ADS)

    Benson, Larry V.; Berry, Michael S.; Jolie, Edward A.; Spangler, Jerry D.; Stahle, David W.; Hattori, Eugene M.

    2007-02-01

    One or more of three intense and persistent droughts impacted some Native American cultures in the early-11th, middle-12th and late-13th centuries, including the Anasazi, Fremont, Lovelock, and Mississippian (Cahokian) prehistorical cultures. Tree-ring-based reconstructions of precipitation and temperature indicate that warm drought periods occurred between AD 990 and 1060, AD 1135 and 1170, and AD 1276 and 1297. These droughts occurred during minima in the Pacific Decadal Oscillation and may have been associated with positive values of the Atlantic Multidecadal Oscillation. Each of the Native American cultures was supported, to a greater or lesser degree, by precipitation-dependent resources. Both the Four Corners region and Cahokia were sites of intense growth between about AD 1050 and 1130, and by AD 1150, cultures in both regions were undergoing stress. By AD 1300 the Anasazi and Fremont cultures had collapsed and their residual populations had either left their homelands or withered. In the case of Fremont populations, the AD 990-1060 drought may have had the greatest impact. This drought also may have affected the Anasazi, for it was at the end of this drought that some people from Chaco migrated to the San Juan River valley and founded the Salmon Ruin great house. Detailed data do not exist on the number of Lovelock habitation sites or populations over time; however, Lovelock populations appear to have retreated from the western Great Basin to California by AD 1300 or shortly thereafter.

  11. Enhanced syndromic surveillance for mass gatherings in the Pacific: a case study of the 11th Festival of Pacific Arts in Solomon Islands, 2012

    PubMed Central

    Hoy, Damian; Saketa, Salanieta T; Maraka, Roy Roger; Sio, Alison; Wanyeki, Ian; Frison, Pascal; Ogaoga, Divi; Iniakawala, Dennie; Joshua, Cynthia; Duituturaga, Sala; Lepers, Christelle; Roth, Adam; White, Paul; Souares, Yvan

    2016-01-01

    Mass gatherings pose public health challenges to host countries, as they can cause or exacerbate disease outbreaks within the host location or elsewhere. In July 2012, the 11th Festival of Pacific Arts (FOPA), a mass gathering event involving 22 Pacific island states and territories, was hosted by Solomon Islands. An enhanced syndromic surveillance (ESS) system was implemented for the event. Throughout the capital city, Honiara, 15 sentinel sites were established and successfully took part in the ESS system, which commenced one week before the FOPA (25 June) and concluded eight days after the event (22 July). The ESS involved expanding on the existing syndromic surveillance parameters: from one to 15 sentinel sites, from four to eight syndromes, from aggregated to case-based reporting and from weekly to daily reporting. A web-based system was developed to enable data entry, data storage and data analysis. Towards the end of the ESS period, a focus group discussion and series of key informant interviews were conducted. The ESS was considered a success and played an important role in the early detection of possible outbreaks. For the period of the ESS, 1668 patients with syndrome presentations were received across the 15 sentinel sites. There were no major events of public health significance. Several lessons were learnt that are relevant to ESS in mass gathering scenarios, including the importance of having adequate lead in time for engagement and preparation to ensure appropriate policy and institutional frameworks are put in place. PMID:27766181

  12. 11th Workshop on Crystalline Silicon Solar Cell Materials and Processes, Extended Abstracts and Papers, 19-22 August 2001, Estes Park, Colorado

    SciTech Connect

    Sopori, B.

    2001-08-16

    The 11th Workshop will provide a forum for an informal exchange of technical and scientific information between international researchers in the photovoltaic and non-photovoltaic fields. Discussions will include the various aspects of impurities and defects in silicon--their properties, the dynamics during device processing, and their application for developing low-cost processes for manufacturing high-efficiency silicon solar cells. Sessions and panel discussions will review impurities and defects in crystalline-silicon PV, advanced cell structures, new processes and process characterization techniques, and future manufacturing demands. The workshop will emphasize some of the promising new technologies in Si solar cell fabrication that can lower PV energy costs and meet the throughput demands of the future. The three-day workshop will consist of presentations by invited speakers, followed by discussion sessions. Topics to be discussed are: Si Mechanical properties and Wafer Handling, Advanced Topics in PV Fundamentals, Gettering and Passivation, Impurities and Defects, Advanced Emitters, Crystalline Silicon Growth, and Solar Cell Processing. The workshop will also include presentations by NREL subcontractors who will review the highlights of their research during the current subcontract period. In addition, there will be two poster sessions presenting the latest research and development results. Some presentations will address recent technologies in the microelectronics field that may have a direct bearing on PV.

  13. Effect of September 11th terrorist attacks on the self-reported health status of Department of Defense health care beneficiaries.

    PubMed

    Linton, Andrea; Hartzell, Michael C; Peterson, Michael R

    2004-11-01

    This study examined the changes in the self-reported health status of Department of Defense health care beneficiaries associated with the September 11th terrorist attacks. Responses to a single-item, general health measure from pre- and post-September 11 quarterly survey events for the calendar year 2001 were analyzed to compare the unfavorable health response rates before and after the attacks. Increases in rates of unfavorable health status following the terrorist attacks were reported by the total population and 39 of 44 subgroups examined. Statistically significant increases in unfavorable health were reported by active duty personnel and dependents of active duty personnel; beneficiaries under the age of 44 years; beneficiaries affiliated with the Army and Marines; and beneficiaries in the Mid-Atlantic, Mid-West/Central, and Pacific Rim regions. These findings suggest that stress associated with the likelihood of being deployed or having a family member deployed following the terrorist attacks significantly contributed to the increase in unfavorable health response reported on the post-September 11 survey.

  14. Factor structure of posttraumatic stress among Western New York undergraduates following the September 11th terrorist attack on the World Trade Center.

    PubMed

    Baschnagel, Joseph S; O'Connor, Roisin M; Colder, Craig R; Hawk, Larry W

    2005-12-01

    The structure of posttraumatic stress is of both theoretical and clinical interest. In the present study, seven models of posttraumatic stress were compared using confirmatory factor analysis. A sample of 528 Western New York undergraduate students was assessed 1 and 3 months after the September 11th, 2001 terrorist attacks. At the Month 1 assessment, the current three-factor Diagnostic and Statistical Manual of Mental Disorders (DSM-IV; American Psychiatric Association, 1994) model, which consists of Intrusions, Avoidance/Numbing, and Hyperarousal, did not provide a good fit to the data; however, a four-factor model consisting of factors labeled Intrusions, Avoidance, Dysphoria, and Hyperarousal did fit the data well and provided better fit than the three-factor model and other competing models. Importantly, Dysphoria spans symptoms from the traditional DSM Numbing and Hyperarousal clusters. The four-factor model continued to fit the data well at Month 3. These findings parallel the results of earlier studies which suggest that a four-factor model better reflects the nature of posttraumatic stress than do simpler models, including the DSM. The present work is consistent with a dimensional model of stress responses and calls for further longitudinal work in this area.

  15. Tectonic and seismic implications of an intersegment rupture. The damaging May 11th 2011 Mw 5.2 Lorca, Spain, earthquake

    NASA Astrophysics Data System (ADS)

    Martínez-Díaz, José J.; Bejar-Pizarro, Marta; Álvarez-Gómez, José A.; Mancilla, Flor de Lis; Stich, Daniel; Herrera, Gerardo; Morales, Jose

    2012-06-01

    On May 11th 2011, a Mw 5.2 earthquake stroke the city of Lorca in the SE Spain. This event caused 9 fatalities, 300 injuries and serious damage on the city and the surrounding areas. The Lorca earthquake occurred in the vicinity of a region bounding two well-known segments of a large active fault, the Alhama de Murcia fault (AMF). The Lorca earthquake offers a unique opportunity to study how strain is accommodated in an intersegment region of a large strike slip fault. We map recent tectonic structures in the epicentral region and we use radar interferometry to analyze the coseismic deformation. Combining these data with seismological observations of Lorca seismic sequence we first model the source of the earthquake. Then we analyze the influence of our preferred model in the adjacent segments by Coulomb failure stress modeling. The proposed earthquake source model suggests that this event ruptured an area of ~ 4 × 3 km within the complex structure that limits the Goñar-Lorca and Lorca-Totana segments of the AMF. The induced static stress change on the adjacent segments of the fault represents a seismic cycle advance equivalent to 200 to 1000 years of tectonic loading.

  16. 47 CFR 22.867 - Effective radiated power limits.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Effective radiated power limits. The effective radiated power (ERP) of ground and airborne stations... peak ERP of airborne mobile station transmitters must not exceed 12 Watts. (b) The peak ERP of...

  17. 47 CFR 22.867 - Effective radiated power limits.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Effective radiated power limits. The effective radiated power (ERP) of ground and airborne stations... peak ERP of airborne mobile station transmitters must not exceed 12 Watts. (b) The peak ERP of...

  18. 47 CFR 22.867 - Effective radiated power limits.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Effective radiated power limits. The effective radiated power (ERP) of ground and airborne stations... peak ERP of airborne mobile station transmitters must not exceed 12 Watts. (b) The peak ERP of...

  19. 47 CFR 22.867 - Effective radiated power limits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Effective radiated power limits. The effective radiated power (ERP) of ground and airborne stations... peak ERP of airborne mobile station transmitters must not exceed 12 Watts. (b) The peak ERP of...

  20. 47 CFR 22.867 - Effective radiated power limits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Effective radiated power limits. The effective radiated power (ERP) of ground and airborne stations... peak ERP of airborne mobile station transmitters must not exceed 12 Watts. (b) The peak ERP of...

  1. 47 CFR 87.131 - Power and emissions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... watts. 1090 MHz M1D 20 watts. Aircraft data link land test 131.450 MHz, 131.550 MHz, 131.725 MHz, 131... Differential GPS VHF G7D Various. 2 1 The power is measured at the transmitter output terminals and the type...

  2. Building on Family Strengths: Research and Services in Support of Children and Their Families. Proceedings of the Building on Family Strengths Annual Conference (11th, Portland, Oregon, May 6-8, 2004)

    ERIC Educational Resources Information Center

    Gordon, Lynwood J., Ed.; Tullis, Kathryn, Ed.; Hanson, Andrea, Ed.; Sowders, Stacey, Ed.

    2005-01-01

    The 11th Annual Building on Family Strengths Conference was held from May 6th through May 8th, 2004, in Portland, Oregon. Highlights included: (1) The revival of a pre-conference training session; this year featured "Understanding Research and Evaluation in Relation to Social Change," presented by Elaine Slaton and Shannon CrossBear of…

  3. Proceedings of the Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (11th, New Brunswick, New Jersey, September 20-23, 1989), Volume 2: Plenary Lectures and Symposia.

    ERIC Educational Resources Information Center

    Maher, Carolyn A., Ed.; Goldin, Gerald A., Ed.; Davis, Robert B., Ed.

    This document reports on the 11th annual conference of the North American Chapter of the International Group for the Psychology of Mathematics Education (PME-NA). Plenary and response lectures and speakers include: "The Description and Analysis of Mathematical Processes" (Nicolas Herscovics); "To Know Mathematics is to Go Beyond Thinking That…

  4. Comparison of problematic behaviours of 10th and 11th year Southern English adolescents. Part 2: Current drink, drug and sexual activity of children with smoking parents.

    PubMed

    Cox, Malcolm; Pritchard, Colin

    2007-01-01

    To determine parental and school influences upon the behaviour and attitudes of adolescents of smoking versus non-smoking parents and of those "liking and disliking" school. Utilising a self-administered confidential standardised questionnaire, a representative sample of Southern English 10th and 11th year secondary school pupils was obtained. Current drink, drug and sexual behaviour were explored and data on adolescents whose parents smoked was extrapolated and compared against adolescents of non-smoking parents. Pupils reporting "liking school" were compared against those "not liking school" and all results statistically analysed. There were 17% smoking mothers [SM] and 23% smoking fathers [SF]. The focus is upon students of SF whose adolescents are significantly more often engaged in substance misuse (38-18%), drinking in pubs (31%-15%), binge drinking (32%-18%), and under-age sexual activity (27%-14%) plus smoking (51%-32%), truanting (43%-23%), vandalism (32%-22%) and stealing (19%-11%). SM students had higher incidence of sexual behaviour (33%-13%) and unprotected sex (21%-6%). Students of smoking parents were less well informed and had significantly more negative attitudes about social behaviour and responsibility. "Liking school" was associated to significantly lower rates of problematic behaviour, which predominately was not related to the social background of the pupils. The smoking father criteria carries a social class bias, nonetheless these parents need to be aware of the particular behaviour of their children and their increased risk. SF do not "cause" the behaviour rather it reflects something of the nature of the adolescent's relationship to parents, school and society.

  5. Preface: Proceedings of the 11th International Conference on Magnetic Fluids (ICMF 11) (Košice, Slovakia, 23 27 July 2007)

    NASA Astrophysics Data System (ADS)

    Kopčanský, Peter; Timko, Milan; Kováč, Josef; Václavíková, Miroslava; Odenbach, Stefan

    2008-05-01

    The 11th International Conference on Magnetic Fluids (ICMF 11) was held in Košice, Slovakia between 23-27 July 2007. Attendance at the conference was high and its motivation was in line with the ten previous ICMF conferences organized in Udine, Orlando, Bangor, Sendai-Tokyo, Riga, Paris, Bhavnagar, Timisoara, Bremen and Guarujá. The conference in Slovakia reflected the scientific community's enthusiasm and worldwide support, with 256 participants, from 30 countries attending.The main objective of ICMF 11 was to promote progress and knowledge in the field of magnetic fluids regarding their chemistry, physical and magnetic properties, heat and mass transfer, surface phenomena, as well as their technological and biomedical applications. As research on magnetic fluids is essentially interdisciplinary, experts from related areas were invited to present their contributions with a view to increasing knowledge in the field and highlighting new trends. Submitted communications were refereed by members of the Scientific Organizing Committee and abstracts were assembled in a book of abstracts. Participants presented 180 posters in two poster sessions and 56 oral presentations. All presentations contributed to a greater understanding of the area, and helped to bridge the gap between physics, chemistry, technology, biology and medical sciences. Contributions to this conference are presented in 115 scientific papers, with some published in Journal of Physics: Condensed Matter and the rest in Magnetohydrodynamics. The organization of the conference was made possible by generous support from the Institute of Experimental Physics and Institute of Geotechnics of the Slovak Academy of Sciences, the University of Pavol Jozef Šafárik and the Slovak Physical Society. Financial support from Ferrotec, Cryosoft Ltd, Mikrochem, Liquids Research Ltd, Askony and US Steel Košice, is also gratefully acknowledged.

  6. Seismic and tectonic implications of an intersegment rupture. The damaging May 11th 2011 MW 5.2 Lorca, Spain, earthquake.

    NASA Astrophysics Data System (ADS)

    Martínez-Díaz, J. J.; Béjar-Pizarro, M.; Álvarez-Gómez, J. A.; Mancilla, F. L.; Stich, D.; Herrera, G.; Morales, J.

    2012-04-01

    On May 11th 2011 an Mw 5.2 earthquake stroke the city of Lorca in the SE Spain. This caused 9 fatalities, 300 injuries, serious damage on the city and surrounding area. The Lorca earthquake occurred in the vicinity of a region bounding two well-known segments of a large active fault, the Alhama de Murcia fault (AMF). The Lorca earthquake offers a unique opportunity to study how strain is accommodated in an intersegment region of a large strike slip fault. We map recent tectonic structures in the epicentral region and we use radar interferometry to analyze the coseismic deformation. Combining these data with seismological data of the seismic sequence of Lorca we model the source of the earthquake and we analyze the influence of our preferred model in the adjacent segments by Coulomb failure stress modeling. We finally compare our results with topography and fault structure close to the rupture area and discuss the implications for strain accommodation, fault behavior and seismic hazard in the region. The proposed source model of the Lorca earthquake suggest that this event ruptured an area of ~ 4 x 3 km within the complex structure that limits the Goñar-Lorca and Lorca-Totana segments of the AMF. The influence of this earthquake in the stress state of the surrounding segments indicate that the Goñar - Lorca segment is charged at its northern tip and the Lorca - Totana segment is charged at its southern tip. Considering the low slip rate of these faults (between 0.1 and 0.6 mm / yr) the stress change calculated represents a seismic cycle advance equivalent to 200 to 1000 years of tectonic loading. From our results, we propose a hypothesis for the long-term seismogenic behavior of the Lorca intersegment zone in which it behaves like a structural barrier capable of arresting earthquakes that rupture the adjacent segments.

  7. 47 CFR 74.534 - Power limitations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Power limitations. 74.534 Section 74.534... § 74.534 Power limitations. (a) Transmitter output power. (1) Transmitter output power shall be limited..., transmitter output power shall not exceed 10 watts. (b) In no event shall the average equivalent...

  8. 47 CFR 74.534 - Power limitations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Power limitations. 74.534 Section 74.534... § 74.534 Power limitations. (a) Transmitter output power. (1) Transmitter output power shall be limited..., transmitter output power shall not exceed 10 watts. (b) In no event shall the average equivalent...

  9. 47 CFR 74.534 - Power limitations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Power limitations. 74.534 Section 74.534... § 74.534 Power limitations. (a) Transmitter output power. (1) Transmitter output power shall be limited..., transmitter output power shall not exceed 10 watts. (b) In no event shall the average equivalent...

  10. Thermal control of power supplies with electronic packaging techniques. [using low cost heat pipes

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The integration of low-cost commercial heat pipes in the design of a NASA candidate standard modular power supply with a 350 watt output resulted in a 44% weight reduction. Part temperatures were also appreciably reduced, increasing the environmental capability of the unit. A complete 350- watt modular power converter was built and tested to evaluate thermal performance of the redesigned supply.

  11. A LEGO Watt balance: An apparatus to determine a mass based on the new SI

    NASA Astrophysics Data System (ADS)

    Chao, L. S.; Schlamminger, S.; Newell, D. B.; Pratt, J. R.; Seifert, F.; Zhang, X.; Sineriz, G.; Liu, M.; Haddad, D.

    2015-11-01

    A global effort to redefine our International System of Units (SI) is underway, and the change to the new system is expected to occur in 2018. Within the newly redefined SI, the present base units will still exist but be derived from fixed numerical values of seven reference constants. In particular, the unit of mass (the kilogram) will be realized through a fixed value of the Planck constant h. A so-called watt balance, for example, can then be used to realize the kilogram unit of mass within a few parts in 108. Such a balance has been designed and constructed at the National Institute of Standards and Technology. For educational outreach and to demonstrate the principle, we have constructed a LEGO tabletop watt balance capable of measuring a gram-level masses to 1% relative uncertainty. This article presents the design, construction, and performance of the LEGO watt balance and its ability to determine h.

  12. A discussion of Bl conservation on a two dimensional magnetic field plane in watt balances

    NASA Astrophysics Data System (ADS)

    Li, Shisong; Zhao, Wei; Huang, Songling

    2016-05-01

    The watt balance is an experiment being pursued in national metrology institutes for precision determination of the Planck constant h. In watt balances, the 1/r magnetic field, expected to generate a geometrical factor Bl independent to any coil horizontal displacement, can be created by a strict two dimensional, symmetric (horizontal r and vertical z) construction of the magnet system. In this paper, we present an analytical understanding of magnetic field distribution when the r symmetry of the magnet is broken and the establishment of the Bl conservation is shown. By using either Gauss’s law on magnetism with monopoles or conformal transformations, we extend the Bl conservation to arbitrary two dimensional magnetic planes where the vertical magnetic field component equals zero. The generalized Bl conservation allows a relaxed physical alignment criteria for watt balance magnet systems.

  13. Assessment of Pellet-Clad Interaction Indicators in Watts Bar Unit 1 using the VERA Framework

    SciTech Connect

    Stimpson, Shane G; Powers, Jeffrey J; Clarno, Kevin T; Pawlowski, Roger; Bratton, Ryan

    2015-01-01

    The Consortium for Advanced Simulation of Light Water Reactors (CASL) aims to provide high-fidelity, multiphysics simulations of light water reactors (LWRs) by coupling a variety of codes within the Virtual Environment for Reactor Analysis (VERA). One of the primary goals of CASL is to predict local cladding failure through pellet-clad interaction (PCI). This capability is currently being pursued through several different approaches, such as with Tiamat, which is a simulation tool within VERA that more tightly couples the MPACT neutron transport solver, the CTF thermal hydraulics solver, and the MOOSE-based Bison-CASL fuel performance code. However, the process in this paper focuses on running fuel performance calculations with Bison-CASL to predict PCI using the multicycle output data from coupled neutron transport/thermal hydraulics simulations. In recent work within CASL, Watts Bar Unit 1 has been simulated over 12 cycles using the VERA core simulator capability based on MPACT and CTF. Using the output from these simulations, Bison-CASL results can be obtained without rerunning all 12 cycles, while providing some insight into PCI indicators. Multi-cycle Bison-CASL results are presented and compared against results from the FRAPCON fuel performance code. There are several quantities of interest in considering PCI and subsequent fuel rod failures, such as the clad hoop stress and maximum centerline fuel temperature, particularly as a function of time. Bison-CASL performs single-rod simulations using representative power and temperature distributions, providing high-resolution results for these and a number of other quantities. This will assist in identifying fuels rods as potential failure locations for use in further analyses.

  14. Life test result of Ricor K529N 1watt linear cryocooler

    NASA Astrophysics Data System (ADS)

    Nachman, Ilan; Veprik, Alexander; Pundak, Nachman

    2007-04-01

    The authors summarize the results of the accelerated life testing of the Ricor type K529N 1 Watt linear split Stirling cooler. The test was conducted in the period 2003-2006, during which the cooler accumulated in excess of 27,500 working hours at an elevated ambient temperature, which is equivalent to 45,000 hours at normal ambient conditions, and performed about 7,500 operational cycles including cooldown and steady-state phases. The cryocooler performances were assessed through the cooldown time and power consumption; no visible degradation in performances was observed. After the cooler failure and the compressor disassembling, an electrical short was discovered in the driving coil. The analysis has shown that the wire insulating varnish was not suitable for such elevated temperatures. It is important to note that the cooler under test was taken from the earliest engineering series; in the later manufacturing line military grade wire with high temperature insulation was used, no customer complaints have been recorded in this instance Special attention was paid to the thorough examination of the technical condition of the critical components of the cooler interior. In particular, dynamic piston-cylinder seal, flying leads, internal O-rings and driving coil were examined in the compressor. As to the cold head, we focused on studying the conditions of the dynamic bushing-plunger seal, O-rings and displacer-regenerator. In addition, a leak test was performed to assess the condition of the metallic crushed seals. From the analysis, the authors draw the conclusion that the cooler design is adequate for long life performance (in excess of 20,000 working hours) applications.

  15. 3 GHz, watt-level femtosecond Raman soliton source.

    PubMed

    Lim, Jinkang; Chen, Hung-Wen; Xu, Shanhui; Yang, Zhongmin; Chang, Guoqing; Kärtner, Franz X

    2014-04-01

    We demonstrate a 3 GHz repetition rate, femtosecond Raman soliton source with its wavelength tunable from 1.15 to 1.35 μm. We investigate the dependence of Raman soliton formation on different photonic-crystal fibers (PCFs), input powers, and fiber lengths. To produce a Raman soliton peaking at the same wavelength, shorter PCFs demand higher input average powers and consequently generate stronger Raman soliton pulses. Using 30 cm PCF NL-3.2-945, the resulting Raman soliton pulse at 1.35 μm has 0.9 W average power. The integrated relative intensity noise of the Raman soliton pulse at 1.35 μm generated from the 54-cm PCF NL-3.2-945 is as low as 0.33% from 100 Hz to 10 MHz.

  16. Hundred-watt diode laser source by spectral beam combining

    NASA Astrophysics Data System (ADS)

    Zhang, Jun; Peng, Hangyu; Liu, Yun; Qin, Li; Cao, Junsheng; Shan, Xiaonan; Zeng, Yugang; Fu, Xihong; Tong, Cunzhu; Ning, Yongqiang; Wang, Lijun

    2014-12-01

    A diode laser source with a continuous wavelength (CW) power of 106 W and the beam quality M2 of 14.6 is demonstrated by spectrum beam combining (SBC) of three 800 nm LDAs. With the help of relay optics, a wavelength interval of 0.21 nm and a whole spectrum span of 13.9 nm are achieved, which is almost 10 times narrower than those of the structure without the relay optics. This presents a method to obtain a high power and high beam quality SBC laser source with a narrow spectrum.

  17. Random walk in degree space and the time-dependent Watts-Strogatz model.

    PubMed

    Casa Grande, H L; Cotacallapa, M; Hase, M O

    2017-01-01

    In this work, we propose a scheme that provides an analytical estimate for the time-dependent degree distribution of some networks. This scheme maps the problem into a random walk in degree space, and then we choose the paths that are responsible for the dominant contributions. The method is illustrated on the dynamical versions of the Erdős-Rényi and Watts-Strogatz graphs, which were introduced as static models in the original formulation. We have succeeded in obtaining an analytical form for the dynamics Watts-Strogatz model, which is asymptotically exact for some regimes.

  18. Random walk in degree space and the time-dependent Watts-Strogatz model

    NASA Astrophysics Data System (ADS)

    Casa Grande, H. L.; Cotacallapa, M.; Hase, M. O.

    2017-01-01

    In this work, we propose a scheme that provides an analytical estimate for the time-dependent degree distribution of some networks. This scheme maps the problem into a random walk in degree space, and then we choose the paths that are responsible for the dominant contributions. The method is illustrated on the dynamical versions of the Erdős-Rényi and Watts-Strogatz graphs, which were introduced as static models in the original formulation. We have succeeded in obtaining an analytical form for the dynamics Watts-Strogatz model, which is asymptotically exact for some regimes.

  19. How to "Kill a Watt" and Save Energy

    ERIC Educational Resources Information Center

    Massiha, G. H.; Houston, Shelton; Rawat, Kuldeep S.

    2011-01-01

    Many technology students--and especially those interested in environmental and energy issues--can benefit from learning about power ratings and the energy usage of electrical systems like the electrical equipment and appliances found in most homes. Students enrolled in electronics and construction technology courses learn to determine the power…

  20. The 11th Century Collapse of Aqaba on the North Coast of the Gulf of Aqaba, Dead Sea Fault System, Jordan

    NASA Astrophysics Data System (ADS)

    Niemi, Tina; Allison, Alivia; Rucker, John

    2010-05-01

    The city of Aqaba is situated at the northern end of the Gulf of Aqaba along the southern part of the Dead Sea Transform Fault. Based both on the historical accounts and archaeological excavations, it is clear that earthquakes have played a significant role in the history of the region. The early Islamic city of Ayla was probably founded around 650 A.D., suffered some damage as a result of the 748 A.D. earthquake, and saw extensive reconstruction around the beginning of the Abbasid period (Whitcomb, 1994). Among other evidence of earthquake destruction at the Islamic city of Ayla is the leaning city Sea wall. Stratified pottery collections from our February 2009 excavation of the buttress of the city wall of Ayla strongly suggest a date for revetment construction in the early 11th Century. Based on the fact that the most recent pottery from sealed loci inside the buttress wall is late Abbasid - Fatimid and the absence of handmade pottery often found in the abandonment phases, the buttress was likely constructed after liquefaction damage from the 1033 earthquake. Damage from distant source earthquakes (748 and 1033) in the ancient city was repaired in antiquity. The destruction and loss of life (accounts claim that all but 12 residents who had been out fishing were killed) caused by the 1068 earthquake may account for the relative ease with which Baldwin I of Jerusalem took over when he arrived with a small retinue in 1116 A.D. Paleoseismic trenches in the modern city of Aqaba indicate that at least two earthquakes have occurred after deposits dated to 1045-1278 A.D. A preliminary analysis of the stratigraphy in new trenches in the Taba sabkha north of Aqaba shows at least three separate faulting events, with the most recent event located at a depth of 70 cm below the ground surface. This finding supports the initial ground penetrating radar survey conducted at the southern end of the Taba sabkha by Abueladas (2005). These data document a long period of quiescence

  1. New contributions to the debate on the cause of the January 11th, 1693 tsunami in eastern Sicily (Italy): earthquake or offshore landslide source (or may be both)?

    NASA Astrophysics Data System (ADS)

    Armigliato, A.; Tinti, S.; Zaniboni, F.; Pagnoni, G.; Argnani, A.

    2007-12-01

    Eastern Sicily is among the most exposed regions in Italy and in the whole Mediterranean to tsunami hazard and risk. The historical tsunamis recorded here were generally associated to moderate-to-large magnitude earthquakes. The largest tsunami documented in the area occurred on January 11th, 1693. It followed the highest-magnitude earthquake (7.4) of the Italian seismic history. The tsunami, whose first significant motion was a retreat along the entire eastern Sicily coastline, produced the most devastating effects at Augusta (15 meters run-up) and Catania, being relevant at Siracusa and Messina too. A lively debate exists on whether the earthquake was the only source of the tsunami, or other causes (such as submarine landslides, possibly triggered by the earthquake) contributed to the tsunami generation. In the framework of the EC funded project TRANSFER, we investigate both hypotheses, starting from suitable onshore and offshore faults as well as from offshore landslide bodies, and hence simulating numerically the ensuing tsunami and comparing the results with the available historical information. We base on the results obtained during recent offshore surveys, in particular the multichannel seismic survey MESC2001, carried out in year 2001 on board the R/V Urania of the Italian National Council of Researches (CNR), which mapped both active normal faults and a number of possible landslide bodies along the Hyblaean-Malta escarpment, the most prominent tectonic structure found just few kilometres offshore eastern Sicily. From the modelling point of view, the initial condition for the earthquake- generated tsunamis coincides with the vertical coseismic deformation of the seafloor. Instead, the landslide motion is simulated through the Lagrangian block model UBO-BLOCK2, developed at the University of Bologna. Finally, the finite-element code UBO-TSUFE, implemented by the same research team, is used to simulate the tsunami generation and propagation. The main

  2. Productive Resources in Students' Ideas about Energy: An Alternative Analysis of Watts' Original Interview Transcripts

    ERIC Educational Resources Information Center

    Harrer, Benedikt W.; Flood, Virginia J.; Wittmann, Michael C.

    2013-01-01

    For over 30 years, researchers have investigated students' ideas about energy with the intent of reforming instructional practice. In this pursuit, Watts contributed an influential study with his 1983 paper "Some alternative views of energy" ["Phys. Educ." 18, 213 (1983)]. Watts' "alternative frameworks"…

  3. Rock the Watt: An Energy Conservation Campaign at Pacific Northwest National Lab

    SciTech Connect

    2016-01-01

    Case study describes Pacific Northwest National Laboratory's (PNNL) three-month Rock the Watt campaign to reduce energy use at its main campus in Richland, Washington. The campaign objectives were to educate PNNL employees about energy conservation opportunities in their workplace and to motivate them to help PNNL save energy and costs and to reduce greenhouse gas emissions.

  4. 75 FR 6257 - Watts Bar Reservoir Land Management Plan, Loudon, Meigs, Rhea, and Roane Counties, TN

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-08

    ...), Industrial (Zone 5), Developed Recreation (Zone 6), and Shoreline Access (Zone 7). The allocations were made... public land for management on Watts Bar Reservoir. At full pool, the reservoir shoreline length is 721 miles, and the surface area is about 39,000 acres. Approximately 47 percent of this shoreline is...

  5. Heuristics can produce surprisingly rational probability estimates: Comment on Costello and Watts (2014).

    PubMed

    Nilsson, Håkan; Juslin, Peter; Winman, Anders

    2016-01-01

    Costello and Watts (2014) present a model assuming that people's knowledge of probabilities adheres to probability theory, but that their probability judgments are perturbed by a random noise in the retrieval from memory. Predictions for the relationships between probability judgments for constituent events and their disjunctions and conjunctions, as well as for sums of such judgments were derived from probability theory. Costello and Watts (2014) report behavioral data showing that subjective probability judgments accord with these predictions. Based on the finding that subjective probability judgments follow probability theory, Costello and Watts (2014) conclude that the results imply that people's probability judgments embody the rules of probability theory and thereby refute theories of heuristic processing. Here, we demonstrate the invalidity of this conclusion by showing that all of the tested predictions follow straightforwardly from an account assuming heuristic probability integration (Nilsson, Winman, Juslin, & Hansson, 2009). We end with a discussion of a number of previous findings that harmonize very poorly with the predictions by the model suggested by Costello and Watts (2014).

  6. Lives in the Balance: Youth, Poverty, and Education in Watts. SUNY Series, Urban Voices, Urban Visions.

    ERIC Educational Resources Information Center

    Diver-Stamnes, Ann C.

    This analysis of causes of poverty in the Watts section of Los Angeles (California) and other inner-city communities and of the effects of poverty on children considers exogenous factors that affect lives and behaviors, focusing on the situations of high school students. The first five chapters are arranged around issues cited by those who blame…

  7. 78 FR 53494 - Dam Safety Modifications at Cherokee, Fort Loudoun, Tellico, and Watts Bar Dams

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-29

    ... of Dam Structures: Combination of Concrete Floodwalls and Earthen Embankments, will protect the four... Watts Bar). TVA also installed a permanent concrete apron on approximately 2 acres of the downstream...--Permanent Modifications of Dam Structures: Combination of Concrete Floodwalls and Earthen Embankments....

  8. 77 FR 71454 - Notice of Atomic Safety And Licensing Board Reconstitution, Tennessee Valley Authority (Watts Bar...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-30

    ... COMMISSION Notice of Atomic Safety And Licensing Board Reconstitution, Tennessee Valley Authority (Watts Bar, Unit 2) Pursuant to 10 CFR 2.313(c) and 2.321(b), the Atomic Safety and Licensing Board (Board) in the... 16th day of November 2012. E. Roy Hawkens, Chief Administrative Judge, Atomic Safety and...

  9. Confronting the Nation's Urban Crisis: From Watts (1965) to South Central Los Angeles (1992).

    ERIC Educational Resources Information Center

    Peterson, George E.; And Others

    What has been learned about making cities better since civil disturbances first arose in American cities is summarized, and guidelines are offered for constructing an urban agenda for improvement. In some respects the country has made real progress since the Watts riots, but in other areas, conditions are unambiguously worse, with increasing…

  10. US-Japan workshop on field-reversed configurations with steady-state high-temperature fusion plasmas and the 11th US-Japan workshop on compact toroids

    SciTech Connect

    Barnes, D.C.; Fernandez, J.C.; Rej, D.J.

    1990-05-01

    The US-Japan Workshop on Field-Reversed Configurations with Steady-State High-Temperature Fusion Plasma and the 11th US-Japan Workshop on Compact Toroids were held at Los Alamos National Laboratory, Los Alamos, New Mexico on November 7--9, 1989. These proceedings contain the papers presented at the workshops as submitted by the authors. These papers have been indexed separately.

  11. The Voyager spacecraft /James Watt International Gold Medal Lecture/

    NASA Technical Reports Server (NTRS)

    Heacock, R. L.

    1980-01-01

    The Voyager Project background is reviewed with emphasis on selected features of the Voyager spacecraft. Investigations by the Thermo-electric Outer Planets Spacecraft Project are discussed, including trajectories, design requirements, and the development of a Self Test and Repair computer, and a Computer Accessed Telemetry System. The design and configuration of the spacecraft are described, including long range communications, attitude control, solar independent power, sequencing and control data handling, and spacecraft propulsion. The development program, maintained by JPL, experienced a variety of problems such as design deficiencies, and process control and manufacturing problems. Finally, the spacecraft encounter with Jupiter is discussed, and expectations for the Saturn encounter are expressed.

  12. Computer Power: Part 1: Distribution of Power (and Communications).

    ERIC Educational Resources Information Center

    Price, Bennett J.

    1988-01-01

    Discussion of the distribution of power to personal computers and computer terminals addresses options such as extension cords, perimeter raceways, and interior raceways. Sidebars explain: (1) the National Electrical Code; (2) volts, amps, and watts; (3) transformers, circuit breakers, and circuits; and (4) power vs. data wiring. (MES)

  13. Multi-watt 589nm fiber laser source

    SciTech Connect

    DAWSON, J W; DROBSHOFF, A D; BEACH, R J; MESSERLY, M J; PAYNE, S A; BROWN, A; PENNINGTON, D M; BAMFORD, D J; SHARPE, S J; COOK, D J

    2006-01-19

    We have demonstrated 3.5W of 589nm light from a fiber laser using periodically poled stoichiometric Lithium Tantalate (PPSLT) as the frequency conversion crystal. The system employs 938nm and 1583nm fiber lasers, which were sum-frequency mixed in PPSLT to generate 589nm light. The 938nm fiber laser consists of a single frequency diode laser master oscillator (200mW), which was amplified in two stages to >15W using cladding pumped Nd{sup 3+} fiber amplifiers. The fiber amplifiers operate at 938nm and minimize amplified spontaneous emission at 1088nm by employing a specialty fiber design, which maximizes the core size relative to the cladding diameter. This design allows the 3-level laser system to operate at high inversion, thus making it competitive with the competing 1088nm 4-level laser transition. At 15W, the 938nm laser has an M{sup 2} of 1.1 and good polarization (correctable with a quarter and half wave plate to >15:1). The 1583nm fiber laser consists of a Koheras 1583nm fiber DFB laser that is pre-amplified to 100mW, phase modulated and then amplified to 14W in a commercial IPG fiber amplifier. As a part of our research efforts we are also investigating pulsed laser formats and power scaling of the 589nm system. We will discuss the fiber laser design and operation as well as our results in power scaling at 589nm.

  14. A 20 GHz, 75 watt, helix TWT for space communications

    NASA Astrophysics Data System (ADS)

    Heney, J. F.; Tamashiro, R. N.

    A space-qualified, helix-type traveling wave tube is being developed for satellite communication systems in the frequency band of 17.7 to 21.2 GHz. The design approach stresses very high efficiency operation, but with very low distortion. The tube provides multi-mode operation, permitting CW saturated power output levels of 75, 40, and 7.5 W. Operation is also anticipated at 5 dB below these saturation levels to achieve the required low distortion levels. Advanced construction features include a five-stage depressed collector, a diamond supported helix slow-wave circuit, and a type M dispenser cathode. High reliability and long life (10 yr) are objectives of the tube design. Preliminary test results on early developmental models of this tube are very encouraging. An output power of 75 to 90 W has been achieved over the full bandwidth with about 40 dB of saturated gain. More importantly, the basic electronic efficiency of the interaction process has been increased from about 7.5-11 percent by the use of the diamond helix support compared to earlier tubes using BeO support rods. This effort is supported by NASA Lewis Research Center and is aimed toward application in the NASA Advanced Communications Satellite Technology Program.

  15. Multi-watt 589nm fiber laser source

    NASA Astrophysics Data System (ADS)

    Dawson, Jay W.; Drobshoff, Alex D.; Beach, Raymond J.; Messerly, Michael J.; Payne, Stephen A.; Brown, Aaron; Pennington, Deanna M.; Bamford, Douglas J.; Sharpe, Scott J.; Cook, David J.

    2006-02-01

    We have demonstrated 3.5W of 589nm light from a fiber laser using periodically poled stoichio-metric Lithium Tantalate (PPSLT) as the frequency conversion crystal. The system employs 938nm and 1583nm fiber lasers, which were sum-frequency mixed in PPSLT to generate 589nm light. The 938nm fiber laser consists of a single frequency diode laser master oscillator (200mW), which was amplified in two stages to >15W using cladding pumped Nd 3+ fiber amplifiers. The fiber amplifiers operate at 938nm and minimize amplified spontaneous emission at 1088nm by employing a specialty fiber design, which maximizes the core size relative to the cladding diameter. This design allows the 3-level laser system to operate at high inversion, thus making it competitive with the 1088nm 4-level laser transition. At 15W, the 938nm laser has an M2 of 1.1 and good polarization (correctable with a quarter and half wave plate to >15:1). The 1583nm fiber laser consists of a Koheras 1583nm fiber DFB laser that is pre-amplified to 100mW, phase modulated and then amplified to 14W in a commercial IPG fiber amplifier. As a part of our research efforts we are also investigating pulsed laser formats and power scaling of the 589nm system. We will discuss the fiber laser design and operation as well as our results in power scaling at 589nm.

  16. Watt-level passively Q-switched double-cladding fiber laser based on graphene oxide saturable absorber.

    PubMed

    Yu, Zhenhua; Song, Yanrong; Dong, Xinzheng; Li, Yanlin; Tian, Jinrong; Wang, Yonggang

    2013-10-10

    A watt-level passively Q-switched ytterbium-doped double-cladding fiber laser with a graphene oxide (GO) absorber was demonstrated. The structure of the GO saturable absorber mirror (GO-SAM) was of the sandwich type. A maximum output power of 1.8 W was obtained around a wavelength of 1044 nm. To the best of our knowledge, this is the highest output power in Q-switched fiber lasers based on a GO saturable absorber. The pure GO was protected from the oxygen in the air so that the damage threshold of the GO-SAM was effectively raised. The gain fiber was a D-shaped ytterbium-doped double-cladding fiber. The pulse repetition rates were tuned from 120 to 215 kHz with pump powers from 3.89 to 7.8 W. The maximum pulse energy was 8.37 μJ at a pulse width of 1.7 μs.

  17. PREFACE: 11th Asia-Pacific Conference on Plasma Science and Technology (APCPST-11) and 25th Symposium on Plasma Science for Materials (SPSM-25)

    NASA Astrophysics Data System (ADS)

    Watanabe, Takayuki; Kaneko, Toshio; Sekine, Makoto; Tanaka, Yasunori

    2013-06-01

    The 11th Asia-Pacific Conference on Plasma Science and Technology (APCPST-11) was held in Kyoto, Japan on 2-5 October 2012 with the 25th Symposium on Plasma Science for Materials (SPSM-25). SPSM has been held annually since 1988 under the sponsorship of The 153rd Committee on Plasma Materials Science, Japan Society for the Promotion of Science (JSPS). This symposium is one of the major activities of the Committee, which is organized by researchers in academia and industry for the purpose of advancing intersectional scientific information exchange and discussion of science and technology of plasma materials processing. APCPST and SPSM are jointly held biennially to survey the current status of low temperature and thermal plasma physics and chemistry for industrial applications. The whole area of plasma processing was covered from fundamentals to applications. Previous meetings were held in China, Japan, Korea, and Australia, attended by scientists from the Asia-Pacific and other countries. The joint conference was organized in plenary lectures, invited, contributed oral presentations and poster sessions. At this meeting, we had 386 participants from 10 countries and 398 presentations, including 26 invited presentations. This year, we arranged special topical sessions that covered green innovation, life innovation, and technical reports from industry. This conference seeks to bring the plasma community together and to create a forum for discussing the latest developments and issues, the challenges ahead in the field of plasma research and applications among engineers and scientists in Asia, the Pacific Rim, as well as Europe. This volume presents 44 papers that were selected via a strict peer-review process from full papers submitted for the proceedings of the conference. The topics range from the basic physics and chemistry of plasma processing to a broad variety of materials processing and environmental applications. This volume offers an overview of recent

  18. Fourier and Wavelet Based Characterisation of the Ionospheric Response to the Solar Eclipse of August, the 11th, 1999, Measured Through 1-minute Vertical Ionospheric Sounding

    NASA Astrophysics Data System (ADS)

    Sauli, P.; Abry, P.; Boska, J.

    2004-05-01

    The aim of the present work is to study the ionospheric response induced by the solar eclipse of August, the 11th, 1999. We provide Fourier and wavelet based characterisations of the propagation of the acoustic-gravity waves induced by the solar eclipse. The analysed data consist of profiles of electron concentration. They are derived from 1-minute vertical incidence ionospheric sounding measurements, performed at the Pruhonice observatory (Czech republic, 49.9N, 14.5E). The chosen 1-minute high sampling rate aims at enabling us to specifically see modes below acoustic cut-off period. The August period was characterized by Solar Flux F10.7 = 128, steady solar wind, quiet magnetospheric conditions, a low geomagnetic activity (Dst index varies from -10 nT to -20 nT, Σ Kp index reached value of 12+). The eclipse was notably exceptional in uniform solar disk. These conditions and fact that the culmination of the solar eclipse over central Europe occurred at local noon are such that the observed ionospheric response is mainly that of the solar eclipse. We provide a full characterization of the propagation of the waves in terms of times of occurrence, group and phase velocities, propagation direction, characteristic period and lifetime of the particular wave structure. However, ionospheric vertical sounding technique enables us to deal with vertical components of each characteristic. Parameters are estimated combining Fourier and wavelet analysis. Our conclusions confirm earlier theoretical and experimental findings, reported in [Altadill et al., 2001; Farges et al., 2001; Muller-Wodarg et al.,1998] regarding the generation and propagation of gravity waves and provide complementary characterisation using wavelet approaches. We also report a new evidence for the generation and propagation of acoustic waves induced by the solar eclipse through the ionospheric F region. Up to our knowledge, this is the first time that acoustic waves can be demonstrated based on ionospheric

  19. Thermal Simulation of Switching Pulses in an Insulated Gate Bipolar Transistor (IGBT) Power Module

    DTIC Science & Technology

    2015-02-01

    Ovrebo Sensors and Electron Devices Directorate, ARL Approved for public release...pulses with currents of several hundred amperes and power dissipation of hundreds of watts (Ws). Such power switching may be used in Army electronics

  20. The Jefferson Lab High Power THz User Facility

    SciTech Connect

    John Klopf; Amelia Greer; Joseph Gubeli; George Neil; Michelle D. Shinn; Timothy Siggins; David W. Waldman; Gwyn Williams; Alan Todd; Vincent Christina; Oleg Chubar

    2007-04-27

    We describe here, a high power (100 Watt average, 10 MW peak) broadband THz facility based on emission from sub-picosecond bunches of relativistic electrons and the beam transport system that delivers this beam in to a user laboratory.

  1. PREFACE: Proceedings of the 11th European Workshop of the European Microbeam Analysis Society (EMAS) on Modern Developments and Applications in Microbeam Analysis

    NASA Astrophysics Data System (ADS)

    2010-07-01

    This volume of IOP Conference Series: Materials Science and Engineering contains papers from the 11th Workshop of the European Microbeam Analysis Society (EMAS) on Modern Developments and Applications in Microbeam Analysis which took place from 10-14 May 2009 in the Hotel Faltom, Gdynia, Poland. The primary aim of this series of workshops is to assess the state-of-the-art and reliability of microbeam analysis techniques. The workshops also provide a forum where students and young scientists starting out on careers in microbeam analysis can meet and discuss with the established experts. The workshops have a very distinct format comprising invited plenary lectures by internationally recognized experts, poster presentations by the participants and round table discussions on the key topics led by specialists in the field. For this workshop EMAS invited speakers on the following topics: EPMA, EBSD, fast energy-dispersive X-ray spectroscopy, three-dimensional microanalysis, and micro-and nanoanalysis in the natural resources industry. The continuing relevance of the EMAS workshops and the high regard in which they are held internationally can be seen from the fact that 69 posters from 16 countries were on display at the meeting and that the participants came from as far away as Japan and the USA. A number of participants with posters were invited to give short oral presentations of their work in two dedicated sessions. As at previous workshops there was also a special oral session for young scientists. Small cash prizes were awarded for the three best posters and for the best oral presentation by a young scientist. The prize for the best poster went to the contribution by G Tylko, S Dubchak, Z Banach and K Turnau, entitled Monte Carlo simulation for an assessment of standard validity and quantitative X-ray microanalysis in plant. Joanna Wojewoda-Budka of the Institute of Metallurgy and Materials Science, Krakow, received the prize for the best oral presentation by a

  2. 75 FR 51987 - Birch Power Company and Sorenson Engineering; Birch Power Company and Sorenson Leasing L.L.C...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-24

    ... Sorenson Leasing L.L.C.; Notice of Application for Transfer of License, and Soliciting Comments and Motions... (transferors) and Birch Power Company and Sorenson Leasing, L.L.C. (transferees) filed an application for..., Birch Power Company, Sorenson Engineering, and Sorenson Leasing L.L.C., 5203 South 11th East,...

  3. Optimization of solar cell contacts by system cost-per-watt minimization

    NASA Technical Reports Server (NTRS)

    Redfield, D.

    1977-01-01

    New, and considerably altered, optimum dimensions for solar-cell metallization patterns are found using the recently developed procedure whose optimization criterion is the minimum cost-per-watt effect on the entire photovoltaic system. It is also found that the optimum shadow fraction by the fine grid is independent of metal cost and resistivity as well as cell size. The optimum thickness of the fine grid metal depends on all these factors, and in familiar cases it should be appreciably greater than that found by less complete analyses. The optimum bus bar thickness is much greater than those generally used. The cost-per-watt penalty due to the need for increased amounts of metal per unit area on larger cells is determined quantitatively and thereby provides a criterion for the minimum benefits that must be obtained in other process steps to make larger cells cost effective.

  4. Fractional watt Vuillemier cryogenic refrigerator program engineering notebook. Volume 2: Stress analysis

    NASA Technical Reports Server (NTRS)

    Miller, W. S.

    1974-01-01

    A structural analysis performed on the 1/4-watt cryogenic refrigerator. The analysis covered the complete assembly except for the cooling jacket and mounting brackets. Maximum stresses, margin of safety, and natural frequencies were calculated for structurally loaded refrigerator components shown in assembly drawings. The stress analysis indicates that the design is satisfactory for the specified vibration environment, and the proof, burst, and normal operating loads.

  5. Monitoring bald eagles using lists of nests: Response to Watts and Duerr

    USGS Publications Warehouse

    Sauer, John R.; Otto, Mark C.; Kendall, William L.; Zimmerman, Guthrie S.

    2011-01-01

    The post-delisting monitoring plan for bald eagles (Haliaeetus leucocephalus) roposed use of a dual-frame sample design, in which sampling of known nest sites in combination with additional area-based sampling is used to estimate total number of nesting bald eagle pairs. Watts and Duerr (2010) used data from repeated observations of bald eagle nests in Virginia, USA to estimate a nest turnover rate and used this rate to simulate decline in number of occupied nests in list nests over time. Results of Watts and Duerr suggest that, given the rates of loss of nests from the list of known nest sites in Virginia, the list information will be of little value to sampling unless lists are constantly updated. Those authors criticize the plan for not placing sufficient emphasis on updating and maintaining lists of bald eagle nests. Watts and Duerr's metric of turnover rate does not distinguish detectability or temporary nonuse of nests from permanent loss of nests and likely overestimates turnover rate. We describe a multi-state capture–recapture model that allows appropriate estimation of rates of loss of nests, and we use the model to estimate rates of loss from a sample of nests from Maine, USA. The post-delisting monitoring plan addresses the need to maintain and update the lists of nests, and we show that dual frame sampling is an effective approach for sampling nesting bald eagle populations.

  6. Realistic Specific Power Expectations for Advanced Radioisotope Power Systems

    NASA Technical Reports Server (NTRS)

    Mason, Lee S.

    2006-01-01

    Radioisotope Power Systems (RPS) are being considered for a wide range of future NASA space science and exploration missions. Generally, RPS offer the advantages of high reliability, long life, and predictable power production regardless of operating environment. Previous RPS, in the form of Radioisotope Thermoelectric Generators (RTG), have been used successfully on many NASA missions including Apollo, Viking, Voyager, and Galileo. NASA is currently evaluating design options for the next generation of RPS. Of particular interest is the use of advanced, higher efficiency power conversion to replace the previous thermoelectric devices. Higher efficiency reduces the quantity of radioisotope fuel and potentially improves the RPS specific power (watts per kilogram). Power conversion options include Segmented Thermoelectric (STE), Stirling, Brayton, and Thermophotovoltaic (TPV). This paper offers an analysis of the advanced 100 watt-class RPS options and provides credible projections for specific power. Based on the analysis presented, RPS specific power values greater than 10 W/kg appear unlikely.

  7. Power conditioning unit for photovoltaic power systems

    NASA Astrophysics Data System (ADS)

    Beghin, G.; Nguyen Phuoc, V. T.

    Operational features and components of a power conditioning unit for interconnecting solar cell module powers with a utility grid are outlined. The two-stage unit first modifies the voltage to desired levels on an internal dc link, then inverts the current in 2 power transformers connected to a vector summation control to neutralize harmonic distortion up to the 11th harmonic. The system operates in parallel with the grid with extra inductors to absorb line-to-line voltage and phase differences, and permits peak power use from the PV array. Reactive power is gained internally, and a power system controller monitors voltages, frequencies, and currents. A booster preregulator adjusts the input voltage from the array to provide voltage regulation for the inverter, and can commutate 450 amps. A total harmonic distortion of less than 5 percent is claimed, with a rating of 5 kVA, 50/60 Hz, 3-phase, and 4-wire.

  8. Environmental Test Report on the CTI-Cryogenics 1-Watt Integral Stirling Cooler (Long Life HD-1033D)

    DTIC Science & Technology

    1989-04-01

    Continue on reverse if necessary and identify by block numbef)-"•-- ,., FIELD GRU u-ou SI Cryocooler , Stirling Cycle, Clearance Seal 19. ABSTRCT...Center for Night Vision and x Electro-Optics I AMSEL-RD-NV-0077 ENVIRONMENTAL TEST REPORT ON THE CTI-CRYOGENICS 1-WATT INTEGRAL STIRLING COOLER (LONG...NO. NO. [ ACCESSION NO. 11. TITLE (Incdude Securty Classificadon) Environmental Test Report on the CTI-CryoD nics 1-Watt Intektal Stirling Cooler

  9. Results of Performance Tests Performed on the John Watts WW Casing Connection on 7" Pipe

    SciTech Connect

    John D. Watts

    2000-02-01

    Stress Engineering Services (SES) was contracted by Mr. John Watts to test his ''WW'' threaded connection developed for oilfield oil and gas service. This work was a continuation of testing performed by SES as reported in August of 1999. The connection design tested was identified as ''WW''. The samples were all integral (no coupled connections) and contained a wedge thread form with 90{sup o} flank angles relative to the pipe centerline. The wedge thread form is a variable width thread that primarily engages on the flanks. This thread form provides very high torque capacity and good stabbing ability and makeup. The test procedure selected for one of the samples was the newly written ISO 13679 procedure for full scale testing of casing and tubing connections, which is currently going through the ISO acceptance process. The ISO procedure requires a variety of tests that includes makeup/breakout testing, internal gas sealability/external water sealability testing with axial tension, axial compression, bending, internal gas thermal cycle tests and limit load (failure) tests. This test procedure was performed with one sample. Four samples were tested to failure. Table 1 contains a summary of the tasks performed by SES. The project started with the delivery of test samples by Mr. Watts. Pipe from the previous round of tests was used for the new samples. Figure 1 shows the structural and sealing results relative to the pipe body. Sample 1 was used to determine the torque capacity of the connection. Torque was applied to the capacity of SES's equipment which was 28,424 ft-lbs. From this, an initial recommended torque range of 7,200 to 8,800 ft-lbs. was selected. The sample was disassembled and while there was no galling observed in the threads, the end of the pin had collapsed inward. Sample 2 received three makeups. Breakouts 1 and 2 also had collapsing of the pin end, with no thread galling. From these make/breaks, it was decided to reduce the amount of lubricant

  10. 47 CFR 22.593 - Effective radiated power limits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Effective radiated power limits. 22.593 Section... power limits. The effective radiated power of fixed stations operating on the channels listed in § 22.591 must not exceed 150 Watts. The equivalent isotropically radiated power of existing fixed...

  11. 47 CFR 80.63 - Maintenance of transmitter power.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Maintenance of transmitter power. 80.63 Section...-General § 80.63 Maintenance of transmitter power. (a) The power of each radio transmitter must not be more... manufacturer for carrier power in excess of 100 watts must contain the instruments necessary to determine...

  12. Lumen Maintenance Testing of the Philips 60-Watt Replacement Lamp L Prize Entry

    SciTech Connect

    Gordon, Kelly L.; Hafen, Ryan P.; Hathaway, John E.; McCullough, Jeffrey J.

    2012-09-01

    This paper describes testing conducted to evaluate the Philips' L Prize award winning 60-watt LED replacement product's ability to meet the lifetime/lumen maintenance requirement of the competition, which was: "having 70 percent of the lumen value under subparagraph (A) [producing a luminous flux greater than 900 lumens] exceeding 25,000 hours under typical conditions expected in residential use." A custom test apparatus was designed and constructed for this testing and a statistical approach was developed for use in evaluating the test results. This will be the only publicly available, third-party data set of long-term LED product operation.

  13. 3-D model of a radial flow sub-watt methanol fuel processor

    SciTech Connect

    Holladay, J. D.; Wang, Y.

    2015-10-01

    A 3-D model is presented for a novel sub-watt packed bed reactor. The reactor uses an annular inlet flow combined with a radial flow packed bed reactor. The baseline reactor is compared to a reactor with multiple outlets and a reactor with 3 internal fins. Increasing the outlets from 1 to 4 did improve the flow distribution, but did not increase the performance in the simulation. However, inserting fins allowed a decrease in temperature with same inlet flow of approximately 35K. Or the inlet flow rate could be increased by a factor of 2.8x while maintaining >99% conversion.

  14. Lead test assembly irradiation and analysis Watts Bar Nuclear Plant, Tennessee and Hanford Site, Richland, Washington

    SciTech Connect

    1997-07-01

    The U.S. Department of Energy (DOE) needs to confirm the viability of using a commercial light water reactor (CLWR) as a potential source for maintaining the nation`s supply of tritium. The Proposed Action discussed in this environmental assessment is a limited scale confirmatory test that would provide DOE with information needed to assess that option. This document contains the environmental assessment results for the Lead test assembly irradiation and analysis for the Watts Bar Nuclear Plant, Tennessee, and the Hanford Site in Richland, Washington.

  15. An initial measurement of Planck's constant using the NPL Mark II watt balance

    NASA Astrophysics Data System (ADS)

    Robinson, I. A.; Kibble, B. P.

    2007-12-01

    During 2006 modifications were made to the NPL Mark II moving-coil watt balance which eliminated several significant sources of error. The apparatus was run from October 2006 to March 2007 to check its operation and to produce a preliminary value of Planck's constant h. This paper reports the current state of the work and predicts the uncertainty that is expected to be achievable with the existing apparatus. The preliminary value of h is 6.626 070 95(44) × 10-34 J s, which corresponds to a value of the Avogadro constant of NA = 6.022 139 99(40) × 1023 mol-1.

  16. First determination of the Planck constant using the LNE watt balance

    NASA Astrophysics Data System (ADS)

    Thomas, M.; Espel, P.; Ziane, D.; Pinot, P.; Juncar, P.; Pereira Dos Santos, F.; Merlet, S.; Piquemal, F.; Genevès, G.

    2015-04-01

    After separate developments of the different elements with continuous characterizations and improvements, the LNE watt balance has been assembled. This paper describes the system in detail and gives its first measurements of the Planck’s constant h. The value determined in air is h = 6.626 068 8(20) × 10-34 Js which differs in relative terms by -0.05  ×  10-7 from the h90 value and by -1.1  ×  10-7 from that of the 2010 CODATA adjustment of h. The relative standard uncertainty associated is 3.1  ×  10-7.

  17. Very High Power THz Radiation Sources.

    PubMed

    Carr, G L; Martin, M C; McKinney, W R; Jordan, K; Neil, G R; Williams, G P

    2003-06-01

    We report the production of high power (20watts average, ∼ 1 Megawatt peak) broadbandTHz light based on coherent emission fromrelativistic electrons. Such sources areideal for imaging, for high power damagestudies and for studies of non-linearphenomena in this spectral range. Wedescribe the source, presenting theoreticalcalculations and their experimentalverification. For clarity we compare thissource with one based on ultrafast lasertechniques.

  18. A five-watt G-M/J-T refrigerator for LHe target at BNL

    NASA Astrophysics Data System (ADS)

    Jia, L. X.; Wang, L.; Addessi, L.; Miglionico, G.; Martin, D.; Leskowicz, J.; McNeill, M.; Yatauro, B.; Tallerico, T.

    2002-05-01

    A five-watts G-M/J-T refrigerator was built and installed for the high-energy physics research at Brookhaven National Laboratory in 2001. A liquid helium target of 8.25 liters was required for an experiment in the proton beam line at the Alternating Gradient Synchrotron (AGS) of BNL. The large radiation heat load towards the target requires a five-watts refrigerator at 4.2 K to support a liquid helium flask of 0.2 meter in diameter and 0.3 meter in length, which is made of Mylar film of 0.35 mm in thickness. The liquid helium flask is thermally exposed to the vacuum windows that are also made of 0.35 mm thickness Mylar film at room temperature. The refrigerator uses a two-stage Gifford-McMahon cryocooler for precooling the Joule-Thomson circuit that consists of five Linde-type heat exchangers. A mass flow rate of 0.8˜1.0 grams per second at 17.7 atm is applied to the refrigerator cold box. The two-phase helium flows between the liquid target and liquid/gas separator by means of a thermosyphon. This paper presents the system design as well as the test results including the control of the thermal oscillation.

  19. Effects of choline chloride on electrodeposited Ni coating from a Watts-type bath

    NASA Astrophysics Data System (ADS)

    Wang, Yurong; Yang, Caihong; He, Jiawei; Wang, Wenchang; Mitsuzak, Naotoshi; Chen, Zhidong

    2016-05-01

    Electrodeposition of bright nickel (Ni) was carried out in a Watts-type bath. Choline chloride (ChCl) was applied as a multifunctional additive and substitute for nickel chloride (NiCl2) in a Watts-type bath. The function of ChCl was investigated through conductivity tests, anodic polarization, and cathodic polarization experiments. The studies revealed that ChCl performed well as a conducting salt, anodic activator, and cathodic inhibitor. The effects of ChCl on deposition rate, preferred orientation, grain size, surface morphology, and microhardness of Ni coatings were also studied. The deposition rate reached a maximum value of greater than 27 μm h-1 when 20 g L-1 ChCl was introduced to the bath. Using X-ray diffraction, it was confirmed that progressive addition of ChCl promoted the preferred crystal orientation modification from (2 0 0) and (2 2 0) to (1 1 1), refined grain size, and enhanced microhardness. The presence of ChCl lowered the roughness of the coating.

  20. Remedial investigation/feasibility study report for Lower Watts Bar Reservoir Operable Unit

    SciTech Connect

    1995-03-01

    This document is the combined Remedial Investigation and Feasibility Study Report for the lower Watts Bar Reservoir (LWBR) Operable Unit (OU). The LWBR is located in Roane, Rhea, and Meigs counties, Tennessee, and consists of Watts Bar Reservoir downstream of the Clinch river. This area has received hazardous substances released over a period of 50 years from the US Department of Energy`s Oak Ridge Reservation (ORR), a National Priority List site established under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). As required by this law, the ORR and all off-site areas that have received contaminants, including LWBR, must be investigated to determine the risk to human health and the environment resulting from these releases, the need for any remedial action to reduce these risks, and the remedial actions that are most feasible for implementation in this OU. Contaminants from the ORR are primarily transported to the LWBR via the Clinch River. There is little data regarding the quantities of most contaminants potentially released from the ORR to the Clinch River, particularly for the early years of ORR operations. Estimates of the quantities released during this period are available for most radionuclides and some inorganic contaminants, indicating that releases 30 to 50 years ago were much higher than today. Since the early 1970s, the release of potential contaminants has been monitored for compliance with environmental law and reported in the annual environmental monitoring reports for the ORR.

  1. Reconciling Planck constant determinations via watt balance and enriched-silicon measurements at NRC Canada

    NASA Astrophysics Data System (ADS)

    Steele, A. G.; Meija, J.; Sanchez, C. A.; Yang, L.; Wood, B. M.; Sturgeon, R. E.; Mester, Z.; Inglis, A. D.

    2012-02-01

    The next revision to the International System of Units will emphasize the relationship between the base units (kilogram, metre, second, ampere, kelvin, candela and mole) and fundamental constants of nature (the speed of light, c, the Planck constant, h, the elementary charge, e, the Boltzmann constant, kB, the Avogadro constant, NA, etc). The redefinition cannot proceed without consistency between two complementary metrological approaches to measuring h: a 'physics' approach, using watt balances and the equivalence principle between electrical and mechanical force, and a 'chemistry' approach that can be viewed as determining the mass of a single atom of silicon. We report the first high precision physics and chemistry results that agree within 12 parts per billion: h (watt balance) = 6.626 070 63(43) × 10-34 J s and h(silicon) = 6.626 070 55(21) × 10-34 J s. When combined with values determined by other metrology laboratories, this work helps to constrain our knowledge of h to 20 parts per billion, moving us closer to a redefinition of the metric system used around the world.

  2. Spectrophotovoltaic orbital power generation

    NASA Technical Reports Server (NTRS)

    Onffroy, J. R.

    1980-01-01

    The feasibilty of a spectrophotovoltaic orbital power generation system that optically concentrates solar energy is demonstrated. A dichroic beam-splitting mirror is used to divide the solar spectrum into two wavebands. Absorption of these wavebands by GaAs and Si solar cell arrays with matched energy bandgaps increases the cell efficiency while decreasing the amount of heat that must be rejected. The projected cost per peak watt if this system is $2.50/W sub p.

  3. '…to whom it will be extremly Usefull.' Dr William Cullen's adoption of James Watt's copying machine.

    PubMed

    Wheelock, H

    2016-06-01

    Dr William Cullen (1710-1790) was a leading physician of the Enlightenment era. As professor in Edinburgh he became the most influential teacher of theoretical and practical medicine in 18th century Britain. A renowned private practitioner, Cullen systematically archived his postal 'consultations', now held by the Royal College of Physicians of Edinburgh. Initially Cullen preserved his replies as transcriptions, but from April 1781 he began using a mechanical copier, newly devised by the Scottish engineer James Watt. This paper describes the development, promotion and functioning of Watt's copier and considers Cullen's own adoption of the machine. It is suggested that with Cullen's adoption of Watt's copier, medical record keeping entered a new historical phase comparable with the recent digital revolution.

  4. TVA sediment-disturbing activities within the Watts Bar Reservoir and Melton Hill Reservoir areas of the Clinch River

    SciTech Connect

    1993-12-31

    The objectives of Task 5 were to review: (1) the extent of dredging, construction, and other sediment-disturbing activities conducted by the Tennessee Valley Authority (TVA) in potentially contaminated areas of Watts Bar Reservoir; and (2) the disposition of the materials from these activities. This memorandum is the final report for Task 5. This memorandum describes major activities in the Watts Bar Reservoir and Melton Hill Reservoir areas of the Clinch River that possibly resulted in significant disturbance of potentially contaminated sediments. TVA records from the construction of Watts Bar Dam, Kingston Fossil Plant, and Melton Hill Dam were reviewed to facilitate qualitative description of the effect of these activities in disturbing potentially contaminated sediments. The critical period for these activities in disturbing contaminated sediments was during or after 1956 when the peak releases of radioactive contaminants occurred from the Oak Ridge Reservation.

  5. 47 CFR 87.131 - Power and emissions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Power and emissions. 87.131 Section 87.131... Technical Requirements § 87.131 Power and emissions. The following table lists authorized emissions and... Authorized emission(s) 9 Maximum power 1 Aeronautical advisory VHF A3E 10 watts. 10 Aeronautical multicom...

  6. Low power, CMOS digital autocorrelator spectrometer for spaceborne applications

    NASA Technical Reports Server (NTRS)

    Chandra, Kumar; Wilson, William J.

    1992-01-01

    A 128-channel digital autocorrelator spectrometer using four 32 channel low power CMOS correlator chips was built and tested. The CMOS correlator chip uses a 2-bit multiplication algorithm and a full-custom CMOS VLSI design to achieve low DC power consumption. The digital autocorrelator spectrometer has a 20 MHz band width, and the total DC power requirement is 6 Watts.

  7. A Concept for a Radioisotope Powered Lunar CubeSat

    NASA Astrophysics Data System (ADS)

    Cataldo, R. L.

    2016-11-01

    Presented is a concept for a small lander or cubesat lunar mission that would benefit from a low-power milli-watt radioisotope power source (RPS). A RPS would provide long-lived electrical and thermal power enabling a long-lived lunar mission.

  8. First Passage Percolation on the Newman-Watts Small World Model

    NASA Astrophysics Data System (ADS)

    Komjáthy, Júlia; Vadon, Viktória

    2016-02-01

    The Newman-Watts model is given by taking a cycle graph of n vertices and then adding each possible edge (i,j), |i-j|≠ 1 mod n with probability ρ /n for some ρ >0 constant. In this paper we add i.i.d. exponential edge weights to this graph, and investigate typical distances in the corresponding random metric space given by the least weight paths between vertices. We show that typical distances grow as 1/λ log n for a λ >0 and determine the distribution of smaller order terms in terms of limits of branching process random variables. We prove that the number of edges along the shortest weight path follows a Central Limit Theorem, and show that in a corresponding epidemic spread model the fraction of infected vertices follows a deterministic curve with a random shift.

  9. Details of the 1998 Watt Balance Experiment Determining the Planck Constant

    PubMed Central

    Steiner, Richard; Newell, David; Williams, Edwin

    2005-01-01

    The National Institute of Standards and Technology (NIST) watt balance experiment completed a determination of Planck constant in 1998 with a relative standard uncertainty of 87 × 10−9 (k = 1), concurrently with an upper limit on the drift rate of the SI kilogram mass standard. A number of other fundamental physical constants with uncertainties dominated by this result are also calculated. This paper focuses on the details of the balance apparatus, the measurement and control procedures, and the reference calibrations. The alignment procedures are also described, as is a novel mutual inductance measurement procedure. The analysis summary discusses the data noise sources and estimates for the Type B uncertainty contributions to the uncertainty budget. Much of this detail, some historical progression, and a few recent findings have not been included in previous papers reporting the results of this experiment. PMID:27308100

  10. Spatial prisoner's dilemma game with volunteering in Newman-Watts small-world networks

    NASA Astrophysics Data System (ADS)

    Wu, Zhi-Xi; Xu, Xin-Jian; Chen, Yong; Wang, Ying-Hai

    2005-03-01

    A modified spatial prisoner’s dilemma game with voluntary participation in Newman-Watts small-world networks is studied. Some reasonable ingredients are introduced to the game evolutionary dynamics: each agent in the network is a pure strategist and can only take one of three strategies (cooperator, defector, and loner); its strategical transformation is associated with both the number of strategical states and the magnitude of average profits, which are adopted and acquired by its coplayers in the previous round of play; a stochastic strategy mutation is applied when it gets into the trouble of local commons that the agent and its neighbors are in the same state and get the same average payoffs. In the case of very low temptation to defect, it is found that agents are willing to participate in the game in typical small-world region and intensive collective oscillations arise in more random region.

  11. Evolutionary prisoner's dilemma on Newman-Watts social networks with an asymmetric payoff distribution mechanism

    NASA Astrophysics Data System (ADS)

    Du, Wen-Bo; Cao, Xian-Bin; Yang, Han-Xin; Hu, Mao-Bin

    2010-01-01

    In this paper, we introduce an asymmetric payoff distribution mechanism into the evolutionary prisoner's dilemma game (PDG) on Newman-Watts social networks, and study its effects on the evolution of cooperation. The asymmetric payoff distribution mechanism can be adjusted by the parameter α: if α > 0, the rich will exploit the poor to get richer; if α < 0, the rich are forced to offer part of their income to the poor. Numerical results show that the cooperator frequency monotonously increases with α and is remarkably promoted when α > 0. The effects of updating order and self-interaction are also investigated. The co-action of random updating and self-interaction can induce the highest cooperation level. Moreover, we employ the Gini coefficient to investigate the effect of asymmetric payoff distribution on the the system's wealth distribution. This work may be helpful for understanding cooperative behaviour and wealth inequality in society.

  12. Watt-level millimeter-wave monolithic diode-grid frequency multipliers

    NASA Technical Reports Server (NTRS)

    Hwu, J. R.; Jou, C. F.; Luhmann, N. C., Jr.; Lam, W. W.; Rutledge, D. B.; Hancock, B.; Lieneweg, U.; Maserjian, J.

    1988-01-01

    Wall-level CW solid-state sources in the millimeter-wave region are needed for plasma diagnostics. Monolithic metal-grid arrays containing in excess of 1000 Schottky diodes have produced watt-level output at 66 GHz in a doubler configuration, in excellent agreement with the large-signal predictions of the frequency multiplication. Current efforts are concentrated on fabricating and developing arrays of a novel barrier-intrinsic-N+ (BIN) diode which promise increased performance in a tripler configuration. Initial tests will be made for a configuration where a tripling efficiency of 35 percent at an output frequency of 100 GHz is predicted. Eventual goals are monolithic BIN diode grids operating at 1 THz.

  13. A tunnel wick 100,000 watt-inch heat pipe.

    NASA Technical Reports Server (NTRS)

    Kosson, R.; Hembach, R.; Edelstein, F.; Tawil, M.

    1972-01-01

    The tunnel wick is a new type of heat pipe artery which can prime in a gravity environment by temperature-induced pressure differences between interior and exterior. The paper discusses the concept and its application in the design of room-temperature high-transport-capacity heat pipes. The analytical model of the system is summarized; and performance data obtained with the aid of a related computer program is included. Test data verifying the concept is presented for several pipes, including an eight-foot-long, 0.9-inch ID heat pipe, using ammonia working fluid, with a transport capacity in excess of 150,000 watt-inches. A brief discussion of potential applications for this type of heat pipe includes a variable conductance device to serve as a radiator header and a high capacity heat transport system.

  14. Cascading failures with local load redistribution in interdependent Watts-Strogatz networks

    NASA Astrophysics Data System (ADS)

    Hong, Chen; Zhang, Jun; Du, Wen-Bo; Sallan, Jose Maria; Lordan, Oriol

    2016-05-01

    Cascading failures of loads in isolated networks have been studied extensively over the last decade. Since 2010, such research has extended to interdependent networks. In this paper, we study cascading failures with local load redistribution in interdependent Watts-Strogatz (WS) networks. The effects of rewiring probability and coupling strength on the resilience of interdependent WS networks have been extensively investigated. It has been found that, for small values of the tolerance parameter, interdependent networks are more vulnerable as rewiring probability increases. For larger values of the tolerance parameter, the robustness of interdependent networks firstly decreases and then increases as rewiring probability increases. Coupling strength has a different impact on robustness. For low values of coupling strength, the resilience of interdependent networks decreases with the increment of the coupling strength until it reaches a certain threshold value. For values of coupling strength above this threshold, the opposite effect is observed. Our results are helpful to understand and design resilient interdependent networks.

  15. Development of a 75-watt 60-GHz traveling-wave tube for intersatellite communications

    NASA Technical Reports Server (NTRS)

    Rousseau, A. L.; Tammaru, I.; Vaszari, J. P.

    1988-01-01

    This program covers the initial design and development of a 75 watt, 60 GHz traveling-wave tube for intersatellite communications. The objective frequency band was 59 to 64 GHz, with a minimum tube gain of 35 dB. The objective overall efficiency at saturation was 40 percent. The tube, designated the 961H, used a coupled-cavity interaction circuit with periodic permanent magnet beam focusing to minimize the weight. For efficiency enhancement, it incorporated a four-stage depressed collector capable of radiation cooling in space. The electron gun had a low-temperature (type-M) cathode and an isolated anode. Two tubes were built and tested; one feasibility model with a single-stage collector and one experimental model that incorporated the multistage collector.

  16. Autaptic activity-induced synchronization transitions in Newman-Watts network of Hodgkin-Huxley neurons.

    PubMed

    Wu, Yanan; Gong, Yubing; Wang, Qi

    2015-04-01

    In this paper, we numerically study the effect of autapse on the synchronization of Newman-Watts small-world Hodgkin-Huxley neuron network. It is found that the neurons exhibit synchronization transitions as autaptic self-feedback delay is varied, and the phenomenon becomes strongest when autaptic self-feedback strength is optimal. This phenomenon also changes with the change of coupling strength and network randomness and become strongest when they are optimal. There are similar synchronization transitions for electrical and chemical autapse, but the synchronization transitions for chemical autapse occur more frequently and are stronger than those for electrical synapse. The underlying mechanisms are briefly discussed in quality. These results show that autaptic activity plays a subtle role in the synchronization of the neuronal network. These findings may find potential implications of autapse for the information processing and transmission in neural systems.

  17. Watts linkage based large band low frequency sensors for scientific applications

    NASA Astrophysics Data System (ADS)

    Barone, F.; Giordano, G.; Acernese, F.; Romano, R.

    2016-07-01

    The UNISA Folded Pendulum class of horizontal and vertical sensors, based on an innovative configuration of the classical Watt's linkage mechanical architecture, allows the design and implementation of very large band monolithic sensors (10-7 Hz to102 Hz), whose sensitivities for the most common applications are defined by the noise introduced by their readouts (e.g. <10-12 m /√{ Hz } with classical LVDT readouts). These unique features, coupled other relevant properties like scalability, compactness, lightness, high directivity, frequency tunability (typical resonance frequencies in the band 10-1 Hz to102 Hz), very high immunity to environmental noises and low cost make this class of sensors very effective for the implementation of uniaxial (horizontal and/or vertical) and triaxial seismometers and accelerometers for ground, space and underwater applications, including UHV and cryogenics ones.

  18. An Economic Analysis of September 11th

    ERIC Educational Resources Information Center

    Langelett, George L.; Schug, Mark C.

    2004-01-01

    To many Western observers, the behavior of people in the Middle East is a mystery. The area is the scene of brutality and seemingly senseless acts of violence. Why has there been so much turmoil there for so long? This article contains a brief review of past events in the Middle East, which helps to establish the context of the problem. Sections…

  19. 11th International Conference of Radiation Research

    SciTech Connect

    1999-07-18

    Topics discussed in the conference included the following: Radiation Physics, Radiation Chemistry and modelling--Radiation physics and dosimetry; Electron transfer in biological media; Radiation chemistry; Biophysical and biochemical modelling; Mechanisms of DNA damage; Assays of DNA damage; Energy deposition in micro volumes; Photo-effects; Special techniques and technologies; Oxidative damage. Molecular and cellular effects-- Photobiology; Cell cycle effects; DNA damage: Strand breaks; DNA damage: Bases; DNA damage Non-targeted; DNA damage: other; Chromosome aberrations: clonal; Chromosomal aberrations: non-clonal; Interactions: Heat/Radiation/Drugs; Biochemical effects; Protein expression; Gene induction; Co-operative effects; ``Bystander'' effects; Oxidative stress effects; Recovery from radiation damage. DNA damage and repair -- DNA repair genes; DNA repair deficient diseases; DNA repair enzymology; Epigenetic effects on repair; and Ataxia and ATM.

  20. Part C Updates. 11th Edition

    ERIC Educational Resources Information Center

    Danaher, Joan; Goode, Sue; Lazara, Alex

    2010-01-01

    "Part C Updates" is a compilation of information on various aspects of the Early Intervention Program for Infants and Toddlers with Disabilities (Part C) of the Individuals with Disabilities Education Act (IDEA). This is the eleventh volume in a series of compilations, which included two editions of Part H Updates, the former name of the…

  1. The 11th Aerospace Mechanisms Symposium

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Various mechanisms in aerospace engineering were presented at this conference. Specifications, design, and use of spacecraft and missile components are discussed, such as tail assemblies, radiometers, magnetormeters, pins, reaction wheels, ball bearings, actuators, mirrors, nutation dampers, airfoils, solar arrays, etc.

  2. The 11th Aerospace Mechanisms Symposium

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Mechanical devices and drives developed for aerospace applications are described. Satellite flywheels, magnetic bearings, a missile umbilical system, a cartridge firing device, and an oiler for satellite bearing lubrication are among the topics discussed.

  3. The 11th Space Simulation Conference

    NASA Technical Reports Server (NTRS)

    Bond, A. C. (Editor)

    1980-01-01

    Subject areas range from specialized issues dealing with the space and entry environments to the environmental testing of systems and complete spacecraft of present-day vintage. Various papers consider: the test and development of several key systems of the orbiter vehicle; integrated tests of complete satellites; new and unique test facilities developed to meet the demanding requirements of high fidelity simulation of test environments; and contamination species, including the instrumentation for detection and measurement of such. Special topics include improved thermal protection methodologies and approaches, sophisticated sensor developments, and other related testing and development areas.

  4. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT - PHYSICAL REMOVAL OF MICROBIAL CONTAMINATION AGENTS IN DRINKING WATER, WATTS P{REMIER ULTRA 5 REVERSE OSMOSIS DRINKING WATER TREATMENT SYSTEM (POU)

    EPA Science Inventory

    The Watts Premier Ultra 5 system was tested for removal of bacteria and viruses at NSF International's Laboratory. Watts Premier submitted ten units, which were split into two groups of five. One group received 25 days of conditioning prior to challenge testing, while the secon...

  5. 77 FR 41811 - In the Matter of Tennessee Valley Authority Watts Bar Nuclear Plant EA-12-021; Confirmatory Order...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-16

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION In the Matter of Tennessee Valley Authority Watts Bar Nuclear Plant EA-12-021; Confirmatory Order... for all matters discussed in the NRC's letter to TVA of March 23, 2012 (EA-12- 021). 8. This...

  6. 75 FR 80731 - Request for Exclusion of 120 Volt, 100 Watt R20 Short Incandescent Reflector Lamps

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-23

    ..., which is marketed for use in hot tub spas. Public comment is requested on whether DOE should grant the... watt R20 short, which is marketed exclusively for use in hot tub spas sold into specific jurisdictions... capacity for use in certain types of hot tub spas that require smaller dimensions--would lead to...

  7. ETV REPORT: REMOVAL OF CHEMICAL CONTAMINANTS IN DRINKING WATER – WATTS PREMIER INC. WP-4V DRINKING WATER TREATMENT SYSTEM

    EPA Science Inventory

    The Watts Premier WP-4V POU drinking water treatment system was tested for removal of aldicarb, benzene, cadmium, carbofuran, cesium, chloroform, dichlorvos, dicrotophos, fenamiphos, mercury, mevinphos, oxamyl, strontium, and strychnine. The WP-4V employs a reverse osmosis (RO) m...

  8. PHYSICAL REMOVAL OF MICROBIAL CONTAMINANTS IN DRINKING WATER – WATTS PREMIER INC. WP-4V DRINKING WATER TREATMENT SYSTEM

    EPA Science Inventory

    The Watts Premier WP-4V four-stage POU RO system was tested for removal of bacteria and viruses at NSF’s Drinking Water Treatment Systems Laboratory. Five systems were challenged with the bacteriophage viruses fr and MS2, and the bacteria Brevundimonas diminutaEM. The ...

  9. 75 FR 66797 - Watts Regulator, Including On-Site Leased Workers From Employment Control, D/B/A Employment...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-29

    ... Employment and Training Administration Watts Regulator, Including On-Site Leased Workers From Employment Control, D/B/A Employment Staffing, Inc., Spindale, NC; Amended Certification Regarding Eligibility To... amended (``Act''), 19 U.S.C. 2273, the Department of Labor issued a Certification of Eligibility to...

  10. Thermal control of power supplies with electronic packaging techniques

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The analysis, design, and development work to reduce the weight and size of a standard modular power supply with a 350 watt output was summarized. By integrating low cost commercial heat pipes in the redesign of this power supply, weight was reduced by 30% from that of the previous design. The temperature was also appreciably reduced, increasing the environmental capability of the unit. A demonstration unit with a 100 watt output and a 15 volt regulator module, plus simulated output modules, was built and tested to evaluate the thermal performance of the redesigned power supply.

  11. Design of polarizers for a mega-watt long-pulse millimeter-wave transmission line on the large helical device

    SciTech Connect

    Ii, T. Kubo, S.; Shimozuma, T.; Kobayashi, S.; Okada, K.; Yoshimura, Y.; Igami, H.; Takahashi, H.; Ito, S.; Mizuno, Y.; Okada, K.; Mutoh, T.; Makino, R.; Kobayashi, K.; Goto, Y.

    2015-02-15

    The polarizer is one of the critical components in a high-power millimeter-wave transmission line. It requires full and highly efficient coverage of any polarization states, high-power tolerance, and low-loss feature. Polarizers with rounded shape at the edge of the periodic groove surface are designed and fabricated by the machining process for a mega-watt long-pulse millimeter-wave transmission line of the electron cyclotron resonance heating system in the large helical device. The groove shape of λ/8- and λ/4-type polarizers for an 82.7 GHz transmission line is optimally designed in an integral method developed in the vector theories of diffraction gratings so that the efficiency to realize any polarization state can be maximized. The dependence of the polarization states on the combination of the two polarizer rotation angles (Φ{sub λ/8}, Φ{sub λ/4}) is examined experimentally in a low-power test with the newly developed polarization monitor. The results show that the measured polarization characteristics are in good agreement with the calculated ones.

  12. Tissue temperatures attained in indocyanine-green infiltrated and noninfiltrated bovine eyelids using diode laser (805-nm) energy at 3, 5, and 7 watts

    NASA Astrophysics Data System (ADS)

    Kirkpatrick, John G.; Bartels, Kenneth E.; Dickey, D. Thomas; Powell, Ronald; Schafer, Steven A.; Zhou, Jin Fu; Wicksted, James P.

    1998-07-01

    Normal non-pigmented bovine eyelids in two Hereford cows under general anesthesia were treated with diode laser (805 nm) in a power range of 3 - 6.5 watts. Tissue temperatures were measured in areas infiltrated with 0.25% indocyanine green (ICG) solution and in non-infiltrated areas. Targeted tissue was laser treated at post-injection time intervals of 1 to 60 minutes. Temperatures were measured with a computerized temperature sensing program using hypodermic needle thermistors. Trial objectives were to establish power/chromophore concentration/time parameters to create tumor and peri-tumor tissue temperatures of 50 degrees Celsius without causing epidermal vaporization. Tissue temperature of 50 degrees Celsius has been established as the temperature producing coagulative necrosis of squamous cell carcinoma tumor tissue in 30 seconds. This temperature was produced in chromophore-enhanced tissue bit without repeatable confidence. Bovine ocular squamous cell carcinoma (BOSCC)-affected eyes and eyelids have been successfully treated with carbon dioxide focused and defocused laser with and without chromophore enhanced diode laser (805 nm) energy. The need for tumor staging and procedure standardization requires further investigation to determine laser power/chromophore concentration, and issue exposure times.

  13. Design of polarizers for a mega-watt long-pulse millimeter-wave transmission line on the large helical device.

    PubMed

    Ii, T; Kubo, S; Shimozuma, T; Kobayashi, S; Okada, K; Yoshimura, Y; Igami, H; Takahashi, H; Ito, S; Mizuno, Y; Okada, K; Makino, R; Kobayashi, K; Goto, Y; Mutoh, T

    2015-02-01

    The polarizer is one of the critical components in a high-power millimeter-wave transmission line. It requires full and highly efficient coverage of any polarization states, high-power tolerance, and low-loss feature. Polarizers with rounded shape at the edge of the periodic groove surface are designed and fabricated by the machining process for a mega-watt long-pulse millimeter-wave transmission line of the electron cyclotron resonance heating system in the large helical device. The groove shape of λ/8- and λ/4-type polarizers for an 82.7 GHz transmission line is optimally designed in an integral method developed in the vector theories of diffraction gratings so that the efficiency to realize any polarization state can be maximized. The dependence of the polarization states on the combination of the two polarizer rotation angles (Φλ/8, Φλ/4) is examined experimentally in a low-power test with the newly developed polarization monitor. The results show that the measured polarization characteristics are in good agreement with the calculated ones.

  14. Power oscillator

    DOEpatents

    Gitsevich, Aleksandr

    2001-01-01

    An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and wherein the impedance transformation network is configured to protect the input of the amplifier from a destructive feedback signal. One example of the oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.

  15. Acoustics of early music spaces from the 11th to 18th century: Rediscovery of the acoustical excellence of medium-sized rooms and new perspectives for modern concert hall design

    NASA Astrophysics Data System (ADS)

    Bassuet, Alban

    2004-05-01

    The acoustical characteristics of 50 rooms that played a prominent role in the history of music between the 11th and 18th centuries were studied. The rooms include basilicas, oratorios, organ churches, and the great halls and courts of the European palaces. The research provides an understanding of the acoustical features that suit the early music repertoire, and how these rooms achieved an enhanced emotional engagement through their unique acoustical characteristics. This paper provides a summary of the acoustic measurements, which include binaural and B-format recordings in each of the rooms, and presents a unique new approach to understanding their subjective characteristics through detailed analysis and auralization of their 3-D impulse response. The study shows that the timing and direction of reflections in three dimensions is critically important to defining the subjective characteristic of a room. The results emphasize the importance of developing techniques to understand the 3-D impulse response and using auralization techniques for interpreting results and making subjective judgments. The enhanced musical experience that is achieved in these early rooms offers an invitation to rethink modern acoustics and to develop a new design approach that focuses more strongly on the subjective response and emotional engagement of the music.

  16. 47 CFR 73.811 - LPFM power and antenna height requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false LPFM power and antenna height requirements. 73... SERVICES RADIO BROADCAST SERVICES Low Power FM Broadcast Stations (LPFM) § 73.811 LPFM power and antenna... operate with maximum facilities of 100 watts effective radiated power (ERP) at 30 meters antenna...

  17. Computer Aided Design of Ka-Band Waveguide Power Combining Architectures for Interplanetary Spacecraft

    NASA Technical Reports Server (NTRS)

    Vaden, Karl R.

    2006-01-01

    Communication systems for future NASA interplanetary spacecraft require transmitter power ranging from several hundred watts to kilowatts. Several hybrid junctions are considered as elements within a corporate combining architecture for high power Ka-band space traveling-wave tube amplifiers (TWTAs). This report presents the simulated transmission characteristics of several hybrid junctions designed for a low loss, high power waveguide based power combiner.

  18. Venus Surface Power and Cooling System Design

    NASA Technical Reports Server (NTRS)

    Landis, Geoffrey A.; Mellott, Kenneth D.

    2004-01-01

    A radioisotope power and cooling system is designed to provide electrical power for the a probe operating on the surface of Venus. Most foreseeable electronics devices and sensors simply cannot operate at the 450 C ambient surface temperature of Venus. Because the mission duration is substantially long and the use of thermal mass to maintain an operable temperature range is likely impractical, some type of active refrigeration may be required to keep certain components at a temperature below ambient. The fundamental cooling requirements are comprised of the cold sink temperature, the hot sink temperature, and the amount of heat to be removed. In this instance, it is anticipated that electronics would have a nominal operating temperature of 300 C. Due to the highly thermal convective nature of the high-density atmosphere, the hot sink temperature was assumed to be 50 C, which provided a 500 C temperature of the cooler's heat rejecter to the ambient atmosphere. The majority of the heat load on the cooler is from the high temperature ambient surface environment on Venus. Assuming 5 cm radial thickness of ceramic blanket insulation, the ambient heat load was estimated at approximately 77 watts. With an estimated quantity of 10 watts of heat generation from electronics and sensors, and to accommodate some level of uncertainty, the total heat load requirement was rounded up to an even 100 watts. For the radioisotope Stirling power converter configuration designed, the Sage model predicts a thermodynamic power output capacity of 478.1 watts, which slightly exceeds the required 469.1 watts. The hot sink temperature is 1200 C, and the cold sink temperature is 500 C. The required heat input is 1740 watts. This gives a thermodynamic efficiency of 27.48 %. The maximum theoretically obtainable efficiency is 47.52 %. It is estimated that the mechanical efficiency of the power converter design is on the order of 85 %, based on experimental measurements taken from 500 watt power

  19. The Planck Constant, the International System of Units, and the 2012 North American Watt Balance Absolute Gravity Comparison

    NASA Astrophysics Data System (ADS)

    Newell, D. B.

    2012-12-01

    As outlined in Resolution 1 of the 24th Meeting of the General Conference on Weights and Measures (CGPM) on the future revision of the International System of Units (SI) [1], the current four SI base units the kilogram, the ampere, the kelvin and the mole, will be redefined in terms of invariants of nature. The new definitions will be based on fixed numerical values of the Planck constant (h), the elementary charge (e), the Boltzmann constant (k), and the Avogadro constant (NA), respectively. While significant progress has been made towards providing the necessary experimental results for the redefinition, some disagreement among the relevant data remain. Among the set of discrepant data towards the redefinition of the SI are the determinations of the Planck constant from the National Institute of Standards and Technology (NIST) watt balance [2] and the recent result from the National Research Council Canada (NRC) watt balance [3], with the discrepancy of roughly 2.5 parts in 107 being significantly outside the reported uncertainties. Of major concern is that the watt balance experiment is seen as a key component of a mise en pratique for the new kilogram definition, once such a redefinition takes place. The basic operational principle of a watt balance relates the Planck constant to mass, length, and time through h = mgvC, where m is the mass of an artifact mass standard, g is the local acceleration of gravity, v is a velocity, and C is a combination of frequencies and scalar constants. With the total uncertainty goal for the watt balance on the order of a few parts in 108, g needs to be determined at the location of the mass standard to parts in 109 such that its uncertainty is negligible in the final watt balance result. NIST and NRC have formed a collaborative effort to reconcile the relevant discrepant data and provide further progress towards preparing and testing a mise en pratique for the new kilogram definition. As an initial step, direct comparisons of

  20. Medium power voltage multipliers with a large number of stages

    NASA Technical Reports Server (NTRS)

    Harrigill, W. T.; Myers, I. T.

    1978-01-01

    Voltage multiplier techniques are extended at medium power levels to larger multiplication ratios. A series of dc-dc converters were built, with from 20 to 45 stages and with power levels up to 100 watts. Maximum output voltages were about 10,000 volts.

  1. Quantum transport with long-range steps on Watts-Strogatz networks

    NASA Astrophysics Data System (ADS)

    Wang, Yan; Xu, Xin-Jian

    2016-07-01

    We study transport dynamics of quantum systems with long-range steps on the Watts-Strogatz network (WSN) which is generated by rewiring links of the regular ring. First, we probe physical systems modeled by the discrete nonlinear schrödinger (DNLS) equation. Using the localized initial condition, we compute the time-averaged occupation probability of the initial site, which is related to the nonlinearity, the long-range steps and rewiring links. Self-trapping transitions occur at large (small) nonlinear parameters for coupling ɛ=-1 (1), as long-range interactions are intensified. The structure disorder induced by random rewiring, however, has dual effects for ɛ=-1 and inhibits the self-trapping behavior for ɛ=1. Second, we investigate continuous-time quantum walks (CTQW) on the regular ring ruled by the discrete linear schrödinger (DLS) equation. It is found that only the presence of the long-range steps does not affect the efficiency of the coherent exciton transport, while only the allowance of random rewiring enhances the partial localization. If both factors are considered simultaneously, localization is greatly strengthened, and the transport becomes worse.

  2. Annual radiological environmental monitoring report: Watts Bar Nuclear Plant, 1992. Operations Services/Technical Programs

    SciTech Connect

    Not Available

    1993-04-01

    This report describes the preoperational environmental radiological monitoring program conducted by TVA in the vicinity of the Watts Bar Nuclear Plant (WBN) in 1992. The program includes the collection of samples from the environment and the determination of the concentrations of radioactive materials in the samples. Samples are taken from stations in the general area of the plant and from areas that will not be influenced by plant operations. Material sampled includes air, water, milk, foods, vegetation, soil, fish, sediment, and direct radiation levels. During plant operations, results from stations near the plant will be compared with concentrations from control stations and with preoperational measurements to determine potential impacts to the public. Exposures calculated from environmental samples were contributed by naturally occurring radioactive materials, from materials commonly found in the environment as a result of atmospheric fallout, or from the operation of other nuclear facilities in the area. Since WBN has not operated, there has been no contribution of radioactivity from the plant to the environment.

  3. Quantification of degeneracy in Hodgkin-Huxley neurons on Newman-Watts small world network.

    PubMed

    Man, Menghua; Zhang, Ya; Ma, Guilei; Friston, Karl; Liu, Shanghe

    2016-08-07

    Degeneracy is a fundamental source of biological robustness, complexity and evolvability in many biological systems. However, degeneracy is often confused with redundancy. Furthermore, the quantification of degeneracy has not been addressed for realistic neuronal networks. The objective of this paper is to characterize degeneracy in neuronal network models via quantitative mathematic measures. Firstly, we establish Hodgkin-Huxley neuronal networks with Newman-Watts small world network architectures. Secondly, in order to calculate the degeneracy, redundancy and complexity in the ensuing networks, we use information entropy to quantify the information a neuronal response carries about the stimulus - and mutual information to measure the contribution of each subset of the neuronal network. Finally, we analyze the interdependency of degeneracy, redundancy and complexity - and how these three measures depend upon network architectures. Our results suggest that degeneracy can be applied to any neuronal network as a formal measure, and degeneracy is distinct from redundancy. Qualitatively degeneracy and complexity are more highly correlated over different network architectures, in comparison to redundancy. Quantitatively, the relationship between both degeneracy and redundancy depends on network coupling strength: both degeneracy and redundancy increase with complexity for small coupling strengths; however, as coupling strength increases, redundancy decreases with complexity (in contrast to degeneracy, which is relatively invariant). These results suggest that the degeneracy is a general topologic characteristic of neuronal networks, which could be applied quantitatively in neuroscience and connectomics.

  4. Ecological risk assessment for residual coal fly ash at Watts Bar Reservoir, Tennessee.

    PubMed

    Carriker, Neil E; Jones, Daniel S; Walls, Suzanne J; Stojak, Amber R

    2015-01-01

    The Tennessee Valley Authority conducted a Baseline Ecological Risk Assessment (BERA) for the Kingston Fossil Plant ash release site to evaluate potential effects of residual coal ash on biota in Watts Bar Reservoir, Tennessee. The BERA was in response to a release of 4.1 million m(3) of coal ash on December 22, 2008. It used multiple lines of evidence to assess risks for 17 different ecological receptors to approximately 400000 m(3) of residual ash in the Emory and Clinch rivers. Here, we provide a brief overview of the BERA results and then focus on how the results were used to help shape risk management decisions. Those decisions included selecting monitored natural recovery for remediation of the residual ash in the Emory and Clinch rivers and designing a long-term monitoring plan that includes adaptive management principles for timely adjustment to changing conditions. This study demonstrates the importance of site-specific ecological data (e.g., tissue concentrations for food items, reproductive data, and population data) in complex ecological risk assessments. It also illustrates the value of the US Environmental Protection Agency's (USEPA) data quality objectives process in building consensus and identifying multiple uses of results. The relatively limited adverse effects of this likely worst-case scenario for ash-related exposures in a lotic environment provide important context for the USEPA's new coal combustion residue disposal rules.

  5. Development of a radioisotope heat source for the two-watt radioisotope thermoelectric generator

    NASA Astrophysics Data System (ADS)

    Howell, Edwin I.; McNeil, Dennis C.; Amos, Wayne R.

    1992-01-01

    Described is a radioisotope heat source for the Two-Watt Radioisotope Thermoelectric Generator (RTG) which is being considered for possible application by the U.S. Navy and for other Department of Defense applications. The heat source thermal energy (75 Wt) is produced from the alpha decay of plutonium-238 which is in the form of high-fired plutonium dioxide. The capsule is non-vented and consists of three domed cylindrical components each closed with a corresponding sealed end cap. Surrounding the fuel is the liner component, which is fabricated from a tantalum-based alloy, T-111. Also fabricated from T-111 is the next component, the strength member, which serves to meet pressure and impact criteria. The outermost component, or clad, is the oxidation- and corrosion-resistant nickel-based alloy, Hastelloy S. This paper defines the design considerations, details the hardware fabrication and welding processes, discusses the addition of yttrium to the fuel to reduce liner embrittlement, and describes the testing that has been conducted or is planned to assure that there is fuel containment not only during the heat source operational life, but also in case of an accident environment.

  6. Suppression of spurious mode oscillation in mega-watt 77-GHz gyrotron as a high quality probe beam source for the collective Thomson scattering in LHD

    SciTech Connect

    Ogasawara, S.; Kubo, S.; Nishiura, M.; Tanaka, K.; Shimozuma, T.; Yoshimura, Y.; Igami, H.; Takahashi, H.; Ito, S.; Takita, Y.; Kobayashi, S.; Mizuno, Y.; Okada, K.; Tatematsu, Y.; Saito, T.; Minami, R.; Kariya, T.; Imai, T.

    2012-10-15

    Collective Thomson scattering (CTS) diagnostic requires a strong probing beam to diagnose a bulk and fast ion distribution function in fusion plasmas. A mega-watt gyrotron for electron cyclotron resonance heating is used as a probing beam in the large helical device. Spurious mode oscillations are often observed during the turning on/off phase of the modulation. The frequency spectra of the 77-GHz gyrotron output power have been measured, and then one of the spurious modes, which interferes with the CTS receiver system, is identified as the TE{sub 17,6} mode at the frequency of 74.7 GHz. The mode competition calculation indicates that the increase of the magnetic field strength at the gyrotron resonator can avoid such a spurious mode and excite only the main TE{sub 18,6} mode. The spurious radiation at the 74.7 GHz is experimentally demonstrated to be suppressed in the stronger magnetic field than that optimized for the high-power operation.

  7. Test Report on the Qualification Program for the One-Quarter (1/4) Watt Split Stirling Common Module Cryogenic Cooler.

    DTIC Science & Technology

    1984-01-01

    lUI~ II"- NATIONAL URFAU OF E O [pgnuc TE$1 Z 9 N (0 TEST REPORT ON THE QUALIFICATION PROGRAM for the One-Quarter (1/4) Watt Split Stirling Common...q le62.... O .. . TEST REPORT ON THE QUALIFICATION PROGRAM for the One-Quarter (1/4) Watt Split Stirling Common Module Cryogenic Cooler CONTRACT NO...1/4 Watt Split Stirling Common Module Cryogenic 41- PERFORMING ORO.REPORTNHUMMER Cooler 7. AUTMDR~e) 11 . CONTRACT 00 GRANT NUM0ER4’a) Raymond M

  8. An analysis and design of the mechanical characteristics of the knife edges used in the NPL watt balance

    NASA Astrophysics Data System (ADS)

    Choi, In-Mook; Robinson, Ian

    2014-04-01

    Of the seven base units of the international system of units, the SI, only the kilogram is still defined in terms of a material artefact. The watt balance is an experimental approach which supports a new definition of the kilogram in terms of constants of nature. Some watt balances, such as the NPL Mk II watt balance, use knives and flats for the balance pivots as they have the advantages of greater robustness over flexure pivots in this particular application. However, hysteresis in the knives can produce errors in the weighing through systematic shifts in the equilibrium point of the balance and it is desirable to investigate this effect as an aid to its elimination. This paper analyses the hysteresis mechanism using both finite element techniques and direct measurement. It was found that the cause of hysteresis is not normal stress but shear stress and that the deformation of the flat, rather than that of the knife, is an important factor. Problems that could not be analysed in a two-dimensional finite element model were investigated using a simplified stand-alone balance. The combined results from the finite element analysis and the stand-alone balance suggest that material properties and tip radius are more important than friction coefficient and tip angle. At loads where knife and flat distortion are low the straightness of the knife and the roughness of the surfaces can have a significant effect.

  9. Effects of coal fly ash on tree swallow reproduction in Watts Bar Reservoir, Tennessee.

    PubMed

    Walls, Suzanne J; Meyer, Carolyn B; Iannuzzi, Jacqueline; Schlekat, Tamar H

    2015-01-01

    Coal-fly ash was released in unprecedented amounts (4.1 × 10(6) m(3) ) into the Emory River from the Tennessee Valley Authority Kingston Fossil Plant on Watts Bar Reservoir in Tennessee. Tree swallows were exposed to ash-related constituents at the ash release via their diet of emergent aquatic insects, whose larval forms can accumulate constituents from submerged river sediments. Reproduction of tree swallow colonies was assessed over a 2-year period by evaluating whether 1) ash constituent concentrations were elevated in egg, eggshell, and nestling tissues at colonies near ash-impacted river reaches compared to reference colonies, 2) production of fledglings per nesting female was significantly lower in ash-impacted colonies versus reference colonies, and 3) ash constituent concentrations or diet concentrations were correlated with nest productivity measures (clutch size, hatching success, and nestling survival, and fledglings produced per nest). Of the 26 ash constituents evaluated, 4 (Se, Sr, Cu, and Hg) were significantly elevated in tissues potentially from the ash, and 3 (Se, Sr, and Cu) in tissues or in swallow diet items were weakly correlated to at least one nest-productivity measure or egg weight. Tree swallow hatching success was significantly reduced by 12%, but fledgling production per nest was unaffected due to larger clutch sizes in the impacted than reference colonies. Bioconcentration from the ash to insects in the diet to tree swallow eggs appears to be low. Overall, adverse impacts of the ash on tree swallow reproduction were not observed, but monitoring is continuing to further ensure Se from the residual ash does not adversely affect tree swallow reproduction over time. Integr Environ Assess Manag 2015;11:56-66. © 2014 SETAC.

  10. De Novo Transcriptome Sequencing of Oryza officinalis Wall ex Watt to Identify Disease-Resistance Genes.

    PubMed

    He, Bin; Gu, Yinghong; Tao, Xiang; Cheng, Xiaojie; Wei, Changhe; Fu, Jian; Cheng, Zaiquan; Zhang, Yizheng

    2015-12-10

    Oryza officinalis Wall ex Watt is one of the most important wild relatives of cultivated rice and exhibits high resistance to many diseases. It has been used as a source of genes for introgression into cultivated rice. However, there are limited genomic resources and little genetic information publicly reported for this species. To better understand the pathways and factors involved in disease resistance and accelerating the process of rice breeding, we carried out a de novo transcriptome sequencing of O. officinalis. In this research, 137,229 contigs were obtained ranging from 200 to 19,214 bp with an N50 of 2331 bp through de novo assembly of leaves, stems and roots in O. officinalis using an Illumina HiSeq 2000 platform. Based on sequence similarity searches against a non-redundant protein database, a total of 88,249 contigs were annotated with gene descriptions and 75,589 transcripts were further assigned to GO terms. Candidate genes for plant-pathogen interaction and plant hormones regulation pathways involved in disease-resistance were identified. Further analyses of gene expression profiles showed that the majority of genes related to disease resistance were all expressed in the three tissues. In addition, there are two kinds of rice bacterial blight-resistant genes in O. officinalis, including two Xa1 genes and three Xa26 genes. All 2 Xa1 genes showed the highest expression level in stem, whereas one of Xa26 was expressed dominantly in leaf and other 2 Xa26 genes displayed low expression level in all three tissues. This transcriptomic database provides an opportunity for identifying the genes involved in disease-resistance and will provide a basis for studying functional genomics of O. officinalis and genetic improvement of cultivated rice in the future.

  11. Standalone BISON Fuel Performance Results for Watts Bar Unit 1, Cycles 1-3

    SciTech Connect

    Clarno, Kevin T.; Pawlowski, Roger; Stimpson, Shane; Powers, Jeffrey

    2016-03-07

    The Consortium for Advanced Simulation of Light Water Reactors (CASL) is moving forward with more complex multiphysics simulations and increased focus on incorporating fuel performance analysis methods. The coupled neutronics/thermal-hydraulics capabilities within the Virtual Environment for Reactor Applications Core Simulator (VERA-CS) have become relatively stable, and major advances have been made in analysis efforts, including the simulation of twelve cycles of Watts Bar Nuclear Unit 1 (WBN1) operation. While this is a major achievement, the VERA-CS approaches for treating fuel pin heat transfer have well-known limitations that could be eliminated through better integration with the BISON fuel performance code. Several approaches are being implemented to consider fuel performance, including a more direct multiway coupling with Tiamat, as well as a more loosely coupled one-way approach with standalone BISON cases. Fuel performance typically undergoes an independent analysis using a standalone fuel performance code with manually specified input defined from an independent core simulator solution or set of assumptions. This report summarizes the improvements made since the initial milestone to execute BISON from VERA-CS output. Many of these improvements were prompted through tighter collaboration with the BISON development team at Idaho National Laboratory (INL). A brief description of WBN1 and some of the VERA-CS data used to simulate it are presented. Data from a small mesh sensitivity study are shown, which helps justify the mesh parameters used in this work. The multi-cycle results are presented, followed by the results for the first three cycles of WBN1 operation, particularly the parameters of interest to pellet-clad interaction (PCI) screening (fuel-clad gap closure, maximum centerline fuel temperature, maximum/minimum clad hoop stress, and cumulative damage index). Once the mechanics of this capability are functioning, future work will target cycles with

  12. Results of Performance Tests Performed on the John Watts Casing Connection on 7" Pipe

    SciTech Connect

    John D. Watts

    1999-08-01

    Stress Engineering Services (SES) was contracted by Mr. John Watts to test his threaded connection developed for oilfield oil and gas service. This particular test required the application of a variety of loads including axial tension and compression, internal pressure (gas), external pressure (water), bending and both low and elevated temperature. These loads were used to determine the sealing and structural limits of the connection. The connection design tested had tapered threads with 10 threads per inch. A square thread form and a round thread form were tested. The square thread form had a 2{sup o} load flank and 15{sup o} stab flank. The round thread had a 0{sup o} load flank and 20{sup o} stab flank. Most of the testing was performed on the round thread form. Both a coupled connection design and an integral connection design were tested. The coupling was a pin by pin (male) thread, with the pipe having a box (female) thread. Both designs have outside and inside diameters that are flush with the pipe body. Both designs also contain a small external shoulder. The test procedure selected for this evaluation was the newly written ISO 13679 procedure for full scale testing of casing and tubing connections. The ISO procedure requires a variety of tests that includes makeup/breakout testing, internal gas sealability/external water sealability testing with axial tension, axial compression, bending, internal gas thermal cycle tests and limit load (failure) tests. This test was performed with four coupled samples and included most of these loads. Two integral samples were also included for limit load testing ISO makeup/breakout tests are divided into three types--initial makeup, IML1, repeated makeup within the same sample, MBL, and repeated makeup using several samples called round robin, RR. IMU and MBL were performed in this project. The ISO sealing and structural procedure is divided into four primary tests and identified as Series A, B, C and Limit Load (failure

  13. Very high power THz radiation sources

    SciTech Connect

    Carr, G.L.; Martin, Michael C.; McKinney, Wayne R.; Jordan, K.; Neil, George R.; Williams, G.P.

    2002-10-31

    We report the production of high power (20 watts average, {approx} 1 Megawatt peak) broadband THz light based on coherent emission from relativistic electrons. Such sources are ideal for imaging, for high power damage studies and for studies of non-linear phenomena in this spectral range. We describe the source, presenting theoretical calculations and their experimental verification. For clarity we compare this source to one based on ultrafast laser techniques.

  14. Very High Power THz Radiation Sources

    SciTech Connect

    G.L. Carr; Michael C. Martin; Wayne R. McKinney; Kevin Jordan; George R. Neil; Gwyn P. Williams

    2002-10-01

    We report the production of high power (20 watts average, {approx}1 Megawatt peak) broadband THz light based on coherent emission from relativistic electrons. Such sources are ideal for imaging, for high power damage studies and for studies of non-linear phenomena in this spectral range. We describe the source, presenting theoretical calculations and their experimental verification. For clarity, we compare this sources with one based on ultrafast laser techniques.

  15. Ultra-compact Watt-level flat supercontinuum source pumped by noise-like pulse from an all-fiber oscillator.

    PubMed

    Chen, He; Zhou, Xuanfeng; Chen, Sheng-Ping; Jiang, Zong-Fu; Hou, Jing

    2015-12-28

    We demonstrate Watt-level flat visible supercontinuum (SC) generation in photonic crystal fibers, which is directly pumped by broadband noise-like pulses from an Yb-doped all-fiber oscillator. The novel SC generator is featured with elegant all-fiber-integrated architecture, high spectral flatness and high efficiency. Wide optical spectrum spanning from 500 nm to 2300 nm with 1.02 W optical power is obtained under the pump of 1.4 W noise-like pulse. The flatness of the spectrum in the range of 700 nm~1600 nm is less than 5 dB (including the pump residue). The exceptional simplicity, economical efficiency and the comparable performances make the noise-like pulse oscillator a competitive candidate to the widely used cascade amplified coherent pulse as the pump source of broadband SC. To the best of our knowledge, this is the first demonstration of SC generation which is directly pumped by an all-fiber noise-like pulse oscillator.

  16. Recent development on high-power tandem-pumped fiber laser

    NASA Astrophysics Data System (ADS)

    Zhou, Pu; Xiao, Hu; Leng, Jinyong; Zhang, Hanwei; Xu, Jiangmin; Wu, Jian

    2016-11-01

    High power fiber laser is attracting more and more attention due to its advantage in excellent beam quality, high electricto- optical conversion efficiency and compact system configuration. Power scaling of fiber laser is challenged by the brightness of pump source, nonlinear effect, modal instability and so on. Pumping active fiber by using high-brightness fiber laser instead of common laser diode may be the solution for the brightness limitation. In this paper, we will present the recent development of various kinds of high power fiber laser based on tandem pumping scheme. According to the absorption property of Ytterbium-doped fiber, Thulium-doped fiber and Holmium-doped fiber, we have theoretically studied the fiber lasers that operate at 1018 nm, 1178 nm and 1150 nm, respectively in detail. Consequently, according to the numerical results we have optimized the fiber laser system design, and we have achieved (1) 500 watt level 1018nm Ytterbium-doped fiber laser (2) 100 watt level 1150 nm fiber laser and 100 watt level random fiber laser (3) 30 watt 1178 nm Ytterbium-doped fiber laser, 200 watt-level random fiber laser. All of the above-mentioned are the record power for the corresponded type of fiber laser to the best of our knowledge. By using the high-brightness fiber laser operate at 1018 nm, 1178 nm and 1150 nm that we have developed, we have achieved the following high power fiber laser (1) 3.5 kW 1090 nm Ytterbium-doped fiber amplifier (2) 100 watt level Thulium-doped fiber laser and (3) 50 watt level Holmium -doped fiber laser.

  17. Multi-watts narrow-linewidth all fiber Yb-doped laser operating at 1179 nm.

    PubMed

    Kalita, Mridu P; Alam, Shaif-Ul; Codemard, Christophe; Yoo, Seongwoo; Boyland, Alexander J; Ibsen, Morten; Sahu, Jayanta K

    2010-03-15

    An all-fiber, narrow-linewidth, high power Yb-doped silica fiber laser at 1179 nm has been demonstrated. More than 12 W output power has been obtained, corresponding to a slope efficiency of 43% with respect to launched pump power, by core-pumping at 1090 nm. In order to increase the pump absorption, the Yb-doped fiber was heated up to 125 degrees C. At the maximum output power, the suppression of amplified spontaneous emission was more than 50 dB. Furthermore, theoretical work confirms that the proposed laser architecture can be easily scaled to higher power.

  18. Assessing ecological risks to the fish community from residual coal fly ash in Watts Bar Reservoir, Tennessee

    DOE PAGES

    Rigg, David K.; Wacksman, Mitch N.; Iannuzzi, Jacqueline; ...

    2014-12-18

    For this research, extensive site-specific biological and environmental data were collected to support an evaluation of risks to the fish community in Watts Bar Reservoir from residual ash from the December 2008 Tennessee Valley Authority (TVA) Kingston ash release. This paper describes the approach used and results of the risk assessment for the fish community, which consists of multiple measurement endpoints (measures of exposure and effects) for fish. The lines of evidence included 1) comparing postspill annual fish community assessments with nearby prespill data and data from other TVA reservoirs, 2) evaluating possible effects of exposures of fish eggs andmore » larval fish to ash in controlled laboratory toxicity tests, 3) evaluating reproductive competence of field-exposed fish, 4) assessing individual fish health through physical examination, histopathology, and blood chemistry, 5) comparing fish tissue concentrations with literature-based critical body residues, and 6) comparing concentrations of ash-related contaminants in surface waters with US Environmental Protection Agency's (USEPA) Ambient Water Quality Standards for Fish and Aquatic Life. These measurement endpoints were treated as independent lines of evidence that were integrated into an overall weight-of-evidence estimate of risk to the fish community. Collectively, the data and analysis presented here indicate that ash and ash-related constituents pose negligible risks to the fish communities in Watts Bar Reservoir. This conclusion contradicts the predictions by some researchers immediately following the ash release of devastating effects on the aquatic ecology of Watts Bar Reservoir. The information presented in this article reaffirms the wisdom of carefully evaluating the evidence before predicting probable ecological effects of a major event such as the TVA Kingston ash release. Lastly, this study demonstrates that a thorough and detailed investigation using multiple measurement endpoints

  19. Assessing ecological risks to the fish community from residual coal fly ash in Watts Bar Reservoir, Tennessee.

    PubMed

    Rigg, David K; Wacksman, Mitch N; Iannuzzi, Jacqueline; Baker, Tyler F; Adams, Marshall; Greeley, Mark S

    2015-01-01

    Extensive site-specific biological and environmental data were collected to support an evaluation of risks to the fish community in Watts Bar Reservoir from residual ash from the December 2008 Tennessee Valley Authority (TVA) Kingston ash release. This article describes the approach used and results of the risk assessment for the fish community, which consists of multiple measurement endpoints (measures of exposure and effects) for fish. The lines of evidence included 1) comparing postspill annual fish community assessments with nearby prespill data and data from other TVA reservoirs, 2) evaluating possible effects of exposures of fish eggs and larval fish to ash in controlled laboratory toxicity tests, 3) evaluating reproductive competence of field-exposed fish, 4) assessing individual fish health through physical examination, histopathology, and blood chemistry, 5) comparing fish tissue concentrations with literature-based critical body residues, and 6) comparing concentrations of ash-related contaminants in surface waters with US Environmental Protection Agency's (USEPA) Ambient Water Quality Standards for Fish and Aquatic Life. These measurement endpoints were treated as independent lines of evidence that were integrated into an overall weight-of-evidence estimate of risk to the fish community. Collectively, the data and analysis presented here indicate that ash and ash-related constituents pose negligible risks to the fish communities in Watts Bar Reservoir. This conclusion contradicts the predictions by some researchers immediately following the ash release of devastating effects on the aquatic ecology of Watts Bar Reservoir. The information presented in this article reaffirms the wisdom of carefully evaluating the evidence before predicting probable ecological effects of a major event such as the TVA Kingston ash release. This study demonstrates that a thorough and detailed investigation using multiple measurement endpoints is needed to properly evaluate

  20. Assessing ecological risks to the fish community from residual coal fly ash in Watts Bar Reservoir, Tennessee

    SciTech Connect

    Rigg, David K.; Wacksman, Mitch N.; Iannuzzi, Jacqueline; Baker, Tyler F.; Adams, Marshall; Greeley, Jr., Mark Stephen

    2014-12-18

    For this research, extensive site-specific biological and environmental data were collected to support an evaluation of risks to the fish community in Watts Bar Reservoir from residual ash from the December 2008 Tennessee Valley Authority (TVA) Kingston ash release. This paper describes the approach used and results of the risk assessment for the fish community, which consists of multiple measurement endpoints (measures of exposure and effects) for fish. The lines of evidence included 1) comparing postspill annual fish community assessments with nearby prespill data and data from other TVA reservoirs, 2) evaluating possible effects of exposures of fish eggs and larval fish to ash in controlled laboratory toxicity tests, 3) evaluating reproductive competence of field-exposed fish, 4) assessing individual fish health through physical examination, histopathology, and blood chemistry, 5) comparing fish tissue concentrations with literature-based critical body residues, and 6) comparing concentrations of ash-related contaminants in surface waters with US Environmental Protection Agency's (USEPA) Ambient Water Quality Standards for Fish and Aquatic Life. These measurement endpoints were treated as independent lines of evidence that were integrated into an overall weight-of-evidence estimate of risk to the fish community. Collectively, the data and analysis presented here indicate that ash and ash-related constituents pose negligible risks to the fish communities in Watts Bar Reservoir. This conclusion contradicts the predictions by some researchers immediately following the ash release of devastating effects on the aquatic ecology of Watts Bar Reservoir. The information presented in this article reaffirms the wisdom of carefully evaluating the evidence before predicting probable ecological effects of a major event such as the TVA Kingston ash release. Lastly, this study demonstrates that a thorough and detailed investigation using multiple measurement endpoints is needed

  1. POWER (power optimization for wireless energy requirements): A MATLAB based algorithm for design of hybrid energy systems

    NASA Astrophysics Data System (ADS)

    Cook, K. A.; Albano, F.; Nevius, P. E.; Sastry, A. M.

    We have expanded and implemented an algorithm for selecting power supplies into a turnkey MATLAB code, "POWER" (power optimization for wireless energy requirements). Our algorithm uses three approaches to system design, specifying either: (1) a single, aggregate power profile; (2) a power system designed to satisfy several power ranges (micro-, milli- and Watt); or (3) a power system designed to be housed within specified spaces within the system. POWER was verified by conducting two case studies on hearing prosthetics: the TICA (LZ 3001) (Baumann group at the Tübingen University) and Amadeus cochlear implant (CI) (WIMS-ERC at the University of Michigan) based on a volume constraint of 2 cm 3. The most suitable solution identified by POWER for the TICA device came from Approach 1, wherein one secondary cell provided 26,000 cycles of 16 h operation. POWER identified Approach 2 as the solution for the WIMS-ERC Amadeus CI, which consisted of 1 cell for the microWatt power range and 1 cell for the milliWatt range (4.43 cm 3, ∼55% higher than the target volume), and provided 3280 cycles of 16 h operation (including re-charge of the batteries). Future work will be focused on continuously improving our present tool.

  2. Description of a new Tiporus Watts, 1985 from northern Queensland, Australia (Coleoptera: Dytiscidae, Hydroporinae).

    PubMed

    Hendrich, Lars; Balke, Michael; Watts, Chris H S

    2016-11-09

    Tiporus queenslandicus sp. n. is described from NE Queensland. The new species is similar to T. undecimmaculatus (Clark, 1862) and T. giuliani (Watts, 1978) from the Northern Territory and north-western Australia but well characterized by its larger size, more elongate habitus, and form of median lobe and parameres. Tiporus queenslandicus sp. n. is a lotic species being collected from rest pools of intermittent creeks and rivers with a sandy bottom. Important species-defining characters (habitus, median lobe, paramere, protibia of male) are illustrated. Together with T. queenslandicus sp. n. the genus comprises now 13 species.

  3. Calculation of guaranteed mean power from wind turbine generators

    NASA Technical Reports Server (NTRS)

    Spera, D. A.

    1981-01-01

    A method for calculating the 'guaranteed mean' power output of a wind turbine generator is proposed. The term 'mean power' refers to the average power generated at specified wind speeds during short-term tests. Correlation of anemometers, the method of bins for analyzing non-steady data, the PROP Code for predicting turbine power, and statistical analysis of deviations in test data from theory are discussed. Guaranteed mean power density for the Clayton Mod-OA system was found to be 8 watts per square meter less than theoretical power density at all power levels, with a confidence level of 0.999. This amounts to 4 percent of rated power.

  4. A Novel Photovoltaic Power Converter for Military and Space Applications

    DTIC Science & Technology

    2005-09-01

    improvements are coming in solar cells, batteries, and the power converter. SoLong was initially fitted with 100 LG Chem 18650 -size lithium-ion...the day’s solar energy. So, after receiving the Sanyo 18650 cells that could hold 214 watt-hr./kg., a 15% improvement, and also increasing the number

  5. Solar-Powered Supply Is Light and Reliable

    NASA Technical Reports Server (NTRS)

    Willis, A. E.; Garrett, H.; Matheney, J.

    1982-01-01

    DC supply originally intended for use in solar-powered spacecraft propulsion is lightweight and very reliable. Operates from 100-200 volt output of solar panels to produce 11 different dc voltages, with total demand of 3,138 watts. With exception of specially wound inductors and transformers, system uses readily available components.

  6. 47 CFR 90.1321 - Power and antenna limits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Power and antenna limits. 90.1321 Section 90... and antenna limits. (a) Base and fixed stations are limited to 25 watts/25 MHz equivalent... receiver. (2) If the transmitter employs an antenna system that emits multiple directional beams but...

  7. 47 CFR 90.1321 - Power and antenna limits.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Power and antenna limits. 90.1321 Section 90... and antenna limits. (a) Base and fixed stations are limited to 25 watts/25 MHz equivalent... receiver. (2) If the transmitter employs an antenna system that emits multiple directional beams but...

  8. 47 CFR 90.1321 - Power and antenna limits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Power and antenna limits. 90.1321 Section 90... and antenna limits. (a) Base and fixed stations are limited to 25 watts/25 MHz equivalent... receiver. (2) If the transmitter employs an antenna system that emits multiple directional beams but...

  9. 47 CFR 90.1321 - Power and antenna limits.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Power and antenna limits. 90.1321 Section 90... and antenna limits. (a) Base and fixed stations are limited to 25 watts/25 MHz equivalent... receiver. (2) If the transmitter employs an antenna system that emits multiple directional beams but...

  10. 47 CFR 90.1321 - Power and antenna limits.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Power and antenna limits. 90.1321 Section 90... and antenna limits. (a) Base and fixed stations are limited to 25 watts/25 MHz equivalent... receiver. (2) If the transmitter employs an antenna system that emits multiple directional beams but...

  11. Very high Power THz radiation from Relativistic Electrons

    SciTech Connect

    G.L. Carr; Michael C. Martin; Wayne R. McKinney; Kevin Jordan; George R. Neil; Gwyn P. Williams

    2002-08-01

    We report the production of high power (20 watts average, {approx}1 Megawatt peak) broadband THz light based on coherent emission from relativistic electrons. We describe the source, presenting theoretical calculations and their experimental verification. For clarity we compare this source with one based on ultrafast laser techniques.

  12. 47 CFR 22.759 - Power limit for BETRS.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... radio systems must not exceed the limits in this section. (a) Maximum ERP. The effective radiated power (ERP) of central office and rural subscriber station transmitters in BETRS must not exceed the applicable limits in this paragraph under any circumstances. Frequency range (MHz) Maximum ERP (watts)...

  13. 47 CFR 22.759 - Power limit for BETRS.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... radio systems must not exceed the limits in this section. (a) Maximum ERP. The effective radiated power (ERP) of central office and rural subscriber station transmitters in BETRS must not exceed the applicable limits in this paragraph under any circumstances. Frequency range (MHz) Maximum ERP (watts)...

  14. 47 CFR 22.759 - Power limit for BETRS.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... radio systems must not exceed the limits in this section. (a) Maximum ERP. The effective radiated power (ERP) of central office and rural subscriber station transmitters in BETRS must not exceed the applicable limits in this paragraph under any circumstances. Frequency range (MHz) Maximum ERP (watts)...

  15. 47 CFR 24.232 - Power and antenna height limits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... PERSONAL COMMUNICATIONS SERVICES Broadband PCS § 24.232 Power and antenna height limits. (a)(1) Base...) below. (2) Base stations with an emission bandwidth greater than 1 MHz are limited to 1640 watts/MHz... described in paragraph (b) below. (3) Base station antenna heights may exceed 300 meters HAAT with...

  16. 47 CFR 22.759 - Power limit for BETRS.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... radio systems must not exceed the limits in this section. (a) Maximum ERP. The effective radiated power (ERP) of central office and rural subscriber station transmitters in BETRS must not exceed the applicable limits in this paragraph under any circumstances. Frequency range (MHz) Maximum ERP (watts)...

  17. High specific energy and specific power aluminum/air battery for micro air vehicles

    NASA Astrophysics Data System (ADS)

    Kindler, A.; Matthies, L.

    2014-06-01

    Micro air vehicles developed under the Army's Micro Autonomous Systems and Technology program generally need a specific energy of 300 - 550 watt-hrs/kg and 300 -550 watts/kg to operate for about 1 hour. At present, no commercial cell can fulfill this need. The best available commercial technology is the Lithium-ion battery or its derivative, the Li- Polymer cell. This chemistry generally provides around 15 minutes flying time. One alternative to the State-of-the Art is the Al/air cell, a primary battery that is actually half fuel cell. It has a high energy battery like aluminum anode, and fuel cell like air electrode that can extract oxygen out of the ambient air rather than carrying it. Both of these features tend to contribute to a high specific energy (watt-hrs/kg). High specific power (watts/kg) is supported by high concentration KOH electrolyte, a high quality commercial air electrode, and forced air convection from the vehicles rotors. The performance of this cell with these attributes is projected to be 500 watt-hrs/kg and 500 watts/kg based on simple model. It is expected to support a flying time of approximately 1 hour in any vehicle in which the usual limit is 15 minutes.

  18. Progress in GaAs Metamorphic HEMT Technology for Microwave Applications. High Efficiency Ka-Band MHEMT Power MMICs

    NASA Technical Reports Server (NTRS)

    Smith, P. M.; Dugas, D.; Chu, K.; Nichols, K.; Duh, K. H.; Fisher, J.; MtPleasant, L.; Xu, D.; Gunter, L.; Vera, A.

    2003-01-01

    This paper reviews recent progress in the development of GaAs metamorphic HEMT (MHEMT) technology for microwave applications. Commercialization has begun, while efforts to further improve performance, manufacturability and reliability continue. We also report the first multi-watt MHEMT MMIC power amplifiers, demonstrating up to 3.2W output power and record power-added efficiency (PAE) at Ka-band.

  19. Mobile electric power

    NASA Astrophysics Data System (ADS)

    Bloomfield, Valerie J.; Bloomfield, David P.; Johnson, Bradley Q.

    1992-01-01

    Analytic Power has proven the feasibility of a mobile electric power unit in the form of a hydride fueled ion-exchange membrane (IEM) fuel cell stack. We have over 5 years experience building and testing IEM fuel cells. The power section of a 350 watt fuel cell stack weighs 4.65 pounds based on our five cell sub-stack component weights. The composite stack structure is fabricated from two components; a unitized flow field and catalyzed membrane. The lightweight unitized flow field concept was proven in the first three months of the contract. A single unit flow field weighs 0.155 pounds and can seal to 60 psi. The single cell catalyzed Nafion membrane exceeded our performance goal of 0.6 volts at 100 ASF. Stack performance points were 0.42 volts at 113 ASF and .75 volts at 96 ASF.

  20. Mobile electric power

    SciTech Connect

    Bloomfield, V.J.; Bloomfield, D.P.; Johnson, B.Q.

    1992-01-30

    Analytic Power has proven the feasibility of a mobile electric power unit in the form of a hydride fueled ion-exchange membrane (IEM) fuel cell stack. We have over 5 years experience building and testing IEM fuel cells. The power section of a 350 watt fuel cell stack weighs 4.65 pounds based on our five cell sub-stack component weights. The composite stack structure is fabricated from two components; a unitized flow field and catalyzed membrane. The lightweight unitized flow field concept was proven in the first three months of the contract. A single unit flow field weighs 0.155 pounds and can seal to 60 psi. The single cell catalyzed Nafion membrane exceeded our performance goal of 0.6 volts at 100 ASF. Stack performance points were 0.42 volts at 113 ASF and .75 volts at 96 asf.

  1. Present and future mass standards for the LNE watt balance and the future dissemination of the mass unit in France

    NASA Astrophysics Data System (ADS)

    Pinot, Patrick; Beaudoux, Florian; Bentouati, Djilali; Espel, Patrick; Madec, Tanguy; Thomas, Matthieu; Silvestri, Zaccari; Ziane, Djamel; Piquemal, François

    2016-08-01

    The value of the Planck constant h was determined in 2014 by means of the LNE watt balance experiment. The relative standard uncertainty was 31 parts in 108. This first determination was performed in air with a 500 g mass standard made from XSH Alacrite. The main uncertainty components in air associated with the mass involve the calibration, the mass stability, the buoyancy correction and the magnetic interaction correction. The combined relative uncertainty due to the mass is 7.2 parts in 108. The use in 2016 of a mass standard made from platinum iridium alloy significantly reduces the component of uncertainty arising from the mass standard for a Planck constant measurement either in air or under vacuum. The relative uncertainty due to this contribution is estimated to be about 3 parts in 108 in air and one part in 108 under vacuum. The future system for the dissemination of the mass unit using the LNE watt balance will be based on a primary realization with three 500 g mass standards made from platinum-iridium alloy, pure iridium and Udimet 720 respectively, coupled with a pool of kilograms made from different materials. Pure iridium and Udimet 720 are new materials to make reference mass standards proposed by CNAM and LNE respectively and have never been used by any NMI for manufacturing mass standards until now. Some new results concerning their surface behavior are given.

  2. Watts Happening with the Sun in Massachusetts, in Maryland, in Minnesota

    ERIC Educational Resources Information Center

    Modern Schools, 1974

    1974-01-01

    Solar energy is ideal for supplemental applications with electric heating systems. Looks at what the National Science Foundation, in conjunction with major manufacturers, is doing about solar power for school systems. (Author)

  3. Watt-level red-emitting diode lasers and modules for display applications

    NASA Astrophysics Data System (ADS)

    Paschke, Katrin; Blume, Gunnar; Feise, David; Pohl, Johannes; Sumpf, Bernd

    2016-02-01

    Red-emitting lasers for display applications require high output powers and a high visibility. We demonstrate diode lasers and modules in the red spectral range based on AlGaInP with optical output powers up to 1 W and a nearly diffraction limited beam. These high-luminance light sources based on tapered lasers are well suited for laser TVs and projectors for virtual reality simulators based on the flying spot technology. Additionally, we developed diode lasers with internal distributed Bragg reflector (DBR) surface gratings. These DBR tapered lasers and master-oscillator power-amplifiers based on DBR ridge-waveguide lasers and tapered amplifiers feature high power, single mode emission with coherence lengths up to several meters, which are suitable for the next-generation 3D displays based on holography.

  4. On-orbit performance of the 12 GHz, 200 watt transmitter experiment package for CTS

    NASA Technical Reports Server (NTRS)

    Alexovich, R. E.

    1977-01-01

    Performance characteristics from on-orbit tests of the transmitter experiment package (TEP) for the Communications Technology Satellite (CTS) are presented. The TEP consists of a power processing system (PPS), an output stage tube (OST) and a variable conductance heat pipe system (VCHPS), all of which are described. Test results presented include efficiencies, RF output power, frequency response, and performance with single and multiple (two) carriers, frequency-modulated by video signals.

  5. Army Science Conference 2006 TECHNOLOGY ASSESSMENT OF SOLDIER & MAN PORTABLE FUEL CELL POWER

    DTIC Science & Technology

    2006-11-27

    Research Development Engineering Center (CERDEC) Fuel Cell Technology Team initiated several development contracts to address multiple areas where fuel cell technologies... fuel cell technology focuses specifically on Soldier worn power equipment, mainly from the sub to 100 Watt range. Man Portable Power fuel cell technology

  6. The design of a linear L-band high power amplifier for mobile communication satellites

    NASA Technical Reports Server (NTRS)

    Whittaker, N.; Brassard, G.; Li, E.; Goux, P.

    1990-01-01

    A linear L-band solid state high power amplifier designed for the space segment of the Mobile Satellite (MSAT) mobile communication system is described. The amplifier is capable of producing 35 watts of RF power with multitone signal at an efficiency of 25 percent and with intermodulation products better than 16 dB below carrier.

  7. Design and Prototype Development of a Wireless Power Transmission System for a Micro Air Vehicle (MAV).

    DTIC Science & Technology

    1999-06-01

    assembled, each consisting of microwave rectifier, antenna and a miniature DC motor . It was demonstrated that a 1.8-Watt, 1.3-GHz microwave signal could...power the DC motor at free space distance of 30 inches from transmitting antenna to prototype MAV. Greater operating distances are proposed by using higher transmitting power and antenna gain.

  8. 30 Watts mid-infrared optical parametric oscillator based on spectral beam combination technology

    NASA Astrophysics Data System (ADS)

    Shang, Yaping; Wang, Peng; Li, Xiao; Xu, Xiaojun

    2017-01-01

    Limited by the thermal effects and the laser-induced damage characteristics of the non-linear crystals, mid-infrared (MIR) output power of single optical parametric oscillator (OPO) is hard to get further promoted with excellent beam quality. An alternative solution is the multiple-beams combination technology, which exactly provided an effective approach for decreasing the thermal effects and the damage risk of the OPO system under high power operation. In this letter, the experimental study on the spectral beam combination of three idler MIR lasers was carried out for the first time. An optical parametric system with MIR output power of 30 W at 3130nm, 3352nm, and 3670nm was finally obtained. Experimental results indicated that the beam quality M2 factors of the combined laser were measured to be 1.76 and 2.42 in the horizontal and vertical directions, respectively, which confirmed the feasibility of the schematic design.

  9. Performance characteristics of the 12 GHz, 200 watt transmitter experiment package for CTS

    NASA Technical Reports Server (NTRS)

    Miller, E. F.; Fiala, J. L.; Hansen, I. G.

    1975-01-01

    The experiment package consists of a 200 W output stage tube (OST) powered by a power processing system (PPS). Descriptions of both the PPS and OST are given. The PPS provides the necessary voltages with a measured dc/dc conversion efficiency of 89 percent. The OST, a traveling wave tube with multiple collectors, has a saturated rf output power of 224 W and operates at an overall efficiency exceeding 40 percent over an 85 MHz bandwidth at 12 GHz. OST performance given includes frequency response, saturation characteristics, group delay, AM to PM conversion, inter-modulation distortion, and two channel gain suppression. Single and dual channel FM video performance is presented. It was determined that for 12 MHz peak to peak frequency deviation on each channel, dual channel FM television signals can be transmitted through the TEP at 60 W, each channel, with 40 MHz channel spacing (center to center).

  10. Prospector IX: Human Powered Systems Technologies

    DTIC Science & Technology

    1998-04-01

    fabrication of full-scale elasto- meric energy storage units which were tested to investigate energy density, efficiency and stress -relaxation. A...suggest about 1-3 Watts). However, a large voltage (1000V) must be applied to the polymer to get electrical energy out when mechanically stressed . A...harvesting power has not yet been demonstrated, i.e. no prototype device of this nature has been built or tested . Piezoelectric devices

  11. 120 Watt Split-Mount 30 GHz Amplifier for the Advanced Communications Technology Satellite

    NASA Technical Reports Server (NTRS)

    Lazar, John; Jacquez, Andrew

    1996-01-01

    This paper describes an amplifier for a Ka-band communication system. The amplifier consists of two units. The radio frequency (RF) unit is mounted at the antenna to provide power to the antenna, while the power supply unit is located 12 meters away in a control station. The two units are connected by a waveguide run and a set of umbilical cables to provide all the necessary inputs for the operation and protection of the RF unit. Specifications and actual performance data are presented and discussed. Special features of each unit to meet the specifications are described in detail.

  12. High power cladding light strippers

    NASA Astrophysics Data System (ADS)

    Wetter, Alexandre; Faucher, Mathieu; Sévigny, Benoit

    2008-02-01

    The ability to strip cladding light from double clad fiber (DCF) fibers is required for many different reasons, one example is to strip unwanted cladding light in fiber lasers and amplifiers. When removing residual pump light for example, this light is characterized by a large numerical aperture distribution and can reach power levels into the hundreds of watts. By locally changing the numerical aperture (N.A.) of the light to be stripped, it is possible to achieve significant attenuation even for the low N.A. rays such as escaped core modes in the same device. In order to test the power-handling capability of this device, one hundred watts of pump and signal light is launched from a tapered fusedbundle (TFB) 6+1x1 combiner into a high power-cladding stripper. In this case, the fiber used in the cladding stripper and the output fiber of the TFB was a 20/400 0.06/0.46 N.A. double clad fiber. Attenuation of over 20dB in the cladding was measured without signal loss. By spreading out the heat load generated by the unwanted light that is stripped, the package remained safely below the maximum operating temperature internally and externally. This is achieved by uniformly stripping the energy along the length of the fiber within the stripper. Different adhesive and heat sinking techniques are used to achieve this uniform removal of the light. This suggests that these cladding strippers can be used to strip hundreds of watts of light in high power fiber lasers and amplifiers.

  13. Test Report on the Qualification Program for the One-Quarter (1/4) Watt Split Stirling Common Module Cryogenic Cooler.

    DTIC Science & Technology

    1984-01-01

    Stirling Common Module Cryogenic Cooler CONTRACT NO. DAAK70-82-C-0216 January 1984 DTIC ELECTE * A ..... r This docum, ent ::n- I...8217% , ... . . .. , ...-. ... .- . . , -- . -.. , .-.... ’.’ .. ’.’..-’".- ’-.’,-.’*("-."-*. -- - -t . - - - - - -. TEST REPORT ON THE QUALIFICATION PROGRAM for the One-Quarter (1/4) Watt Split Stirling Comon...QUALIFICATION PROGRAM for the One-Quarter (1/4) Watt Split Stirling Common Module Cryogenic Cooler CONTRACT NO. DAAK7O-82-C-0216

  14. Conceptual approach study of a 200 watt per kilogram solar array

    NASA Technical Reports Server (NTRS)

    Stanhouse, R. W.; Fox, D.; Wilson, W.

    1976-01-01

    Solar array candidate configurations (flexible rollup, flexible flat-pact, semi-rigid panel, semi-rigid flat-pack) were analyzed with particular attention to the specific power (W/kg) requirement. Two of these configurations (flexible rollup and flexible flat-pack) are capable of delivering specific powers equal to or exceeding the baseline requirement of 200 W/kg. Only the flexible rollup is capable of in-flight retraction and subsequent redeployment. The wrap-around contact photovoltaic cell configuration has been chosen over the conventional cell. The demand for ultra high specific power forces the selection of ultra-thin cells and cover material. Based on density and mass range considerations, it was concluded that 13 micrometers of FEP Teflon is sufficient to protect the cell from a total proton fluency of 2(10 to the 12th power) particles/sq cm over a three-year interplanetary mission. The V-stiffened, lattice boom deployed, flexible substrate rollup array holds the greatest promise of meeting the baseline requirements set for this study.

  15. Review of the genus Sekaliporus Watts, 1997 with description of a new species from northern Australia (Coleoptera: Dytiscidae, Hydroporinae).

    PubMed

    Hendrich, Lars; Balke, Michael

    2015-07-02

    Sekaliporus davidi sp. n. is described from northern Australia. It is the second species in the genus. It occurs from the Kimberley region in the northwest of Western Australia to north-eastern Queensland. The new species is morphologically similar to S. kriegi Watts, 1997 described from the Kakadu area in the Northern Territory but well characterized by its constantly larger size, six yellowish markings on elytra, the different form of the apical triangular spine of elytra, and the form of the median lobe. Sekaliporus davidi sp. n. is a lotic species from intermittent creeks and slow flowing rivers and their residual pools. Important species characters (median lobes, parameres and colour patterns) of the two species are figured, and notes on their habitats and distribution are given. Both species are capable of flight and were also collected at light.

  16. Spike-timing-dependent plasticity enhanced synchronization transitions induced by autapses in adaptive Newman-Watts neuronal networks.

    PubMed

    Gong, Yubing; Wang, Baoying; Xie, Huijuan

    2016-12-01

    In this paper, we numerically study the effect of spike-timing-dependent plasticity (STDP) on synchronization transitions induced by autaptic activity in adaptive Newman-Watts Hodgkin-Huxley neuron networks. It is found that synchronization transitions induced by autaptic delay vary with the adjusting rate Ap of STDP and become strongest at a certain Ap value, and the Ap value increases when network randomness or network size increases. It is also found that the synchronization transitions induced by autaptic delay become strongest at a certain network randomness and network size, and the values increase and related synchronization transitions are enhanced when Ap increases. These results show that there is optimal STDP that can enhance the synchronization transitions induced by autaptic delay in the adaptive neuronal networks. These findings provide a new insight into the roles of STDP and autapses for the information transmission in neural systems.

  17. Sub-hundred Watt operation demonstration of HVM LPP-EUV source

    NASA Astrophysics Data System (ADS)

    Mizoguchi, Hakaru; Nakarai, Hiroaki; Abe, Tamotsu; Ohta, Takeshi; Nowak, Krzysztof M.; Kawasuji, Yasufumi; Tanaka, Hiroshi; Watanabe, Yukio; Hori, Tsukasa; Kodama, Takeshi; Shiraishi, Yutaka; Yanagida, Tatsuya; Yamada, Tsuyoshi; Yamazaki, Taku; Okazaki, Shinji; Saitou, Takashi

    2014-04-01

    Since 2002, we have been developing a CO2-Sn-LPP EUV light source, the most promising solution as the 13.5 nm high power (>200 W) light source for HVM EUV lithography. Because of its high efficiency, power scalability and spatial freedom around plasma. Our group has proposed several unique original technologies; 1) CO2 laser driven Sn plasma generation, 2) Double laser pulse shooting for higher Sn ionization rate and higher CE. 3) Sn debris mitigation with a magnetic field, 4) Hybrid CO2 laser system that is scalable with a combination of a short pulse oscillator and commercial cw-CO2 amplifiers. 5) High efficient out of band light reduction with grating structured C1 mirror. In past paper we demonstrated in small size (2Hz) experimental device, this experiment shoed the advantage of combining a laser beam at a wavelength of the CO2 laser system with Sn plasma to achieve high CE>4.7% (in maximum) from driver laser pulse energy to EUV in-band energy 1). In this paper we report the further updated results from last paper. (1) 20um droplets at 100kHz operation was successfully ejected by downsized nozzle and demonstrated dramatical improvement of debris on the collector mirror. We have been developing extension of high CE operation condition at 20kHz range, We have reported component technology progress of EUV light source system. (2)New generation collector mirror with IR reduction technology is equipped in mirror maker. (3)20kW CO2 laser amplifier system is demonstrated cooperate with Mitsubishi electric. (4) We develop new Proto #2 EUV LPP source system and demonstrated 200W EUV plasma power (43W EUV clean power at I/F ) at 100kHz operation was confirmed. (5) High conversion efficiency (CE) of 3.9% at 20kHz operation was confirmed in using pico-second pre-pulse laser. (6)Improvement of CO2 laser power from 8kW to 12kW is now on going by installation of new pre-amplifier. (7)Power-up scenario of HVM source is reported, target shipment of first customer beta LPP

  18. Sub-watt threshold, kilohertz-linewidth Raman distributed-feedback fiber laser.

    PubMed

    Shi, Jindan; Shaif-ul Alam; Ibsen, Morten

    2012-05-01

    We report a low-threshold, narrow linewidth Raman distributed-feedback (R-DFB) fiber laser at 1109.54 nm based on a 30 cm long center π phase-shifted Bragg grating written directly in a commercially available germano-silica (Ge/Si) fiber. The R-DFB was pumped by a continuous-wave (CW) linearly polarized fiber source at 1064 nm, and the threshold power, full width at half-maximum (FWHM) linewidth and slope efficiency with respect to the incident pump power are measured to be 440 mW, <2.5  kHz (measured with a 29.75 km fiber delay line) and 13.5%, respectively. An rf spectrum analyzer confirms that the R-DFB fiber laser exhibits single-frequency performance.

  19. Electric Propulsion of a Different Class: The Challenges of Testing for MegaWatt Missions

    DTIC Science & Technology

    2012-08-01

    power Hall thruster known to date. First, a shakedown period will be undertaken using krypton as the propellant. The use of a cheaper propellant...i.e., krypton compared to xenon) to initially “burn in” the thruster and to determine possible failure modes is a method that is generally applicable...Manzella, D. ൺ kW Class Krypton Hall Thruster Performance," Joint Propulsion Conference, AIAA-03-4550. AIAA, Huntsville, Alabama, 2003. D ow nl oa

  20. Future planetary missions potentially requiring Radioisotope Power Systems

    NASA Astrophysics Data System (ADS)

    Mondt, Jack F.; Nesmith, Bill J.

    2000-01-01

    This paper summarizes the potential Radioisotope Power System, (RPS), technology requirements for future missions being planned for NASA's Solar System Exploration (SSE) theme. Many missions to the outer planets (Jupiter and beyond) require completion of the work on advanced radioisotope power systems (ARPS) now underway in NASA's Deep Space Systems Technology Program. The power levels for the ARPS can be divided into four classes. Forty to one hundred milliwatt-class provides both thermal and electric power for small in situ science laboratories on the surface of bodies in the solar system. One to two watt class for surface and aerobot science laboratories. Ten to twenty-watt class for micro satellites in orbit, surface science stations and aerobots. One hundred to two hundred watt class for orbiter science spacecraft, for drilling core samples, for powering subsurface hydrobots and cryobots on accessible bodies and for data handling and communicating data from small orbiters, surface laboratories, aerobots and hydrobots back to Earth. Using the most optimistic solar-based power system instead of advanced RPSs pushes the launch masses of these missions beyond the capability of affordable launch vehicles. Advanced RPS is also favored over solar power for obtaining comet samples on extended-duration missions. .

  1. On-orbit performance of the 12 GHz, 200 watt transmitter experiment package for CTS

    NASA Technical Reports Server (NTRS)

    Alexovich, R. E.

    1977-01-01

    Performance characteristics from on-orbit tests of the Transmitter Experiment Package (TEP) for the Communications Technology Satellite (CTS) are presented. The TEP consists of a Power Processing System (PPS), an Output Stage Tube (OST), and a Variable Conductance Heat Pipe System (VCHPS), all of which are described. The OST is a coupled-cavity traveling-wave tube with a multistage depressed collector and a stepped velocity-tapered slow-wave structure for efficiency enhancement. It has an RF output power of 240 W and an overall efficiency of 51.5% at a center band frequency of 12.080 GHz. The PPS provides the required operating voltages, regulation, control, and protection for the OST. It has a measured dc-dc conversion efficiency of 86.5% to 88.5%. The VCHPS consists of a fin radiator and three dual-artery stainless steel heat pipes using methanol and a mixture of inert gases. Test results presented include efficiencies, RF output power, frequency response, and performance with single and multiple (two) carriers frequency-modulated by video signals.

  2. Performance of the 12 GHz, 200 watt Transmitter Experiment Package for the Hermes Satellite

    NASA Technical Reports Server (NTRS)

    Alexovich, R. E.

    1977-01-01

    Performance characteristics from on-orbit tests of the Transmitter Experiment Package (TEP) for the Hermes Satellite are presented. The tests were conducted from February 8, 1976 through August 8, 1977. The TEP consists of a Power Processing System (PPS), an Output Stage Tube (OST) and a Variable Conductance Heat Pipe System (VCHPS), all of which are described. The OST is a coupled-cavity traveling wave tube with a multistage depressed collector and a stepped velocity-tapered slow wave structure for efficiency enhancement. It has an RF output power of 233 W and overall efficiency of 50.75% at a center band frequency of 12.080 GHz. The PPS provides the required operating voltages, regulation, control and protection for the OST. The VCHPS consists of a fin radiator and three dual-artery stainless steel heat pipes using methanol and a mixture of inert gases. Test results presented include efficiencies, RF output power and body current. A discussion of thermal anomalies which occurred is presented.

  3. Performance characteristics of the 12 GHz, 200 watt Transmitter Experiment Package for CTS. [Communication Technology Satellite

    NASA Technical Reports Server (NTRS)

    Miller, E. F.; Fiala, J. L.; Hansen, I. G.

    1975-01-01

    Measured performance characteristics from ground test of the Transmitter Experiment Package (TEP) for the Communications Technology Satellite are presented. The experiment package consists of a 200 W Output Stage Tube (OST) powered by a Power Processing System (PPS). Descriptions of both the PPS and OST are given. The PPS provides the necessary voltages with a measured dc/dc conversion efficiency of 89 per cent. The OST, a traveling wave tube with multiple collectors, has a saturated rf output power of 224 W and operates at an overall efficiency exceeding 40 per cent over an 85 MHz bandwidth at 12 GHz. OST performance given includes frequency response, saturation characteristics, group delay, AM to PM conversion, intermodulation distortion, and two channel gain suppression. Single and dual channel FM video performance is presented. It was determined that for 12 MHz peak to peak frequency deviation on each channel, dual channel FM television signals can be transmitted through the TEP at 60 W, each channel, with 40 MHz channel spacing (center to center).

  4. 47 CFR 90.267 - Assignment and use of frequencies in the 450-470 MHz band for low power use.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... for low power use. (a) The following frequencies between 450-470 MHz are designated for low-power use... as “low power frequencies.” Pairs are shown but single frequencies are available for simplex... operation on Group A1 frequencies is as follows: Operation Low side of frequency pair (watts) High side...

  5. 47 CFR 90.267 - Assignment and use of frequencies in the 450-470 MHz band for low power use.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... for low power use. (a) The following frequencies between 450-470 MHz are designated for low-power use... as “low power frequencies.” Pairs are shown but single frequencies are available for simplex... operation on Group A1 frequencies is as follows: Operation Low side of frequency pair (watts) High side...

  6. 47 CFR 90.267 - Assignment and use of frequencies in the 450-470 MHz band for low power use.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... for low power use. (a) The following frequencies between 450-470 MHz are designated for low-power use... as “low power frequencies.” Pairs are shown but single frequencies are available for simplex... operation on Group A1 frequencies is as follows: Operation Low side of frequency pair (watts) High side...

  7. The Rise of Netpolitik: How the Internet Is Changing International Politics and Diplomacy. A Report of the Annual Aspen Institute Roundtable on Information Technology (11th, Aspen, Colorado, August 1-4, 2002).

    ERIC Educational Resources Information Center

    Bollier, David

    This document is an interpretive synthesis of the discussion at a conference sponsored by the Aspen Institute that sought to develop new ways to understand how the Internet is changing the powers of the nation-state, the conduct of international relations, and the definitions of nation security. This report examines how the Internet and other…

  8. A stable, high power optically pumped far infrared laser system

    NASA Technical Reports Server (NTRS)

    Farhoomand, Jam; Pickett, Herbert M.

    1988-01-01

    The generation of 1.25 watts of CW laser power at the 119-micron (2522.8 GHz) methanol line is reported. The maximum frequency fluctuation of the free running laser is less than + or - 100 kHz per hour. This laser has also been tested on numerous other lines ranging from 403.7 GHz (HCOOH) to 5260 GHz (CH3OD) with improved power and stability.

  9. Warts and All: Personal Reflections on Social Justice in Counseling Psychology. Reply to Kiselica, Palmer, Thompson and Shermis, and Watts. Rejoinder

    ERIC Educational Resources Information Center

    Goodman, Lisa A.; Liang, Belle; Weintraub, Sarah R.; Helms, Janet E.; Latta, Rachel E.

    2004-01-01

    In their comments regarding Goodman, Liang, Helms, Latta, Sparks, and Weintraub's article "Training Counseling Psychologists as Social Justice Agents: Feminist and Multicultural Principles in Action," Kiselica, Palmer, Thompson and Shermis, and Watts offered a number of useful suggestions for elaborating on social justice theory,…

  10. REMOVAL OF CHEMICAL AND MICROBIAL CONTAMINANTS IN DRINKING WATER - WATTS PREMIER M-2400 POINT-OF-ENTRY REVERSE OSMOSIS DRINKINGWATER TREATMENT SYSTEM

    EPA Science Inventory

    The Watts Premier M-2400 POE RO Drinking Water Treatment System was tested at the NSF Drinking Water Treatment Systems Laboratory for removal of the viruses fr and MS2, the bacteria Brevundimonas diminuta, and chemicals aldicarb, benzene, cadmium, carbofuran, cesium, chl...

  11. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, REMOVAL OF ARSENIC IN DRINKING WATER: WATTS PREMIER M-SERIES M-15,000 REVERSE OSMOSIS TREATMENT SYSTEM

    EPA Science Inventory

    Verification testing of the Watts Premier M-Series M-15,000 RO Treatment System was conducted over a 31-day period from April 26, 2004, through May 26, 2004. This test was conducted at the Coachella Valley Water District (CVWD) Well 7802 in Thermal, California. The source water...

  12. Gas Turbine Energy Conversion Systems for Nuclear Power Plants Applicable to LiFTR Liquid Fluoride Thorium Reactor Technology

    NASA Technical Reports Server (NTRS)

    Juhasz, Albert J.

    2014-01-01

    This panel plans to cover thermal energy and electric power production issues facing our nation and the world over the next decades, with relevant technologies ranging from near term to mid-and far term.Although the main focus will be on ground based plants to provide baseload electric power, energy conversion systems (ECS) for space are also included, with solar- or nuclear energy sources for output power levels ranging tens of Watts to kilo-Watts for unmanned spacecraft, and eventual mega-Watts for lunar outposts and planetary surface colonies. Implications of these technologies on future terrestrial energy systems, combined with advanced fracking, are touched upon.Thorium based reactors, and nuclear fusion along with suitable gas turbine energy conversion systems (ECS) will also be considered by the panelists. The characteristics of the above mentioned ECS will be described, both in terms of their overall energy utilization effectiveness and also with regard to climactic effects due to exhaust emissions.

  13. Conceptual approach study of a 200 watt per kilogram solar array, phase 1

    NASA Technical Reports Server (NTRS)

    Rayl, G. J.; Speight, K. M.; Stanhouse, R. W.

    1977-01-01

    Two alternative designs were studied; one a retractable rollout design and the other a nonretractable foldout configuration. An end of life (EOL) power for either design of 0.79 beginning of life (BOL) is predicted based on one solar flare during a 3 year interplanetary mission. Both array configurations incorporate the features of flexible substrates and cover sheets. A power capacity of 10 kilowatt is achieved in a blanket area of 76 sq m with an area utilization factor of 0.8. A single array consists of two identical solar cell blankets deployed concurrently by a single, coilable longeron boom. An out of plane angle of 8-1/4 deg is maintained between the two blankets so that the inherent inplane stiffness of the blankets may be used to obtain out of plane stiffness. This V-stiffened design results in a 67% reduction in the stiffness requirement for the boom. Since boom mass scales with stiffness, a lower requirement on boom stiffness results in a lower mass for the boom. These solar arrays are designed to be compatible with the shuttle launch environment and shuttle cargo bay size limitations.

  14. Summary report on water quality, sediment and water chemistry data for water and sediment samples collected from source areas to Melton Hill and Watts Bar reservoirs

    SciTech Connect

    Tomaszewski, T.M.; Bruggink, D.J.; Nunn, D.L.

    1995-08-01

    Contamination of surface water and sediments in the Clinch River and Watts Bar Reservoir (CR/WBR) system as a result of past and present activities by the US Department of Energy (DOE) on the Oak Ridge Reservation (ORR) and also activities by non-ORR facilities are being studied by the Clinch River Environmental Restoration Program (CR-ERP). Previous studies have documented the presence of heavy metals, organics, and radionuclides in the sediments of reservoirs in the vicinity. In support of the CR-ERP, during the summer of 1991, TVA collected and evaluated water and sediment samples from swimming areas and municipal water intakes on Watts Bar Reservoir, Melton Hill Reservoir (which is considered part of the Clinch River and Watts Bar Reservoir System), and Norris Reservoir, which was considered a source of less-contaminated reference or background data. Results of this study indicated that the levels of contamination in the samples from the Watts Bar and Melton Hill Reservoir sites did not pose a threat to human health. Despite the numerous studies, until the current work documented by this report, relatively few sediment or water samples had been collected by the CR-ERP in the immediate vicinity of contaminant point sources. This work focused on water and sediment samples taken from points immediately downstream from suspected effluent point sources both on and off the ORR. In August and September, 1994, TVA sampled surface water and sediment at twelve locations in Melton Hill and Watts Bar Reservoirs. Eleven of the sampling sites were selected based on existence of pollutant discharge permits, known locations of hazardous waste sites, and knowledge of past practices. The twelfth sample site was selected as a relatively less contaminated reference site for comparison purposes.

  15. Traveling Wave Tube (TVT) RF Power Combining Demonstration for use in the Jupiter Icy Moons Orbiter (JIMO)

    NASA Technical Reports Server (NTRS)

    Downey, Joseph A.

    2004-01-01

    The Jupiter Icy Moons Orbiter (JIMO) is set to launch between the years 2012 and 2015. It will possibly utilize a nuclear reactor power source and ion engines as it travels to the moons of Jupiter. The nuclear reactor will produce hundreds of kilowatts of power for propulsion, communication and various scientific instruments. Hence, the RF amplification devices aboard will be able to operate at a higher power level and data rate. The initial plan for the communications system is for an output of 1000 watts of RF power, a data rate of at least 10 megabits a second, and a frequency of 32 GHz. A higher data rate would be ideal to fully utilize the instruments aboard JIMO. At NASA Glenn, one of our roles in the JIMO project is to demonstrate RF power combining using multiple traveling wave tubes (TWT). In order for the power of separate TWT s to be combined, the RF output waves from each must be in-phase and have the same amplitude. Since different tubes act differently, we had to characterize each tube using a Network Analyzer. We took frequency sweeps and power sweeps to characterize each tube to ensure that they will behave similarly under the same conditions. The 200 watt Dornier tubes had been optimized to run at a lower power level (120 watts) for their extensive use in the ACTS program, so we also had to experiment with adjusting the voltage settings on several internal components (helix, anode, collector) of the tubes to reach the full 200 watt potential. from the ACTS program. Phase shifters and power attenuators were placed in the waveguide circuit at the inputs to the tubes so that adjustments could be made individually to match them exactly. A magic tee was used to route and combine the amplified electromagnetic RF waves on the tube output side. The demonstration of 200 watts of combined power was successful with efficiencies greater than 90% over a 500 MHz bandwidth. The next step will be to demonstrate the use of three amplifiers using two magic tees by

  16. E-Learning for Power Quality

    NASA Astrophysics Data System (ADS)

    Bauer, Pavol; Nagy, Istvan

    E-learning with pre-solved animations can provide a better understanding of the status and different network options, compared to complex simulation or a set of equations. In this paper, examples of such animations for e-learning for power quality are presented. Different network options in a centralized or distributed power system and power electronics based compensators are introduced in the form of a new web-based, software learning tool. Power flow congestion and the impact of power electronic compensators on the system, including detailed operations of power electronic based compensators are presented. These compensators include SVCs, Statcom and UPFC presented in this paper. Using these animated tools, both system level and component level operation of these devices are presented. Further the frequent solutions of power factor correction (PFC) applied on low power level of several hundred watts are treated in the paper.

  17. High Efficiency Microwave Power Amplifier: From the Lab to Industry

    NASA Technical Reports Server (NTRS)

    Sims, William Herbert, III; Bell, Joseph L. (Technical Monitor)

    2001-01-01

    Since the beginnings of space travel, various microwave power amplifier designs have been employed. These included Class-A, -B, and -C bias arrangements. However, shared limitation of these topologies is the inherent high total consumption of input power associated with the generation of radio frequency (RF)/microwave power. The power amplifier has always been the largest drain for the limited available power on the spacecraft. Typically, the conversion efficiency of a microwave power amplifier is 10 to 20%. For a typical microwave power amplifier of 20 watts, input DC power of at least 100 watts is required. Such a large demand for input power suggests that a better method of RF/microwave power generation is required. The price paid for using a linear amplifier where high linearity is unnecessary includes higher initial and operating costs, lower DC-to-RF conversion efficiency, high power consumption, higher power dissipation and the accompanying need for higher capacity heat removal means, and an amplifier that is more prone to parasitic oscillation. The first use of a higher efficiency mode of power generation was described by Baxandall in 1959. This higher efficiency mode, Class-D, is achieved through distinct switching techniques to reduce the power losses associated with switching, conduction, and gate drive losses of a given transistor.

  18. A 10-watt CW photodissociation laser with IODO perfluoro-tert-butane

    NASA Technical Reports Server (NTRS)

    Tabibi, Bagher; Venable, Demetrius D.

    1989-01-01

    NASA has been investigating the feasibility of direct solar-pumped laser systems for power beaming in space. Among the various gas, liquid, and solid laser systems being proposed as candidates for solar-pumped lasers, the iodine photodissociation gas laser has demonstrated its potential for space application. Of immediate attention is the determination of system requirements and the choice of lasants to improve the system efficiency. The development of an efficient iodine laser depends on the availability of a suitable iodide which has favorable laser kinetics, chemically reversibility, and solar energy utilization. Among the various alkyliodide lasants comparatively tested in a long-pulse system, perfluoro- tert-butyl iodide, T-C4F9I, was found to be the best. However, the operating conditions for the laser medium in a continuously pumped and continuous-flow iodine laser differ considerably from those in the pulsed regime. The results of the continuous wave (CW)) laser performance from t-C4F9I are reported. Perfluoro- n-propyl iodide, n-C3F7I is used for comparison because of its universal use in photodissociation iodine lasers.

  19. High-power red VCSEL arrays

    NASA Astrophysics Data System (ADS)

    Seurin, Jean-Francois; Khalfin, Viktor; Xu, Guoyang; Miglo, Alexander; Li, Daizong; Zhou, Delai; Sundaresh, Mukta; Zou, Wei-Xiong; Lu, Chien-Yao; Wynn, James D.; Ghosh, Chuni

    2013-03-01

    High-power red laser sources are used in many applications such as cosmetics, cancer photodynamic therapy, and DNA sequencing in the medical field, laser-based RGB projection display, and bar-code scanning to name a few. Verticalcavity surface-emitting lasers (VCSELs) can be used as high-power laser sources, as efficient single devices can be configured into high-power two-dimensional arrays and scaled into modules of arrays. VCSELs emit in a circular, uniform beam which can greatly reduce the complexity and cost of optics. Other advantages include a narrow and stable emission spectrum, low speckle of the far-field emission, and good reliability. However, developing efficient red VCSEL sources presents some challenges because of the reduced quantum-well carrier confinement and the increased Aluminum content (to avoid absorption) which increases thermal impedance, and also decreases the DBR index contrast resulting in increased penetration length and cavity losses. We have recently developed VCSEL devices lasing in the visible 6xx nm wavelength band, and reaching 30% power conversion efficiency. We fabricated high-power 2D arrays by removing the GaAs substrate entirely and soldered the chips on high thermal conductivity submounts. Such arrays have demonstrated several Watts of output power at room temperature, in continuous-wave (CW) operation. Several tens of Watts are obtained in QCW operation. Results and challenges of these high-power visible VCSEL arrays will be discussed.

  20. Transport and accumulation of cesium-137 and mercury in the Clinch River and Watts Bar Reservoir system

    SciTech Connect

    Olsen, C.R.; Larsen, I.L.; Lowry, P.D.; Moriones, C.R.; Ford, C.J.; Dearstone, K.C.; Turner, R.R.; Kimmel, B.L.; Brandt, C.C.

    1992-06-01

    Operations and waste disposal activities at the Oak Ridge Y-12 Plant, the Oak Ridge National Laboratory (ORNL), and the Oak Ridge K-25 Site (formerly the Oak Ridge Gaseous Diffusion Plant) on the US Department of Energy (DOE) Oak Ridge Reservation (ORR) have introduced a variety of airborne, liquid, and solid wastes into the surrounding environment. Some of these wastes may affect off-site areas by entering local streams, which ultimately drain into the Clinch and Tennessee river system. Previously reported concentrations of radionuclides, metals and organic compounds in water, sediment, and biota of the Clinch River and Watts Bar Reservoir suggest the presence of a variety of contaminants of possible concern to the protection of human health and the environment. The work reported here represents part of the initial scoping phase for the Clinch River RCRA Facility Investigation. In this work, the distribution of {sup 137}Cs is used to identify contaminant accumulation patterns and potential problem, or hot-spot,'' areas with regard to environmental hazard or human health. Radiocesium was chosen for this scoping effort because (1) its history of release into the Clinch River is reasonably well documented, (2) it is easy and inexpensive to measure by gamma spectrometry, and (3) it is rapidly sorbed to particulate matter and thus serves as a cost-effective tracer for identifying the transport and accumulation patterns of many other particle-reactive contaminants, such as mercury (Hg), lead (Pb), and plutonium (Pu), and polychlorinated biphenyls (PCBs).

  1. Transport and accumulation of cesium-137 and mercury in the Clinch River and Watts Bar Reservoir system. Environmental Restoration Program

    SciTech Connect

    Olsen, C.R.; Larsen, I.L.; Lowry, P.D.; Moriones, C.R.; Ford, C.J.; Dearstone, K.C.; Turner, R.R.; Kimmel, B.L.; Brandt, C.C.

    1992-06-01

    Operations and waste disposal activities at the Oak Ridge Y-12 Plant, the Oak Ridge National Laboratory (ORNL), and the Oak Ridge K-25 Site (formerly the Oak Ridge Gaseous Diffusion Plant) on the US Department of Energy (DOE) Oak Ridge Reservation (ORR) have introduced a variety of airborne, liquid, and solid wastes into the surrounding environment. Some of these wastes may affect off-site areas by entering local streams, which ultimately drain into the Clinch and Tennessee river system. Previously reported concentrations of radionuclides, metals and organic compounds in water, sediment, and biota of the Clinch River and Watts Bar Reservoir suggest the presence of a variety of contaminants of possible concern to the protection of human health and the environment. The work reported here represents part of the initial scoping phase for the Clinch River RCRA Facility Investigation. In this work, the distribution of {sup 137}Cs is used to identify contaminant accumulation patterns and potential problem, or ``hot-spot,`` areas with regard to environmental hazard or human health. Radiocesium was chosen for this scoping effort because (1) its history of release into the Clinch River is reasonably well documented, (2) it is easy and inexpensive to measure by gamma spectrometry, and (3) it is rapidly sorbed to particulate matter and thus serves as a cost-effective tracer for identifying the transport and accumulation patterns of many other particle-reactive contaminants, such as mercury (Hg), lead (Pb), and plutonium (Pu), and polychlorinated biphenyls (PCBs).

  2. Designing tolerance for the misalignment of inner and outer yoke centers in the permanent magnet for watt or joule balance

    NASA Astrophysics Data System (ADS)

    You, Qiang; Xu, JinXin; Fu, Zhuang

    2016-12-01

    A permanent magnet with soft magnetic yokes has been widely adopted in the watt or joule balance for precisely measuring the Planck constant. A circularly symmetric structure is conducive to the alignment of the coil but is also an enormous challenge for machining and assembly. In this paper, we mathematically prove that one of the mechanical requirements—the misalignment of the inner and outer yoke centers—can be compensated by horizontally moving the coil in a 2D magnetic plane and the compensating displacement is analytically calculated. There is a strong linear relationship between the compensating displacement and misalignment of yoke centers. The scaling factor is obtained by reasonable simplification. Then, the method for designing the tolerance for the misalignment of yoke centers is proposed. Although a new equilibrium position can be found when the inner and outer yokes are not concentrically aligned, torque is generated when the coil radially expands with heat and the torque is proportional to the increment of the radius of the coil and the misalignment of the yoke centers.

  3. Reproductive effects assessment of largemouth bass and bluegill in the Watts Bar Lake/Clinch River system

    SciTech Connect

    Niemela, S.L.; McCracken, M.K.; Ivey, L.J.; Greeley, M.S. Jr.

    1995-12-31

    Successful reproduction is key to the survival and maintenance of viable fish populations and therefore an important consideration in ecological risk assessments. In order to evaluate the reproductive health of fish in the Watts Bar Lake/Clinch River system downstream of the Department of Energy facilities in Oak Ridge, TN, largemouth bass (Micropterus salmoides) and bluegill sunfish (Lepomis macrochirus) were collected from seven sites at the beginning of the spawning period and a suite of parameters indicative of reproductive condition were measured. Measures of reproductive condition common to male and female fish included gonadal somatic index (GSI), and plasma concentrations of reproductive hormones. Gender specific analyses included a histological examination of the testes in males and a quantitative evaluation of ovarian parameters in females including determinations of fecundity, the number of vitellogenic and atretic oocytes, and the incidences of ovarian parasites. Evidence of reproductive impairment in largemouth bass at the two sites immediately adjacent to the Oak Ridge Reservation included lower GSIs and reproductive hormone levels (males and females), and reduced fecundity and an increase in the number of atretic oocytes (females). Similar trends were not observed in bluegill sunfish. These findings suggest that reproduction in a top-level predatory fish species, the largemouth bass, may be negatively affected by activities on the Oak Ridge Reservation.

  4. Periodic coupling strength-dependent multiple coherence resonance by time delay in Newman-Watts neuronal networks.

    PubMed

    Wu, Yanan; Gong, Yubing; Xu, Bo

    2013-12-01

    Recently, multiple coherence resonance induced by time delay has been observed in neuronal networks with constant coupling strength. In this paper, by employing Newman-Watts Hodgkin-Huxley neuron networks with time-periodic coupling strength, we study how the temporal coherence of spiking behavior and coherence resonance by time delay change when the frequency of periodic coupling strength is varied. It is found that delay induced coherence resonance is dependent on periodic coupling strength and increases when the frequency of periodic coupling strength increases. Periodic coupling strength can also induce multiple coherence resonance, and the coherence resonance occurs when the frequency of periodic coupling strength is approximately multiple of the spiking frequency. These results show that for periodic coupling strength time delay can more frequently optimize the temporal coherence of spiking activity, and periodic coupling strength can repetitively optimize the temporal coherence of spiking activity as well. Frequency locking may be the mechanism for multiple coherence resonance induced by periodic coupling strength. These findings imply that periodic coupling strength is more efficient for enhancing the temporal coherence of spiking activity of neuronal networks, and thus it could play a more important role in improving the time precision of information processing and transmission in neural networks.

  5. Power System for Venus Surface Exploration

    NASA Technical Reports Server (NTRS)

    Landis, Geoffrey A.; Mellott, Kenneth

    2002-01-01

    A radioisotope power and cooling system is designed to provide electrical power for a probe operating on the surface of Venus. Most foreseeable electronics devices and sensors cannot operate at the 450 C ambient surface temperature of Venus. Because the mission duration is substantially long and the use of thermal mass to maintain an operable temperature range is likely impractical, some type of active refrigeration may be required to keep electronic components at a temperature below ambient. The fundamental cooling parameters are the cold sink temperature, the hot sink temperature, and the amount of heat to be removed. In this instance, it is anticipated that electronics would have a nominal operating temperature of 300 C. Due to the highly thermal convective nature of the high-density (90 bar CO2) atmosphere, the hot sink temperature was assumed to be 50 C, which provided a 500 C temperature of the cooler's heat rejecter to the ambient atmosphere. The majority of the heat load on the cooler is from the high temperature ambient surface environment on Venus, with a small contribution of heat generation from electronics and sensors. Both thermoelectric (RTG) and dynamic power conversion systems were analyzed, based on use of a standard isotope (General-purpose heat source, or GPHS) brick. For the radioisotope Stirling power converter configuration designed, the Sage model predicts a thermodynamic power output capacity of 478.1 watts, which slightly exceeds the required 469.1 watts. The hot sink temperature is 1200 C, and the cold sink temperature is 500 C. The required heat input is 1740 watts. This gives a thermodynamic efficiency of 27.48 %. It is estimated that the mechanical efficiency of the power converter design is on the order of 85 %, based on experimental measurements taken from 500-watt power class, laboratory-tested Stirling engines. The overall efficiency is calculated to be 23.36 %. The mass of the power converter is estimated at approximately 21.6 kg

  6. High voltage solar cell power generating system

    NASA Technical Reports Server (NTRS)

    Levy, E., Jr.; Opjorden, R. W.; Hoffman, A. C.

    1974-01-01

    A laboratory solar power system regulated by on-panel switches has been delivered for operating high power (3 kW), high voltage (15,000 volt) loads (communication tubes, ion thrusters). The modular system consists of 26 solar arrays, each with an integral light source and cooling system. A typical array contains 2,560 series-connected cells. Each light source consists of twenty 500-watt tungsten iodide lamps providing plus or minus 5 percent uniformity at one solar constant. An array temperature of less than 40 C is achieved using an infrared filter, a water-cooled plate, a vacuum hold-down system, and air flushing.

  7. 47 CFR 90.267 - Assignment and use of frequencies in the 450-470 MHz band for low power use.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... operation determine whether a station is within an “80 km circle.” (i) The maximum ERP for low power... ERP for low power operation on these frequencies is as follows: Operation Low side of frequency pair.... (2) Operation on these frequencies is limited to 6 watts ERP for base, mobile or operational...

  8. 47 CFR 90.267 - Assignment and use of frequencies in the 450-470 MHz band for low power use.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... operation determine whether a station is within an “80 km circle.” (i) The maximum ERP for low power... ERP for low power operation on these frequencies is as follows: Operation Low side of frequency pair.... (2) Operation on these frequencies is limited to 6 watts ERP for base, mobile or operational...

  9. Explanation of the Quantum-Mechanical Particle-Wave Duality through the Emission of Watt-Less Gravitational Waves by the Dirac Equation

    NASA Astrophysics Data System (ADS)

    Winterberg, Friedwardt

    2016-01-01

    An explanation of the quantum-mechanical particle-wave duality is given by the watt-less emission of gravitational waves from a particle described by the Dirac equation. This explanation is possible through the existence of negative energy, and hence negative mass solutions of Einstein's gravitational field equations. They permit to understand the Dirac equation as the equation for a gravitationally bound positive-negative mass (pole-dipole particle) two-body configuration, with the mass of the Dirac particle equal to the positive mass of the gravitational field binding the positive with the negative mass particle, and with the mass particles making a luminal "Zitterbewegung" (quivering motion), emitting a watt-less oscillating positive-negative space curvature wave. It is shown that this thusly produced "Zitterbewegung" reproduces the quantum potential of the Madelung-transformed Schrödinger equation. The watt-less gravitational wave emitted by the quivering particles is conjectured to be de Broglie's pilot wave. The hypothesised connection of the Dirac equation to gravitational wave physics could, with the failure to detect gravitational waves by the LIGO antennas and pulsar timing arrays, give a clue to extended theories of gravity, or a correction of astrophysical models for the generation of such waves.

  10. Report on water quality, sediment and water chemistry data for water and sediment samples collected from source areas to Melton Hill and Watts Bar reservoirs

    SciTech Connect

    Tomaszewski, T.M.; Bruggink, D.J.; Nunn, D.L.

    1995-08-18

    Contamination of surface water and sediments in the Clinch River and Watts Bar Reservoir (CR/WBR) system as a result of past and present activities by the US Department of Energy (DOE) on the Oak Ridge Reservation (ORR) and also activities by non-ORR facilities are being studied by the Clinch River Environmental Restoration Program (CR-ERP). Previous studies have documented the presence of heavy metals, organics, and radionuclides in the sediments of reservoirs in the vicinity. In support of the CR-ERP, during the summer of 1991, TVA collected and evaluated water and sediment samples from swimming areas and municipal water intakes on Watts Bar Reservoir, Melton Hill Reservoir and Norris Reservoir, which was considered a source of less-contaminated reference or background data. Despite the numerous studies, until the current work documented by this report, relatively few sediment or water samples had been collected by the CR-ERP in the immediate vicinity of contaminant point sources. This work focused on water and sediment samples taken from points immediately downstream from suspected effluent point sources both on and off the ORR. In August and September, 1994, TVA sampled surface water and sediment at twelve locations in melton Hill and Watts Bar Reservoirs.

  11. Australian Marsh Beetles (Coleoptera: Scirtidae). 8. The new genera
    Cygnocyphon, Eximiocyphon, Paracyphon, Leptocyphon, Tectocyphon,
    and additions to Contacyphon de Gozis, Nanocyphon Zwick and Eurycyphon Watts.

    PubMed

    Zwick, Peter

    2015-07-07

    New monotypic genera proposed are: Cygnocyphon ibex n. gen., n. sp., Eximiocyphon excisus n. gen., n. sp., and Paracyphon avicularis n. gen., n. sp. Also proposed are the new genera Leptocyphon n. gen., with L. furcalonga, n. sp. and L. quadricornutus, n. sp., Tectocyphon n. gen., with T. microphallus n. sp., T. hirsutus n. sp., and T. victoriae n. sp. The diagnosis of genus Eurycyphon Watts is amended, E. fulvus Watts and E. aquilus Watts are partly redescribed. New species are: Eurycyphon barringtoni n. sp., E. castaneus n. sp., E. falcatus n. sp., E. parvus n. sp., E. perlatus n. sp., E. thunguttii, n. sp., E. tomweiri n. sp., and E. tricornis n. sp. Species of Nanocyphon are discussed and N. tasmanicus n. sp. is described. Contacyphon forcipatus n. sp. is described and an apparently introduced population of the European Contacyphon putonii Gozis is reported from West Australia. For comparison with some of the new taxa the redescription of Pseudomicrocara orientalis Armstrong, type species of the genus, is supplemented.

  12. High-power laser arrays for optical computing

    NASA Astrophysics Data System (ADS)

    Zucker, Erik P.; Craig, Richard R.; Mehuys, David G.; Nam, Derek W.; Welch, David F.; Scifres, Donald R.

    1991-12-01

    We demonstrate both common electrode and addressable arrays of single mode semiconductor lasers suitable for optical computing and optical data storage. In the common electrode geometry, eight lasers have been fabricated on a single chip which show excellent spectral and power uniformity. Total optical power obtained from this array has been in excess of 1.2 Watts CW. We have also fabricated two and nine element monolithic, individually addressable arrays with emitter spacings between 10 jim and 150 p m. Separately addressed, each element emits in a single spatial mode to greater than 0.1 Watts. For the nine element array, uniformity of better than 1.0 nanometer in wavelength and 1 milliamp in operating current across the array has been obtained. Results on crosstalk and reliability of the arrays are presented.

  13. Towards the redefinition of the kilogram: a measurement of the Planck constant using the NPL Mark II watt balance

    NASA Astrophysics Data System (ADS)

    Robinson, I. A.

    2012-02-01

    After the elimination of significant mechanical problems, the NPL Mark II moving-coil watt balance made an initial series of measurements in the period from October 2006 to March 2007. Incremental improvements were made to the apparatus in the period from June 2007 to November 2008 and measurements of the Planck constant h were made up to June 2009, with the aim of providing further information to the ongoing efforts to redefine the SI kilogram in terms of a fixed value of the Planck constant. The apparatus was sold to NRC-INMS in early 2009 and was dismantled and shipped to Canada in the period between June and August 2009. In June 2009, just prior to the shipment, a possible source of significant type-B uncertainty in the mass/force exchange was discovered. There was insufficient time to fully investigate and correct the effect so a component has been added to the uncertainty budget to account for its estimated magnitude. The standard uncertainty of the apparatus, without allowance for the mass/force exchange problem, is estimated to be 36 nW W-1, which represents an improvement of almost a factor of two from the previously reported uncertainty of 66 nW W-1, but, allowing for the problem, the uncertainty increases to 200 nW W-1. Further work, once the apparatus is rebuilt in Canada, should eliminate the source of the added uncertainty. The value of h calculated from the measurements made from 2006 to 2009 is 6.626 071 23(133) × 10-34 J s, which represents a change of 43 nW W-1 from the value reported in 2007. The corresponding value of the Avogadro constant, NA, is 6.022 139 78(120) × 1023 mol-1.

  14. Prototype low temperature low power cryocooler

    SciTech Connect

    Pierce, W.G.

    1982-02-01

    Over the past several years considerable interest has developed for low power, low cost mechanical cryocoolers for use in cooling SQUIDS and other superconducting devices. In 1977 Dr. Jim Zimmerman of National Bureau of Standards, Boulder, CO described a stirling cycle cryocooler that exhibited the following desirable characteristics: (1) Low input power (approximately 50 watts connected load); (2) Modest cooling capacity at very low temperature; (3) Constructed of non-ferromagnetic materials; and (4) Simple design. Dr. Zimmerman's intent was to demonstrate the feasibility of constructing a simple low power cryocooler capable of cooling an operational SQUID. After several modifications of the original cryocooler, Dr. Zimmerman successfully operated a point-Contact Nb SQUID on a four-stage stirling cycle cryocooler with a mechanical drive power of approximately 15 watts, and a capacity of few milliwatts at less than 9 Kelvin. During this period Lake Shore Cryotronics, Inc. successfully negotiated an exclusive licensing (for the U.S.) agreement with Oxford Instruments Ltd. concerning a simple patented single stage cryocooler utilizing a slide-valve-controlled gas driven displacer drive head, powered by a remote conventional high speed compressor. The lowest temperature achieved was less than 20 Kelvin with the two stage cylinder/displacer operating at a cycle rate of 2Hz, 100 psi inlet (pressure), and 20 psi outlet pressure.

  15. AMTEC radioisotope power system design and analysis for Pluto Express Fly-By

    SciTech Connect

    Hendricks, T.J.; Huang, C.; Sievers, R.K.

    1997-12-31

    The Pluto Express Fly-By program requires a Radioisotope Power System (RPS) to supply spacecraft power for various internal functions and mission instruments and experiments. AMTEC (Alkali-Metal Thermal-Electric Conversion) power conversion is the DOE-selected technology for an advanced, high-efficiency RPS to power the Pluto Express Fly-By spacecraft. An AMTEC-based RPS using the General Purpose Heat Source (GPHS) has been conceptually designed to satisfy the Pluto Express power requirements. Integrated AMTEC cell and system thermal/electrical design analyses, structural design analyses, and mass analyses were performed to define an optimum system design. Using fresh radioisotope fuel at beginning of mission, the RPS produces 102 watts of power, has a mass of 8.35 kg (specific power density = 12.2 watts/kg), with a system conversion efficiency of 20.3%. Mass/power scale-up estimates have also been generated, indicating that a 150-watt version of this RPS would weigh approximately 11.3 kg. This paper presents and discusses the key features of this RPS design, the design and analysis methodology, and the numerous system and AMTEC cell tradeoff studies establishing the optimum AMTEC-based RPS.

  16. Saving Watts of Energy

    ERIC Educational Resources Information Center

    Raloff, Janet

    1978-01-01

    Presented are different research program developments aimed at reducing the consumption of electrical energy for artificial lights. Explains the idea of the dimmers, where the amount of incoming daylight regulates the current needed for the lamp. (GA)

  17. 100 WATT THERMOELECTRIC GENERATOR.

    DTIC Science & Technology

    GENERATORS , *ENERGY CONVERSION, HEAT EXCHANGERS, THERMOELECTRICITY, THERMOCOUPLES, BLOWERS, MODULES(ELECTRONICS), SILICON ALLOYS, GERMANIUM ALLOYS, COMBUSTION, GASOLINE, VAPORIZATION, FUELS, LEAD COMPOUNDS.

  18. 100 WATT THERMOELECTRIC GENERATOR.

    DTIC Science & Technology

    GENERATORS , THERMOELECTRICITY, THERMOCOUPLES, HEATERS, HEAT TRANSFER, ENERGY CONVERSION, GASOLINE, VOLTAGE REGULATORS, HEAT EXCHANGERS, LIFE EXPECTANCY(SERVICE LIFE), STARTING, PERFORMANCE(ENGINEERING).

  19. High-efficiency solid state power amplifier

    NASA Technical Reports Server (NTRS)

    Wallis, Robert E. (Inventor); Cheng, Sheng (Inventor)

    2005-01-01

    A high-efficiency solid state power amplifier (SSPA) for specific use in a spacecraft is provided. The SSPA has a mass of less than 850 g and includes two different X-band power amplifier sections, i.e., a lumped power amplifier with a single 11-W output and a distributed power amplifier with eight 2.75-W outputs. These two amplifier sections provide output power that is scalable from 11 to 15 watts without major design changes. Five different hybrid microcircuits, including high-efficiency Heterostructure Field Effect Transistor (HFET) amplifiers and Monolithic Microwave Integrated Circuit (MMIC) phase shifters have been developed for use within the SSPA. A highly efficient packaging approach enables the integration of a large number of hybrid circuits into the SSPA.

  20. Space station power semiconductor package

    NASA Technical Reports Server (NTRS)

    Balodis, Vilnis; Berman, Albert; Devance, Darrell; Ludlow, Gerry; Wagner, Lee

    1987-01-01

    A package of high-power switching semiconductors for the space station have been designed and fabricated. The package includes a high-voltage (600 volts) high current (50 amps) NPN Fast Switching Power Transistor and a high-voltage (1200 volts), high-current (50 amps) Fast Recovery Diode. The package features an isolated collector for the transistors and an isolated anode for the diode. Beryllia is used as the isolation material resulting in a thermal resistance for both devices of .2 degrees per watt. Additional features include a hermetical seal for long life -- greater than 10 years in a space environment. Also, the package design resulted in a low electrical energy loss with the reduction of eddy currents, stray inductances, circuit inductance, and capacitance. The required package design and device parameters have been achieved. Test results for the transistor and diode utilizing the space station package is given.

  1. Regenerative Fuel Cells for Space Power and Energy Conversion (NaBH4/H2O2 Fuel Cell Development)

    NASA Technical Reports Server (NTRS)

    Valdez, Thomas I.; Miley, George H.; Luo, Nie; Burton, Rodney; Mather, Joseph; Hawkins, Glenn; Byrd, Ethan; Gu, Lifeng; Shrestha, Prajakti Joshi

    2006-01-01

    A viewgraph presentation describing hydrogen peroxide and sodium borohydride development is shown. The topics include: 1) Motivation; 2) The Sodium Borohydride Fuel Cell; 3) Fuel Cell Comparisons; 4) MEA Optimization; 5) 500-Watt Stack Testing; 6) System Modeling: Fuel Cell Power Source for Lunar Rovers; and 7) Conclusions

  2. Development of a high power 12GHz PPM focused traveling wave tube

    NASA Technical Reports Server (NTRS)

    Lewis, R.

    1975-01-01

    An analytical and experimental program to demonstrate the technical feasibility of a high efficiency coupled cavity traveling wave tube with periodic permanent magnetic focusing operating at 12.06 GHz, with 1 to 2 kilowatts CW power is described. Such a tube would ultimately be used for broadcasting power transmission from a satellite. The electron gun was designed to be demountable with a replaceable cathode, and the tube to be operable in a bakeable vacuum chamber with its collector replaced by a collector. Therefore, the high efficiency design was concerned with the slow wave structure only, utilizing velocity resynchronization. A special adapter was designed which incorporated an electromagnet refocusing section and a collector baseplate to facilitate testing the collector. CW output power of 1000 watts yielding 21.5% electronic efficiency was demonstrated, with a minimum output power of 525 watts across the specified 160 MHz bandwidth.

  3. Isotope powered stirling generator for terrestrial applications

    NASA Astrophysics Data System (ADS)

    Tingey, Garth L.; Sorensen, Gerald C.; Ross, Brad A.

    1995-01-01

    An electric power supply, small enough to be man-portable, is being developed for remote, terrestrial applications. This system is designed for an operating lifetime of five years without maintenance or refueling. A small Radioisotope Stirling Generator (RSG) has been developed. The energy source of the generator is a 60 watt plutonium-238 fuel clad used in the General Purpose Heat Sources (GPHS) developed for space applications. A free piston Stirling ENgine drives a linear alternator to convert the heat to power. The system weighs about 7.5 kg and produces 11 watts AC power with a conversion efficiency of 18.5%. Two engine models have been designed, fabricated, and tested to data: (a) a development model instrumented to confirm and test parameters, and (b) an electrically heated model with an electrical heater equipped power input leads. Critical components have been tested for 10,000 to 20,000 hours. One complete generator has been operating for over 11,000 hours. Radioisotope heated prototypes are expected to be fabricated and tested in late 1995.

  4. Photonic crystal fiber amplifiers for high power ultrafast fiber lasers

    NASA Astrophysics Data System (ADS)

    Alkeskjold, Thomas T.; Laurila, Marko; Weirich, Johannes; Johansen, Mette M.; Olausson, Christina B.; Lumholt, Ole; Noordegraaf, Danny; Maack, Martin D.; Jakobsen, Christian

    2013-12-01

    In recent years, ultrafast laser systems using large-mode-area fiber amplifiers delivering several hundreds of watts of average power has attracted significant academic and industrial interest. These amplifiers can generate hundreds of kilowatts to megawatts of peak power using direct amplification and multi-gigawatts of peak power using pulse stretching techniques. These amplifiers are enabled by advancements in Photonic Crystal Fiber (PCF) design and manufacturing technology. In this paper, we will give a short overview of state-of-the-art PCF amplifiers and describe the performance in ultrafast ps laser systems.

  5. SITE TECHNOLOGY PROFILES - 11TH EDITION, COMPACT DISC

    EPA Science Inventory

    The Superfund Innovative Technology Evaluation (SITE) Program, now in its eleventh year is an integral part of EPA's research into alternative cleanup methods for hazardous waste sites around the nation. The SITE Program was created to encourage the development and routine use o...

  6. A catalogue of quasars and active nuclei: 11th edition

    NASA Astrophysics Data System (ADS)

    Véron-Cetty, M.-P.; Véron, P.

    2003-12-01

    The recent release of the final installement of the 2dF quasar catalogue and of the first part of the Sloan catalogue, almost doubling the number of known QSOs, led us to prepare an updated version of our Catalogue of quasars and active nuclei which now contains 48 921 quasars, 876 BL Lac objects and 15 069 active galaxies (including 11 777 Seyfert 1s). Like the tenth edition, it includes position and redshift as well as photometry (U, B, V) and 6 and 11 cm flux densities when available. We also give a list of all known lensed and double quasars. The catalogue (Table_QSO, Table_BL, Table_AGN and Table_reject) and the list of references are only available in electronic form at the CDS via anomymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/412/399 or at the Observatoire de Haute Provence (http://www.obs-hp.fr/).

  7. Proceedings of the 11th Space Surveillance Workshop, volume 1

    NASA Astrophysics Data System (ADS)

    Miller, R. W.; Sridharan, R.

    1993-04-01

    This report of Proceedings of the 1993 Space Surveillance Workshop includes the following topics: the Maui space surveillance site infrared calibration sources; infrared detection of geosynchronous objects at AMOS; LWIR observations of geosynchronous satellites; LAGEOS-2 launch support navigation at JPL; space surveillance network sensor contribution analysis; NMD-GBR: new X-band sensors at sites in CONUS and USAKA for space surveillance; recent improvements at ALTAIR; enhancements to the ALCOR imaging radar; fiber optic phase control of the like Kickapoo NAVSPASUR transmitter; coherent data recording and signal processing capabilities at Ascension FPQ-15 radar for space surveillance applications; forecasting trans-ionospheric effects to improve space surveillance.

  8. Case Studies in Policy Making. 11th Edition

    DTIC Science & Technology

    2008-01-01

    sufficient for the present. The final AMAN re- port prepared before the war was ready shortly after the cabinet dispersed. Thirty-nine paragraphs of alarming...the information that the Arab attack would come at 1800 that very day. Elazar in turn called Dayan, who al- ready had the same information (it is...mobilization to be ready for a rapid counterattack. Dayan opposed the preemptive air strike for political reasons and thought a full-scale mobilization was

  9. Technical Progress Report (11th Semi-Annual)

    SciTech Connect

    1998-03-31

    The objective of this proposed program is to ensure reliable supply of high-quality natural gas by reducing the cost of treating subquality natural gas containing H2O, CO2, H2S and/or trace quantities of other gaseous impurities by applying high-efficiency contractors with structured packing using physical solvent N-Formyl Morpholine and morpholine additives.

  10. SITE TECHNOLOGY PROFILES - 11TH EDITION - DEMONSTRATION PROGRAM, VOLUME 1

    EPA Science Inventory

    The Superfund Innovative Technology Evaluation (SITE) Program, now in its eleventh year is an integral part of EPA's research into alternative cleanup methods for hazardous waste sites around the nation. The SITE Program was created to encourage the development and routine use o...

  11. Proceedings of the 11th JPL Airborne Earth Science Workshop

    NASA Technical Reports Server (NTRS)

    Green, Robert O.

    2002-01-01

    This publication contains the proceedings of the JPL Airborne Earth Science Workshop forum held to report science research and applications results with spectral images measured by the NASA Airborne Visible/Infrared Imaging Spectrometer (AVIRIS). These papers were presented at the Jet Propulsion Laboratory from March 5-8, 2001. Electronic versions of these papers may be found at the A VIRIS Web http://popo.jpl.nasa.gov/pub/docs/workshops/aviris.proceedings.html

  12. International Conference (11th) on Applied Military Psychology

    DTIC Science & Technology

    1975-05-01

    talked selectively from a paper dealing with (1) a number of factors which affect the ability of the military psychologist to achieve results useful to...produce "one-track-minded people," rather than people who think innovatively and creatively . He noted that in Israel it is possible for someone to...phase from which direction of change cannot be predicted, the role of education and propaganda in affecting such attitudes, and some of the

  13. 11th Symposium on Nuclei in the Cosmos

    NASA Astrophysics Data System (ADS)

    Nuclei in the Cosmos is the most important international meeting in the field of nuclear astrophysics. It brings together nuclear experimentalists, nuclear theorists, astronomers, theoretical astrophysicists, cosmochemists, and others interested in the scientific questions at the interface of nuclear physics and astrophysics. These questions concern, for example, the origin of the elements in the cosmos and the nuclear reactions that occur in the big bang, in stars, and in stellar explosions. Past meetings have been held in Mackinac Island - USA (2008), Geneva - Switzerland (2006), Vancouver - Canada (2004), Fuji-Yoshida - Japan (2002), Aarhus - Denmark (2000), Volos - Greece (1998), Notre Dame - USA (1996), Gran Sasso - Italy (1994), Karlsruhe - Germany (1992), Baden bei Wien - Austria (1990).

  14. NASA Radioisotope Power Conversion Technology NRA Overview

    NASA Technical Reports Server (NTRS)

    Anderson, David J.

    2005-01-01

    The focus of the National Aeronautics and Space Administration's (NASA) Radioisotope Power Systems (RPS) Development program is aimed at developing nuclear power and technologies that would improve the effectiveness of space science missions. The Radioisotope Power Conversion Technology (RPCT) NASA Research Announcement (NRA) is an important mechanism through which research and technology activities are supported in the Advanced Power Conversion Research and Technology project of the Advanced Radioisotope Power Systems Development program. The purpose of the RPCT NRA is to advance the development of radioisotope power conversion technologies to provide higher efficiencies and specific powers than existing systems. These advances would enable a factor of two to four decrease in the amount of fuel and a reduction of waste heat required to generate electrical power, and thus could result in more cost effective science missions for NASA. The RPCT NRA selected advanced RPS power conversion technology research and development proposals in the following three areas: innovative RPS power conversion research, RPS power conversion technology development in a nominal 100 W(sub e) scale; and, milliwatt/multi-watt RPS (mWRPS) power conversion research. Ten RPCT NRA contracts were awarded in 2003 in the areas of Brayton, Stirling, thermoelectric (TE), and thermophotovoltaic (TPV) power conversion technologies. This paper will provide an overview of the RPCT NRA, a summary of the power conversion technologies approaches being pursued, and a brief digest of first year accomplishments.

  15. NASA Radioisotope Power Conversion Technology NRA Overview

    NASA Technical Reports Server (NTRS)

    Anderson, David J.

    2005-01-01

    The focus of the National Aeronautics and Space Administration s (NASA) Radioisotope Power Systems (RPS) Development program is aimed at developing nuclear power and technologies that would improve the effectiveness of space science missions. The Radioisotope Power Conversion Technology (RPCT) NASA Research Announcement (NRA) is an important mechanism through which research and technology activities are supported in the Advanced Power Conversion Research and Technology project of the Advanced Radioisotope Power Systems Development program. The purpose of the RPCT NRA is to advance the development of radioisotope power conversion technologies to provide higher efficiencies and specific powers than existing systems. These advances would enable a factor of 2 to 4 decrease in the amount of fuel and a reduction of waste heat required to generate electrical power, and thus could result in more cost effective science missions for NASA. The RPCT NRA selected advanced RPS power conversion technology research and development proposals in the following three areas: innovative RPS power conversion research, RPS power conversion technology development in a nominal 100We scale; and, milliwatt/multi-watt RPS (mWRPS) power conversion research. Ten RPCT NRA contracts were awarded in 2003 in the areas of Brayton, Stirling, thermoelectric (TE), and thermophotovoltaic (TPV) power conversion technologies. This paper will provide an overview of the RPCT NRA, a summary of the power conversion technologies approaches being pursued, and a brief digest of first year accomplishments.

  16. Advanced Small Free-Piston Stirling Convertors for Space Power Applications

    NASA Astrophysics Data System (ADS)

    Wood, J. Gary; Lane, Neill

    2004-02-01

    This paper reports on the current status of an advanced 35 We free-piston Stirling convertor currently being developed under NASA SBIR Phase II funding. Also described is a further advanced and higher performance ~80 watt free-piston convertor being developed by Sunpower and Boeing/Rocketdyne for NASA under NRA funding. Exceptional overall convertor (engine plus linear alternator) thermodynamic performance (greater than 50% of Carnot) with specific powers around 100 We /kg appear reasonable at these low power levels.

  17. THE HOMACH TMG: A new stirling power source for unattended operation

    SciTech Connect

    McBride, J.R.; Cooke-Yarborough, E.H.

    1984-08-01

    The HOMACH TMG (ThermoMechanical Generator) is a commercially available electrical power source operating on the Stirling cycle principle, and designed for reliable provision of power in the 50 to 500 Watt range, particularly at remote, inaccessible sites. This paper briefly discusses the operational principles of the TMG, and describes the progressive development of the concept over the last 10 years. The construction of the machine is described, and its unique features are highlighted.

  18. Considerations for Choosing Microwave Transistors in High Power Shipboard Search Radars.

    DTIC Science & Technology

    1983-09-30

    transistors, one crucial problem is the matching of the power output from the interaction zone at the emitter periphery to the antenna with high d.c...because they are all diffused and constructed differently; i.e., overlay, fishbone and interdigitated. All have internal matching in both input and output... fishbone - overlay *1 - matrix - interdigitated o Emitter periphery/base area ratio (EP/BA) o RF power per emitter length o Watts per

  19. Energetics of the magnetosphere, revised

    NASA Technical Reports Server (NTRS)

    Stern, D. P.

    1984-01-01

    The approximate magnitudes of power inputs and energies associated with the Earth's magnetosphere were derived. The nearest 40 R sub E of the plasma sheet current receive some 3.10 to the 11th power watt, and much of this goes to the Birkeland currents, which require 1-3 10 to the 11th power watt. Of that energy, about 30% appears as the energy of auroral particles and most of the rest as ionosphere joule heating. The ring current contains about 10 to the 15th power joule at quiet times, several times as much during magnetic storms, and the magnetic energy stored in the tail lobes is comparable. Substorm energy releases may range at 1.5 to 30 10 to the 11th power watt. Compared to these, the local energy release rate by magnetic merging in the magnetosphere is small. Merging is essential for the existence of open field lines, which make such inputs possible. Merging also seems to be implicated in substorms: most of the released energy only becomes evident far from the merging region, though some particles may gain appreciable energy in that region itself, if the plasma sheet is squeezed out completely and the high latitude lobes interact directly.

  20. The 60 GHz solid state power amplifier

    NASA Technical Reports Server (NTRS)

    Mcclymonds, J.

    1991-01-01

    A new amplifier architecture was developed during this contract that is superior to any other solid state approach. The amplifier produced 6 watts with 4 percent efficiency over a 2 GHz band at 61.5 GHz. The unit was 7 x 9 x 3 inches in size, 5.5 pounds in weight, and the conduction cooling through the baseplate is suitable for use in space. The amplifier used high efficiency GaAs IMPATT diodes which were mounted in 1-diode circuits, called modules. Eighteen modules were used in the design, and power combining was accomplished with a proprietary passive component called a combiner plate.

  1. Fishing along the Clinch River arm of Watts Bar reservoir adjacent to the Oak Ridge Reservation, Tennessee: behavior, knowledge and risk perception.

    PubMed

    Rouse Campbell, Kym; Dickey, Richard J; Sexton, Richard; Burger, Joanna

    2002-11-01

    Catching and eating fish is usually viewed as a fun, healthy and safe activity. However, with continuing increases in fish consumption advisories due to the contamination of our environment, anglers have to decide whether or not to eat the fish they catch. The Clinch River arm of Watts Bar Reservoir is under a fish consumption advisory because of elevated PCB concentrations in striped bass (Morone saxatilis), catfish (Ictalurus spp.) and sauger (Stizostedion canadense) due in part from contaminants released from the US Department of Energy's (USDOE's) Oak Ridge Reservation (ORR) in East Tennessee. To obtain information about the demographics, fishing behavior, knowledge, fish consumption and risk perception of anglers, a survey was conducted of 202 people actively fishing either on land or by boat along the Clinch River arm of Watts Bar Reservoir adjacent to the ORR from Melton Hill Dam to the Poplar Creek confluence or on Poplar Creek within ORR boundaries from mid-March to early November 2001. Even though 81% of people interviewed knew about the fish consumption advisories for the study area, 48% of them thought the fish were safe to eat, while 38% ate the fish that they caught from the study area. Approximately 36% of anglers who had knowledge of the fish consumption warnings ate fish from the study area. Providing confirmation that people fish for many reasons, 35% of anglers interviewed did not eat fish at all. The majority of anglers interviewed knew about the fish consumption advisories because of the signs posted throughout the study area. However, few people knew the correct fish advisories. Significantly fewer blacks had knowledge of the fish consumption warnings than whites. Information resulting from this study could be used to design a program with the objective of reaching the people who may be most at risk from eating fish caught from the Clinch River arm of Watts Bar Reservoir.

  2. Lightweight Innovative Solar Array (LISA): Providing Higher Power to Small Spacecraft

    NASA Technical Reports Server (NTRS)

    Johnson, Les; Carr, John; Fabisinski, Leo; Russell,Tiffany; Smith, Leigh

    2015-01-01

    Affordable and convenient access to electrical power is essential for all spacecraft and is a critical design driver for the next generation of smallsats, including cubesats, which are currently extremely power limited. The Lightweight Innovative Solar Array (LISA), a concept designed, prototyped, and tested at the NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama provides an affordable, lightweight, scalable, and easily manufactured approach for power generation in space. This flexible technology has many wide-ranging applications from serving small satellites to providing abundant power to large spacecraft in GEO and beyond. By using very thin, ultra-flexible solar arrays adhered to an inflatable structure, a large area (and thus large amount of power) can be folded and packaged into a relatively small volume. The LISA array comprises a launch-stowed, orbit-deployed structure on which lightweight photovoltaic devices and, potentially, transceiver elements are embedded. The system will provide a 2.5 to 5 fold increase in specific power generation (Watts/kilogram) coupled with a >2x enhancement of stowed volume (Watts/cubic-meter) and a decrease in cost (dollars/Watt) when compared to state-of-the-art solar arrays.

  3. High-power diffusing-tip fibers for interstitial photocoagulation

    NASA Astrophysics Data System (ADS)

    Sinofsky, Edward L.; Farr, Norman; Baxter, Lincoln; Weiler, William

    1997-05-01

    A line of optical fiber based diffusing tips has been designed, developed, and tested that are capable of distributing tens of watts of cw laser power over lengths ranging from two millimeters to over 10 cm. The result is a flexible non-stick diffuser capable of coagulating large volumes of tissue in reasonably short exposures of 3 - 5 minutes. Sub-millimeter diameter devices have a distinct effect on reducing the force needed to insert the applicator interstitially into tissue. Utilizing our design approach, we have produced diffusers based on 200 micrometer core fiber that has delivered over 35 watts of Nd:YAG energy over diffusion lengths as short as 4 mm. These applicators are being tested for applications in oncology, cardiology, electrophysiology, urology and gynecology.

  4. Power Generator with Thermo-Differential Modules

    NASA Technical Reports Server (NTRS)

    Saiz, John R.; Nguyen, James

    2010-01-01

    A thermoelectric power generator consists of an oven box and a solar cooker/solar reflector unit. The solar reflector concentrates sunlight into heat and transfers the heat into the oven box via a heat pipe. The oven box unit is surrounded by five thermoelectric modules and is located at the bottom end of the solar reflector. When the heat is pumped into one side of the thermoelectric module and ejected from the opposite side at ambient temperatures, an electrical current is produced. Typical temperature accumulation in the solar reflector is approximately 200 C (392 F). The heat pipe then transfers heat into the oven box with a loss of about 40 percent. At the ambient temperature of about 20 C (68 F), the temperature differential is about 100 C (180 F) apart. Each thermoelectric module, generates about 6 watts of power. One oven box with five thermoelectric modules produces about 30 watts. The system provides power for unattended instruments in remote areas, such as space colonies and space vehicles, and in polar and other remote regions on Earth.

  5. Design issues and physics for power scaling of quantum-cascade lasers

    NASA Astrophysics Data System (ADS)

    Masselink, W. T.; Semtsiv, M. P.; Flores, Y. V.; Aleksandrova, A.; Kischkat, J.

    2016-10-01

    The quantum-cascade laser (QCL) emitting in the mid-infrared region of 4 to 8 m has been refined to the point that its internal quantum efficiency is approaching fundamental limits. QCLs designed for power typically contain 30-40 cascades, are less than two wavelengths in width, and laser ridge lengths are typically between 3 and 6 mm. Even with state-of-the-art efficiency and thermal management, room temperature operation of such lasers is fundamentally limited to several watts. This paper describes a path to power scaling that is not fundamentally limited. Power requires volume and thermal conductance. We propose that this combination is best achieved using fewer than 15 cascades combined with broad areas. We demonstrate the first room temperature continuous-wave emission of broad-area QCLs and discuss how this scaling concept can deliver MIR emission of 10's of watts at room temperature with beam quality required for high brilliance.

  6. Development of a microprocessor controller for stand-alone photovoltaic power systems

    SciTech Connect

    Millner, A.R.; Kaufman, D.L.

    1984-06-01

    As the cost of photovoltaic modules decreases, system control and related engineering costs become very important. To meet this need for flexibility with a minimum of customizing cost, and yet consume only a few watts of power is within the capabilities of today's microprocessor. The first unit was produced under DOE contract DEN3-310 and tested for NASA at TriSolarCorp. It is 5kW maximum power controlling battery charger which can also be configured as a 5kW batteryless motor drive. The entire controller interfaces with existing 500 watt MPC power modules, operates in a NEMA-4 enclosuer over an ambient temperature range of -25/sup 0/C to /sup +/45/sup 0/C, operates from either a 12V battery or a 40V to 300V dc unregulated solar array or battery bus. The unit design and cost are discussed, and testing is reported.

  7. Special Application Thermoelectric Micro Isotope Power Sources

    SciTech Connect

    Heshmatpour, Ben; Lieberman, Al; Khayat, Mo; Leanna, Andrew; Dobry, Ted

    2008-01-21

    Promising design concepts for milliwatt (mW) size micro isotope power sources (MIPS) are being sought for use in various space and terrestrial applications, including a multitude of future NASA scientific missions and a range of military applications. To date, the radioisotope power sources (RPS) used on various space and terrestrial programs have provided power levels ranging from one-half to several hundred watts. In recent years, the increased use of smaller spacecraft and planned new scientific space missions by NASA, special terrestrial and military applications suggest the need for lower power, including mW level, radioisotope power sources. These power sources have the potential to enable such applications as long-lived meteorological or seismological stations distributed across planetary surfaces, surface probes, deep space micro-spacecraft and sub-satellites, terrestrial sensors, transmitters, and micro-electromechanical systems. The power requirements are in the range of 1 mW to several hundred mW. The primary technical requirements for space applications are long life, high reliability, high specific power, and high power density, and those for some special military uses are very high power density, specific power, reliability, low radiological induced degradation, and very low radiation leakage. Thermoelectric conversion is of particular interest because of its technological maturity and proven reliability. This paper summarizes the thermoelectric, thermal, and radioisotope heat source designs and presents the corresponding performance for a number of mW size thermoelectric micro isotope power sources.

  8. Safety evaluation report related to the operation of Watts Bar Nuclear Plant, Units 1 and 2 (Docket Nos. 50-390 and 50-391). Supplement No. 15

    SciTech Connect

    Tam, P.S.

    1995-06-01

    This report supplements the Safety Evaluation Report (SER), NUREG-0847 (June 1982), Supplement No. 1 (September 1982), Supplement No. 2 (January 1984), Supplement No. 3 (January 1985), Supplement No. 4 (March 1985), Supplement No. 5 (November 1990), Supplement No. 6 (April 1991), Supplement No. 7 (September 1991), Supplement No. 8 (January 1992), Supplement No. 9 (June 1992), Supplement No. 10 (October 1992), Supplement No. 11 (April 1993), Supplement No. 12 (October 1993), Supplement No. 13 (April 1994), and Supplement No. 14 (December 1994) issued by the Office of Nuclear Reactor Regulation of the US Nuclear Regulatory Commission with respect to the application filed by the Tennessee Valley Authority, as applicant and owner, for licenses to operate the Watts Bar Nuclear Plant, Units 1 and 2 (Docket Nos. 50-390 and 50-391). The facility is located in Rhea County, Tennessee, near the Watts Bar Dam on the Tennessee River. This supplement provides recent information regarding resolution of some of the outstanding and confirmatory items, and proposed license conditions identified in the SER.

  9. "Watts per person" paradigm to design net zero energy buildings: Examining technology interventions and integrating occupant feedback to reduce plug loads in a commercial building

    NASA Astrophysics Data System (ADS)

    Yagi Kim, Mika

    As building envelopes have improved due to more restrictive energy codes, internal loads have increased largely due to the proliferation of computers, electronics, appliances, imaging and audio visual equipment that continues to grow in commercial buildings. As the dependency on the internet for information and data transfer increases, the electricity demand will pose a challenge to design and operate Net Zero Energy Buildings (NZEBs). Plug Loads (PLs) as a proportion of the building load has become the largest non-regulated building energy load and represents the third highest electricity end-use in California's commercial office buildings, accounting for 23% of the total building electricity consumption (Ecova 2011,2). In the Annual Energy Outlook 2008 (AEO2008), prepared by the Energy Information Administration (EIA) that presents long-term projections of energy supply and demand through 2030 states that office equipment and personal computers are the "fastest growing electrical end uses" in the commercial sector. This thesis entitled "Watts Per Person" Paradigm to Design Net Zero Energy Buildings, measures the implementation of advanced controls and behavioral interventions to study the reduction of PL energy use in the commercial sector. By integrating real world data extracted from an energy efficient commercial building of its energy use, the results produce a new methodology on estimating PL energy use by calculating based on "Watts Per Person" and analyzes computational simulation methods to design NZEBs.

  10. Nuclear Power System Evolution: MARS Robotics Outposts to Human Exploration

    NASA Astrophysics Data System (ADS)

    Cataldo, Robert L.

    2002-01-01

    NASA has been studying various architectures to explore Mars encompassing sample return; robotic outpost with extended range exploration and possibly leading to eventual human exploration missions. The more demanding missions with longer-range mobility, enhanced surface operations, high rate communications, propellant production, deep drilling at multiple sites, etc., will require larger and more robust power systems beyond the current capability of today's multi-hundred watt space nuclear power systems. The relatively low power levels of the current suite of Mars' missions are met by photovoltaic solar arrays. As the desire for continuous day and night operations, high latitude exploration and extended mission lifetimes increase, the power system designs will also have to change to meet these increased science demands. While future mission planning continues and requirements continue to evolve, one can assess several power system technologies to satisfy both mobile and stationary applications. Certain technologies tend to optimize at different power levels and lifetimes. While current landers require 100's of watts, a human mission could require 100's of kilowatts. The harsh environment of Mars (dust storms, temperature cycling, CO2 atmosphere, dust settling, wind, low atmospheric pressure, etc.) will also pose some significant design challenges to overcome. This paper will discuss the challenges facing solar, isotope and nuclear power systems.

  11. Sun powered aircraft design

    NASA Technical Reports Server (NTRS)

    Maccready, P. B.; Lissaman, P. B. S.; Morgan, W. R.; Burke, J. D.

    1981-01-01

    Two piloted aircraft have been developed and flown powered solely by photovoltaic cells in a program sponsored by the DuPont Company. The 30.8-kg (68-lb), 21.6-m (71-ft) span, Gossamer Penguin was used as a solar test bed, making a 2.6-km (1.6-mile) flight in August 1980. The 88.1-kg (194-lb), 14.3-m (47-ft) span Solar Challenger was developed for long flights in normal turbulence. Stressed to +9 G, it utilizes Kevlar, Nomex honeycomb-graphite sandwich wall tubes, expanded polystyrene foam ribs, and Mylar skin. With a 54.9-kg (121-lb) airframe, 33.1-kg (73-lb) propulsion system, and a 45.4-kg (100-lb) pilot, it flies on 1400 watts. In summer, the projected maximum climb is 1.0 m/s (200 ft/min) at 9,150 m (30,000 ft). Sixty purely solar-powered flights were made during winter 1980-1981. Using thermals, 1,070 m (3,500 ft) was reached with 115-minute duration.

  12. Efficient operation of a diode-pumped multi-watt continuous wave Yb:KYW laser with excellent beam quality

    NASA Astrophysics Data System (ADS)

    Manjooran, S.; Major, A.

    2017-03-01

    A diode end-pumped Yb:KYW laser with 9 W of output power operating at 1045 nm wavelength with the highest slope efficiency of 77.9% when compared to all other diode-pumped Yb:KYW/KGW lasers is reported. The average beam quality (M 2) was 1.07 and the best optical-to-optical efficiency achieved was 36% with respect to the incident pump power.

  13. High average power diode pumped solid state lasers for CALIOPE

    SciTech Connect

    Comaskey, B.; Halpin, J.; Moran, B.

    1994-07-01

    Diode pumping of solid state media offers the opportunity for very low maintenance, high efficiency, and compact laser systems. For remote sensing, such lasers may be used to pump tunable non-linear sources, or if tunable themselves, act directly or through harmonic crystals as the probe. The needs of long range remote sensing missions require laser performance in the several watts to kilowatts range. At these power performance levels, more advanced thermal management technologies are required for the diode pumps. The solid state laser design must now address a variety of issues arising from the thermal loads, including fracture limits, induced lensing and aberrations, induced birefringence, and laser cavity optical component performance degradation with average power loading. In order to highlight the design trade-offs involved in addressing the above issues, a variety of existing average power laser systems are briefly described. Included are two systems based on Spectra Diode Laboratory`s water impingement cooled diode packages: a two times diffraction limited, 200 watt average power, 200 Hz multi-rod laser/amplifier by Fibertek, and TRW`s 100 watt, 100 Hz, phase conjugated amplifier. The authors also present two laser systems built at Lawrence Livermore National Laboratory (LLNL) based on their more aggressive diode bar cooling package, which uses microchannel cooler technology capable of 100% duty factor operation. They then present the design of LLNL`s first generation OPO pump laser for remote sensing. This system is specified to run at 100 Hz, 20 nsec pulses each with 300 mJ, less than two times diffraction limited, and with a stable single longitudinal mode. The performance of the first testbed version will be presented. The authors conclude with directions their group is pursuing to advance average power lasers. This includes average power electro-optics, low heat load lasing media, and heat capacity lasers.

  14. Grid-Parity Solar Power for Department of Defense Installations

    DTIC Science & Technology

    2014-02-01

    Activity Based Costing AOI Angle of Incidence BLCC Building Life Cycle Cost BoS Balance of Systems CIGS Copper, Indium , Gallium , Selenium CO2 Carbon...of 25% renewable by 2025 (EPAct and Executive Order 13423). • Demonstrate that Nanosolar, a San Jose, CA based manufacturer of solar cells and...panels, could build such a solar power plant with low-cost solar cells manufactured in the U.S. • Design and build a Nanosolar power plant for $3.20/watt

  15. AMTEC power systems for remote site applications Conference on alternative powere from space; Conference

    NASA Astrophysics Data System (ADS)

    Hunt, Thomas K.; Ivanenok, Joseph F.; Sievers, Robert K.

    1995-01-01

    The Department of Defense, US Forest Service and the University of Alaska operate more than 200 remote sites in the Arctic. Most of these sites are now operated on fuel-burning thermoelectric converters with an efficiency of less than 4%. The cost of supplying even moderate electric power requirements to remote environmental, treaty monitoring and communication sites is strongly dependent on the fuel delivery requirements. In the Arctic where solar input is frequently unreliable, the problem is particularly severe. On average, these sites need only about 60 watts of electrical power but will burn over 2,200 kg of propane per year for continuous operation. At these power levels, Alkali Metal Thermal to Electric Converter (AMTEC) systems with their projected 20% to 25% thermal to electric conversion efficiency can provide power for these remote sites with potential annual logistics cost savings (primarily in reduced fuel supply costs) reaching tens of millions of dollars.

  16. Future directions in 980-nm pump lasers: submarine deployment to low-cost watt-class terrestrial pumps

    NASA Astrophysics Data System (ADS)

    Gulgazov, Vadim N.; Jackson, Gordon S.; Lascola, Kevin M.; Major, Jo S.; Parke, Ross; Richard, Tim; Rossin, Victor V.; Zhang, Kai

    1999-09-01

    The demands of global bandwidth and distribution are rising rapidly as Internet usage grows. This fundamentally means that more photons are flowing within optical cables. While transmitting sources launches some optical power, the majority of the optical power that is present within modern telecommunication systems originates from optical amplifiers. In addition, modern optical amplifiers offer flat optical gain over broad wavelength bands, thus making possible dense wavelength de-multiplexing (DWDM) systems. Optical amplifier performance, and by extension the performance of the laser pumps that drive them, is central to the future growth of both optical transmission and distribution systems. Erbium-doped amplifiers currently dominate optical amplifier usage. These amplifiers absorb pump light at 980 nm and/or 1480 nm, and achieve gain at wavelengths around 1550 nm. 980 nm pumps achieve better noise figures and are therefore used for the amplification of small signals. Due to the quantum defect, 1480 nm lasers deliver more signal photon per incident photon. In addition, 1480 nm lasers are less expensive than 980 nm lasers. Thus, 1480 nm pump lasers are used for amplification in situations where noise is not critical. The combination of these traits leads to the situation where many amplifiers contain 980 nm lasers to pump the input section of the Er- doped fiber with 1480 nm lasers being used to pump the latter section of Er fiber. This can be thought of as using 980 nm lasers to power an optical pre-amplifier with the power amplification function being pump with 1480 nm radiation. This paper will focus on 980 nm pump lasers and the impact that advances in 980 nm pump technology will have on optical amplification systems. Currently, 980 nm technology is rapidly advancing in two areas, power and reliability. Improving reliability is becoming increasingly important as amplifiers move towards employing more pump lasers and using these pump lasers without redundancy

  17. Mini-Brayton heat source assembly design study. Volume 1: Space shuttle mission. [feasibility of Brayton isotope power system design

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Conceptual design definitions of a heat source assembly for use in nominal 500 watt electrical (W(e)) 1200 W(e)and 2000 W(e) mini-Brayton isotope power systems are reported. The HSA is an independent package which maintains thermal and nuclear control of an isotope fueled heat source and transfers the thermal energy to a Brayton rotating unit turbine-alternator-compressor power conversion unit.

  18. Simulations of table-top watt-class 1 THz radiation sources with two-section periodic structure

    SciTech Connect

    Liu, Weihao Xu, Zhengyuan

    2014-01-07

    Two types of terahertz sources with two-section periodical waveguide structure are studied by simulations. The operation frequency of the rear section (section-II) is the fourth harmonic of that of the front section (section-I), and section-II can operate both in the forward wave region and backward wave region. The critical factor that may affect the proper functioning of this kind of sources—overbunching—is discussed, and the corresponding solutions are proposed. These sources, with millimeter in length, can generate 1 THz wave radiation with power over 1 W, so, they are promising table-top and relatively high power terahertz sources.

  19. Unique Features of Dynamic Isotope Power Systems for High-Requirements Spacecraft

    SciTech Connect

    Raab, Bernard

    1980-08-01

    The Dynamic Isotope Power System, designed for spacecraft requiring prime power in the 500-to-2000 watt range, has been successfully built and ground tested. A number of studies, summarized herein, have demonstrated the advantages of using such a power system instead of the conventional solar system, for a variety of earth-orbit missions. These advantages stem from the unique nature of the dynamic isotope system, different in kind from solar power systems. As a result, in many cases, the spacecraft design can be significantly simplified and more closely harmonized with mission requirements. This overall advantage can be crucial in missions which have stringent pointing, stability, viewing and/or positioning requirements.

  20. High-power coherent GaAs-based monolithic semiconductor lasers

    NASA Astrophysics Data System (ADS)

    Botez, Dan

    2001-11-01

    Stable-beam operation to high coherent powers from large aperture devices can only be obtained from active-photonic- lattice (APL) structures of large built-in index step. Resonant phase-locked arrays of antiguides, so called ROW array, have provided 1.6W CW coherent power from 200micrometers - wide apertures. Two-dimensional surface-emitting APLs combining ROW arrays and DFB-DBR structures with central (pi) phase-shift are capable of providing coherent powers in the multi-watt range. ARROW-type devices, simpler APL structures, hold the potential for emitting 1W single-mode CW power reliability in stable beam patterns.

  1. Parametric Study of Radiator Concepts for a Stirling Radioisotope Power System Applicable to Deep Space Mission

    NASA Technical Reports Server (NTRS)

    Juhasz, Albert J.; Tew, Roy C.; Thieme, Lanny G.

    2000-01-01

    The Department of Energy (DOE) and the NASA Glenn Research Center are developing a Stirling converter for an advanced radioisotope power system to provide spacecraft onboard electric power for NASA deep space missions. This high-efficiency converter is being evaluated as an alternative to replace the much lower efficiency radioisotope thermoelectric generator (RTG). The current power requirement (six years after beginning of mission (BOM) for a mission to Jupiter) is 210 W(sub e) (watts electric) to be generated by two separate power systems, one on each side of the spacecraft. Both two-converter and four-converter system designs are being considered, depending on the amount of required redundancy.

  2. Space power using solar photovoltaic panels: costs and limitations

    SciTech Connect

    Williams, K.A.

    1986-03-01

    Solar photovoltaic panels (SPPs) have been suggested as a possible prime space power source for multi-kilowatt applications within a ballistic missile defense (BMD) system. As a first step in an attempt to assess the affordability of possible BMD space power sources, the limitations and costs of space power satellites using SSPs in conjunction with an electrochemical energy storage system have been investigated. Both high and low earth orbital missions are considered. An extensive literature search was conducted to determine values for the principal technology-driven performance and cost figures of merit. A small computer code was then developed to evaluate the total power cost, including launch, in dollars per watt of desired space power load. The unit costs obtained were found to be heavily influenced by the nature of the mission (altitude) and the attainable specific power for the two major system components.

  3. Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer.

    PubMed

    Chabalko, Matthew J; Shahmohammadi, Mohsen; Sample, Alanson P

    2017-01-01

    Wireless power delivery has the potential to seamlessly power our electrical devices as easily as data is transmitted through the air. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and un-aided charging. We introduce quasistatic cavity resonance (QSCR), which can enable purpose-built structures, such as cabinets, rooms, and warehouses, to generate quasistatic magnetic fields that safely deliver kilowatts of power to mobile receivers contained nearly anywhere within. A theoretical model of a quasistatic cavity resonator is derived, and field distributions along with power transfer efficiency are validated against measured results. An experimental demonstration shows that a 54 m3 QSCR room can deliver power to small coil receivers in nearly any position with 40% to 95% efficiency. Finally, a detailed safety analysis shows that up to 1900 watts can be transmitted to a coil receiver enabling safe and ubiquitous wireless power.

  4. Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer

    PubMed Central

    Shahmohammadi, Mohsen; Sample, Alanson P.

    2017-01-01

    Wireless power delivery has the potential to seamlessly power our electrical devices as easily as data is transmitted through the air. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and un-aided charging. We introduce quasistatic cavity resonance (QSCR), which can enable purpose-built structures, such as cabinets, rooms, and warehouses, to generate quasistatic magnetic fields that safely deliver kilowatts of power to mobile receivers contained nearly anywhere within. A theoretical model of a quasistatic cavity resonator is derived, and field distributions along with power transfer efficiency are validated against measured results. An experimental demonstration shows that a 54 m3 QSCR room can deliver power to small coil receivers in nearly any position with 40% to 95% efficiency. Finally, a detailed safety analysis shows that up to 1900 watts can be transmitted to a coil receiver enabling safe and ubiquitous wireless power. PMID:28199321

  5. High power, short pulses ultraviolet laser for the development of a new x-ray laser

    SciTech Connect

    Meixler, L.; Nam, C.H.; Robinson, J.; Tighe, W.; Krushelnick, K.; Suckewer, S.; Goldhar, J.; Seely, J.; Feldman, U.

    1989-04-01

    A high power, short pulse ultraviolet laser system (Powerful Picosecond-Laser) has been developed at the Princeton Plasma Physics Laboratory (PPPL) as part of experiments designed to generate shorter wavelength x-ray lasers. With the addition of pulse compression and a final KrF amplifier the laser output is expected to have reached 1/3-1/2 TW (10/sup 12/ watts) levels. The laser system, particularly the final amplifier, is described along with some initial soft x-ray spectra from laser-target experiments. The front end of the PP-Laser provides an output of 20--30 GW (10/sup 9/ watts) and can be focussed to intensities of /approximately/10/sup 16/ W/cm/sup 2/. Experiments using this output to examine the effects of a prepulse on laser-target interaction are described. 19 refs., 14 figs.

  6. Watts-level super-compact narrow-linewidth Tm-doped silica all-fiber laser near 1707 nm with fiber Bragg gratings

    NASA Astrophysics Data System (ADS)

    Xiao, X. S.; Guo, H. T.; Lu, M.; Yan, Z. J.; Wang, H. S.; Wang, Y. S.; Xu, Y. T.; Gao, C. X.; Cui, X. X.; Guo, Q.; Peng, B.

    2016-11-01

    Watts-level ultra-short wavelength operation of a Tm-doped all fiber laser was developed by using a 1550 nm Er-doped fiber laser pump source and a pair of fiber Bragg gratings (FBGs). The laser yielded 1.28 W of continuous-wave output at 1707.01 nm with a narrow linewidth of ~44 pm by means of a 20 cm Tm-doped fiber. The dependencies of the slope efficiencies and pump threshold of the Tm-doped fiber laser versus the length of active fiber and reflectivity of the output mirror (FBG) were investigated in detail, in which the maximum average slope efficiency was 36.1%. There is no doubt that this all fiber laser will be a perfect pump source for mid-IR laser output.

  7. CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY: Evolutionary Games on Weighted Newman-Watts Small-World Networks

    NASA Astrophysics Data System (ADS)

    Du, Wen-Bo; Cao, Xian-Bin; Zhao, Lin; Zhou, Hong

    2009-05-01

    We investigate the evolutionary prisoner's dilemma game (PDG) on weighted Newman-Watts (NW) networks. In weighted NW networks, the link weight wij is assigned to the link between the nodes i and j as: wij = (κi · κj)β, where κi(κj) is the degree of node i(j) and β represents the strength of the correlations. Obviously, the link weight can be tuned by only one parameter β. We focus on the cooperative behavior and wealth distribution in the system. Simulation results show that the cooperator frequency is promoted by a large range of β and there is a minimal cooperation frequency around β = - 1. Moreover, we also employ the Gini coefficient to study the wealth distribution in the population. Numerical results show that the Gini coefficient reaches its minimum when β approx - 1. Our work may be helpful in understanding the emergence of cooperation and unequal wealth distribution in society.

  8. Optimal Power Flow Pursuit

    SciTech Connect

    Dall'Anese, Emiliano

    2016-08-01

    Past works that focused on addressing power-quality and reliability concerns related to renewable energy resources (RESs) operating with business-as-usual practices have looked at the design of Volt/VAr and Volt/Watt strategies to regulate real or reactive powers based on local voltage measurements, so that terminal voltages are within acceptable levels. These control strategies have the potential of operating at the same time scale of distribution-system dynamics, and can therefore mitigate disturbances precipitated fast time-varying loads and ambient conditions; however, they do not necessarily guarantee system-level optimality, and stability claims are mainly based on empirical evidences. On a different time scale, centralized and distributed optimal power flow (OPF) algorithms have been proposed to compute optimal steady-state inverter setpoints, so that power losses and voltage deviations are minimized and economic benefits to end-users providing ancillary services are maximized. However, traditional OPF schemes may offer decision making capabilities that do not match the dynamics of distribution systems. Particularly, during the time required to collect data from all the nodes of the network (e.g., loads), solve the OPF, and subsequently dispatch setpoints, the underlying load, ambient, and network conditions may have already changed; in this case, the DER output powers would be consistently regulated around outdated setpoints, leading to suboptimal system operation and violation of relevant electrical limits. The present work focuses on the synthesis of distributed RES-inverter controllers that leverage the opportunities for fast feedback offered by power-electronics interfaced RESs. The overarching objective is to bridge the temporal gap between long-term system optimization and real-time control, to enable seamless RES integration in large scale with stability and efficiency guarantees, while congruently pursuing system-level optimization objectives. The

  9. High brightness laser-diode device emitting 160 watts from a 100 μm/NA 0.22 fiber.

    PubMed

    Yu, Junhong; Guo, Linui; Wu, Hualing; Wang, Zhao; Tan, Hao; Gao, Songxin; Wu, Deyong; Zhang, Kai

    2015-11-10

    A practical method of achieving a high-brightness and high-power fiber-coupled laser-diode device is demonstrated both by experiment and ZEMAX software simulation, which is obtained by a beam transformation system, free-space beam combining, and polarization beam combining based on a mini-bar laser-diode chip. Using this method, fiber-coupled laser-diode module output power from the multimode fiber with 100 μm core diameter and 0.22 numerical aperture (NA) could reach 174 W, with equalizing brightness of 14.2  MW/(cm2·sr). By this method, much wider applications of fiber-coupled laser-diodes are anticipated.

  10. Watt-level erbium-doped all-fiber laser at 3.44 μm.

    PubMed

    Fortin, Vincent; Maes, Frédéric; Bernier, Martin; Bah, Souleymane Toubou; D'Auteuil, Marc; Vallée, Réal

    2016-02-01

    We demonstrate a 3.44 μm all-fiber laser emitting a maximum of 1.5 W at room temperature, the highest continuous power ever generated from a mid-IR fiber oscillator clearly beyond 3 μm. The laser operates on the 4F(9/2)→4I(9/2) transition of erbium-doped fluoride glasses and relies on a dual pumping scheme at 974 and 1976 nm. By combining a dichroic mirror deposited on the input fiber tip and a fiber Bragg grating as an output coupler, a stable laser emission is produced with a FWHM bandwidth of less than 0.6 nm. The laser cavity has an efficiency of 19% with respect to the launched pump power at 1976 nm and no saturation is observed provided 974 nm co-pumping is sufficient. The joint effect of the two pumps is also investigated.

  11. Generation of watt-level single-longitudinal-mode output from cladding-pumped short fiber lasers.

    PubMed

    Qiu, T; Suzuki, S; Schülzgen, A; Li, L; Polynkin, A; Temyanko, V; Moloney, J V; Peyghambarian, N

    2005-10-15

    We generate as much as 1.6 W of continuous-wave 1550 nm single-longitudinal-mode output from a cladding pumped Er-Yb codoped phosphate fiber laser. This power is to our knowledge among the highest in single-longitudinal-mode fiber lasers. The narrowband fiber Bragg grating output coupler is demonstrated to be an effective element for providing the single-longitudinal-mode selection.

  12. Effect of stratospheric aerosols on direct sunlight and implications for concentrating solar power.

    PubMed

    Murphy, Daniel M

    2009-04-15

    Light scattering calculations and data show that stratospheric aerosols reduce direct sunlight by about 4 W for every watt reflected to outer space. The balance becomes diffuse sunlight. One consequence of deliberate enhancement of the stratospheric aerosol layer would be a significant reduction in the efficiency of solar power generation systems using parabolic or other concentrating optics. There also would be a reduction in the effectiveness of passive solar design.

  13. Future Photovoltaic Power Generation for Space-Based Power Utilities

    NASA Astrophysics Data System (ADS)

    Bailey, S.; Landis, G.; Raffaelle, R.; Hepp, A.

    2002-01-01

    dictate a more complicated trade space. Until recently the focus in space cells has been on efficiency rather than cost. In a several billion-dollar spacecraft the cell cost is relatively small at even a thousand dollars per watt, which is approximately the current array cost. This has primarily been true for spacecraft with power needs from a few hundred watts to tens of kilowatts. However, deployment of a large earth orbiting space power system will require major advances in the photovoltaic array weight, stability in the space environment, efficiency, and ultimately the cost of production and deployment of such arrays. The development of large space power systems, and a host of other proposed space missions, will require the development of viable thin film arrays. The specific power required is almost 40 times what is presently available in commercial arrays. While high efficiency ultra lightweight arrays are not likely to become commercially available anytime soon, advances in thin film photovoltaics may still impact other space technologies (i.e., thin film integrated power supplies) and thus support a broad range of missions in the next decade. Mission examples include micro- air vehicles, ultra-long duration balloons (e.g. Olympus), deep space solar electric propulsion (SEP) "Tug" Array, Mars SEP Array, and Mars surface power outpost. A discussion of the state of the art of thin film cells and their characteristics will be included, particularly focused on their applicability to the space environment. This survey of thin film cells will also include a discussion of inorganic/organic solar cells and their adaptability to the space environment. Enhancements to the efficiency of thin film cells, such as intermediate band quantum dots will be discussed and results presented for current cell configurations.

  14. 1.34 µm picosecond self-mode-locked Nd:GdVO4 watt-level laser

    NASA Astrophysics Data System (ADS)

    Han, Ming; Peng, Jiying; Li, Zuohan; Cao, Qiuyuan; Yuan, Ruixia

    2017-01-01

    With a simple linear configuration, a diode-pumped, self-mode-locked Nd:GdVO4 laser at 1.34 µm is experimentally demonstrated for the first time. Based on the aberrationless theory of self-focusing and thermal lensing effect, through designing and optimizing the resonator, a pulse width as short as 9.1 ps is generated at a repetition rate of 2.0 GHz and the average output power is 2.51 W. The optical conversion efficiency and the slope efficiency for the stable mode-locked operation are approximately 16.7% and 19.2%, respectively.

  15. Wind-powered asynchronous AC/DC/AC converter system. [for electric power supply regulation

    NASA Technical Reports Server (NTRS)

    Reitan, D. K.

    1973-01-01

    Two asynchronous ac/dc/ac systems are modelled that utilize wind power to drive a variable or constant hertz alternator. The first system employs a high power 60-hertz inverter tie to the large backup supply of the power company to either supplement them from wind energy, storage, or from a combination of both at a preset desired current; rectifier and inverter are identical and operate in either mode depending on the silicon control rectifier firing angle. The second system employs the same rectification but from a 60-hertz alternator arrangement; it provides mainly dc output, some sinusoidal 60-hertz from the wind bus and some high harmonic content 60-hertz from an 800-watt inverter.

  16. A high specific power solar array for low to mid-power spacecraft

    NASA Technical Reports Server (NTRS)

    Jones, P. Alan; White, Stephen F.; Harvey, T. Jeffery; Smith, Brian S.

    1993-01-01

    UltraFlex is the generic term for a solar array system which delivers on-orbit power in the 400 to 6,000 watt per wing sizes with end-of-life specific power performance ranging to 150 watts-per-kilogram. Such performance is accomplished with off-the-shelf solar cells and state-of the-art materials and processes. Much of the recent work in photovoltaics is centered on advanced solar cell development. Successful as such work has been, no integrated solar array system has emerged which meets NASA's stated goals of 'increasing the end-of-life performance of space solar cells and arrays while minimizing their mass and cost.' This issue is addressed; namely, is there an array design that satisfies the usual requirements for space-rated hardware and that is inherently reliable, inexpensive, easily manufactured and simple, which can be used with both advanced cells currently in development and with inexpensive silicon cells? The answer is yes. The UltraFlex array described incorporates use of a blanket substrate which is thermally compatible with silicon and other materials typical of advanced multi-junction devices. The blanket materials are intrinsically insensitive to atomic oxygen degradation, are space rated, and are compatible with standard cell bonding processes. The deployment mechanism is simple and reliable and the structure is inherently stiff (high natural frequency). Mechanical vibration modes are also readily damped. The basic design is presented as well as supporting analysis and development tests.

  17. Millimeterwave Space Power Grid architecture development 2012

    NASA Astrophysics Data System (ADS)

    Komerath, Narayanan; Dessanti, Brendan; Shah, Shaan

    This is an update of the Space Power Grid architecture for space-based solar power with an improved design of the collector/converter link, the primary heater and the radiator of the active thermal control system. The Space Power Grid offers an evolutionary approach towards TeraWatt-level Space-based solar power. The use of millimeter wave frequencies (around 220GHz) and Low-Mid Earth Orbits shrinks the size of the space and ground infrastructure to manageable levels. In prior work we showed that using Brayton cycle conversion of solar power allows large economies of scale compared to the linear mass-power relationship of photovoltaic conversion. With high-temperature materials permitting 3600 K temperature in the primary heater, over 80 percent cycle efficiency was shown with a closed helium cycle for the 1GW converter satellite which formed the core element of the architecture. Work done since the last IEEE conference has shown that the use of waveguides incorporated into lighter-than-air antenna platforms, can overcome the difficulties in transmitting millimeter wave power through the moist, dense lower atmosphere. A graphene-based radiator design conservatively meets the mass budget for the waste heat rejection system needed for the compressor inlet temperature. Placing the ultralight Mirasol collectors in lower orbits overcomes the solar beam spot size problem of high-orbit collection. The architecture begins by establishing a power exchange with terrestrial renewable energy plants, creating an early revenue generation approach with low investment. The approach allows for technology development and demonstration of high power millimeter wave technology. A multinational experiment using the International Space Station and another power exchange satellite is proposed to gather required data and experience, thus reducing the technical and policy risks. The full-scale architecture deploys pairs of Mirasol sunlight collectors and Girasol 1 GW converter satellites t

  18. The Meteosat Second Generation (MSG) power system

    SciTech Connect

    Haines, J.E.; Levins, D.; Robben, A.; Sepers, A.

    1997-12-31

    Under the direction of the European Meteorological Satellite Organization (EUMETSAT) and the European Space Agency (ESA), space industries within Europe are in the process of developing a new series of larger and more performant geostationary weather satellites. The initial three spacecraft within this new series, which are known by the name of Meteosat Second Generation (MSG), are due to be progressively launched from the year 2000 onwards. The major objective of this mission is the continuation of the European weather watch and space borne atmospheric sensing services provided by the present series of Meteosat spacecraft. To satisfy this mission requirement, the payload compliment to be supported by MSG will consist of a comprehensive earth viewing instrument capable of operating in both the infra-red and visible spectrum, an earth radiation measurement system and a search and rescue facility. In furnishing the power needs for these payloads, the power generating element on the spin stabilized MSG spacecraft consists of a body mounted solar array, capable of providing 628 watts of electrical power at the end of seven years of geosynchronous orbital lifetime. The energy storage elements for the spacecraft consists of two, 29 ampere-hour batteries, while centralized power management is achieved by the Power Control Unit (PCU), which satisfies the payload and battery re-charge demands by controlling the available solar array power. Power distribution for the spacecraft electrical loads and heaters is achieved by the Power Distribution Unit (PDU) and for the pyrotechnic devices by the Pyrotechnic Release Unit.

  19. U.S. Department of Energy Space and Defense Power Systems Program Ten-Year Strategic Plan, Volume 1 and Volume 2

    SciTech Connect

    Dwight, Carla

    2013-06-01

    The Department of Energy's Space and Defense Power Systems program provides a unique capability for supplying power systems that function in remote or hostile environments. This capability has been functioning since the early 1960s and counts the National Aeronautics and Space Administration as one of its most prominent customers. This enabling technology has assisted the exploration of our solar system including the planets Jupiter, Saturn, Mars, Neptune, and soon Pluto. This capability is one-of-kind in the world in terms of its experience (over five decades), breadth of power systems flown (over two dozen to date) and range of power levels (watts to hundreds of watts). This document describes the various components of that infrastructure, work scope, funding needs, and its strategic plans going forward.

  20. Abnormal cardiovascular responses induced by localized high power microwave exposure

    SciTech Connect

    Lu, S.-T; Brown, D.O.; Johnson, C.E.; Mathur, S.P. ); Elson, E.C. )

    1992-05-01

    A hypothesis of microwave-induced circulatory under perfusion was tested in ketamine anesthetized rats whose heart rate, mean arterial pressure, pulse pressure, respiration rate, and body temperatures were monitored continuously. Fifty-eight ventral head and neck exposures in a waveguide consisted of sham-exposure and exposure to continuous wave (CW) and pulsed 1.25 GHz microwaves for 5 min. The 0.5 Hz and 16 Hz pulsemodulated microwaves were delivered at 400 kW peak power. The CW microwaves were 2 and 6.4 W. The average specific absorption rate was 4.75 W/kg per watt transmitted in the brain and 17.15 W/kg per watt transmitted in the neck. Respiration rate and mean arterial pressure were not altered. Changes in heart rate and pulse pressure were observed in rats exposed to higher power but not to the lower average power microwaves. Depression of pulse pressure, an indication of a decrease in stroke volume, and increased or decreased heart rate were noted in presence of whole-body hyperthermia. The cardiac output of those animals exposed to higher average power microwaves was considered to be below normal as hypothesized. Decreased cardiac output and normal mean arterial pressure resulted in an increase in the total peripheral resistance which was contrary to the anticipated thermal response of animals.