Science.gov

Sample records for a300 a300-600 a310

  1. 75 FR 16685 - Airworthiness Directives; Airbus Model A300-600 and A310 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-02

    ... confirmed that the defects were the result of de-bonding between the skin and honeycomb core. Such reworks... the skin and honeycomb core. Such reworks were also performed on some rudders fitted on A310 and A300... rudders where production reworks have been identified. This * * * [EASA] AD * * * also requires for the...

  2. 76 FR 27875 - Airworthiness Directives; Airbus Model A300 and A310 Series Airplanes, and Model A300 B4-600, B4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-13

    ... Documents, which are referenced in the A300, A310, and A300-600 Airworthiness Limitations Section (ALS) Part..., A310, and A300-600 Airworthiness Limitations Section (ALS) Part 2. Airbus has recently revised the ALI... the A300, A310, and A300-600 Airworthiness Limitations Section (ALS) Part 2. Airbus has recently...

  3. 76 FR 4260 - Airworthiness Directives; Airbus Model A300 and A310 Series Airplanes, and Model A300 B4-600, B4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-25

    ... the A300, A310, and A300-600 Airworthiness Limitations Section (ALS) Part 2. Airbus has recently... the A300, A310, and A300-600 Airworthiness Limitations Section (ALS) Part 2. Airbus has recently... Limitations Section (ALS) Part 2. Airbus has recently revised the ALI Documents, which have been approved by...

  4. 75 FR 8551 - Airworthiness Directives; Airbus Model A300, A300-600, and A310 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-25

    ... when combined with an air duct leak, air conditioning system contamination or, if installed... combined with an air duct leak, air conditioning system contamination or, if installed, malfunction of the... some cases, the air conditioning system was contaminated with hydraulic mist. The leakage of the check...

  5. 76 FR 28914 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-19

    ... of the rudder system design. Rudder pedal sensitivity on Model A300-600 and A310 series airplanes is... B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes); and Model A310 Series Airplanes AGENCY: Federal Aviation...

  6. 76 FR 36387 - Airworthiness Directives; Airbus Model A300 Series Airplanes; Model A310 Series Airplanes; and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-22

    ... Original August 12, 2010. A300-29-6064 Original August 12, 2010. A310-29-2099, including Appendix 01... (for Model A300- Original....... August 12, 2010. 600 airplanes). A310-29-2099 (for Model A310 Original..., 2010. A310-29-2099 Original........ August 12, 2010. A310-29-2100 Original........ August 12, 2010...

  7. Protection against wing icing for Airbus A300 and A310

    NASA Technical Reports Server (NTRS)

    Woelfer, G.

    1981-01-01

    To improve economy of operation, it is now planned to modify the anti-icing system used on the A300 Airbus wing. Thus, for the A310 Airbus, the deicing system will be applied to only half the wing length. Other essential modifications are a substantial simplification of the warm-air system and discontinuation of the use of a double wall in slats.

  8. 76 FR 33176 - Airworthiness Directives; Airbus Model A300 B4-103, B4-203, and B4-2C Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-08

    ...: One operator reported a failure of the MLG [main landing gear] retraction actuator sliding rod. This...: One operator reported a failure of the MLG [main landing gear] retraction actuator sliding rod. This... inspections of the retraction actuator sliding rod as installed on A300, A300-600 and A300-600ST aeroplanes...

  9. 76 FR 27242 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ... Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes) AGENCY: Federal Aviation... required to conduct a design review against explosion risks. During improvement of the protection of fuel...

  10. 76 FR 6581 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-07

    ... B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes) AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of... design review against explosion risks. During improvement of the protection of fuel pump wiring against...

  11. 75 FR 6849 - Airworthiness Directives; Airbus Model A310-221, -222, -322, -324, and -325 Airplanes, and Model...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-12

    ... Airworthiness Directives; Airbus Model A310-221, -222, -322, - 324, and -325 Airplanes, and Model A300 B4-620... applies to Airbus Model A310-221, -222, -322, -324, and -325 airplanes, and Model A300 B4-620, B4-622, B4... Model A310-221, - 222, -322, -324, and -325 airplanes), both including Appendix 1, both dated October 3...

  12. 15 CFR 8a.310 - Recruitment.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Recruitment. 8a.310 Section 8a.310... in Admission and Recruitment Prohibited § 8a.310 Recruitment. (a) Nondiscriminatory recruitment. A... recruitment and admission of students. A recipient may be required to undertake additional recruitment efforts...

  13. 77 FR 55105 - Aging Airplane Program: Widespread Fatigue Damage; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-07

    ... final rule published November 15, 2010. The final rule required design approval holders of certain... compliance dates of Sec. Sec. 26.21, 121.1115, and 129.115 for Airbus A310 and A300-600 series airplanes... A300 B4-203 30 34,000 FC A300-600 Series 60 30,000 FC/67,500 FH A310-200 Series 60 40,000 FC/60,000 FH...

  14. 75 FR 51698 - Airworthiness Directives; Airbus Model A310 Series Airplanes; and Model A300 B4-600, A300 B4-600R...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-23

    ... the secondary load path, which would likely result in loss of control of the aeroplane. The proposed... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010... demonstration of the THSA upper attachment primary load path elements, only a gimbal having a thickness of 70mm...

  15. 76 FR 22302 - Airworthiness Directives; Airbus Model A310 Series Airplanes; and Model A300 B4-600, A300 B4-600R...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-21

    ... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010... of 70mm (2.76 in). During the fatigue life demonstration of the THSA upper attachment primary load path elements, only a gimbal having a thickness of 70mm (2.76 in) was used. Thereafter, no additional...

  16. The First European Parabolic Flight Campaign with the Airbus A310 ZERO-G

    NASA Astrophysics Data System (ADS)

    Pletser, Vladimir; Rouquette, Sebastien; Friedrich, Ulrike; Clervoy, Jean-Francois; Gharib, Thierry; Gai, Frederic; Mora, Christophe

    2016-12-01

    Aircraft parabolic flights repetitively provide up to 23 seconds of reduced gravity during ballistic flight manoeuvres. Parabolic flights are used to conduct short microgravity investigations in Physical and Life Sciences and in Technology, to test instrumentation prior to space flights and to train astronauts before a space mission. The use of parabolic flights is complementary to other microgravity carriers (drop towers, sounding rockets), and preparatory to manned space missions on board the International Space Station and other manned spacecraft, such as Shenzhou and the future Chinese Space Station. After 17 years of using the Airbus A300 ZERO-G, the French company Novespace, a subsidiary of the ' Centre National d'Etudes Spatiales' (CNES, French Space Agency), based in Bordeaux, France, purchased a new aircraft, an Airbus A310, to perform parabolic flights for microgravity research in Europe. Since April 2015, the European Space Agency (ESA), CNES and the ` Deutsches Zentrum für Luft- und Raumfahrt e.V.' (DLR, the German Aerospace Center) use this new aircraft, the Airbus A310 ZERO-G, for research experiments in microgravity. The first campaign was a Cooperative campaign shared by the three agencies, followed by respectively a CNES, an ESA and a DLR campaign. This paper presents the new Airbus A310 ZERO-G and its main characteristics and interfaces for scientific experiments. The experiments conducted during the first European campaign are presented.

  17. 76 FR 61555 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-05

    ... pieces unit welded, instead of 4 pieces unit with 3 welds (old design) as pictured in Appendix 1 of this... pre-modification 02447. Blue and Green. A300 airplanes post-modification 02447 Blue. A300-600 airplanes Blue. A310 airplanes Green. Table 2--Applicable Service Information Airbus Mandatory Service...

  18. 77 FR 66772 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ..., which are referenced in the A300, A310 and A300-600 Airworthiness Limitations Section (ALS) Part 2..., September 26, 2007)), revise the Airworthiness Limitations Section (ALS) of the Instructions for Continued... April 2006. (n) Retained Revision of the ALS of the ICA This paragraph restates the requirements of...

  19. 76 FR 38069 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-29

    ... the skin and honeycomb core. Such reworks were also performed on some rudders fitted on A310 and A300... defects were the result of de-bonding between the skin and honeycomb core. Such reworks were also... application of corrective actions for those rudders where production reworks have been identified. This new...

  20. 76 FR 19724 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-08

    ... B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively... F4-605R and F4-622R airplanes, and Model A300 C4-605R Variant F airplanes; and Model A310-203, -204...

  1. 75 FR 57880 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-23

    ... docket. Relevant Service Information Airbus has issued Mandatory Service Bulletin A310-27-2099, Revision... Service Bulletin A310-27-2099, dated February 17, 2006; or Airbus Mandatory Service Bulletin A310-27-2099...- 2099, Revision 01, dated March 21, 2008. Note 1: For the purposes of this AD, a detailed inspection is...

  2. 76 FR 421 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-05

    ... accordance with the Accomplishment Instructions of Airbus Service Bulletin A310-27-2099, dated February 17, 2006; or Airbus Mandatory Service Bulletin A310-27-2099, Revision 01, dated March 21, 2008. Repeat the..., use only Airbus Mandatory Service Bulletin A310-27- 2099, Revision 01, dated March 21, 2008. Note 1...

  3. 75 FR 66659 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-29

    .... Applicability (c) This AD applies to all Airbus Model A310-203, -204, -221, - 222, -304, -322, [[Page 66661... first. (ii) For A310-304, -322, -324, and -325 short range airplanes: Within 700 flight cycles or 1,900 flight hours after the effective date of this AD, whichever occurs first. (iii) For A310-304, -322, -324...

  4. 75 FR 39863 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-13

    ..., -322, -324, and -325 airplanes, certificated in any category. Subject (d) Air Transport Association... first. (ii) For A310-304, -322, -324, and -325 short range airplanes: Within 700 flight cycles or 1,900 flight hours after the effective date of this AD, whichever occurs first. (iii) For A310-304, -322, -324...

  5. 76 FR 15870 - Airworthiness Directives; Airbus Model A310 Series Airplanes, and Airbus Model A300 B4-600, B4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-22

    ..., Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE... Building Ground Floor, Room W12-40, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m... than estimated here. Based on these figures, we estimate the cost of the proposed AD on U.S. operators...

  6. 76 FR 15805 - Airworthiness Directives; Airbus Model A310 Series Airplanes, and Airbus Model A300 B4-600, B4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-22

    ... greater than 100 knots and until landing gear retraction. * * * * * Uncommanded movement of the pilot and... until landing gear retraction. AD 2009-0084 required the deactivation of the electrical power of SOGERMA... takeoff phase when the speed of the aeroplane is greater than 100 knots and until landing gear retraction...

  7. 75 FR 74665 - Airworthiness Directives; Airbus Model A310 Airplanes, and Airbus Model A300 B4-600, B4-600R, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-01

    ... landing gear retraction. * * * * * Uncommanded movement of the pilot and co-pilot seats during takeoff or... landing gear retraction. AD 2009-0084 required the deactivation of the electrical power of SOGERMA pilot... retraction. * * * * * Uncommanded movement of the pilot and co-pilot seats during takeoff or landing could...

  8. 75 FR 7942 - Airworthiness Directives; Airbus Model A310-203, -221, -222 Airplanes; and Model A300 F4-605R and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-23

    ... gear retraction. * * * * * The unsafe condition is potential loss of control of the airplane during... when the speed of the aeroplane is greater than 100 knots and until landing gear retraction. To prevent... greater than 100 knots and until landing gear retraction. To prevent further incidents of inadvertent...

  9. 75 FR 11428 - Airworthiness Directives; Airbus Model A300 B2-1C, B2-203, B2K-3C, B4-103, B4-203, B4-2C...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-11

    ...-0789; Directorate Identifier 2008-NM-185-AD; Amendment 39-16228; AD 2010-06-04] RIN 2120-AA64..., A310-54-2018 and A300-54-6015. * * * This AD requires the implementation of this * * * inspection... that table were derived from the note in the Configuration 01 table in paragraph 1.E.(2) of Airbus...

  10. On-board computer progress in development of A 310 flight testing program

    NASA Technical Reports Server (NTRS)

    Reau, P.

    1981-01-01

    Onboard computer progress in development of an Airbus A 310 flight testing program is described. Minicomputers were installed onboard three A 310 airplanes in 1979 in order to: (1) assure the flight safety by exercising a limit check of a given set of parameters; (2) improve the efficiency of flight tests and allow cost reduction; and (3) perform test analysis on an external basis by utilizing onboard flight types. The following program considerations are discussed: (1) conclusions based on simulation of an onboard computer system; (2) brief descriptions of A 310 airborne computer equipment, specifically the onboard universal calculator (CUB) consisting of a ROLM 1666 system and visualization system using an AFIGRAF CRT; (3) the ground system and flight information inputs; and (4) specifications and execution priorities for temporary and permanent programs.

  11. 75 FR 8549 - Airworthiness Directives; Airbus Model A300 Series Airplanes, Airbus Model A300 B4-600 Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-25

    ... rack 101VU by accomplishment of Airbus Service Bulletin (SB) A310-53-2076 was embodied on the aeroplane... the splicing with rack 107VU fitting. This condition, if not detected and corrected, could degrade the structural integrity of the crossbeam on NLG FR15A web attachment fitting of rack 107VU. Rack 107VU contains...

  12. Modern cockpit complexity challenges pilot interfaces.

    PubMed

    Dornheim, M A

    1995-01-30

    Advances in the use of automated cockpits are examined. Crashes at Nagoya and Toulouse in 1994 and incidents at Manchester, England, and Paris Orly are used as examples of cockpit automation versus manual operation of aircraft. Human factors researchers conclude that flight management systems (FMS) should have fewer modes and less authority. Reducing complexity and authority override systems of FMS can provide pilots with greater flexibility during crises. Aircraft discussed include Boeing 737-300 and 757-200, Airbus A300-600 and A310, McDonnell Douglas MD-11, and Tarom A310-300.

  13. 14 CFR 121.1115 - Limit of validity.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... weight is a result of an original type certificate or a later design change. This section also applies to... A300-600 Series 30 30,000 FC/67,500 FH A310-200 Series 30 40,000 FC/60,000 FH A310-300 Series 30 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  14. 14 CFR 129.115 - Limit of validity.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... certificate or a later design change. This section also applies to foreign air carriers or foreign persons... A300-600 Series 30 30,000 FC/67,500 FH A310-200 Series 30 40,000 FC/60,000 FH A310-300 Series 30 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  15. 14 CFR 121.1115 - Limit of validity.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... weight is a result of an original type certificate or a later design change. This section also applies to... A300-600 Series 60 30,000 FC/67,500 FH A310-200 Series 60 40,000 FC/60,000 FH A310-300 Series 60 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  16. 14 CFR 121.1115 - Limit of validity.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... weight is a result of an original type certificate or a later design change. This section also applies to... A300-600 Series 30 30,000 FC/67,500 FH A310-200 Series 30 40,000 FC/60,000 FH A310-300 Series 30 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  17. 14 CFR 129.115 - Limit of validity.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... certificate or a later design change. This section also applies to foreign air carriers or foreign persons... A300-600 Series 60 30,000 FC/67,500 FH A310-200 Series 60 40,000 FC/60,000 FH A310-300 Series 60 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  18. 14 CFR 129.115 - Limit of validity.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... certificate or a later design change. This section also applies to foreign air carriers or foreign persons... A300-600 Series 60 30,000 FC/67,500 FH A310-200 Series 60 40,000 FC/60,000 FH A310-300 Series 60 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  19. 14 CFR 121.1115 - Limit of validity.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... weight is a result of an original type certificate or a later design change. This section also applies to... A300-600 Series 60 30,000 FC/67,500 FH A310-200 Series 60 40,000 FC/60,000 FH A310-300 Series 60 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  20. 14 CFR 129.115 - Limit of validity.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... certificate or a later design change. This section also applies to foreign air carriers or foreign persons... A300-600 Series 30 30,000 FC/67,500 FH A310-200 Series 30 40,000 FC/60,000 FH A310-300 Series 30 35,000 FC/60,000 FH A318 Series 60 48,000 FC/60,000 FH A319 Series 60 48,000 FC/60,000 FH A320-100 Series 60...

  1. Efforts to Develop a 300°C Solder

    SciTech Connect

    Norann, Randy A

    2015-01-25

    This paper covers the efforts made to find a 300°C electrical solder solution for geothermal well monitoring and logging tools by Perma Works LLC. This paper covers: why a high temperature solder is needed, what makes for a good solder, testing flux, testing conductive epoxy and testing intermetallic bonds. Future areas of research are suggested.

  2. Using a Corpus in a 300-Level Spanish Grammar Course

    ERIC Educational Resources Information Center

    Benavides, Carlos

    2015-01-01

    The present study examined the use and effectiveness of a large corpus--the Corpus del Español (Davies, 2002)--in a 300-level Spanish grammar university course. Students conducted hands-on corpus searches with the goal of finding concordances containing particular types of collocations (combinations of words that tend to co-occur) and tokens (any…

  3. Characterization of a 300-GHz Transmission System for Digital Communications

    NASA Astrophysics Data System (ADS)

    Hudlička, Martin; Salhi, Mohammed; Kleine-Ostmann, Thomas; Schrader, Thorsten

    2017-08-01

    The paper presents the characterization of a 300-GHz transmission system for modern digital communications. The quality of the modulated signal at the output of the system (error vector magnitude, EVM) is measured using a vector signal analyzer. A method using a digital real-time oscilloscope and consecutive mathematical processing in a computer is shown for analysis of signals with bandwidths exceeding that of state-of-the-art vector signal analyzers. The uncertainty of EVM measured using the real-time oscilloscope is open to analysis. Behaviour of the 300-GHz transmission system is studied with respect to various modulation schemes and different signal symbol rates.

  4. Developing a 300C Analog Tool for EGS

    SciTech Connect

    Normann, Randy

    2015-03-23

    This paper covers the development of a 300°C geothermal well monitoring tool for supporting future EGS (enhanced geothermal systems) power production. This is the first of 3 tools planed. This is an analog tool designed for monitoring well pressure and temperature. There is discussion on 3 different circuit topologies and the development of the supporting surface electronics and software. There is information on testing electronic circuits and component. One of the major components is the cable used to connect the analog tool to the surface.

  5. Proceedings of Propulsion and Energetics Panel Symposium (71st) on Engine Condition Monitoring - Technology and Experience Held in Quebec City, Canada on 30 May-3 Jun 1988

    DTIC Science & Technology

    1988-06-03

    S. This is 23.0030 US S per aircraft and year. A310/A300-600 Engine Condition Monitorig U 45000 a 4 37A 4a 4. - -n 2500 1.0 a F ig. 3 COSTS/SAVINGS...to correct for variations in the background caused by disturbances such as vapor clouds in the field of view creating scattering or obscuration...in the signal characteristics. Fine debris tends to travel with the airstream in a cloud , and larger flakes and particles become more dispersed because

  6. A 310-bp minimal promoter mediates smooth muscle cell-specific expression of telokin.

    PubMed

    Smith, A F; Bigsby, R M; Word, R A; Herring, B P

    1998-05-01

    A cell-specific promoter located in an intron of the smooth muscle myosin light chain kinase gene directs transcription of telokin exclusively in smooth muscle cells. Transgenic mice were generated in which a 310-bp rabbit telokin promoter fragment, extending from -163 to +147, was used to drive expression of simian virus 40 large T antigen. Smooth muscle-specific expression of the T-antigen transgene paralleled that of the endogenous telokin gene in all smooth muscle tissues except uterus. The 310-bp promoter fragment resulted in very low levels of transgene expression in uterus; in contrast, a transgene driven by a 2.4-kb fragment (-2250 to +147) resulted in high levels of transgene expression in uterine smooth muscle. Telokin expression levels correlate with the estrogen status of human myometrial tissues, suggesting that deletion of an estrogen response element (ERE) may account for the low levels of transgene expression driven by the 310-bp rabbit telokin promoter in uterine smooth muscle. Experiments in A10 smooth muscle cells directly showed that reporter gene expression driven by the 2.4-kb, but not 310-bp, promoter fragment could be stimulated two- to threefold by estrogen. This stimulation was mediated through an ERE located between -1447 and -1474. Addition of the ERE to the 310-bp fragment restored estrogen responsiveness in A10 cells. These data demonstrate that in addition to a minimal 310-bp proximal promoter at least one distal cis-acting regulatory element is required for telokin expression in uterine smooth muscle. The distal element may include an ERE between -1447 and -1474.

  7. Development of a 300 L Calibration Bath for Oceanographic Thermometers

    NASA Astrophysics Data System (ADS)

    Baba, S.; Yamazawa, K.; Nakano, T.; Saito, I.; Tamba, J.; Wakimoto, T.; Katoh, K.

    2017-11-01

    The Japan Agency for Marine-Earth Science and Technology (JAMSTEC) has been developing a 300 L calibration bath to calibrate 24 oceanographic thermometers (OT) simultaneously and thereby reduce the calibration work load necessary to service more than 180 OT every year. This study investigated characteristics of the developed 300 L calibration bath using a SBE 3plus thermometer produced by an OT manufacturer. We also used 11 thermistor thermometers that were calibrated to be traceable to the international temperature scale of 1990 (ITS-90) within 1 mK of standard uncertainty through collaboration of JAMSTEC and NMIJ/AIST. Results show that the time stability of temperature of the developed bath was within ± 1 mK. Furthermore, the temperature uniformity was ± 1.3 mK. The expanded uncertainty (k=2) components for the characteristics of the developed 300 L calibration bath were estimated as 2.9 mK, which is much less than the value of 10 mK: the required specification for uncertainty of calibration for the OT. These results demonstrated the utility of this 300 L calibration bath as a device for use with a new calibration system.

  8. 78 FR 79333 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-30

    ...We propose to supersede airworthiness directive (AD) 2000-12- 12, for certain Airbus Model A300, A300-600, and A310 series airplanes. AD 2000-12-12 currently requires inspecting to detect cracks in the lower spar axis of the nacelle pylon between ribs 9 and 10, and repair if necessary. AD 2000-12-12 also provides for optional modification of the pylon, which terminates the inspections for Model A300 series airplanes. Since we issued AD 2000-12-12, we have received reports of cracking of the lower pylon spar after accomplishing the existing modification and have determined that shorter initial and repetitive inspection compliance times are necessary to address the identified unsafe condition. This proposed AD would reduce the initial and repetitive inspection compliance times. We are proposing this AD to detect and correct fatigue cracking, which could result in reduced structural integrity of the lower spar of the nacelle pylon.

  9. Airbus windshear warning and guidance system

    NASA Technical Reports Server (NTRS)

    Bonafe, J. L.

    1990-01-01

    From its first designed airplane, Airbus considered mandatory a help in the crew's decision-making process to initiate an escape maneuver and help to successfully realize it. All the Airbus airplanes designed since 1975 included an alpha-floor function and a speed reference control law imbedded in the speed reference system (SRS) box for A 300 and FAC and FCC for A 310, A300/600 and the A 320. Alpha-Floor function takes into account the airplane energy situation considering angle of attack and observed longitudinal situation in order to apply immediately the full power without any pilot action. Speed reference managers control airspeed and/or ground speed in order to survive a maximum in shear situation. In order to comply with the new FAA regulation: Aerospatiale and Airbus developed more efficient systems. A comparison between 1975 and a newly developed system is given. It is explained how the new system improves the situation.

  10. [Organizational problems of disaster victim identification in mass casualties as exemplified by Tu 154-M and Airbus A310 passenger plane crashes].

    PubMed

    Volkov, A V; Kolkutin, V V; Klevno, V A; Shkol'nikov, B V; Kornienko, I V

    2008-01-01

    Managerial experience is described that was gained during the large-scale work on victim identification following mass casualties in the Tu 154-M and Airbus A310 passenger plane crashes. The authors emphasize the necessity to set up a specialized agency of constant readiness meeting modern requirements for the implementation of a system of measures for personality identification. This agency must incorporate relevant departments of the Ministries of Health, Defense, and Emergency Situations as well as investigative authorities and other organizations.

  11. THREE STAGE COMBUSTION (REBURNING) TEST RESULTS FROM A 300 MW BOILER IN THE UKRAINE

    EPA Science Inventory

    The paper gives results of a program to design, install, and test a natural gas three-stage combustion (reburn) system on a 300-MWe, opposed-wall, wetbottom (slagging) coal-fired utility boiler operating in the Ukraine. The U. S. EPA sponsored this-program in support of a working...

  12. Ceramic composite protection for turbine disc bursts. [for the A-300 aircraft

    NASA Technical Reports Server (NTRS)

    Gardner, P. B.

    1977-01-01

    Ceramic composite turbine disc protection panels for the A300B were developed using armor technology. Analytical predictions for modifying the ballistic projectile armor system were verified by a test program conducted to qualify the rotor containment system. With only a slight change in the areal density of the armor system a more than two-fold increase in kinetic energy protection level was achieved. Thickness of the fiberglass reinforced plastic backing material was increased to achieve an optimum ratio of ceramic thickness to backing thickness for the different ballistic defeat condition.

  13. The interfaces between flightcrews and modern flight deck systems

    DOT National Transportation Integrated Search

    1996-06-18

    On April 26, 1994, an Airbus A300-600 operated by China Airlines crashed at Nagoya, Japan, killing 264 passengers and flightcrew members. Contributing to the accident were conflicting actions taken by the flightcrew and the airplane's autopilot. The ...

  14. Design and realization of a 300 W fuel cell generator on an electric bicycle

    NASA Astrophysics Data System (ADS)

    Cardinali, Luciano; Santomassimo, Saverio; Stefanoni, Marco

    At ENEA Casaccia Research Center (Rome, Italy) a 300 W NUVERA fuel cell stack has been utilized for the construction of a range extender generator on a commercial electric bicycle. The generator is fully automated with a programmable logic controller (PLC) safely operating start-up, shut-down and emergencies; a volumetric compressor supplies air to the cathode, a dc/dc converter transfers energy from the stack to the battery. All ancillary equipment are commercial; only the cell voltage sensors have been developed in order to obtain miniaturized and low consumption components. With this generator the bicycle nominal range of 25 km (utilizing only the Ni-Mh battery) is extended to over 120 km, by installing a 200 bar, 5 l bottle of hydrogen.

  15. Study of Gas Solid Flow Characteristics in Cyclone Inlet Ducts of A300Mwe CFB Boiler

    NASA Astrophysics Data System (ADS)

    Tang, J. Y.; Lu, X. F.; Lai, J.; Liu, H. Z.

    Gas solid flow characteristics in cyclone's inlet duct of a 300MW CFB boiler were studied in a cold circulating fluidized bed (CFB) experimental setup according to a 410t/h CFB boiler with a scale of 10∶1. Tracer particles were adopted in the experiment and their motion trajectories in the two kinds of cyclone's inlet ducts were photographed by a high-speed camera. By analyzing the motion trajectories of tracer particles, acceleration performance of particle phases in the two inlet ducts was obtained. Results indicate that the acceleration performance of particles in the long inlet duct is better than that in the short inlet duct, but the pressure drop of the long inlet duct is higher. Meanwhile, under the same operating conditions, both the separation efficiency and the pressure drop of the cyclone are higher when the cyclone is connected with the long inlet duct. Figs 11, Tabs 4 and refs 10.

  16. 75 FR 60611 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-01

    ... Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model A300 C4...; Model A300 B4-601, B4- 603, B4-620, B4-622, B4-605R, B4-622R, F4-605R, F4-622R, and C4-605R Variant F...-- Dated-- A300 series airplanes......... A300-32A0447..... April 22, 2004. A300 B4-600, B4-600R, and F4...

  17. Leishmania tarentolae molecular signatures in a 300 hundred-years-old human Brazilian mummy.

    PubMed

    Novo, Shênia P C; Leles, Daniela; Bianucci, Raffaella; Araujo, Adauto

    2015-02-04

    L. tarentolae, the lizard-infecting species of Old World geckos, has been classified as non-pathogenic to man. While it has been demonstrated that L. tarentolae is capable of infecting human phagocytic cells and to differentiate into amastigote-like forms, there is no clear evidence for its efficient replication within macrophages. Here we provide first evidence for L. tarentolae ancient DNA sequences from bone marrow and intestines of a 300yo adult male. We identified molecular signatures of Leishmania tarentolae, the lizard-infecting species of Old World geckos, in hard and soft tissue biopsies from a Brazilian mummy (A74) uncovered in Itacambira (Brazil) and dating to the Colonial Period (end of 18th/beginning of the 19th century). Our results imply that efficient replication of the parasite occurred within human macrophage and to lead to a systemic spread and visceralization in this individual. The ancient sequences show a 100% similarity with those of isolated L. tarentolae parasites grown on artificial nutrient media and a 99% similarity with two modern sequences isolated from reptiles. De facto, our findings re-open the debate about the potential survival of ancient L. tarentolae strain within human macrophage and its ability to spread systemically. They also raise ecological issues since it is unknown whether this parasite circulates in the reptilian reservoir in modern day Brazil or not. Investigations on fossil fauna and arthropods are needed to shed light on the interactions between saurian Leishmania and lizards in Brazil's remote and recent past.

  18. Development of a 300 Amp-hr high rate lithium thionyl chloride cell

    NASA Technical Reports Server (NTRS)

    Boyle, Gerard H.

    1991-01-01

    The development of a high-rate lithium thionyl chloride cylindrical cell with parallel plate electrodes is discussed. The development was divided into three phases: phase 1, a 150 Amp/hour low rate (1 mA/sq cm) design; phase 2, a 25 Amp/hour high rate (5 mA/sq cm) design; and phase 3, a 300 Amp/hour high rate (5 mA/sq cm) design. The basic design is the same for all three cells. The electrodes are perpendicular to the axis of the cylinder. Multiple electrodes are bussed up the side of the cylinder, 180 deg apart allowing excellent anode and cathode utilization. It is a lithium limited design with excess electrolyte. The cathode is Shawinigan or Gulf Acetylene black with no catalyst. The electrolyte is 1.8 Molar lithium tetrachloroaluminate (LiAlCl4) in thionyl chloride. All cell cases are 304L Stainless Steel with a BS&B burst disc.

  19. 75 FR 76926 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-10

    ... Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R... airplanes; Model A300 B4-605R and B4-622R airplanes; Model A300 F4-605R and F4-622R airplanes; Model A300 C4...

  20. East African Soil Erosion Recorded in a 300 Year old Coral Colony From Kenya

    NASA Astrophysics Data System (ADS)

    Dunbar, R. B.; Fleitmann, D.; McCulloch, M.; Mudelsee, M.; Vuille, M.; McClanahan, T.; Cole, J.; Eggins, S.

    2006-12-01

    Soil erosion threatens the food security of 2.6 billion people worldwide. The situation is particularly dire in East and Sub-Saharan Africa where per capita food production has declined over the past 45 years. Erosion and the resultant loss of fertile soil is a key socio-economic and ecological problem in Kenya, affecting all sectors of its economy and damaging marine and terrestrial ecosystems. The temporal pattern of soil erosion is almost unknown and currently only sparse and rather anecdotal information exists. To aid in filling this gap of knowledge, we present a 300-year long Barium record from two Kenyan coral colonies (Porites sp., 3°15'S, 40°9' E; Malindi Marine National Park) that documents a dynamic history of soil erosion in the Sabaki river drainage basin. To reconstruct Sabaki River sediment flux to the Malindi coral reef Ba/Ca ratios were measured in the skeleton of two Porites colonies (Mal 96-1 and Mal 95-3). Well-developed annual bands allow us to develop annually precise chronologies. Ba/Ca ratios were measured in core Mal 96-1 at continuous 40 μm intervals (~400 to 500 samples yr-1) using laser-ablation inductively coupled plasma mass spectrometry (LA- ICP-MS). To test for reproducibility and accuracy of the Mal 96-1 Ba/Ca profile, coral core Mal 95-3 was analyzed at lower resolution (1 to 12 samples yr-1) using discrete micro-drill sampling and isotope dilution ICP-MS. The close similarity between both coral Ba/Ca profiles, in absolute values as well as general pattern, underscores the accuracy of the LA-ICP-MS technique and adds confidence to our interpretation of the 300 year long Mal 96-1 Ba/Ca profile. The Ba/Ca coral proxy record shows that while the sediment flux from the Sabaki River is nearly constant between 1700 and 1900, a continuous rise in sediment flux is observed since 1900, reflecting steadily increasing demographic pressure on land use. The peak in suspended sediment load and hence soil erosion recorded at the Malindi reef

  1. 78 FR 9787 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-12

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300- 600 series airplanes); and Airbus [[Page 9788

  2. Physiological and technical commitment during a 300-m in-line skating trial in athletes of different age categories.

    PubMed

    Invernizzi, Pietro L; Scurati, Raffaele; Crotti, Matteo; Bosio, Andrea; Longo, Stefano; Esposito, Fabio

    2018-01-04

    This study investigated the differences in strength, technique and time performance in in-line skaters of three age categories during a 300 m trial. Possible correlations among these variables were also assessed. Thirty-six elite in-line skaters (Cadets, Juniors and Seniors, n=12 each; 14±1, 16±1, and 24±6 years of age, respectively) performed a 300-m trial on an outdoor oval track. Total time (Ttot), 100-m fractions and duration of each skating technique (initial acceleration phase, straight push and cross-over) were recorded. A squat jump (SJ) was performed before and after the trial. Heart rate, blood lactate concentration ([La-]) and rate of perceived exertion (RPE) were collected before, during and at the end of the trial. Ttot was longer and SJ lower in Cadets compared to the other groups. Seniors employed the cross-over technique for a longer period than the straight push technique, compared to Juniors and Cadets. Ttot correlated negatively with SJ in Seniors. The number of significant correlations between skating techniques' duration and both Ttot and SJ increased with age category. No differences among groups were found for heart rate, [La-] and RPE. With increasing age category, leg strength appeared to be the more related aspect to skating performance. To improve 300-m in-line skating performance, trainers should pay particular attention to the enhancement of leg strength and cross-over skating technique.

  3. Feasible experimental study on the utilization of a 300 MW CFB boiler desulfurizating bottom ash for construction applications

    SciTech Connect

    Lu, X.F.; Amano, R.S.

    2006-12-15

    CFB boiler ash cannot be used as a cement replacement in concrete due to its unacceptably high sulfur content. The disposal in landfills has been the most common means of handling ash in circulating fluidized bed boiler power plants. However for a 300 MW CFB boiler power plant, there will be 600,000 tons of ash discharged per year and will result in great volumes and disposal cost of ash byproduct. It was very necessary to solve the utilization of CFB ash and to decrease the disposal cost of CFB ash. The feasible experimental study results on the utilization of themore » bottom ashes of a 300 MW CFB boiler in Baima power plant in China were reported in this paper. The bottom ashes used for test came from the discharged bottom ashes in a 100 MW CFB boiler in which the anthracite and limestone designed for the 300 MW CFB project was burned. The results of this study showed that the bottom ash could be used for cementitious material, road concrete, and road base material. The masonry cements, road concrete with 30 MPa compressive strength and 4.0 MPa flexural strength, and the road base material used for base courses of the expressway, the main road and the minor lane were all prepared with milled CFB bottom ashes in the lab. The better methods of utilization of the bottom ashes were discussed in this paper.« less

  4. Beam property measurement of a 300-kV ion source test stand for a 1-MV electrostatic accelerator

    NASA Astrophysics Data System (ADS)

    Park, Sae-Hoon; Kim, Dae-Il; Kim, Yu-Seok

    2016-09-01

    The KOMAC (Korea Multi-purpose Accelerator Complex) has been developing a 300-kV ion source test stand for a 1-MV electrostatic accelerator for industrial purposes. A RF ion source was operated at 200 MHz with its matching circuit. The beam profile and emittance were measured behind an accelerating column to confirm the beam property from the RF ion source. The beam profile was measured at the end of the accelerating tube and at the beam dump by using a beam profile monitor (BPM) and wire scanner. An Allison-type emittance scanner was installed behind the beam profile monitor (BPM) to measure the beam density in phase space. The measurement results for the beam profile and emittance are presented in this paper.

  5. Least Square Fast Learning Network for modeling the combustion efficiency of a 300WM coal-fired boiler.

    PubMed

    Li, Guoqiang; Niu, Peifeng; Wang, Huaibao; Liu, Yongchao

    2014-03-01

    This paper presents a novel artificial neural network with a very fast learning speed, all of whose weights and biases are determined by the twice Least Square method, so it is called Least Square Fast Learning Network (LSFLN). In addition, there is another difference from conventional neural networks, which is that the output neurons of LSFLN not only receive the information from the hidden layer neurons, but also receive the external information itself directly from the input neurons. In order to test the validity of LSFLN, it is applied to 6 classical regression applications, and also employed to build the functional relation between the combustion efficiency and operating parameters of a 300WM coal-fired boiler. Experimental results show that, compared with other methods, LSFLN with very less hidden neurons could achieve much better regression precision and generalization ability at a much faster learning speed. Copyright © 2013 Elsevier Ltd. All rights reserved.

  6. pH Dependence of a 310-Helix versus a Turn in the M-Loop Region of PDE4: Observations on PDB Entries and an Electronic Structure Study.

    PubMed

    Usharani, Dandamudi; Srivani, Palakuri; Sastry, G Narahari; Jemmis, Eluvathingal D

    2008-06-01

    Available X-ray crystal structures of phosphodiesterase 4 (PDE 4) are classified into two groups based on a secondary structure difference of a 310-helix versus a turn in the M-loop region. The only variable that was discernible between these two sets is the pH at the crystallization conditions. Assuming that at lower pH there is a possibility of protonation, thermodynamics of protonation and deprotonation of the aspartic acid, cysteine side chains, and amide bonds are calculated. The models in the gas phase and in the explicit solvent using the ONIOM method are calculated at the B3LYP/6-31+G* and B3LYP/6-31+G*:UFF levels of theory, respectively. The molecular dynamics (MD) simulations are also performed on the M-loop region of a 310-helix and a turn with explicit water for 10 ns under NPT conditions. The isodesmic equations of the various protonation states show that the turn containing structure is thermodynamically more stable when proline or cysteine is protonated. The preference for the turn structure on protonation (pH = 6.5-7.5) is due to an increase in the number of the hydrogen bonding and electrostatic interactions gained by the surrounding environment such as adjacent residues and solvent molecules.

  7. A practical optical-resolution photoacoustic microscopy prototype using a 300 mW visible laser diode

    NASA Astrophysics Data System (ADS)

    Zeng, Lvming; Piao, Zhonglie; Huang, Shenghai; Jia, Wangcun; Chen, Zhongping

    2016-03-01

    Optical-resolution photoacoustic microscopy (OR-PAM) is an emerging technique for microvasculature imaging at high spatial resolution and contrast. In this work, we present a practical visible laser-diode-based OR-PAM (LD-OR-PAM) prototype for vasculature imaging, which has the desirable properties of being portable, low-cost, and label-free. The prototype employs a 300 mW pulsed laser diode in a 3.8 mm diameter package, emitting 174 ns pulses at 405 +/- 5 nm wavelength and a pulse energy of 52 nJ. An aspheric objective with a numerical aperture of 0.60 is used to achieve microscope optical illumination. The laser diode excitation has a compact size of 4.5 × 1.8 × 1.8 cm3 assembled with a cooling block. The lateral resolution was tested to be 0.95 μm on ~7 μm carbon fibers. The subcutaneous microvasculature on a mouse back was label-free imaged ex vivo, which demonstrates the potential of the LD-OR-PAM prototype for in vivo imaging skin chromosphores such as hemoglobin. Our ultimate aim is to provide a practical and affordable OR-PAM system as a routine instrument for standard clinical applications.

  8. Evidence of Influence of Human Activities and Volcanic Eruptions on Environmental Perchlorate from a 300-Year Greenland Ice Core Record.

    PubMed

    Cole-Dai, Jihong; Peterson, Kari Marie; Kennedy, Joshua Andrew; Cox, Thomas S; Ferris, David G

    2018-06-26

    A 300-year (1700-2007) chronological record of environmental perchlorate, reconstructed from high-resolution analysis of a central Greenland ice core, shows that perchlorate levels in the post-1980 atmosphere were two-to-three times those of the pre-1980 environment. While this confirms recent reports of increased perchlorate in Arctic snow since 1980 compared with the levels for the prior decades (1930-1980), the longer Greenland record demonstrates that the Industrial Revolution and other human activities, which emitted large quantities of pollutants and contaminants, did not significantly impact environmental perchlorate, as perchlorate levels remained stable throughout the eighteenth, nineteenth, and much of the twentieth centuries. The increased levels since 1980 likely result from enhanced atmospheric perchlorate production, rather than from direct release from perchlorate manufacturing and applications. The enhancement is probably influenced by the emission of organic chlorine compounds in the last several decades. Prior to 1980, no significant long-term temporal trends in perchlorate concentration are observed. Brief (a few years) high concentration episodes appear frequently over an apparently stable and low background (~1 ng kg‒1). Several such episodes coincide in time with large explosive volcanic eruptions including the 1912 Novarupta/Katmai eruption in Alaska. It appears that atmospheric perchlorate production is impacted by large eruptions in both high and low latitudes, but not by small eruptions and non-explosive degassing.

  9. Design of a 300-kV gas environmental transmission electron microscope equipped with a cold field emission gun.

    PubMed

    Isakozawa, Shigeto; Nagaoki, Isao; Watabe, Akira; Nagakubo, Yasuhira; Saito, Nobuhiro; Matsumoto, Hiroaki; Zhang, Xiao Feng; Taniguchi, Yoshifumi; Baba, Norio

    2016-08-01

    A new in situ environmental transmission electron microscope (ETEM) was developed based on a 300 kV TEM with a cold field emission gun (CFEG). Particular caution was taken in the ETEM design to assure uncompromised imaging and analytical performance of the TEM. Because of the improved pumping system between the gun and column, the vacuum of CFEG was largely improved and the probe current was sufficiently stabilized to operate without tip flashing for 2-3 h or longer. A high brightness of 2.5 × 10(9) A/cm(2) sr was measured at 300 kV, verifying the high quality of the CFEG electron beam. A specially designed gas injection-heating holder was used in the in situ TEM study at elevated temperatures with or without gas around the TEM specimen. Using this holder in a 10 Pa gas atmosphere and specimen temperatures up to 1000°C, high-resolution ETEM performance and analysis were achieved. © The Author 2016. Published by Oxford University Press on behalf of The Japanese Society of Microscopy. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  10. "WhatsApp"ening in orthopedic care: a concise report from a 300-bedded tertiary care teaching center.

    PubMed

    Khanna, Vishesh; Sambandam, Senthil N; Gul, Arif; Mounasamy, Varatharaj

    2015-07-01

    Smartphones have emerged as essential tools providing assistance in patient care, monitoring, rehabilitation, communication, diagnosis, teaching, research and reference. Among innumerable communication apps, WhatsApp has been widely popular and cost effective. The aim of our study was to report the impact of introduction of a smartphone app "WhatsApp" as an intradepartmental communication tool on (1) awareness of patient-related information, (2) efficiency of the handover process and (3) duration of traditional morning handovers among orthopedic residents in a 300-bedded tertiary care teaching center. Written handovers and paging used for communication at our center led to occasional inefficiencies among residents. Widespread use, low cost, availability and double password protection (phone lock and WhatsApp lock) made WhatsApp's group conversation feature an ideal tool for intradepartmental patient-related communication. Twenty-five consecutive admissions before and after WhatsApp (BW, AW) were included in the study. Eight orthopedic residents attempted fifty randomly arranged questions based on the twenty-five patients in each study period. A null hypothesis that introduction of WhatsApp group would neither increase the awareness of patient-related information nor improve the efficiency of the handovers among residents was assumed. A significant improvement observed in scores obtained by residents in the AW group led to rejection of the null hypothesis. The residents also reported swifter and efficient handovers after the introduction of WhatsApp. Our results indicate that the introduction of a smartphone app "WhatsApp" as an intradepartmental communication tool can bring about an improvement in patient-related awareness, communication and handovers among orthopedic residents.

  11. 76 FR 441 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-05

    ... Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R...-622, B4-605R, B4-622R, F4-605R, F4-622R, and C4-605R Variant F airplanes, certificated in any category...

  12. 75 FR 27956 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-19

    ... B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively...-203, and B4-203 airplanes; Model A300 B4-601, B4- 603, B4-620, B4-622, B4-605R, B4-622R, F4-605R, F4...

  13. 77 FR 24367 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-24

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... Airbus Model A300 B4-2C, B4-103, and B4-203 airplanes; Model A300 B4- 600, B4-600R, and F4-600R series airplanes, and Model C4-605R Variant F airplanes (collectively called A300-600 series airplanes); and Model...

  14. 15 CFR 8a.300 - Admission.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... discriminate against or exclude any person on the basis of pregnancy, childbirth, termination of pregnancy, or...) Subject to § 8a.235(d), shall treat disabilities related to pregnancy, childbirth, termination of pregnancy, or recovery therefrom in the same manner and under the same policies as any other temporary...

  15. 15 CFR 8a.300 - Admission.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... discriminate against or exclude any person on the basis of pregnancy, childbirth, termination of pregnancy, or...) Subject to § 8a.235(d), shall treat disabilities related to pregnancy, childbirth, termination of pregnancy, or recovery therefrom in the same manner and under the same policies as any other temporary...

  16. 15 CFR 8a.300 - Admission.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... discriminate against or exclude any person on the basis of pregnancy, childbirth, termination of pregnancy, or...) Subject to § 8a.235(d), shall treat disabilities related to pregnancy, childbirth, termination of...

  17. 15 CFR 8a.300 - Admission.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... discriminate against or exclude any person on the basis of pregnancy, childbirth, termination of pregnancy, or...) Subject to § 8a.235(d), shall treat disabilities related to pregnancy, childbirth, termination of...

  18. 15 CFR 8a.300 - Admission.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... discriminate against or exclude any person on the basis of pregnancy, childbirth, termination of pregnancy, or...) Subject to § 8a.235(d), shall treat disabilities related to pregnancy, childbirth, termination of...

  19. 76 FR 63177 - Airworthiness Directives; Airbus Model A300 B2-1C, A300 B2-203, A300 B2K-3C, A300-B4-103, A300 B4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-12

    ... available in the AD docket shortly after receipt. List of Subjects in 14 CFR Part 39 Air transportation... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2011... B4-2C Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT...

  20. 76 FR 26962 - Airworthiness Directives; Airbus Model A300 B2-1C, A300 B2-203, A300 B2K-3C, A300-B4-103, A300 B4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-10

    ... repetitive detailed inspections for disbonding and cracking of the fuselage inner doubler; eddy current and... detailed inspections for disbonding and cracking of the fuselage inner doubler; eddy current and ultrasonic... or Modification if Necessary (g) For airplanes on which an eddy current inspection of the ``special...

  1. 76 FR 6549 - Airworthiness Directives; Airbus Model A300 B4-600 and A300 B4-600R Series Airplanes, Model A300...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-07

    ... similar to the Airworthiness Limitations Items (ALI) Tasks 53.16.04-01-1 and 53.16.22- 01-1. We do not... determined that accomplishing the actions required by this AD terminates ALI Tasks 53.16.04-01-1 and 53.16.22... of this AD terminates ALI Tasks 53.16.04-01-1 and 53.16.22-01-1. We have reidentified subsequent...

  2. 75 FR 51705 - Airworthiness Directives; Airbus Model A300 B4-600 and A300 B4-600R Series Airplanes, Model A300...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-23

    ... FR (frame) 58 is necessary to enable the aeroplane to reach the Extended Service Goal (ESG). The... may send comments by any of the following methods: Federal eRulemaking Portal: Go to http://www... reinforcement of the upper fuselage circumferential joint at FR (frame) 58 is necessary to enable the aeroplane...

  3. Stars Just Got Bigger - A 300 Solar Mass Star Uncovered

    NASA Astrophysics Data System (ADS)

    2010-07-01

    Using a combination of instruments on ESO's Very Large Telescope, astronomers have discovered the most massive stars to date, one weighing at birth more than 300 times the mass of the Sun, or twice as much as the currently accepted limit of 150 solar masses. The existence of these monsters - millions of times more luminous than the Sun, losing weight through very powerful winds - may provide an answer to the question "how massive can stars be?" A team of astronomers led by Paul Crowther, Professor of Astrophysics at the University of Sheffield, has used ESO's Very Large Telescope (VLT), as well as archival data from the NASA/ESA Hubble Space Telescope, to study two young clusters of stars, NGC 3603 and RMC 136a in detail. NGC 3603 is a cosmic factory where stars form frantically from the nebula's extended clouds of gas and dust, located 22 000 light-years away from the Sun (eso1005). RMC 136a (more often known as R136) is another cluster of young, massive and hot stars, which is located inside the Tarantula Nebula, in one of our neighbouring galaxies, the Large Magellanic Cloud, 165 000 light-years away (eso0613). The team found several stars with surface temperatures over 40 000 degrees, more than seven times hotter than our Sun, and a few tens of times larger and several million times brighter. Comparisons with models imply that several of these stars were born with masses in excess of 150 solar masses. The star R136a1, found in the R136 cluster, is the most massive star ever found, with a current mass of about 265 solar masses and with a birthweight of as much as 320 times that of the Sun. In NGC 3603, the astronomers could also directly measure the masses of two stars that belong to a double star system [1], as a validation of the models used. The stars A1, B and C in this cluster have estimated masses at birth above or close to 150 solar masses. Very massive stars produce very powerful outflows. "Unlike humans, these stars are born heavy and lose weight as they age," says Paul Crowther. "Being a little over a million years old, the most extreme star R136a1 is already 'middle-aged' and has undergone an intense weight loss programme, shedding a fifth of its initial mass over that time, or more than fifty solar masses." If R136a1 replaced the Sun in our Solar System, it would outshine the Sun by as much as the Sun currently outshines the full Moon. "Its high mass would reduce the length of the Earth's year to three weeks, and it would bathe the Earth in incredibly intense ultraviolet radiation, rendering life on our planet impossible," says Raphael Hirschi from Keele University, who belongs to the team. These super heavyweight stars are extremely rare, forming solely within the densest star clusters. Distinguishing the individual stars - which has now been achieved for the first time - requires the exquisite resolving power of the VLT's infrared instruments [2]. The team also estimated the maximum possible mass for the stars within these clusters and the relative number of the most massive ones. "The smallest stars are limited to more than about eighty times more than Jupiter, below which they are 'failed stars' or brown dwarfs," says team member Olivier Schnurr from the Astrophysikalisches Institut Potsdam. "Our new finding supports the previous view that there is also an upper limit to how big stars can get, although it raises the limit by a factor of two, to about 300 solar masses." Within R136, only four stars weighed more than 150 solar masses at birth, yet they account for nearly half of the wind and radiation power of the entire cluster, comprising approximately 100 000 stars in total. R136a1 alone energises its surroundings by more than a factor of fifty compared to the Orion Nebula cluster, the closest region of massive star formation to Earth. Understanding how high mass stars form is puzzling enough, due to their very short lives and powerful winds, so that the identification of such extreme cases as R136a1 raises the challenge to theorists still further. "Either they were born so big or smaller stars merged together to produce them," explains Crowther. Stars between about 8 and 150 solar masses explode at the end of their short lives as supernovae, leaving behind exotic remnants, either neutron stars or black holes. Having now established the existence of stars weighing between 150 and 300 solar masses, the astronomers' findings raise the prospect of the existence of exceptionally bright, "pair instability supernovae" that completely blow themselves apart, failing to leave behind any remnant and dispersing up to ten solar masses of iron into their surroundings. A few candidates for such explosions have already been proposed in recent years. Not only is R136a1 the most massive star ever found, but it also has the highest luminosity too, close to 10 million times greater than the Sun. "Owing to the rarity of these monsters, I think it is unlikely that this new record will be broken any time soon," concludes Crowther. Notes [1] The star A1 in NGC 3603 is a double star, with an orbital period of 3.77 days. The two stars in the system have, respectively, 120 and 92 times the mass of the Sun, which means that they have formed as stars weighing, respectively, 148 and 106 solar masses. [2] The team used the SINFONI, ISAAC and MAD instruments, all attached to ESO's Very Large Telescope at Paranal, Chile. [3] (note added on 26 July 2010) The "bigger" in the title does not imply that these stars are the biggest observed. Such stars, called red supergiants, can have radii up to about a thousand solar radii, while R136a1, which is blue, is about 35 times as large as the Sun. However, R136a1 is the star with the greatest mass known to date. More information This work is presented in an article published in the Monthly Notices of the Royal Astronomical Society ("The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit", by P. Crowther et al.). The team is composed of Paul A. Crowther, Richard J. Parker, and Simon P. Goodwin (University of Sheffield, UK), Olivier Schnurr (University of Sheffield and Astrophysikalisches Institut Potsdam, Germany), Raphael Hirschi (Keele University, UK), and Norhasliza Yusof and Hasan Abu Kassim (University of Malaya, Malaysia). ESO, the European Southern Observatory, is the foremost intergovernmental astronomy organisation in Europe and the world's most productive astronomical observatory. It is supported by 14 countries: Austria, Belgium, the Czech Republic, Denmark, France, Finland, Germany, Italy, the Netherlands, Portugal, Spain, Sweden, Switzerland and the United Kingdom. ESO carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities enabling astronomers to make important scientific discoveries. ESO also plays a leading role in promoting and organising cooperation in astronomical research. ESO operates three unique world-class observing sites in Chile: La Silla, Paranal and Chajnantor. At Paranal, ESO operates the Very Large Telescope, the world's most advanced visible-light astronomical observatory and VISTA, the world's largest survey telescope. ESO is the European partner of a revolutionary astronomical telescope ALMA, the largest astronomical project in existence. ESO is currently planning a 42-metre European Extremely Large optical/near-infrared Telescope, the E-ELT, which will become "the world's biggest eye on the sky".

  4. Ageing airplane repair assessment program for Airbus A300

    NASA Technical Reports Server (NTRS)

    Gaillardon, J. M.; Schmidt, HANS-J.; Brandecker, B.

    1992-01-01

    This paper describes the current status of the repair categorization activities and includes all details about the methodologies developed for determination of the inspection program for the skin on pressurized fuselages. For inspection threshold determination two methods are defined based on fatigue life approach, a simplified and detailed method. The detailed method considers 15 different parameters to assess the influences of material, geometry, size location, aircraft usage, and workmanship on the fatigue life of the repair and the original structure. For definition of the inspection intervals a general method is developed which applies to all concerned repairs. For this the initial flaw concept is used by considering 6 parameters and the detectable flaw sizes depending on proposed nondestructive inspection methods. An alternative method is provided for small repairs allowing visual inspection with shorter intervals.

  5. Clinical experience of PDT in Brazil: a 300 patient overview

    NASA Astrophysics Data System (ADS)

    Kurachi, Cristina; Ferreira, Juliana; Marcassa, Luis G.; Cestari Filho, Guilherme A.; Souza, Cacilda S.; Bagnato, Vanderlei S.

    2005-04-01

    Clinical application of Photodynamic Therapy (PDT) in Brazil is a result of a pioneering work in a collaborative program involving the Physics Institute and the Medical School of the University of Sao Paulo and the Amaral Carvalho Cancer Hospital in the city of Jau, Sao Paulo. This work began in 1997 with the first patient treated in 1999. Up to the end of 2003 this program has treated over 300 patients and the ones with correct follow up had their lesions included in this report. The majority of the lesions were of non-melanoma skin cancer located on the head and neck region, but the group has also treated Esophagus, Bladder, Gynecological, chest wall recurrence of breast cancer, among others. The results have shown to be compatible with internationally reported data, and we have modified some application procedures towards to a better benefit for the patient and an optimization of the results. We present the overall results observed after 5 year of experimental clinical treatment.

  6. Studies on a 300 k pixel detector telescope

    NASA Astrophysics Data System (ADS)

    Middelkamp, Peter; Antinori, F.; Barberis, D.; Becks, K. H.; Beker, H.; Beusch, W.; Burger, P.; Campbell, M.; Cantatore, E.; Catanesi, M. G.; Chesi, E.; Darbo, G.; D'Auria, S.; Davia, C.; di Bari, D.; di Liberto, S.; Elia, D.; Gys, T.; Heijne, E. H. M.; Helstrup, H.; Jacholkowski, A.; Jæger, J. J.; Jakubek, J.; Jarron, P.; Klempt, W.; Krummenacher, F.; Knudson, K.; Kralik, I.; Kubasta, J.; Lasalle, J. C.; Leitner, R.; Lemeilleur, F.; Lenti, V.; Letheren, M.; Lopez, L.; Loukas, D.; Luptak, M.; Martinengo, P.; Meddeler, G.; Meddi, F.; Morando, M.; Munns, A.; Pellegrini, F.; Pengg, F.; Pospisil, S.; Quercigh, E.; Ridky, J.; Rossi, L.; Safarik, K.; Scharfetter, L.; Segato, G.; Simone, S.; Smith, K.; Snoeys, W.; Vrba, V.

    1996-02-01

    Four silicon pixel detector planes are combined to form a tracking telescope in the lead ion experiment WA97 at CERN with 290 304 sensitive elements each of 75 μm by 500 μm area. An electronic pulse processing circuit is associated with each individual sensing element and the response for ionizing particles is binary with an adjustable threshold. The noise rate for a threshold of 6000 e- has been measured to be less than 10-10. The inefficient area due to malfunctioning pixels is 2.8% of the 120 cm2. Detector overlaps within one plane have been used to determine the alignment of the components of the plane itself, without need for track reconstruction using external detectors. It is the first time that such a big surface covered with active pixels has been used in a physics experiment. Some aspects concerning inclined particle tracks and time walk have been measured separately in a beam test at the CERN SPS H6 beam.

  7. A 300 GHz collective scattering diagnostic for low temperature plasmas.

    PubMed

    Hardin, Robert A; Scime, Earl E; Heard, John

    2008-10-01

    A compact and portable 300 GHz collective scattering diagnostic employing a homodyne detection scheme has been constructed and installed on the hot helicon experiment (HELIX). Verification of the homodyne detection scheme was accomplished with a rotating grooved aluminum wheel to Doppler shift the interaction beam. The HELIX chamber geometry and collection optics allow measurement of scattering angles ranging from 60 degrees to 90 degrees. Artificially driven ion-acoustic waves are also being investigated as a proof-of-principle test for the diagnostic system.

  8. Archaeology and Astronomy.A 300-year Voyage

    NASA Astrophysics Data System (ADS)

    Morellato, Jody

    2015-05-01

    This article will present a short introduction into my research on archaeoastronomical studies' origin and development. I deliberately focus my attention on a particular epoch: from the beginning of the 18th century to the 1970s: more precisely 1973, a special positive moment for this field, when anthropologist E.C. Baity generated the neologism of 'ethnoastronomy'. The intention is to describe briefly the romantic hypotheses of the earliest eclectic pioneers - subsequently grouped under the name of astro-archaeologists - combining summaries of the main ideas and quotations. We will be able to reconstruct a valid general overview about the topic in question and the facts - described following a natural chronological development - will guide us to the modern idea of archaeoastronomy. Through two interesting moments during the early twentieth century, but especially at the turn of the 1970s it almost seems that a dialogue may be possible. Thanks to institutions such as the British Academy or Royal Society, and the Accademia Nazionale dei Lincei, a point of convergence bringing together archaeology and astronomy will be established, as well as the promotion of an interdisciplinary research. Might the wall of separation between the arts and the sciences, at least in this field, be overcome? Are we at the threshold of a new discipline? To answer these questions we need a deeper understanding of the contemporary studies on cultural astronomy: a history that develops not only in a linear time, but also growth in complexity and tone, involving more and more scholars belonging to the main scientific and humanistic fields. I would leave this point open inviting my colleagues to join and push forward a research we all totally do need.

  9. 76 FR 39035 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-05

    ... application of a similar regulation to the National Aviation Authorities (NAA). Under this regulation, all... National Aviation Authorities (NAA). Under this regulation, all holders of type certificates for passenger... Authorities] JAA recommended the application of a similar regulation to the National Aviation Authorities (NAA...

  10. 76 FR 27232 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ... rototest inspection to detect cracks in the area of frame 47 and frame 54, install new doublers, and repair if necessary. Repetitive visual inspections to detect cracks on frame 46 between the left- and right... visual inspections to detect cracks at the T- section connecting frame 50A to the beam between the left...

  11. 76 FR 34 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ... regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments... not have a significant economic impact, positive or negative, on a substantial number of small... accumulation of 9,400 total flight cycles and 18,800 total flight hours: At the times specified in paragraph (h...

  12. 76 FR 50 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ...; or long range use, AFT exceeding 3.6 hours. Table 1--Compliance Times for Paragraph (g) of This AD... flight time (AFT) equal to or less than 3.6 hours; or long range use, AFT exceeding 3.6 hours. Table 2... or 30,300 flight hours, whichever occurs first. Configurations 06, 07, and 08 long range Detailed...

  13. 76 FR 62653 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... the fuel electrical circuit in the Right Hand (RH) wing must be modified in order to ensure better... 2S of the fuel electrical circuit in the Right Hand (RH) wing must be modified in order to ensure... the wire bundle 2S in the RH wing pylon area to the generator wire bundle of engine 2. The...

  14. 76 FR 27227 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    .... List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010...), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: We are adopting a new airworthiness...

  15. 76 FR 27220 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    .... List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010...), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: We are adopting a new airworthiness...

  16. 76 FR 65938 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-25

    ... CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2011...), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: We are adopting a new airworthiness...

  17. 76 FR 42 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ... may send comments by any of the following methods: Federal eRulemaking Portal: Go to http://www... 1992-106-132(B)R4, dated June 5, 1996]. Following the Extended Design Service Goal activities part of... inspection to detect cracks in the area of frame 47 and frame 54, install new doublers, and repair if...

  18. 78 FR 15874 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-13

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F... ground threat avoidance, an Airbus A310 aeroplane experienced an uncommanded slide back of the co-pilot...

  19. 77 FR 64701 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-23

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... Airbus Model A300 series airplanes; Model A310 series airplanes; and Model A300 B4-600, B4-600R, and F4... that the AD be effective after Airbus completes certifying the improved design for the fuel pump half...

  20. 77 FR 10409 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-22

    ...; Model A310 series airplanes; Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model C4-605R... Model A300 B4-603, B4-620, and B4-622 airplanes, Model A300 B4-605R and B4-622R airplanes, Model A300 F4-605R and F4- 622R airplanes, and Model A300 C4-605R Variant F airplanes. (d) Subject Air Transport...

  1. The Raffaello, a Multi-Purpose Logistics Module, arrives at KSC aboard a Beluga super transporter

    NASA Technical Reports Server (NTRS)

    1999-01-01

    An Airbus Industrie A300-600ST 'Beluga' Super Transporter touches down at the Shuttle Landing Facility to deliver its cargo, the second Multi-Purpose Logistics Module (MPLM) for the International Space Station (ISS). One of Italy's major contributions to the ISS program, the MPLM, named Raffaello, is a reusable logistics carrier and the primary delivery system used to resupply and return station cargo requiring a pressurized environment. Weighing nearly 4.5 tons, the module measures 21 feet long and 15 feet in diameter. Raffaello will join Leonardo, the first Italian-built MPLM, in the Space Station Processing Facility for testing. NASA, Boeing, the Italian Space Agency and Alenia Aerospazio will provide engineering support.

  2. The Raffaello, a Multi-Purpose Logistics Module, arrives at KSC aboard a Beluga super transporter

    NASA Technical Reports Server (NTRS)

    1999-01-01

    An Airbus Industrie A300-600ST 'Beluga' Super Transporter lands in the rain at the Shuttle Landing Facility to deliver its cargo, the second Multi-Purpose Logistics Module (MPLM) for the International Space Station (ISS). One of Italy's major contributions to the ISS program, the MPLM, named Raffaello, is a reusable logistics carrier and the primary delivery system used to resupply and return station cargo requiring a pressurized environment. Weighing nearly 4.5 tons, the module measures 21 feet long and 15 feet in diameter. Raffaello will join Leonardo, the first Italian-built MPLM, in the Space Station Processing Facility for testing. NASA, Boeing, the Italian Space Agency and Alenia Aerospazio will provide engineering support.

  3. Raffaello is offloaded from a Beluga super transporter

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At the Shuttle Landing Facility, the one-piece, upward-hinged main cargo door of the Airbus Industrie A300-600ST 'Beluga' Super Transporter is open to offload its cargo, the second Multi-Purpose Logistics Module (MPLM) for the International Space Station (ISS). One of Italy's major contributions to the ISS program, the MPLM, named Raffaello, is a reusable logistics carrier and the primary delivery system used to resupply and return station cargo requiring a pressurized environment. Weighing nearly 4.5 tons, the module measures 21 feet long and 15 feet in diameter. Raffaello will join Leonardo, the first Italian-built MPLM, in the Space Station Processing Facility for testing. NASA, Boeing, the Italian Space Agency and Alenia Aerospazio will provide engineering support.

  4. The Raffaello, a Multi-Purpose Logistics Module, arrives at KSC aboard a Beluga super transporter

    NASA Technical Reports Server (NTRS)

    1999-01-01

    An Airbus Industrie A300-600ST 'Beluga' Super Transporter is reflected in the rain puddles as it comes to a stop at the Shuttle Landing Facility. The Beluga is carrying the Raffaello, the second Multi-Purpose Logistics Module (MPLM) for the International Space Station (ISS). One of Italy's major contributions to the ISS program, the MPLM is a reusable logistics carrier and the primary delivery system used to resupply and return station cargo requiring a pressurized environment. Weighing nearly 4.5 tons, the module measures 21 feet long and 15 feet in diameter. Raffaello will join Leonardo, the first Italian-built MPLM, in the Space Station Processing Facility for testing. NASA, Boeing, the Italian Space Agency and Alenia Aerospazio will provide engineering support.

  5. The Raffaello, a Multi-Purpose Logistics Module, arrives at KSC aboard a Beluga super transporter

    NASA Technical Reports Server (NTRS)

    1999-01-01

    An Airbus Industrie A300-600ST 'Beluga' Super Transporter is reflected in the rain puddles as it taxis toward the mate/demate tower at the Shuttle Landing Facility. The Beluga is carrying the Raffaello, the second Multi-Purpose Logistics Module (MPLM) for the International Space Station (ISS). One of Italy's major contributions to the ISS program, the MPLM is a reusable logistics carrier and the primary delivery system used to resupply and return station cargo requiring a pressurized environment. Weighing nearly 4.5 tons, the module measures 21 feet long and 15 feet in diameter. Raffaello will join Leonardo, the first Italian-built MPLM, in the Space Station Processing Facility for testing. NASA, Boeing, the Italian Space Agency and Alenia Aerospazio will provide engineering support.

  6. 76 FR 25259 - Airworthiness Directives; Airbus Model A300 B4-600, A300 B4-600R, and A300 F4-600R Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-04

    ...], reported the failure during a wind tunnel test of a balance weight fastening screw on the RAT turbine cover... balance weight fastening screw on the RAT turbine cover during a wind tunnel test. After investigation, it... failure during a wind tunnel test of a balance weight fastening screw on the RAT turbine cover. After...

  7. 76 FR 47430 - Airworthiness Directives; Airbus Model A300 B4-600, A300 B4-600R, and A300 F4-600R Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-05

    ...], reported the failure during a wind tunnel test of a balance weight fastening screw on the RAT turbine cover... balance weight fastening screw on the RAT turbine cover during a wind tunnel test. After investigation, it... during a wind tunnel test of a balance weight fastening screw on the RAT turbine cover. After...

  8. 76 FR 46 - Airworthiness Directives; Airbus Model A310-203, -204, -222, -304, -322, and -324 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ... radius of the rework is less than 20.0 mm (0.787 inch), before further flight, increase the radius and do... this AD. (B) If cracking is found and the radius of the rework is 20.0 mm (0.787 inch) or more, before... cracking is found and the radius of the rework is 20.0 mm (0.787 inch) or more. Paragraph (g)(3)(i)(B) of...

  9. 76 FR 27246 - Airworthiness Directives; Airbus Model A310-203, -204, -222, -304, -322, and -324 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ..., 2008. (A) If cracking is found and the radius of the rework is less than 20.0 mm (0.787 inch), before... paragraph (g)(6) of this AD. (B) If cracking is found and the radius of the rework is 20.0 mm (0.787 inch... information do not specify a corrective action if cracking is found and the radius of the rework is 20.0 mm (0...

  10. 75 FR 11435 - Airworthiness Directives; Airbus Model A300 B4-2C, B4-103, and B4-203 Airplanes; and Model A300...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-11

    ... operator reported that, during a routine inspection, the Right Hand frame 40 forward fitting between... result in a deterioration of the structural integrity of the frame. * * * * * We are issuing this AD to... operator reported that, during a routine inspection, the Right Hand frame 40 forward fitting between...

  11. 75 FR 61975 - Airworthiness Directives; Airbus Model A300 B4-600 Series Airplanes, Model A300 B4-600R Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-07

    ... contains regulatory documents #0;having general applicability and legal effect, most of which are keyed #0... programme (42,500 FC [flight cycles]), it has been concluded that a reinforcement of the junction of frame... Goal (ESG). * * * [Failure of the frame base], if not corrected, could affect the structural integrity...

  12. 75 FR 28480 - Airworthiness Directives; Airbus Model A300 Series Airplanes; Model A300 B4-600, B4-600R, F4-600R...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-21

    ... pressurise the hydraulic reservoirs, due to leakage of the Crissair reservoir air pressurisation check valves. * * * The leakage of the check valves was caused by an incorrect spring material. The affected Crissair check valves * * * were then replaced with improved check valves P/N [part number] 2S2794-1 * * *. More...

  13. 75 FR 32266 - Airworthiness Directives; Airbus Model A300 Series Airplanes; Airbus Model A300 B4-600, B4-600R...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-08

    ... after receipt. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010... Transportation (DOT). ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for the...

  14. 75 FR 38061 - Airworthiness Directives; Airbus Model A300 B4-600 Series Airplanes; Model A300 B4-600R Series...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-01

    ... dimensional measurement of the holes, and doing corrective actions if necessary; doing an eddy current... dimensional measurement of the holes, doing an eddy current inspection of the holes for cracking, doing a cold... the effective date of this AD, prior to doing any cold working process, determine if an eddy current...

  15. 15 CFR 8a.220 - Admissions.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... vocational education, professional education, graduate higher education, and public institutions of undergraduate higher education. (e) Public institutions of undergraduate higher education. §§ 8a.300 through 8a.310 do not apply to any public institution of undergraduate higher education that traditionally and...

  16. 15 CFR 8a.220 - Admissions.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... vocational education, professional education, graduate higher education, and public institutions of undergraduate higher education. (e) Public institutions of undergraduate higher education. §§ 8a.300 through 8a.310 do not apply to any public institution of undergraduate higher education that traditionally and...

  17. 15 CFR 8a.220 - Admissions.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... vocational education, professional education, graduate higher education, and public institutions of undergraduate higher education. (e) Public institutions of undergraduate higher education. §§ 8a.300 through 8a.310 do not apply to any public institution of undergraduate higher education that traditionally and...

  18. 15 CFR 8a.220 - Admissions.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... vocational education, professional education, graduate higher education, and public institutions of undergraduate higher education. (e) Public institutions of undergraduate higher education. §§ 8a.300 through 8a.310 do not apply to any public institution of undergraduate higher education that traditionally and...

  19. 15 CFR 8a.220 - Admissions.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... vocational education, professional education, graduate higher education, and public institutions of undergraduate higher education. (e) Public institutions of undergraduate higher education. §§ 8a.300 through 8a.310 do not apply to any public institution of undergraduate higher education that traditionally and...

  20. Space imaging of a 300 years old cooling magma chamber: Timanfaya volcano (Lanzarote, Canary Islands)

    NASA Astrophysics Data System (ADS)

    Gonzalez, P. J.; Tiampo, K. F.

    2010-12-01

    Multitemporal space radar interferometry analysis between 1992 and 2000 revealed significantly deforming areas with a magnitude of 4-6 mm/yr of lengthening in the radar line of sight at Timanfaya volcano (Lanzarote, Canary Island). Timanfaya volcano erupted almost 300 years ago (1730-1736), along a 15 km-long fissure-feeding magmatic system, resulting in the longest and largest historical eruption of the Canarian archipelago to date, with >1 km3 of erupted basaltic lavas covering 200 km2. High surficial temperature (600 degrees-C at 13 m) and high heat flux measurements (150 mW/m2) suggest that the remnants of the magmatic chamber that fed the 1730-1736 are still partly molten. Here, we present preliminary models of the subsidence taking into account all available data, including geophysical data (heat flux, seismic, magnetotelluric and gravity), the geochemistry of freshly erupted lavas, upper mantle and crustal xenoliths, and structural geology.

  1. A 300-million-year record of atmospheric carbon dioxide from fossil plant cuticles

    NASA Astrophysics Data System (ADS)

    Retallack, Gregory J.

    2001-05-01

    To understand better the link between atmospheric CO2 concentrations and climate over geological time, records of past CO2 are reconstructed from geochemical proxies. Although these records have provided us with a broad picture of CO2 variation throughout the Phanerozoic eon (the past 544Myr), inconsistencies and gaps remain that still need to be resolved. Here I present a continuous 300-Myr record of stomatal abundance from fossil leaves of four genera of plants that are closely related to the present-day Ginkgo tree. Using the known relationship between leaf stomatal abundance and growing season CO2 concentrations, I reconstruct past atmospheric CO2 concentrations. For the past 300Myr, only two intervals of low CO2 (<1,000p.p.m.v.) are inferred, both of which coincide with known ice ages in Neogene (1-8Myr) and early Permian (275-290Myr) times. But for most of the Mesozoic era (65-250Myr), CO2 levels were high (1,000-2,000p.p.m.v.), with transient excursions to even higher CO2 (>2,000p.p.m.v.) concentrations. These results are consistent with some reconstructions of past CO2 (refs 1, 2) and palaeotemperature records, but suggest that CO2 reconstructions based on carbon isotope proxies may be compromised by episodic outbursts of isotopically light methane. These results support the role of water vapour, methane and CO2 in greenhouse climate warming over the past 300Myr.

  2. UNAM Scientific Drilling Program of Chicxulub Impact Structure-Evidence for a 300 kilometer crater diameter

    NASA Astrophysics Data System (ADS)

    Urrutia-Fucugauchi, J.; Marin, L.; Trejo-Garcia, A.

    As part of the UNAM drilling program at the Chicxulub structure, two 700 m deep continuously cored boreholes were completed between April and July, 1995. The Peto UNAM-6 and Tekax UNAM-7 drilling sites are ˜150 km and 125 km, respectively, SSE of Chicxulub Puerto, near the crater's center. Core samples from both sites show a sequence of post-crater carbonates on top of a thick impact breccia pile covering the disturbed Mesozoic platform rocks. At UNAM-7, two impact breccia units were encountered: (1) an upper breccia, mean magnetic susceptibility is high (˜55 × 10-6 SI units), indicating a large component of silicate basement has been incorporated into this breccia, and (2) an evaporite-rich, low susceptibility impact breccia similar in character to the evaporite-rich breccias observed at the PEMEX drill sites further out. The upper breccia was encountered at ˜226 m below the surface and is ˜125 m thick; the lower breccia is immediately subjacent and is >240 m thick. This two-breccia sequence is typical of the suevite-Bunte breccia sequence found within other well preserved impact craters. The suevitic upper unit is not present at UNAM-6. Instead, a >240 m thick evaporite-rich breccia unit, similar to the lower breccia at UNAM-7, was encountered at a depth of ˜280 m. The absence of an upper breccia equivalent at UNAM-6 suggests some portion of the breccia sequence has been removed by erosion. This is consistent with interpretations that place the high-standing crater rim at 130-150 km from the center. Consequently, the stratigraphic observations and magnetic susceptibiity records on the upper and lower breccias (depth and thickness) support a ˜300 km diameter crater model.

  3. Latest evolution in a 300mm graphoepitaxy pilot line flow for L/S applications

    NASA Astrophysics Data System (ADS)

    Claveau, G.; Argoud, M.; Pimenta-Barros, P.; Chamiot-Maitral, G.; Tiron, R.; Chevalier, X.; Navarro, C.

    2017-03-01

    Directed Self Assembly (DSA) of block-copolymers (BCPs) used as a complementary technique to the 193nm immersion lithography has demonstrated sub-10nm node applications in both via and line/space patterning. We propose however to study the performance of graphoepitaxy which allows DSA with thicker initial BCP layer, higher multiplication factors and stronger orientation control of lamellae. The aim of this work is to use the 300mm pilot line available at LETI and Arkema's advanced materials to evaluate the performances of a novel graphoepitaxy process based on the work on a 38nm period lamellar PS-b-PMMA (L38) reported before.

  4. Process characteristics and design methods for a 300 deg quad OP amp

    NASA Technical Reports Server (NTRS)

    Beasom, J. D.; Patterson, R. B., III

    1981-01-01

    The results of process characterization, circuit design, and reliability studies for the development of a quad OP amplifier intended for use up to 300 C are presented. A dielectrically isolated complementary vertical bipolar process was chosen to fabricate the amplifier in order to eliminate isolation leakage and the possibility of latch up. Characterization of NPN and PNP junctions showed them to be suitable for use up to 300 C. Interconnect reliability was predicted to be greater than four years mean time between failure. Parasitic MOS formation was eliminated by isolation of each device.

  5. The Role of a Physical Analysis Laboratory in a 300 mm IC Development and Manufacturing Centre

    NASA Astrophysics Data System (ADS)

    Kwakman, L. F. Tz.; Bicais-Lepinay, N.; Courtas, S.; Delille, D.; Juhel, M.; Trouiller, C.; Wyon, C.; de la Bardonnie, M.; Lorut, F.; Ross, R.

    2005-09-01

    To remain competitive IC manufacturers have to accelerate the development of most advanced (CMOS) technology and to deliver high yielding products with best cycle times and at a competitive pricing. With the increase of technology complexity, also the need for physical characterization support increases, however many of the existing techniques are no longer adequate to effectively support the 65-45 nm technology node developments. New and improved techniques are definitely needed to better characterize the often marginal processes, but these should not significantly impact fabrication costs or cycle time. Hence, characterization and metrology challenges in state-of-the-art IC manufacturing are both of technical and economical nature. TEM microscopy is needed for high quality, high volume analytical support but several physical and practical hurdles have to be taken. The success rate of FIB-SEM based failure analysis drops as defects often are too small to be detected and fault isolation becomes more difficult in the nano-scale device structures. To remain effective and efficient, SEM and OBIRCH techniques have to be improved or complemented with other more effective methods. Chemical analysis of novel materials and critical interfaces requires improvements in the field of e.g. SIMS, ToF-SIMS. Techniques that previously were only used sporadically, like EBSD and XRD, have become a `must' to properly support backend process development. At the bright side, thanks to major technical advances, techniques that previously were practiced at laboratory level only now can be used effectively for at-line fab metrology: Voltage Contrast based defectivity control, XPS based gate dielectric metrology and XRD based control of copper metallization processes are practical examples. In this paper capabilities and shortcomings of several techniques and corresponding equipment are presented with practical illustrations of use in our Crolles facilities.

  6. 75 FR 75870 - Airworthiness Directives; Airbus Model A300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-07

    ... to the aeroplane has two load paths, a Primary Load Path (PLP) and a Secondary Load Path (SLP), which is only engaged in case of PLP failure. Following the design intent, engagement of the SLP leads to... representative flights have demonstrated that, when the SLP is engaged, it does not systematically jam the THSA...

  7. 75 FR 52652 - Airworthiness Directives; Airbus Model A300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-27

    ... to the aeroplane has two load paths, a Primary Load Path (PLP) and a Secondary Load Path (SLP), which is only engaged in case of PLP failure. Following the design intent, engagement of the SLP leads to... representative flights have demonstrated that, when the SLP is engaged, it does not systematically jam the THSA...

  8. Study on cold head structure of a 300 Hz thermoacoustically driven pulse tube cryocooler

    NASA Astrophysics Data System (ADS)

    Yu, G. Y.; Wang, X. T.; Dai, W.; Luo, E. C.

    2012-04-01

    High reliability, compact size and potentially high thermal efficiency make the high frequency thermoacoustically-driven pulse tube cryocooler quite promising for space use. With continuous efforts, the lowest temperature and the thermal efficiency of the coupled system have been greatly improved. So far, a cold head temperature below 60 K has been achieved on such kind of cryocooler with the operation frequency of around 300 Hz. To further improve the thermal efficiency and expedite its practical application, this work focuses on studying the influence of cold head structure on the system performance. Substantial numerical simulations were firstly carried out, which revealed that the cold head structure would greatly influence the cooling power and the thermal efficiency. To validate the predictions, a lot of experiments have been done. The experiments and calculations are in reasonable agreement. With 500 W heating power input into the engine, a no-load temperature of 63 K and a cooling power of 1.16 W at 80 K have been obtained with parallel-plate cold head, indicating encouraging improvement of the thermal efficiency.

  9. Demonstration of Essential Reliability Services by a 300-MW Solar Photovoltaic Power Plant

    SciTech Connect

    Loutan, Clyde; Klauer, Peter; Chowdhury, Sirajul

    The California Independent System Operator (CAISO), First Solar, and the National Renewable Energy Laboratory (NREL) conducted a demonstration project on a large utility-scale photovoltaic (PV) power plant in California to test its ability to provide essential ancillary services to the electric grid. With increasing shares of solar- and wind-generated energy on the electric grid, traditional generation resources equipped with automatic governor control (AGC) and automatic voltage regulation controls -- specifically, fossil thermal -- are being displaced. The deployment of utility-scale, grid-friendly PV power plants that incorporate advanced capabilities to support grid stability and reliability is essential for the large-scale integrationmore » of PV generation into the electric power grid, among other technical requirements. A typical PV power plant consists of multiple power electronic inverters and can contribute to grid stability and reliability through sophisticated 'grid-friendly' controls. In this way, PV power plants can be used to mitigate the impact of variability on the grid, a role typically reserved for conventional generators. In August 2016, testing was completed on First Solar's 300-MW PV power plant, and a large amount of test data was produced and analyzed that demonstrates the ability of PV power plants to use grid-friendly controls to provide essential reliability services. These data showed how the development of advanced power controls can enable PV to become a provider of a wide range of grid services, including spinning reserves, load following, voltage support, ramping, frequency response, variability smoothing, and frequency regulation to power quality. Specifically, the tests conducted included various forms of active power control such as AGC and frequency regulation; droop response; and reactive power, voltage, and power factor controls. This project demonstrated that advanced power electronics and solar generation can be controlled to contribute to system-wide reliability. It was shown that the First Solar plant can provide essential reliability services related to different forms of active and reactive power controls, including plant participation in AGC, primary frequency control, ramp rate control, and voltage regulation. For AGC participation in particular, by comparing the PV plant testing results to the typical performance of individual conventional technologies, we showed that regulation accuracy by the PV plant is 24-30 points better than fast gas turbine technologies. The plant's ability to provide volt-ampere reactive control during periods of extremely low power generation was demonstrated as well. The project team developed a pioneering demonstration concept and test plan to show how various types of active and reactive power controls can leverage PV generation's value from being a simple variable energy resource to a resource that provides a wide range of ancillary services. With this project's approach to a holistic demonstration on an actual, large, utility-scale, operational PV power plant and dissemination of the obtained results, the team sought to close some gaps in perspectives that exist among various stakeholders in California and nationwide by providing real test data.« less

  10. Heat Transfer Coefficient Distribution in the Furnace of a 300MWe CFB Boiler

    NASA Astrophysics Data System (ADS)

    Zhang, P.; Lu, J. F.; Yang, H. R.; Zhang, J. S.; Zhang, H.; Yue, G. X.

    Properly understanding and calculating the distributions of heat flux and heat transfer coefficient (α) in the furnace is important in designing a circulating fluidized bed (CFB) boiler, especially with supercritical parameters. Experimental study on the heat transfer in a commercial 300MWe CFB boiler was conducted. The α from the bed to the water wall was measured by the finite element method (FEM), at five different heights. The influence of suspension density and bed temperature on α was analyzed. It was found that the pressure difference between the inlet and exit of the three cyclones, and the chamber pressure of the corresponding loop seal were not equal. The results indicated the suspension solid density was non-uniform in the cross section at a certain height. Consequently, the distributions of heat flux and α in the horizontal plane in the furnace was non-uniform. The furnace can divided into three sections according to the arrangement of the platen superheaters hanging in the upper CFB furnace. In each section, the heat flux near the center showed increasing trend.

  11. A 300-year Vietnam hydroclimate and ENSO variability record reconstructed from tree ring δ18O

    NASA Astrophysics Data System (ADS)

    Sano, Masaki; Xu, Chenxi; Nakatsuka, Takeshi

    2012-06-01

    A tree ring δ18O chronology is developed for the past 300 years (1705-2004) using 6 cypress trees from northern Vietnam to reconstruct long-term hydroclimatic variations in the summer monsoon season. To the best of our knowledge, this is the first well-replicated tree ringδ18O chronology from Southeast Asia, as well as the longest yet produced. Response analyses reveal that tree ring δ18O is significantly correlated with temperature, precipitation, and the Palmer Drought Severity Index (PDSI) during the period May-October, with highest correlation to the PDSI. Our δ18O chronology accounts for 44% of the PDSI variance, and is in good agreement with a 52-year tree ringδ18O chronology from northern Laos (r = 0.77), indicating that regional hydroclimatic signals are well recorded in the δ18O data. Spatial correlation analyses with global sea surface temperatures suggest that the tropical Pacific plays an important role in modulating hydroclimate over the study region. Further, the δ18O chronology correlates significantly with El Niño-Southern Oscillation (ENSO)-related indices, and is therefore used to reconstruct the annual Multivariate ENSO Index. Because previously published ENSO reconstructions are based mainly on proxy records originating from North America and/or the tropical Pacific, the future development of a tree ringδ18O network from mainland Southeast Asia could lead to an independent and more robust reconstruction of ENSO variability.

  12. Development of a 300,000-pixel ultrahigh-speed high-sensitivity CCD

    NASA Astrophysics Data System (ADS)

    Ohtake, H.; Hayashida, T.; Kitamura, K.; Arai, T.; Yonai, J.; Tanioka, K.; Maruyama, H.; Etoh, T. Goji; Poggemann, D.; Ruckelshausen, A.; van Kuijk, H.; Bosiers, Jan T.

    2006-02-01

    We are developing an ultrahigh-speed, high-sensitivity broadcast camera that is capable of capturing clear, smooth slow-motion videos even where lighting is limited, such as at professional baseball games played at night. In earlier work, we developed an ultrahigh-speed broadcast color camera1) using three 80,000-pixel ultrahigh-speed, highsensitivity CCDs2). This camera had about ten times the sensitivity of standard high-speed cameras, and enabled an entirely new style of presentation for sports broadcasts and science programs. Most notably, increasing the pixel count is crucially important for applying ultrahigh-speed, high-sensitivity CCDs to HDTV broadcasting. This paper provides a summary of our experimental development aimed at improving the resolution of CCD even further: a new ultrahigh-speed high-sensitivity CCD that increases the pixel count four-fold to 300,000 pixels.

  13. Design and Integration of Hydrostatic Transmission in a 300-HP Marine Corps Amphibious Vehicle

    DTIC Science & Technology

    1985-03-01

    tests , and the control logic, micro- computer hardware , and electro-hydraulic actuators that transform operator inputs into drivetrain outputs. Also...actually the case based on manufacturers’ information. The use of swash plate pumps in this application presents no real problem and is in fact the ...industry norm. Although the swash plate pumps do suffer slightly from a decrease in

  14. Performance of a 300 Mbps 1:16 serial/parallel optoelectronic receiver module

    NASA Technical Reports Server (NTRS)

    Richard, M. A.; Claspy, P. C.; Bhasin, K. B.; Bendett, M. B.

    1990-01-01

    Optical interconnects are being considered for the high speed distribution of multiplexed control signals in GaAs monolithic microwave integrated circuit (MMIC) based phased array antennas. The performance of a hybrid GaAs optoelectronic integrated circuit (OEIC) is described, as well as its design and fabrication. The OEIC converts a 16-bit serial optical input to a 16 parallel line electrical output using an on-board 1:16 demultiplexer and operates at data rates as high as 30b Mbps. The performance characteristics and potential applications of the device are presented.

  15. Mineralized rods and cones suggest colour vision in a 300 Myr-old fossil fish.

    PubMed

    Tanaka, Gengo; Parker, Andrew R; Hasegawa, Yoshikazu; Siveter, David J; Yamamoto, Ryoichi; Miyashita, Kiyoshi; Takahashi, Yuichi; Ito, Shosuke; Wakamatsu, Kazumasa; Mukuda, Takao; Matsuura, Marie; Tomikawa, Ko; Furutani, Masumi; Suzuki, Kayo; Maeda, Haruyoshi

    2014-12-23

    Vision, which consists of an optical system, receptors and image-processing capacity, has existed for at least 520 Myr. Except for the optical system, as in the calcified lenses of trilobite and ostracod arthropods, other parts of the visual system are not usually preserved in the fossil record, because the soft tissue of the eye and the brain decay rapidly after death, such as within 64 days and 11 days, respectively. The Upper Carboniferous Hamilton Formation (300 Myr) in Kansas, USA, yields exceptionally well-preserved animal fossils in an estuarine depositional setting. Here we show that the original colour, shape and putative presence of eumelanin have been preserved in the acanthodii fish Acanthodes bridgei. We also report on the tissues of its eye, which provides the first record of mineralized rods and cones in a fossil and indicates that this 300 Myr-old fish likely possessed colour vision.

  16. Engineering and erection of a 300kW high-flux solar simulator

    NASA Astrophysics Data System (ADS)

    Wieghardt, Kai; Laaber, Dmitrij; Hilger, Patrick; Dohmen, Volkmar; Funken, Karl-Heinz; Hoffschmidt, Bernhard

    2017-06-01

    German Aerospace Center (DLR) is currently constructing a new high-flux solar simulator synlight which shall be commissioned in late 2016. The new facility will provide three separately operated experimental spaces with expected radiant powers of about 300kW / 240kW / 240kW respectively. synlight was presented to the public for the first time at SolarPACES 2015 [1]. Its engineering and erection is running according to plan. The current presentation reports about the engineering and the ongoing erection of the novel facility, and gives an outlook on its new level of possibilities for solar testing and qualification.

  17. Cottage Crafts Final Report. ESL Cottage Industry Education and Employment Program. July 1, 1982 - June 30, 1983. A 310 Adult Education Project.

    ERIC Educational Resources Information Center

    Henry, Jean; And Others

    The ESL (English as a second language) Cottage Industry Education and Employment Program was developed to provide ESL and life skills instruction to homebound and elderly refugees while, at the same time, fostering the continuation of native crafts and folklife. The program was the cooperative effort of local adult education staff, leaders and…

  18. A Quick and Handy Guide to Educational Mentoring. A Product of a 310 Special Demonstration Training Project 1982-83, "Training Mentors as Educational Counselors of Adult Learners."

    ERIC Educational Resources Information Center

    Singer, Elizabeth

    Developed in two training sessions involving key personnel from business, industry, and community agencies who counsel employees or clients about career changes, this handbook is intended to help persons who are responsible for guiding adults through educational or career changes. The guide is organized into 11 sections. Topics covered by these…

  19. 14 CFR 129.117 - Flammability reduction means.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... requirements of § 26.33 of this chapter is operational. Table 1 Model—Boeing Model—Airbus 747 Series A318, A319.... Table 2 Model—Boeing Model—Airbus 747 Series A318, A319, A320, A321 Series 737 Series A300, A310 Series... modified to comply with § 26.33(c) of this chapter. Table 3 Model—Boeing Model—Airbus 747 Series A318, A319...

  20. 14 CFR 26.35 - Changes to type certificates affecting fuel tank flammability.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...—Airbus A318, A319, A320, A321 Series A300, A310 Series A330, A340 Series (d) Design Changes and Service...) Applicability. This section applies to holders and applicants for approvals of the following design changes to any airplane subject to 14 CFR 26.33(a): (1) Any fuel tank designed to be Normally Emptied if the fuel...

  1. 14 CFR 26.35 - Changes to type certificates affecting fuel tank flammability.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...—Airbus A318, A319, A320, A321 Series A300, A310 Series A330, A340 Series (d) Design Changes and Service...) Applicability. This section applies to holders and applicants for approvals of the following design changes to any airplane subject to 14 CFR 26.33(a): (1) Any fuel tank designed to be Normally Emptied if the fuel...

  2. 14 CFR 26.35 - Changes to type certificates affecting fuel tank flammability.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...—Airbus A318, A319, A320, A321 Series A300, A310 Series A330, A340 Series (d) Design Changes and Service...) Applicability. This section applies to holders and applicants for approvals of the following design changes to any airplane subject to 14 CFR 26.33(a): (1) Any fuel tank designed to be Normally Emptied if the fuel...

  3. 14 CFR 26.35 - Changes to type certificates affecting fuel tank flammability.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...—Airbus A318, A319, A320, A321 Series A300, A310 Series A330, A340 Series (d) Design Changes and Service...) Applicability. This section applies to holders and applicants for approvals of the following design changes to any airplane subject to 14 CFR 26.33(a): (1) Any fuel tank designed to be Normally Emptied if the fuel...

  4. 14 CFR 26.35 - Changes to type certificates affecting fuel tank flammability.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...—Airbus A318, A319, A320, A321 Series A300, A310 Series A330, A340 Series (d) Design Changes and Service...) Applicability. This section applies to holders and applicants for approvals of the following design changes to any airplane subject to 14 CFR 26.33(a): (1) Any fuel tank designed to be Normally Emptied if the fuel...

  5. 14 CFR 129.117 - Flammability reduction means.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... requirements of § 26.33 of this chapter is operational. Table 1 Model—Boeing Model—Airbus 747 Series A318, A319.... Table 2 Model—Boeing Model—Airbus 747 Series A318, A319, A320, A321 Series 737 Series A300, A310 Series... modified to comply with § 26.33(c) of this chapter. Table 3 Model—Boeing Model—Airbus 747 Series A318, A319...

  6. 14 CFR 129.117 - Flammability reduction means.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... requirements of § 26.33 of this chapter is operational. Table 1 Model—Boeing Model—Airbus 747 Series A318, A319.... Table 2 Model—Boeing Model—Airbus 747 Series A318, A319, A320, A321 Series 737 Series A300, A310 Series... modified to comply with § 26.33(c) of this chapter. Table 3 Model—Boeing Model—Airbus 747 Series A318, A319...

  7. The Boeing 767 Program: A Case Study of Issues Related to Success in Managing an International Cooperative Project

    DTIC Science & Technology

    1986-09-01

    38 percent, British Aerospace (United Kingdom) 20 percent, and Construcciones Aeronauticas (Spain) 4 percent. Airbus is a French consortium which...Deutsche Air- bus, 26 percent for British Aerospace and 6 percent for Construcciones Aeronauticas (16:56). The A300 and A310 are currently in production and...commuter transport. The codevelopment partners are Construcciones Aeronauticas (Spain) and P. T. Nurtanio (Indonesia). "Engineering and manufacturing

  8. Free-flying experiment to measure the Schawlow-Townes linewidth limit of a 300 THz laser oscillator

    NASA Technical Reports Server (NTRS)

    Byer, R. L.; Byvik, C. E.

    1988-01-01

    Recent advances in laser diode-pumped solid state laser sources permit the design and testing of laser sources with linewidths that approach the Schawlow-Townes limit of 1 Hz/mW of output power. Laser diode pumped solid state ring oscillators have been operated with CW output power levels of 25 mW at electrical efficiencies that exceed 6 percent. These oscillators are expected to operate for lifetimes that approach those of the laser diode sources which is now approaching 20,000 hours. The efficiency and lifetime of these narrow linewidth laser sources will enable space measurements of gravity waves, remote sensing applications (including local range rate and measurements), and laser sources for frequency and time standards. A free-flight experiment, 'SUNLITE', is being designed to measure the linewidth of this all-solid-state laser system.

  9. Study on Matching a 300 MVA Motor Generator with an Ohmic Heating Power Supply in HL-2M

    NASA Astrophysics Data System (ADS)

    Peng, Jianfei; Xuan, Weimin; Wang, Haibing; Li, Huajun; Wang, Yingqiao; Wang, Shujin

    2013-03-01

    A new 300 MVA/1350 MJ motor generator (MG) will be built to feed all of the poloidal field power supplies (PFPS) and auxiliary heating power supplies of the HL-2M tokamak. The MG has a vertical-shaft salient pole 6-phase synchronous generator and a coaxial 8500 kW induction motor. The Ohmic heating power supply (OHPS) consisting of 4-quadrant DC pulsed convertor is the one with the highest parameters among the PFPS. Therefore, the match between the generator and the OHPS is very important. The matching study with Matlab/Simulink is described in this paper. The simulation results show that the subtransient reactance of the generator is closely related to the inversion operation of the OHPS. By setting various subtransient reactance in the simulation generator model and considering the cost reduction, the optimized parameters are obtained as x″d = 0.405 p.u. at 100 Hz for the generator. The models built in the simulation can be used as an important tool for studying the dynamic characteristics and the control strategy of other HL-2M PFPSes.

  10. First test of a high voltage feedthrough for liquid Argon TPCs connected to a 300 kV power supply

    NASA Astrophysics Data System (ADS)

    Cantini, C.; Gendotti, A.; Molina Bueno, L.; Murphy, S.; Radics, B.; Regenfus, C.; Rigaut, Y.-A.; Rubbia, A.; Sergiampietri, F.; Viant, T.; Wu, S.

    2017-03-01

    Voltages above a hundred kilo-volt will be required to generate the drift field of future very large liquid Argon Time Projection Chambers. One of the most delicate component is the feedthrough whose role is to safely deliver the very high voltage to the cathode through the thick insulating walls of the cryostat without compromising the purity of the argon inside. This requires a feedthrough that is typically meters long and carefully designed to be vacuum tight and have small heat input. Furthermore, all materials should be carefully chosen to allow operation in cryogenic conditions. In addition, electric fields in liquid argon should be kept below a threshold to reduce risks of discharges. The combination of all above requirements represents significant challenges from the design and manufacturing perspective. In this paper, we report on the successful operation of a feedthrough satisfying all the above requirements. The details of the feedthrough design and its manufacturing steps are provided. Very high voltages up to unprecedented voltages of -300 kV could be applied during long periods repeatedly. A source of instability was observed, which was specific to the setup configuration which was used for the test and not due to the feedthrough itself.

  11. A 300 year history of lead contamination in northern French Alps reconstructed from distant lake sediment records.

    PubMed

    Arnaud, F; Revel-Rolland, M; Bosch, D; Winiarski, T; Desmet, M; Tribovillard, N; Givelet, N

    2004-05-01

    Lead concentrations and isotopic ratios were measured along two well-dated sediment cores from two distant lakes: Anterne (2100 m a.s.l.) and Le Bourget (270 m a.s.l.), submitted to low and high direct human impact and covering the last 250 and 600 years, respectively. The measurement of lead in old sediment samples (>3000 BP) permits, in using mixing-models, the determination of lead concentration, flux and isotopic composition of purely anthropogenic origin. We thus show that since ca. 1800 AD the regional increase in lead contamination was mostly driven by coal consumption ((206)Pb/(207)Pb approximately 1.17-1.19; (206)Pb/(204)Pb approximately 18.3-18.6), which peaks around 1915 AD. The increasing usage of leaded gasoline, introduced in the 1920s, was recorded in both lakes by increasing Pb concentrations and decreasing Pb isotope ratios. A peak around 1970 ((206)Pb/(207)Pb approximately 1.13-1.16; (206)Pb/(204)Pb approximately 17.6-18.0) corresponds to the worldwide recorded leaded gasoline maximum of consumption. The 1973 oil crisis is characterised by a drastic drop of lead fluxes in both lakes (from approximately 35 to <20 mg cm(-2) yr(-1)). In the late 1980s, environmental policies made the Lake Anterne flux drop to pre-1900 values (<10 mg cm(-2) yr(-1)) while Lake Le Bourget is always submitted to an important flux (approximately 25 mg cm(-2) yr(-1)). The good match of our distant records, together and with a previously established series in an ice core from Mont Blanc, provides confidence in the use of sediments as archives of lead contamination. The integration of the Mont Blanc ice core results from Rosman et al. with our data highlights, from 1990 onward, a decoupling in lead sources between the high elevation sites (Lake Anterne and Mont Blanc ice core), submitted to a mixture of long-distance and regional contamination and the low elevation site (Lake Le Bourget), where regional contamination is predominant.

  12. Postfire changes in forest carbon storage over a 300-year chronosequence of Pinus contorta-dominated forests

    Treesearch

    Daniel M. Kashian; William H. Romme; Daniel B. Tinker; Monica G. Turner; Michael G. Ryan

    2013-01-01

    A warming climate may increase the frequency and severity of stand-replacing wildfires, reducing carbon (C) storage in forest ecosystems. Understanding the variability of postfire C cycling on heterogeneous landscapes is critical for predicting changes in C storage with more frequent disturbance. We measured C pools and fluxes for 77 lodgepole pine (Pinus contorta...

  13. A 300m-width sinkhole threatens the stability of the embankment of a saltpan in Jordan, Dead Sea Region

    NASA Astrophysics Data System (ADS)

    Closson, Damien; Abou Karaki, Najib; Pasquali, Paolo; Riccardi, Paolo

    2013-04-01

    Since the 1980s, the Dead Sea coastal zone is affected by sinkholes. The dynamic of the salt karst system is attested by a drastic increase of collapse events. The energy available for sub-surface erosion (or cavities genesis) is related to the head difference between the water table and the lake level which drop down at an accelerating rate of more than 1 m/yr. In the region of Ghor Al Haditha, Jordan, the size of the craters increased significantly during the last decade. Up to now, the greatest compound structure observed (association of metric subsidence, decametric sinkholes, and landslides) was about 150-200 m in diameter. End of December 2012, a single circular structure having 250-300 m in diameter was identified within a 10 km x 1.5 km saltpan of the Arab Potash Company. This finding raises questions regarding the origin of the underlying cavity and the capability of prediction of all models developed up to now in Israel and Jordan regarding the Dead Sea sinkholes. The analysis of satellite images of the past shows that the appearance of this unique depression is very recent (probably less than 5 years). Cosmo-SkyMed radar images have been processed to map the associated deformation field. Ground motions attest that the overall diameter could be around 600 m. Currently, this sinkhole is threatening the stability of more than one kilometer of a 12 km long dike holding 90 million m3 of Dead Sea brine. This case study underlines the great fragility of the Dead Sea salt karst and demonstrates the need for the setting up of an early warning system.

  14. A 300,000-mol-wt intermediate filament-associated protein in baby hamster kidney (BHK-21) cells.

    PubMed

    Yang, H Y; Lieska, N; Goldman, A E; Goldman, R D

    1985-02-01

    Native intermediate filament (IF) preparations from the baby hamster kidney fibroblastic cell line (BHK-21) contain a number of minor polypeptides in addition to the IF structural subunit proteins desmin, a 54,000-mol-wt protein, and vimentin, a 55,000-mol-wt protein. A monoclonal antibody was produced that reached exclusively with a high molecular weight (300,000) protein representative of these minor proteins. Immunological methods and comparative peptide mapping techniques demonstrated that the 300,000-mol-wt species was biochemically distinct from the 54,000- and 55,000-mol-wt proteins. Double-label immunofluorescence observations on spread BHK cells using this monoclonal antibody and a rabbit polyclonal antibody directed against the 54,000- and 55,000-mol-wt proteins showed that the 300,000-mol-wt species co-distributed with IF in a fibrous pattern. In cells treated with colchicine or those in the early stages of spreading, double-labeling with these antibodies revealed the co-existence of the respective antigens in the juxtanuclear cap of IF that is characteristic of cells in these physiological states. After colchicine removal, or in the late stages of cell spreading, the 300,00-mol-wt species and the IF subunits redistributed to their normal, highly coincident cytoplasmic patterns. Ultrastructural localization by the immunogold technique using the monoclonal antibody supported the light microscopic findings in that the 300,000-mol-wt species was associated with IF in the several physiological and morphological cell states investigated. The gold particle pattern was less intimately associated with IF than that defined by anti-54/55 and was one of non-uniform distribution along IF, being clustered primarily at points of proximity between IF, where an amorphous, proteinaceous material was often the labeled element. Occasionally, "bridges" of label were seen extending outward from such clusters on IF. Gold particles were infrequently bound to microtubules, microfilaments, or other cellular organelles, and when so, IF were usually contiguous. During multiple cycles of in vitro disassembly/assembly of the IF from native preparations, the 300,000-mol-wt protein remained in the fraction containing the 54,000- and 55,000-mol-wt structural subunits, whether the latter were in the soluble state or pelleted as formed filaments. In keeping with the nomenclature developed for the microtubule-associated proteins (MAPs), the acronym IFAP-300K (intermediate filament associated protein) is proposed for this molecule.

  15. Garden soil and house dust as exposure media for lead uptake in the mining village of Stratoni, Greece.

    PubMed

    Argyraki, Ariadne

    2014-08-01

    The relationships between two exposure media, garden soil and house dust, were studied for Pb uptake in Stratoni village in northern Greece, an industrial area of mining and processing of sulphide ore. Lead data for the two media were assessed in terms of total and bioaccessible content, measurement and geochemical variability, and mineralogical composition. It was found that total Pb was enriched in house dust samples by a factor of 2 on average. Total Pb concentration in soil samples had a maximum of 2,040 mg/kg and reached a maximum of 7,000 mg/kg in house dust samples. The estimated variability due to measurement uncertainty was dominated by the sampling process, and the proportion of sampling variance was greater for soil samples, indicating a higher degree of Pb heterogeneity in soil on the given spatial scale of sampling strata. Although the same general spatial trend was observed for both sampling media with decreasing Pb concentration by increasing distance from the ore-processing plant, Pb in dust samples displayed the highest concentrations within a 300-600-m zone from the ore-processing facility. The significant differences which were observed in Pb speciation between the studied media were explained by differences in mineralogical composition of outdoor soil and indoor dust. Lead-enriched Fe and Mn oxides predominated in soil samples while fine galena grains (<10-20 μm diameter) were the major Pb-bearing phase in dust samples. The integrated exposure uptake biokinetic model was used to predict the risk of elevated blood lead levels in children of Stratoni. Model prediction indicated an average probability of 61 % for blood-Pb to exceed 10 μg/dl. The results underline the importance of house dust in risk assessment and highlight the effect of outdoor and indoor conditions on the fate of Pb in the particular environment of Stratoni.

  16. A Wide-Band High-Gain Compact SIS Receiver Utilizing a 300-μW SiGe IF LNA

    NASA Astrophysics Data System (ADS)

    Montazeri, Shirin; Grimes, Paul K.; Tong, Cheuk-Yu Edward; Bardin, Joseph C.

    2017-06-01

    Low-power low-noise amplifiers integrated with superconductor-insulator-superconductor (SIS) mixers are required to enable implementation of large-scale focal plane arrays. In this work, a 220-GHz SIS mixer has been integrated with a high-gain broad-band low-power IF amplifier into a compact receiver module. The low noise amplifier (LNA) was specifically designed to match to the SIS output impedance and contributes less than 7 K to the system noise temperature over the 4-8 GHz IF frequency range. A receiver noise temperature of 30-45 K was measured for a local oscillator frequency of 220 GHz over an IF spanning 4-8 GHz. The LNA power dissipation was only 300-μW. To the best of the authors' knowledge, this is the lowest power consumption reported for a high-gain wide-band LNA directly integrated with an SIS mixer.

  17. A 300MHz Embedded Flash Memory with Pipeline Architecture and Offset-Free Sense Amplifiers for Dual-Core Automotive Microcontrollers

    NASA Astrophysics Data System (ADS)

    Kajiyama, Shinya; Fujito, Masamichi; Kasai, Hideo; Mizuno, Makoto; Yamaguchi, Takanori; Shinagawa, Yutaka

    A novel 300MHz embedded flash memory for dual-core microcontrollers with a shared ROM architecture is proposed. One of its features is a three-stage pipeline read operation, which enables reduced access pitch and therefore reduces performance penalty due to conflict of shared ROM accesses. Another feature is a highly sensitive sense amplifier that achieves efficient pipeline operation with two-cycle latency one-cycle pitch as a result of a shortened sense time of 0.63ns. The combination of the pipeline architecture and proposed sense amplifiers significantly reduces access-conflict penalties with shared ROM and enhances performance of 32-bit RISC dual-core microcontrollers by 30%.

  18. 75 FR 49370 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-13

    .... American Airlines states that this will allow for more efficient planning and will relieve the burden of obtaining special flight permits to move re-activated airplanes to facilities where the inspections are to.... We have added a compliance time of within 840 flight hours after the effective date of this AD to...

  19. 76 FR 18960 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-06

    ... unsafe condition is damage to wiring in the wing, center, and trim fuel tanks, due to failed P-clips used..., center, or trim fuel tanks. The proposed AD would require actions that are intended to address the unsafe..., 2009]. The unsafe condition is damage to wiring in the wing, center, and trim fuel tanks, due to failed...

  20. 76 FR 59008 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-23

    ...-bonding between the skin and honeycomb core. Such reworks were also performed on some rudders fitted on... as a result of de-bonding between the skin and honeycomb core. Such reworks were also performed on..., depending on findings, the application of corrective actions for those rudders where production reworks have...

  1. Development of a 300°C 3C Fiber Optic Downhole Seismic Receiver Array for Surveying and Monitoring of Geothermal Reservoirs

    SciTech Connect

    Paulsson, Bjorn N.P.

    2016-06-29

    To address the critical site characterization and monitoring needs for Enhance Geothermal Systems (EGS) programs, US Department of Energy (DOE) awarded Paulsson, Inc. in 2011 a contract to design, build and test a high temperature fiber optic based ultra-large bandwidth clamped borehole seismic vector array capable of deploying a large number of 3C sensor pods suitable for deployment into high temperature and high pressure boreholes. Paulsson, Inc. has completed a design or a unique borehole seismic system consisting of a novel drill pipe based deployment system that includes a hydraulic clamping mechanism for the sensor pods, a new sensor podmore » design and most important – a unique fiber optic seismic vector sensor with technical specifications and capabilities that far exceed the state of the art seismic sensor technologies. These novel technologies were all applied to the new borehole seismic system. In combination these technologies will allow for the deployment of up to 1,000 3C sensor pods in vertical, deviated or horizontal wells. Laboratory tests of the fiber optic seismic vector sensors developed during this project have shown that the new borehole seismic sensor technology is capable of generating outstanding high vector fidelity data with extremely large bandwidth: 0.01 – 6,000 Hz. Field tests have shown that the system can record events at magnitudes much smaller than M-4.0 at frequencies over 2,000 Hz. The sensors have also proved to be about 100 times more sensitive than the regular coil geophones that are used in borehole seismic systems today. The fiber optic seismic sensors have furthermore been qualified to operate at temperatures over 300°C (572°F). The data telemetry fibers used for the seismic vector sensors in the system are also used to simultaneously record Distributed Temperature Sensor (DTS) and Distributed Acoustic Sensor (DAS) data allowing additional value added data to be recorded simultaneously with the seismic vector sensor data.« less

  2. A 300-mV 220-nW event-driven ADC with real-time QRS detection for wearable ECG sensors.

    PubMed

    Zhang, Xiaoyang; Lian, Yong

    2014-12-01

    This paper presents an ultra-low-power event-driven analog-to-digital converter (ADC) with real-time QRS detection for wearable electrocardiogram (ECG) sensors in wireless body sensor network (WBSN) applications. Two QRS detection algorithms, pulse-triggered (PUT) and time-assisted PUT (t-PUT), are proposed based on the level-crossing events generated from the ADC. The PUT detector achieves 97.63% sensitivity and 97.33% positive prediction in simulation on the MIT-BIH Arrhythmia Database. The t-PUT improves the sensitivity and positive prediction to 97.76% and 98.59% respectively. Fabricated in 0.13 μm CMOS technology, the ADC with QRS detector consumes only 220 nW measured under 300 mV power supply, making it the first nanoWatt compact analog-to-information (A2I) converter with embedded QRS detector.

  3. 76 FR 42029 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-18

    ... load path, which would likely result in loss of control of the aeroplane. For the reasons explained... failure of the secondary load path, which would likely result in loss of control of the aeroplane... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2011...

  4. 76 FR 64798 - Airworthiness Directives; Airbus Model A300 B4-103, B4-203, and B4-2C Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-19

    ... condition as: One operator reported a failure of the MLG [main landing gear] retraction actuator sliding rod.... The MCAI states: One operator reported a failure of the MLG [main landing gear] retraction actuator..., December 10, 2007)] to require repetitive inspections of the retraction actuator sliding rod as installed...

  5. 76 FR 39248 - Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-06

    ... after receipt. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010... AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule...

  6. Ex vivo evaluation of safety and efficacy of vaporization of the prostate using a 300 W high-power laser diode with the wavelength of 980 nm

    NASA Astrophysics Data System (ADS)

    Takada, Junya; Honda, Norihiro; Hazama, Hisanao; Awazu, Kunio

    2014-03-01

    Laser vaporization of the prostate is one of the promising technique for less-invasive treatment of benign prostatic hyperplasia. However, shorter operative duration and higher hemostatic ability are expected. The wavelength of 980 nm offers a high simultaneous absorption by water and hemoglobin, so that it combines the efficient vaporization with good hemostasis. Therefore, we have evaluated the safety and efficacy of vaporization of the prostate using a recently developed 300 W high-power laser diode with the wavelength of 980 nm. First, validity of bovine prostate tissue as the sample was confirmed by measuring the optical properties of bovine and human prostate tissue using a double integrating sphere optical system. Next, contact and non-contact ex vivo irradiations were performed for various irradiation powers and times, and vaporized and coagulated depths were measured. In the contact irradiation, the vaporized depth at the power of 300 W was significantly deeper than that at the power of 100 W, while the difference was relatively smaller for the coagulated depths at 300 and 100 W. In the non-contact irradiation, coagulation as thick as that in the contact irradiation was observed almost without vaporization. Therefore, it is suggested that the treatment in the contact irradiation using the high-power laser diode can vaporize the prostate more efficiently without increasing the risk of perforation. Hemostasis with the coagulation would be possible in both irradiation methods. To prevent the postoperative perforation, operators need to understand the relationship between the coagulated depth and the irradiation conditions.

  7. Velocity- and pointing-error measurements of a 300 000-r/min self-bearing permanent-magnet motor for optical applications

    NASA Astrophysics Data System (ADS)

    Breitkopf, Sven; Lilienfein, Nikolai; Achtnich, Timon; Zwyssig, Christof; Tünnermann, Andreas; Pupeza, Ioachim; Limpert, Jens

    2018-06-01

    Compact, ultra-high-speed self-bearing permanent-magnet motors enable a wide scope of applications including an increasing number of optical ones. For implementation in an optical setup, the rotors have to satisfy high demands regarding their velocity and pointing errors. Only a restricted number of measurements of these parameters exist and only at relatively low velocities. This manuscript presents the measurement of the velocity and pointing errors at rotation frequencies up to 5 kHz. The acquired data allow us to identify the rotor drive as the main source of velocity variations with fast fluctuations of up to 3.4 ns (RMS) and slow drifts of 23 ns (RMS) over ˜120 revolutions at 5 kHz in vacuum. At the same rotation frequency, the pointing fluctuated by 12 μrad (RMS) and 33 μrad (peak-to-peak) over ˜10 000 round trips. To our best knowledge, this states the first measurement of velocity and pointing errors at multi-kHz rotation frequencies and will allow potential adopters to evaluate the feasibility of such rotor drives for their application.

  8. NASA Structural Analysis Report on the American Airlines Flight 587 Accident - Local Analysis of the Right Rear Lug

    NASA Technical Reports Server (NTRS)

    Raju, Ivatury S; Glaessgen, Edward H.; Mason, Brian H; Krishnamurthy, Thiagarajan; Davila, Carlos G

    2005-01-01

    A detailed finite element analysis of the right rear lug of the American Airlines Flight 587 - Airbus A300-600R was performed as part of the National Transportation Safety Board s failure investigation of the accident that occurred on November 12, 2001. The loads experienced by the right rear lug are evaluated using global models of the vertical tail, local models near the right rear lug, and a global-local analysis procedure. The right rear lug was analyzed using two modeling approaches. In the first approach, solid-shell type modeling is used, and in the second approach, layered-shell type modeling is used. The solid-shell and the layered-shell modeling approaches were used in progressive failure analyses (PFA) to determine the load, mode, and location of failure in the right rear lug under loading representative of an Airbus certification test conducted in 1985 (the 1985-certification test). Both analyses were in excellent agreement with each other on the predicted failure loads, failure mode, and location of failure. The solid-shell type modeling was then used to analyze both a subcomponent test conducted by Airbus in 2003 (the 2003-subcomponent test) and the accident condition. Excellent agreement was observed between the analyses and the observed failures in both cases. From the analyses conducted and presented in this paper, the following conclusions were drawn. The moment, Mx (moment about the fuselage longitudinal axis), has significant effect on the failure load of the lugs. Higher absolute values of Mx give lower failure loads. The predicted load, mode, and location of the failure of the 1985-certification test, 2003-subcomponent test, and the accident condition are in very good agreement. This agreement suggests that the 1985-certification and 2003- subcomponent tests represent the accident condition accurately. The failure mode of the right rear lug for the 1985-certification test, 2003-subcomponent test, and the accident load case is identified as a

  9. Structural Analysis of the Right Rear Lug of American Airlines Flight 587

    NASA Technical Reports Server (NTRS)

    Raju, Ivatury S.; Glaessgen, Edward H.; Mason, Brian H.; Krishnamurthy, Thiagarajan; Davila, Carlos G.

    2006-01-01

    A detailed finite element analysis of the right rear lug of the American Airlines Flight 587 - Airbus A300-600R was performed as part of the National Transportation Safety Board s failure investigation of the accident that occurred on November 12, 2001. The loads experienced by the right rear lug are evaluated using global models of the vertical tail, local models near the right rear lug, and a global-local analysis procedure. The right rear lug was analyzed using two modeling approaches. In the first approach, solid-shell type modeling is used, and in the second approach, layered-shell type modeling is used. The solid-shell and the layered-shell modeling approaches were used in progressive failure analyses (PFA) to determine the load, mode, and location of failure in the right rear lug under loading representative of an Airbus certification test conducted in 1985 (the 1985-certification test). Both analyses were in excellent agreement with each other on the predicted failure loads, failure mode, and location of failure. The solid-shell type modeling was then used to analyze both a subcomponent test conducted by Airbus in 2003 (the 2003-subcomponent test) and the accident condition. Excellent agreement was observed between the analyses and the observed failures in both cases. The moment, Mx (moment about the fuselage longitudinal axis), has significant effect on the failure load of the lugs. Higher absolute values of Mx give lower failure loads. The predicted load, mode, and location of the failure of the 1985- certification test, 2003-subcomponent test, and the accident condition are in very good agreement. This agreement suggests that the 1985-certification and 2003-subcomponent tests represent the accident condition accurately. The failure mode of the right rear lug for the 1985-certification test, 2003-subcomponent test, and the accident load case is identified as a cleavage-type failure. For the accident case, the predicted failure load for the right rear lug

  10. The role of residual (undegassed) and environmental waters in pyroclastic volcanic glass in nature and experiments (Invited)

    NASA Astrophysics Data System (ADS)

    Bindeman, I. N.; Seligman, A. N.; Nolan, G. S.; Lundstrom, C.; Martin, E.; Lowenstern, J. B.; Palandri, J. L.

    2013-12-01

    by the scanning FTIR technique. 7) Thermal diffusion experiments achieve up to a 144‰ range in δD across a 300-600°C temperature change; this has implications for explaining natural variations in δD in high temperature environments due to high diffusivity of hydrogen. 8) We report results of δ18O in extracted water in glass and discuss isotopic offsets due to incomplete oxygen extraction from OH groups. 9) We apply these methods to submarine glasses, and degassing tephra products of the same eruption.

  11. 76 FR 5507 - Airworthiness Directives; Airbus Model A300 B4-601, B4-603, B4-605R, C4-605R Variant F, and F4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-01

    ...-80C2 forward engine mounts (skinny cast yoke) does not meet the Design Service Goal (DSG) requirements... forward engine mount. * * * * * The unsafe condition is possible separation of the engine from the engine... that, among the types of yokes in service, one component on the CF6-80C2 forward engine mounts (skinny...

  12. 75 FR 74610 - Airworthiness Directives; Airbus Model A300 B2-1C, B2K-3C, B2-203, B4-2C, B4-103, and B4-203...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-01

    ...] attachment fitting lower flanges, DGAC [Direction G[eacute]n[eacute]rale de l'Aviation Civile] France AD 2003... [right-hand] and LH [left-hand] attachment fitting lower flanges, DGAC [Direction G[eacute]n[eacute]rale...-57A6101. This AD is revised to introduce an optional terminating action which consists of spot-facing the...

  13. 76 FR 24356 - Airworthiness Directives; Airbus Model A300 B4-601, B4-603, B4-605R, C4-605R Variant F, and F4...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-02

    ... specified products. The MCAI states: Airbus, in the frame of the Extended Service Goal (ESG) exercise, has...) states: Airbus, in the frame of the Extended Service Goal (ESG) exercise, has demonstrated by post... aviation product. The MCAI describes the unsafe condition as: Airbus, in the frame of the Extended Service...

  14. 75 FR 23572 - Airworthiness Directives; Airbus Model A300 B2-1C, B2-203, B2K-3C, B4-103, B4-203, B4-2C...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-04

    ... cycles 6,700 flight 80A3 or Pratt & Whitney engines. flight cycles \\1\\. flight cycles or \\2\\. cycles or...-200 airplanes with GE CF6- 18,000 total 19,500 total 250 flight cycles 5,800 flight 80C2 engines... flight cycles 6,700 flight Pratt & Whitney JT9D engines. flight cycles \\1\\. flight cycles or \\2\\. cycles...

  15. 75 FR 16657 - Airworthiness Directives; Airbus Model A300 B2-1C, B2K-3C, B2-203, B4-2C, B4-103, and B4-203...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-02

    ... phasing inspections and magnetic plug inspections for metal particles on the drain plug using detailed... inspections and magnetic plug inspections for metal particles on the drain plug using detailed inspection..., but the magnetic plug inspection reveals metal particles with dimensions greater than 1.5 mm (0.059 in...

  16. 78 FR 14162 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-05

    ... Airbus Model A310-203, -204, -222, -304, -322, and -324 airplanes. This AD was prompted by a design... Airbus Model A310-203, -204, -222, -304, - 322, and -324 airplanes, certificated in any category...

  17. 77 FR 25930 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-02

    ...-2098, dated July 22, 2011; and Mandatory Service Bulletin A310-57-2099, dated July 22, 2011. The... A310-57-2099, dated July 22, 2011. (ii) If no cracking is found during the inspection required by... accordance with Accomplishment Instructions of Airbus Mandatory Service Bulletin A310-57-2099, dated July 22...

  18. 78 FR 14647 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... (AD) for certain Airbus Model A310-204, -222, -304, -322, and -324 airplanes. This AD was prompted by... the Airbus A310 Airworthiness Limitation Section (ALS) Part 1 and bolts must be replaced at or before...

  19. 77 FR 69391 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-19

    ... Left Hand (LH) and Right Hand (RH) wings, and --For A310-300 and A310-200 aeroplanes that incorporate... A57844391200 at the slat 2 track 5 position, on both LH and RH wings. The unsafe condition is fatigue cracking..., describes the authority of the FAA Administrator. ``Subtitle VII: Aviation Programs,'' describes in more...

  20. Line Pilots' Attitudes about and Experience with Flight Deck Automation: Results of an International Survey and Proposed Guidelines

    NASA Technical Reports Server (NTRS)

    Rudisill, Marianne

    1995-01-01

    A survey of line pilots' attitudes about flight deck automation was conducted by the Royal Air Force Institute of Aviation Medicine (RAF IAM, Farnborough, UK) under the sponsorship of the United Kingdom s Civil Aviation Authority and in cooperation with IATA (the International Air Transport Association). Survey freehand comments given by pilots operating 13 types of commercial transports across five manufacturers (Airbus, Boeing, British Aerospace, Lockheed, and McDonnell-Douglas) and 57 air carriers/organizations were analyzed by NASA. These data provide a "lessons learned" knowledge base which may be used for the definition of guidelines for flight deck automation and its associated crew interface within the High Speed Research Program. The aircraft chosen for analysis represented a progression of levels of automation sophistication and complexity, from "Basic" types (e.g., B727, DC9), through "Transition" types (e.g., A300, Concorde), to two levels of glass cockpits (e.g., Glass 1: e.g., A310; Glass 2: e.g., B747-400). This paper reports the results of analyses of comments from pilots flying commercial transport types having the highest level of automation sophistication (B757/B767, B747-400, and A320). Comments were decomposed into five categories relating to: (1) general observations with regard to flight deck automation; comments concerning the (2) design and (3) crew understanding of automation and the crew interface; (4) crew operations with automation; and (5) personal factors affecting crew/automation interaction. The goal of these analyses is to contribute to the definition of guidelines which may be used during design of future aircraft flight decks.

  1. Laboratory measurements for the wavelength dependence of the linear polarization with the PROGRA2 instruments

    NASA Astrophysics Data System (ADS)

    Renard, Jean-Baptiste; Hadamcik, Edith; Levasseur-Regourd, Anny-Chantal; Carrasco, Nathalie; Couté, Benoit; Duverger, Vincent; Guerrini, Vincent

    2017-04-01

    Clouds of solid particles are present in many regions of the Solar System (comets, interplanetary dust cloud, planetary atmospheres). These clouds can be remotely studied by the light they scatter. There is a need for a data base of the light scattered by a large variety of samples at different wavelengths to interpret such measurements. The PROGRA2 instruments are used for this purpose. The PROGRA2 instruments, PROGRA2-VIS and PROGRA2-IR, are imaging polarimeters with a rotating arm to change the phase angle (angle between directions of illumination and observation). They allow to retrieve the complete polarization phase function between 10° and 165°. The light sources are at around 550 and 650 nm for PROGRA2-VIS, and 1000 and 1500 nm for PROGRA2-IR. The detectors are cameras, with a spatial resolution between 20 and 40 micrometers per pixel (PROGRA2-IR uses now new high sensitivity cameras). Measurements are conducted in the laboratory by an air draught technique for grains smaller than about 20 micrometers (which can be included in porous aggregates), and during parabolic flights on-board the A300 ZeroG and now the A310 ZeroG for larger grains; these flights campaigns are funded by the French and European Space Agencies. Hundreds of scattering phase functions have been obtained since 20 years, for a large number of samples (sands, silicon carbide, basalt, volcanic ashes, lunar and Martian simulants, tholins, meteoritic material, black carbon, carbonaceous compounds, …); the main results are available at www.icare.univ-lille1.fr/progra2/. Several samples have been already studied by the two instruments, showing a large diversity of wavelength dependences, from close-to-zero dependence for yellow and ocher sand grains to high dependence for silicon carbide and anthracite grains. These variations should be related to the wavelength dependence of the real and imaginary parts of the refractive index of the particles. We present a summary of the main results of

  2. 78 FR 42038 - Privacy Act New System of Records

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-15

    ... A300, Room A326, 1401 Constitution Avenue NW., Washington, DC 20230, 202-482-3258. FOR FURTHER INFORMATION CONTACT: Brenda Dolan, U.S. Department of Commerce, Suite A300, Room A326, 1401 Constitution Ave...

  3. 78 FR 8054 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-05

    ..., dated March 5, 1990) has not been done as of August 31, 2004 (the effective date of AD 2004-15-07... A310 series airplanes. The existing AD currently requires repetitive inspections for fatigue cracking... fatigue threshold and inspection interval resulted in a determination that reduced inspection thresholds...

  4. 77 FR 66762 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ...-1159; Directorate Identifier 2012-NM-028-AD] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes...: We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A310-203, -204, -222... information identified in this proposed AD, contact Airbus SAS--EAW (Airworthiness Office), 1 Rond Point...

  5. U.S. - UK - Canada Trilateral Symposium

    DTIC Science & Technology

    2009-10-02

    e . 4. Procedures for intra-community arms transfers simplified. 5 Retransfer controls disco raged b t m st be. u u u complied with. Li d...IRIS – T • Airbus A310 refueller 10 FUTURE OF TRANSATLANTIC ARMAMENTS COOPERATION 1996 VISION – “I believe that national security – ours and that

  6. 78 FR 7261 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-01

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... Airbus Model A310-203 airplanes. This AD was prompted by a report of an analysis that demonstrated a...-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057-3356; telephone (425...

  7. Maximized Gust Loads of a Closed-Loop, Nonlinear Aeroelastic System Using Nonlinear Systems Theory

    NASA Technical Reports Server (NTRS)

    Silva, Walter A.

    1999-01-01

    The problem of computing the maximized gust load for a nonlinear, closed-loop aeroelastic aircraft is discusses. The Volterra theory of nonlinear systems is applied in order to define a linearized system that provides a bounds on the response of the nonlinear system of interest. The method is applied to a simplified model of an Airbus A310.

  8. Management Guide to a Competency-Based Adult Education Program for Administrators, Counselors, Teachers. 1984-1985.

    ERIC Educational Resources Information Center

    Brevard Community Coll., Cocoa, FL.

    A 310 Special Demonstration Project was conducted in Florida to create a model of competency-based adult education (CBAE) based on the programs currently in existence. This manual, which was produced through the project, presents an overview of CBAE and explains in detail how to operate a CBAE program. The manual is organized in 11 sections. The…

  9. Competency-Based Adult Education: A Guide to Classroom Management.

    ERIC Educational Resources Information Center

    Guglielmino, Lucy M.; And Others

    Developed as part of a 310 Special Demonstration and Teacher Training Project undertaken at Brevard Community College in 1984-85, this training guide for new Competency-Based Adult Education (CBAE) teachers offers information on the CBAE concept, individualized instruction, selection of instructional materials, student orientation, and procedures.…

  10. 77 FR 26937 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-08

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of...) for certain Airbus Model A300 B2-1C, B2K-3C, B2-203, B4-2C, B4-103, and B4-203 airplanes; and Model... Airbus Service Bulletins (SB) A300-57-0235 and A300-57-6088 * * *. Subsequently, new cases of cracks were...

  11. 77 FR 24137 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-23

    ... Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule... Register. That AD applies to all Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, Model... Airbus Model A300 B4-600, B4- 600R, and F4-600R series airplanes, Model A300 C4-605R Variant F airplanes...

  12. Numerical simulation of mechanical mixing in high solid anaerobic digester.

    PubMed

    Yu, Liang; Ma, Jingwei; Chen, Shulin

    2011-01-01

    Computational fluid dynamics (CFD) was employed to study mixing performance in high solid anaerobic digester (HSAD) with A-310 impeller and helical ribbon. A mathematical model was constructed to assess flow fields. Good agreement of the model results with experimental data was obtained for the A-310 impeller. A systematic comparison for the interrelationship of power number, flow number and Reynolds number was simulated in a digester with less than 5% TS and 10% TS (total solids). The simulation results suggested a great potential for using the helical ribbon mixer in the mixing of high solids digester. The results also provided quantitative confirmation for minimum power consumption in HSAD and the effect of share rate on bio-structure. Copyright © 2010 Elsevier Ltd. All rights reserved.

  13. West Europe Report, Science and Technology

    DTIC Science & Technology

    1986-03-27

    exemption of employee shares), the French system does not sufficiently encourage creation and development of companies which depend on the often...pharmaceutical industry because with good reason the multina- tional chemical companies are investing millions in this area. The effects upon the...build upon knowledge gained from the high- performance wings of the Airbus A310 and Airbus A320. The com- pany considers that here systems of

  14. 78 FR 9581 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F...-03-11 Airbus: Amendment 39-17346. Docket No. FAA-2012-1002; Directorate Identifier 2012-NM-052-AD. (a...

  15. 77 FR 51717 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-27

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of... applies to certain Airbus Model A300 B4-2C, B4-103, and B4- 203 airplanes; and Model A300 B4-601, B4-603... information identified in this proposed AD, contact Airbus SAS--EAW (Airworthiness Office), 1 Rond Point...

  16. 77 FR 40485 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-10

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... (AD) for all Airbus Model A300 series airplanes; all Model A300 B4-600, B4-600R, and F4-600R series... new AD: 2012-13-06 Airbus: Amendment 39-17108. Docket No. FAA-2012-0040; Directorate Identifier 2011...

  17. 78 FR 32345 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-30

    ... Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for all Airbus Model A300... FedEx requested that copies of Airbus Service Bulletin A300-53- 6170, dated May 16, 2011, be provided...

  18. 78 FR 70003 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-22

    ... Airworthiness Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 series airplanes; Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model...

  19. 14 CFR 91.1505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... A300 (excluding the -600 series), the flight cycle implementation time is: (i) Model B2: 36,000 flights... operate an Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model... Lockheed Model L-1011 airplane beyond applicable flight cycle implementation time specified below, or May...

  20. Laser Intensity Scaling Through Stimulated Scattering in Optical Fibers

    DTIC Science & Technology

    2001-12-17

    Stokes beams transmitted through a 300 m multimode fiber. ..................................127 Figure 58: Circles (squares) indicate the measured size...circles) and first order Stokes (squares) beams at the fiber facet. (b,c) Pump (left) and Stokes (right) intensity distributions for a 300 m and...75 m fiber respectively. .......................................................................................130 Figure 61: Double clad fiber

  1. 14 CFR 125.505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... operate an Airbus Model A300 (exlcuding the -600 series), British Aerospace Model BAC 1-11, Boeing Model...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  2. 14 CFR 121.1107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  3. 14 CFR 129.107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Model A300 (excluding −600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720, 727, 737... all models of the British Aerospace BAC 1-11, the flight cycle implementation time is 60,000 flights...

  4. 14 CFR 125.505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... operate an Airbus Model A300 (exlcuding the -600 series), British Aerospace Model BAC 1-11, Boeing Model...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  5. 14 CFR 129.107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Model A300 (excluding −600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720, 727, 737... all models of the British Aerospace BAC 1-11, the flight cycle implementation time is 60,000 flights...

  6. 14 CFR 129.107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Model A300 (excluding −600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720, 727, 737... all models of the British Aerospace BAC 1-11, the flight cycle implementation time is 60,000 flights...

  7. 14 CFR 91.1505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... operate an Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model... below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight cycle...

  8. 14 CFR 91.1505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... operate an Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model... below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight cycle...

  9. 14 CFR 125.505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... operate an Airbus Model A300 (exlcuding the -600 series), British Aerospace Model BAC 1-11, Boeing Model...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  10. 14 CFR 121.1107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  11. 14 CFR 121.1107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  12. 14 CFR 129.107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Model A300 (excluding −600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720, 727, 737... all models of the British Aerospace BAC 1-11, the flight cycle implementation time is 60,000 flights...

  13. 14 CFR 91.1505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... operate an Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model... below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight cycle...

  14. 14 CFR 121.1107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Airbus Model A300 (excluding the -600 series), British Aerospace Model BAC 1-11, Boeing Model 707, 720...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  15. 14 CFR 125.505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... operate an Airbus Model A300 (exlcuding the -600 series), British Aerospace Model BAC 1-11, Boeing Model...,000 flights below the window line. (2) For all models of the British Aerospace BAC 1-11, the flight...

  16. 77 FR 60723 - Notice of Lodging of Proposed Consent Decree Under the Comprehensive Environmental Response...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-04

    ... Remediation, LLC (``Defendants''), under Nevada Water Pollution Control Law, NRS Sec. 445A.300 to 445A.730... of Redband Trout between the Owyhee River and upper Mill Creek; reclamation of soil and re-vegetation...

  17. 40 CFR 35.6015 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ..., repair, remodeling, improvement, or extension of buildings, structures or other property. Contract. A... 300. Operable unit. A discrete action, as described in the Cooperative Agreement or Superfund State...). Real property. Land, including land improvements, structures, and appurtenances thereto, excluding...

  18. 40 CFR 35.6015 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ..., repair, remodeling, improvement, or extension of buildings, structures or other property. Contract. A... 300. Operable unit. A discrete action, as described in the Cooperative Agreement or Superfund State...). Real property. Land, including land improvements, structures, and appurtenances thereto, excluding...

  19. 77 FR 75833 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-26

    ... accordance with Airbus SB A300-57-6053 (Mod. 10453). Therefore and pending completion of the full analysis using a refined Finite Element Model, EASA [European Aviation Safety Agency] issued AD 2009-0094 [which...

  20. 76 FR 79672 - Chitina Electric Inc.; Notice of Declaration of Intention and Soliciting Comments, Protests, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-22

    ..., protests, and/or motions filed. k. Description of Project: The proposed run-of-river Fivemile Creek...-foot-long powerhouse, containing a 300-kW pelton wheel turbine and electrical generating equipment; (3...

  1. Plasmodium Coatneyi Ring-Infected Erythrocyte Surface Antigens

    DTIC Science & Technology

    1993-01-01

    corresponding to the 3’ repeat sequence of P. during one or multiple infections, pooled sera falciparum RESA (a gift from Dr. Troye -Blom- from humans who had a...310: primte alaia delin hic an ntiodyre-789-792. primte alaia ode inwhic anantbod re 8.Kabilan L. Troye -Blomberg M, Patarroyo ME,sponse to RESA occurs...Diseases. Centers for Disease 9. Kabilan L. Troye -Blomberg M, Perlmann H. An- Control and Prevention, Atlanta. GA). We thank C. dersson G. Hogh B

  2. Psychiatric nurses' beliefs, attitudes, and perceived barriers about medical emergency teams.

    PubMed

    Herisko, Camellia; Puskar, Kathryn; Mitchell, Ann M

    2013-10-01

    A literature review of nurses' attitudes, beliefs, and barriers regarding the medical emergency team (MET) process is limited to medical hospitals. How psychiatric nurses view the MET process and their prior experiences with METs are important because they are often the ones assessing the need for, and then calling, the MET. This article examines psychiatric nurses' attitudes, beliefs, and barriers toward the MET process in a 310-bed psychiatric hospital that is part of an urban academic medical center. Through the use of key informant interviews, nurses were asked for their feedback and input regarding the current MET practices. The results may be useful in improving the current operating system.

  3. Aerodynamics on a transport aircraft type wing-body model

    NASA Technical Reports Server (NTRS)

    Schmitt, V.

    1982-01-01

    The DFLR-F4 wing-body combination is studied. The 1/38 model is formed by a 9.5 aspect ratio transonic wing and an Airbus A 310 fuselage. The F4 wing geometrical characteristics are described and the main experimental results obtained in the S2MA wind tunnel are discussed. Both wing-fuselage interferences and viscous effects, which are important on the wing due to a high rear loading, are investigated by performing 3D calculations. An attempt is made to find their limitations.

  4. The use of graphs in the ergonomic evaluation of tall pilots' sitting posture.

    PubMed

    de Ree, J J

    1989-10-01

    A survey has shown that the average height of KLM pilots has increased by 18 mm (0.7 in) per decade in the last 20 years. Around 6% are taller than 1905 mm (75.0 in), the upper limit of pilot height for flight deck design. With the use of graphs of the flight deck, we established that the main problem of tall pilots is insufficient legroom. Of all KLM/NLM aircraft types, the Boeing 747-200/300 and the Douglas DC-9 are most uncomfortable for pilots taller than 1960 mm (77.2 in). In the Airbus A310, pilots of 2000 mm (78.7 in) have insufficient legroom. The other aircraft types do not present difficulties for pilots up to 2030 mm (79.9 in). Ergonomic adaptations on the flight decks of the Boeing 747-200/300 and the Airbus A310 are necessary to alleviate the problems of tall pilots. Future aircraft types should be designed to accommodate tall pilots. If ergonomic adaptation of the flight deck is impossible, anthropometric limits for pilot selection have to be employed.

  5. High-voltage terminal test of a test stand for a 1-MV electrostatic accelerator

    NASA Astrophysics Data System (ADS)

    Park, Sae-Hoon; Kim, Yu-Seok

    2015-10-01

    The Korea Multipurpose Accelerator Complex has been developing a 300-kV test stand for a 1-MV electrostatic accelerator ion source. The ion source and accelerating tube will be installed in a high-pressure vessel. The ion source in the high-pressure vessel is required to have a high reliability. The test stand has been proposed and developed to confirm the stable operating conditions of the ion source. The ion source will be tested at the test stand to verify the long-time operating conditions. The test stand comprises a 300-kV high-voltage terminal, a battery for the ion-source power, a 60-Hz inverter, 200-MHz radio-frequency power supply, a 5-kV extraction power supply, a 300-kV accelerating tube, and a vacuum system. The results of the 300-kV high-voltage terminal tests are presented in this paper.

  6. Evaluation of Advanced Microwave Landing System Procedures in the New York Terminal Area

    DTIC Science & Technology

    1991-03-01

    sector controller called the CAMRN sector who must then sequence that traffic with multiple feeders from the south before handing off to the final...Right (13R) were all being used by landing traffic, the final controller handled the runway 22 arrivals and the CAMRN controller handled the runway 13R...Feeder Fix AAL678 DC10 H 00:09:00 AAL68 B767 H 00:23:00 AAL588 A300 H 00:27:00 PAA224 A300 H 01:20:00 4/ TWAll L101 H 01:34:00 CAMRN Feeder Fix DAL144

  7. A Potential Pitfall in the Use of the Monorail System for Carotid Stenting

    PubMed Central

    Pereira, E.; Birnbaum, L.

    2006-01-01

    Summary The use of EPDs seems to be necessary for safe CAS. Though the monorail system may offer advantages for a single operator, we caution its use with certain aortic arch anatomies. In such anatomies, using an OTW system or at least a 300 cm filter wire or devices that support wire extension will remedy some complications, such as the loss of the guiding sheath. As in our case, the added advantage of a 300 cm filter wire enabled us to avoid a poor outcome or an emergency vascular surgery. PMID:20569594

  8. A potential pitfall in the use of the monorail system for carotid stenting. A technical case report.

    PubMed

    Pereira, E; Birnbaum, L

    2006-12-15

    The use of EPDs seems to be necessary for safe CAS. Though the monorail system may offer advantages for a single operator, we caution its use with certain aortic arch anatomies. In such anatomies, using an OTW system or at least a 300 cm filter wire or devices that support wire extension will remedy some complications, such as the loss of the guiding sheath. As in our case, the added advantage of a 300 cm filter wire enabled us to avoid a poor outcome or an emergency vascular surgery.

  9. Perception of time in microgravity and hypergravity during parabolic flight.

    PubMed

    Clément, Gilles

    2018-03-07

    We explored the effect of gravity on the accuracy for estimating durations of 3.5, 7, and 14 s. Experiments were performed on board an Airbus A310 during parabolic flights eliciting repeated exposures to short periods of 0, 1, and 1.8 g. Two methods for obtaining duration estimates were used, reproduction and production of duration, in two conditions: a control counting condition and a concurrent reading condition. Simple reaction times were also measured to assess attention. The results showed that the temporal accuracies during the reproduction task in the concurrent reading condition were significantly underestimated in 0 g compared with 1 g. Reaction times were also longer in 0 g. However, there was no difference in duration estimates in the production tasks. These results suggest that the temporal underestimation in 0 g is caused by decreased selective attention and impaired retrieval of information in episodic memory.

  10. Design and construction of a time-of-flight wall detector at External Target Facility of HIRFL-CSR

    NASA Astrophysics Data System (ADS)

    Sun, Y.; Sun, Z. Y.; Yu, Y. H.; Yan, D.; Tang, S. W.; Sun, Y. Z.; Wang, S. T.; Zhang, X. H.; Yue, K.; Fang, F.; Chen, J. L.; Zhang, Y. J.; Hu, B. T.

    2018-06-01

    A Time-Of-Flight Wall (TOFW) detector has been designed and constructed at the External Target Facility (ETF) of HIRFL-CSR. The detector covers a sensitive area of 1.2 × 1.2 m2 and consists of 30 modules. Each module is composed of a long plastic scintillator bar with two photo-multiplier tubes coupled at both ends for readout. The design and manufacture details are described and the test results are reported. The performance of the TOFW detector has been tested and measured with cosmic rays and a 310 MeV/u 40Ar beam. The results show that the time resolutions of all the TOFW modules are better than 128 ps, satisfying the requirements of the experiments which will be carried out at the ETF.

  11. Jefferson Lab 12 GEV Cebaf Upgrade

    NASA Astrophysics Data System (ADS)

    Rode, C. H.

    2010-04-01

    The existing continuous electron beam accelerator facility (CEBAF) at Thomas Jefferson National Accelerator Facility (TJNAF) is a 5-pass, recirculating cw electron Linac operating at ˜6 GeV and is devoted to basic research in nuclear physics. The 12 GeV CEBAF Upgrade is a 310 M project, sponsored by the Department of Energy (DOE) Office of Nuclear Physics, that will expand its research capabilities substantially by doubling the maximum energy and adding major new experimental apparatus. The project received construction approval in September 2008 and has started the major procurement process. The cryogenic aspects of the 12 GeV CEBAF Upgrade includes: doubling the accelerating voltages of the Linacs by adding ten new high-performance, superconducting radiofrequency (SRF) cryomodules (CMs) to the existing 42 1/4 cryomodules; doubling of the 2 K cryogenics plant; and the addition of eight superconducting magnets.

  12. An engineering evaluation of the Space Shuttle OMS engine after 5 orbital flights

    NASA Technical Reports Server (NTRS)

    David, D.

    1983-01-01

    Design features, performances on the first five flights, and condition of the Shuttle OMS engines are summarized. The engines were designed to provide a vacuum-fed 6000 lb of thrust and a 310 sec specific impulse, fueled by a combination of N2O4 and monomethylhydrazine (MMH) at a mixture ratio of 1.65. The design lifetime is 1000 starts and 15 hr of cumulative firing duration. The engine assembly is throat gimballed and features yaw actuators. No degradation of the hot components was observed during the first five flights, and the injector pattern maintained a uniform, enduring level of performance. An increase in the take-off loads have led to enhancing the wall thickness in the nozzle in affected areas. The engine is concluded to be performing to design specifications and is considered an operational system.

  13. Pulsed thrust measurements using electromagnetic calibration techniques

    SciTech Connect

    Tang Haibin; Shi Chenbo; Zhang Xin'ai

    2011-03-15

    A thrust stand for accurately measuring impulse bits, which ranged from 10-1000 {mu}N s using a noncontact electromagnetic calibration technique is described. In particular, a permanent magnet structure was designed to produce a uniform magnetic field, and a multiturn coil was made to produce a calibration force less than 10 mN. The electromagnetic calibration force for pulsed thrust measurements was linear to the coil current and changed less than 2.5% when the distance between the coil and magnet changed 6 mm. A pulsed plasma thruster was first tested on the thrust stand, and afterward five single impulse bits were measuredmore » to give a 310 {mu}N s average impulse bit. Uncertainty of the measured impulse bit was analyzed to evaluate the quality of the measurement and was found to be 10 {mu}N s with 95% credibility.« less

  14. [Study of the strength of compacts of mixed dry binders consisting of powdered cellulose and directly compressible lactose].

    PubMed

    Muzíková, J; Hájková, P; Vinklarová, S

    2004-07-01

    The paper studied the strength of compacts of dry binders consisting of powdered cellulose and directly compressible lactose. The powdered cellulose employed was Arbocel A300, the directly compressible lactose, Pharmatosa DCL 21. The first step of the evaluation comprised the tensile strength of compacts and sensitivity of dry binders alone to an addition of magnesium stearate. The same method of evaluation was then used for mixed dry binders from Arbocel A300 and Pharmatosa DCL 21 in ratios of 3:1, 1:1 and 1:3. The tested concentrations of magnesium stearate were 0.4 and 0.8%. Sensitivity of dry binders to an addition of the lubricant was evaluated by means of lubricant sensitivity ratio (LSR) values. The compacts with the highest strength and at the same time the lowest sensitivity to an addition of magnesium stearate were produced using a mixture of Arbocel A300 and Pharmatosa DCL 21 in a ratio of 1:3. The evaluation also included the commercially produced mixed dry binder Cellactosa 80, in which higher sensitivity to an addition of stearate than in a mixture of Arbocel A300 and Pharmatosa DCL 21 in a ratio of 1:3 was found.

  15. Supra-Canonical Initial 26Al/27Al Indicate a 105 Year Residence Time for CAIs in the Solar Proto-Planetary Disk

    NASA Astrophysics Data System (ADS)

    Young, E. D.; Simon, J. I.; Galy, A.; Russell, S. S.; Tonui, E. K.; Lovera, O.

    2005-03-01

    We present new UV laser ablation and acid digestion MC-ICPMS analyses of 8 CAIs showing that there was more 26Al in the early solar system than previously thought, and that the canonical initial 26Al/27Al represents a ~300,000 yr residence time for CAIs in the protoplanetary disk.

  16. Services that Span the Autism Spectrum

    ERIC Educational Resources Information Center

    Secan, Kristin E.; Mason, Gwendolyn

    2013-01-01

    In 1980, Andrew Egel, then a young professor of special education at the University of Maryland, was elated to hear he had received a $300,000 grant from the National Institutes of Health to fund a model program in the public schools for children with autism. Reluctant at first, the Montgomery County Public Schools (MCPS) agreed to work with Egel…

  17. Farm Laboratory Aids Post-Secondary Instruction in Agricultural Production

    ERIC Educational Resources Information Center

    Statler, Larry L.; Juhl, R. J.

    1970-01-01

    Reports a farm laboratory of 1500 swine, 40 beef cattle, 52 sheep, a 300-crop acres, and a full line of leased new farm machinery for post-secondary agricultural production students. A student board of directors manages the demonstration farm. (DM)

  18. 77 FR 73343 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-10

    ...-1224; Directorate Identifier 2012-NM-112-AD] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes...: We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 B4-600, B4-600R, and... holidays. For Airbus service information identified in this proposed AD, contact Airbus SAS-EAW...

  19. 76 FR 62673 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ...-1066; Directorate Identifier 2011-NM-050-AD] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes...: We propose to adopt a new airworthiness directive (AD), for certain Airbus Model A300 B2-1C, B2K-3C... Friday, except Federal holidays. For service information identified in this proposed AD, contact Airbus...

  20. 77 FR 11793 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-28

    ...-0185; Directorate Identifier 2011-NM-001-AD] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes...: We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A300 B4-103, B4-203... Friday, except Federal holidays. For service information identified in this proposed AD, contact Airbus...

  1. 77 FR 59149 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-26

    ...-1002; Directorate Identifier 2012-NM-052-AD] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes...: We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A300 B4-600, B4-600R...: Airbus: Docket No. FAA-2012-1002; Directorate Identifier 2012-NM- 052-AD. (a) Comments Due Date We must...

  2. Counterfeit U.S. Currency Abroad: Issues and U.S. Deterrence Efforts.

    DTIC Science & Technology

    1996-02-01

    Treasury Department and Secret Service officials use counterfeit-detection data from the Secret Service to help assess the extent of counterfeiting. The ... Secret Service has also used these data to demonstrate significant increases in counterfeiting activity abroad, citing a 300-percent rise in detections in fiscal year 1993.

  3. Mechanical Milk: An Essay on the Social History of Infant Formula.

    ERIC Educational Resources Information Center

    Schwab, Michael G.

    1996-01-01

    Describes how infant formula became an "icon of modernity" separating mothers from babies and causing health and social problems. Gives a 300-year social history of the rise in popularity of infant formula, covering aspects including the body as machine, rise of science and industrialization, formula and public health, the clean milk…

  4. All Aboard the Internet. E to Go: The Internet in Your Pocket

    ERIC Educational Resources Information Center

    Descy, Don E.

    2006-01-01

    Some remember when they accessed the Internet through the telephone on a 300-baud modem. It was slow and it was not easy, but it gave them a view of the world. Now there is the web, idiot-proof email, and practically unlimited wireless connectivity. Having gone from desktop computers to laptops, now a major push is moving connectivity into the…

  5. 33 CFR 165.1712 - Safety Zones; Annual Independence Day Firework Displays, Skagway, Haines, and Wrangell, AK.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Day Firework Displays, Skagway, Haines, and Wrangell, AK. 165.1712 Section 165.1712 Navigation and... Displays, Skagway, Haines, and Wrangell, AK. (a) Regulated areas. The following areas are permanent safety..., Haines, AK within a 300-yard radius around the fireworks launch area, centered at approximate position 59...

  6. 33 CFR 165.1712 - Safety Zones; Annual Independence Day Firework Displays, Skagway, Haines, and Wrangell, AK.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Day Firework Displays, Skagway, Haines, and Wrangell, AK. 165.1712 Section 165.1712 Navigation and... Displays, Skagway, Haines, and Wrangell, AK. (a) Regulated areas. The following areas are permanent safety..., Haines, AK within a 300-yard radius around the fireworks launch area, centered at approximate position 59...

  7. 33 CFR 165.506 - Safety Zones; Fireworks Displays in the Fifth Coast Guard District.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Table to § 165.506 reference Datum NAD 1983. Table to § 165.506 No. Date Location Regulated area (a..., approximately 700 yards south of the waterfront at Southport, NC. 12. July 4th Big Foot Slough, Ocracoke, NC, Safety Zone All waters of Big Foot Slough within a 300 yard radius of the fireworks launch site in...

  8. 76 FR 47235 - Notice of Intent To Prepare an Environmental Impact Statement for the Proposed Stateline Solar...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-04

    ...) application for the Stateline Solar Farm (Stateline), a 300- Megawatt (MW) photovoltaic (PV) Solar electricity... authorization to construct, operate, maintain, and decommission the 300-MW PV Stateline solar energy project...] Notice of Intent To Prepare an Environmental Impact Statement for the Proposed Stateline Solar Farm, San...

  9. Swift fox survey along Heartland Expressway Corridor.

    DOT National Transportation Integrated Search

    2015-05-01

    The swift fox (Vulpes velox) is a small canid classified as endangered within the : state of Nebraska. Future construction of the Heartland Expressway Corridor (HEC), a : 300 km road expansion project in the panhandle of the state, may impact the res...

  10. Learning Pathways in Environmental Science Education: The Case of Hazardous Household Items

    ERIC Educational Resources Information Center

    Malandrakis, George N.

    2006-01-01

    The present study draws on environmental science education to explore aspects of children's conceptual change regarding hazardous household items. Twelve children from a fifth-grade class attended a 300-h teaching module of environmentally oriented science activities aimed at assessing their awareness about the environmental and health hazards…

  11. 29 CFR 1910.304 - Wiring design and protection.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... grounding-type receptacles. (v) Receptacles connected to circuits having different voltages, frequencies, or... poles shall provide a horizontal climbing space not less than the following: (i) Power conductors below communication conductors—762 mm (30 in.); (ii) Power conductors alone or above communication conductors: (A) 300...

  12. 29 CFR 1910.304 - Wiring design and protection.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... grounding-type receptacles. (v) Receptacles connected to circuits having different voltages, frequencies, or... poles shall provide a horizontal climbing space not less than the following: (i) Power conductors below communication conductors—762 mm (30 in.); (ii) Power conductors alone or above communication conductors: (A) 300...

  13. 29 CFR 1910.304 - Wiring design and protection.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... grounding-type receptacles. (v) Receptacles connected to circuits having different voltages, frequencies, or... poles shall provide a horizontal climbing space not less than the following: (i) Power conductors below communication conductors—762 mm (30 in.); (ii) Power conductors alone or above communication conductors: (A) 300...

  14. 29 CFR 1910.304 - Wiring design and protection.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... grounding-type receptacles. (v) Receptacles connected to circuits having different voltages, frequencies, or... poles shall provide a horizontal climbing space not less than the following: (i) Power conductors below communication conductors—762 mm (30 in.); (ii) Power conductors alone or above communication conductors: (A) 300...

  15. 29 CFR 1910.304 - Wiring design and protection.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... grounding-type receptacles. (v) Receptacles connected to circuits having different voltages, frequencies, or... poles shall provide a horizontal climbing space not less than the following: (i) Power conductors below communication conductors—762 mm (30 in.); (ii) Power conductors alone or above communication conductors: (A) 300...

  16. Suppression of cucumber powdery mildew by UV-B is affected by background light quality

    USDA-ARS?s Scientific Manuscript database

    Brief (5-10 min) exposure to UV-B radiation (280-300 nm) suppressed powdery mildew (Podosphaera xanthii) on Cucumis sativus. The effect was enhanced by red light (600-660 nm), but offset by blue light (420-500 nm) and UV-A (300-420 nm). Compared to untreated controls, 2 h red light from specific lig...

  17. A Model for Teaching Large Classes: Facilitating a "Small Class Feel"

    ERIC Educational Resources Information Center

    Lynch, Rosealie P.; Pappas, Eric

    2017-01-01

    This paper presents a model for teaching large classes that facilitates a "small class feel" to counteract the distance, anonymity, and formality that often characterize large lecture-style courses in higher education. One author (E. P.) has been teaching a 300-student general education critical thinking course for ten years, and the…

  18. 33 CFR 110.77 - Amistad Reservoir, Tex.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Amistad Reservoir, Tex. 110.77... ANCHORAGE REGULATIONS Special Anchorage Areas § 110.77 Amistad Reservoir, Tex. (a) Diablo East, Tex. That portion of the Amistad Reservoir enclosed by a line connecting the following points, excluding a 300-foot...

  19. Evolution in the Classroom: What Teachers Need to Know about the Video Game Generation

    ERIC Educational Resources Information Center

    Simpson, Elizabeth S.

    2005-01-01

    Research driving the mandates of the current education reform law, No Child Left Behind, indicates a 300% increase during the last 10 years in students being labeled with specific learning disabilities. In addition there has been a dramatic increase in the number of minority students labeled as having learning and emotional disabilities (U.S.…

  20. The Archean crust in the Wawa-Chapleau-Timmins region. A field guidebook prepared for the 1983 Archean Geochemistry-Early Crustal Genesis Field Conference

    NASA Technical Reports Server (NTRS)

    Percival, J. A.; Card, K. D.; Sage, R. P.; Jensen, L. S.; Luhta, L. E.

    1983-01-01

    This guidebook describes the characteristics and interrelationships of Archean greenstone-granite and high-grade gneiss terrains of the Superior Province. A 300-km long west to east transect between Wawa and Timmins, Ontario will be used to illustrate regional-scale relationships. The major geological features of the Superior Province are described.

  1. 78 FR 41285 - Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-10

    ... manual). The limitations were revised to include an emergency fuel control system adjustment test. We are... a 300 Flight Hour (FH) hour inspection on the Emergency Fuel Control System (FCS). For the reason...., maintenance manual). The limitations were revised to include an emergency fuel control system adjustment test...

  2. The invasion of southern forests by nonnative plants: current and future occupation, with impacts, management strategies, and mitigation approaches

    Treesearch

    James H. Miller; Dawn Lemke; John Coulston

    2013-01-01

    Key FindingsInvasive plants continue to escape into and spread through southern forests to eventually form exclusive infestations, and replace native communities to the detriment of forest productivity, biodiversity, ecosystem services, and human use potential.Over a 300-year period, invasive plants have been increasingly...

  3. Effects of Palagonitic Dust Coatings on Thermal Emission Spectra of Rocks and Minerals: Implications for Mineralogical Characterization of the Martian Surface by MGS-TES

    NASA Technical Reports Server (NTRS)

    Graff, T. G.; Morris, R.; Christensen, P.

    2001-01-01

    Thermal emission measurements on dust-coated rocks and minerals show that a 300 5m thick layer is required to mask emission from the substrate and that non-linear effects are present. Additional information is contained in the original extended abstract.

  4. Effects of Palagonitic Dust Coatings on Visible, Near-IR, and Mossbauer Spectra of Rocks and Minerals: Implication for Mineralogical Remote Sensing of Mars

    NASA Technical Reports Server (NTRS)

    Morris, R.; Graff, T. G.; Shelfer, T. D.; Bell, J. F., III

    2001-01-01

    Visible, near-IR, and Mossbauer measurements on dust coated rocks and minerals show that a 300 5m thick layer is required to obscure the substrate for VNIR measurements and that a greater than 2000-micron-thick layer is required to obscure the substrate for Mossbauer measurements. Additional information is contained in the original extended abstract.

  5. 50 CFR 300.63 - Catch sharing plan and domestic management measures in Area 2A.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... fisheries in Area 2A: (i) The sport fishery under section 26 of the annual domestic management measures and... management measures and IPHC regulations. (2) No person shall fish for halibut in the sport fishery in Area... management measures in Area 2A. 300.63 Section 300.63 Wildlife and Fisheries INTERNATIONAL FISHING AND...

  6. 50 CFR 300.63 - Catch sharing plan and domestic management measures in Area 2A.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... fisheries in Area 2A: (i) The sport fishery under section 26 of the annual domestic management measures and... management measures and IPHC regulations. (2) No person shall fish for halibut in the sport fishery in Area... management measures in Area 2A. 300.63 Section 300.63 Wildlife and Fisheries INTERNATIONAL FISHING AND...

  7. 50 CFR 300.63 - Catch sharing plan and domestic management measures in Area 2A.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... fisheries in Area 2A: (i) The sport fishery under section 26 of the annual domestic management measures and... management measures and IPHC regulations. (2) No person shall fish for halibut in the sport fishery in Area... management measures in Area 2A. 300.63 Section 300.63 Wildlife and Fisheries INTERNATIONAL FISHING AND...

  8. 300-Watt Power Source Development at the Jet Propulsion Laboratory

    NASA Technical Reports Server (NTRS)

    Valdez, Thomas I.

    2005-01-01

    This viewgraph presentation reviews the JPL program to develop a 300 Watt direct methanol fuel cell. The immediate use of the fuel cell is to power test instrumentation on armored vehicles. It reviews the challenges, the system design and the system demonstration.

  9. STUDY OF BUS TRANSPORTATION FOR RELIEF OF OVERCROWDEDNESS IN THE ST. LOUIS SCHOOLS.

    ERIC Educational Resources Information Center

    Saint Louis Board of Education, MO.

    PRESENTED IS A REPORT ON WHAT ST. LOUIS, MISSOURI, AND 15 OTHER CITIES HAVING MORE THAN A 300,000 POPULATION ARE DOING WITH RESPECT TO THE USE OF BUS TRANSPORTATION IN RELIEVING OVERCROWDEDNESS RELATIVE TO THE PROCESS OF DESEGREGATION AND INTEGRATION OF THE PUBLIC SCHOOLS. THE REPORT CONTAINS FOUR SECTIONS--(1) BRIEF OVERVIEW OF THE PROBLEM OF BUS…

  10. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... to establish wide-band systems using frequency-hopping spread spectrum techniques in the 960-1215 MHz... spectrum uniformly across the band; (2) The radiated pulse varies from the specified width of 6.4... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited from...

  11. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... to establish wide-band systems using frequency-hopping spread spectrum techniques in the 960-1215 MHz... spectrum uniformly across the band; (2) The radiated pulse varies from the specified width of 6.4... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited from...

  12. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... to establish wide-band systems using frequency-hopping spread spectrum techniques in the 960-1215 MHz... spectrum uniformly across the band; (2) The radiated pulse varies from the specified width of 6.4... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited from...

  13. UKRAINIAN MULTI-FUEL REBURN DEMO

    EPA Science Inventory

    This research demonstrates a multi-fuel reburning system to allow the use of natural gas, fuel oil, or pulverized coal as the reburn fuel on a 300 MW wall-fired, we-bottom boiler in the Ukraine. The ability to use more than one fuel is critical to the success of reburning as a N...

  14. Exploring Symbolic Competence: Constructing Meaning(s) and Stretching Cultural Imagination in an Intermediate College-Level French Class

    ERIC Educational Resources Information Center

    Étienne, Corinne; Vanbaelen, Sylvie

    2017-01-01

    This study, conducted in a 300-level college French class with 15 students, builds on previous research on symbolic competence (Kramsch, 2009, 2011). Using a film scene and a "Semiotic Gap Activity," we examine how students construct meaning. What do students prioritize? What do they bring from their past symbolic representations? Are…

  15. 78 FR 71639 - Final Environmental Impact Statement for the Soboba Band of Luiseno Indians' Proposed 534-Acre...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-29

    ... Action also includes the development of a 300-room hotel, casino, restaurants, retail establishments, a... addressed within the FEIS included land resources, water resources, air quality, biological resources..., Chief of the Division of Environmental, Cultural Resources Management and Safety, at the address listed...

  16. Nuclear reactor power as applied to a space-based radar mission

    NASA Technical Reports Server (NTRS)

    Jaffe, L.; Beatty, R.; Bhandari, P.; Chow, E.; Deininger, W.; Ewell, R.; Fujita, T.; Grossman, M.; Bloomfield, H.; Heller, J.

    1988-01-01

    A space-based radar mission and spacecraft are examined to determine system requirements for a 300 kWe space nuclear reactor power system. The spacecraft configuration and its orbit, launch vehicle, and propulsion are described. Mission profiles are addressed, and storage in assembly orbit is considered. Dynamics and attitude control and the problems of nuclear and thermal radiation are examined.

  17. The distribution of tree roots in Douglas-fir forests in the Pacific Northwest in relation to depth, space, coarse organic matter and mineral fragments.

    Treesearch

    Constance A. Harrington; Scott M. Holub; Cici Bauer; E. Ashley Steel

    2017-01-01

    This study evaluated relationships between site or tree characteristics and below-ground materials in Douglas-fir forests of the Pacific Northwest. We core-sampled living roots, dead organic matter, and mineral fragments at three soil depths on a 300-sample grid at nine forested sites in western Washington and Oregon resulting in approximately 7200 samples. We explored...

  18. Five Hundred Pages and a Topic of Her Own: Successfully Designing an Advanced Writing Course on 19th Century British Women Novelists

    ERIC Educational Resources Information Center

    Phillips, Amy Criniti

    2009-01-01

    During the fourth year of Amy Phillips' teaching assistantship in the spring semester of 2008, she was asked to teach a 300-level advanced writing course in which she was given the creative freedom to design the syllabus, choose the textbooks, craft all assignments, and organize the course content. However, there was one stipulation: the course,…

  19. Development of Precoat Filtration Technology for Reverse Osmosis Units

    DTIC Science & Technology

    1981-11-20

    CONTRACT DAAK 70-79-C-0046 0 FINAL REPORT 0 DEVELOPMENT OF PRECOAT FILTRATION TECHNOLOGY FOR REVERSE OSMOSIS UNITS Submitted by: ,i JOHNS - MANVILLE SALES...NTU (Hach). The one square foot vertical leaf filter was set up at the Johns - Manville R&D Center as shown in Figure 1. A 300 gallon feed tank was

  20. Irrigation Comes to Staples

    ERIC Educational Resources Information Center

    Lund, Duane R.

    1977-01-01

    Describes the case of Staples, Minnesota, where the vocational-technical school bought a 300-acre farm and with the help of a strong advisory committee was instrumental in changing the farming practices in an eight-county area. Emphasis is on the role and activities of the advisory committee; eleven specific contributions are listed. (HD)

  1. 33 CFR 165.T01-0329 - Regulated Navigation Area; Maine Kennebec Bridge Construction and Removal, Kennebec River...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... notice, as well as Broadcast Notice to Mariners and Local Notice to Mariners. (2) Violations of this RNA... Regulated Navigation Area (RNA): All navigable waters, surface to bottom, on the Kennebec River within a 300....11 and 165.13 apply within the RNA. (2) In accordance with the general regulations, entry into or...

  2. 33 CFR 165.T01-1097 - Regulated Navigation Area; Memorial Bridge Construction, Piscataqua River, Portsmouth, NH.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... (RNA): All navigable waters, surface to bottom, on the Piscataqua River within a 300 yard radius of... 33 CFR 165.10, 165.11, and 165.13 apply within the RNA, and in addition: (2) In accordance with the... caution and operate in such a manner as to produce no wake. (4) Vessels must comply with all directions...

  3. 33 CFR 165.T01-1097 - Regulated Navigation Area; Memorial Bridge Construction, Piscataqua River, Portsmouth, NH.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... (RNA): All navigable waters, surface to bottom, on the Piscataqua River within a 300 yard radius of... 33 CFR 165.10, 165.11, and 165.13 apply within the RNA, and in addition: (2) In accordance with the... caution and operate in such a manner as to produce no wake. (4) Vessels must comply with all directions...

  4. Near-Road Mulltipollutant Profiles: Association between Volatile Organic Compounds and a Tracer Gas Surrogate Near a Busy Highway

    EPA Science Inventory

    This research characterizes associations between multiple pollutants in the near-road environment attributed to a roadway line source. It also examines the use of a tracer gas as a surrogate of mobile source pollutants. Air samples were collected in summa canisters along a 300 m ...

  5. Soil nitrogen accretion along a floodplain terrace chronosequence in northwest Alaska: Influence of the nitrogen-fixing shrub Shepherdia Canadensis

    Treesearch

    Charles Rhoades; Dan Binkley; Hlynur Oskarsson; Robert Stottlemyer

    2008-01-01

    Nitrogen enters terrestrial ecosystems through multiple pathways during primary succession. We measured accumulation of total soil nitrogen and changes in inorganic nitrogen (N) pools across a 300-y sequence of river terraces in northwest Alaska and assessed the contribution of the nitrogen-fixing shrub Shepherdia canadensis. Our work compared 5...

  6. Interdisciplinary Teaching of Theatre and Human Rights in Honors

    ERIC Educational Resources Information Center

    Szasz, Maria

    2017-01-01

    Since spring 2012, the author has taught a 300-level Theatre and Human Rights class in the University of New Mexico Honors College. One of the centerpieces of honors education is careful research and thorough analysis of what is taught and why it is taught. In creating the honors class Theatre and Human Rights, the author explored how she would…

  7. GRAIL Spots Gravity Anomaly

    NASA Image and Video Library

    2012-12-05

    A 300-mile-long linear gravity anomaly on the far side of the moon has been revealed by gravity gradients measured by NASA GRAIL mission. GRAIL data are shown on the left, with red and blue corresponding to stronger gravity gradients.

  8. 17 CFR Appendix A to Part 151 - Spot-Month Position Limits

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... Contract Referencedcontract spot- month limit Agricultural Referenced Contracts ICE Futures U.S. Cocoa 1,000 ICE Futures U.S. Coffee C 500 Chicago Board of Trade Corn 600 ICE Futures U.S. Cotton No. 2 300 ICE Futures U.S. FCOJ-A 300 Chicago Mercantile Exchange Class III Milk 1,500 Chicago Mercantile...

  9. Motor Control of Landing from a Jump in Simulated Hypergravity.

    PubMed

    Gambelli, Clément N; Theisen, Daniel; Willems, Patrick A; Schepens, Bénédicte

    2015-01-01

    On Earth, when landing from a counter-movement jump, muscles contract before touchdown to anticipate imminent collision with the ground and place the limbs in a proper position. This study assesses how the control of landing is modified when gravity is increased above 1 g. Hypergravity was simulated in two different ways: (1) by generating centrifugal forces during turns of an aircraft (A300) and (2) by pulling the subject downwards in the laboratory with a Subject Loading System (SLS). Eight subjects were asked to perform counter-movement jumps at 1 g on Earth and at 3 hypergravity levels (1.2, 1.4 and 1.6 g) both in A300 and with SLS. External forces applied to the body, movements of the lower limb segments and muscular activity of 6 lower limb muscles were recorded. Our results show that both in A300 and with SLS, as in 1 g: (1) the anticipation phase is present; (2) during the loading phase (from touchdown until the peak of vertical ground reaction force), lower limb muscles act like a stiff spring, whereas during the second part (from the peak of vertical ground reaction force until the return to the standing position), they act like a compliant spring associated with a damper. (3) With increasing gravity, the preparatory adjustments and the loading phase are modified whereas the second part does not change drastically. (4) The modifications are similar in A300 and with SLS, however the effect of hypergravity is accentuated in A300, probably due to altered sensory inputs. This observation suggests that otolithic information plays an important role in the control of the landing from a jump.

  10. Effect of Water Quality and Temperature on the Efficiency of Two Kinds of Hydrophilic Polymers in Soil.

    PubMed

    Dehkordi, Davoud Khodadadi

    2018-06-01

      In this study, evaluation of two-superabsorbent effects, Super-AB-A-300 and Super-AB-A-200 in a sandy soil on the water retention capability and saturated hydraulic conductivity (Ks) at different water quality and soil temperature were done. The Super-AB-A-200 was less effective in water uptake than Super-AB-A-300. The efficiency of these polymers in water retention was negatively influenced by the water quality and temperature. The efficiency of these polymer treatments in water uptake reduced significantly (P < 0.05) with increasing soil temperature. In the control soil, the Ks stayed nearly constant with increasing soil temperature. As compared to the untreated control, the treated soil demonstrated a significant (P < 0.05) linear increase of Ks with increasing soil temperature. In the control soil, the water holding properties curve did not change with increasing soil temperature.

  11. Models of Voltage-Dependent Conformational Changes in NaChBac Channels

    PubMed Central

    Shafrir, Yinon; Durell, Stewart R.; Guy, H. Robert

    2008-01-01

    Models of the transmembrane region of the NaChBac channel were developed in two open/inactivated and several closed conformations. Homology models of NaChBac were developed using crystal structures of Kv1.2 and a Kv1.2/2.1 chimera as templates for open conformations, and MlotiK and KcsA channels as templates for closed conformations. Multiple molecular-dynamic simulations were performed to refine and evaluate these models. A striking difference between the S4 structures of the Kv1.2-like open models and MlotiK-like closed models is the secondary structure. In the open model, the first part of S4 forms an α-helix, and the last part forms a 310 helix, whereas in the closed model, the first part of S4 forms a 310 helix, and the last part forms an α-helix. A conformational change that involves this type of transition in secondary structure should be voltage-dependent. However, this transition alone is not sufficient to account for the large gating charge movement reported for NaChBac channels and for experimental results in other voltage-gated channels. To increase the magnitude of the motion of S4, we developed another model of an open/inactivated conformation, in which S4 is displaced farther outward, and a number of closed models in which S4 is displaced farther inward. A helical screw motion for the α-helical part of S4 and a simple axial translation for the 310 portion were used to develop models of these additional conformations. In our models, four positively charged residues of S4 moved outwardly during activation, across a transition barrier formed by highly conserved hydrophobic residues on S1, S2, and S3. The S4 movement was coupled to an opening of the activation gate formed by S6 through interactions with the segment linking S4 to S5. Consistencies of our models with experimental studies of NaChBac and Kv channels are discussed. PMID:18641074

  12. European Science Notes, Volume 40, Number 5.

    DTIC Science & Technology

    1986-05-01

    microbiology , genetic engineering, and genetic engineering of plants is reviewed. Environmental Sciences -: ") EUROMECH 201-Aplications of the Jchanics...Si"co lo with the research activities at the Lab- Soil Microbiology oratory of Genetics at the University of It is now well documented that a Ghent...spec- tesi , for succeeding in running dedica- tacular observation of SFPM up to four " ted research under incredibly hard Stokes orders in a 300-m

  13. International Space Station Bus Regulation With NASA Glenn Research Center Flywheel Energy Storage System Development Unit

    NASA Technical Reports Server (NTRS)

    Kascak, Peter E.; Kenny, Barbara H.; Dever, Timothy P.; Santiago, Walter; Jansen, Ralph H.

    2001-01-01

    An experimental flywheel energy storage system is described. This system is being used to develop a flywheel based replacement for the batteries on the International Space Station (ISS). Motor control algorithms which allow the flywheel to interface with a simplified model of the ISS power bus, and function similarly to the existing ISS battery system, are described. Results of controller experimental verification on a 300 W-hr flywheel are presented.

  14. Spatial and temporal distribution of singlet oxygen in Lake Superior.

    PubMed

    Peterson, Britt M; McNally, Ann M; Cory, Rose M; Thoemke, John D; Cotner, James B; McNeill, Kristopher

    2012-07-03

    A multiyear field study was undertaken on Lake Superior to investigate singlet oxygen ((1)O(2)) photoproduction. Specifically, trends within the lake were examined, along with an assessment of whether correlations existed between chromophoric dissolved organic matter (CDOM) characteristics and (1)O(2) production rates and quantum yields. Quantum yield values were determined and used to estimate noontime surface (1)O(2) steady-state concentrations ([(1)O(2)](ss)). Samples were subdivided into three categories based on their absorbance properties (a300): riverine, river-impacted, or open lake sites. Using calculated surface [(1)O(2)](ss), photochemical half-lives under continuous summer sunlight were calculated for cimetidine, a pharmaceutical whose reaction with (1)O(2) has been established, to be on the order of hours, days, and a week for the riverine, river-impacted, and open lake waters, respectively. Of the CDOM properties investigated, it was found that dissolved organic carbon (DOC) and a300 were the best parameters for predicting production rates of [(1)O(2)](ss). For example, given the correlations found, one could predict [(1)O(2)](ss) within a factor of 4 using a300 alone. Changes in the quantum efficiency of (1)O(2) production upon dilution of river water samples with lake water samples demonstrated that the CDOM found in the open lake is not simply diluted riverine organic matter. The open lake pool was characterized by low absorption coefficient, low fluorescence, and low DOC, but more highly efficient (1)O(2) production and predominates the Lake Superior system spatially. This study establishes that parameters that reflect the quantity of CDOM (e.g., a300 and DOC) correlate with (1)O(2) production rates, while parameters that characterize the absorbance spectrum (e.g., spectral slope coefficient and E2:E3) correlate with (1)O(2) production quantum yields.

  15. Determination of the Secondary Bjerknes Force in Acoustic Resonators on Ground and in Microgravity Conditions

    NASA Astrophysics Data System (ADS)

    Castro, Luz Angelica; Hoyos, Mauricio

    2016-04-01

    We propose an experimental methodology to determine the secondary Bjerknes force between rigid particles. Measurements done for different particles sizes showed acoustical inter particles interactions. We use and extend the methodology presented in a previous work. The determination of this force will lead us a better understanding of the aggregation process in acoustic resonators. We report in this work, the results of two parabolic flights campaigns performed at the Airbus A300 ZERO-G (Novespace, France).

  16. Joint Logistics Commanders Guide for the Management of Multinational Program,

    DTIC Science & Technology

    1981-07-01

    purchase of the A-300 Airbus and the 1977 record-breaking export performance of the French and UK aerospace industries of around $5 billion and $2 billion...DIS. They are the Defense Industrial Security Clearance Office ( DISCO ), the Defense Industrial Security Institute (DISI), and the Office of Industrial...Security International (ISI). Defense Industrial Security Clearance Office ( DISCO ) The Defense Industrial Security Program (DISP) establishes pro

  17. Treating Gulf War Illness with Novel Anti-Inflammatories: A Screening of Botantical Microglia Modulators

    DTIC Science & Technology

    2015-10-01

    SUBJECT TERMS Gulf War Illness, botanical , anti-inflammatory, biomarker, microglia, improvement, treatment 16. SECURITY CLASSIFICATION OF: 17...promising botanical anti-inflammatories for the treatment of Gulf War Illness (GWI). A second, exploratory, aim is to identify biomarkers of GWI...3 different botanical compounds and placebo over a 300 day period. Each participant will also participate in a 30-day baseline period starting the

  18. Acute Traumatic Coagulopathy: Whole Blood Thrombelastography Measures the Tip of the Iceberg

    DTIC Science & Technology

    2015-01-01

    with the thromboelastography analyser. Blood Coagul Fibrinolysis. 2009;20(6):436Y439. 14. Engstrom M , Schott U, Romner B , Reinstrup P. Acidosis impairs...PAGES 7 19a. NAME OF RESPONSIBLE PERSON a. REPORT unclassified b . ABSTRACT unclassified c. THIS PAGE unclassified Standard Form 298 (Rev. 8-98...and 10KL) of 1- M 2-[morpholino]ethanesulfonic acidYbuffered saline (MBS) to a 300-KL volume sample in the TEG cup (Table 1). MBS was chosen for its

  19. DINS Final Report.

    DTIC Science & Technology

    1979-10-19

    A optical input from a laser ggw system . The photodetector assembly shall consist of two chips: (1) photodiode chip and (2) preamplifier chip. The...181 4.1 Transienit Gamm ------ - 182 4.2 Therm~al Noise ------------------- 186 2 1 System F’unatioma Diagram -B 2 Bonding...5 2u.0 ed IG o Hl MM The desJign reurnents of the DIM~ Pbto detector System are - The system sball 1eev a 300 nhnowatt, (Min.) 63282 signal from a

  20. The Atmospheric Effects of Soot Resulting From a Nuclear Conflict

    DTIC Science & Technology

    1985-03-20

    winl break up Into long vertical f-la1ents. This process may significantly change the mean optical properties of the cloud layer .and thus alter the... changes predicted by ICA CC4 foliowing injection of a unifomt soot layer in a 30 . . . . . . . . . . . .. . .t. . . . . 12 4 T~rtu changes predicted...by the EB, followdzx a sprintime (22 Ma•rch) injection of a uniform soot Iin a 300 to 700,i band ....... ............... 14 5 Tmq.r’ature changes

  1. Golden Rays - July 2017 | Solar Research | Solar Research | NREL

    Science.gov Websites

    Operator, First Solar, and NREL tested a 300-MW PV plant to demonstrate that, with proper controls, PV can technique to measure charge-carrier transport in PV materials. Solar Plus: A Holistic Approach to Distribution Solar PV By optimizing how PV interacts with other electricity loads at the household- and grid

  2. Maunder, E W (1851-1928) and Maunder, Mrs A S D

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    Solar astronomers. Maunder became assistant for spectroscopic and solar observations at the Royal Observatory, Greenwich under GEORGE AIRY, aided by his wife. In 1890, while studying the numbers of sunspots over a 300 year time-span he noticed the scarcity of spots in the period 1645-1715. This so-called Maunder minimum was confirmed by Jack Eddy (1976) to be a real effect rather than simply a...

  3. Low-Cost, High Efficiency, Silicon Based Photovoltaic Devices

    DTIC Science & Technology

    2015-08-27

    for photovoltaic applications. Figure 14: (a) Absorption and scattering efficiencies versus sizes of Au nanoparticle at 550 nm, (b) scattering...efficiency as a function of wavelength for different Au nanoparticles sizes . 32 Review of plasmonics light trapping for photovoltaic application...ensure that the irradiation variation was within 3%. The external quantum efficiency (EQE) system used a 300W Xenon light source with a spot size of 1mm

  4. Compilation of 1990 Annual Reports of the Navy ELF Communications System Ecological Monitoring Program. Volume 3. Tabs G thru I.

    DTIC Science & Technology

    1991-08-01

    whereas control areas support more deciduous habitats (Blake et al. 1988). Differences in a variety of other habitat features also occur, but the deciduous...a heavy duty marine battery and was filtered through a 300 micrometer mesh filter and rolls of polyester in the common reservoir before flowing into...Ann. Rev. Systematics & Ecology, 5:309-323. Stout, R. Jean. 1981. How abiotic factors affect the distribution of two species of tropical predaceous

  5. Maglev ready for prime time.

    SciTech Connect

    Rote, D. M.; Johnson, L. R.; Energy Systems

    2003-01-01

    Putting Maglev on Track' (Issues, Spring 1990) observed that growing airline traffic and associated delays were already significant and predicted that they would worsen. The article argued that a 300-mile-per-hour (mph) magnetic levitation (maglev) system integrated into airport and airline operations could be a part of the solution. Maglev was not ready for prime time in 1990, but it is now.

  6. Destabilization of Cohesive Intertidal Sediments by Infauna

    NASA Astrophysics Data System (ADS)

    de Deckere, E. M. G. T.; Tolhurst, T. J.; de Brouwer, J. F. C.

    2001-11-01

    Bioturbation activity was reduced in four plots on an intertidal mudflat in the Humber estuary (UK) during 4 days, by spraying the sediment with an insecticide, namely vydate. Macrofaunal, especially Nereis diversicolor and oligochaeta, and meiofaunal densities decreased, while the diatom biomass did not change. This resulted in a 300% increase in sediment stability, caused by a reduction in bioturbation and grazing pressure and a decrease in the water content.

  7. Demonstration and Validation of a Portable Raman Sensor for In-Situ Detection and Monitoring of Perchlorate (ClO4 )

    DTIC Science & Technology

    2017-03-01

    was used to expose patterns of ellipse dimer arrays into a ~300 nm thick ZEP520A e-beam resist which had been spin coated on silicon wafers and baked ...prepared from solid NaClO4 salt (anhydrous ACS grade). 2. NaClO4 salt is baked at ~200 °C for at least 12 h and then stored in a desiccator prior to

  8. Evaluation of a New Equation for Calculating the Maximum Wait Time for Pilots That Have Used an Impairing Medication

    DTIC Science & Technology

    2013-08-01

    were treating pre-existing medical conditions using over-the-counter (OTC) medications ( Aspirin ™, Tylenol™, antihistamines, etc.), provided blood...time would decrease to 45 hours for a 150-lb person taking the same dose; a 300 -lb individual taking a 25-mg dose would only need to wait 31 hours...If the 300 -lb person mentioned above had taken a 50- mg dose, the wait time would have been 45 hours, which is approximately the same as the 49

  9. Indonesia: An Environmental Security Assessment

    DTIC Science & Technology

    1998-04-01

    Jakarta estimates a 300-330 percent rise in emissions from most major pollutants between 1980 and 2000.12 Subsidies on gasoline, kerosene, and fuel oil ...make driving cars and using “dirtier” fuel oil easier than trying alternative energy means. Finding suitable ways to control emissions will be a...government- run oil -fired power plant on Sumatra is using low sulfur oil to reduce air pollutants. The government also sponsors a Clean City Program

  10. Wind shear measuring on board an airliner

    NASA Technical Reports Server (NTRS)

    Krauspe, P.

    1984-01-01

    A measurement technique which continuously determines the wind vector on board an airliner during takeoff and landing is introduced. Its implementation is intended to deliver sufficient statistical background concerning low frequency wind changes in the atmospheric boundary layer and extended knowledge about deterministic wind shear modeling. The wind measurement scheme is described and the adaptation of apparatus onboard an A300 airbus is shown. Preliminary measurements made during level flight demonstrate the validity of the method.

  11. Using the Non-Intrusive Load Monitor for Shipboard Supervisory Control

    DTIC Science & Technology

    2007-06-01

    consists of a NEMA certified enclosure with voltage transducers and a DC power supply inside, appropriately sized current transducers, and a...command to the UEC. UEC starts a 300-second (5 minutes). “GTM __ TRANSITIONING TO COOLDOWN” is displayed on the AMLCD. “ NORM STOP/COOLDOWN...MMA-010, 01 Jul 1992. 80 Appendix A NILM Parts List Nomenclature Manufacturer Part Number Quantity NEMA Enclosure Rittal Corporation

  12. Design of a Geothermal Downhole Magnetic Flowmeter

    SciTech Connect

    Glowka, Dave A.; Normann, Randy A.

    2015-06-15

    This paper covers the development of a 300°C geothermal solid-state magnetic flowmeter (or magmeter) to support in situ monitoring of future EGS (enhanced geothermal system) production wells. Existing flowmeters are simple mechanical spinner sensors. These mechanical sensors fail within as little as 10 hrs, while a solid-state magmeter has the potential for months/years of operation. The design and testing of a magnetic flow sensor for use with existing high-temperature electronics is presented.

  13. This NASA Dryden F/A-18 is participating in the Automated Aerial Refueling (AAR) project. F/A-18 (No

    NASA Technical Reports Server (NTRS)

    2002-01-01

    A NASA Dryden F/A-18 is participating in the Automated Aerial Refueling (AAR) project. F/A-18 (No. 847) is acting as an in-flight refueling tanker in the study to develop analytical models for an automated aerial refueling system for unmanned vehicles. A 300-gallon aerodynamic pod containing air-refueling equipment is seen beneath the fuselage. The hose and refueling basket are extended during an assessment of their dynamics on the F/A-18A.

  14. High temperature arc-track resistant aerospace insulation

    NASA Technical Reports Server (NTRS)

    Dorogy, William

    1994-01-01

    The topics are presented in viewgraph form and include the following: high temperature aerospace insulation; Foster-Miller approach to develop a 300 C rated, arc-track resistant aerospace insulation; advantages and disadvantages of key structural features; summary goals and achievements of the phase 1 program; performance goals for selected materials; materials under evaluation; molecular structures of candidate polymers; candidate polymer properties; film properties; and a detailed program plan.

  15. Systems aspects of a space nuclear reactor power system

    NASA Technical Reports Server (NTRS)

    Jaffe, L.; Fujita, T.; Beatty, R.; Bhandari, P.; Chow, E.; Deininger, W.; Ewell, R.; Grossman, M.; Bloomfield, H.; Heller, J.

    1988-01-01

    Various system aspects of a 300-kW nuclear reactor power system for spacecraft have been investigated. Special attention is given to the cases of a reusable OTV and a space-based radar. It is demonstrated that the stowed length of the power system is important to mission design, and that orbital storage for months to years may be needed for missions involving orbital assembly.

  16. Alternative to the traditional discount method of wholesaler purchasing.

    PubMed

    Lee, G F; Bair, J N; Piz, J W

    1982-07-01

    A program of purchasing drugs from wholesalers at the wholesaler's exact invoice cost plus a percentage is described and compared with the traditional method of average wholesale price (AWP) less a discount. The comparison was conducted by the pharmacy department of a 310-bed, teaching hospital that awarded a one-year contract to a wholesaler offering its items at the exact cost plus a pre-established percentage. Data collected from monthly wholesaler computer printouts gave the following information on each product: (1) list price per item, (2) actual cost to pharmacy per item, (3) percentage discount from AWP, and (4) quantity ordered. The net percentage discount from AWP for 12 months was calculated and compared to the former (traditional) discount rate. The net discount from AWP was 15.6% for purchases made by the hospital during the first 12 months of the program. When compared with the smaller discount the hospital traditionally received, the new program saved the hospital $5758 on annual purchases of $136,419. The actual dollar savings to an institution that changes from a traditional discount program to a cost-plus-percentage program depends on: (1) the negotiated percentage added to wholesaler cost, (2) the discount from AWP that the institution was previously receiving, and (3) the volume of wholesale purchases.

  17. Concentrations of selected contaminants in cabin air of airbus aircrafts.

    PubMed

    Dechow, M; Sohn, H; Steinhanses, J

    1997-07-01

    The concentrations of selected air quality parameters in aircraft cabins were investigated including particle numbers in cabin air compared to fresh air and recirculation air, the microbiological contamination and the concentration of volatile organic compounds (VOC). The Airbus types A310 of Swissair and A340 of Lufthansa were used for measurements. The particles were found to be mainly emitted by the passengers, especially by smokers. Depending on recirculation filter efficiency the recirculation air contained a lower or equal amount of particles compared to the fresh air, whereas the amount of bacteria exceeded reported concentrations within other indoor spaces. The detected species were mainly non-pathogenic, with droplet infection over short distances identified as the only health risk. The concentration of volatile organic compounds (VOC) were well below threshold values. Ethanol was identified as the compound with the highest amount in cabin air. Further organics were emitted by the passengers--as metabolic products or by smoking--and on ground as engine exhaust (bad airport air quality). Cleaning agents may be the source of further compounds.

  18. [Intensive care within the context of military long-distance transport].

    PubMed

    Hossfeld, B; Rohowsky, B; Rödig, E; Lampl, L

    2004-05-01

    Due to the changed task spectrum of the German Federal Armed Forces with participation in international deployments for UN and NATO the concept of Aeromedical Evacuation (MedEvac) gained a new quality for the Air Force as well as for the Medical Corps. The transport of mostly severely injured or critically ill patients requires both, medical equipment which has to be permanently adapted to the national standard, and qualified intensive-care-personnel. At present, the aircrafts used for such deployments are four C-160 Transall, one CL-601 Challenger and two Airbus A310, which, if necessary, can be equipped with one or more intensive-care "patient transportation units" (PTU). Contrary to the two other aircrafts, the CL-601 Challenger is only equipped for the intensive-care transport of one individual patient. The PTU corresponds to the technical equipment of the intensive care unit of a level-1-trauma centre and ensures an intensive-care therapy on highest level also during longer transportation. The work with this equipment, the characteristics of the long-distance air transport and the special situation of the military deployment causes special demands on the qualifications of the assigned personnel. Primarily planned for the repatriation of injured or ill soldiers, in the mean time, this concept is also essential for the medevac of civilian victims after mass casualties worldwide.

  19. Molecular cloning and tissue-specific transcriptional regulation of the first peroxidase family member, Udp1, in stinging nettle (Urtica dioica).

    PubMed

    Douroupi, Triantafyllia G; Papassideri, Issidora S; Stravopodis, Dimitrios J; Margaritis, Lukas H

    2005-12-05

    A full-length cDNA clone, designated Udp1, was isolated from Urtica dioica (stinging nettle), using a polymerase chain reaction based strategy. The putative Udp1 protein is characterized by a cleavable N-terminal signal sequence, likely responsible for the rough endoplasmic reticulum entry and a 310 amino acids mature protein, containing all the important residues, which are evolutionary conserved among different members of the plant peroxidase family. A unique structural feature of the Udp1 peroxidase is defined into the short carboxyl-terminal extension, which could be associated with the vacuolar targeting process. Udp1 peroxidase is differentially regulated at the transcriptional level and is specifically expressed in the roots. Interestingly, wounding and ultraviolet radiation stress cause an ectopic induction of the Udp1 gene expression in the aerial parts of the plant. A genomic DNA fragment encoding the Udp1 peroxidase was also cloned and fully sequenced, revealing a structural organization of three exons and two introns. The phylogenetic relationships of the Udp1 protein to the Arabidopsis thaliana peroxidase family members were also examined and, in combination with the homology modelling approach, dictated the presence of distinct structural elements, which could be specifically involved in the determination of substrate recognition and subcellular localization of the Udp1 peroxidase.

  20. [The modification in surgical technique of incision and closure vault of the vagina during vaginal hysterectomy on the incidence of vault haematoma].

    PubMed

    Malinowski, Andrzej; Mołas, Justyna; Maciołek-Blewniewska, Grazyna; Cieślak, Jarosław

    2006-02-01

    Vault haematoma is one of the most common complication of vaginal hysterectomy. The aim of this work was to analyse the effects of a modification of incision and closure technique of the vaginal vault on the incidence of vault haematoma after vaginal hysterectomy. The study group consisted of 333 women of whom 49 (group A) underwent vaginal hysterectomy traditional technique of incision and closure of the vaginal vault, an 284 (group B) modified technique. Following parameters were evaluated: number of vault haematomas, blood loss, postoperative fever, required antibiotics, length of hospital stay. The risk of vault haematoma was significantly lower in the group B (1,06% vs 12,4%). Loss of blood was higher in group A (310 ml vs 206 ml). Incidence of postoperative fever was in 12,2% patients from group A, and 1,4% from group B. The length of hospitalization was lower for women in group B (4,3 days compared with 7,3 days). The modification of incision and closure technique of the vaginal vault during vaginal hysterectomy is recommended to minimise intra- and postoperative complications.

  1. Diffraction-Based Optical Switching with MEMS

    DOE PAGES

    Blanche, Pierre-Alexandre; LaComb, Lloyd; Wang, Youmin; ...

    2017-04-19

    In this article, we are presenting an overview of MEMS-based (Micro-Electro-Mechanical System) optical switch technology starting from the reflective two-dimensional (2D) and three-dimensional (3D) MEMS implementations. To further increase the speed of the MEMS from these devices, the mirror size needs to be reduced. Small mirror size prevents efficient reflection but favors a diffraction-based approach. Two implementations have been demonstrated, one using the Texas Instruments DLP (Digital Light Processing), and the other an LCoS-based (Liquid Crystal on Silicon) SLM (Spatial Light Modulator). These switches demonstrated the benefit of diffraction, by independently achieving high speed, efficiency, and high number of ports.more » We also demonstrated for the first time that PSK (Phase Shift Keying) modulation format can be used with diffraction-based devices. To be truly effective in diffraction mode, the MEMS pixels should modulate the phase of the incident light. We are presenting our past and current efforts to manufacture a new type of MEMS where the pixels are moving in the vertical direction. The original structure is a 32 x 32 phase modulator array with high contrast grating pixels, and we are introducing a new sub-wavelength linear array capable of a 310 kHz modulation rate« less

  2. Rabies among African wild dogs (Lycaon pictus) in the Masai Mara, Kenya.

    PubMed

    Kat, P W; Alexander, K A; Smith, J S; Richardson, J D; Munson, L

    1996-10-01

    A pack of African wild dogs (Lycaon pictus) ranging to the north of the Masai Mara National Reserve in southwestern Kenya was monitored from 1988 to 1989. During a 6-week period (August 1-September 13, 1989), 21 of 23 members of this pack died. Seven carcasses were retrieved, of which 4 were suitable for necropsy and histopathologic examination. Gross findings varied among individuals and included multiple bite wounds, synovitis, lymphadenopathy, submandibular, cervical, and vocal cord edema, blood in bronchi, bronchioles, stomach, and intestine, and interioventral lung lobe consolidation. Histologic examination of 2 available brain samples revealed nonsuppurative encephalitis with eosinophilic intracytoplasmic inclusions (Negri bodies). An additional brain sample tested positive for rabies via a fluorescent antibody test. Other histologic features included severe suppurative bronchopneumonia, myocarditis, and lymphoid depletion of the lymph nodes, tonsils, and spleen. A 304-base pair (bp) nucleotide sequence from the N gene and a 310-bp sequence from the G gene from rabies isolates of 4 wild dogs indicated that infection was with a rabies variant common among domestic dogs in Kenya and Tanzania.

  3. Structural and Biochemical Basis for Ubiquitin Ligase Recruitment by Arrestin-related Domain-containing Protein-3 (ARRDC3)*

    PubMed Central

    Qi, Shiqian; O'Hayre, Morgan; Gutkind, J. Silvio; Hurley, James H.

    2014-01-01

    After protracted stimulation, the β2-adrenergic receptor and many other G-protein-coupled receptors are ubiquitinated and down-regulated. Arrestin-related domain-containing protein-3 (ARRDC3) has been proposed to recruit the ubiquitin ligase Nedd4 to the β2-adrenergic receptor. ARRDC3 contains two PPXY motifs that could potentially interact with any of the four WW domains of Nedd4. Here we dissect the interaction determinants. ARRDC3 PPXY-Nedd4 WW dissociation constants vary from unmeasurable to Kd = 3 μm for the third WW domain of Nedd4 binding to the first PPXY motif of ARRDC3. Structures of the uncomplexed and PPXY1-bound WW3 domain were determined at 1.1 and 1.7 Å resolution. The structures revealed conformational changes upon binding and the hydrogen bonding network in exquisite detail. Tight packing of ARRDC3 Val-352′, part of a 310 helix at the C terminus of PPXY1, is important for high affinity binding to WW3. Although no single WW domain is strictly essential for the binding of Nedd4 and ARRDC3 expressed in HEK293 cells, high affinity binding of full-length ARRDC3 and Nedd4 is driven by the avid interaction of both PPXY motifs with either the WW2-WW3 or WW3-WW4 combinations, with Kd values as low as 300 nm. PMID:24379409

  4. Structural and biochemical basis for ubiquitin ligase recruitment by arrestin-related domain-containing protein-3 (ARRDC3).

    PubMed

    Qi, Shiqian; O'Hayre, Morgan; Gutkind, J Silvio; Hurley, James H

    2014-02-21

    After protracted stimulation, the β2-adrenergic receptor and many other G-protein-coupled receptors are ubiquitinated and down-regulated. Arrestin-related domain-containing protein-3 (ARRDC3) has been proposed to recruit the ubiquitin ligase Nedd4 to the β2-adrenergic receptor. ARRDC3 contains two PPXY motifs that could potentially interact with any of the four WW domains of Nedd4. Here we dissect the interaction determinants. ARRDC3 PPXY-Nedd4 WW dissociation constants vary from unmeasurable to Kd = 3 μM for the third WW domain of Nedd4 binding to the first PPXY motif of ARRDC3. Structures of the uncomplexed and PPXY1-bound WW3 domain were determined at 1.1 and 1.7 Å resolution. The structures revealed conformational changes upon binding and the hydrogen bonding network in exquisite detail. Tight packing of ARRDC3 Val-352', part of a 310 helix at the C terminus of PPXY1, is important for high affinity binding to WW3. Although no single WW domain is strictly essential for the binding of Nedd4 and ARRDC3 expressed in HEK293 cells, high affinity binding of full-length ARRDC3 and Nedd4 is driven by the avid interaction of both PPXY motifs with either the WW2-WW3 or WW3-WW4 combinations, with Kd values as low as 300 nM.

  5. 60-MW test using the 30-MW klystrons for the KEKB project

    NASA Astrophysics Data System (ADS)

    Fukuda, S.; Michizono, S.; Nakao, K.; Saito, Y.; Anami, S.

    1995-07-01

    The B-Factory is a future plan, requiring an energy upgrade of the KEK linac from 2.5 GeV to 8.0 GeV (KEKB Project). This paper describes the recent development of an S-band high-power pulse klystron to be used as the PF-linac rf-source of the B-Factory. This tube is a modified version of the existing 30-MW tube, which produces 51 MW at a 310 kV beam voltage by optimizing the focusing magnetic field. In order to increase the reliability, the cathode diameter, the gun housing, and the insulation ceramic-seal were enlarged. This tube was redesigned so as to have the same characteristics as the test results of 30-MW tubes at a higher applied voltage without changing the rf interaction region. Four prototype tubes have been manufactured; final test results showed that these new tubes produce an output power of more than 50 MW at 310 kV with an efficiency of 46%. Recently this tube has produced more than 60 MW at a 350 kV beam voltage for a demonstration test. A comparison between the FCI-code prediction and the test results is also given in this paper.

  6. Geological notes, Boory field, Cameron County, Texas

    SciTech Connect

    Stapp, W.L.

    1981-12-01

    The gas fields of the Lower Miocene sands of Cameron County have gained enough maturity in their production experience to afford a consideration of their performance and characteristics. The Holy Beach field in the Laguna Madre has produced over 100 billion cu ft of gas, and others have produced over 25 billion; several are smaller. The characteristics of these fields include the modest cost of drilling in the range of pays 3000 ft to 7500 ft depth, and the small area of production, with several pay sands, usually a few feet thick but being very porous (over 30%) and permeablemore » (streaks of over 800 md). A fairly dry gas is produced with normal pressures. The Boory field may be singled out as a small but interesting field in this trend. It was found in 1973 and produced 4-1/2 billion cu ft of gas from a 310-acre area with 8 pay sands in depths 4750 to 6200 ft depth. The field was abandoned in 1980.« less

  7. Diffraction-Based Optical Switching with MEMS

    SciTech Connect

    Blanche, Pierre-Alexandre; LaComb, Lloyd; Wang, Youmin

    In this article, we are presenting an overview of MEMS-based (Micro-Electro-Mechanical System) optical switch technology starting from the reflective two-dimensional (2D) and three-dimensional (3D) MEMS implementations. To further increase the speed of the MEMS from these devices, the mirror size needs to be reduced. Small mirror size prevents efficient reflection but favors a diffraction-based approach. Two implementations have been demonstrated, one using the Texas Instruments DLP (Digital Light Processing), and the other an LCoS-based (Liquid Crystal on Silicon) SLM (Spatial Light Modulator). These switches demonstrated the benefit of diffraction, by independently achieving high speed, efficiency, and high number of ports.more » We also demonstrated for the first time that PSK (Phase Shift Keying) modulation format can be used with diffraction-based devices. To be truly effective in diffraction mode, the MEMS pixels should modulate the phase of the incident light. We are presenting our past and current efforts to manufacture a new type of MEMS where the pixels are moving in the vertical direction. The original structure is a 32 x 32 phase modulator array with high contrast grating pixels, and we are introducing a new sub-wavelength linear array capable of a 310 kHz modulation rate« less

  8. Results from Two Years of Web-Based Astronomy Teaching

    NASA Astrophysics Data System (ADS)

    Wallin, J.

    1996-12-01

    During the last two years, course notes, supplemental material, bulletin boards, and an interactive quiz system have been developed for the introductory astronomy course at George Mason University. In this talk, I will present results about the level of Web literacy, Web usage, and educational effectiveness of this system based on in-class surveys and test results. The results presented are based on a 300 person survey course composed primarily of non-science majors. Although this course currently includes a lecture section, we plan to offer this as a web-based distance learning course within six months.

  9. Self-regenerating Nanotips: Indestructable Field-emission Cathodes for Low-power Electric Propulsion

    DTIC Science & Technology

    2010-09-27

    Field Emission Scanning Electron Microscope. The chamber was evacuated using a series of three ion pumps and vacuum pressure of 10-7 Torr was...backed by a 110-L/min dry scroll pump . The chamber is also equipped with a 300-L/s combination ion/sublimation pump that can maintain pressure of...Torr for 2 to 24 hours and then the ion pump was turned off to let the vacuum pressure slowly increase while observing the electron emission

  10. VizieR Online Data Catalog: Abundances of LAMOST giants from APOGEE DR12 (Ho+, 2017)

    NASA Astrophysics Data System (ADS)

    Ho, A. Y. Q.; Ness, M. K.; Hogg, D. W.; Rix, H.-W.; Liu, C.; Yang, F.; Zhang, Y.; Hou, Y.; Wang, Y.

    2017-09-01

    The Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) is a low-resolution (R~1800) optical (3650-9000Å) spectroscopic survey. APOGEE is a high-resolution (R~22500), high-S/N (S/N~100), H-band (15200-16900Å) spectroscopic survey, part of the Sloan Digital Sky Survey III. Observations are conducted using a 300 fiber spectrograph on the 2.5m Sloan Telescope at the Apache Point Observatory (APO) in Sunspot, New Mexico (USA). (1 data file).

  11. Direct Observation of Dislocation Core Structures in CdTe/GaAs(001).

    PubMed

    McGibbon, A J; Pennycook, S J; Angelo, J E

    1995-07-28

    A strategy is presented for determining sublattice polarity at defects in compound semiconductors. Core structures of 60-degree and Lomer dislocations in the CdTe/GaAs(001) system have been obtained by the application of maximum-entropy analysis to Z-contrast images (Z is atomic number) obtained in a 300-kilovolt scanning transmission electron microscope. Sixty-degree dislocations were observed to be of the glide type, whereas in the case of Lomer dislocations, both a symmetric (Hornstra-like) core and an unexpected asymmetric structure made up of a fourfold ring were seen.

  12. Superstrong Adjustable Permanent Magnet for a Linear Collider Final Focus

    SciTech Connect

    Mihara, T.

    A superstrong permanent magnet quadrupole (PMQ) is one of the candidates for the final focus lens for the linear collider because of its compactness and low power consumption. The first fabricated prototype of our PMQ achieved a 300T/m superstrong field gradient with a 100mm overall magnet radius and a 7mm bore radius, but a drawback is its fixed strength. Therefore, a second prototype of PMQ, whose strength is adjustable, was fabricated. Its strength adjustability is based on the ''double ring structure'', rotating subdivided magnet slices separately. This second prototype is being tested. Some of the early results are presented.

  13. Ultrashort Pulse (USP) Laser-Matter Interactions

    DTIC Science & Technology

    2013-03-05

    spectroscopy • Frequency/time transfer • High-capacity comms • Coherent LIDAR • Optical clocks • Calibration Material Science ultrashort, high...Laboratory 41 Laser -driven x-rays generation (0.1 – 10 MeV) • Scattering from a 300 MeV electron beam can Doppler shift a 1-eV energy laser ...1 Integrity  Service  Excellence Ultrashort Pulse (USP) Laser – Matter Interactions 5 MAR 2013 Dr. Riq Parra Program Officer AFOSR/RTB

  14. Developing satellite-derived estimates of surface moisture status

    NASA Technical Reports Server (NTRS)

    Nemani, Ramakhrishna; Pierce, Lars; Running, Steve; Goward, Samuel

    1993-01-01

    An evaluation is made of the remotely sensed surface temperature (Ts)/normalized difference vegetation index (NDVI) relationship in studies of the influence of biome type on the slope of Ts/NDVI, and of the automation of the process of defining the relationship so that the surface moisture status can be compared with Ts/NDVI at continental scales. The analysis is conducted using the NOAA AVHRR over a 300 x 300 km area in western Montana, as well as biweekly composite AVHRR data. A strong negative relationship is established between NDVI and Ts over all biome types.

  15. Electron transfer dynamics of bistable single-molecule junctions.

    PubMed

    Danilov, Andrey V; Kubatkin, Sergey E; Kafanov, Sergey G; Flensberg, Karsten; Bjørnholm, Thomas

    2006-10-01

    We present transport measurements of single-molecule junctions bridged by a molecule with three benzene rings connected by two double bonds and with thiol end-groups that allow chemical binding to gold electrodes. The I-V curves show switching behavior between two distinct states. By statistical analysis of the switching events, we show that a 300 meV mode mediates the transition between the two states. We propose that breaking and reformation of a S-H bond in the contact zone between molecule and electrode explains the observed bistability.

  16. SciTech Connect

    Singh, Arvind, E-mail: anita@barc.gov.in; Topkar, Anita

    In order to improve the gamma discrimination capability for thermal neutron measurements using silicon PIN detectors, a novel approach of use of thin epitaxial silicon PIN detectors was investigated. Thin epitaxial silicon detectors with thickness of 15 µm were developed and their performance was tested with thermal neutrons using {sup 10}B converter. The performance of this detector was compared with the performance of a 300 µm silicon detector. The results of experiments presented in this paper indicate that thin epitaxial silicon detectors can significantly improve γ discrimination for thermal neutron measurements.

  17. Biocompatible artificial DNA linker that is read through by DNA polymerases and is functional in Escherichia coli

    PubMed Central

    El-Sagheer, Afaf H.; Sanzone, A. Pia; Gao, Rachel; Tavassoli, Ali; Brown, Tom

    2011-01-01

    A triazole mimic of a DNA phosphodiester linkage has been produced by templated chemical ligation of oligonucleotides functionalized with 5′-azide and 3′-alkyne. The individual azide and alkyne oligonucleotides were synthesized by standard phosphoramidite methods and assembled using a straightforward ligation procedure. This highly efficient chemical equivalent of enzymatic DNA ligation has been used to assemble a 300-mer from three 100-mer oligonucleotides, demonstrating the total chemical synthesis of very long oligonucleotides. The base sequences of the DNA strands containing this artificial linkage were copied during PCR with high fidelity and a gene containing the triazole linker was functional in Escherichia coli. PMID:21709264

  18. The use of alloy 117 as a liquid metal current collector

    NASA Astrophysics Data System (ADS)

    Maribo, David; Sondergaard, Neal

    1987-09-01

    Low melting point, bismuth based alloys are potential replacements for NaK78 as liquid metal slip ring material because of their lower reactivity and potentially greater hydrodynamic stability. This paper describes experiments with one such alloy in a model of a 300 kW superconducting homopolar motor using close clearance braid type collectors. Slip ring tip velocities varied from 5 to 20 m/s and currents ranging from 500 to 2000 A. Viscous power losses tend to follow a simple turbulent mode. In all, the data supports the use of low melting point alloys as an alternative to Na78.

  19. National Dam Inspection Program. Johnson’s Pond (NDI-ID Number MD-11), Wicomico River Basin, Wicomico River, Wicomico County, Maryland. Phase I Inspection Report,

    DTIC Science & Technology

    1980-07-01

    a mean high tide of 2.07 feet above m.s.l. and a mean low tide of 0.93 feet below mean sea level. Driven timber sheeting forming a sharp crested weir ...dam for Johnson’s Pond since its crest elevation exceeds mean high tide events. However, during record high tide events, the weir becomes submerged...comprised of a 300 foot long ogee spillway with wingwalls at the left and right abutments. According to the dam crest survey, the lowest point along the

  20. Improved Kennedy-Thorndike experiment to test special relativity

    NASA Technical Reports Server (NTRS)

    Hils, Dieter; Hall, J. L.

    1990-01-01

    A modern version of the Kennedy-Thorndike experiment was carried out by searching for sidereal variations between the frequency of a laser locked to an I2 reference line and a laser locked to the resonance frequency of a highly stable cavity. No variations were found at the level of 2 x 10 to the -12th. This represents a 300-fold improvement over the original Kennedy-Thorndike experiment and allows the Lorentz transformations to be deduced entirely from experiment at an accuracy level of 70 ppm.

  1. Improved Kennedy-Thorndike experiment to test special relativity

    NASA Astrophysics Data System (ADS)

    Hils, Dieter; Hall, J. L.

    1990-04-01

    A modern version of the Kennedy-Thorndike experiment was carried out by searching for sidereal variations between the frequency of a laser locked to an I2 reference line and a laser locked to the resonance frequency of a highly stable cavity. No variations were found at the level of 2 x 10 to the -12th. This represents a 300-fold improvement over the original Kennedy-Thorndike experiment and allows the Lorentz transformations to be deduced entirely from experiment at an accuracy level of 70 ppm.

  2. The discovery of an 81 minute modulation of the X-ray flux from 2A0311-227

    NASA Technical Reports Server (NTRS)

    White, N. E.

    1980-01-01

    The X-ray flux from 2A0311-227 was modulated at the 81 min orbital period of its optical counterpart. An absorption dip with N sub H equivalent to 5 x 10 to the 22nd power H atoms per square cm was observed at magnetic phase 0.42. It was interpreted as the accretion column of a magnetic white dwarf passing in front of the X-ray source. The spectrum was thermal with a temperature of 18 keV and a 300 eV equivalent width iron line at 6.6 keV.

  3. Optically pumped lasing in a rolled-up dot-in-a-well (DWELL) microtube via the support of Au pad

    NASA Astrophysics Data System (ADS)

    Chai, Zhaoer; Wang, Qi; Cao, Jiawei; Mao, Guoming; Liu, Hao; Ren, Xiaomin; Maleev, Nikolai A.; Vasil'ev, Alexey P.; Zhukov, Alexey E.; Ustinov, Victor M.

    2018-02-01

    We report the observation of optically pumped continuous wave lasing in a self-rolled-up InGaAs/GaAs quantum dot microtube at room temperature. Single layer of InAs quantum dots ( 2.6 ML coverage) in a GaAs well sandwiched by two AlGaAs barriers are incorporated into the tube wall as the gain media. As-fabricated microtube is supported by a 300-nm-thick Au pad, aiming to separate the tube from GaAs substrate and thus to decrease the substrate loss, which finally enables lasing with ultralow threshold power ( 4 µW) from an microtube ring resonator.

  4. Measured radial dependence of the peak sheath voltages present in very high frequency capacitive discharges

    DOE PAGES

    Barnat, E. V.; Miller, P. A.; Hebner, G. A.; ...

    2007-05-16

    In this paper, the radial distribution of the measured voltage drop across a sheath formed between a 300mm electrode and an argon plasma discharge is shown to depend on the excitation radio frequency, under constant power and pressure conditions. At a lower frequency of 13.56MHz, the voltage drop across the sheath is uniform across the 300mm electrode, while at higher frequencies of 60 and 162MHz the voltage drop becomes radially nonuniform. Finally, the magnitude and spatial extent of the nonuniformity become greater with increasing frequency.

  5. Earth Observations taken by the Expedition 15 Crew

    NASA Image and Video Library

    2007-06-26

    ISS015-E-14584 (26 June 2007) --- The "bull's-eye" of the Richat Structure in the barren Gres de Chinguetti Plateau, central Mauritania in northwest Africa is featured in this image photographed by an Expedition 15 crewmember on the International Space Station. It represents domally uplifted, layered (sedimentary) rocks that have been eroded by water and wind into the present shape. The 25-mile-wide structure is a 300-foot-deep landmark that has caught the eye of many an astronaut in Earth orbit.

  6. New Material Overcomes a Long-Standing Challenge for Efficient, Onboard Storage of Hydrogen using Adsorbents

    SciTech Connect

    Fuel Cell Technologies Office

    The quest to develop a low cost material that efficiently stores hydrogen onboard fuel cell electric vehicles at low pressures and near room temperature has been pursued by U.S. Department of Energy since the early 2000s. This success story describes a recent early stage scientific breakthrough by researchers at Lawrence Berkeley National Laboratory that could open the door to achieving a material that offers a 300+ mile driving range with 5 minute refuels, while still only emitting water vapor at the tail pipe.

  7. Time-resolved energy spectrum measurement of a linear induction accelerator with the magnetic analyzer

    NASA Astrophysics Data System (ADS)

    Wang, Yuan; Jiang, Xiao-Guo; Yang, Guo-Jun; Chen, Si-Fu; Zhang, Zhuo; Wei, Tao; Li, Jin

    2015-01-01

    We recently set up a time-resolved optical beam diagnostic system. Using this system, we measured the high current electron beam energy in the accelerator under construction. This paper introduces the principle of the diagnostic system, describes the setup, and shows the results. A bending beam line was designed using an existing magnetic analyzer with a 300 mm-bending radius and a 60° bending angle at hard-edge approximation. Calculations show that the magnitude of the beam energy is about 18 MeV, and the energy spread is within 2%. Our results agree well with the initial estimates deduced from the diode voltage approach.

  8. Number of Players and Relative Pitch Area per Player: Comparing Their Influence on Heart Rate and Physical Demands in Under-12 and Under-13 Football Players.

    PubMed

    Castellano, Julen; Puente, Asier; Echeazarra, Ibon; Usabiaga, Oidui; Casamichana, David

    2016-01-01

    The aim of the present study is to analyse the influence of different large-sided games (LSGs) on the physical and physiological variables in under-12s (U12) and -13s (U13) soccer players. The effects of the combination of different number of players per team, 7, 9, and 11 (P7, P9, and P11, respectively) with three relative pitch areas, 100, 200, and 300 m(2) (A100, A200, and A300, respectively), were analysed in this study. The variables analysed were: 1) global indicator such as total distance (TD); work:rest ratio (W:R); player-load (PL) and maximal speed (Vmax); 2) heart rate (HR) mean and time spent in different intensity zones of HR (<75%, 75-84%, 84-90% and >90%), and; 3) five absolute (<8, 8-13, 13-16 and >16 Km h(-1)) and three relative speed categories (<40%, 40-60% and >60% Vmax). The results support the theory that a change in format (player number and pitch dimensions) affects no similarly in the two players categories. Although it can seem that U13 players are more demanded in this kind of LSG, when the work load is assessed from a relative point of view, great pitch dimensions and/or high number of player per team are involved in the training task to the U12 players. The results of this study could alert to the coaches to avoid some types of LSGs for the U12 players such as: P11 played in A100, A200 or A300, P9 played in A200 or A300 and P7 played in A300 due to that U13>U12 in several physical and physiological variables (W:R, time spent in 84-90%HRmax, distance in 8-13 and 13-16 Km h(-1) and time spent in 40-60%Vmax). These results may help youth soccer coaches to plan the progressive introduction of LSGs so that task demands are adapted to the physiological and physical development of participants.

  9. Downdating a time-varying square root information filter

    NASA Technical Reports Server (NTRS)

    Muellerschoen, Ronald J.

    1990-01-01

    A new method to efficiently downdate an estimate and covariance generated by a discrete time Square Root Information Filter (SRIF) is presented. The method combines the QR factor downdating algorithm of Gill and the decentralized SRIF algorithm of Bierman. Efficient removal of either measurements or a priori information is possible without loss of numerical integrity. Moreover, the method includes features for detecting potential numerical degradation. Performance on a 300 parameter system with 5800 data points shows that the method can be used in real time and hence is a promising tool for interactive data analysis. Additionally, updating a time-varying SRIF filter with either additional measurements or a priori information proceeds analogously.

  10. A Volumetric Method for Titrimetric Analysis of Hydrogen Peroxide

    DTIC Science & Technology

    1985-05-06

    fairly satisfactory indicator. Sulfuric acid solutions of cerium are stable over long periods of time, unlike the less stable nitric and hydrochloric acid ...Fisher number D141-5. 5. Sulfuric acid , concentrated (95-98 percent). For example, Fisher number A 300-212. 6. O-Phosphoric acid , 85 percent:. For example...Fisher number A 242-500. 7. 5 N sulfuric acid (Reference 11): Slowly pour 75 mL of concentrated sulfuric acid (95-98 percent) into approximately 200

  11. Analysis of Lidar Remote Sensing Concepts

    NASA Technical Reports Server (NTRS)

    Spiers, Gary D.

    1999-01-01

    Line of sight velocity and measurement position sensitivity analyses for an orbiting coherent Doppler lidar are developed and applied to two lidars, one with a nadir angle of 30 deg. in a 300 km altitude, 58 deg. inclination orbit and the second for a 45 deg. nadir angle instrument in a 833 km altitude, 89 deg. inclination orbit. The effect of orbit related effects on the backscatter sensitivity of a coherent Doppler lidar is also discussed. Draft performance estimate, error budgets and payload accommodation requirements for the SPARCLE (Space Readiness Coherent Lidar) instrument were also developed and documented.

  12. Gold nanoparticles in a polycarbonate matrix for optical limiting against a CW laser

    NASA Astrophysics Data System (ADS)

    Frare, M. C.; Weber, V.; Signorini, R.; Bozio, R.

    2014-10-01

    The optical limiting behavior of thin polymer films doped with gold nanoparticles is investigated under continuous wave illumination at two different wavelengths: 488 and 514 nm. Closed aperture Z-scan measurements reveal a negative nonlinear refractive index of around 10-6 W cm-2, comparable with that reported for liquid samples, due to the non-local thermal refraction process. The effectiveness of the optical limiting action is assessed, for varying input powers, by measuring the transmitted irradiance in a 300 ms time interval, corresponding to the blinking time of the human eye. It is thus possible to evaluate the total fluence reaching the retina.

  13. High efficiency epitaxial GaAs/GaAs and GaAs/Ge solar cell technology using OM/CVD

    NASA Technical Reports Server (NTRS)

    Wang, K. L.; Yeh, Y. C. M.; Stirn, R. J.; Swerdling, S.

    1980-01-01

    A technology for fabricating high efficiency, thin film GaAs solar cells on substrates appropriate for space and/or terrestrial applications was developed. The approach adopted utilizes organometallic chemical vapor deposition (OM-CVD) to form a GaAs layer epitaxially on a suitably prepared Ge epi-interlayer deposited on a substrate, especially a light weight silicon substrate which can lead to a 300 watt per kilogram array technology for space. The proposed cell structure is described. The GaAs epilayer growth on single crystal GaAs and Ge wafer substrates were investigated.

  14. Metal-Insulator-Metal Diode Process Development for Energy Harvesting Applications

    DTIC Science & Technology

    2010-04-01

    Sputter Tool Dep Method: Sputtering (DC Magnetron ) Recipe: MC_Pt 1640A_TiO2 1000A_Ti 2000A_500C_1a MC_Pt 1640A_TiO2 1000A_Ti 2000A_300C_1a MC_Pt...thin films were sputtered onto silicon substrates with silicon dioxide overlayers. I-V measurements were taken using an electrical characterization...deposition of the entire MIM material stack to be done without breaking the vacuum within a multi-material system DC sputtering tool. A CAD layout of a MIM

  15. General Kenney Reports: A Personal History of the Pacific War

    DTIC Science & Technology

    1997-01-01

    in Gen- eral Kenney Reports. In December 1945 he was given an assignment with the Military Staff Committee of the United Nations , which took him...way that with a little fixing could be used by DC- type trans- ports. About ten miles west of Buna, however, the country was wide-open. The country was ...each over the convoy. Although a 300-pound bomb was rather light for this type of work, it was all they had. They sank one of the minesweepers and then

  16. Metrology of flat mirrors with a computer generated hologram

    NASA Astrophysics Data System (ADS)

    Pariani, Giorgio; Tresoldi, Daniela; Moschetti, Manuele; Riva, Marco; Bianco, Andrea; Zerbi, Filippo Maria

    2014-07-01

    We designed the interferometric test of a 300 mm flat mirror, based onto a spherical mirror and a dedicated CGH. The spherical beam of the interferometer is quasi collimated to the desired diameter by the spherical mirror, used slightly off-axis, and the CGH performs the residual wavefront correction. We performed tests on a 200 mm and 300 mm flat mirrors, and compared the results to the ones obtained by stitching, showing an accuracy well within the designed value. The possibility to calibrate the cavity by subtracting out the figure errors of the spherical mirror has also been evaluated.

  17. High resolution hard X-ray spectra of solar and cosmic sources. Ph.D. Thesis

    NASA Technical Reports Server (NTRS)

    Schwartz, R. A.

    1984-01-01

    High resolution hard X-ray observations of a large solar flare and the Crab Nebula were obtained during balloon flights using an array of cooled germanium planar detectors. In addition, high time resolution high sensitivity measurements were obtained with a 300 square cm NaI/CsI phoswich scintillator. The Crab spectrum from both flights was searched without finding evidence of line emission below 200 keV. In particular, for the 73 keV line previously reported a 3 sigma upper limit for a narrow (1 keV FWHM) line .0019 and .0014 ph square cm/sec for the 1979 and 1980 flights, respectively was obtained.

  18. Real-time distributed fiber microphone based on phase-OTDR.

    PubMed

    Franciscangelis, Carolina; Margulis, Walter; Kjellberg, Leif; Soderquist, Ingemar; Fruett, Fabiano

    2016-12-26

    The use of an optical fiber as a real-time distributed microphone is demonstrated employing a phase-OTDR with direct detection. The method comprises a sample-and-hold circuit capable of both tuning the receiver to an arbitrary section of the fiber considered of interest and to recover in real-time the detected acoustic wave. The system allows listening to the sound of a sinusoidal disturbance with variable frequency, music and human voice with ~60 cm of spatial resolution through a 300 m long optical fiber.

  19. Anastomosis of endothelial sprouts forms new vessels in a tissue analogue of angiogenesis.

    PubMed

    Song, Jonathan W; Bazou, Despina; Munn, Lance L

    2012-08-01

    Here we describe a microfluidic device that accurately reproduces the dynamics of vascular anastomosis, the process by which vascular sprouts connect to achieve perfusion during angiogenesis. The micro-device features two parallel endothelial cell-lined vessel analogues separated by a 300 μm wide collagenous matrix into which the vessels can sprout and form perfused bridging connections. By accurately recapitulating anastomosis in vitro, the device will enable a new generation of studies of the mechanisms of angiogenesis and provide a novel and practical platform for drug screening.

  20. Preparation of ZnS microdisks using chemical bath deposition and ZnS/p-Si heterojunction solar cells

    NASA Astrophysics Data System (ADS)

    Hsiao, Y. J.; Meen, T. H.; Ji, L. W.; Tsai, J. K.; Wu, Y. S.; Huang, C. J.

    2013-10-01

    The synthesis and heterojunction solar cell properties of ZnS microdisks prepared by the chemical bath deposition method were investigated. The ZnS deposited on the p-Si blanket substrate exhibits good coverage. The lower reflectance spectra were found as the thickness of the ZnS film increased. The optical absorption spectra of the 80 °C ZnS microdisk exhibited a band-gap energy of 3.4 eV and the power conversion efficiency (PCE) of the AZO/ZnS/p-Si heterojunction solar cell with a 300 nm thick ZnS film was η=2.72%.

  1. Enhanced optical clearing of skin in vivo and optical coherence tomography in-depth imaging

    NASA Astrophysics Data System (ADS)

    Wen, Xiang; Jacques, Steven L.; Tuchin, Valery V.; Zhu, Dan

    2012-06-01

    The strong optical scattering of skin tissue makes it very difficult for optical coherence tomography (OCT) to achieve deep imaging in skin. Significant optical clearing of in vivo rat skin sites was achieved within 15 min by topical application of an optical clearing agent PEG-400, a chemical enhancer (thiazone or propanediol), and physical massage. Only when all three components were applied together could a 15 min treatment achieve a three fold increase in the OCT reflectance from a 300 μm depth and 31% enhancement in image depth Zthreshold.

  2. Number of Players and Relative Pitch Area per Player: Comparing Their Influence on Heart Rate and Physical Demands in Under-12 and Under-13 Football Players

    PubMed Central

    Castellano, Julen; Puente, Asier; Echeazarra, Ibon; Usabiaga, Oidui; Casamichana, David

    2016-01-01

    The aim of the present study is to analyse the influence of different large-sided games (LSGs) on the physical and physiological variables in under-12s (U12) and -13s (U13) soccer players. The effects of the combination of different number of players per team, 7, 9, and 11 (P7, P9, and P11, respectively) with three relative pitch areas, 100, 200, and 300 m2 (A100, A200, and A300, respectively), were analysed in this study. The variables analysed were: 1) global indicator such as total distance (TD); work:rest ratio (W:R); player-load (PL) and maximal speed (Vmax); 2) heart rate (HR) mean and time spent in different intensity zones of HR (<75%, 75–84%, 84–90% and >90%), and; 3) five absolute (<8, 8–13, 13–16 and >16 Km h-1) and three relative speed categories (<40%, 40–60% and >60% Vmax). The results support the theory that a change in format (player number and pitch dimensions) affects no similarly in the two players categories. Although it can seem that U13 players are more demanded in this kind of LSG, when the work load is assessed from a relative point of view, great pitch dimensions and/or high number of player per team are involved in the training task to the U12 players. The results of this study could alert to the coaches to avoid some types of LSGs for the U12 players such as: P11 played in A100, A200 or A300, P9 played in A200 or A300 and P7 played in A300 due to that U13>U12 in several physical and physiological variables (W:R, time spent in 84–90%HRmax, distance in 8–13 and 13–16 Km h-1 and time spent in 40–60%Vmax). These results may help youth soccer coaches to plan the progressive introduction of LSGs so that task demands are adapted to the physiological and physical development of participants. PMID:26752422

  3. Contact diode laser: high power application through fiberoptic cutting tips.

    PubMed

    Wafapoor, H; Peyman, G A; Moritera, T

    1994-01-01

    Diode laser energy has been applied through a fiberoptic probe using a power setting of 2.5 watts (W) in the continuous mode. In this study we employed high-power diode laser energy (4 to 12 W, continuous wave) to incise ocular tissue through a fiberoptic probe using 100 microns and 300 microns tips. The retina was photocoagulated with a 300 microns orb tip. No bleeding occurred at the incision sites. Histologic evaluation revealed coagulation into the healthy tissue ranging from 10 to 50 microns.

  4. Smoke in the Gulf of Mexico

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This Sea-viewing Wide Field-of-view Sensor (SeaWiFS) image of the Bay of Campeche, acquired January 17, 2001, shows a 300-kilometer long smoke plume streaming towards the northwest from around 19.4o North and 92o West, the location of the Akal oil field. In the lower right (southeast) corner of the image is the country of El Salvador, site of a magnitude 7.6 earthquake on January 13, 2001. On the Pacific side of Southern Mexico, the productive waters of the Gulf of Tehuantepec are visible. Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE

  5. Development of an Organic Rankine-Cycle power module for a small community solar thermal power experiment

    NASA Technical Reports Server (NTRS)

    Kiceniuk, T.

    1985-01-01

    An organic Rankine-cycle (ORC) power module was developed for use in a multimodule solar power plant to be built and operated in a small community. Many successful components and subsystems, including the reciever, power conversion subsystem, energy transport subsystem, and control subsystem, were tested. Tests were performed on a complete power module using a test bed concentrator in place of the proposed concentrator. All major single-module program functional objectives were met and the multimodule operation presented no apparent problems. The hermetically sealed, self-contained, ORC power conversion unit subsequently successfully completed a 300-hour endurance run with no evidence of wear or operating problems.

  6. Monitoring crack extension in fracture toughness tests by ultrasonics

    NASA Technical Reports Server (NTRS)

    Klima, S. J.; Fisher, D. M.; Buzzard, R. J.

    1975-01-01

    An ultrasonic method was used to observe the onset of crack extension and to monitor continued crack growth in fracture toughness specimens during three point bend tests. A 20 MHz transducer was used with commercially available equipment to detect average crack extension less than 0.09 mm. The material tested was a 300-grade maraging steel in the annealed condition. A crack extension resistance curve was developed to demonstrate the usefulness of the ultrasonic method for minimizing the number of tests required to generate such curves.

  7. Electron holography study of magnetization behavior in the writer pole of a perpendicular magnetic recording head by a 1 MV transmission electron microscope.

    PubMed

    Hirata, Kei; Ishida, Yoichi; Akashi, Tetsuya; Shindo, Daisuke; Tonomura, Akira

    2012-01-01

    The magnetic domain structure of the writer poles of perpendicular magnetic recording heads was studied using electron holography. Although the domain structure of a 100-nm-thick writer pole could be observed with a 300 kV transmission electron microscope, that of the 250-nm-thick writer pole could not be analyzed due to the limited transmission capability of the instrument. On the other hand, the detailed domain structure of the 250-nm-thick writer pole was successfully analyzed by a 1 MV electron microscope using its high transmission capability. The thickness and material dependency of the domain structure of a writer pole were discussed.

  8. Development of a Watt-level gamma-ray source based on high-repetition-rate inverse Compton scattering

    SciTech Connect

    Mihalcea, D.; Murokh, A.; Piot, P.

    2017-07-01

    A high-brilliance (~10 22 photon s -1 mm -2 mrad -2 /0.1%) gamma-ray source experiment is currently being planned at Fermilab (E γ≃1.1 MeV). The source implements a high-repetition-rate inverse Compton scattering by colliding electron bunches formed in a ~300-MeV superconducting linac with a high-intensity laser pulse. This paper describes the design rationale along with some of technical challenges associated to producing high-repetition-rate collision. The expected performances of the gamma-ray source are also presented.

  9. Development and technical implementation of the separation nozzle process for enrichment of uranium-235

    SciTech Connect

    Becker, E.W.; Bier, W.; Bley, P.

    In the separation nozzle process, enrichment is achieved by extremely high centrifugal forces in a curved flow of UF/sub 6/ diluted by a light gas. The first commercial application is in Brasil, where a so-called First Cascade consisting of 24 separation nozzle stages is under construction. In two steps, this installation will be expanded into a 300,000 SWU/a demonstration plant. The development of components for commercial plants is well under way. The paper describes developments and technical implementation of the separation nozzle process. Remarkable progress has been made in the process economy.

  10. Design and performance of an instrument for electron impact tandem mass spectrometry and action spectroscopy of mass/charge selected macromolecular ions stored in RF ion trap*

    NASA Astrophysics Data System (ADS)

    Ranković, Milos Lj.; Giuliani, Alexandre; Milosavljević, Aleksandar R.

    2016-06-01

    A new apparatus was designed, coupling an electron gun with a linear quadrupole ion trap mass spectrometer, to perform m/ z (mass over charge) selected ion activation by electron impact for tandem mass spectrometry and action spectroscopy. We present in detail electron tracing simulations of a 300 eV electron beam inside the ion trap, design of the mechanical parts, electron optics and electronic circuits used in the experiment. We also report examples of electron impact activation tandem mass spectra for Ubiquitin protein, Substance P and Melittin peptides, at incident electron energies in the range from 280 eV to 300 eV.

  11. Satellite measurements of the earth's crustal magnetic field

    NASA Technical Reports Server (NTRS)

    Schnetzler, C. C.

    1989-01-01

    The literature associated with the Magsat mission has evaluated the capabilities and limitations of satellite measurements of the earth's crustal magnetic field, and demonstrated that there exists a 300-3000 km magnetic field, related to major features in the earth's crust, which is primarily caused by induction. Due to its scale and sensitivity, satellite data have been useful in the development of models for such large crustal features as subduction zones, submarine platforms, continental accretion boundaries, and rifts. Attention is presently given to the lack of agreement between laboratory and satellite estimates of lower crustal magnetization.

  12. Toward a Profile of Soviet Behavior in International Financial Markets,

    DTIC Science & Technology

    1987-08-01

    offered even better terms than indicated in Table 3. In October 1986, Banque Nationale de Paris managed a $300 million Table 3 TERMS OF SOVIET BORROWING...I ’, Bank, Claim-. 1 All ()%% C)A111-HIS Ilep in I eceiuhtr 19 2 26 211 Ie )een i e r I I Os󈧐 lt4.222 I )ecerlher !A, 1 hi , he le n i tr 1- Iat tr...French hank. In the BIS reporting scheme, this transaction is no (lifTerent t’roi at deposit by a British bank in Banque Nationale (de Paris. But just

  13. Thermocouple-based Temperature Sensing System for Chemical Cell Inside Micro UAV Device

    NASA Astrophysics Data System (ADS)

    Han, Yanhui; Feng, Yue; Lou, Haozhe; Zhang, Xinzhao

    2018-03-01

    Environmental temperature of UAV system is crucial for chemical cell component inside. Once the temperature of this chemical cell is over 259 °C and keeps more than 20 min, the high thermal accumulation would result in an explosion, which seriously damage the whole UAV system. Therefore, we develop a micro temperature sensing system for monitoring the temperature of chemical cell thermally influenced by UAV device deployed in a 300 °C temperature environment, which is quite useful for insensitive munitions and UAV safety enhancement technologies.

  14. Alternative Oxidase Transcription Factors AOD2 and AOD5 of Neurospora crassa Control the Expression of Genes Involved in Energy Production and Metabolism.

    PubMed

    Qi, Zhigang; Smith, Kristina M; Bredeweg, Erin L; Bosnjak, Natasa; Freitag, Michael; Nargang, Frank E

    2017-02-09

    In Neurospora crassa , blocking the function of the standard mitochondrial electron transport chain results in the induction of an alternative oxidase (AOX). AOX transfers electrons directly from ubiquinol to molecular oxygen. AOX serves as a model of retrograde regulation since it is encoded by a nuclear gene that is regulated in response to signals from mitochondria. The N. crassa transcription factors AOD2 and AOD5 are necessary for the expression of the AOX gene. To gain insight into the mechanism by which these factors function, and to determine if they have roles in the expression of additional genes in N. crassa , we constructed strains expressing only tagged versions of the proteins. Cell fractionation experiments showed that both proteins are localized to the nucleus under both AOX inducing and noninducing conditions. Furthermore, chromatin immunoprecipitation and high throughput sequencing (ChIP-seq) analysis revealed that the proteins are bound to the promoter region of the AOX gene under both conditions. ChIP-seq also showed that the transcription factors bind to the upstream regions of a number of genes that are involved in energy production and metabolism. Dependence on AOD2 and AOD5 for the expression of several of these genes was verified by quantitative PCR. The majority of ChIP-seq peaks observed were enriched for both AOD2 and AOD5. However, we also observed occasional sites where one factor appeared to bind preferentially. The most striking of these was a conserved sequence that bound large amounts of AOD2 but little AOD5. This sequence was found within a 310 bp repeat unit that occurs at several locations in the genome. Copyright © 2017 Qi et al.

  15. The household economic burden for acute coronary syndrome survivors in Australia.

    PubMed

    Hyun, Karice K; Essue, Beverley M; Woodward, Mark; Jan, Stephen; Brieger, David; Chew, Derek; Nallaiah, Kellie; Howell, Tegwen; Briffa, Tom; Ranasinghe, Isuru; Astley, Carolyn; Redfern, Julie

    2016-11-08

    Studies of chronic diseases are associated with a financial burden on households. We aimed to determine if survivors of acute coronary syndrome (ACS) experience household economic burden and to quantify any potential burden by examining level of economic hardship and factors associated with hardship. Australian patients admitted to hospital with ACS during 2-week period in May 2012, enrolled in SNAPSHOT ACS audit and who were alive at 18 months after index admission were followed-up via telephone/paper survey. Regression models were used to explore factors related to out-of-pocket expenses and economic hardship. Of 1833 eligible patients at baseline, 180 died within 18 months, and 702 patients completed the survey. Mean out-of-pocket expenditure (n = 614) in Australian dollars was A$258.06 (median: A$126.50) per month. The average spending for medical services was A$120.18 (SD: A$310.35) and medications was A$66.25 (SD: A$80.78). In total, 350 (51 %) of patients reported experiencing economic hardship, 78 (12 %) were unable to pay for medical services and 81 (12 %) could not pay for medication. Younger age (18-59 vs ≥80 years (OR): 1.89), no private health insurance (OR: 2.04), pensioner concession card (OR: 1.80), residing in more disadvantaged area (group 1 vs 5 (OR): 1.77), history of CVD (OR: 1.47) and higher out-of-pocket expenses (group 4 vs 1 (OR): 4.57) were more likely to experience hardship. Subgroups of ACS patients are experiencing considerable economic burden in Australia. These findings provide important considerations for future policy development in terms of the cost of recommended management for patients.

  16. High pressure optical combustion probe

    SciTech Connect

    Woodruff, S.D.; Richards, G.A.

    1995-06-01

    The Department of Energy`s Morgantown Energy Technology Center has developed a combustion probe for monitoring flame presence and heat release. The technology involved is a compact optical detector of the OH radical`s UV fluorescence. The OH Monitor/Probe is designed to determine the flame presence and provide a qualitative signal proportional to the flame intensity. The probe can be adjusted to monitor a specific volume in the combustion zone to track spatial fluctuations in the flame. The probe is capable of nanosecond time response and is usually slowed electronically to fit the flame characteristics. The probe is a sapphire rod inmore » a stainless steel tube which may be inserted into the combustion chamber and pointed at the flame zone. The end of the sapphire rod is retracted into the SS tube to define a narrow optical collection cone. The collection cone may be adjusted to fit the experiment. The fluorescence signal is collected by the sapphire rod and transmitted through a UV transmitting, fused silica, fiber optic to the detector assembly. The detector is a side window photomultiplier (PMT) with a 310 run line filter. A Hamamatsu photomultiplier base combined with a integral high voltage power supply permits this to be a low voltage device. Electronic connections include: a power lead from a modular DC power supply for 15 VDC; a control lead for 0-1 volts to control the high voltage level (and therefore gain); and a lead out for the actual signal. All low voltage connections make this a safe and easy to use device while still delivering the sensitivity required.« less

  17. Sequences Flanking the Gephyrin-Binding Site of GlyRβ Tune Receptor Stabilization at Synapses

    PubMed Central

    Grünewald, Nora; Salvatico, Charlotte; Kress, Vanessa

    2018-01-01

    Abstract The efficacy of synaptic transmission is determined by the number of neurotransmitter receptors at synapses. Their recruitment depends upon the availability of postsynaptic scaffolding molecules that interact with specific binding sequences of the receptor. At inhibitory synapses, gephyrin is the major scaffold protein that mediates the accumulation of heteromeric glycine receptors (GlyRs) via the cytoplasmic loop in the β-subunit (β-loop). This binding involves high- and low-affinity interactions, but the molecular mechanism of this bimodal binding and its implication in GlyR stabilization at synapses remain unknown. We have approached this question using a combination of quantitative biochemical tools and high-density single molecule tracking in cultured rat spinal cord neurons. The high-affinity binding site could be identified and was shown to rely on the formation of a 310-helix C-terminal to the β-loop core gephyrin-binding motif. This site plays a structural role in shaping the core motif and represents the major contributor to the synaptic confinement of GlyRs by gephyrin. The N-terminal flanking sequence promotes lower affinity interactions by occupying newly identified binding sites on gephyrin. Despite its low affinity, this binding site plays a modulatory role in tuning the mobility of the receptor. Together, the GlyR β-loop sequences flanking the core-binding site differentially regulate the affinity of the receptor for gephyrin and its trapping at synapses. Our experimental approach thus bridges the gap between thermodynamic aspects of receptor-scaffold interactions and functional receptor stabilization at synapses in living cells. PMID:29464196

  18. Neuronal Calcium Sensor-1 Binds the D2 Dopamine Receptor and G-protein-coupled Receptor Kinase 1 (GRK1) Peptides Using Different Modes of Interactions*

    PubMed Central

    Pandalaneni, Sravan; Karuppiah, Vijaykumar; Saleem, Muhammad; Haynes, Lee P.; Burgoyne, Robert D.; Mayans, Olga; Derrick, Jeremy P.; Lian, Lu-Yun

    2015-01-01

    Neuronal calcium sensor-1 (NCS-1) is the primordial member of the neuronal calcium sensor family of EF-hand Ca2+-binding proteins. It interacts with both the G-protein-coupled receptor (GPCR) dopamine D2 receptor (D2R), regulating its internalization and surface expression, and the cognate kinases GRK1 and GRK2. Determination of the crystal structures of Ca2+/NCS-1 alone and in complex with peptides derived from D2R and GRK1 reveals that the differential recognition is facilitated by the conformational flexibility of the C-lobe-binding site. We find that two copies of the D2R peptide bind within the hydrophobic crevice on Ca2+/NCS-1, but only one copy of the GRK1 peptide binds. The different binding modes are made possible by the C-lobe-binding site of NCS-1, which adopts alternative conformations in each complex. C-terminal residues Ser-178–Val-190 act in concert with the flexible EF3/EF4 loop region to effectively form different peptide-binding sites. In the Ca2+/NCS-1·D2R peptide complex, the C-terminal region adopts a 310 helix-turn-310 helix, whereas in the GRK1 peptide complex it forms an α-helix. Removal of Ser-178–Val-190 generated a C-terminal truncation mutant that formed a dimer, indicating that the NCS-1 C-terminal region prevents NCS-1 oligomerization. We propose that the flexible nature of the C-terminal region is essential to allow it to modulate its protein-binding sites and adapt its conformation to accommodate both ligands. This appears to be driven by the variability of the conformation of the C-lobe-binding site, which has ramifications for the target specificity and diversity of NCS-1. PMID:25979333

  19. Neuronal Calcium Sensor-1 Binds the D2 Dopamine Receptor and G-protein-coupled Receptor Kinase 1 (GRK1) Peptides Using Different Modes of Interactions.

    PubMed

    Pandalaneni, Sravan; Karuppiah, Vijaykumar; Saleem, Muhammad; Haynes, Lee P; Burgoyne, Robert D; Mayans, Olga; Derrick, Jeremy P; Lian, Lu-Yun

    2015-07-24

    Neuronal calcium sensor-1 (NCS-1) is the primordial member of the neuronal calcium sensor family of EF-hand Ca(2+)-binding proteins. It interacts with both the G-protein-coupled receptor (GPCR) dopamine D2 receptor (D2R), regulating its internalization and surface expression, and the cognate kinases GRK1 and GRK2. Determination of the crystal structures of Ca(2+)/NCS-1 alone and in complex with peptides derived from D2R and GRK1 reveals that the differential recognition is facilitated by the conformational flexibility of the C-lobe-binding site. We find that two copies of the D2R peptide bind within the hydrophobic crevice on Ca(2+)/NCS-1, but only one copy of the GRK1 peptide binds. The different binding modes are made possible by the C-lobe-binding site of NCS-1, which adopts alternative conformations in each complex. C-terminal residues Ser-178-Val-190 act in concert with the flexible EF3/EF4 loop region to effectively form different peptide-binding sites. In the Ca(2+)/NCS-1·D2R peptide complex, the C-terminal region adopts a 310 helix-turn-310 helix, whereas in the GRK1 peptide complex it forms an α-helix. Removal of Ser-178-Val-190 generated a C-terminal truncation mutant that formed a dimer, indicating that the NCS-1 C-terminal region prevents NCS-1 oligomerization. We propose that the flexible nature of the C-terminal region is essential to allow it to modulate its protein-binding sites and adapt its conformation to accommodate both ligands. This appears to be driven by the variability of the conformation of the C-lobe-binding site, which has ramifications for the target specificity and diversity of NCS-1. © 2015 by The American Society for Biochemistry and Molecular Biology, Inc.

  20. Demographic patterns and harvest vulnerability of chronic wasting disease infected white-tailed deer in Wisconsin

    USGS Publications Warehouse

    Grear, D.A.; Samuel, M.D.; Langenberg, J.A.; Keane, D.

    2006-01-01

    Chronic wasting disease (CWD) is a fatal disease of white-tailed deer (Odocoileus virginianus) caused by transmissible protease-resistant prions. Since the discovery of CWD in southern Wisconsin in 2001, more than 20,000 deer have been removed from a >2,500-km2 disease eradication zone surrounding the three initial cases. Nearly all deer removed were tested for CWD infection and sex, age, and harvest location were recorded. Our analysis used data from a 310-km2 core study area where disease prevalence was higher than surrounding areas. We found no difference in harvest rates between CWD infected and noninfected deer. Our results show that the probability of infection increased with age and that adult males were more likely to be infected than adult females. Six fawns tested positive for CWD, five fawns from the core study area, including the youngest (5 months) free-ranging cervid to test positive. The increase in male prevalence with age is nearly twice the increase found in females. We concluded that CWD is not randomly distributed among deer and that differential transmission among sex and age classes is likely driving the observed patterns in disease prevalence. We discuss alternative hypotheses for CWD transmission and spread and, in addition, discuss several possible nonlinear relationships between prevalence and age. Understanding CWD transmission in free-ranging cervid populations will be essential to the development of strategies to manage this disease in areas where CWD is found, as well as for surveillance strategies in areas where CWD threatens to spread.

  1. Comparing three UV wavelengths for pre‐exposing Gafchromic EBT2 and EBT3 films

    PubMed Central

    Gotanda, Rumi; Gotanda, Tatsuhiro; Akagawa, Takuya; Tanki, Nobuyoshi; Kuwano, Tadao; Yabunaka, Kouichi

    2015-01-01

    Gafchromic films are used for X‐ray dose measurements during diagnostic examinations and have begun to be used for three‐dimensional X‐ray dose measurements using the high‐resolution characteristics of Gafchromic films for computed tomography. However, the problem of unevenness in Gafchromic film active layers needs to be resolved. Double exposures using X‐rays are performed during therapeutic radiology, although this is difficult for a diagnostic examination because of a heel effect. Thus, it has been suggested that ultraviolet (UV) radiation be used as a substitute for X‐rays. However, the appropriate UV wavelength has not been determined. Thus, we conducted this study to decide an appropriate UV wavelength. UV peak wavelengths of 245 nm (UV‐A), 310 nm (UV‐B), and 365 nm (UV‐C) were used to irradiate EBT2 and EBT3 films. Each UV wavelength was irradiated for 5, 15, 30, and 60 min, and irradiation was then repeated every 60 min up to 360 min. Gafchromic films were scanned after every irradiation using a flatbed scanner. Images were split into RGB images, and red images were analyzed using ImageJ, version 1.44, image analysis software. A region of interest (ROI) one‐half inch in diameter was placed in the center of subtracted Gafchromic film images, and UV irradiation times were plotted against mean pixel values. There were reactions in the front and back of Gafchromic EBT3 and the back of Gafchromic EBT2 with UV‐A and UV‐B. However, UV‐C resulted in some reactions in both sides of Gafchromic EBT2 and EBT3. The UV‐A and UV‐B wavelengths should be used. PACS number(s): 87.53 Bn PMID:26699578

  2. Surface Rupture Characteristics and Rupture Mechanics of the Yushu Earthquake (Ms7.1), 14/04/2010

    NASA Astrophysics Data System (ADS)

    Pan, J.; Li, H.; Xu, Z.; Li, N.; Wu, F.; Guo, R.; Zhang, W.

    2010-12-01

    On April 14th 2010, a disastrous earthquake (Ms 7.1) struck Yushu County, Qinghai Province, China, killing thousands of people. This earthquake occurred as a result of sinistral strike-slip faulting on the western segment of the Xianshuihe Fault zone in eastern Tibetan Plateau. Our group conducted scientific investigation in the field on co-seismic surface rupture and active tectonics in the epicenter area immediately after the earthquake. Here, we introduce our preliminary results on the surface ruptures and rupture mechanics of the Yushu Earthquake. The surface rupture zone of Yushu earthquake, which is about 49 km-long, consists of 3 discontinuous left stepping rupture segments, which are 19 km, 22 km, and about 8 km, respectively, from west to east. Each segment consists of a series of right stepping en-echelon branch ruptures. The branch ruptures consist of interphase push-up and tension fissures or simply en-echelon tension fissures. The co-seismic displacements had been surveyed with a total station in detail on landmarks such as rivers, gullies, roads, farmlands, wire poles, and fences. The maximum offset measured is 2.3m, located near the Guoyangyansongduo Village. There are 3 offset peaks along the rupture zone corresponding to the 3 segments of the surface rupture zone. The maximum offsets in the west, central, and east segment rupture zones are 1.4m, 2.3m, and 1.6m respectively. The surface rupture zone of Yushu earthquake strikes in a 310°NW direction. The fault plane dips to the northeast and the dip angle is about 81°. The rupture zone is developed in transtension setting. Tension normal fault developed during the sinistral strike-slip process of the fault. The valley west of Yushu City and the Longbao Lake are both pull-apart basins formed during the transtension activity of the fault.

  3. Mycobacterial nicotinate mononucleotide adenylyltransferase: Structure, mechanism, and implications for drug discovery

    DOE PAGES

    Rodionova, Irina A.; Zuccola, Harmon J.; Sorci, Leonardo; ...

    2015-01-28

    Nicotinate mononucleotide adenylyltransferase NadD is an essential enzyme in the biosynthesis of the NAD cofactor, which has been implicated as a target for developing new antimycobacterial therapies. Here we report the crystal structure of Mycobacterium tuberculosis NadD ( MtNadD) at a resolution of 2.4 Å. A remarkable new feature of the MtNadD structure, compared with other members of this enzyme family, is a 310 helix that locks the active site in an over-closed conformation. As a result, MtNadD is rendered inactive as it is topologically incompatible with substrate binding and catalysis. Directed mutagenesis was also used to further dissect themore » structural elements that contribute to the interactions of the two MtNadD substrates, i.e. ATP and nicotinic acid mononucleotide (NaMN). For inhibitory profiling of partially active mutants and wild type MtNadD, we used a small molecule inhibitor of MtNadD with moderate affinity ( Ki ~ 25 μM) and antimycobacterial activity (MIC 80) ~ 40-80 μM). This analysis revealed interferences with some of the residues in the NaMN binding subsite consistent with the competitive inhibition observed for the NaMN substrate (but not ATP). A detailed steady-state kinetic analysis of MtNadD suggests that ATP must first bind to allow efficient NaMN binding and catalysis. This sequential mechanism is consistent with the requirement of transition to catalytically competent (open) conformation hypothesized from structural modeling. A possible physiological significance of this mechanism is to enable the down-regulation of NAD synthesis under ATP-limiting dormancy conditions. Lastly, these findings point to a possible new strategy for designing inhibitors that lock the enzyme in the inactive over-closed conformation.« less

  4. Air travel and adults with cyanotic congenital heart disease.

    PubMed

    Harinck, E; Hutter, P A; Hoorntje, T M; Simons, M; Benatar, A A; Fischer, J C; de Bruijn, D; Meijboom, E J

    1996-01-15

    Concern has been expressed that a reduction of partial oxygen pressure during flight in commercial aircraft may induce dangerous hypoxemia in patients with cyanotic congenital heart disease. To evaluate the validity of this concern, the transcutaneous SaO2 was measured in 12 adults with this type of heart disease and 27 control subjects during simulated commercial flights of 1.5 and 7 hours in a hypobaric chamber. Ten of those patients and 6 control subjects also were evaluated during two actual flights of approximately 2.5 hours in a DC-10 and an A-310, respectively. During the prolonged simulated and actual flights, the capillary blood pH, gases, and lactic acid were analyzed in the patients and during one of the actual flights also in the control subjects. During the simulated flights the SaO2 was at all times lower in the patients than in the control subjects. However, the maximal mean actual percentage decrease, as compared with sea level values, did not exceed 8.8% in either patients or control subjects. During the actual flights, this maximal decrease in the patients was 6%. In-flight reduction of the capillary PO2 was considerable in the control subjects but not in the patients. It is our hypothesis that the lack of a significant decrease of the PO2 in the patients might possibly be due to a high concentration of 2.3 diphosphoglycerate in the red cells. The flights had no influence on the capillary blood pH, PCO2, bicarbonate, or lactic acid levels in either patients or control subjects. Atmospheric pressure changes during commercial air travel do not appear to be detrimental to patients with cyanotic congenital heart disease.

  5. Phylodynamic analysis of porcine circovirus type 2: Methodological approach and datasets.

    PubMed

    Franzo, Giovanni; Cortey, Martì; Segalés, Joaquim; Hughes, Joseph; Drigo, Michele

    2016-09-01

    Since its first description, PCV2 has emerged as one of the most economically relevant diseases for the swine industry. Despite the introduction of vaccines effective in controlling clinical syndromes, PCV2 spread was not prevented and some potential evidences of vaccine immuno escape have recently been reported ("Complete genome sequence of a novel porcine circovirus type 2b variant present in cases of vaccine failures in the United States" (Xiao and Halbur, 2012) [1], "Genetic and antigenic characterization of a newly emerging porcine circovirus type 2b mutant first isolated in cases of vaccine failure in Korea" (Seo et al., 2014) [2]). In this article, we used a collection of PCV2 full genomes, provided in the present manuscript, and several phylogentic, phylodynamic and bioinformatic methods to investigate different aspects of PCV2 epidemiology, history and evolution (more thoroughly described in "PHYLODYNAMIC ANALYSIS of PORCINE CIRCOVIRUS TYPE 2 REVEALS GLOBAL WAVES of EMERGING GENOTYPES and the CIRCULATION of RECOMBINANT FORMS"[3]). The methodological approaches used to consistently detect recombiantion events and estimate population dymanics and spreading patterns of rapidly evolving ssDNA viruses are herein reported. Programs used are described and original scripts have been provided. Ensembled databases used are also made available. These consist of a broad collection of complete genome sequences (i.e. 843 sequences; 63 complete genomes of PCV2a, 310 of PCV2b, 4 of PCV2c, 217 of PCV2d, 64 of CRF01, 140 of CRF02 and 45 of CRF03.), divided in differnt ORF (i.e. ORF1, ORF2 and intergenic regions), of PCV2 genotypes and major Circulating Recombinat Forms (CRF) properly annotated with respective collection data and country. Globally, all of these data can be used as a starting point for further studies and for classification purpose.

  6. Chronic wasting disease infection patterns in female white-tailed deer related to demographics, genetic relationships, and spatial proximity of infected deer in southern Wisconsin

    USGS Publications Warehouse

    Grear, Daniel A.

    2006-01-01

    Chronic wasting disease (CWD) is a fatal disease of white-tailed deer (Odocoileus virginianus) caused by transmissible protease resistant prions. Since the discovery of CWD in southern Wisconsin in 2001, more than 20,000 deer have been removed from a >2,500 km2 disease eradication zone surrounding the three initial cases. Nearly all deer removed were tested for CWD infection and sex, age, and harvest location were recorded. Our analysis used data from a 310 kin2 core study area where disease prevalence was higher than surrounding areas. We found no difference in harvest rates between CWD infected and non-infected deer. Ow results show that the probability of infection increased with age and that adult males were more likely to be infected than adult females. Six fawns tested positive for CWD, five fawns from the core study area, including the youngest (5 months) kee-ranging cervid to test positive. The increase in male prevalence with age is nearly twice the increase found in females. We concluded that CWD is not randomly distributed among deer and that differential transmission among sex and age classes is likely driving the observed patterns in disease prevalence. We discuss alternative hypotheses for CWD transmission and spread and, in addition, discuss several possible non-linear relationships between prevalence and age. Understanding CWD transmission in free-ranging cervid populations will be essential to the development of strategies to manage this disease in areas where CWD is found as well as for surveillance strategies in areas where CWD threatens to spread.

  7. Exploring the Mechanism of Zanamivir Resistance in a Neuraminidase Mutant: A Molecular Dynamics Study

    PubMed Central

    Han, Nanyu; Liu, Xuewei; Mu, Yuguang

    2012-01-01

    It is critical to understand the molecular basis of the drug resistance of influenza viruses to efficiently treat this infectious disease. Recently, H1N1 strains of influenza A carrying a mutation of Q136K in neuraminidase were found. The new strain showed a strong Zanamivir neutralization effect. In this study, normal molecular dynamics simulations and metadynamics simulations were employed to explore the mechanism of Zanamivir resistance. The wild-type neuraminidase contained a 310 helix before the 150 loop, and there was interaction between the 150 and 430 loops. However, the helix and the interaction between the two loops were disturbed in the mutant protein due to interaction between K136 and nearby residues. Hydrogen-bond network analysis showed weakened interaction between the Zanamivir drug and E276/D151 on account of the electrostatic interaction between K136 and D151. Metadynamics simulations showed that the free energy landscape was different in the mutant than in the wild-type neuraminidase. Conformation with the global minimum of free energy for the mutant protein was different from the wild-type conformation. While the drug fit completely into the active site of the wild-type neuraminidase, it did not match the active site of the mutant variant. This study indicates that the altered hydrogen-bond network and the deformation of the 150 loop are the key factors in development of Zanamivir resistance. Furthermore, the Q136K mutation has a variable effect on conformation of different N1 variants, with conformation of the 1918 N1 variant being more profoundly affected than that of the other N1 variants studied in this paper. This observation warrants further experimental investigation. PMID:22970161

  8. High mobility, dual layer, c-axis aligned crystalline/amorphous IGZO thin film transistor

    NASA Astrophysics Data System (ADS)

    Chung, Chen-Yang; Zhu, Bin; Greene, Raymond G.; Thompson, Michael O.; Ast, Dieter G.

    2015-11-01

    We demonstrate a dual layer IGZO thin film transistor (TFT) consisting of a 310 °C deposited c-axis aligned crystal (CAAC) 20 nm thick channel layer capped by a second, 30 nm thick, 260 °C deposited amorphous IGZO layer. The TFT exhibits a saturation field-effect mobility of ˜20 cm2/V s, exceeding the mobility of 50 nm thick single layer reference TFTs fabricated with either material. The deposition temperature of the second layer influences the mobility of the underlying transport layer. When the cap layer is deposited at room temperature (RT), the mobility in the 310 °C deposited CAAC layer is initially low (6.7 cm2/V s), but rises continuously with time over 58 days to 20.5 cm2/V s, i.e., to the same value as when the second layer is deposited at 260 °C. This observation indicates that the two layers equilibrate at RT with a time constant on the order of 5 × 106 s. An analysis based on diffusive transport indicates that the room temperature diffusivity must be of the order of 1 × 10-18 cm2 s-1 with an activation enthalpy EA < 0.2 eV for the mobility limiting species. The findings are consistent with a hypothesis that the amorphous layer deposited on top of the CAAC has a higher solubility for impurities and/or structural defects than the underlying nanocrystalline transport layer, and that the equilibration of the mobility limiting species is rate limited by hydrogen diffusion, whose known diffusivity fits these estimates.

  9. Evaluation of water resources in the Reedsport area, Oregon

    USGS Publications Warehouse

    Rinella, Joseph F.; Frank, F.J.; Leonard, A.R.

    1980-01-01

    The water supply for the Reedsport area is obtained from Clear Lake, a 310-acre coastal lake that contains 16, 600 acre-feet of water at full-pool. The lake receives about 6,000 acre-feet of water annually from runoff and direct precipitation, and it loses about 600 acre-feet by evaporation. The 2,100 acre-feet diverted annually for public supply is about two-thirds of the ' usable storage capacity ' of the lake volume above the water-supply outlet pipe. Clear Lake is classified as a warm monomictic lake; that is, it is thermally stratified except during winter. The water of Clear Lake is of the sodium chloride type and is low in dissolved solids and nutrients. The water is considered to be of good quality for public supply, on the basis of biological and chemical constituents analyzed, which include trace elements pesticides, and organic material. The only ground-water source with potential to supply the needs of the Reedsport area is the dune sand-marine aquifer between U.S. Highway 101 and the coast. That aquifer consists largely of medium- to fine-grained sand with a variable saturated thickness of at least 90 feet. The aquifer is estimated to contain at least 12 billion gallons of water and to receive annual recharge from precipitation equivalent to 10 million gallons per day. Wells in the most productive part of the aquifer could be expected to yield a few hundred gallons per minute. The only identified water-quality problem is excessive iron reported in water from some wells. Either Clear Lake or the major aquifer could supply the Reedsport area 's aticipated year 2000 need of about 2.4 million gallons per day. 

  10. Functional evolution of scorpion venom peptides with an inhibitor cystine knot fold.

    PubMed

    Gao, Bin; Harvey, Peta J; Craik, David J; Ronjat, Michel; De Waard, Michel; Zhu, Shunyi

    2013-06-27

    The ICK (inhibitor cystine knot) defines a large superfamily of polypeptides with high structural stability and functional diversity. Here, we describe a new scorpion venom-derived K+ channel toxin (named λ-MeuKTx-1) with an ICK fold through gene cloning, chemical synthesis, nuclear magnetic resonance spectroscopy, Ca2+ release measurements and electrophysiological recordings. λ-MeuKTx-1 was found to adopt an ICK fold that contains a three-strand anti-parallel β-sheet and a 310-helix. Functionally, this peptide selectively inhibits the Drosophila Shaker K+ channel but is not capable of activating skeletal-type Ca2+ release channels/ryanodine receptors, which is remarkably different from the previously known scorpion venom ICK peptides. The removal of two C-terminal residues of λ-MeuKTx-1 led to the loss of the inhibitory activity on the channel, whereas the C-terminal amidation resulted in the emergence of activity on four mammalian K+ channels accompanied by the loss of activity on the Shaker channel. A combination of structural and pharmacological data allows the recognition of three putative functional sites involved in channel blockade of λ-MeuKTx-1. The presence of a functional dyad in λ-MeuKTx-1 supports functional convergence among scorpion venom peptides with different folds. Furthermore, similarities in precursor organization, exon-intron structure, 3D-fold and function suggest that scorpion venom ICK-type K+ channel inhibitors and Ca2+ release channel activators share a common ancestor and their divergence occurs after speciation between buthidae and non-buthids. The structural and functional characterizations of the first scorpion venom ICK toxin with K+ channel-blocking activity sheds light on functionally divergent and convergent evolution of this conserved scaffold of ancient origin.

  11. Microgravity Active Vibration Isolation System on Parabolic Flights

    NASA Astrophysics Data System (ADS)

    Dong, Wenbo; Pletser, Vladimir; Yang, Yang

    2016-07-01

    The Microgravity Active Vibration Isolation System (MAIS) aims at reducing on-orbit vibrations, providing a better controlled lower gravity environment for microgravity physical science experiments. The MAIS will be launched on Tianzhou-1, the first cargo ship of the China Manned Space Program. The principle of the MAIS is to suspend with electro-magnetic actuators a scientific payload, isolating it from the vibrating stator. The MAIS's vibration isolation capability is frequency-dependent and a decrease of vibration of about 40dB can be attained. The MAIS can accommodate 20kg of scientific payload or sample unit, and provide 30W of power and 1Mbps of data transmission. The MAIS is developed to support microgravity scientific experiments on manned platforms in low earth orbit, in order to meet the scientific requirements for fluid physics, materials science, and fundamental physics investigations, which usually need a very quiet environment, increasing their chances of success and their scientific outcomes. The results of scientific experiments and technology tests obtained with the MAIS will be used to improve future space based research. As the suspension force acting on the payload is very small, the MAIS can only be operative and tested in a weightless environment. The 'Deutsches Zentrum für Luft- und Raumfahrt e.V.' (DLR, German Aerospace Centre) granted a flight opportunity to the MAIS experiment to be tested during its 27th parabolic flight campaign of September 2015 performed on the A310 ZERO-G aircraft managed by the French company Novespace, a subsidiary of the 'Centre National d'Etudes Spatiales' (CNES, French Space Agency). The experiment results confirmed that the 6 degrees of freedom motion control technique was effective, and that the vibration isolation performance fulfilled perfectly the expectations based on theoretical analyses and simulations. This paper will present the design of the MAIS and the experiment results obtained during the

  12. XMAP310: A Xenopus Rescue-promoting Factor Localized to the Mitotic Spindle

    PubMed Central

    Andersen, Søren S.L.; Karsenti, Eric

    1997-01-01

    To understand the role of microtubule-associated proteins (MAPs) in the regulation of microtubule (MT) dynamics we have characterized MAPs prepared from Xenopus laevis eggs (Andersen, S.S.L., B. Buendia, J.E. Domínguez, A. Sawyer, and E. Karsenti. 1994. J. Cell Biol. 127:1289–1299). Here we report on the purification and characterization of a 310-kD MAP (XMAP310) that localizes to the nucleus in interphase and to mitotic spindle MTs in mitosis. XMAP310 is present in eggs, oocytes, a Xenopus tissue culture cell line, testis, and brain. We have purified XMAP310 to homogeneity from egg extracts. The purified protein cross-links pure MTs. Analysis of the effect of this protein on MT dynamics by time-lapse video microscopy has shown that it increases the rescue frequency 5–10-fold and decreases the shrinkage rate twofold. It has no effect on the growth rate or the catastrophe frequency. Microsequencing data suggest that XMAP230 and XMAP310 are novel MAPs. Although the three Xenopus MAPs characterized so far, XMAP215 (Vasquez, R.J., D.L. Gard, and L. Cassimeris. 1994. J. Cell Biol. 127:985–993), XMAP230, and XMAP310 are localized to the mitotic spindle, they have distinct effects on MT dynamics. While XMAP215 promotes rapid MT growth, XMAP230 decreases the catastrophe frequency and XMAP310 increases the rescue frequency. This may have important implications for the regulation of MT dynamics during spindle morphogenesis and chromosome segregation. PMID:9362515

  13. Down-State Model of the Voltage-Sensing Domain of a Potassium Channel

    PubMed Central

    Schow, Eric V.; Freites, J. Alfredo; Gogna, Karun; White, Stephen H.; Tobias, Douglas J.

    2010-01-01

    Abstract Voltage-sensing domains (VSDs) of voltage-gated potassium (Kv) channels undergo a series of conformational changes upon membrane depolarization, from a down state when the channel is at rest to an up state, all of which lead to the opening of the channel pore. The crystal structures reported to date reveal the pore in an open state and the VSDs in an up state. To gain insights into the structure of the down state, we used a set of experiment-based restraints to generate a model of the down state of the KvAP VSD using molecular-dynamics simulations of the VSD in a lipid bilayer in excess water. The equilibrated VSD configuration is consistent with the biotin-avidin accessibility and internal salt-bridge data used to generate it, and with additional biotin-avidin accessibility data. In the model, both the S3b and S4 segments are displaced ∼10 Å toward the intracellular side with respect to the up-state configuration, but they do not move as a rigid body. Arginine side chains that carry the majority of the gating charge also make large excursions between the up and down states. In both states, arginines interact with water and participate in salt bridges with acidic residues and lipid phosphate groups. An important feature that emerges from the down-state model is that the N-terminal half of the S4 segment adopts a 310-helical conformation, which appears to be necessary to satisfy a complex salt-bridge network. PMID:20550898

  14. Surveying the Hydrogen Bonding Landscape of AN Achiral, α-AMINO Acid: Conformation Specific IR and UV Spectroscopy of 2-AMINOISOBUTYRIC Acid

    NASA Astrophysics Data System (ADS)

    Gord, Joseph R.; Hewett, Daniel M.; Kubasik, Matthew A.; Zwier, Timothy S.

    2014-06-01

    2-Aminoisobutyric acid (Aib) is an achiral, α-amino acid having two equivalent methyl groups attached to Cα. Extended Aib oligomers are known to preferentially adopt a 310-helical structure in the condensed phase. Here, we take a simplifying step and focus on the intrinsic folding propensities of Aib by looking at a single, capped Aib structure and then extending to longer oligomers in the gas phase, free from the influence of solvent molecules and cooled in a supersonic expansion. Resonant two-photon ionization and IR-UV holeburning will be used to record single-conformation UV spectra using the Z-cap as UV chromophore. Resonant ion-dip infrared (RIDIR) spectroscopy provides single-conformation IR spectra in the OH stretch, NH stretch, amide I and amide II regions. Two conformational isomers have been identified for the smallest unit in the study, Z-Aib-OH, and four conformational isomers were seen for Z-Aib-Aib-OH, with widely-varying IR spectral patterns. In addition to investigating the conformational dependence on oligomer length, this work also studies the steric and electrostatic impact of different capping groups, R-X where X = -OH, -OMethyl, and -OtButyl. These caps are considered here for the case of Z-Aib-Aib-X. Extension to larger Z-(Aib)n-X oligomers will shed light on the extent to which the solution phase preference for 310-helix formation is retained in the gas phase, and when its onset first appears. When possible 13C isotopomers will be used to assist with the assignments and modulate the coupling between amide I fundamentals. Toniolo, C.; Bonora, G. M.; Barone, V.; Bavoso, A.; Benedetti, E.; Di Blasio, B.; Grimaldi, P.; Lelj, F.; Pavone, V.; Padone, C., Conformation of Pleionomers of α-Aminoisobutyric Acid. Macromolecules 1985, 18, 895-902.

  15. Assessing the Impact of Backbone Length and Capping Agent on the Conformational Preferences of a Model Peptide: Conformation Specific IR and UV Spectroscopy of 2-AMINOISOBUTYRIC Acid

    NASA Astrophysics Data System (ADS)

    Gord, Joseph R.; Hewett, Daniel M.; Kubasik, Matthew A.; Zwier, Timothy S.

    2015-06-01

    2-Aminoisobutyric acid (Aib) is an achiral, α-amino acid having two equivalent methyl groups attached to C_α. Extended Aib oligomers are known to have a strong preference for the adoption of a 310-helical structure in the condensed phase. Here, we have taken a simplifying step and focused on the intrinsic folding propensities of Aib by looking at a series of capped Aib oligomers in the gas phase, free from the influence of solvent molecules and cooled in a supersonic expansion. Resonant two-photon ionization and IR-UV holeburning have been used to record single-conformation UV spectra using the Z-cap as the UV chromophore. Resonant ion-dip infrared (RIDIR) spectroscopy provides single-conformation IR spectra in the OH stretch and NH stretch regions. Data have been collected on a set of Z-(Aib)n-X oligomers with n = 1, 2, 4, 6 and X = -OH and -OMethyl. The impacts of these capping groups and differences in backbone length have been found to dramatically influence the conformational space accessed by the molecules studied here. Oligomers of n=4 have sufficient backbone length for a full turn of the 310-helix to be formed. Early interpretation of the data collected shows clear spectroscopic markers signaling the onset of 310-helix formation as well as evidence of structures incorporating C7 and C14 hydrogen bonded rings. Toniolo, C.; Bonora, G. M.; Barone, V.; Bavoso, A.; Benedetti, E.; Di Blasio, B.; Grimaldi, P.; Lelj, F.; Pavone, V.; Pedone, C., Conformation of Pleionomers of α-Aminoisobutyric Acid. Macromolecules 1985, 18, 895-902.

  16. Tire footprint studies

    NASA Technical Reports Server (NTRS)

    Chawla, Mangal; Medzorian, John

    1995-01-01

    This presentation covers the results of tire footprint studies conducted in the Landing Gear Development Facility of the USAF Wright Laboratory at the Wright Patterson Air force Base, OH. Tire footprint studies are essential in understanding tire wear mechanisms and computing tire tread wear rates. The power input into the tread is the driving force for tread wear. Variables needed for power input calculations include the footprint pressure and slip velocity distributions. Studies were performed on the effects of power input distributions due to vertical load, camber, yaw, inflation pressure, and tire construction. For the present study, two tire constructions, one radial and the other bias, were selected. These tires were for the F-16 Block 30 fighter aircraft, both of which were previously worn. The present study was limited to steady straight roll with a 14,000 lb vertical load, a 310 psi inflation pressure, and zero yaw and camber. All tests were conducted on the Tire Force Machine (TFM) with a specialized sensor plate with embedded pressure sensors (X, Y, and Z) and slip sensors (X and Y). All tests were conducted for a table speed of 1 in/s. Tests on the TFM show that the power intensity distributions and total power for both tire constructions are quite similar for straight roll. Later on, tests were also conducted on a modified dynamometer which was overlaid with a grit wear surface. The tire speed was maintained at 40 miles per hour and yaw was set to four degrees. Dynamometer tests showed that radial tires have more tread wear than the bias tire; however, in the field, radial tires have longer life.

  17. Pollen-based reconstruction of vegetational and climatic change over the past ~30 ka at Shudu Lake in the Hengduan Mountains of Yunnan, southwestern China.

    PubMed

    Yao, Yi-Feng; Song, Xiao-Yan; Wortley, Alexandra H; Wang, Yu-Fei; Blackmore, Stephen; Li, Cheng-Sen

    2017-01-01

    The Hengduan Mountains, with a distinct altitudinal differentiation and strong vertical vegetation zonation, occupy an important position in southwestern China as a global hotspot of biodiversity. Pollen analysis of lake sediments sampled along an altitudinal gradient in this region helps us to understand how this vegetation zonation arose and how it has responded to climate change and human impacts through time. Here we present a ~30-ka pollen record and interpret it in terms of vegetational and climatic change from a 310 cm-long core from Shudu Lake, located in the Hengduan Mountains region. Our results suggest that from 30 to 22 cal. ka BP, the vegetation was dominated by steppe/grassland (comprising mainly Artemisia, Poaceae and Polygonaceae) and broad-leaved forest (primarily Quercus, Betula and Castanopsis) in the lake catchment, reflecting a relatively warm, wet climate early in this phase and slightly warmer, drier conditions late in the phase. The period between 22 and 13.9 cal. ka BP was marked by a large expansion of needle- and broad-leaved mixed forest (Pinus, Abies and Quercus) and a decline in the extent of steppe/grassland, indicating warming, drying climatic conditions followed by a cold, wet period. Between 13.9 and 3 cal. ka BP, steppe/grassland expanded and the area covered by needle- and broad-leaved mixed forest reduced, implying a fluctuating climate dominated by warm and humid conditions. After 3 cal. ka BP, the vegetation was characterized by an increase in needle-leaved forest and reduction in steppe/grassland, suggesting warming and drying climate. A synthesis of palynological investigations from this and other sites suggests that the vegetation succession patterns seen along an altitudinal gradient in northwestern Yunnan since the Late Pleistocene are comparable, but that each site has its own characteristics probably due to the influences of altitude, topography, microclimate and human impact.

  18. Benefits of Low-Power Electrothermal Propulsion

    NASA Technical Reports Server (NTRS)

    Oleson, Steven R.; Sankovic, John M.

    1997-01-01

    Mission analyses were completed to show the benefits of low-power electrothermal propulsion systems for three classes'of LEO smallsat missions. Three different electrothermal systems were considered: (1) a 40 W ammonia resistojet system, (2) a 600 W hydrazine arcjet system, and (3) a 300 W ammonia resistojet. The benefits of using two 40 W ammonia resistojet systems were analyzed for three months of drag makeup of a Shuttle-launched 100 kg spacecraft in a 297 km orbit. The two 46 W resistojets decreased the propulsion system wet mass by 50% when compared to state-of-art hydrazine monopropellant thrusters. The 600 W arcjet system was used for a 300 km sun synchronous makeup mission of a 1000 kg satellite and was found to decrease the wet propulsion mass by 30%. Finally, the 300 W arcjet system was used on a 200 kg Earth-orbiting spacecraft for both orbit transfer from 300 to 400 km, two years of drag makeup, and a final orbit rise to 700 km. The arcjet system was determined to halve the propulsion system wet mass required for that scenario as compared to hydrazine monopropellant thrusters.

  19. Simultaneous application of ethylene and 1-MCP affects banana ripening features during storage.

    PubMed

    Botondi, Rinaldo; De Sanctis, Federica; Bartoloni, Serena; Mencarelli, Fabio

    2014-08-01

    In order to avoid the ripening blocking effect of 1-MCP (1-methylcyclopropene) on bananas when applied before ethylene commercial treatment, 1-MCP in combination with 'CD ethylene' (ethylene-cyclodextrin complex) was used in gas formulations: 300 nmol mol(-1) 1-MCP + 1200, 2400 or 4800 nmol mol(-1) ethylene (ETH). Control bananas received 1-MCP alone or 4800 nmol mol(-1) ethylene alone or no treatment. Treatments were done on overseas shipped bananas, at 14 °C, 90% relative humidity (RH), for 16 h; the bananas were stored under the same atmospheric conditions. After 4 or 12 days the bananas were commercially treated with 500 µmol mol(-1) ethylene. A 300 nmol mol(-1) 1-MCP treatment significantly blocked banana ripening in terms of physiological and technological parameters, inhibiting ethylene production and respiration, despite the commercial ethylene treatment. The application of 300 nmol mol(-1) 1-MCP + 1200 or 2400 nmol mol(-1) ethylene delayed ripening but with a regular pattern. A 300 nmol mol(-1) 1-MCP + 4800 nmol mol(-1) ethylene application did not delay ripening as did 4800 nmol mol(-1) ethylene treatment. The development of black spots was closely associated with advanced ripening/senescence of fruits. The combined 300 nmol mol(-1) 1-MCP + 1200 or 2400 nmol mol(-1) ethylene treatment appears to be a promising treatment to extend banana storage, following overseas shipping. © 2014 Society of Chemical Industry.

  20. Short duration microgravity experiments in physical and life sciences during parabolic flights: the first 30 ESA campaigns.

    PubMed

    Pletser, Vladimir

    2004-11-01

    Aircraft parabolic flights provide repetitively up to 20 s of reduced gravity during ballistic flight manoeuvres. Parabolic flights are used to conduct short microgravity investigations in Physical and Life Sciences, to test instrumentation and to train astronauts before a space flight. The European Space Agency (ESA) has organized since 1984 thirty parabolic flight campaigns for microgravity research experiments utilizing six different airplanes. More than 360 experiments were successfully conducted during more than 2800 parabolas, representing a cumulated weightlessness time of 15 h 30 m. This paper presents the short duration microgravity research programme of ESA. The experiments conducted during these campaigns are summarized, and the different airplanes used by ESA are shortly presented. The technical capabilities of the Airbus A300 'Zero-G' are addressed. Some Physical Science, Technology and Life Science experiments performed during the last ESA campaigns with the Airbus A300 are presented to show the interest of this unique microgravity research tool to complement, support and prepare orbital microgravity investigations. c2004 Elsevier Ltd. All rights reserved.

  1. RF priming of a long pulse relativistic magnetron

    NASA Astrophysics Data System (ADS)

    White, William Michael

    Rapid startup, increased pulsewidth and mode locking of magnetrons have been demonstrated experimentally on a relativistic magnetron by radio frequency (RF) priming. Experiments utilize a -300 kV, 2-8 kA, 300-500 ns electron beam to drive a Titan 6-vane relativistic magnetron (˜100 MW output power). The RF priming source is a 100 kW pulsed magnetron operating at 1.27-1.32 GHz. Tuning stubs were utilized in the Titan structure to adjust the operating frequency of the relativistic magnetron pi-mode upward by 30%. The tuning was guided by simulation in the MAGIC 3D code and experimental cold tests including a mapping of the azimuthal electric field inside the relativistic magnetron structure. The most successful tuning geometry was that of a standard anode resonant structure, but RF priming experiments were performed on a rising-sun structure as well. The Time Frequency Analysis (TFA) program was used to directly observe the effects of RF priming on the relativistic magnetron. RF priming was successful in decreasing mode competition by suppressing the generation of the 2pi/3-mode power by 41%. RF priming experiments were also successful in increasing microwave pulsewidth by 12% and decreasing microwave output delay by 22%. These improvements were observed while operating in a priming regime not satisfying Adler's Relation. Overall, the improvements made to the performance of the relativistic magnetron were modest because of the low priming power available (50-250 kW).

  2. Electrokinetic migration across artificial liquid membranes Tuning the membrane chemistry to different types of drug substances.

    PubMed

    Gjelstad, Astrid; Rasmussen, Knut Einar; Pedersen-Bjergaard, Stig

    2006-08-18

    Twenty different basic drugs were electrokinetically extracted across a thin artificial organic liquid membrane with a 300 V d.c. electrical potential difference as the driving force. From a 300 microl aqueous sample (acidified corresponding to 10mM HCl), the drugs were extracted for 5 min through a 200 microm artificial liquid membrane of a water immiscible organic solvent immobilized in the pores of a polypropylene hollow fiber, and into a 30 microl aqueous acceptor solution of 10mM HCl inside the lumen of the hollow fiber. Hydrophobic basic drugs (logP>1.7) were effectively isolated utilizing 2-nitrophenyl octyl ether (NPOE) as the artificial liquid membrane, with recoveries up to 83%. For more hydrophilic basic drugs (logP<1.0), a mixture of NPOE and 25% (w/w) di-(2-ethylhexyl) phosphate (DEHP) was required to ensure efficient extraction, resulting in recoveries up to 75%. DEHP was expected to act as an ion-pair reagent ion-pairing the protonated hydrophilic drugs at the interface between the sample and the membrane, resulting in permeation of the interface.

  3. Field trial of rural solar photovoltaic system

    NASA Astrophysics Data System (ADS)

    Basu, P.; Mukhopadhyay, K.; Banerjee, T.; Das, S.; Saha, H.

    Experience, costs, and performance of photovoltaic (PV) systems set up in a remote Indian village to power an adult literacy center and an irrigation pump are described. The center was furnished with a 14-module, 200 W array to power a television and three fluorescent lamps. The pumping installation has 20 modules for a 300 W output directly coupled to a 300-W dc pump motor. Data were gathered on the open circuit voltage, short circuit current, specific gravity of the battery fluid, degradation of the cells, nominal operating temperature of the cells, load currents, Amp-hours, water flow rate (pump), and the static head and draw down rate (pump). Monitoring of the array performances in the dusty environment showed that once/week cleaning is necessary. Al-substrates cracked at the center installation and sealant evaporation caused condensation which degraded the light transmissivity and thereby the short-circuit current of the modules. The combination of low-efficiency (5 pct) cells and cheap labor demonstrated economic operation without high-efficiency cells.

  4. Incentive or Habit Learning in Amphibians?

    PubMed Central

    Muzio, Rubén N.; Pistone Creydt, Virginia; Iurman, Mariana; Rinaldi, Mauro A.; Sirani, Bruno; Papini, Mauricio R.

    2011-01-01

    Toads (Rhinella arenarum) received training with a novel incentive procedure involving access to solutions of different NaCl concentrations. In Experiment 1, instrumental behavior and weight variation data confirmed that such solutions yield incentive values ranging from appetitive (deionized water, DW, leading to weight gain), to neutral (300 mM slightly hypertonic solution, leading to no net weight gain or loss), and aversive (800 mM highly hypertonic solution leading to weight loss). In Experiment 2, a downshift from DW to a 300 mM solution or an upshift from a 300 mM solution to DW led to a gradual adjustment in instrumental behavior. In Experiment 3, extinction was similar after acquisition with access to only DW or with a random mixture of DW and 300 mM. In Experiment 4, a downshift from DW to 225, 212, or 200 mM solutions led again to gradual adjustments. These findings add to a growing body of comparative evidence suggesting that amphibians adjust to incentive shifts on the basis of habit formation and reorganization. PMID:22087217

  5. Low-Cost Production of Composite Bushings for Jet Engine Applications

    NASA Technical Reports Server (NTRS)

    Gray, Robert A.

    1998-01-01

    The objectives of this research program were to reduce the manufacturing costs of variable stator vane bushings by 1) eliminating the expensive carbon fiber braiding operation, 2) replacing the batch mode impregnation, B-stage, and cutting operations with a continuous process, and 3) reducing the molding cycle and machining operations with injection molding to achieve near-net shapes. Braided bushings were successfully fabricated with both AMB-17XLD and AMB-TPD resin systems. The composite bushings achieved high glass transition temperature after post-cure (+300 C) and comparable weight loss to the PNM-15 bushings. ANM-17XLD bushings made with "batch-mode" molding compound (at 0.5 in. fiber length) achieved a +300 lb-force flange break strength which was superior to the continuous braided-fiber reinforced bushing. The non-MDA resin technology developed in this contract appears attractive for bushing applications that do not exceed a 300 C use temperature. Two thermoplastic polyimide resins were synthesized in order to generate injection molding compound powders. Excellent processing results were obtained at injection temperatures in excess of 300 C. Micro-tensile specimens were produced from each resin type and the Tg measurements (by TMA) for these samples were equivalent to AURUM(R). Thermal Gravimetric Analysis (TGA) conducted at 10 C/min showed that the non-MDA AMB-type polyimide thermoplastics had comparable weight loss to PMR-15 up to 500 C.

  6. Orofacial lymphatic malformation: management with a three steps diode laser protocol

    NASA Astrophysics Data System (ADS)

    Miccoli, Simona; Tempesta, Angela; Limongelli, Luisa; Caporusso, Concetta; Di Venere, Daniela; Petruzzi, Massimo; Lacaita, Mariagrazia; Maiorano, Eugenio; Favia, Gianfranco

    2014-01-01

    Lymphatic Malformation (LM) according to ISSVA Classification, is a rare benign disorder with unknown aetiology. LM may grow slowly over years or develop rapidly over the course of days becoming a bulky lump, infected or bleeding. We propose our three steps Diode Laser protocol for LM management, based on its persistent vascular blood component. 1. Histological and cytological examination, to evaluate the vascular blood component (10-40%), shows mature lymphocytes with red blood cells and endothelial cells. 2. Diode Laser Photocoagulation (DLP) in pulsed mode (on 100ms / off 400ms) at 10W and 800nm with a 300μm fibre kept 2-3mm from the tissues, to reduce the lesion. 3. Diode Laser surgical excision in pulsed mode (on 50ms / off 200ms) at 8W and 800nm with a 300 μm fibre in close contact with tissues, and histological intraoperative margins control on frozen sections. Even if it has inconstant results (lesions decreasing rate is 10% to 40% proportionally to vascular blood component), DLP simplifies the last and the most important step. Use of Diode Laser also in surgical excision reduces intra and postoperatory complications.

  7. Survey of bat populations from Mexico and Paraguay for rabies.

    PubMed

    Sheeler-Gordon, L L; Smith, J S

    2001-07-01

    A mammalian survey was conducted in Mexico (October 1994-January 1996) and in Paraguay (August 1996-March 1997); a complete specimen was collected for each bat in the survey, including primary voucher specimen, ectoparasites, karyotype, and various frozen tissues. The surveys combined provided 937 brain samples (65 bat species) for rabies diagnosis. One male Lasiurus ega, collected in Paraguay, tested positive for the rabies virus (overall prevalence rate of 0.1%). Nucleotide sequence from a 300 bp region of the rabies nucleoprotein gene was compared with sequence obtained from representative rabies virus samples in the repository at the Centers for Disease Control and Prevention (Atlanta, Georgia, USA). Rabies virus extracted from the brain material of L. ega differed by only one nucleotide from a 300 bp consensus sequence (>99% homology) derived from samples for the variant of rabies virus transmitted by Lasiurus cinereus. Lasiurus ego differed by approximately 15% for the variant transmitted by Desmodus rotundus. Phylogenetic analysis found no evidence to suggest L. ego is a reservoir for rabies antigenic variant 6. The most likely explanation for rabies in L. ega was infection following contact with a rabid L. cinereus.

  8. A three-dimensional spatial mapping approach to quantify fine-scale heterogeneity among leaves within canopies1

    PubMed Central

    Wingfield, Jenna L.; Ruane, Lauren G.; Patterson, Joshua D.

    2017-01-01

    Premise of the study: The three-dimensional structure of tree canopies creates environmental heterogeneity, which can differentially influence the chemistry, morphology, physiology, and/or phenology of leaves. Previous studies that subdivide canopy leaves into broad categories (i.e., “upper/lower”) fail to capture the differences in microenvironments experienced by leaves throughout the three-dimensional space of a canopy. Methods: We use a three-dimensional spatial mapping approach based on spherical polar coordinates to examine the fine-scale spatial distributions of photosynthetically active radiation (PAR) and the concentration of ultraviolet (UV)-absorbing compounds (A300) among leaves within the canopies of black mangroves (Avicennia germinans). Results: Linear regressions revealed that interior leaves received less PAR and produced fewer UV-absorbing compounds than leaves on the exterior of the canopy. By allocating more UV-absorbing compounds to the leaves on the exterior of the canopy, black mangroves may be maximizing UV-protection while minimizing biosynthesis of UV-absorbing compounds. Discussion: Three-dimensional spatial mapping provides an inexpensive and portable method to detect fine-scale differences in environmental and biological traits within canopies. We used it to understand the relationship between PAR and A300, but the same approach can also be used to identify traits associated with the spatial distribution of herbivores, pollinators, and pathogens. PMID:29188145

  9. NMR imaging of high-amylose starch tablets. 1. Swelling and water uptake.

    PubMed

    Baille, Wilms E; Malveau, Cédric; Zhu, Xiao Xia; Marchessault, Robert H

    2002-01-01

    Pharmaceutical tablets made of modified high-amylose starch have a hydrophilic polymer matrix into which water can penetrate with time to form a hydrogel. Nuclear magnetic resonance imaging was used to study the water penetration and the swelling of the matrix of these tablets. The tablets immersed in water were imaged at different time intervals on a 300 MHz NMR spectrometer. Radial images show clearly the swelling of the tablets and the water concentration profile. The rate constants for water diffusion and the tablet swelling were extracted from the experimental data. The water diffusion process was found to follow case II kinetics at 25 degrees C. NMR imaging also provided spin density profiles of the water penetrating inside the tablets.

  10. CF6 jet engine performance improvement: New fan

    NASA Technical Reports Server (NTRS)

    Fasching, W. A.

    1980-01-01

    As part of the NASA sponsored engine component improvement program, and fan package was developed to reduce fuel consumption in current CF6 turbofan aircraft engine. The new fan package consist of an improved fan blade, reduced fan tip clearance due to a fan case stiffener, and a smooth fan casing tip shroud. CF6 engine performance and acoustic tests demonstrated the predicted 1.8% improvement in cruise sfc without an increase in engine noise. Power management thrust/fan speed characteristics were defined. Mechanical and structural integrity was demonstrated in model fan rotor photoelastic stress tests, full-size fan blade bench fatigue tests, and CF6 engine bird ingestion, crosswind, and cyclic endurance tests. The fan was certified in the CF6-500c2/E2 engines and is in commerical service on the Boeing 747-200, Douglas DC-10-30, and Atrbus industrie A300B aircraft.

  11. High Temperature Solar Reflector, Its Preparation and Use

    NASA Technical Reports Server (NTRS)

    Jaworske, Donald A. (Inventor)

    1999-01-01

    A coating-substrate combination having high specular reflectivity at high temperatures reaching 8000 C in a vacuum is described. The substrate comprises pure nickel metal or a nickel-containing metal alloy such as stainless steel having a highly polished reflective surface. The coating is a layer of silver deposited on the substrate to a thickness of 300 A to 3000 A. A 300 A to 5000 A protective coating of silica, alumina or magnesium fluoride is used to cover the silver and to protect it from oxidation. The combination is useful as a parabolic shaped secondary concentrator for collecting solar radiation for generating power or thermal energy for satellite uses. The reflective layer and protective coating preferably are applied to the reflective surface of the substrate by electron beam evaporation or by ion sputtering.

  12. The role of fiber and matrix in crash energy absorption of composite materials

    NASA Technical Reports Server (NTRS)

    Farley, G. L.; Bird, R. K.; Modlin, J. T.

    1986-01-01

    Static crushing tests were conducted on tube specimens fabricated from graphite/epoxy, Kevlar/epoxy and hybrid combinations of graphite-Kevlar/epoxy to examine the influence the fiber and matrix constitutive properties and laminate architecture have on energy absorption. Fiber and matrix ultimate failure strain were determined to significantly effect energy absorption. The energy absorption capability of high ultimate failure strain materials (AS-6/F185 and AS-6/HST-7) was less than materials having lower ultimate failure strain. Lamina stacking sequence had up to a 300 percent change in energy absorption for the materials tested. Hybridizing with graphite and Kevlar reinforcements resulted in materials with high energy absorption capabilities that have postcrushing integrity.

  13. Seeing Stars

    NASA Astrophysics Data System (ADS)

    Kitchin, Chris; Forrest, Robert W.

    Seeing Stars is written for astronomers, regardless of the depth of their theoretical knowledge, who are taking their first steps in observational astronomy. Chris Kitchin and Bob Forrest - both professional astronomers - take a conducted tour of the night sky and suggest suitable observing programmes for everyone from beginners to experts. How is this book different? We are all familiar with the beautiful images of planets and galaxies obtained by spacecraft and giant telescopes - but what can you really see with a small telescope? What should you expect from a small refractor or reflector? And what is the effect of observing from a site near a city? The answers are all here, with many photographs that will illustrate exactly what can be seen with different instruments (everything from the naked eye to a 300mm telescope) - and from different locations.

  14. Wall structure and material properties cause viscous damping of swimbladder sounds in the oyster toadfish Opsanus tau

    PubMed Central

    King, Terrence L.; Ali, Heba; Sidker, Nehan; Cameron, Timothy M.

    2016-01-01

    Despite rapid damping, fish swimbladders have been modelled as underwater resonant bubbles. Recent data suggest that swimbladders of sound-producing fishes use a forced rather than a resonant response to produce sound. The reason for this discrepancy has not been formally addressed, and we demonstrate, for the first time, that the structure of the swimbladder wall will affect vibratory behaviour. Using the oyster toadfish Opsanus tau, we find regional differences in bladder thickness, directionality of collagen layers (anisotropic bladder wall structure), material properties that differ between circular and longitudinal directions (stress, strain and Young's modulus), high water content (80%) of the bladder wall and a 300-fold increase in the modulus of dried tissue. Therefore, the swimbladder wall is a viscoelastic structure that serves to damp vibrations and impart directionality, preventing the expression of resonance. PMID:27798293

  15. Dual band sensitivity enhancements of a VO(x) microbolometer array using a patterned gold black absorber.

    PubMed

    Smith, Evan M; Panjwani, Deep; Ginn, James; Warren, Andrew P; Long, Christopher; Figuieredo, Pedro; Smith, Christian; Nath, Janardan; Perlstein, Joshua; Walter, Nick; Hirschmugl, Carol; Peale, Robert E; Shelton, David

    2016-03-10

    Infrared-absorbing gold black has been selectively patterned onto the active surfaces of a vanadium-oxide-based infrared bolometer array. Patterning by metal lift-off relies on protection of the fragile gold black with an evaporated oxide, which preserves much of gold black's high absorptance. This patterned gold black also survives the dry-etch removal of the sacrificial polyimide used to fabricate the air-bridge bolometers. For our fabricated devices, infrared responsivity is improved 22% in the long-wave IR and 70% in the mid-wave IR by the gold black coating, with no significant change in detector noise, using a 300°C blackbody and 80 Hz chopping rate. The increase in the time constant caused by the additional mass of gold black is ∼15%.

  16. Graphene as a transparent electrode for amorphous silicon-based solar cells

    NASA Astrophysics Data System (ADS)

    Vaianella, F.; Rosolen, G.; Maes, B.

    2015-06-01

    The properties of graphene in terms of transparency and conductivity make it an ideal candidate to replace indium tin oxide (ITO) in a transparent conducting electrode. However, graphene is not always as good as ITO for some applications, due to a non-negligible absorption. For amorphous silicon photovoltaics, we have identified a useful case with a graphene-silica front electrode that improves upon ITO. For both electrode technologies, we simulate the weighted absorption in the active layer of planar amorphous silicon-based solar cells with a silver back-reflector. The graphene device shows a significantly increased absorbance compared to ITO-based cells for a large range of silicon thicknesses (34.4% versus 30.9% for a 300 nm thick silicon layer), and this result persists over a wide range of incidence angles.

  17. A Noise and Emissions Assessment of the N3-X Transport

    NASA Technical Reports Server (NTRS)

    Berton, Jeffrey J.; Haller, William J.

    2014-01-01

    Analytical predictions of certification noise and exhaust emissions for NASA's N3-X - a notional, hybrid wingbody airplane - are presented in this paper. The N3-X is a 300-passenger concept transport propelled by an array of fans distributed spanwise near the trailing edge of the wingbody. These fans are driven by electric motors deriving power from twin generators driven by turboshaft engines. Turboelectric distributed hybrid propulsion has the potential to dramatically increase the propulsive efficiency of aircraft. The noise and exhaust emission estimates presented here are generated using NASA's conceptual design systems analysis tools with several key modifications to accommodate this unconventional architecture. These tools predict certification noise and the emissions of oxides of nitrogen by leveraging data generated from a recent analysis of the N3-X propulsion system.

  18. Spaceborne CO2 laser communications systems

    NASA Technical Reports Server (NTRS)

    Mcelroy, J. H.; Mcavoy, N.; Johnson, E. H.; Goodwin, F. E.; Peyton, B. J.

    1975-01-01

    Projections of the growth of earth-sensing systems for the latter half of the 1980's show a data transmission requirement of 300 Mbps and above. Mission constraints and objectives lead to the conclusion that the most efficient technique to return the data from the sensing satellite to a ground station is through a geosynchronous data relay satellite. Of the two links that are involved (sensing satellite to relay satellite and relay satellite to ground), a laser system is most attractive for the space-to-space link. The development of CO2 laser systems for space-to-space applications is discussed with the completion of a 300 Mpbs data relay receiver and its modification into a transceiver. The technology and state-of-the-art of such systems are described in detail.

  19. AlN-based piezoelectric micromachined ultrasonic transducer for photoacoustic imaging

    NASA Astrophysics Data System (ADS)

    Chen, Bingzhang; Chu, Futong; Liu, Xingzhao; Li, Yanrong; Rong, Jian; Jiang, Huabei

    2013-07-01

    We report on the fabrication of a piezoelectric micromachined ultrasonic transducer (pMUT) and its application to photoacoustic imaging. With c-axis orientation, AlN was grown on a 300 nm-thick SiO2 film and a 200 nm-thick bottom electrode at room temperature. The device consists of SiO2, bottom electrode, AlN films, upper electrode, and polyimide protective layer. An area ratio of 0.45 was used between the upper electrode and the vibration area of the pMUT to provide an optimal sensitivity of transducer. Its resonant frequency was measured to be 2.885 MHz, and the coupling coefficient in the range of 2.38%-3.71%. The fabricated pMUT was integrated with a photoacoustic imaging system and photoacoustic image of a phantom was obtained. The resolution of the system was measured to be about 240 μm.

  20. Aerobic treatment of swine manure to enhance anaerobic digestion and microalgal cultivation.

    PubMed

    Bekoe, Dominic; Wang, Lijun; Zhang, Bo; Scott Todd, Matthew; Shahbazi, Abolghasem

    2018-02-01

    Aerobic treatment of swine manure was coupled with anaerobic digestion and microalgal cultivation. A 14-day aerobic treatment reduced the total solid content of swine manure by >15%. Ammonia and carbon dioxide were stripped by the air supplied, and this off-gas was further used to aerate the culture of Chlorella vulgaris. The microalgal growth rates in Bristol medium and the wastewater with the off-gas increased from 0.08 to 0.22 g/L/d and from 0.15 to 0.24 g/L/d, respectively. Meanwhile, the aerobically treated swine manure showed a higher methane yield during anaerobic digestion. The experimental results were used to establish a demonstration unit consisting of a 100 L composter, a 200 L anaerobic digester, a 60 L tubular photobioreactor, and a 300 L micro-open raceway pond.

  1. Intracranial pressure increases during weightlessness: A parabolic flights study

    NASA Astrophysics Data System (ADS)

    Denise, P.; Normand, H.; Buzer, L.; Duretete, A.; Avan, P.

    2005-08-01

    The fluid shift induced by weightlessness likely induces an elevated intracranial pressure (ICP). This factor may contribute to space adaptation syndrome (SAS). Recently, it has been shown that ICP can be monitored every few seconds non invasively by otoacoustic emissions (OAE). The OAE of 6 subjects were measured along the course of parabolic flights aboard the zero-gravity A300 Airbus. Built-in noise rejection and signal processing techniques enabled valid OAE signals to be collected and analyzed online in 4 of 6 subjects. On average, the phase of 1 kHz- OAE rotated by -41° from 1 to 1.8 g, and by +78.7° at 0 g relative to 1 g. From reference invasive ICP measurements in a control group of neurosurgery patients, it is possible to infer that ICP increased by about 34 mmHg in transient weightlessness.

  2. Modulation and coding for satellite and space communications

    NASA Technical Reports Server (NTRS)

    Yuen, Joseph H.; Simon, Marvin K.; Pollara, Fabrizio; Divsalar, Dariush; Miller, Warner H.; Morakis, James C.; Ryan, Carl R.

    1990-01-01

    Several modulation and coding advances supported by NASA are summarized. To support long-constraint-length convolutional code, a VLSI maximum-likelihood decoder, utilizing parallel processing techniques, which is being developed to decode convolutional codes of constraint length 15 and a code rate as low as 1/6 is discussed. A VLSI high-speed 8-b Reed-Solomon decoder which is being developed for advanced tracking and data relay satellite (ATDRS) applications is discussed. A 300-Mb/s modem with continuous phase modulation (CPM) and codings which is being developed for ATDRS is discussed. Trellis-coded modulation (TCM) techniques are discussed for satellite-based mobile communication applications.

  3. A high yield neutron target for cancer therapy

    NASA Technical Reports Server (NTRS)

    Alger, D. L.; Steinberg, R.

    1972-01-01

    A rotating target was developed that has the potential for providing an initial yield of 10 to the 13th power neutrons per second by the T(d,n)He-4 reaction, and a useable lifetime in excess of 600 hours. This yield and lifetime are indicated for a 300 Kv and 30 mA deuteron accelerator and a 30 microns thick titanium tritide film formed of the stoichiometric compound TiT2. The potential for extended lifetime is made possible by incorporating a sputtering electrode that permits use of titanium tritide thicknesses much greater than the deuteron range. The electrode is used to remove in situ depleted titanium layers to expose fresh tritide beneath. The utilization of the rotating target as a source of fast neutrons for cancer therapy is discussed.

  4. The 300 mA SRF ERL

    SciTech Connect

    Ben-Zvi, Ilan

    Energy Recovery Linacs (ERL) are important for a variety of applications, from high-power Free-Electron Lasers (FEL) to polarized-electron polarized-proton colliders. The ERL current is arguably the most important characteristic of ERLs for such applications. With that in mind, the Collider-Accelerator Department at Brookhaven National Laboratory embarked on the development of a 300 mA ERL to serve as an R and D test-bed for high-current ERL technologies. These include high-current, extremely well damped superconducting accelerating cavities, high-current superconducting laser-photocathode electron guns and high quantum-efficiency photocathodes. In this presentation I will cover these ERL related developments.

  5. Target assembly

    DOEpatents

    Lewis, Richard A.

    1980-01-01

    A target for a proton beam which is capable of generating neutrons for absorption in a breeding blanket includes a plurality of solid pins formed of a neutron emissive target material disposed parallel to the path of the beam and which are arranged axially in a plurality of layers so that pins in each layer are offset with respect to pins in all other layers, enough layers being used so that each proton in the beam will strike at least one pin with means being provided to cool the pins. For a 300 mA, 1 GeV beam (300 MW), stainless steel pins, 12 inches long and 0.23 inches in diameter are arranged in triangular array in six layers with one sixth of the pins in each layer, the number of pins being such that the entire cross sectional area of the beam is covered by the pins with minimum overlap of pins.

  6. Cross-sectional TEM specimen preparation for W/B{sub 4}C multilayer sample using FIB

    SciTech Connect

    Mondal, Puspen, E-mail: puspen@rrcat.gov.in; Pradhan, P. C.; Tiwari, Pragya

    2016-05-23

    A recent emergence of a cross-beam scanning electron microscopy (SEM)/focused-ion-beam (FIB) system have given choice to fabricate cross-sectional transmission electron microscopy (TEM) specimen of thin film multilayer sample. A 300 layer pair thin film multilayer sample of W/B{sub 4}C was used to demonstrate the specimen lift-out technique in very short time as compared to conventional cross-sectional sample preparation technique. To get large area electron transparent sample, sample prepared by FIB is followed by Ar{sup +} ion polishing at 2 kV with grazing incident. The prepared cross-sectional sample was characterized by transmission electron microscope.

  7. Twin-induced phase transition from β-Ga2O3 to α-Ga2O3 in Ga2O3 thin films

    NASA Astrophysics Data System (ADS)

    Choi, Byeongdae; Allabergenov, Bunyod; Lyu, Hong-Kun; Lee, Seong Eui

    2018-06-01

    We deposited a 300-nm-thick Ga2O3 thin film on an amorphous SiO2/Si substrate via pulsed laser deposition. X-ray diffraction patterns revealed the formation of β-Ga2O3 phase at a substrate temperature of 700 °C. X-ray photoelectron spectra indicated that the degree of oxidation increased after annealing at 700 °C. Further annealings at higher temperatures led to a transition of the β-Ga2O3 phase to the α-Ga2O3 phase; this transition was caused by the twin structure formed during the crystallinity improvement process. In addition, we discuss the mechanism of the transition from the β phase to the α phase in the β-Ga2O3 thin films.

  8. MicroSPE-nanoLC-ESI-MS/MS Using 10-μm-i.d. Silica-Based Monolithic Columns for Proteomics

    SciTech Connect

    Luo, Quanzhou; Page, Jason S.; Tang, Keqi

    2007-01-01

    Silica-based monolithic narrow bore capillary columns (25 cm x 10 µm i.d.) with an integrated nanoESI emitter has been developed to provide high quality and robust microSPE-nanoLC-ESI-MS analyses. The integrated nanoESI emitter adds no dead volume to the LC separation, allowing stable electrospray performance to be obtained at flow rates of ~10 nL/min. In an initial application we identified 5510 unique peptides covering 1443 distinct Shewanella oneidensis proteins from a 300 ng tryptic digest sample in a single 4-h LC-MS/MS analysis using a linear ion trap MS (LTQ). We found the use of an integrated monolithic ESI emitter provided enhancedmore » resistance to clogging and good run-to-run reproducibility.« less

  9. RC64, a Rad-Hard Many-Core High- Performance DSP for Space Applications

    NASA Astrophysics Data System (ADS)

    Ginosar, Ran; Aviely, Peleg; Gellis, Hagay; Liran, Tuvia; Israeli, Tsvika; Nesher, Roy; Lange, Fredy; Dobkin, Reuven; Meirov, Henri; Reznik, Dror

    2015-09-01

    RC64, a novel rad-hard 64-core signal processing chip targets DSP performance of 75 GMACs (16bit), 150 GOPS and 38 single precision GFLOPS while dissipating less than 10 Watts. RC64 integrates advanced DSP cores with a multi-bank shared memory and a hardware scheduler, also supporting DDR2/3 memory and twelve 3.125 Gbps full duplex high speed serial links using SpaceFibre and other protocols. The programming model employs sequential fine-grain tasks and a separate task map to define task dependencies. RC64 is implemented as a 300 MHz integrated circuit on a 65nm CMOS technology, assembled in hermetically sealed ceramic CCGA624 package and qualified to the highest space standards.

  10. RC64, a Rad-Hard Many-Core High-Performance DSP for Space Applications

    NASA Astrophysics Data System (ADS)

    Ginosar, Ran; Aviely, Peleg; Liran, Tuvia; Alon, Dov; Mandler, Alberto; Lange, Fredy; Dobkin, Reuven; Goldberg, Miki

    2014-08-01

    RC64, a novel rad-hard 64-core signal processing chip targets DSP performance of 75 GMACs (16bit), 150 GOPS and 20 single precision GFLOPS while dissipating less than 10 Watts. RC64 integrates advanced DSP cores with a multi-bank shared memory and a hardware scheduler, also supporting DDR2/3 memory and twelve 2.5 Gbps full duplex high speed serial links using SpaceFibre and other protocols. The programming model employs sequential fine-grain tasks and a separate task map to define task dependencies. RC64 is implemented as a 300 MHz integrated circuit on a 65nm CMOS technology, assembled in hermetically sealed ceramic CCGA624 package and qualified to the highest space standards.

  11. Method to study the effect of blend flowability on the homogeneity of acetaminophen.

    PubMed

    Llusá, Marcos; Pingali, Kalyana; Muzzio, Fernando J

    2013-02-01

    Excipient selection is key to product development because it affects their processability and physical properties, which ultimately affect the quality attributes of the pharmaceutical product. To study how the flowability of lubricated formulations affects acetaminophen (APAP) homogeneity. The formulations studied here contain one of two types of cellulose (Avicel 102 or Ceollus KG-802), one of three grades of Mallinckrodt APAP (fine, semi-fine, or micronized), lactose (Fast-Flo) and magnesium stearate. These components are mixed in a 300-liter bin blender. Blend flowability is assessed with the Gravitational Displacement Rheometer. APAP homogeneity is assessed with off-line NIR. Excluding blends dominated by segregation, there is a trend between APAP homogeneity and blend flow index. Blend flowability is affected by the type of microcrystalline cellulose and by the APAP grade. The preliminary results suggest that the methodology used in this paper is adequate to study of the effect of blend flow index on APAP homogeneity.

  12. Indomethacin increases the formation of lipoxygenase products in calcium ionophore stimulated human neutrophils.

    PubMed

    Docherty, J C; Wilson, T W

    1987-10-29

    Arachidonic acid metabolism in human neutrophils stimulated in vitro with the calcium ionophore A23187 was studied using combined HPLC and radioimmunoassays. Indomethacin (0.1 and 1.0 microM) caused a 300% increase in LTB4 formation in neutrophils stimulated with A23187. 5-, 12- and 15-HETE levels were also increased. In the presence of exogenous arachidonic acid 1.0 microM Indomethacin caused a 37% increase in LTB4 formation. Acetyl Salicylic Acid and Ibuprofen had no effect on the formation of lipoxygenase metabolites. The effect of indomethacin on LTB4 formation does not appear to be due to a simple redirection of substrate arachidonic acid from the cyclooxygenase to the lipoxygenase pathways.

  13. High Input Voltage Discharge Supply for High Power Hall Thrusters Using Silicon Carbide Devices

    NASA Technical Reports Server (NTRS)

    Pinero, Luis R.; Scheidegger, Robert J.; Aulsio, Michael V.; Birchenough, Arthur G.

    2014-01-01

    A power processing unit for a 15 kW Hall thruster is under development at NASA Glenn Research Center. The unit produces up to 400 VDC with two parallel 7.5 kW discharge modules that operate from a 300 VDC nominal input voltage. Silicon carbide MOSFETs and diodes were used in this design because they were the best choice to handle the high voltage stress while delivering high efficiency and low specific mass. Efficiencies in excess of 97 percent were demonstrated during integration testing with the NASA-300M 20 kW Hall thruster. Electromagnet, cathode keeper, and heater supplies were also developed and will be integrated with the discharge supply into a vacuum-rated brassboard power processing unit with full flight functionality. This design could be evolved into a flight unit for future missions that requires high power electric propulsion.

  14. Positions of minor planets and Comet Panther (1980 u) obtained at the Chorzow Observatory

    NASA Astrophysics Data System (ADS)

    Wlodarczyk, I.

    Photographic observations of 17 asteroids and Comet Panther were made between 1977 and 1982 with a 200/1000 mm photographic camera coupled to a 300/4500 mm refractor. The Turner method with the complete second-order polynomial was used to reduce the 16 x 16 cm ORWO ZU-2 plates that were obtained. The tabulated information for each asteroid and the comet include the number of the observation, the time of the observation in Universal Time, the topocentric position of the object referred to the mean epoch 1950.0, the dispersion in right ascension and declination, the duration of the exposure in minutes, and the symbol of the observer. Ten observers participated in the program.

  15. Toward athermal silicon-on-insulator (de)multiplexers in the O-band.

    PubMed

    Hassan, Karim; Sciancalepore, Corrado; Harduin, Julie; Ferrotti, Thomas; Menezo, Sylvie; Ben Bakir, Badhise

    2015-06-01

    We report on the design, fabrication, and characterization of a 1×4 silicon-on-insulator (SOI) demultiplexer exhibiting a significant reduction of its thermo-optical sensitivity in the O-band. The optical filtering is achieved by cascading several Mach-Zehnder interferometers (MZIs) fabricated on a 300-nm-thick SOI platform. Owing to an asymmetric design of the confinement for each MZIs, we found an athermal criterium that satisfies the spectral requirements. The thermal sensitivity of the structure is analyzed by a semi-analytical model in order to create an athermal multiplexer. Fiber-to-fiber thermo-optical testing reveals a thermal sensitivity of around 17  pm/°C reduced by 75% compared to the standard devices with promising performances for both the crosstalk (15 dB), the insertion losses (4 dB), and absolute lambda registration (<0.25  nm).

  16. A Molecular Dynamics Simulation of the Turbulent Couette Minimal Flow Unit

    NASA Astrophysics Data System (ADS)

    Smith, Edward

    2016-11-01

    What happens to turbulent motions below the Kolmogorov length scale? In order to explore this question, a 300 million molecule Molecular Dynamics (MD) simulation is presented for the minimal Couette channel in which turbulence can be sustained. The regeneration cycle and turbulent statistics show excellent agreement to continuum based computational fluid dynamics (CFD) at Re=400. As MD requires only Newton's laws and a form of inter-molecular potential, it captures a much greater range of phenomena without requiring the assumptions of Newton's law of viscosity, thermodynamic equilibrium, fluid isotropy or the limitation of grid resolution. The fundamental nature of MD means it is uniquely placed to explore the nature of turbulent transport. A number of unique insights from MD are presented, including energy budgets, sub-grid turbulent energy spectra, probability density functions, Lagrangian statistics and fluid wall interactions. EPSRC Post Doctoral Prize Fellowship.

  17. Large scale topography of Io

    NASA Technical Reports Server (NTRS)

    Gaskell, R. W.; Synnott, S. P.

    1987-01-01

    To investigate the large scale topography of the Jovian satellite Io, both limb observations and stereographic techniques applied to landmarks are used. The raw data for this study consists of Voyager 1 images of Io, 800x800 arrays of picture elements each of which can take on 256 possible brightness values. In analyzing this data it was necessary to identify and locate landmarks and limb points on the raw images, remove the image distortions caused by the camera electronics and translate the corrected locations into positions relative to a reference geoid. Minimizing the uncertainty in the corrected locations is crucial to the success of this project. In the highest resolution frames, an error of a tenth of a pixel in image space location can lead to a 300 m error in true location. In the lowest resolution frames, the same error can lead to an uncertainty of several km.

  18. Construction and measurements of an improved vacuum-swing-adsorption radon-mitigation system

    SciTech Connect

    Street, J., E-mail: joseph.street@mines.sdsmt.edu; Bunker, R.; Dunagan, C.

    In order to reduce backgrounds from radon-daughter plate-out onto detector surfaces, an ultra-low-radon cleanroom is being commissioned at the South Dakota School of Mines and Technology. An improved vacuum-swing-adsorption radon mitigation system and cleanroom build upon a previous design implemented at Syracuse University that achieved radon levels of ∼0.2 Bq m{sup −3}. This improved system will employ a better pump and larger carbon beds feeding a redesigned cleanroom with an internal HVAC unit and aged water for humidification. With the rebuilt (original) radon mitigation system, the new low-radon cleanroom has already achieved a > 300× reduction from an input activitymore » of 58.6 ± 0.7 Bq m{sup −3} to a cleanroom activity of 0.13 ± 0.06 Bq m{sup −3}.« less

  19. Construction and measurements of an improved vacuum-swing-adsorption radon-mitigation system

    NASA Astrophysics Data System (ADS)

    Street, J.; Bunker, R.; Dunagan, C.; Loose, X.; Schnee, R. W.; Stark, M.; Sundarnath, K.; Tronstad, D.

    2015-08-01

    In order to reduce backgrounds from radon-daughter plate-out onto detector surfaces, an ultra-low-radon cleanroom is being commissioned at the South Dakota School of Mines and Technology. An improved vacuum-swing-adsorption radon mitigation system and cleanroom build upon a previous design implemented at Syracuse University that achieved radon levels of ˜0.2 Bq m-3. This improved system will employ a better pump and larger carbon beds feeding a redesigned cleanroom with an internal HVAC unit and aged water for humidification. With the rebuilt (original) radon mitigation system, the new low-radon cleanroom has already achieved a > 300× reduction from an input activity of 58.6 ± 0.7 Bq m-3 to a cleanroom activity of 0.13 ± 0.06 Bq m-3.

  20. Radon Mitigation for the SuperCDMS-SNOLAB Dark Matter Experiment

    NASA Astrophysics Data System (ADS)

    Street, Joseph; SuperCDMS Collaboration

    2016-03-01

    Experiments that seek to detect very rare processes, such as interactions of the dark matter particles thought to make up 85% of the mass of the universe, may suffer background interactions from radon daughters that have plated out onto detector surfaces. To reduce these backgrounds, an ultra-low-radon cleanroom was built at the South Dakota School of Mines & Technology. Cleanroom air is supplied by an optimized vacuum-swing-adsorption radon mitigation system that has achieved a > 300 × reduction from an input activity of 58.6 +/- 0.7 Bq/m3 to a cleanroom activity of 0.13 +/- 0.06 Bq/m3. Expected backgrounds due to radon daughters for the SuperCDMS dark matter search will be presented.

  1. Experiment of low resistance joints for the ITER correction coil.

    PubMed

    Liu, Huajun; Wu, Yu; Wu, Weiyue; Liu, Bo; Shi, Yi; Guo, Shuai

    2013-01-01

    A test method was designed and performed to measure joint resistance of the ITER correction coil (CC) in liquid helium (LHe) temperature. A 10 kA superconducting transformer was manufactured to provide the joints current. The transformer consisted of two concentric layer-wound superconducting solenoids. NbTi superconducting wire was wound in the primary coil and the ITER CC conductor was wound in the secondary coil. The primary and the secondary coils were both immersed in liquid helium of a 300 mm useful bore diameter cryostat. Two ITER CC joints were assembled in the secondary loop and tested. The current of the secondary loop was ramped to 9 kA in several steps. The two joint resistances were measured to be 1.2 nΩ and 1.65 nΩ, respectively.

  2. The application of ERTS-1 data to the land use planning process. [Wisconsin

    NASA Technical Reports Server (NTRS)

    Clapp, J. L.; Kiefer, R. W.; Kuhlmey, E. L.; Niemann, B. J., Jr.

    1974-01-01

    Land resource data has been extracted on a percent of cell basis from ERTS imagery, RB-57 color infrared imagery and best available conventional sources for a 10,000 square kilometer test area in eastern Wisconsin. First, the data from the three sources is compared on a spatial basis for a 300 square kilometer portion of the test area. For those land resource variables associated with cover, ERTS derived resource data compared favorably with both the RB-57 and conventional data. Second, the effect of the data source on land use decisions is examined. Three interstate highway corridors are located through the same region based upon data extracted from each of the three sources. A policy of preserving natural environmental systems was used as a basis for the corridors selection in each case. The resulting three corridors compare favorably.

  3. Leveraging data to systematically improve care: coronary artery disease management at Geisinger.

    PubMed

    Graf, Thomas; Erskine, Alistair; Steele, Glenn D

    2014-01-01

    Coronary artery disease is complex chronic disease best managed by a team empowered by actionable data and a comprehensive approach, the ability to improve intermediate outcomes was dramatically enhanced after Geisinger created a system of care to do so. Continuous measurement of critical data elements of process and intermediate outcome measures allows the delivery of actionable information to the most appropriate team member, including the patients and family as team members. Continuous monitoring of the overall program looking for trends and opportunities across sites and regions allows for program enhancements. The comprehensive "all-or-none" bundled approach to care, which has already realized a 300% improvement, will be further enhanced by incorporating additional "Big Data" flows.

  4. Using the Medipix3 detector for direct electron imaging in the range 60 keV to 200 keV in electron microscopy

    NASA Astrophysics Data System (ADS)

    Mir, J. A.; Plackett, R.; Shipsey, I.; dos Santos, J. M. F.

    2017-11-01

    Hybrid pixel sensor technology such as the Medipix3 represents a unique tool for electron imaging. We have investigated its performance as a direct imaging detector using a Transmission Electron Microscope (TEM) which incorporated a Medipix3 detector with a 300 μm thick silicon layer compromising of 256×256 pixels at 55 μm pixel pitch. We present results taken with the Medipix3 in Single Pixel Mode (SPM) with electron beam energies in the range, 60-200 keV . Measurements of the Modulation Transfer Function (MTF) and the Detective Quantum Efficiency (DQE) were investigated. At a given beam energy, the MTF data was acquired by deploying the established knife edge technique. Similarly, the experimental data required to determine DQE was obtained by acquiring a stack of images of a focused beam and of free space (flatfield) to determine the Noise Power Spectrum (NPS).

  5. A small size 1-3 atm pulsed CO2 laser with series-connected spark gaps ultraviolet preionization.

    PubMed

    Silakhori, K; Jelvani, S; Ghanavati, F; Sajad, B; Talebi, M; Sadr, M R

    2014-01-01

    A small size pulsed CO2 laser with rounded edge flat profiled electrodes and variable gas pressure in 1-3 atm range has been constructed and characterized. The perionization system consists of a pair of 16 series-connected spark gaps located along either side of the main electrodes by which, the number of required preionization capacitors is reduced to 4. Sharpening of the main discharge has been performed using a 300 pF peaking capacitor. A maximum energy of 160 mJ/pulse was obtained for CO2:N2:He≡1:1:8 gas mixture and 33 kV discharge voltage. By increasing the laser gas pressure in 1-3 atm range, the duration of spike and tail parts of the laser pulses have been reduced from 110 ns and 4 μs to 37 ns and 1 μs, respectively.

  6. Tritium in water vapor in the shallow unsaturated zone at the Amargosa Desert Research Site

    USGS Publications Warehouse

    Healy, Richard W.; Striegl, Robert G.; Michel, Robert L.; Prudic, David E.; Andraski, Brian J.; Morganwalp, David W.; Buxton, Herbert T.

    1999-01-01

    Samples of water vapor in soil gas were obtained at the U.S. Geological Survey's Amargosa Desert Research Site in 1997 and 1998 from a depth of 1.5 m (meters) within a 300 m by 300 m grid that lies immediately to the south and west of a low-level radioactive-waste disposal site. The gas samples were analyzed for tritium. Fifty-eight samples were collected in May 1997; 61 samples were collected in June 1998. Measured tritium concentrations ranged from 16 ± 9 TU (tritium units) to 36,900 ± 300 TU in 1997, and from 6 ± 6 TU to 37,360 ± 450 TU in 1998. Concentrations decreased from northeast to southwest across the grid. In general, there was very little difference in tritium concentrations between the two sampling periods.

  7. Vertical profiles of the 3-D wind velocity retrieved from multiple wind lidars performing triple range-height-indicator scans

    DOE PAGES

    Debnath, Mithu; Iungo, G. Valerio; Ashton, Ryan; ...

    2017-02-06

    Vertical profiles of 3-D wind velocity are retrieved from triple range-height-indicator (RHI) scans performed with multiple simultaneous scanning Doppler wind lidars. This test is part of the eXperimental Planetary boundary layer Instrumentation Assessment (XPIA) campaign carried out at the Boulder Atmospheric Observatory. The three wind velocity components are retrieved and then compared with the data acquired through various profiling wind lidars and high-frequency wind data obtained from sonic anemometers installed on a 300 m meteorological tower. The results show that the magnitude of the horizontal wind velocity and the wind direction obtained from the triple RHI scans are generally retrieved withmore » good accuracy. Furthermore, poor accuracy is obtained for the evaluation of the vertical velocity, which is mainly due to its typically smaller magnitude and to the error propagation connected with the data retrieval procedure and accuracy in the experimental setup.« less

  8. Cyclotron autoresonant accelerator for electron beam dry scrubbing of flue gases

    SciTech Connect

    LaPointe, M.A.; Hirshfield, J.L.; Hirshfield, J.L.

    1999-06-01

    Design and construction is underway for a novel rf electron accelerator for electron beam dry scrubbing (EBDS) of flue gases emanating from fossil-fuel burners. This machine, a cyclotron autoresonance accelerator (CARA), has already shown itself capable of converting rf power to electron beam power with efficiency values as high as 96{percent}. This proof-of-principle experiment will utilize a 300 kV, 33 A Pierce type electron gun and up to 24 MW of available rf power at 2.856 GHz to produce 1.0 MeV, 33 MW electron beam pulses. The self-scanning conical beam from the high power CARA will be evaluated for EBDSmore » and other possible environmental applications. {copyright} {ital 1999 American Institute of Physics.}« less

  9. Cyclotron autoresonant accelerator for electron beam dry scrubbing of flue gases

    SciTech Connect

    LaPointe, M. A.; Hirshfield, J. L.; Department of Physics, Yale University, P.O. Box 208124, New Haven, Connecticut 06520-8124

    1999-06-10

    Design and construction is underway for a novel rf electron accelerator for electron beam dry scrubbing (EBDS) of flue gases emanating from fossil-fuel burners. This machine, a cyclotron autoresonance accelerator (CARA), has already shown itself capable of converting rf power to electron beam power with efficiency values as high as 96%. This proof-of-principle experiment will utilize a 300 kV, 33 A Pierce type electron gun and up to 24 MW of available rf power at 2.856 GHz to produce 1.0 MeV, 33 MW electron beam pulses. The self-scanning conical beam from the high power CARA will be evaluated for EBDSmore » and other possible environmental applications.« less

  10. Ballistic Mercury orbiter mission via Venus and Mercury gravity assists

    NASA Astrophysics Data System (ADS)

    Yen, Chen-Wan Liu

    1989-09-01

    This paper shows that it is possible to deliver a payload of 600 to 2000 kg to a 300-km circular orbit at Mercury, using the presently available NASA STS and a single-stage bipropellant chemical rocket. This superior payload performance is attained by swingbys of Venus, plus more importantly, the use of the reverse Delta-V/EGA process. In contrast to the familiar Delta-V/EGA process used to boost the launch energy by returning to earth for a gravity assist, the reverse process reduces the Mercury approach energy each time a spacecraft makes a near-resonant return to Mercury for a gravity assist and reduces the orbit-capture Delta-V requirement. The mission sequences for such high-performance missions are described, and example mission opportunities for the years 1990 to 2010 are presented.

  11. Electromagnetic coupling to centimeter-scale mechanical membrane resonators via RF cylindrical cavities

    NASA Astrophysics Data System (ADS)

    Martinez, Luis A.; Castelli, Alessandro R.; Delmas, William; Sharping, Jay E.; Chiao, Raymond

    2016-11-01

    We present experimental and theoretical results for the excitation of a mechanical oscillator via radiation pressure with a room-temperature system employing a relatively low-(Q) centimeter-size mechanical oscillator coupled to a relatively low-Q standard three-dimensional radio-frequency (RF) cavity resonator. We describe the forces giving rise to optomechanical coupling using the Maxwell stress tensor and show that nanometer-scale displacements are possible and experimentally observable. The experimental system is composed of a 35 mm diameter silicon nitride membrane sputtered with a 300 nm gold conducting film and attached to the end of a RF copper cylindrical cavity. The RF cavity is operated in its {{TE}}011 mode and amplitude modulated on resonance with the fundamental drum modes of the membrane. Membrane motion is monitored using an unbalanced, non-zero optical path difference, optically filtered Michelson interferometer capable of measuring sub-nanometer displacements.

  12. High power high repetition rate VCSEL array side-pumped pulsed blue laser

    NASA Astrophysics Data System (ADS)

    van Leeuwen, Robert; Zhao, Pu; Chen, Tong; Xu, Bing; Watkins, Laurence; Seurin, Jean-Francois; Xu, Guoyang; Miglo, Alexander; Wang, Qing; Ghosh, Chuni

    2013-03-01

    High power, kW-class, 808 nm pump modules based on the vertical-cavity surface-emitting laser (VCSEL) technology were developed for side-pumping of solid-state lasers. Two 1.2 kW VCSEL pump modules were implemented in a dual side-pumped Q-switched Nd:YAG laser operating at 946 nm. The laser output was frequency doubled in a BBO crystal to produce pulsed blue light. With 125 μs pump pulses at a 300 Hz repetition rate 6.1 W QCW 946 nm laser power was produced. The laser power was limited by thermal lensing in the Nd:YAG rod.

  13. Probing the X-ray Emission from the Massive Star Cluster Westerlund 2

    NASA Astrophysics Data System (ADS)

    Lopez, Laura

    2017-09-01

    We propose a 300 ks Chandra ACIS-I observation of the massive star cluster Westerlund 2 (Wd2). This region is teeming with high-energy emission from a variety of sources: colliding wind binaries, OB and Wolf-Rayet stars, two young pulsars, and an unidentified source of very high-energy (VHE) gamma-rays. Our Chandra program is designed to achieve several goals: 1) to take a complete census of Wd2 X-ray point sources and monitor variability; 2) to probe the conditions of the colliding winds in the binary WR 20a; 3) to search for an X-ray counterpart of the VHE gamma-rays; 4) to identify diffuse X-ray emission; 5) to compare results to other massive star clusters observed by Chandra. Only Chandra has the spatial resolution and sensitivity necessary for our proposed analyses.

  14. The Ascent of Olympus - An Everest Anniversary Perspective

    NASA Astrophysics Data System (ADS)

    Cockell, C. S.

    Olympus Mons, at 21,183 m above the Mars gravitational equipotential, stands just under 2.5 times the height of Mount Everest. Symbolically, as the highest construct in the Solar System, it is the most important feature to be climbed. Despite its powerful symbolism, the mountain presents one of the most tedious long distance expeditions on Mars - a ~300 km journey up a near constant 5 degree slope. Only at the beginning and the end of the expedition do the scarp and caldera cliffs present impressive climbs. In almost all respects Olympus presents environmental challenges much worse than Everest, apart from the lack of fatal storms, perhaps the only environmental factor in which Olympus is an improvement. Similarly to Everest, Olympus presents scien- tific questions of immense interest. In this mini-review I compare Olympus and Everest as exploratory and scientific challenges.

  15. Images of the laser entrance hole from the static x-ray imager at NIF.

    PubMed

    Schneider, M B; Jones, O S; Meezan, N B; Milovich, J L; Town, R P; Alvarez, S S; Beeler, R G; Bradley, D K; Celeste, J R; Dixit, S N; Edwards, M J; Haugh, M J; Kalantar, D H; Kline, J L; Kyrala, G A; Landen, O L; MacGowan, B J; Michel, P; Moody, J D; Oberhelman, S K; Piston, K W; Pivovaroff, M J; Suter, L J; Teruya, A T; Thomas, C A; Vernon, S P; Warrick, A L; Widmann, K; Wood, R D; Young, B K

    2010-10-01

    The static x-ray imager at the National Ignition Facility is a pinhole camera using a CCD detector to obtain images of Hohlraum wall x-ray drive illumination patterns seen through the laser entrance hole (LEH). Carefully chosen filters, combined with the CCD response, allow recording images in the x-ray range of 3-5 keV with 60 μm spatial resolution. The routines used to obtain the apparent size of the backlit LEH and the location and intensity of beam spots are discussed and compared to predictions. A new soft x-ray channel centered at 870 eV (near the x-ray peak of a 300 eV temperature ignition Hohlraum) is discussed.

  16. The Conference on High Temperature Electronics

    NASA Astrophysics Data System (ADS)

    Hamilton, D. J.; McCormick, J. B.; Kerwin, W. J.; Narud, J. A.

    The status of and directions for high temperature electronics research and development were evaluated. Major objectives were to (1) identify common user needs; (2) put into perspective the directions for future work; and (3) address the problem of bringing to practical fruition the results of these efforts. More than half of the presentations dealt with materials and devices, rather than circuits and systems. Conference session titles and an example of a paper presented in each session are (1) User requirements: High temperature electronics applications in space explorations; (2) Devices: Passive components for high temperature operation; (3) Circuits and systems: Process characteristics and design methods for a 300 degree QUAD or AMP; and (4) Packaging: Presently available energy supply for high temperature environment.

  17. Event Reconstruction Techniques in NOvA

    NASA Astrophysics Data System (ADS)

    Baird, M.; Bian, J.; Messier, M.; Niner, E.; Rocco, D.; Sachdev, K.

    2015-12-01

    The NOvA experiment is a long-baseline neutrino oscillation experiment utilizing the NuMI beam generated at Fermilab. The experiment will measure the oscillations within a muon neutrino beam in a 300 ton Near Detector located underground at Fermilab and a functionally-identical 14 kiloton Far Detector placed 810 km away. The detectors are liquid scintillator tracking calorimeters with a fine-grained cellular structure that provides a wealth of information for separating the different particle track and shower topologies. Each detector has its own challenges with the Near Detector seeing multiple overlapping neutrino interactions in each event and the Far Detector having a large background of cosmic rays due to being located on the surface. A series of pattern recognition techniques have been developed to go from event records, to spatially and temporally separating individual interactions, to vertexing and tracking, and particle identification. This combination of methods to achieve the full event reconstruction will be discussed.

  18. Nano-lithographically fabricated titanium dioxide based visible frequency three dimensional gap photonic crystal.

    PubMed

    Subramania, Ganapathi; Lee, Yun-Ju; Brener, Igal; Luk, Ting-Shan; Clem, Paul G

    2007-10-01

    Photonic crystals (PC) have emerged as important types of structures for light manipulation. Ultimate control of light is possible by creating PCs with a complete three dimensional (3D) gap [1, 2]. This has proven to be a considerable challenge in the visible and ultraviolet frequencies mainly due to complications in integrating transparent, high refractive index (n) materials with fabrication techniques to create ~ 100nm features with long range translational order. In this letter, we demonstrate a nano-lithography approach based on a multilevel electron beam direct write and physical vapor deposition, to fabricate four-layer titania woodpile PCs that potentially exhibit complete 3D gap at visible wavelengths. We achieved a short wavelength bandedge of 525nm with a 300nm lattice constant PC. Due to the nanoscale precision and capability for defect control, the nanolithography approach represents an important step toward novel visible photonic devices for lighting, lasers, sensing and biophotonics.

  19. Environmental technology demonstrations involving explosives contamination at the Volunteer Site

    SciTech Connect

    Walker, A.J.; Broder, M.F.; Jayne, E.A.

    1997-08-01

    Managed by the US Army Environmental Center, the Army`s test site at Volunteer Army Ammunition Plant encompasses a 300-acre area formerly used for batch production of TNT. Soil and groundwater contamination in the test area is well characterized. A network of monitoring wells and detailed information regarding the volume, location, and concentration of soil contamination is available to potential demonstrators. On-site field and laboratory support is provided by ICI Americas Incorporated, the facility`s operator. Four demonstrations have been conducted at the test site and several are scheduled for 1997. Preliminary findings from the four demonstrations discussed will be available sometimemore » in 1997.« less

  20. Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements

    PubMed Central

    Pérez-Prieto, Sandra; López-Cardona, Juan D.; Blanco, Enrique; Moreno-López, Jorge

    2018-01-01

    We report the experimental results on a new infrared fiber-optic pyrometer for very localized and high-speed temperature measurements ranging from 170 to 530 °C using low-noise photodetectors and high-gain transimpedance amplifiers with a single gain mode in the whole temperature range. We also report a shutter based on an optical fiber switch which is optically powered to provide a reference signal in an optical fiber pyrometer measuring from 200 to 550 °C. The tests show the potential of remotely powering via optical means a 300 mW power-hungry optical switch at a distance of 100 m, avoiding any electromagnetic interference close to the measuring point. PMID:29415477

  1. Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements.

    PubMed

    Vázquez, Carmen; Pérez-Prieto, Sandra; López-Cardona, Juan D; Tapetado, Alberto; Blanco, Enrique; Moreno-López, Jorge; Montero, David S; Lallana, Pedro C

    2018-02-06

    We report the experimental results on a new infrared fiber-optic pyrometer for very localized and high-speed temperature measurements ranging from 170 to 530 °C using low-noise photodetectors and high-gain transimpedance amplifiers with a single gain mode in the whole temperature range. We also report a shutter based on an optical fiber switch which is optically powered to provide a reference signal in an optical fiber pyrometer measuring from 200 to 550 °C. The tests show the potential of remotely powering via optical means a 300 mW power-hungry optical switch at a distance of 100 m, avoiding any electromagnetic interference close to the measuring point.

  2. Storms and Moons

    NASA Technical Reports Server (NTRS)

    2007-01-01

    The New Horizons Long Range Reconnaissance Imager (LORRI) took this 2-millisecond exposure of Jupiter at 04:41:04 UTC on January 24, 2007. The spacecraft was 57 million kilometers (35.3 million miles) from Jupiter, closing in on the giant planet at 41,500 miles (66,790 kilometers) per hour. At right are the moons Io (bottom) and Ganymede; Ganymede's shadow creeps toward the top of Jupiter's northern hemisphere.

    Two of Jupiter's largest storms are visible; the Great Red Spot on the western (left) limb of the planet, trailing the Little Red Spot on the eastern limb, at slightly lower latitude. The Great Red Spot is a 300-year old storm more than twice the size of Earth. The Little Red Spot, which formed over the past decade from the merging of three smaller storms, is about half the size of its older and 'greater' counterpart.

  3. Genomic analysis reveals hidden biodiversity within colugos, the sister group to primates

    PubMed Central

    Mason, Victor C.; Li, Gang; Minx, Patrick; Schmitz, Jürgen; Churakov, Gennady; Doronina, Liliya; Melin, Amanda D.; Dominy, Nathaniel J.; Lim, Norman T-L.; Springer, Mark S.; Wilson, Richard K.; Warren, Wesley C.; Helgen, Kristofer M.; Murphy, William J.

    2016-01-01

    Colugos are among the most poorly studied mammals despite their centrality to resolving supraordinal primate relationships. Two described species of these gliding mammals are the sole living members of the order Dermoptera, distributed throughout Southeast Asia. We generated a draft genome sequence for a Sunda colugo and a Philippine colugo reference alignment, and used these to identify colugo-specific genetic changes that were enriched in sensory and musculoskeletal-related genes that likely underlie their nocturnal and gliding adaptations. Phylogenomic analysis and catalogs of rare genomic changes overwhelmingly support the contested hypothesis that colugos are the sister group to primates (Primatomorpha), to the exclusion of treeshrews. We captured ~140 kb of orthologous sequence data from colugo museum specimens sampled across their range and identified large genetic differences between many geographically isolated populations that may result in a >300% increase in the number of recognized colugo species. Our results identify conservation units to mitigate future losses of this enigmatic mammalian order. PMID:27532052

  4. Intramolecular transposition by a synthetic IS50 (Tn5) derivative

    SciTech Connect

    Tomcsanyi, T.; Phadnis, S.H.; Berg, D.E.

    1990-11-01

    We report the formation of deletions and inversions by intramolecular transposition of Tn5-derived mobile elements. The synthetic transposons used contained the IS50 O and I end segments and the transposase gene, a contraselectable gene encoding sucrose sensitivity (sacB), antibiotic resistance genes, and a plasmid replication origin. Both deletions and inversions were associated with loss of a 300-bp segment that is designated the vector because it is outside of the transposon. Deletions were severalfold more frequent than inversions, perhaps reflecting constraints on DNA twisting or abortive transposition. Restriction and DNA sequence analyses showed that both types of rearrangements extended from onemore » transposon end to many different sites in target DNA. In the case of inversions, transposition generated 9-bp direct repeats of target sequences.« less

  5. What gross weight and range for an advanced HSCT?

    NASA Technical Reports Server (NTRS)

    Driver, Cornelius

    1992-01-01

    A review of studies conducted in 1986 indicates that a 300 passenger, 5500 nautical mile range aircraft should weigh less than 400,000 pounds. Some data from a British Aerospace Society of Automotive Engineers (SAE) paper will be shown that purport to be an advanced Concorde that meets the range payload specifications at a gross weight of 360,000 pounds. Previous studies by Peter Coen of Langley Research Center support these results. The weight of a supersonic transport is important from the point of view of how much effort should be expended in developing lower sonic boom technologies. It is obvious that a 360,000 pound aircraft can be modified to a more acceptable boom level than a 700,000 pound one.

  6. Evaluation of hybrid inverters for strategic environmental research and development program applications

    SciTech Connect

    Ginn, J.W.

    1995-11-01

    The photovoltaic systems test facility at Sandia National Laboratories is evaluating the performance of large hybrid power-processing centers (PPC`s). The primary customer for this work has been the Strategic Environmental Research and Development Program (SERDP) of the Department of Defense. One of the goals of SERDP is to develop power-processing hardware to be used in photovoltaic-hybrid power systems at remote military installations. Power for these installations is presently provided by engine-generators. Currently, hardware for twelve such sites is in various stages of procurement. The subject of this talk is testing of the PPC for the first SERDP system, a 300-kWmore » unit for Superior Valley, a US Navy site at China Lake, California.« less

  7. NOSS flight segment concept study

    NASA Technical Reports Server (NTRS)

    1979-01-01

    An 11 ft wide by 26.5 ft long flat structure weighing almost 14,469 pounds evolved during a low level, inhouse conceptual design study for a national oceanic satellite system spacecraft that would stow directly in the space shuttle. Following STS launch to a 300 Km mission orbit inclination, transfer will be effected to a 800 Km Sun synchronous circular orbit. The instrument completement includes 2 altimeters, 1 scatterometer, 1 large antenna multichannel microwave radiometer, and a coastal zone scanner. The spacecraft, its instruments, and interfaces with STS and TDRSS are described. The mission timeline, potential problem areas, system drivers, and recommended study areas are discussed. Drawings and system block diagrams are included.

  8. Cavity Quantum Acoustic Device in the Multimode Strong Coupling Regime

    NASA Astrophysics Data System (ADS)

    Moores, Bradley A.; Sletten, Lucas R.; Viennot, Jeremie J.; Lehnert, K. W.

    2018-06-01

    We demonstrate an acoustical analog of a circuit quantum electrodynamics system that leverages acoustic properties to enable strong multimode coupling in the dispersive regime while suppressing spontaneous emission to unconfined modes. Specifically, we fabricate and characterize a device that comprises a flux tunable transmon coupled to a 300 μ m long surface acoustic wave resonator. For some modes, the qubit-cavity coupling reaches 6.5 MHz, exceeding the cavity loss rate (200 kHz), qubit linewidth (1.1 MHz), and the cavity free spectral range (4.8 MHz), placing the device in both the strong coupling and strong multimode regimes. With the qubit detuned from the confined modes of the cavity, we observe that the qubit linewidth strongly depends on its frequency, as expected for spontaneous emission of phonons, and we identify operating frequencies where this emission rate is suppressed.

  9. Cavity Quantum Acoustic Device in the Multimode Strong Coupling Regime.

    PubMed

    Moores, Bradley A; Sletten, Lucas R; Viennot, Jeremie J; Lehnert, K W

    2018-06-01

    We demonstrate an acoustical analog of a circuit quantum electrodynamics system that leverages acoustic properties to enable strong multimode coupling in the dispersive regime while suppressing spontaneous emission to unconfined modes. Specifically, we fabricate and characterize a device that comprises a flux tunable transmon coupled to a 300  μm long surface acoustic wave resonator. For some modes, the qubit-cavity coupling reaches 6.5 MHz, exceeding the cavity loss rate (200 kHz), qubit linewidth (1.1 MHz), and the cavity free spectral range (4.8 MHz), placing the device in both the strong coupling and strong multimode regimes. With the qubit detuned from the confined modes of the cavity, we observe that the qubit linewidth strongly depends on its frequency, as expected for spontaneous emission of phonons, and we identify operating frequencies where this emission rate is suppressed.

  10. Improvement in the light sensitivity of the ultrahigh-speed high-sensitivity CCD with a microlens array

    NASA Astrophysics Data System (ADS)

    Hayashida, T.,; Yonai, J.; Kitamura, K.; Arai, T.; Kurita, T.; Tanioka, K.; Maruyama, H.; Etoh, T. Goji; Kitagawa, S.; Hatade, K.; Yamaguchi, T.; Takeuchi, H.; Iida, K.

    2008-02-01

    We are advancing the development of ultrahigh-speed, high-sensitivity CCDs for broadcast use that are capable of capturing smooth slow-motion videos in vivid colors even where lighting is limited, such as at professional baseball games played at night. We have already developed a 300,000 pixel, ultrahigh-speed CCD, and a single CCD color camera that has been used for sports broadcasts and science programs using this CCD. However, there are cases where even higher sensitivity is required, such as when using a telephoto lens during a baseball broadcast or a high-magnification microscope during science programs. This paper provides a summary of our experimental development aimed at further increasing the sensitivity of CCDs using the light-collecting effects of a microlens array.

  11. Measurement of temperature and pressure on the surface of a blunt cone using FBG sensor in hypersonic wind tunnel

    NASA Astrophysics Data System (ADS)

    Prasad, A. S. Guru; Sharath, U.; Nagarjun, V.; Hegde, G. M.; Asokan, S.

    2013-09-01

    Measurement of temperature and pressure exerted on the leeward surface of a blunt cone specimen has been demonstrated in the present work in a hypersonic wind tunnel using fiber Bragg grating (FBG) sensors. The experiments were conducted on a 30° apex-angle blunt cone with 51 mm base diameter at wind flow speeds of Mach 6.5 and 8.35 in a 300 mm hypersonic wind tunnel of Indian Institute of Science, Bangalore. A special pressure insensitive temperature sensor probe along with the conventional bare FBG sensors was used for explicit temperature and aerodynamic pressure measurement respectively on the leeward surface of the specimen. computational fluid dynamics (CFD) simulation of the flow field around the blunt cone specimen has also been carried out to obtain the temperature and pressure at conditions analogous to experiments. The results obtained from FBG sensors and the CFD simulations are found to be in good agreement with each other.

  12. Photovoltaic power generation; Proceedings of the EC Contractors' Meeting, Hamburg, West Germany, July 12, 13, 1983

    NASA Astrophysics Data System (ADS)

    Palz, W.

    Several operational examples of photovoltaic (PV) power generation systems in Europe are described. The systems include: a 300 kW power plant in Pellworm, West Germany; the Tremiti desalination plant in Tremiti, Italy; and the Kythnos PV power plant in Kythnos, Greece. Consideration is also given to a PV-powered swimming pool heating system in Chevretogne, Belgium; a rural electrification program using PV power plants in French Guyana; a solar-wind project on Terschelling Island, the Netherlands; and a PV power plant for hydrogen production and water pumping in Hoboken, Belgium. A 30-kW power station in Marchwood, England and the Nice airport survey and control system are also cited as examples of successful PV power generation systems.

  13. Modulating light propagation in ZnO-Cu₂O-inverse opal solar cells for enhanced photocurrents.

    PubMed

    Yantara, Natalia; Pham, Thi Thu Trang; Boix, Pablo P; Mathews, Nripan

    2015-09-07

    The advantages of employing an interconnected periodic ZnO morphology, i.e. an inverse opal structure, in electrodeposited ZnO/Cu2O devices are presented. The solar cells are fabricated using low cost solution based methods such as spin coating and electrodeposition. The impact of inverse opal geometry, mainly the diameter and thickness, is scrutinized. By employing 3 layers of an inverse opal structure with a 300 nm pore diameter, higher short circuit photocurrents (∼84% improvement) are observed; however the open circuit voltages decrease with increasing interfacial area. Optical simulation using a finite difference time domain method shows that the inverse opal structure modulates light propagation within the devices such that more photons are absorbed close to the ZnO/Cu2O junction. This increases the collection probability resulting in improved short circuit currents.

  14. Influence of the astrophysical requirements on dilution refrigerator design

    NASA Astrophysics Data System (ADS)

    Sirbi, Adriana; Pouilloux, Benjamin; Benoit, Alain; Lamarre, Jean-Michel

    1999-12-01

    A 300 K to 0.1 K space prototype is developed in cooperation with CRTBT, IAS Air Liquide and RAL, under CNES and ESA contracts, to demonstrate the feasibility of such a cooling system. The heart of the system is a 4 K to 0.1 K open cycle dilution refrigerator circulating 3He and 4He. All the tests are now completed. The design of this system is chosen like the nominal solution for PLANCK/HFI instrument. Since scientific requirements have changed, the design of the prototype has to be adjusted to receive the focal plane of HFI (High Frequency Instrument) instrument of PLANCK. The main goal is to optimise 3He consumption without degrading both mechanical and thermal performances. This paper presents the prototype architecture, the dilution refrigerator and the associated tests. The suitability to PLANCK mission is also assessed.

  15. i RadMat: A thermo-mechanical testing system for in situ high-energy X-ray characterization of radioactive specimens

    DOE PAGES

    Zhang, Xuan; Xu, Chi; Wang, Leyun; ...

    2017-01-27

    Here, we present an in situ Radiated Materials (iRadMat) experimental module designed to interface with a servo-hydraulic load frame for X-ray measurements at beamline 1-ID at the Advanced Photon Source. This new capability allows in situ studies of radioactive specimens subject to thermo-mechanical loading using a suite of high-energy X-ray scattering and imaging techniques. The iRadMat is a radiation-shielded vacuum heating system with the sample rotation-under-load capability. We describe the design features and performances of the iRadMat and present a dataset from a 300 °C uniaxial tensile test of a neutron-irradiated pure Fe specimen to demonstrate its capabilities.

  16. A Supersonic Business-Jet Concept Designed for Low Sonic Boom

    NASA Technical Reports Server (NTRS)

    Mack, Robert J.

    2003-01-01

    Ongoing human-response studies of sonic-boom noise indicated that a previous level of 1.0 psf might still be too annoying. This led to studies of a Supersonic Business Jet (SBJ), which might generate lower, more acceptable ground overpressures. To determine whether methods for designing a High Speed Civil Transport (HSCT) could be successfully applied, a SBJ concept was designed at the langley Research Center. It would cruise at Mach 2, carry 10 passengers for 4000 nautical miles, and generate a 0.50 psf or less on the ground under the flight path at start of cruise. Results indicated that a 10-passenger, low-boom SBJ design was just as technically demanding as a 300-passenger, low-boom HSCT design. In this report, the sources of these technical problems are identified, and ideas for addressing them are discussed.

  17. Kasei Vallis of Mars: Dating the Interplay of Tectonics and Geomorphology

    NASA Technical Reports Server (NTRS)

    Wise, D. U.

    1985-01-01

    Crater density age dates on more than 250 small geomorphic surfaces in the Kasei Region of Mars show clusterings indicative of times of peak geomorphic and tectonic activity. Kasei Vallis is part of a 300 km wide channel system breaching a N-S trending ancient basement high (+50,000 crater age) separating the Chryse Basin from the Tharsis Volcanic Province of Mars. The basement high was covered by a least 3 groups of probable volcanic deposits. Major regional fracturing took place at age 4,000 to 5,000 and was immediately followed by deposition of regional volcanics of the Fesenkov Plains (age 3,000 to 4,200). Younger clusterings of dates in the 900 to 1,500 and 500 to 700 range represent only minor modification of the basic tectonic geomorphic landform. The data suggest that Kasei gap is a structurally controlled breach of a buried ridge by a rather brief episode of fluvial activity.

  18. The combustion of different air distribution of foursquare tangential circle boiler by numerical simulation

    NASA Astrophysics Data System (ADS)

    Guo, Yue; Du, Lei; Jiang, Long; Li, Qing; Zhao, Zhenning

    2017-01-01

    In this paper, the combustion and NOx emission characteristics of a 300 MW tangential boiler are simulated, we obtain the flue gas velocity field in the hearth, component concentration distribution of temperature field and combustion products, and the speed, temperature, concentration of oxygen and NOx emissions compared with the test results in the waisting air distribution conditions, found the simulation values coincide well with the test value, to verify the rationality of the model. At the same time, the flow field in the furnace, the combustion and the influence of NOx emission characteristics are simulated by different conditions, including compared with primary zone secondary waisting air distribution, uniform air distribution and pagodas go down air distribution, the results show that, waisting air distribution is useful to reduce NOx emissions.

  19. Ramstein AB, Landstuhl, Germany. Revised Uniform Summary of Surface Weather Observations (RUSSWO). Parts A-F

    DTIC Science & Technology

    1978-10-10

    23.2 29.1 29.6 3!.0 32.3 33.5 34*5 34.6 34.6 347 ’ 34.7! 34.7’ 4.5 a 300 " 17. 6 22.𔃾 25.8’ 32-2 32.6 34.0’ -5.4, 30.7= 37.6’ 37.7i37.7 37.8137*8 37...1 - 10 -5 17 50/349 6 2*9 9457 48/ 347 _ -114 K___ ___ -516-__ Z 4/ 41 10 3 Ri.Htt 32 31 63F ot7 7F SP :3 o ( Wtt ulb Oy Bul R ol. i Hum. 80 93 F...43283 -21 15-_ 29.V4 -. Z8j ._16-j .5 417>. NOWO __ * DATA PRECESSING RRAnCHri US IATC PSYCHROMETRIC SUMMARY AIR .EATHER SEPVICC/UAC 34050 R--11STETN

  20. Advanced Nondestructive Evaluation (NDE) for Retirement for Cause/Engine Structural Integrity Program (RFC/RNSIP)

    DTIC Science & Technology

    2000-08-01

    7.5mVpp @ 20KHz 6Vpp @ 6MHz Input N/A N/A 206mVpp @ 6MHz 157mVpp @ 6MHz 66mVpp @ 6MHz 99mVpp @ 6MHz 91mVpp @ 6MHz No Input 35mVpp @ 113KHz 3mVpp...170MHz 8.5mVpp @ 200MHz 13mVpp @ 200MHz 22mVpp @ 113KHz 5mVpp @ 113KHz 4.5mVpp @ 113KHz 6Vpp @ 6MHz Input N/A N/A 300mVpp @ 6MHz 285mVpp

  1. History of Smallpox and Its Spread in Human Populations.

    PubMed

    Thèves, Catherine; Crubézy, Eric; Biagini, Philippe

    2016-08-01

    Smallpox is considered among the most devastating of human diseases. Its spread in populations, initiated for thousands of years following a probable transmission from an animal host, was concomitant with movements of people across regions and continents, trade and wars. Literature permitted to retrace the occurrence of epidemics from ancient times to recent human history, smallpox having affected all levels of past society including famous monarchs. The disease was officially declared eradicated in 1979 following intensive vaccination campaigns.Paleomicrobiology dedicated to variola virus is restricted to few studies, most unsuccessful, involving ancient material. Only one recent approach allowed the identification of viral DNA fragments from lung tissue of a 300-year-old body excavated from permafrost in Eastern Siberia; phylogenetic analysis revealed that this ancient strain was distinct from those described during the 20th century.

  2. Contributions on the Subject of Longitudinal Movements of Aircraft in Wind Shears. Ph.D. Thesis - Technischen Univ., 1983

    NASA Technical Reports Server (NTRS)

    Krauspe, P.

    1985-01-01

    The effect of downburst-type wind shears on the longitudinal dynamic behavior of an unguided aircraft is simulated numerically on the basis of published meteorological data and the flight characteristics of an A300-B passenger jet. The nonlinear differential equations of the aircraft motion are linearized by conventional methods, and the wind effects are introduced via the linear derivatives of the wind components referred to the wind gradients to obtain simplified technical models of the longitudinal response to all possible types of constant-gradient wind shears during the first 20-60 sec. Graphs, maps, and diagrams are provided, and a number of accidents presumed to have involved wind shears are analyzed in detail.

  3. Local impact of humidification on degradation in polymer electrolyte fuel cells

    NASA Astrophysics Data System (ADS)

    Sanchez, Daniel G.; Ruiu, Tiziana; Biswas, Indro; Schulze, Mathias; Helmly, Stefan; Friedrich, K. Andreas

    2017-06-01

    The water level in a polymer electrolyte membrane fuel cell (PEMFC) affects the durability as is seen from the degradation processes during operation a PEMFC with fully- and nonhumidified gas streams as analyzed using an in-situ segmented cell for local current density measurements during a 300 h test operating under constant conditions and using ex situ SEM/EDX and XPS post-test analysis of specific regions. The impact of the RH on spatial distribution of the degradation process results from different water distribution giving different chemical environments. Under nonhumidified gas streams, the cathode inlet region exhibits increased degradation, whereas with fully humidified gases the bottom of the cell had the higher performance losses. The degradation and the degree of reversibility produced by Pt dissolution, PTFE defluorination, and contaminants such as silicon (Si) and nickel (Ni) were locally evaluated.

  4. Absolute-length determination of a long-baseline Fabry-Perot cavity by means of resonating modulation sidebands.

    PubMed

    Araya, A; Telada, S; Tochikubo, K; Taniguchi, S; Takahashi, R; Kawabe, K; Tatsumi, D; Yamazaki, T; Kawamura, S; Miyoki, S; Moriwaki, S; Musha, M; Nagano, S; Fujimoto, M K; Horikoshi, K; Mio, N; Naito, Y; Takamori, A; Yamamoto, K

    1999-05-01

    A new method has been demonstrated for absolute-length measurements of a long-baseline Fabry-Perot cavity by use of phase-modulated light. This method is based on determination of a free spectral range (FSR) of the cavity from the frequency difference between a carrier and phase-modulation sidebands, both of which resonate in the cavity. Sensitive response of the Fabry-Perot cavity near resonant frequencies ensures accurate determination of the FSR and thus of the absolute length of the cavity. This method was applied to a 300-m Fabry-Perot cavity of the TAMA gravitational wave detector that is being developed at the National Astronomical Observatory, Tokyo. With a modulation frequency of approximately 12 MHz, we successfully determined the absolute cavity length with resolution of 1 microm (3 x 10(-9) in strain) and observed local ground strain variations of 6 x 10(-8).

  5. Description of Liquid Nitrogen Experimental Test Facility

    NASA Technical Reports Server (NTRS)

    Jurns, John M.; Jacobs, Richard E.; Saiyed, Naseem H.

    1991-01-01

    The Liquid Nitrogen Test Facility is a unique test facility for ground-based liquid nitrogen experimentation. The test rig consists of an insulated tank of approximately 12.5 cubic ft in volume, which is supplied with liquid nitrogen from a 300 gal dewar via a vacuum jacketed piping system. The test tank is fitted with pressure and temperature measuring instrumentation, and with two view ports which allow visual observation of test conditions. To demonstrate the capabilities of the facility, the initial test program is briefly described. The objective of the test program is to measure the condensation rate by injecting liquid nitrogen as a subcooled spray into the ullage of a tank 50 percent full of liquid nitrogen at saturated conditions. The condensation rate of the nitrogen vapor on the subcooled spray can be analytically modeled, and results validated and corrected by experimentally measuring the vapor condensation on liquid sprays.

  6. Description of liquid nitrogen experimental test facility

    NASA Technical Reports Server (NTRS)

    Jurns, J. M.; Jacobs, R. E.; Saiyed, N. H.

    1992-01-01

    The Liquid Nitrogen Test Facility is a unique test facility for ground-based liquid nitrogen experimentation. The test rig consists of an insulated tank of approximately 12.5 cubic ft in volume, which is supplied with liquid nitrogen from a 300 gal dewar via a vacuum jacketed piping system. The test tank is fitted with pressure and temperature measuring instrumentation, and with two view ports which allow visual observation of test conditions. To demonstrate the capabilities of the facility, the initial test program is briefly described. The objective of the test program is to measure the condensation rate by injecting liquid nitrogen as a subcooled spray into the ullage of a tank 50 percent full of liquid nitrogen at saturated conditions. The condensation rate of the nitrogen vapor on the subcooled spray can be analytically modeled, and results validated and corrected by experimentally measuring the vapor condensation on liquid sprays.

  7. Quantifying fenbendazole and its metabolites in self-medicating wild red grouse Lagopus lagopus scoticus using an HPLC-MS-MS approach.

    PubMed

    Adam, Aileen; Webster, Lucy M I; Mullen, William; Keller, Lukas F; Johnson, Paul C D

    2011-05-11

    On red grouse estates in the UK the nematode parasite Trichostrongylus tenuis is often controlled by application of grit medicated with the anthelmintic fenbendazole (FBZ). To date, assessment of the efficacy has been inhibited by the inability to quantify uptake of FBZ by the birds. We have developed a simple and sensitive HPLC-MS-MS method for detecting and quantifying FBZ and its metabolites from a 300 mg sample of red grouse liver. This method could be used to improve the efficacy of medicated grit treatment by allowing the identification of conditions and application methods that optimize the uptake of FBZ. With the necessary modifications, our method will also be applicable to other wildlife species where self-medication is used for parasite control. Copyright © 2011 Elsevier B.V. All rights reserved.

  8. Development of Static Balance Measurement and Correction Compound Platform for Single Blade of Controllable Pitch Propeller

    NASA Astrophysics Data System (ADS)

    Chao, Zhang; Shijie, Su; Yilin, Yang; Guofu, Wang; Chao, Wang

    2017-11-01

    Aiming at the static balance of the controllable pitch propeller (CPP), a high efficiency static balance method based on the double-layer structure of the measuring table and gantry robot is adopted to realize the integration of torque measurement and corrected polish for controllable pitch propeller blade. The control system was developed by Microsoft Visual Studio 2015, and a composite platform prototype was developed. Through this prototype, conduct an experiment on the complete process of torque measurement and corrected polish based on a 300kg class controllable pitch propeller blade. The results show that the composite platform can correct the static balance of blade with a correct, efficient and labor-saving operation, and can replace the traditional method on static balance of the blade.

  9. Growth and characterization of an InSb infrared photoconductor on Si via an AlSb/GaSb buffer

    NASA Astrophysics Data System (ADS)

    Jia, Bo Wen; Tan, Kian Hua; Loke, Wan Khai; Wicaksono, Satrio; Yoon, Soon Fatt

    2018-05-01

    A 99.6% relaxed InSb layer is grown on a 6° offcut (1 0 0) Si substrate via an AlSb/GaSb buffer using molecular beam epitaxy (MBE). A 200 nm GaSb buffer is first grown on Si and the lattice mismatch between them is accommodated by an interfacial misfit (IMF) array consisting of uniformly distributed 90° misfit dislocations. Si delta doping is introduced during the growth of GaSb to reduce the density of threading dislocation. Subsequently, a 50 nm AlSb buffer is grown followed by a 0.8 μm InSb layer. The InSb layer exhibits a 300 K electron mobility of 22,300 cm2/Vs. An InSb photoconductor on Si is demonstrated with a photoconductive gain from 77 K to 200 K under a 700 °C maintained blackbody.

  10. Investigation of Gate-Stacked In-Ga-Zn-O TFTs with Ga-Zn-O Source/Drain Electrodes by Atmospheric Pressure Plasma-Enhanced Chemical Vapor Deposition.

    PubMed

    Wu, Chien-Hung; Chang, Kow-Ming; Chen, Yi-Ming; Huang, Bo-Wen; Zhang, Yu-Xin; Wang, Shui-Jinn; Hsu, Jui-Mei

    2018-03-01

    Atmospheric pressure plasma-enhanced chemical vapor deposition (AP-PECVD) was employed for the fabrication of indium gallium zinc oxide thin-film transistors (IGZO TFTs) with high transparent gallium zinc oxide (GZO) source/drain electrodes. The influence of post-deposition annealing (PDA) temperature on GZO source/drain and device performance was studied. Device with a 300 °C annealing demonstrated excellent electrical characteristics with on/off current ratio of 2.13 × 108, saturation mobility of 10 cm2/V-s, and low subthreshold swing of 0.2 V/dec. The gate stacked LaAlO3/ZrO2 of AP-IGZO TFTs with highly transparent and conductive AP-GZO source/drain electrode show excellent gate control ability at a low operating voltage.

  11. Generating electricity while walking with loads.

    PubMed

    Rome, Lawrence C; Flynn, Louis; Goldman, Evan M; Yoo, Taeseung D

    2005-09-09

    We have developed the suspended-load backpack, which converts mechanical energy from the vertical movement of carried loads (weighing 20 to 38 kilograms) to electricity during normal walking [generating up to 7.4 watts, or a 300-fold increase over previous shoe devices (20 milliwatts)]. Unexpectedly, little extra metabolic energy (as compared to that expended carrying a rigid backpack) is required during electricity generation. This is probably due to a compensatory change in gait or loading regime, which reduces the metabolic power required for walking. This electricity generation can help give field scientists, explorers, and disaster-relief workers freedom from the heavy weight of replacement batteries and thereby extend their ability to operate in remote areas.

  12. Radiation hardening of MOS devices by boron. [for stabilizing gate threshold potential of field effect device

    NASA Technical Reports Server (NTRS)

    Danchenko, V. (Inventor)

    1974-01-01

    A technique is described for radiation hardening of MOS devices and specifically for stabilizing the gate threshold potential at room temperature of a radiation subjected MOS field-effect device with a semiconductor substrate, an insulating layer of oxide on the substrate, and a gate electrode disposed on the insulating layer. The boron is introduced within a layer of the oxide of about 100 A-300 A thickness immediately adjacent the semiconductor-insulator interface. The concentration of boron in the oxide layer is preferably maintained on the order of 10 to the 18th power atoms/cu cm. The technique serves to reduce and substantially annihilate radiation induced positive gate charge accumulations.

  13. The Joint Astrophysical Plasmadynamic Experiment (J-PEX): a high-resolution rocket spectrometer

    NASA Astrophysics Data System (ADS)

    Barstow, Martin A.; Bannister, Nigel P.; Cruddace, Raymond G.; Kowalski, Michael P.; Wood, Kent S.; Yentis, Daryl J.; Gursky, Herbert; Barbee, Troy W., Jr.; Goldstein, William H.; Kordas, Joseph F.; Fritz, Gilbert G.; Culhane, J. Leonard; Lapington, Jonathan S.

    2003-02-01

    We report on the successful sounding rocket flight of the high resolution (R=3000-4000) J-PEX EUV spectrometer. J-PEX is a novel normal incidence instrument, which combines the focusing and dispersive elements of the spectrometer into a single optical element, a multilayer-coated grating. The high spectral resolution achieved has had to be matched by unprecedented high spatial resolution in the imaging microchannel plate detector used to record the data. We illustrate the performance of the complete instrument through an analysis of the 220-245Å spectrum of the white dwarf G191-B2B obtained with a 300 second exposure. The high resolution allows us to detect a low-density ionized helium component along the line of sight to the star and individual absorption lines from heavier elements in the photosphere.

  14. Antibacterial Titanium Produced Using Selective Laser Melting

    NASA Astrophysics Data System (ADS)

    Macpherson, Andrew; Li, Xiaopeng; McCormick, Paul; Ren, Ling; Yang, Ke; Sercombe, Timothy B.

    2017-12-01

    Titanium and titanium alloys used in current medical and dental applications do not possess antibacterial properties, and therefore, postoperative infection remains a significant risk. Recently, the addition of silver and copper to conventional biomaterials has been shown to produce a material with good antibacterial properties. In this article, we investigate selective laser melting as a method of producing antibacterial Ti-6Al-4V containing elemental additions of Cu or Ag. The addition of Ag had no effect on the microstructure or strength, but it did result in a 300% increase in the ductility of the alloy. In contrast, the addition of Cu resulted in an increase in strength but in a decrease in ductility, along with a change in the structure of the material. The Cu-containing alloy also showed moderate antibacterial properties and was superior to the Ag-containing alloy.

  15. Charge Sharing and Charge Loss in a Cadmium-Zinc-Telluride Fine-Pixel Detector Array

    NASA Technical Reports Server (NTRS)

    Gaskin, J. A.; Sharma, D. P.; Ramsey, B. D.; Six, N. Frank (Technical Monitor)

    2002-01-01

    Because of its high atomic number, room temperature operation, low noise, and high spatial resolution a Cadmium-Zinc-Telluride (CZT) multi-pixel detector is ideal for hard x-ray astrophysical observation. As part of on-going research at MSFC (Marshall Space Flight Center) to develop multi-pixel CdZnTe detectors for this purpose, we have measured charge sharing and charge loss for a 4x4 (750micron pitch), lmm thick pixel array and modeled these results using a Monte-Carlo simulation. This model was then used to predict the amount of charge sharing for a much finer pixel array (with a 300micron pitch). Future work will enable us to compare the simulated results for the finer array to measured values.

  16. Hydrogen Generation from Biomass-Derived Surgar Alcohols via the Aqueous-Phase Carbohydrate Reforming (ACR) Process

    SciTech Connect

    Randy Cortright

    2006-06-30

    This project involved the investigation and development of catalysts and reactor systems that will be cost-effective to generate hydrogen from potential sorbitol streams. The intention was to identify the required catalysts and reactors systems as well as the design, construction, and operation of a 300 grams per hour hydrogen system. Virent was able to accomplish this objective with a system that generates 2.2 kgs an hour of gas containing both hydrogen and alkanes that relied directly on the work performed under this grant. This system, funded in part by the local Madison utility, Madison, Gas & Electric (MGE), is describedmore » further in the report. The design and development of this system should provide the necessary scale-up information for the generation of hydrogen from corn-derived sorbitol.« less

  17. Merlin - Massively parallel heterogeneous computing

    NASA Technical Reports Server (NTRS)

    Wittie, Larry; Maples, Creve

    1989-01-01

    Hardware and software for Merlin, a new kind of massively parallel computing system, are described. Eight computers are linked as a 300-MIPS prototype to develop system software for a larger Merlin network with 16 to 64 nodes, totaling 600 to 3000 MIPS. These working prototypes help refine a mapped reflective memory technique that offers a new, very general way of linking many types of computer to form supercomputers. Processors share data selectively and rapidly on a word-by-word basis. Fast firmware virtual circuits are reconfigured to match topological needs of individual application programs. Merlin's low-latency memory-sharing interfaces solve many problems in the design of high-performance computing systems. The Merlin prototypes are intended to run parallel programs for scientific applications and to determine hardware and software needs for a future Teraflops Merlin network.

  18. SAFARI engineering model 50 mK cooler

    NASA Astrophysics Data System (ADS)

    Duband, L.; Duval, J. M.; Luchier, N.

    2014-11-01

    SAFARI is an infrared instrument developed by a European based consortium to be flown in SPICA, a Japanese led mission. The SAFARI detectors are transition edge sensors (TES) and require temperatures down to 50 mK for their operation. For that purpose we have developed a hybrid architecture based on the combination of a 300 mK sorption stage and a small adiabatic demagnetization stage. An engineering model has been designed to provide net heat lifts of 0.4 and 14 μW respectively at 50 and 300 mK, with an overall cycle duration of 48 h and a duty cycle objective of over 75%. The cooler is self-contained, fits in a volume of 156 × 312 × 182 mm and is expected to weigh 5.1 kg. It has been designed to withstand static loads of 120 g and a random vibration level of 21 g RMS.

  19. Multifrequency dial sensing of the atmospheric gaseous constituents using the first and second harmonics of a tunable CO2 laser radiation

    NASA Technical Reports Server (NTRS)

    Zuev, V. E.; Andreev, Y. M.; Voevodin, V. G.; Gribenyukov, A. I.; Kapitanov, V. A.; Sosnin, A. V.; Stuchebrov, G. A.; Khmelnitskii, G. S.

    1986-01-01

    The results of field measurements of concentration of some gaseous components of the atmosphere along the paths, in Sofia, Bulgaria, using a gas analyzer based on the use of a CO2 laser radiation frequency-doubled with ZnGeP2 monocrystals are presented. The gas analyzer is a traditional long path absorption meter. Radiation from the tunable CO2 laser of low pressure and from an additional He-Ne laser is directed to a colliminating hundredfold Gregori telescope with a 300 mm diameter of the principal mirror. The dimensions of the mirrors of a retroreflector 500 x 500 mm and a receiving telescope allow one to totally intercept the beam passed through the atmospheric layer under study and back.

  20. A 150 and 300 kW lightweight diesel aircraft engine design study

    NASA Technical Reports Server (NTRS)

    Brouwers, A. P.

    1980-01-01

    The diesel engine was reinvestigated as an aircraft powerplant through design study conducted to arrive at engine configurations and applicable advanced technologies. Two engines are discussed, a 300 kW six-cylinder engine for twin engine general aviation aircraft and a 150 kW four-cylinder engine for single engine aircraft. Descriptions of each engine include concept drawings, a performance analysis, stress and weight data, and a cost study. This information was used to develop two airplane concepts, a six-place twin and a four-place single engine aircraft. The aircraft study consists of installation drawings, computer generated performance data, aircraft operating costs, and drawings of the resulting airplanes. The performance data show a vast improvement over current gasoline-powered aircraft.