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 were also performed on some rudders fitted on A310 and A300-600 aeroplanes. An extended de-bonding, if... reworked in production. The investigation confirmed that the defects were the result of de-bonding...

  2. 76 FR 1346 - Airworthiness Directives; Airbus Model A300, A300-600, A310, A318, A319, A320, A321, A330-300...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-10

    ... Series Airplanes; and Model A330-201, A330-202, A330- 203, A330-223, A330-243 Airplanes AGENCY: Federal... affected airplanes identified above. This AD requires modifying the flight deck door. This AD was prompted... AD for Model A300, A300- 600, and A310 series airplanes, contact Airbus SAS--EAW...

  3. 75 FR 8551 - Airworthiness Directives; Airbus Model A300, A300-600, and A310 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-25

    ... Airbus type design specifications. This situation, if not corrected, can cause hydraulic system... pressurisation check valves. In some cases, the air conditioning system was contaminated with hydraulic mist. The.... This situation, if not corrected, can cause hydraulic system functional degradation, possibly...

  4. 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

    ... Service Information Airbus has issued A300-600 Airworthiness Limitation Items (ALI) Document AI/SE-M2/95A.1310/07, Issue 12, dated June 2008; A300 ALI Document AI/SE-M2/95A.1308/07, Issue 4, dated June 2008; and A310 ALI Document, AI/SE-M2/95A.1309/07, Issue 7, dated June 2008. The actions described in...

  5. 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

    ... year 2000, life extension exercise programs were launched for Airbus A310 and A300-600 aircraft... products. The MCAI states: During the year 2000, life extension exercise programs were launched for Airbus..., life extension exercise programs were launched for Airbus A310 and A300-600 aircraft. Certification...

  6. 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 greater than that of other transport category airplane designs. Such rudder control sensitivity...

  7. 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

    ... follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 0 2. The FAA amends Sec. 39.13 by removing..., repairs, and replacements defined in Airbus Industrie A300 Supplemental Structural Inspection...

  8. European parabolic flight campaigns with Airbus ZERO-G: Looking back at the A300 and looking forward to the A310

    NASA Astrophysics Data System (ADS)

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

    2015-09-01

    Aircraft parabolic flights repetitively provide up to 23 s 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 Chinese Space Station CSS. The European Space Agency (ESA), the 'Centre National d'Etudes Spatiales' (CNES, French Space Agency) and the 'Deutsches Zentrum für Luft- und Raumfahrt e.V.' (DLR, the German Aerospace Centre) have used the Airbus A300 ZERO-G for research experiments in microgravity, and at Moon and Mars gravity levels, from 1997 until October 2014. The French company Novespace, a subsidiary of CNES, based in Bordeaux, France, is in charge of the organisation of Airbus A300 ZERO-G flights. A total of 104 parabolic flight campaigns have been organised by ESA, CNES and DLR since 1997, including 38 ESA, 34 CNES and 23 DLR microgravity campaigns, two Joint European ESA-CNES-DLR Partial-g Parabolic Flight Campaigns, and seven ESA Student campaigns. After 17 years of good and loyal services, this European workhorse for microgravity research in parabolic flights has been retired. The successor aircraft, the Airbus A310 ZERO-G, is being prepared for a first ESA-CNES-DLR cooperative campaign in Spring 2015. This paper looks back over 17 years of microgravity research in parabolic flights with the A300 ZERO-G, and introduces the new A310 ZERO-G that will be used from 2015 onwards.

  9. 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

    ... A300- 600 aeroplanes has shown that a reinforcement of the upper fuselage circumferential joint at FR... Fatigue Damage (WFD) calculation on A300- 600 aeroplanes has shown that a reinforcement of the upper... structural integrity of the aeroplane. For the reasons described above, this AD requires the reinforcement...

  10. 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

    ... INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM-116, Transport Airplane... of Additional Change We have specified the issue numbers of each Airbus operations engineering... missing or damaged, the instructions contained in Airbus A310 Operations Engineering Bulletin 160, Issue...

  11. 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

    .... Consequently, this AD also requires the repetitive lubrication task. For A300-600 and A300-600ST aeroplanes... applicable replacements required by paragraphs (i) and (j) of this AD are done. Lubrication of the MLG... April 1, 2010. Repeat the cleaning and lubrication thereafter at intervals not to exceed 1,500...

  12. 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

    .... Consequently, this AD also requires the repetitive lubrication task. For A300-600 and A300-600ST aeroplanes... replacements required by paragraphs (i) and (j) of this AD are done. Lubrication of the MLG Assembly (l) Within... 1, 2010. Repeat the cleaning and lubrication thereafter at intervals not to exceed 1,500...

  13. 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

    ... integrity of the crossbeam on NLG FR15A web attachment fitting of rack 107VU. Rack 107VU contains major... fitting. As the A300 and A300-600 aeroplanes share this design feature, they are also affected. The... structural integrity of the crossbeam on NLG FR15A web attachment fitting of rack 107VU. Rack 107VU...

  14. 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

    ... equipped with General Electric engines. Investigation of these findings indicates that this problem is... A300-600 aircraft equipped with General Electric engines. Investigation of these findings indicates... A300-600 aircraft equipped with General Electric engines. Investigation of these findings...

  15. 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

    ... Damage (WFD) calculation on A300-600 aeroplanes has shown that a reinforcement of the upper fuselage... reinforcement of the upper fuselage circumferential joint at FR (frame) 58 is necessary to enable the aeroplane... requires the reinforcement of the affected fuselage frame butt joint. You may obtain further information...

  16. 15 CFR 8a.300 - Admission.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Admission. 8a.300 Section 8a.300... in Admission and Recruitment Prohibited § 8a.300 Admission. (a) General. No person shall, on the... which §§ 8a.300 through §§ 8a.310 apply, except as provided in §§ 8a.225 and §§ 8a.230. (b)...

  17. 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

    ...We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition...

  18. 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

    ... unsafe condition as: The ball screw nut assemblies of the first 70 Trimmable Horizontal Stabilizer... engaged and not detected could lead to failure of the secondary load path, which would likely result in... products. The MCAI states: The ball screw nut assemblies of the first 70 Trimmable Horizontal...

  19. 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.

  20. 77 FR 62182 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-12

    ... Directives; Airbus Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed... 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 Model A310 series airplanes. This proposed...

  1. 78 FR 15874 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-13

    ...-112-AD; Amendment 39-17372; AD 2013-04-14] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes... F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300- 600 series airplanes); and Model A310 series airplanes. This AD was prompted by a report of...

  2. 78 FR 9581 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ...-052-AD; Amendment 39-17346; AD 2013-03-11] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes..., and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called A300-600 series airplanes); and Model A310 series airplanes. This AD was prompted by reports of cracking...

  3. 77 FR 59149 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-26

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes..., and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called A300-600 series airplanes); and Model A310 series airplanes. This proposed AD was prompted by reports of...

  4. 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

    ... docket. Relevant Service Information Airbus has issued All Operators Telexes A300-71A6029, including... mounting yoke, in accordance with Airbus All Operators Telex A300-71A6029 or A310-71A2036, both dated March... determine if it is ruptured, in accordance with Airbus All Operators Telex A300-71A6029 or...

  5. 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

    ... the old designed accumulators installed on certain hydraulic systems, the replacement of those... to avoid installation of old designed accumulators on the affected hydraulic systems. You may obtain... for explosive failure of the * * * hydraulic accumulator. This condition, if not detected...

  6. 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

    ...-203, -204, -222, - 304, -322, and -324 Airplanes AGENCY: Federal Aviation Administration (FAA), DOT... applies to Model A310-203, -204, -222, -304, -322, and -324 airplanes, certificated in any category, all... (whichever occurs later) Model A310-203, A310-204, and A310- 1 and 2 Prior to the Within 1,500 flight...

  7. 76 FR 69168 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-08

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes..., 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 A310 series airplanes....

  8. 75 FR 6852 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-12

    .... The MCAI describes the unsafe condition as: Following scheduled maintenance, an A310 operator reported...., Washington, DC. FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM... maintenance, an A310 operator reported finding cracks around the wing top skin panels fastener holes at Rib...

  9. 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

    ...., Washington, DC. FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM... the economic burden on any operator or increase the scope of the AD. Differences Between This AD and... those in the MCAI to ensure the AD is clear for U.S. operators and is enforceable. In making...

  10. 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

    ... specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this... solution has been developed that terminates the de-activation requirement and invalidates the...

  11. 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

    ... and uncontrolled fire (in case of fire ignited upstream the High Pressure Valve (HPV)). * * * * * The... fire (in case of fire ignited upstream the High Pressure Valve (HPV)). For the reasons explained above... Pressure Valve (HPV)). * * * * * Compliance (f) You are responsible for having the actions required by...

  12. 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

    ..., Revision 02, dated June 10, 2010 (for Model A310 series airplanes). (1) If missing pipes, distortions, or...-044-AD; Amendment 39-16736; AD 2011-14-01] RIN 2120-AA64 Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes...

  13. A 300-MHz digitally compensated SAW oscillator.

    PubMed

    Cowan, W D; Slobodnik, A R; Roberts, G A; Silva, J H

    1988-01-01

    A method for compensating for the inherent temperature sensitivity of surface-acoustic-wave (SAW) oscillators is described. Results for a 300-MHz digitally compensated SAW oscillator (DCSO) show a reduction of temperature-induced frequency variation from +/-125 parts per million to +/-1.4 parts per million over the temperature range of -23 to 75 degrees C. This is accomplished using simple digital circuitry and microprocessor control. The temperature-sensing scheme, using a SAW structure with two delay paths of different temperature sensitivity on the same AT-cut quartz substrate, virtually eliminates thermal resistance and time-constant problems. Advantages over ovenized systems include fast warmup; reduced size, weight, and power dissipation; low cost potential; and the ability to compensate for other sources of frequency drift.

  14. 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.

  15. 76 FR 42 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ... Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or...) of this AD; or modification of the reinforcement angle runout in accordance with Airbus Service... reinforcement angle runout in accordance with Airbus Service Bulletin A310-53-2019, Revision 3, dated...

  16. 76 FR 27232 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ..., 1979); and 3. Will not have a significant economic impact, positive or negative, on a substantial...) of this AD; or modification of the reinforcement angle runout in accordance with Airbus Service... reinforcement angle runout in accordance with Airbus Service Bulletin A310-53-2019, Revision 3, dated...

  17. 76 FR 50 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Airbus Model A310 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of...

  18. 76 FR 39035 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-05

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Airbus Model A310 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of...

  19. 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.

  20. Modeling a 300 kHz Bathymetric Sonar System

    DTIC Science & Technology

    1992-09-01

    AD-A257 378 /7 Modeling A 300 kHz Bathymetric Sonar System by Kenneth Alan Malmquist B.S., Drexel University, Philadelphia (1985) Submitted in...Massachusetts Institute of Technology/ Woods Hole Oceanographic Institution 92-28033 Vll1 Nlf • 92 BLANK PAR Modeling A 300 kIz Bathymetric Sonar System by...Deep Submergence Laboratory has developed a family of calibrated high frequency bathymetric sonar systems for underwater survey. It is useful to have a

  1. 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…

  2. 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.

  3. 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.

  4. Performance of a 300-horsepower Hispano-Suiza airplane engine

    NASA Technical Reports Server (NTRS)

    Sparrow, S W; White, H S

    1921-01-01

    The National Bureau of Standards tested a 300-horsepower Hispano-Suiza engine to determine the characteristic performance of the engine at various altitudes. The engine was operated at the ground, at 25,000 feet, and at intermediate altitudes, both at full loads similar to those that would be imposed upon the engine at various speeds by a propeller whose normal full-load speed was 1,800 r.p.m. Friction horsepower also was determined in order that the mechanical efficiency of the engine might be calculated. From the test data there were computed the brake horsepower, brake mean effective pressure, specific fuel consumption, mixture ratio, jacket loss, exhaust loss, and thermal, mechanical, and volumetric efficiencies. A record of jacket water temperatures, oil temperatures, manifold pressures, etc., shows the conditions under which the test was made.

  5. CFD simulation of a 300 Hz thermoacoustic standing wave engine

    NASA Astrophysics Data System (ADS)

    Yu, Guoyao; Dai, W.; Luo, Ercang

    2010-09-01

    High frequency operation of standing wave thermoacoustic heat engines is attractive for space applications due to compact size and high reliability. To expedite practical use, further improvement and optimization should be based on deep understanding and quantitative analysis. This article focuses on using computational fluid dynamics (CFD) to investigate nonlinear phenomena and processes of a 300 Hz standing wave thermoacoustic engine (SWTE). The calculated model was tested in detail, which indicated that the co-axially stacked tube model was suitable for the simulation of SWTEs. Two methods of imposing temperature gradient across the stack were studied, and the processes of mean pressure increasing, pressure wave amplification and saturation were obtained under the thermal boundary condition of applying heating power. The acoustic fields were given, and the flow vortices and their evolution in both ends of the stack and resonator were observed. Moreover, a comparison between the simulation and experiments was made, which demonstrated the validity and power of the CFD simulation for characterizing complicated nonlinear phenomenon involved in the self-excited SWTEs.

  6. 77 FR 66772 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ... A300-600 Airworthiness Limitations Section (ALS) Part 2. Airbus have recently revised the A300-600 and..., 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...

  7. Hydrogen sorption in titanium alloys with a symmetric {Sigma}5(310) tilt grain boundary and a (310) surface

    SciTech Connect

    Kulkova, S. E.; Bakulin, A. V.; Kulkov, S. S.; Hocker, S.; Schmauder, S.

    2012-09-15

    The hydrogen sorption in intermetallic B2 TiM (M = Ni, Co, Pd) with a symmetric {Sigma}5(310) tilt grain boundary and a (310) surface is studied by density functional theory methods. The effect of hydrogen on the electronic characteristics of the alloys is analyzed as a function of a sorption position at the interfaces. The hydrogen sorption energy is shown to depend on the local environment of hydrogen; on the whole, hydrogen at the interfaces prefers titanium-rich positions. The hydrogen sorption energy in metal-rich positions decreases when the d shell of the second alloy component is filled with electrons. The grain-boundary energy, the surface energy, and the hydrogen segregation energies to the interfaces are calculated. Hydrogen sorption in titanium alloys is shown to decrease Griffith work and to favor brittle fracture along tilt grain boundaries.

  8. [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.

  9. Design of a 300 GHz Band TWT with a Folded Waveguide Fabricated by Microelectromechanical Systems

    NASA Astrophysics Data System (ADS)

    Tsutaki, Kunio; Neo, Yoichiro; Mimura, Hidenori; Masuda, Norio; Yoshida, Mitsuru

    2016-12-01

    For future broadband wireless links, we have designed a 300 GHz band traveling wave tube (TWT) with a folded waveguide fabricated by microelectromechanical systems (MEMS). The TWT operates at a beam voltage of 12 kV and a beam current of 8.3 mA. The classical large signal simulation code predicts the output power greater than 1 W and gain larger than 20 dB over the bandwidth from 280 to 300 GHz.

  10. 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.

  11. 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.

  12. 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.

  13. Automatic position control of a 300,000-ton ship ocean mining systems

    SciTech Connect

    Brink, A.W.; Chung, J.S.

    1982-12-01

    Extensive computer simulation and performance analysis and assessment have been carried out for the dynamic positioning control of a large, commercial ocean mining ship/pipe system, and selective results are presented. It is tentatively concluded that automatic position control, with a manual override option, of a 300,000-ton ship with 18 thrusters of 4500 hp and an 18,000 ft long lift pipe system would be feasible for commercial operations of a preliminary mining system in the Pacific Ocean. The preliminary system employs a self-propelled miner. For the feasibility study, we have performed the following; the thruster power estimate, a subsequent selection of an azimuthing ship thruster system configuration, steady-state and dynamic motion of the ship-pipe system, track-keeping, turning and station-keeping control, design of an automatic control system, and nonlinear control simulation during mining operations and selective contingency situations. For the development of commercial systems, the small-size, test-mining system does not provide all the design data. It is much larger, and subsequently, requires development of more sophisticated technology and engineering capabilities. The present method of analysis and simulation can be applied to many other mining system analyses, and to the position keeping control of deepsea drilling systems, and deepsea pipelaying.

  14. A 300 yr ice-core black carbon record from Queen Maud Land, East Antarctic

    NASA Astrophysics Data System (ADS)

    Bisiaux, M. M.; Edwards, R.; McConnell, J. R.; Anschuetz, H.

    2009-12-01

    Black carbon aerosols (BC), from Southern Hemisphere biomass burning and fossil fuel combustion are deposited to the Antarctic ice cap recording a history of BC over the remote Southern Hemisphere. Here we present a 300 yr ice-core BC record from Queen Maud Land, East Antarctica spanning calendar years 1706 to 1997. The 30.3 m core was drilled in 2007 at site NUS07-1 (73.724 S, 7.940 E, 3188 m) as part of the Norwegian-US Scientific Traverse of East Antarctica. BC particles < 500 nm in diameter were determined using a continuous ice-core melter system coupled to a liquid to aerosol, single particle soot photometer. The mean ice-core BC concentration was 0.170 ng g-1 (n = 292) with a standard deviation of 0.083 ng g-1. The record displays decadal and annual variability with a significant (AR-1, 95%) ~50 yr periodicity and ENSO like periodicities from 3 to 8 yr. Reconstruction of the time series using the 50 yr periodicity reveals similarities with Southern Hemisphere air temperature. Strong El-Nino periods were generally associated with a reduction in BC concentration suggesting changes in atmospheric circulation or reduced emissions from tropical dry season fires.

  15. Measurement of new particle formation at several altitudes on a 300 m meteorological observation tower

    NASA Astrophysics Data System (ADS)

    Park, M.; Yum, S. S.; Kim, N.

    2014-12-01

    Since new particle formation (NPF) affects aerosol number size distribution and subsequently the newly formed particles can grow enough to act as cloud condensation nuclei, understanding NPF mechanism is crucially important as a step towards a better understanding of aerosol life cycle and its effects on cloud microphysical and radiative properties. However, not clearly understood are at what altitudes NPF actually occurs, what the spatial scale of NPF is, and what are the good meteorological conditions that lead to NPF. In this study, we analyze the data that will be obtained from a 300 m meteorological observation tower to have a better understanding of where NPF occurs and the meteorological conditions that lead to NPF. The tower is installed at the National Center for Intensive Observation of severe weather (NCIO) at a southern coastal rural town of Boseong, Korea (34.76N, 127.16E) and is equipped with measurement platforms at 11 altitudes. Aerosol number concentration and size distribution will be measured at 300 m and 10 m altitudes. A complementary aerosol number concentration measurement will also be made at an intermediate altitude. The basic meteorological variables (e.g., air temperature, relative humidity, wind direction and speed) measured at each of the 11 measurement platform altitudes of the tower will be jointly collected. Comprehensive analysis of these continuous and vertically aligned measurement data will give us an opportunity to look at the details of NPF mechanism.

  16. 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

  17. 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 the 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.

  18. The response of a 300 micron silicon detector to monoenergetic neutrons determined by the use of the Monte Carlo technique

    NASA Technical Reports Server (NTRS)

    Tahezadeh, M.; Anno, G.

    1972-01-01

    The response of a 300 micron thick silicon detector to an incident monoenergetic neutron beam is evaluated by the Monte Carlo method for the cases of both a shielded and a bare detector. The result of Monte Carlo calculation, using elastic, inelastic, and absorption reactions indicates that the response of the silicon detector to neutrons is basically due to the elastic scattering. In addition, the gamma rays generated in the shield of the detector will result in a response which is 3 or 4 orders of magnitude smaller than response to incident photons. The response of a bare silicon detector is calculated for neutron energies up to 6 MeV and bias energies from 50 to 250 KeV. It is found that the maximum response for a 300 micron thick silicon detector is less than .004 c/n within this selected neutron and bias energy range. When the pulse height defect is introduced in the calculation the results at low energy neutrons were reduced.

  19. 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.

  20. Performance of a 14-T CuNb/Nb3Sn Rutherford coil with a 300 mm wide cold bore

    NASA Astrophysics Data System (ADS)

    Oguro, Hidetoshi; Watanabe, Kazuo; Awaji, Satoshi; Hanai, Satoshi; Ioka, Shigeru; Sugimoto, Masahiro; Tsubouchi, Hirokazu

    2016-08-01

    A large-bore 14-T CuNb/Nb3Sn Rutherford coil was developed for a 25 T cryogen-free superconducting magnet. The magnet consisted of a low-temperature superconducting (LTS) magnet of NbTi and Nb3Sn Rutherford coils, and a high-temperature superconducting magnet. The Nb3Sn Rutherford coil was fabricated by the react-and-wind method for the first time. The LTS magnet reached the designed operation current of 854 A without a training quench at a 1 h ramp rate. The central magnetic field generated by the LTS magnet was measured by a Hall sensor to be 14.0 T at 854 A in a 300 mm cold bore.

  1. 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.

  2. 76 FR 62673 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... during scheduled maintenance checks by operators of A300B4 and A300-600 type aeroplanes on which the... INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM-116, Transport Airplane... November 3, 2010, we issued AD 2010-23-26, Amendment 39-16516 (75 FR 74610, December 1, 2010). That...

  3. 77 FR 26937 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-08

    ... FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM-116, Transport... cracks were discovered during scheduled maintenance checks by operators of A300B4 and A300-600 type... EASA AD 2008-0111 and required operators to comply with the new inspection programme introduced...

  4. 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.

  5. CFD investigation on the flow and combustion in a 300 MWe tangentially fired pulverized-coal furnace

    NASA Astrophysics Data System (ADS)

    Khaldi, Nawel; Chouari, Yoldoss; Mhiri, Hatem; Bournot, Philippe

    2016-09-01

    The characteristics of the flow, combustion and temperature in a 300 MWe tangentially fired pulverized-coal furnace are numerically studied using computational fluid dynamics. The mathematical model is based on a Eulerian description for the continuum phase and a Lagrangian description for coal particles. The combustion reaction scheme was modeled using eddy dissipation concept. The application of a proper turbulence model is mandatory to generate accurate predictions of flow and heat transfer during combustion. The current work presents a comparative study to identify the suitable turbulence model for tangentially fired furnace problem. Three turbulence models including the standard k-ɛ model, the RNG k-ɛ model and the Reynolds Stress model, RSM are examined. The predictions are compared with the published experimental data of Zheng et al. (Proc Combust Inst 29: 811-818, 2002). The RNG k-ɛ model proves to be the most suitable turbulence model, offering a satisfactory prediction of the velocity, temperature and species fields. The detailed results presented in this paper may enhance the understanding of complex flow patterns and combustion processes in tangentially fired pulverized-coal furnaces.

  6. "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.

  7. Construction of a transcription map of a 300 kb region around the human G6PD locus by direct cDNA selection.

    PubMed

    Sedlacek, Z; Korn, B; Konecki, D S; Siebenhaar, R; Coy, J F; Kioschis, P; Poustka, A

    1993-11-01

    A transcription map covering a 300 kb region around the G6PD gene in the human Xq28 region was constructed by the direct cDNA selection method and the analysis of the resulting region-specific enriched cDNA sublibrary. Seven new genes and two loci of endogenous retrovirus HERV-K were identified. The distribution of the genes across the region is strongly non-uniform and follows the non-uniform distribution of GpG islands in the area. While one of the novel genes was found to be highly homologous to bovine smg p25A GDP-dissociation inhibitor, the remaining genes did not detect any homology to known genes. The analysis of region-specific cDNA sublibraries represents a simple, rapid and efficient tool for the generation of a regional transcription map.

  8. Combustion characteristics and NOx emissions of two kinds of swirl burners in a 300-MWe wall-fired pulverized-coal utility boiler

    SciTech Connect

    Li, Z.Q.; Jing, J.P.; Chen, Z.C.; Ren, F.; Xu, B.; Wei, H.D.; Ge, Z.H.

    2008-07-01

    Measurements were performed in a 300-MWe wall-fired pulverized-coal utility boiler. Enhanced ignition-dual register (EI-DR) burners and centrally fuel rich (CFR) swirl coal combustion burners were installed in the bottom row of the furnace during experiments. Local mean concentrations of O{sub 2}, CO, CO{sub 2} and NOx gas species, gas temperatures, and char burnout were determined in the region of the two types of burners. For centrally fuel rich swirl coal combustion burners, local mean CO concentrations, gas temperatures and the temperature gradient are higher and mean concentrations of O{sub 2} and NOx along the jet flow direction in the burner region are lower than for the enhanced ignition-dual register burners. Moreover, the mean O{sub 2} concentration is higher and the gas temperature and mean CO concentration are lower in the side wall region. For centrally fuel rich swirl coal combustion burners in the bottom row, the combustion efficiency of the boiler increases from 96.73% to 97.09%, and NOx emission decreases from 411.5 to 355 ppm at 6% O{sub 2} compared to enhanced ignition-dual register burners and the boiler operates stably at 110 MWe without auxiliary fuel oil.

  9. Spectral response of the energy-binning Dosepix ASIC coupled to a 300 μm silicon sensor under high fluxes of synchrotron radiation

    NASA Astrophysics Data System (ADS)

    Fröjdh, E.; Bisello, F.; Campbell, M.; Damet, J.; Hamann, E.; Koenig, T.; Wong, W. S.; Zuber, M.

    2015-12-01

    The Dosepix hybrid pixel detector was designed for dosimetry and radiation monitoring applications. It has three programmable modes of operation: photon counting mode, energy integration mode, and dosimetry mode. The dosimetry mode measures the energy of individual X-ray photons and automatically sorts events into pre-defined energy bins. The output is a histogram representing the measured X-ray energy spectrum, permitting a dose reconstruction that accounts for the attenuation of photons at each energy bin. This presents a potential radiation protection and dosimetry instrument in medical radiodiagnostic practices, including high flux systems such as computed tomography (CT). In this paper, we characterise the Dosepix chip by investigating the energy response and count rate capabilities when coupled to a 300 μm silicon sensor under high fluxes of monochromatic synchrotron radiation. Under nominal settings, the Dosepix detector can detect photons down to 3.5 keV, with an energy resolution of 16.5% FWHM for 8.5 keV photons and 8% FWHM for 40 keV photons. The chip can count up to 1.67 Mcps/mm2 of 40 keV photons whilst maintaining linear counting behaviour. This count rate range can be further increased by changing the programmable operating settings of the detector, making it suitable for a range of photon dosimetry applications.

  10. Coastal fog prediction with a coupled model (1D+3D) system using the data from a 300 m met tower as input

    NASA Astrophysics Data System (ADS)

    Kim, W.; Yum, S. S.

    2015-12-01

    Visibility degradation due to fog can be very hazardous both to ground transportation and aviation traffic. However, prediction of fog using numerical models is difficult because fog formation is usually determined by local meteorological conditions that are hard to be measured and modeled with sufficient resolution. For this reason, there have been several attempts to build a coupled system of a fine resolution 1D model and a 3D mesoscale model with a usual grid resolution. In this study we uses the coupled system of the 1D PAFOG model and the 3D WRF model to simulate fogs formed at a southern coastal region of Korea, where the National Center for Intensive Observation of Severe Weather (NCIO) is located. Unique to NCIO is that it has a 300 m meteorological tower on which some basic meteorological variables (temperature, dew point temperature and winds) are measured at eleven different altitudes. In addition comprehensive cloud physics measurements are made with various remote sensing instruments such as cloud radar, wind profiler, microwave radiometer, micro rain radar. Several fog cases are identified during 2015 and will be simulated by the coupled system. The comprehensive set of measurement data from NCIO will be utilized as input to the model system and for evaluating the results. Particularly the data for initial and boundary conditions, which are tightly connected to the coupled model predictability, are extracted from the tower measurement. Furthermore, various sensitivity experiments will be done to enhance our understanding of the coastal fog formation mechanism. Detailed results will be discussed at the conference.

  11. Baseline Assessment of the Use of Weather Information in Airline Systems Operations Centers

    DTIC Science & Technology

    2012-08-01

    Wsi .--------------Weather.services.international vii ExECUTIvE sUmmAry approximately. 70.%. of. national. airspace. system. (nas...Products Coordinator Manager 4 dispatchers 604 Boeing 777 757 737-800 MD 82/83 A300/600 13,650 4.5h /1h /16h Worldwide Sabre WSI ...Pilotbrief EAG WSI Fusion NEXRAD, Convective SIGMETs, AIRMETs NOAA weather Center Java Tool International Senior Meteorologist

  12. Haitian Retention: A 310 Teacher Training Project, 1986-1987.

    ERIC Educational Resources Information Center

    Flanagan, Brian; Lucas, Nell

    The Haitian Retention Program (HRP) is designed to help illiterate and unskilled Haitian immigrants to Palm Beach County (Florida) learn the English language through regular class attendance. Although many Haitians are enthusiastic about enrolling in adult English for Speakers of Other Languages (ESOL) classes, they are not accustomed to attending…

  13. The Path to a $300-Million Donation

    ERIC Educational Resources Information Center

    Masterson, Kathryn

    2008-01-01

    The first time Edward A. Snyder, dean of the University of Chicago's graduate business school, asked David G. Booth to donate money to name something on the campus, Mr. Booth said no. Five years later, the University's Graduate School of Business is named the University of Chicago Booth School of Business, after Mr. Booth gave what is valued as a…

  14. 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

    ...]racks * * * in sections 13 to 18 of the fuselage between rivets of longitudinal lap joints between... to 18 of the fuselage between rivets of longitudinal lap joints between frames 18 and 80 which could... in order to prevent cracks development in sections 13 to 18 of the fuselage between rivets...

  15. 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

    ... fuselage between rivets of longitudinal lap joints between frames 18 and 80 which could affect the... fuselage between rivets of longitudinal lap joints between frames 18 and 80 which could affect the... prevent cracks development in sections 13 to 18 of the fuselage between rivets of longitudinal lap...

  16. 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.

  17. Load-control of a 300 hp tunnelling machine

    NASA Astrophysics Data System (ADS)

    Edwards, J. B.

    1983-04-01

    A mathematical model is derived for the rock cutting operation of a tunnelling machine used in a coal mine. The existing over-riding load control system is shown to produce oscillatory load patterns when cutting harder rock, that accord closely with preliminary observations underground. The model is used to design and confirm the performance of a load control system using derivative power feedback. Modifications to the existing control amplifier are straightforward.

  18. A 300-nm compact mm-wave linac FEL design

    SciTech Connect

    Nassiri, A.; Kustom, R.L.; Kang, Y.W.

    1995-12-31

    Microfabrication technology offers an alternative method for fabricating precision, miniature-size components suitable for use in accelerator physics and commercial applications. The original R&D work at Argonne, in collaboration with the University of Illinois at Chicago, has produced encouraging results in the area of rf accelerating structure design, optical and x-ray masks production, deep x-ray lithography (LIGA exposures), and precision structural alignments. In this paper we will present a design study for a compact single pass mm-linac FEL to produce short wavelength radiation. This system will consists of a photocathode rf gun operated at 30 GHz, a 50-MeV superconducting constant gradient structure operated at 60 GHz, and a microundulator with 1-mm period. Initial experimental results on a scale model rf gun and microundulator will be presented.

  19. 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.

  20. 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".

  1. 76 FR 27227 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ... Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT...-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057-3356... airplane configuration: Cold working of trellis boom drainage holes. Repetitive detailed or rotating...

  2. 75 FR 66659 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-29

    ... associated with a structural fatigue phenomenon of the rear spar internal angle and the tee fitting located...-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98055-4056... programme is necessary to detect and prevent damage associated with a structural fatigue phenomenon of...

  3. 75 FR 39863 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-13

    ... programme is necessary to detect and prevent damage associated with a structural fatigue phenomenon of the... referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton... INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM-116, FAA, Transport...

  4. Sing and Learn English. A 310 Special Demonstration Project. 1984-1985.

    ERIC Educational Resources Information Center

    Rio Salado Community Coll., AZ.

    This instructor's guide contains the words to 23 popular songs along with guidelines and activities designed to help English-as-a-second-language (ESL) students improve their English skills while learning the songs. Each song is accompanied by a brief paraphrase of the content of the song, vocabulary and grammar exercises, and suggested teacher's…

  5. 76 FR 27220 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ... structural integrity of the wings. We are issuing this AD to require actions to correct the unsafe condition... (SBs which address structure fatigue related areas on the wing parts), until now part of the... wings. The required corrective actions are as follows, depending on airplane configuration: For...

  6. 76 FR 62653 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. This proposed AD results from mandatory continuing... fuel tank explosion. * * * * * The proposed AD would require actions that are intended to address...

  7. The Georgia Express: Final Report. A 310 Planning Project for Adult Education.

    ERIC Educational Resources Information Center

    Griffin City - Spalding County Board of Education, GA.

    This report summarizes the work of the Georgia Express project staff and the five task teams that provided research services to the Georgia Task Force on Adult Education. (The purpose of the Task Force was to review Georgia Adult Education's current goals, objectives, and procedures and to make recommendations for program improvement.) The report…

  8. 76 FR 65938 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-25

    ... the U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12... the compliance times specified, unless the actions have already been done. Resistance Measurement (g.... 02 September 3, 2007. (1) For configuration 05 airplanes: Do a resistance check of the inboard...

  9. 76 FR 34 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ...We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition...

  10. 75 FR 57880 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-23

    ...) extension work, Airbus discovered that the splined couplings and the sliding bearings of the flap... Goal (DSG) extension work, Airbus discovered that the splined couplings and the sliding bearings of the... that the splined couplings and the sliding bearings of the flap transmission system could be...

  11. 76 FR 421 - Airworthiness Directives; Airbus Model A310 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-05

    ... that the splined couplings and the sliding bearings of the flap transmission system could be affected... aircraft Design Service Goal (DSG) extension work, Airbus discovered that the splined couplings and the... aircraft Design Service Goal (DSG) extension work, Airbus discovered that the splined couplings and...

  12. Bioinspired nanodevice based on the folic acid/titanium dioxide system.

    PubMed

    Gaweda, Sylwia; Stochel, Grazyna; Szaciłowski, Konrad

    2007-05-04

    A new bioinspired nanomaterial has been obtained by chemisorption of folic acid onto nanocrystalline titanium dioxide. The organic chromophore is linked with the semiconductor surface via the glutamate chain and anchored with the carboxylate group. The geometry and electronic structure of the chromophore was studied in detail with DFT. Photoelectrochemical studies revealed photosensitization of the new material towards visible light. The photoelectrodes composed of the folic acid/titanium dioxide hybrid material generated photocurrent over a 300-600-nm window. Moreover, the direction of the photocurrent could be changed from anodic to cathodic and vice versa by application of the appropriate photoelectrode potential. Photoelectrochemical and spectroscopic studies allowed the elucidation of the mechanism of photocurrent switching. Photoelectrodes composed of folate-modified titanium dioxide may serve as a simple model of optoelectronic switches and may constitute the basis for molecular photoelectronic devices.

  13. 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.

  14. 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.

  15. 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.

  16. 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.

  17. Atmospheric CO2 Enrichment of Water Hyacinths: Effects on Transpiration and Water Use Efficiency

    NASA Astrophysics Data System (ADS)

    Idso, Sherwood B.; Kimball, Bruce A.; Anderson, Michael G.

    1985-11-01

    Open-top clear plastic wall chambers enclosing pairs of sunken metal stock tanks, one of each pair of which contained a full cover of water hyacinths, were maintained out-of-doors at Phoenix, Arizona for several weeks during the summer of 1984. One of these chambers represented ambient conditions, while the other three were continuously enriched with carbon dioxide to approximate target concentrations of 500, 650, and 900 ppm. During a 4-week period when plant growth was at its maximum, water hyacinth biomass production increased by 36% for a 300-600 ppm doubling of the atmospheric CO2 content, while water use efficiency, or the biomass produced per unit of water transpired, actually doubled. These results are similar to what has been observed in several terrestrial plants and they indicate the general trend which may be expected to occur as atmospheric CO2 continues to rise in the years ahead.

  18. 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

    ...: Hamilton Sundstrand (HS), the manufacturer of the RAT [ram air turbine], reported the failure during a wind... fastening screw on the RAT turbine cover during a wind tunnel test. After investigation, it has been discovered that a batch of screws, used to attach the balance washers of the RAT Turbine assembly, has...

  19. 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 has been discovered that a batch of screws, used to attach the balance washers of the RAT...

  20. 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

    ... routine inspection, the Right Hand frame 40 forward fitting between stringer 32 and stringer 33 was found... structural integrity of the frame. * * * * * We are issuing this AD to require actions to correct the unsafe... Right Hand frame 40 forward fitting between stringer 32 and stringer 33 was found cracked. The...

  1. 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

    ... Register on February 25, 2010 (75 FR 8549). That NPRM proposed to correct an unsafe condition for the... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a...

  2. 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

    ... reinforcement of the junction of frame bases at FR48, FR49 and FR51 to FR53 is necessary to enable the aircraft... (42 500 FC ), it has been concluded that a reinforcement of the junction of frame bases at FR48, FR49... above, this AD requires the reinforcement of the affected junction of frame bases. Required...

  3. 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

    ... a reinforcement of the junction of frame bases at FR48, FR49 and FR51 to FR53 is necessary to enable... (42,500 FC ), it has been concluded that a reinforcement of the junction of frame bases at FR48, FR49... above, this AD requires the reinforcement of the affected junction of frame bases. Required...

  4. 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

    ... situation, if not corrected, can cause hydraulic system functional degradation, possibly resulting in... type design specifications. This situation, if not corrected, can cause hydraulic system functional... conditioning system was contaminated with hydraulic mist. The leakage of the check valves was caused by...

  5. 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

    ...-2074, Revision 04, dated October 24, 2008. (A) If cracking is found and the radius of the rework is... of the rework is 20.0 mm (0.787 inch) or more, before further flight, repair in accordance with a... radius of the rework is 20.0 mm (0.787 inch) or more. Paragraph (g)(3)(i)(B) of this AD requires...

  6. 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...

  7. 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...

  8. 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...

  9. 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...

  10. 15 CFR 8a.225 - Educational institutions eligible to submit transition plans.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 15 Commerce and Foreign Trade 1 2014-01-01 2014-01-01 false Educational institutions eligible to... FINANCIAL ASSISTANCE Coverage § 8a.225 Educational institutions eligible to submit transition plans. (a) Application. This section applies to each educational institution to which §§ 8a.300 through 8a.310 apply...

  11. 15 CFR 8a.225 - Educational institutions eligible to submit transition plans.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 15 Commerce and Foreign Trade 1 2013-01-01 2013-01-01 false Educational institutions eligible to... FINANCIAL ASSISTANCE Coverage § 8a.225 Educational institutions eligible to submit transition plans. (a) Application. This section applies to each educational institution to which §§ 8a.300 through 8a.310 apply...

  12. 15 CFR 8a.225 - Educational institutions eligible to submit transition plans.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 15 Commerce and Foreign Trade 1 2011-01-01 2011-01-01 false Educational institutions eligible to... FINANCIAL ASSISTANCE Coverage § 8a.225 Educational institutions eligible to submit transition plans. (a) Application. This section applies to each educational institution to which §§ 8a.300 through 8a.310 apply...

  13. 15 CFR 8a.225 - Educational institutions eligible to submit transition plans.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 15 Commerce and Foreign Trade 1 2012-01-01 2012-01-01 false Educational institutions eligible to... FINANCIAL ASSISTANCE Coverage § 8a.225 Educational institutions eligible to submit transition plans. (a) Application. This section applies to each educational institution to which §§ 8a.300 through 8a.310 apply...

  14. 15 CFR 8a.225 - Educational institutions eligible to submit transition plans.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Educational institutions eligible to... FINANCIAL ASSISTANCE Coverage § 8a.225 Educational institutions eligible to submit transition plans. (a) Application. This section applies to each educational institution to which §§ 8a.300 through 8a.310 apply...

  15. 75 FR 75870 - Airworthiness Directives; Airbus Model A300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-07

    ... failure. Following the design intent, engagement of the SLP leads to jam the THSA, indicating the failure... demonstrated that, when the SLP is engaged, it does not systematically jam the THSA. In ] addition, laboratory..., engagement of the SLP leads to jam the THSA, indicating the failure of the PLP. Tests carried out under...

  16. 75 FR 52652 - Airworthiness Directives; Airbus Model A300 Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-27

    ... jam the THSA, indicating the failure of the PLP. Tests carried out under the loads-measured during representative flights have demonstrated that, when the SLP is engaged, it does not systematically jam the THSA... case of PLP failure. Following the design intent, engagement of the SLP leads to jam the...

  17. 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.

  18. 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.

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

    DTIC Science & Technology

    1985-03-01

    EFFICIENCY IS A FUNCION OF MOTOR OUTPUT SPEED AND APPLIED TORQUE AT VARIOUS ENGINE 49 INPUT SPEEDS ........ .............................. 70 FIGURE...given as Desired Temporary Total Temporary Total Engine Hig equired (High \\/kequiredSpeed = 1100 rpm + (.3666) Motor) (84) Engine) (.00l85) MotorA Engine...driver of component or system failures. An additional constraint is that the system would be designed in such a manner that would allow manual

  20. High Energy IED measurements with MEMs based Si grid technology inside a 300mm Si wafer

    NASA Astrophysics Data System (ADS)

    Funk, Merritt

    2012-10-01

    The measurement of ion energy at the wafer surface for commercial equipment and process development without extensive modification of the reactor geometry has been an industry challenge. High energy, wide frequency range, process gases tolerant, contamination free and accurate ion energy measurements are the base requirements. In this work we will report on the complete system developed to achieve the base requirements. The system includes: a reusable silicon ion energy analyzer (IEA) wafer, signal feed through, RF confinement, and high voltage measurement and control. The IEA wafer design required carful understanding of the relationships between the plasma Debye length, the number of grids, intergrid charge exchange (spacing), capacitive coupling, materials, and dielectric flash over constraints. RF confinement with measurement transparency was addressed so as not to disturb the chamber plasma, wafer sheath and DC self-bias as well as to achieve spectral accuracy The experimental results were collected using a commercial parallel plate etcher powered by a dual frequency (VHF + LF). Modeling and Simulations also confirmed the details captured in the IED.

  1. A 300-year history of Pacific Northwest windstorms inferred from tree rings

    NASA Astrophysics Data System (ADS)

    Knapp, Paul A.; Hadley, Keith S.

    2012-07-01

    Hurricane-force winds are frequently allied with mid-latitude cyclones yet little is known about their historical timing and geographic extent over multiple centuries. This research addresses these issues by extending the historical record of major mid-latitude windstorms along North America's Pacific Northwest (PNW) coast using tree-ring data collected from old-growth (> 350 years), wind-snapped trees sampled at seven coastal sites in Oregon, USA. Our objectives were to: 1) characterize historical windstorm regimes; 2) determine the relationship between high-wind events (HWEs) and phases of the PDO, ENSO and NPI; and 3) test the hypothesis that PNW HWEs have migrated northward. We based our study on the identification of tree-growth anomalies resulting from windstorm-induced canopy changes corresponding to documented (1880-2003) and projected HWEs (1701-1880). Our methods identified all major windstorm events recorded since the late 1800s and confirmed that variations in coastal tree-growth are weakly related to temperature, precipitation, and drought, but are significantly related to peak wind speeds. These results suggest wind-induced changes in canopy conditions control tree growth at all sites. Comparisons between the tree-ring record and the PDO, NPI, and ENSO revealed a significant positive correlation between HWEs and neutral to warm PDO conditions and a slightly weaker correlation with the NPI. ENSO events were not significantly related to the occurrence of HWEs. Latitudinal groupings of our sites revealed a gradual and non-significant northerly shift of HWEs until the late 19th century followed by a significant northward shift during the past 120 years. These results mark the application of dendroanemology as a method for characterizing windstorm regimes for multiple centuries.

  2. 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.

  3. Performance results of a 300-deg linear phase modulator for spaceborne communications applications

    NASA Technical Reports Server (NTRS)

    Mysoor, Narayan R.; Mueller, Robert O.

    1993-01-01

    A phase modulator capable of large linear phase deviation, low loss, and wide band operation with good thermal stability was developed for deep space spacecraft transponder (DST) applications at X-band (8.415 GHz) and Ka-band (32 GHz) downlinks. The design uses a two-stage circulator-coupled reflection phase shifter with constant gamma hyperabrupt varactors and an efficient modulator driver circuit to obtain a phase deviation of +/- 2.5 rad with better than 8 percent linearity. The measured insertion loss is 6.6 dB +/- 0.35 dB at 8415 MHz. Measured carrier and relative sideband amplitudes resulting from phase modulation by sine wave and square modulating functions agree well with the predicted results.

  4. Performance results of a 300-degree linear phase modulator for spaceborne communications applications

    NASA Technical Reports Server (NTRS)

    Mysoor, N. R.; Mueller, R. O.

    1993-01-01

    A phase modulator capable of large linear phase deviation, low loss, and wide band operation with good thermal stability was developed for deep space spacecraft transponder (DST) applications at X-band (8.415 GHz) and Ka-band (32 GHz) downlinks. The design uses a two-stage circulator-coupled reflection phase shifter with constant gamma hyperabrupt varactors and an efficient modulator driver circuit to obtain a phase deviation of +/-2.5 rad with better than 8 percent linearity. The measured insertion loss is 6.6 dB +/- 0.35 dB at 8415 MHz. Measured carrier and relative sideband amplitudes resulting from phase modulation by sine wave and square modulating functions agree well with the predicted results.

  5. 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.

  6. Early evolution of limb regeneration in tetrapods: evidence from a 300-million-year-old amphibian.

    PubMed

    Fröbisch, Nadia B; Bickelmann, Constanze; Witzmann, Florian

    2014-11-07

    Salamanders are the only tetrapods capable of fully regenerating their limbs throughout their entire lives. Much data on the underlying molecular mechanisms of limb regeneration have been gathered in recent years allowing for new comparative studies between salamanders and other tetrapods that lack this unique regenerative potential. By contrast, the evolution of animal regeneration just recently shifted back into focus, despite being highly relevant for research designs aiming to unravel the factors allowing for limb regeneration. We show that the 300-million-year-old temnospondyl amphibian Micromelerpeton, a distant relative of modern amphibians, was already capable of regenerating its limbs. A number of exceptionally well-preserved specimens from fossil deposits show a unique pattern and combination of abnormalities in their limbs that is distinctive of irregular regenerative activity in modern salamanders and does not occur as variants of normal limb development. This demonstrates that the capacity to regenerate limbs is not a derived feature of modern salamanders, but may be an ancient feature of non-amniote tetrapods and possibly even shared by all bony fish. The finding provides a new framework for understanding the evolution of regenerative capacity of paired appendages in vertebrates in the search for conserved versus derived molecular mechanisms of limb regeneration.

  7. 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.

  8. Skull and brain of a 300-million-year-old chimaeroid fish revealed by synchrotron holotomography

    PubMed Central

    Pradel, Alan; Langer, Max; Maisey, John G.; Geffard-Kuriyama, Didier; Cloetens, Peter; Janvier, Philippe; Tafforeau, Paul

    2009-01-01

    Living cartilaginous fishes, or chondrichthyans, include numerous elasmobranch (sharks and rays) species but only few chimaeroid (ratfish) species. The early history of chimaeroids, or holocephalans, and the modalities of their divergence from elasmobranchs are much debated. During Carboniferous times, 358–300 million years (Myr) ago, they underwent a remarkable evolutionary radiation, with some odd and poorly understood forms, including the enigmatic iniopterygians that were known until now from poorly informative flattened impressions. Here, we report iniopterygian skulls found preserved in 3 dimensions in ≈300-Myr-old concretions from Oklahoma and Kansas. The study was performed by using conventional X-ray microtomography (μCT), as well as absorption-based synchrotron microtomography (SR-μCT) [Tafforeau P, et al. (2006) Applications of X-ray synchrotron microtomography for non-destructive 3D studies of paleontological specimens. Appl Phys A 83:95–202] and a new holotomographic approach [Guigay P, Langer M, Boistel R, Cloetens P (2007) Mixed transfer function and transport of intensity approach for phase retrieval in the Fresnel region. Opt Lett 32:1617–1619], which revealed their peculiar anatomy. Iniopterygians also share unique characters with living chimaeroids, suggesting that the key chimaeroid skull features were already established 300 Myr ago. Moreover, SR-μCT of an articulated skull revealed a strikingly brain-shaped structure inside the endocranial cavity, which seems to be an exceptional case of soft-tissue mineralization of the brain, presumably as a result of microbially induced postmortem phosphatization. This was imaged with exceptional accuracy by using holotomography, which demonstrates its great potential to image preserved soft parts in dense fossils. PMID:19273859

  9. 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. P.

    1990-01-01

    Optical interconnects are being considered for the high speed distribution of multiplexed control signals in GaAs MMIC-based phased array antennas. This paper describes the performance of a hybrid GaAs optoelectronic integrated circuit (OEIC), along with a description of 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 305 Mbps. The performance characteristics as well as potential applications of the device are presented.

  10. 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…

  11. Building Self-Esteem and Confidence of Substance Abusers through Adult Basic Education. A 310 Special Demonstration Report. September 1, 1986 to June 30, 1987.

    ERIC Educational Resources Information Center

    Erie City School District, PA.

    A project was conducted at Crossroads Drug and Alcohol Rehabilitation Center (Erie, Pennsylvania) to help residents build self-esteem and confidence through a course involving decision making, problem solving, and values clarification. Strategies, academic skills, reading, writing, and mathematics were introduced as part of the program. Over the…

  12. 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…

  13. A 300-parsec-long jet-inflated bubble around a powerful microquasar in the galaxy NGC 7793.

    PubMed

    Pakull, Manfred W; Soria, Roberto; Motch, Christian

    2010-07-08

    Black-hole accretion states near or above the Eddington luminosity (the point at which radiation force outwards overcomes gravity) are still poorly known because of the rarity of such sources. Ultraluminous X-ray sources are the most luminous class of black hole (L(X) approximately 10(40) erg s(-1)) located outside the nuclei of active galaxies. They are likely to be accreting at super-Eddington rates, if they are powered by black holes with masses less than 100 solar masses. They are often associated with shock-ionized nebulae, though with no evidence of collimated jets. Microquasars with steady jets are much less luminous. Here we report that the large nebula S26 (ref. 4) in the nearby galaxy NGC 7793 is powered by a black hole with a pair of collimated jets. It is similar to the famous Galactic source SS433 (ref. 5), but twice as large and a few times more powerful. We determine a mechanical power of around a few 10(40) erg s(-1). The jets therefore seem 10(4) times more energetic than the X-ray emission from the core. S26 has the structure of a Fanaroff-Riley type II (FRII-type) active galaxy: X-ray and optical core, X-ray hot spots, radio lobes and an optical and X-ray cocoon. It is a microquasar where most of the jet power is dissipated in thermal particles in the lobes rather than relativistic electrons.

  14. Facies and diagenesis of upper Tertiary-Pleistocene platform carbonates in a 300m borehole, southern Ambergris Caye, Belize

    SciTech Connect

    Burtnett, C.A. )

    1996-01-01

    Well cuttings from an [approx]300 m-deep borehole drilled by the Belize government on Ambergris Caye were examined for inferred depositional environments, mineralogy, and stable oxygen-carbon isotopic compositions. The recovered section composes carbonates of the Barton Creek and ( )Sand Hill Formations, presumably of upper-most Tertiary to Pleistocene age. Location of the wellbore to the west of the exposed Pleistocene and superposed Holocene platform margin reef suggests continuous platform deposition. Comparison to modem facies indicates that the entire section is, in fact, mostly outer-shelf reef and immediate back-reef facies. Four unconformities are recognized in the upper 150 m of section on the basis of microbreccias and calcretes, and they truncate stacked, shallowing-upward cycles within the section. Depleted [delta][sup 18]O and [delta][sup 13]C compositions of whole-rock samples from the upper 150 m, which are highly porous and LMC-dominated, range from -2.5 to -5 [per thousand] and -3 to -7 [per thousand] (PDB), respectively. Unconformities are therefore believed to be subaerial exposure surfaces. Dolomite (replacive and cement) occurs below 150 m within HMC-dominated limestones that also contain aragonite. Dolomite generally increases with depth from 8-28%, its composition varies from Ca[sub 51-57], and its mean isotopic composition is [delta][sup 18]O = 3.2 [per thousand] and [delta][sup 13]C = 2.5 o/oo. There are no depth-related trends in dolomite stoichiometry or isotopic composition. Although the timing and site of dolomitization are not known, available data suggest formation from circulating marine fluids of near-normal composition.

  15. Facies and diagenesis of upper Tertiary-Pleistocene platform carbonates in a 300m borehole, southern Ambergris Caye, Belize

    SciTech Connect

    Burtnett, C.A.

    1996-12-31

    Well cuttings from an {approx}300 m-deep borehole drilled by the Belize government on Ambergris Caye were examined for inferred depositional environments, mineralogy, and stable oxygen-carbon isotopic compositions. The recovered section composes carbonates of the Barton Creek and (?)Sand Hill Formations, presumably of upper-most Tertiary to Pleistocene age. Location of the wellbore to the west of the exposed Pleistocene and superposed Holocene platform margin reef suggests continuous platform deposition. Comparison to modem facies indicates that the entire section is, in fact, mostly outer-shelf reef and immediate back-reef facies. Four unconformities are recognized in the upper 150 m of section on the basis of microbreccias and calcretes, and they truncate stacked, shallowing-upward cycles within the section. Depleted {delta}{sup 18}O and {delta}{sup 13}C compositions of whole-rock samples from the upper 150 m, which are highly porous and LMC-dominated, range from -2.5 to -5 {per_thousand} and -3 to -7 {per_thousand} (PDB), respectively. Unconformities are therefore believed to be subaerial exposure surfaces. Dolomite (replacive and cement) occurs below 150 m within HMC-dominated limestones that also contain aragonite. Dolomite generally increases with depth from 8-28%, its composition varies from Ca{sub 51-57}, and its mean isotopic composition is {delta}{sup 18}O = 3.2 {per_thousand} and {delta}{sup 13}C = 2.5 o/oo. There are no depth-related trends in dolomite stoichiometry or isotopic composition. Although the timing and site of dolomitization are not known, available data suggest formation from circulating marine fluids of near-normal composition.

  16. 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.

  17. 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.

  18. 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.

  19. Area Equivalent Method VISICALC (trade name).

    DTIC Science & Technology

    1984-02-01

    84-8Q 4. Ttie and Subtitle S. Report Date AreaEquvalnt etho onVISC~CFebruary 1984 AreaEquvalet Mtho on ISIALC6. Perform’ 0 gs ,io Cede...9965 A300 .056243 .70843 . 9973 .065947 .40001 .9676 767 .045582 .73509 .9994 .029423 .51749 .9843 A310 .049037 .70737 .9975 .033022 .4913 .9897 BC111...023937 .69715 .9941 737 .17448 .68081 . 9973 .02582 .7414 .9974 DC950 .54058 .58632 .9992 .094585 .6713 .9977 737017 .47652 .58646 .999 .058649 .7154

  20. 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

    ...; equipped with carbon fiber reinforced plastic rudders having part numbers and serial numbers listed in... flight cycles, but not fewer than 4,000 flight cycles from the last inspection. (4) In other locations... AD at intervals not to exceed 4,500 flight cycles until permanent restoration is completed. (10)...

  1. 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

    ..., -304, -322, -324, and -325 airplanes; certificated in any category; equipped with carbon fiber... inspection required by paragraph (g)(3) of this AD two times at intervals not to exceed 4,500 flight cycles, but not fewer than 4,000 flight cycles from the most recent inspection. (h) For rudders identified...

  2. A 300 Year Surge History of the Drangajökull Ice Cap, Northwest Iceland: Surge Frequency and Little Ice Age Maximum

    NASA Astrophysics Data System (ADS)

    Brynjolfsson, S.; Schomacker, A.; Ingolfsson, O.; Gudmundsdottir, E. R.

    2014-12-01

    Over the last 300 years, each of the three surge-type outlet glaciers of the Drangajökull ice cap in north-west Iceland has surged 2-4 times. There is valuable historical information available on the surge frequencies since the Little Ice Age (LIA) maximum because of the proximity of the surging outlets, Reykjarfjarðarjökull, Leirufjarðarjökull and Kaldalónsjökull to farms and pastures. We have reconstructed the surge history of the Drangajökull ice cap, based on geomorphological mapping, sedimentary studies and review of historical records. Geomorphological mapping of the glacier forefields revealed twice as many end-moraines than previously recognized. This indicates a higher surge frequency than previously perceived. A clear relationship between the surge frequency and climate cannot be established, however, surges were more frequent during the 19th century and the earliest 20th century compared to the cool 18th century and the warmer late part of the 20th century. We have estimated the magnitude of the LIA maximum surge events by reconstruction of Digital Elevation Models (DEMs) that can be compared with modern DEMs. As reference points for the digital elevation modelling we used the recently mapped lateral moraines and historical information on the exposure timing of nunataks. During the LIA maximum surge events the outlet glaciers extended 3-3.5 km further down-valley than at present. Their ice volumes were at least 2-2.5 km3 greater than after their most recent surges in the beginning of the 21st century.

  3. 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

    ... failure can be caused by bearing migration from the upper attachment gimbal by failure or loss of a... migration from the upper attachment gimbal by failure or loss of a retention bolt. In case of failure of the... 13132. This proposed AD would not have a substantial direct effect on the States, on the...

  4. 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

    ... wiring in the wing, center, and trim fuel tanks, due to failed P-clips used for retaining the wiring and... design review against explosion risks. The replacement of some types of P-clips and ] improvement of the... 03 * * * and additional work [bonding the fuel jettison system-- blanking plates] on the wing...

  5. 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

    ... to the National Aviation Authorities (NAA). Under this regulation, all holders of type certificates for passenger transport aircraft * * * are required to conduct a design review against explosion risks..., installed through the wing panel needed to be protected to prevent possible damage in case of chafing...

  6. 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

    ... holders of type certificates for passenger transport aircraft with either a passenger capacity of 30 or... to the National Aviation Authorities (NAA). Under this regulation, all holders of type certificates for passenger transport aircraft * * * are required to conduct a design review against explosion...

  7. 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

    ...We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition...

  8. 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

    ... Illustrated Parts Catalogue (IPC) during a maintenance phase of the Lower Aft Pylon Fairing (LAPF). This... Catalogue (IPC) during a maintenance phase of the Lower Aft Pylon Fairing (LAPF). This condition, if not... against over-length screws that had been installed in accordance with the Illustrated Parts Catalogue...

  9. 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.

  10. 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

    ... complete nose landing gear (NLG) shock absorber bolts failure were reported to the manufacturer. In both... shock absorber was not tolerant to the over- torque, and an inspection plan has been developed to track any NLG shock absorber-to-main barrel attachment bolts status. The proposed AD would require...

  11. 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

    ...: * * * * * Two cases of complete nose landing gear (NLG) shock absorber bolts failure were reported to the... design of the NLG shock absorber was not tolerant to the over-torque, and an inspection plan has been developed to track any NLG shock absorber-to-main barrel attachment bolts status. * * * * * * * * We...

  12. 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

    ... failure can be caused by bearing migration from the upper attachment gimbal by failure or loss of a...., Washington, DC. FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM... failure can be caused by bearing migration from the upper attachment gimbal by failure or loss of...

  13. Comparison of the Results of Tests on A300 Aircraft in the RAE 5 Metre and the ONERA F1 Wind Tunnels.

    DTIC Science & Technology

    1988-05-01

    7 - A5 0 lNAodeI n 5 fmVte tMtmn. CM jCL C 0m IFI CLaCD Fig. a8- Firs compee’etw meuwawton on noa in hAwio -oftio. Figs W& O CM C CL L( F156 I...r ibu t t ’ / .. - A y;ala il ( o s. _ ,Dist / Speci ll I | m mma m mmnna mua " d *’-’mmm I ni1N* 3 1 INTRODUCTION Check tests of the performance of...subscript c indicates corrected results, A the aspect ratio and k is a calculated value for the induced drag factor. The third term in the blockage

  14. Role of π -d hybridization in a 300-K organic-magnetic interface: Metal-free phthalocyanine single molecules on a bcc Fe(001) whisker

    NASA Astrophysics Data System (ADS)

    Yamada, T. K.; Yamagishi, Y.; Nakashima, S.; Kitaoka, Y.; Nakamura, K.

    2016-11-01

    The realization of single molecular electronics is considered the next frontier to addressing and sustaining the storage needs of the future. In order to realize a single molecular device working at 300 K, two conditions must be satisfied: first, there must be no molecular diffusion, i.e., robust bonding between molecules and the contacting electrode, and second, stable electronic interface states. In this study, using a combination of 7-K and 300-K ultrahigh vacuum scanning tunneling microscopy/spectroscopy experiments and theoretical ab initio calculations, we investigated the adsorption of π -conjugated metal-free phthalocyanine (Pc) single molecules onto an Fe(001) whisker single crystal along with the resulting electronic interface structures. The Pc/Fe(001) system was found to prevent molecular diffusion even at 300 K, due to strong adsorption as well as the presence of a larger diffusion barrier than that of the Pc/Ag(001) system, in which molecules are known to diffuse at 300 K. The origin of such a robust bonding was studied by recovering the sample local density of states (LDOS) with the normalized (d I /d V )/T curves, where the LDOS peaks are successfully explained by theoretical calculations.

  15. Physical and dynamical characteristics of a 300 m-deep anticyclonic eddy in the Ligurian Sea (Northwest Mediterranean Sea): Evidence from a multi-platform sampling strategy

    NASA Astrophysics Data System (ADS)

    Borrione, Ines; Falchetti, Silvia; Alvarez, Alberto

    2016-10-01

    We describe the physical and dynamical characteristics of a mesoscale anticyclonic eddy observed in August 2013 over the shelf-break region of the northeastern sector of the Ligurian Sea, between the northeastern edge of the Northern Current (NC) and the coast. Results derive from a dense dataset of temperature, salinity and current measurements obtained from a multi-platform sampling strategy as well as from a diagnostic simulation with the Regional Ocean Modeling System (ROMS) at a horizontal resolution of 1.8 km. Model results are obtained from a strong nudging to observations and, as they are physically balanced, they allow a three-dimensional diagnosis of the dynamics and physical characteristics of the eddy. The eddy is centered around 9.5°E, 43.94°N, about 20 km from the coast, and has a radius of 16 km. It is characterized by low-density waters and penetrates the thermocline down to at least 300 m reflecting the main features of the NC. Horizontal velocities near the surface are around 0.4 m s-1, while at 150 m are still significantly high and close to 0.2 m s-1. Vertical velocities were estimated from model results; absolute values are below 4 m day-1 until depths shallower than 150 m and increase with depth to 15 m day-1. The eddy's presence inverts the northwestwards flow traditionally portrayed in the region determining a southeastwards coastal circulation that replenishes coastal waters with those originating from the NC. We discuss several possible eddy formation mechanisms and suggest that its formation depends on the directionality of the NC when it enters the Ligurian Sea, as a result of the adjustment of the shear and orbital components of the current's relative vorticity.

  16. 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

    ..., -221, -222, -304, -322, -324, and -325 airplanes; certificated in any category; equipped with carbon fiber reinforced plastic rudders having any part number and serial number listed in Table 1, 2, 3, or...

  17. 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

  18. 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

  19. 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

    ... unsafe condition as: Airbus, in the frame of the Extended Service Goal (ESG) exercise, has demonstrated... proposed to correct an unsafe condition for the specified products. The MCAI states: Airbus, in the frame... substantial direct effect on the States, on the relationship between the national government and the...

  20. 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

    ... July 18, 2006 (71 FR 33994, June 13, 2006), the Director of the Federal Register approved the incorporation by reference of certain other publications listed in this AD. On April 12, 2000 (65 FR 12077... published in the Federal Register on November 18, 2009 (74 FR 59483), and proposed to supersede AD...

  1. 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

    ... to have induced excessive loads into the gear train, leading to collapse of one bearing on a shaft of...., Washington, DC. FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, International Branch, ANM... induced excessive loads into the gear train, leading to collapse of one bearing on a shaft of the...

  2. 78 FR 9359 - Order Renewing Order Temporarily Denying Export Privileges and Making That Temporary Denial of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-08

    ... has continued to evade U.S. export control laws by operating two Airbus A310 aircraft \\6\\ bearing... multiple aircraft in violation of the TDO and the Regulations. The two A310s that bear the tail numbers F... (MSN 23480) bearing the Iranian tail number EP-MNE also remains listed in active operation in...

  3. 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.

  4. 75 FR 10342 - Petition for Exemption; Summary of Petition Received

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-05

    ... flammability exemption for Model A310 airplanes. This exemption, if granted, would relieve Airbus of the requirement to develop a center fuel tank flammability or reduction means, the associated service...

  5. 77 FR 22756 - Modification of Temporary Denial Order Making Temporary Denial of Export Privileges Applicable to...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-17

    ... A310 aircraft \\3\\ that bears the livery and logo of Mahan Airways and operates on flights into and out... Gay Street, Baltimore, Maryland 21202-4022. A copy of this Order shall be sent to Mahan Air...

  6. 78 FR 28159 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-14

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes...: We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A300 series airplanes; Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F...

  7. 77 FR 36146 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ...-amplifier and MTI units. This AD also adds Model A310 series airplanes to the applicability. We are issuing... Sensor- Amplifier (FLSA) and Multi Tank Indicators (MTI) units. FLSA and MTI failures have been... sensor-amplifier and multi-tank indicator (MTI) units. We are issuing this AD to prevent degradation...

  8. 77 FR 48427 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-14

    ...-209-AD; Amendment 39-17153; AD 2012-16-06] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes... airplanes and Model A310-203, -204, - 221, and -222 airplanes. This AD was prompted by a report of a... loss of the airplane. DATES: This AD becomes effective September 18, 2012. The Director of the...

  9. Shape transformation of {hk0}-faceted Pt nanocrystals from a tetrahexahedron into a truncated ditetragonal prism.

    PubMed

    Du, Jia-Huan; Sheng, Tian; Xiao, Chi; Tian, Na; Xiao, Jing; Xie, Ai-Yun; Liu, Shuo; Zhou, Zhi-You; Sun, Shi-Gang

    2017-03-18

    Shape transformation of Pt nanocrystals from a {730}-bounded tetrahexahedron into a {310}-bounded truncated ditetragonal prism was achieved using the electrochemical square-wave potential method. The transformation process and mechanism were revealed. This study provides new insight into the nanocrystal growth habit.

  10. 78 FR 7261 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-01

    ...-070-AD; Amendment 39-17332; AD 2013-02-11] RIN 2120-AA64 Airworthiness Directives; Airbus Airplanes.... SUMMARY: We are adopting a new airworthiness directive (AD) for all Airbus Model A310-203 airplanes. This... Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057-3356; telephone (425) 227-2125; fax...

  11. Competency-Based Adult High School Completion Student Services Guide.

    ERIC Educational Resources Information Center

    Singer, Elizabeth; And Others

    Designed as part of a 310 Special Demonstration and Teacher Training Project undertaken at Brevard Community College, this student services guide contains information to assist adult education administrators, counselors, instructors, and office personnel in meeting the needs of students enrolled in adult/community education schools. Primary…

  12. 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.

  13. 77 FR 48960 - Order Renewing Order Temporarily Denying Export Privileges

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-15

    ....'' Open source information submitted by OEE indicates that an A310 with a German Air Force designation of... 22 Dubai Airport Free Zone, P.O. Box 393754, Dubai, United Arab Emirates; and P.O. Box 52404, Dubai...; Mahmoud Amini, G 22 Dubai Airport Free Zone, P.O. Box 393754, Dubai, United Arab Emirates; and P.O....

  14. 77 FR 69391 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-19

    ... before newly calculated fatigue life limits. This proposed AD would require replacing slat extension... proposing this AD to prevent fatigue cracking, which could result in the loss of structural integrity of the... Elements (PSE). As a result, associated fatigue lives will be published in the Airbus A310...

  15. 77 FR 25930 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-02

    ... before their calculated fatigue lives. This proposed AD would require replacing certain slat extension eccentric bolts with new bolts. We are proposing this AD to prevent fatigue cracking which could result in..., associated fatigue lives will be published in the Airbus A310 Airworthiness Limitations Section (ALS) Part...

  16. 78 FR 14647 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... fatigue life limits. This AD requires replacing slat extension eccentric bolts and associated washers with new slat extension eccentric bolts and washers. We are issuing this AD to prevent fatigue cracking... (PSE). As a result, associated fatigue lives will be published in the Airbus A310...

  17. Mesoscopi Detailed Balance Algorithms for Quantum and Classical Turbulence

    DTIC Science & Technology

    2013-02-01

    the one-dimensional Magnetohydrodynamics-Burgers equations, KdV and nonlinear Schrodinger equations. Generalizing to three dimensions, quantum...Solitons We have investigated quantum unitary algorithms for both the 1D Korteweg-de-Vries and the Nonlinear Schrodinger equations [G. Vahala, J...Yepez and L. Vahala, Phys. Lett. A310, 187- 196 (2003)]. In particular to recover the 1D nonlinear Schrodinger equation for bright solitons

  18. Efficiency testing of a helicopter transmission planetary reduction stage

    NASA Technical Reports Server (NTRS)

    Handschuh, R. F.; Rohn, D. A.

    1989-01-01

    A parametric study of the efficiency of a 310-kW (420-hp) helicopter transmission planetary test section (four planets) was performed. The purpose was to determine the planetary contribution to the overall transmission power loss. Test parameters varied were oil flow rate, oil inlet temperature, lubricant type, shaft speed, and applied torque. The measured efficiency over all the test variables ranged from 99.44 to 99.75 percent. These experimental results were compared with other experimental and computational results.

  19. Efficiency testing of a helicopter transmission planetary reduction stage

    NASA Technical Reports Server (NTRS)

    Handschuh, Robert F.; Rohn, Douglas A.

    1988-01-01

    A parametric study of the efficiency of a 310-kW (420-hp) helicopter transmission planetary test section (four planets) was performed. The purpose was to determine the planetary contribution to the overall transmission power loss. Test parameters varied were oil flow rate, oil inlet temperature, lubricant type, shaft speed, and applied torque. The measured efficiency over all the test variables ranged from 99.44 to 99.75 percent. These experimental results were compared with other experimental and computational results.

  20. 14 CFR 91.1505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 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...

  1. Atomic Mass and Nuclear Binding Energy for Bh-310 (Bohrium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Bh-310 (Bohrium, atomic number Z = 107, mass number A = 310).

  2. Atomic Mass and Nuclear Binding Energy for Hs-310 (Hassium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Hs-310 (Hassium, atomic number Z = 108, mass number A = 310).

  3. Atomic Mass and Nuclear Binding Energy for Bk-310 (Berkelium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Bk-310 (Berkelium, atomic number Z = 97, mass number A = 310).

  4. Atomic Mass and Nuclear Binding Energy for Lr-310 (Lawrencium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Lr-310 (Lawrencium, atomic number Z = 103, mass number A = 310).

  5. Atomic Mass and Nuclear Binding Energy for Sg-310 (Seaborgium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Sg-310 (Seaborgium, atomic number Z = 106, mass number A = 310).

  6. Atomic Mass and Nuclear Binding Energy for Db-310 (Dubnium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Db-310 (Dubnium, atomic number Z = 105, mass number A = 310).

  7. 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.

  8. Atomic Mass and Nuclear Binding Energy for Fm-310 (Fermium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Fm-310 (Fermium, atomic number Z = 100, mass number A = 310).

  9. Atomic Mass and Nuclear Binding Energy for Mt-310 (Meitnerium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Mt-310 (Meitnerium, atomic number Z = 109, mass number A = 310).

  10. Long-term femtosecond timing link stabilization using a single-crystal balanced cross correlator.

    PubMed

    Kim, J; Chen, J; Zhang, Z; Wong, F N C; Kärtner, F X; Loehl, F; Schlarb, H

    2007-05-01

    We demonstrate a self-aligned balanced cross correlator based on a single type-II phase-matched periodically poled KTiOPO4 crystal. The birefringence of the crystal generates a walk-off between the two orthogonally polarized pulses. This enables the balancing of the cross correlator with input pulses at the same center wavelength. As a first application of this single-crystal balanced cross correlator, we stabilized a 310 m long optical fiber link for timing distribution with long-term stable 10 fs precision.

  11. Atomic Mass and Nuclear Binding Energy for Md-310 (Mendelevium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Md-310 (Mendelevium, atomic number Z = 101, mass number A = 310).

  12. 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...

  13. 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...

  14. Bigger and Brighter Flame Tests.

    ERIC Educational Resources Information Center

    Dalby, David K.; Mosher, Melvyn M.

    1996-01-01

    Describes a method for flame test demonstrations that provides a way to set up quickly, clean up, and produce a large and very intense flame that can be seen easily in a 300-seat lecture auditorium. (JRH)

  15. 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...

  16. 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...

  17. 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...

  18. 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...

  19. 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...

  20. 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...

  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. 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...

  6. 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

    ... development of a 300-room hotel, casino, restaurants, retail establishments, a convention center, an events... includes a Tribal fire station, and a 12-pump gas station with a 6,000 square-foot convenience store....

  7. 14 CFR 125.505 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 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...

  8. 14 CFR 129.107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 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...

  9. 14 CFR 121.1107 - Repairs assessment for pressurized fuselages.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 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...

  10. RDR-4B doppler weather radar with forward looking wind shear detection capability

    NASA Technical Reports Server (NTRS)

    Grasley, Steven S.

    1992-01-01

    The topics are presented in viewgraph form and include the following: Bendix/King atmospheric transport and dispersion (ATAD) position; RDR-4A technical baseline; RTA-4A characteristics; RDR-4 antenna characteristics; modification of RDR-4A to RDR-4B; RDR-4A functional block diagram; RDR-4B characteristics; development/test plan; CV-580 testing capability; CV-580 test results; Continental A300 test configuration; Continental Data Recording Program operational considerations; Continental A300 test results; and display considerations.

  11. 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.

  12. 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.

  13. Thick YBa2Cu3O7-x BaSnO3 Films with Enhanced Critical Current Density at High Magnetic Fields

    DTIC Science & Technology

    2008-10-01

    thick YBCO +BSO film had a Jc ~3×105 A/cm2 at 5 T as compared to a typical Jc of 2.4×103 A/cm2 at 5 T for a 300- nm -thick YBCO film. The thick YBCO +BSO...for a 300 nm thick YBCO film. The thick YBCO +BSO films maintained high Tc 88 K and had a high density 2.51011 /cm2 of continuous BSO nanocolumns...nanocolumns to maintain a high Jc in high magnetic fields without a reduction in Tc. Recently 300 nm thick YBCO +BSO nanocomposite films were processed using

  14. CHEER, Canadian high energy electron ring

    NASA Astrophysics Data System (ADS)

    Hemingway, R. J.

    The Institute of Particle Physics (IPP) in Canada have received funds from the Natural Sciences and Engineering Research Council (NSERC) to pursue a study which looks at the feasibility of adding an external electron storage ring at one of the long straight sections of the Tevatron. The machine, as currently configured, has a 300 MeV Linac injector, a 300 MeV accumulator ring, a 2 GeV booster synchrotron, and a 10 GeV storage ring holding 120 mA of either electrons or positrons. Particular attention has been paid to beam polarisation and the design of the interaction region.

  15. Design of a compact waveguide optical isolator based on multimode interferometers using magneto-optical oxide thin films grown on silicon-on-insulator substrates.

    PubMed

    Shui, Keyi; Nie, Lixia; Zhang, Yan; Peng, Bo; Xie, Jianliang; Deng, Longjiang; Bi, Lei

    2016-06-13

    We report the design of a waveguide optical isolator based on multimode interferometer (MMI) structure using silicon on insulator (SOI) and deposited magneto-optical (MO) thin films. The optical isolator is based on a vertical 1 × 2 SOI MMI utilizing the nonreciprocal phase shift (NRPS) difference of different TM modes of the MO garnet thin film/SOI waveguide. By constructing a silicon/MO thin film/silicon structure, we demonstrate that the NRPS of the fundamental and first order TM modes can show opposite signs for certain device dimensions, therefore significantly reduce the device length. For a 310.42 μm long device, 20 dB isolation bandwidth larger than 1.6 nm with total insertion loss of 0.817 dB is achieved at 1550 nm wavelength. The fabrication tolerances and materials losses are also discussed to satisfy the state-of-the-art fabrication technology and material properties.

  16. First observation of proton emission from 117La

    NASA Astrophysics Data System (ADS)

    Soramel, F.; Guglielmetti, A.; Stroe, L.; Müller, L.; Bonetti, R.; Malerba, F.; Poli, G. L.; Boiano, C.; Andrighetto, A.; Li, Z. C.; Scarlassara, F.; Signorini, C.; Bello, A. Dal; Isocrate, R.; Liu, Z. H.; Ruan, M.; Ivascu, M.; Bednarczyk, P.; Broude, C.

    2000-05-01

    We report the first measurement, at the XTU Tandem+LINAC accelerator of the Laboratori Nazionali di Legnaro, of the decay of the very neutron deficient nucleus 117La using a 310 MeV 58Ni beam on a 64Zn target; the 117La nucleus was populated via the (p, 4n) evaporation channel. The Recoil Mass Spectrometer (RMS) was used to select M/q=117/30 recoils that were implanted in a (40×40) mm2 Double Sided Silicon Strip Detector (DSSD) detector. The analysis has revealed that 117La decays to 116Ba via proton emission with Ep=(783±6)keV and T1/2=(20±5) ms. From this result deformation parameters of β2=0.3 and β4=0.1 have been deduced for the 117La ground state which was assigned to Jπ=3/2+.

  17. Update of Aircraft Profile Data for the Integrated Noise Model Computer Program. Volume 1. Final Report

    DTIC Science & Technology

    1992-03-01

    Dougtas DC8-50 JT3D-38 1I C 13 McDonn Douglas DC8-60 JT3D-7 1 C 17 McDonn Dougtas DC8-60 JT80-70N 1 C 14 McDonn Dougtas DC8-70 CFM56 -2C-5 3 CF 15 Br...34 Airbus A310-300 CF6-8OC2A2 3 a 97 Airbus A320-211 CFM56 -5A-1 3 B ...................... ------ ----i...narrow body 45 Boeing 8737 JT80-90N 2 C 47 Boeing s737-200 JT80-17 2 C 35 Boeing 8737-300 CFM56 -38-1 3 A 36 Boeing 8737-300 CFM56 -38-2 3 * A 85 Boeing

  18. 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.

  19. Alternative strategies for the development of Texas lignite

    SciTech Connect

    Hoskins, E.R.; Russell, J.E.

    1983-03-01

    Currently, the strip mining rate is about 35 million tons per year in Texas and essentially zero in the other Gulf Coast states. Estimates of future mining rates are as high as 310 million tons per year by the year 2000 with 240 being in Texas. In this paper, the authors examine the life cycle of the surface mineable lignite based on the most recent estimates of surface mine recoverable resources with two scenarios. The first indicates that a 310 million tpy rate could be sustained for only 15 years while the second scenario suggests that the 310 million tpy could be sustained for 25 to 30 years. If lignite resources are required beyond those that are surface mineable, the deep basin lignite will be developed. Five strategies for developing deep basin lignite are discussed.

  20. High-accuracy measurement of 240-m distance in an optical tunnel by use of a compact femtosecond laser.

    PubMed

    Minoshima, K; Matsumoto, H

    2000-10-20

    A high-accuracy optical distance meter with a mode-locked femtosecond laser is proposed for distance measurements in a 310-m-long optical tunnel. We measured the phase shift of the optical beat component between longitudinal modes of a mode-locked laser. A high resolution of 50 microm at 240-m distance was obtained without cyclic error correction. The group refractive index of air is automatically extracted to an accuracy of 6 parts per million (ppm) by two-color measurement with the pulses of fundamental and second-harmonic wavelengths. Finally, an absolute mechanical distance of 240 m was obtained to within 8-ppm accuracy by use of a series of beat frequencies with the advantage of a wide range of intermode frequency, together with the results of the two-color measurement.

  1. Abell 115: It Takes Two to Tango - The interaction of Relativistic and Thermal Plasma in a Merging Subcluster

    NASA Astrophysics Data System (ADS)

    Forman, William

    2011-09-01

    We propose a 310 ks ACIS-I observation of the merging cluster A115 whose northern subcluster, A115-N, hosts 3C28 which shows two wispy "tails" pointing in the direction of subcluster motion! With 360 ks (310 ks new, plus 50 ks archival), we can study the hydrodynamics of the gas flow in and around A115-N to determine flow velocities that are traced by the radio plasma. We will measure and compare the circulation time of the gas to the aging time of the radio emitting electrons, understand the structure of the relativistic plasma (i.e., thin sheath or filled cavity) by measuring distortions in the X-ray surface brightness, investigate magnetic draping, and develop a 3D model for the merger using extensive optical spectroscopy with the velocity of A115-N measured from the X-ray analysis.

  2. Parameter estimations for measurements of thermal transport properties with the hot disk thermal constants analyzer

    NASA Astrophysics Data System (ADS)

    Bohac, Vlastimil; Gustavsson, Mattias K.; Kubicar, Ludovit; Gustafsson, Silas E.

    2000-06-01

    The objective of this work is to improve measurements of transport properties using the hot disk thermal constants analyzer. The principle of this method is based on the transient heating of a plane double spiral sandwiched between two pieces of the investigated material. From the temperature increase of the heat source, it is possible to derive both the thermal conductivity and the thermal diffusivity from one single transient recording, provided the total time of the measurement is chosen within a correct time window defined by the theory and the experimental situation. Based on a theory of sensitivity coefficients, it is demonstrated how the experimental time window should be selected under different experimental situations. In addition to the theoretical work, measurements on two different materials: poly(methylmethacrylate) and Stainless Steel A 310, with thermal conductivity of 0.2 and 14 W/mK, respectively, have been performed and analyzed based on the developed theory.

  3. Relativistic mean-field study of the properties of Z=117 nuclei and the decay chains of the {sup 293,294}117 isotopes

    SciTech Connect

    Bhuyan, M.; Patra, S. K.; Gupta, Raj K.

    2011-07-15

    We have calculated the binding energy, root-mean-square radius, and quadrupole deformation parameter for the recently synthesized superheavy element Z=117, using the axially deformed relativistic mean-field (RMF) model. The calculation is extended to various isotopes of the Z=117 element, starting from A=286 till A=310. We predict almost spherical structures in the ground state for almost all the isotopes. A shape transition appears at about A=292 from a prolate to an oblate shape structure of the Z=117 nucleus in our mean-field approach. The most stable isotope (largest binding energy per nucleon) is found to be the {sup 288}117 nucleus. Also, the Q{sub {alpha}} values and the half-life T{sub 1/2}{sup {alpha}} for the {alpha}-decay chains of {sup 293}117 and {sup 294}117 are calculated, supporting the magic numbers at N=172 and/or 184.

  4. The ArcSDE GIS Dynamic Population Model Tool for Savannah River Site Emergency Response

    SciTech Connect

    MCLANE, TRACY; JONES, DWIGHT

    2005-10-03

    The Savannah River Site (SRS) is a 310-square-mile Department of Energy site located near Aiken, South Carolina. With a workforce of over 10,000 employees and subcontractors, SRS emergency personnel must be able to respond to an emergency event in a timely and effective manner, in order to ensure the safety and security of the Site. Geographic Information Systems (GIS) provides the technology needed to give managers and emergency personnel the information they need to make quick and effective decisions. In the event of a site evacuation, knowing the number of on-site personnel to evacuate from a given area is an essential piece of information for emergency staff. SRS has developed a GIS Dynamic Population Model Tool to quickly communicate real-time information that summarizes employee populations by facility area and building and then generates dynamic maps that illustrate output statistics.

  5. Novel β-Barrel Fold in the Nuclear Magnetic Resonance Structure of the Replicase Nonstructural Protein 1 from the Severe Acute Respiratory Syndrome Coronavirus▿

    PubMed Central

    Almeida, Marcius S.; Johnson, Margaret A.; Herrmann, Torsten; Geralt, Michael; Wüthrich, Kurt

    2007-01-01

    The nonstructural protein 1 (nsp1) of the severe acute respiratory syndrome coronavirus has 179 residues and is the N-terminal cleavage product of the viral replicase polyprotein that mediates RNA replication and processing. The specific function of nsp1 is not known. Here we report the nuclear magnetic resonance structure of the nsp1 segment from residue 13 to 128, which represents a novel α/β-fold formed by a mixed parallel/antiparallel six-stranded β-barrel, an α-helix covering one opening of the barrel, and a 310-helix alongside the barrel. We further characterized the full-length 179-residue protein and show that the polypeptide segments of residues 1 to 12 and 129 to 179 are flexibly disordered. The structure is analyzed in a search for possible correlations with the recently reported activity of nsp1 in the degradation of mRNA. PMID:17202208

  6. Linearized forward and inverse problems of the resonant ultrasound spectroscopy for the evaluation of thin surface layers.

    PubMed

    Růzek, Michal; Sedlák, Petr; Seiner, Hanus; Kruisová, Alena; Landa, Michal

    2010-12-01

    In this paper, linearized approximations of both the forward and the inverse problems of resonant ultrasound spectroscopy for the determination of mechanical properties of thin surface layers are presented. The linear relations between the frequency shifts induced by the deposition of the layer and the in-plane elastic coefficients of the layer are derived and inverted, the applicability range of the obtained linear model is discussed by a comparison with nonlinear models and finite element method (FEM), and an algorithm for the estimation of experimental errors in the inversely determined elastic coefficients is described. In the final part of the paper, the linearized inverse procedure is applied to evaluate elastic coefficients of a 310 nm thick diamond-like carbon layer deposited on a silicon substrate.

  7. Pulsed thrust measurements using electromagnetic calibration techniques

    SciTech Connect

    Tang Haibin; Shi Chenbo; Zhang Xin'ai; Zhang Zun; Cheng Jiao

    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 measured 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.

  8. Spallation of the Galileo probe heat shield

    NASA Astrophysics Data System (ADS)

    Lundell, J. H.

    1982-06-01

    The Galileo probe heat shield will encounter severe radiative and convective heating during entry into Jupiter's atmosphere. The shield is made of two different carbon phenolic composites; one is chopped-molded, and the other is tape-wrapped, both of which tend to spall under intense heating conditions. To characterize this phenomenon, an experimental program, using a gasdynamic laser, was initiated. Tests were performed at a variety of radiation intensities, and both the total and spallation mass-loss rates were measured and correlated with intensity. These correlations were then applied to calculated flight heating conditions for two model atmospheres. Entry of a 310-kg probe into the nominal atmosphere would result in a spallation mass loss of 6.3 kg, or 7.4% of the expected thermochemical mass loss. Similarly, entry of that probe into the cool-dense atmosphere would result in 11.9 kg of spallation, or about 10% of the expected thermochemical mass loss.

  9. New jack up designed for safe, efficient drilling

    SciTech Connect

    Not Available

    1993-05-10

    A recently built jack up has incorporated the latest automated drilling technology for safe operation in the harsh North Sea environment. Santa Fe drilling Co.'s Magellan jack up rig, delivered in August 1992, was designed to improve drilling operations and operate with zero discharge while keeping the rig workers removed from much of the ordinary dangerous rig operations. The rig underwent sea trials in early 1992 and demonstrated a 310-ft water depth rating for the central North Sea. The rig has complete onboard control of all fluids for a minimum impact on the marine environment. It is designed to maximize collection, retention, treatment, and monitoring of all effluent streams. No environmentally unacceptable solids or fluids are discharged, even during adverse drilling and weather conditions. Additionally, the rig engines are designed to minimize air pollution through use of a lean fuel injection system. The paper describes the exploration drilling; production drilling; automation and safety; and the handling of blowout preventers.

  10. Ghost busting - The return from the dead of PRN 8 causes pseudo-range transients

    NASA Astrophysics Data System (ADS)

    Gold, Kenneth L.

    An experiment was initiated in February of 1990 to determine the point positioning repeatability of the ISTAC 2002 codeless GPS receiver, and to investigate the precision of the GPS Control Segment navigation message uploads and the effects of Selective Availability on the Block II satellites. The C/A code range residuals, for PRN 6 alone, showed an anomaly for a 310-sec period each day. At first, the anomaly seemed to be the result of multipath contamination, especially because of its occurrence 4 min earlier each day. Upon further investigation, it was determined that the anomaly was the result of the reactivation of the Block I satellite PRN 8 after it had been supposedly turned off permanently. The process by which this conclusion was reached is described in detail. Also, an analysis of the data acquisition method of the ISTAC 2002 receiver is given.

  11. 17 CFR Appendix A to Part 151 - Spot-Month Position Limits

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...,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 Exchange Feeder Cattle 300 Chicago Mercantile Exchange Lean Hog 950 Chicago Mercantile Exchange Live...

  12. 75 FR 17465 - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Salt Creek...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-06

    ..., predatory insect endemic to saline wetlands and streams in the eastern saline wetlands of Lancaster and... insect adapted to saline wetland and stream ecosystems (Ratcliffe and Spomer 2002, p. 5). As recently as..., representing a 300 percent increase and demonstrating the dynamic nature of annual insect populations...

  13. The Effect of "Superlearning Techniques" on the Vocabulary Acquisition and Alpha Brainwave Production of Language Learners.

    ERIC Educational Resources Information Center

    Wagner, Michael J.; Tilney, Germaine

    1983-01-01

    A group of adult intensive English students, language teachers, and graduate music education students were taught a 300-word German vocabulary list in a five-week period, some with and some without Baroque music but with superlearning techniques, and some by traditional techniques. Accelerated learning by superlearning methods could not be…

  14. 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,…

  15. 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

  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

    ...''), under Nevada Water Pollution Control Law, NRS Sec. 445A.300 to 445A.730, and Section 106 and 107 of the... necessary to achieve Performance Standards (specified in the ROD); collection and analysis of water samples from downstream points in the East Fork Owyhee River to determine if persistent water quality...

  17. 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

    ... 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... Sector Northern New England. (3) Persons and vessels may request permission to enter the RNA...

  18. 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.

  19. 24 CFR 100.204 - Reasonable accommodations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... dwelling. Example (2): Progress Gardens is a 300 unit apartment complex with 450 parking spaces which are available to tenants and guests of Progress Gardens on a first come first served basis. John applies for housing in Progress Gardens. John is mobility impaired and is unable to walk more than a short...

  20. 24 CFR 100.204 - Reasonable accommodations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... dwelling. Example (2): Progress Gardens is a 300 unit apartment complex with 450 parking spaces which are available to tenants and guests of Progress Gardens on a first come first served basis. John applies for housing in Progress Gardens. John is mobility impaired and is unable to walk more than a short...

  1. 24 CFR 100.204 - Reasonable accommodations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... dwelling. Example (2): Progress Gardens is a 300 unit apartment complex with 450 parking spaces which are available to tenants and guests of Progress Gardens on a first come first served basis. John applies for housing in Progress Gardens. John is mobility impaired and is unable to walk more than a short...

  2. 75 FR 9218 - Notice of Availability Record of Decision for the Update to the Master Plan for the Consolidation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-01

    ... Alternative 2: Dispersed Density Action Alternative, as defined in the FDA Headquarters Consolidation Master... Administrator of GSA, National Capital Region to: Implement Alternative 2: Dispersed Density Action Alternative...,000-square feet and construction of a thermal water storage tank; (6) Construction of a 300,000...

  3. Biotechnician Needs Analysis.

    ERIC Educational Resources Information Center

    Edwards, Charles W., III

    The need for the development of a biotechnician curriculum was investigated. A search for operational job descriptions for biotechnicians was conducted. Industry consensus was that this is a generic term too broad to be useful. Biotechnology companies within a 300-mile radius of Chicago and universities and other colleges in Illinois that hire…

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

    Technology Transfer Automated Retrieval System (TEKTRAN)

    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...

  5. 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…

  6. 78 FR 76410 - Request for Information on Strategies To Accelerate the Testing and Adoption of Pay for Success...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-17

    ... Request for Information on Strategies To Accelerate the Testing and Adoption of Pay for Success (PFS... Success (PFS) Financing Models. The President's FY 2014 budget included a request for a $300 million one... comments, address them to Cara Camacho, Attention: Pay for Success Incentive Fund RFI, U.S. Department...

  7. The Relations between Perfectionism and Suicidality: A Systematic Review

    ERIC Educational Resources Information Center

    O'Connor, Rory C.

    2007-01-01

    Since the 1980s, there has been a 300 percent increase in the number of published papers on perfectionism. Given the inconsistent findings in the literature, this systematic review examines, for the first time, the nature of the relationship between perfectionism and suicidality. To this end, the three main psychological and medical databases…

  8. 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.

  9. Low Altitude Near-the-Horizon Propagation: A Comparison Between RPO and M-Layer

    DTIC Science & Technology

    1993-12-01

    42 4. MATLAB Plotting M-file ............................. 45 APPENDIX B: PROPAGATION LOSS UNDER THE INFLUENCE OF A 300 M SURFACE-BASED...132 vi I. INTRODUCTION A. THEORETICAL BACKGROUND The importance of environmental effects on communication links and radar systems ...has been recognized for well over two decades. The proliferation of computer programs such as the Integrated Refraction Effects Prediction System (IREPS

  10. 75 FR 37722 - Safety Zone; July Fireworks Display in Captain of the Port, Puget Sound AOR

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-30

    ... Gardner Bay, Washington in support of the City of Everett Fourth of July fireworks display and this... zone: all waters of Port Gardner Bay, WA extending out to a 300 yard radius from the launch site at 47... safety zone: All waters of Port Gardner Bay, WA between two lines with the northern line connecting...

  11. 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)

  12. Growth of hollow nickel fluoride whiskers

    SciTech Connect

    Petrov, S. V.; Orekhov, Yu. F.; Fedorov, P. P.

    2009-07-15

    Hollow nickel fluoride whiskers have been obtained by condensation from the vapor phase onto a platinum substrate in a flow of hydrogen fluoride. Crystals up to 5 mm in length have a square cross section with a 300 {+-} 30-{mu}m side. The wall thickness is 85 {+-} 20 {mu}m.

  13. Helium High Pressure Tanks at EADS Space Transportation New Technology with Thermoplastic Liner

    DTIC Science & Technology

    2005-07-13

    breadboards which were all successfully checked (geometrical and NDI: US and Xray ); figure 4 : Xray Control of a 300 L thermoplastic lined Tank 4...After testing, the tank was checked by NDI (ultrasonic, Xray ) and dimensional control. All the controls concluded in the total integrity of the tank

  14. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on.... Transmissions will be automatically prevented if: (1) The frequency-hopping mode fails to distribute the JTIDS... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited...

  15. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on.... Transmissions will be automatically prevented if: (1) The frequency-hopping mode fails to distribute the JTIDS... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited...

  16. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on.... Transmissions will be automatically prevented if: (1) The frequency-hopping mode fails to distribute the JTIDS... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited...

  17. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on.... Transmissions will be automatically prevented if: (1) The frequency-hopping mode fails to distribute the JTIDS... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited...

  18. 47 CFR 87.479 - Harmful interference to radionavigation land stations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on.... Transmissions will be automatically prevented if: (1) The frequency-hopping mode fails to distribute the JTIDS... peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited...

  19. 78 FR 38582 - Safety Zones; Multiple Firework Displays in Captain of the Port, Puget Sound Zone

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-27

    ... Guard is establishing safety zones in Holmes Harbor, Elliot Bay Pier 90, and Southeast of Alki Point... Elliot Bay, Pier 90; and Tuxedo and Tennis Shoes Event on July 20, 2013, near Alki Point Light. All... Christening, Elliot Bay, Pier 90, Seattle, WA: All waters encompassed within a 300 yard radius around...

  20. 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…

  1. Long-term patterns of diameter and basal area growth of old-growth Douglas-fir trees in western Oregon

    USGS Publications Warehouse

    Poage, Nathan; Tappeiner, J. C.

    2002-01-01

    Diameter growth and age data collected from stumps of 505 recently cut old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees at 28 sample locations in western Oregon (U.S.A.) indicated that rapid early and sustained growth of old Douglas-fir trees were extremely important in terms of attaining large diameters at ages 100a??300 years. The diameters of the trees at ages 100a??300 years (D100a??D300) were strongly, positively, and linearly related to their diameters and basal area growth rates at age 50 years. Average periodic basal area increments (PAIBA) of all trees increased for the first 30a??40 years and then plateaued, remaining relatively high and constant from age 50 to 300 years. Average PAIBA of the largest trees at ages 100a??300 years were significantly greater by age 20 years than were those of smaller trees at ages 100a??300 years. The site factors province, site class, slope, aspect, elevation, and establishment year accounted for little of the variation observed in basal area growth at age 50 years and D100a??D300. The mean age range for old-growth Douglas-fir at the sample locations was wide (174 years). The hypothesis that large-diameter old-growth Douglas-fir developed at low stand densities was supported by these observations.

  2. 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 ...

  3. 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…

  4. High Throughput Transmission Optical Projection Tomography Using Low Cost Graphics Processing Unit

    PubMed Central

    Vinegoni, Claudio; Fexon, Lyuba; Feruglio, Paolo Fumene; Pivovarov, Misha; Figueiredo, Jose-Luiz; Nahrendorf, Matthias; Pozzo, Antonio; Sbarbati, Andrea; Weissleder, Ralph

    2009-01-01

    We implement the use of a graphics processing unit (GPU) in order to achieve real time data processing for high-throughput transmission optical projection tomography imaging. By implementing the GPU we have obtained a 300 fold performance enhancement in comparison to a CPU workstation implementation. This enables to obtain on-the-fly reconstructions enabling for high throughput imaging. PMID:20052155

  5. English Language Learners in the Science Classroom

    ERIC Educational Resources Information Center

    Lincoln, Felicia; Beller, Caroline

    2004-01-01

    The changing demographics within the nation's public schools present teachers with new challenges. According to the 2000 census, the state of Arkansas, for instance, experienced a 300 percent growth in its minority language populations since 1990. That means that educators in regions such as this, and across the nation, are faced with the dilemma…

  6. 78 FR 49121 - Safety Zone; Luna Pier Fireworks, Luna Pier, MI

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-13

    ... SECURITY Coast Guard 33 CFR Part 165 Safety Zone; Luna Pier Fireworks, Luna Pier, MI AGENCY: Coast Guard... zone for the Luna Pier Fireworks Show, Luna Pier, MI, from 9:25 p.m. until 10:25 p.m. on August 24... waters of Lake Erie within a 300-yard radius of the fireworks launch site at the Clyde E. Evens...

  7. 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... Areas Seventeenth Coast Guard District § 165.1712 Safety Zones; Annual Independence Day Firework... zones: (1) All navigable waters of Taiya Inlet within a 300-yard radius of the fireworks launching...

  8. 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... Areas Seventeenth Coast Guard District § 165.1712 Safety Zones; Annual Independence Day Firework... zones: (1) All navigable waters of Taiya Inlet within a 300-yard radius of the fireworks launching...

  9. 15 CFR 8a.220 - Admissions.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Admissions. 8a.220 Section 8a.220 Commerce and Foreign Trade Office of the Secretary of Commerce NONDISCRIMINATION ON THE BASIS OF SEX IN... institution. (c) Application of §§ 8a.300 through .310. Except as provided in paragraphs (d) and (e) of...

  10. 47 CFR Appendix - Technical Appendix 2

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... as VCR, DVD, HDDVD, Blue Ray, etc. Antenna Inputs Smart Antenna interface connector (CEA 909 Smart Antenna Control Interface standard)The manufacturer may supply a 300 ohm connector or a matching transformer to connect 300 ohm ribbon leads to the required RF antenna input Antenna Pass-Through...

  11. EPA Sparks Local Business in Las Cruces, N.M.

    EPA Pesticide Factsheets

    DALLAS - (Feb. 29, 2016) The U.S. Environmental Protection Agency (EPA) is awarding a $300,000 small business contract to Vista Photonics, Inc. in Las Cruces, N.M. The company plans to develop an inexpensive, high-performance, portable air pollution

  12. 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)

  13. 26 CFR 20.2056A-4 - Procedures for conforming marital trusts and nontrust marital transfers to the requirements of a...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... estate under § 2040(a) 300,000 Devise of real property under will 100,000 Total $1,000,000 (ii) Before... Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) ESTATE AND GIFT TAXES ESTATE TAX; ESTATES OF DECEDENTS DYING AFTER AUGUST 16, 1954 Taxable Estate § 20.2056A-4 Procedures...

  14. 26 CFR 20.2056A-4 - Procedures for conforming marital trusts and nontrust marital transfers to the requirements of a...

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... estate under § 2040(a) 300,000 Devise of real property under will 100,000 Total $1,000,000 (ii) Before... Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) ESTATE AND GIFT TAXES ESTATE TAX; ESTATES OF DECEDENTS DYING AFTER AUGUST 16, 1954 Taxable Estate § 20.2056A-4 Procedures...

  15. Evolution of Naval Radio-Electronics and Contributions of the Naval Research Laboratory. Revision

    DTIC Science & Technology

    1979-01-01

    Nikola receiving antenna was a 300-foot insulated wire Tesla (1898), Professor Harry Shoemaker (1905), supported on floats from the submarine at a depth...chamber, 63 CW936. 14, 49 TENNESSEE, USS, 49 TBS. 96-97 Terrier missiles, 200-201, 237, 247 XCU. 101 Teals. Nikola , 223 Transcontinental and transoceanic

  16. Assessing Instructional Documents: A Comparison of Writing Faculty, Engineering Faculty and Workplace Technical Communicator Practices.

    ERIC Educational Resources Information Center

    Napierkowski, Harriet

    A study examined the assessment of instructional documents written by undergraduate engineering students in a 300-level technical writing course. The six documents were independently ranked by nine readers--three writing faculty, three engineering faculty, and three technical writing professionals. Besides ranking the documents, the nine readers…

  17. 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…

  18. 33 CFR 165.168 - Safety Zones; Coast Guard Captain of the Port New York Fireworks Displays.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 1983), approximately 540 yards east of Wolfes Pond Park. (b) Western Long Island Sound. The following areas are safety zones: (1) Peningo Neck, Western Long Island Sound Safety Zone: All waters of western Long Island Sound within a 300-yard radius of the fireworks barge in approximate position 40°56′21″...

  19. 33 CFR 165.168 - Safety Zones; Coast Guard Captain of the Port New York Fireworks Displays.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 1983), approximately 540 yards east of Wolfes Pond Park. (b) Western Long Island Sound. The following areas are safety zones: (1) Peningo Neck, Western Long Island Sound Safety Zone: All waters of western Long Island Sound within a 300-yard radius of the fireworks barge in approximate position 40°56′21″...

  20. 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…

  1. 7 CFR 300.3 - Reference Manual A.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Reference Manual A. 300.3 Section 300.3 Agriculture..., DEPARTMENT OF AGRICULTURE INCORPORATION BY REFERENCE § 300.3 Reference Manual A. (a) The Reference Manual for...(a) and 1 CFR part 51. (b) Availability. Copies of Reference Manual A: (1) Are available...

  2. First Report of Pratylenchus neglectus, Pratylenchus thornei and Paratylenchus hametus nematodes causing yield reduction to dry land peas and lentils in Idaho

    Technology Transfer Automated Retrieval System (TEKTRAN)

    In June 2006, stunted, chlorotic, plants in large patches were observed in two 100-acre fields of dry land peas (Pisum sativum) in Latah County Idaho which resulted in 90% and 75% crop loss. In the same region a 300 acre field of dry land lentils (Lens culinaris) also had plants showing poor growth,...

  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. 76 FR 10012 - Notice of Availability of the Draft Supplemental Environmental Impact Statement for the Disposal...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-23

    ... Supplemental Environmental Impact Statement (SEIS) evaluating the potential environmental consequences...), community services (50,000 sq ft), and parks and recreational open space (232 acres). A major component... recreational open space (222 acres), a 300-slip marina, improvements to stabilize the shoreline, and a...

  6. Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary

    SciTech Connect

    Didenko, N V; Konyashchenko, Aleksandr V; Kostryukov, P V; Losev, Leonid L; Tenyakov, S Yu

    2011-09-30

    A 300-fs radiation pulse of an ytterbium laser with a wavelength of 1030 nm and energy of 150 {mu}J were converted to a 15-fs pulse with a wavelength of 515 nm by broadening the emission spectrum in a capillary filled with xenon and by generating the second harmonic in a KDP crystal. The energy efficiency of the conversion was 30 %.

  7. 33 CFR 165.941 - Safety Zones; Annual Fireworks Events in the Captain of the Port Detroit Zone.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...), Detroit, MI: (i) Location: All waters of the Detroit River within a 300-foot radius of the fireworks.... (3) Au Gres City Fireworks, Au Gres, MI: (i) Location: All waters of Saginaw Bay within a 700-foot... located at the end of the pier near the end of Riverside Drive in Au Gres, MI. (ii) Expected date:...

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

    PubMed Central

    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. PMID:26505472

  9. Algorithme d'optimisation du profil vertical pour un segment de vol en croisiere avec une contrainte d'heure d'arrivee requise

    NASA Astrophysics Data System (ADS)

    Dancila, Radu Ioan

    FMS platform produced by CMC Electronics - Esterline for an Airbus A310 aircraft model. The performance of the algorithm was evaluated using two aircraft models, Airbus A310 and Sukhoi RRJ, three LNAV profiles and three wind profiles.

  10. Vortex research facility improvements and preliminary density stratification effects on vortex wakes

    NASA Technical Reports Server (NTRS)

    Satran, D. R.; Holbrook, G. T.; Greene, G. C.; Neuhart, D.

    1985-01-01

    Recent modernization of NASA's Vortex Research Facility is described. The facility has a 300-ft test section, scheduled for a 300-ft extension, with constant test speeds of the model up to 100 ft/sec. The data acquisition hardware and software improvements included the installation of a 24-channel PCM system onboard the research vehicle, and a large dedicated 16-bit minicomputer. Flow visualization of the vortex wake in the test section is by particle seeding, and a thin sheet of argon laser light perpendicular to the line of flight; detailed flow field measurements are made with a laser velocimeter optics system. The improved experimental capabilities of the facility were used in a study of atmospheric stratification effects on wake vortex decay, showing that the effects of temperature gradient must be taken into account to avoid misleading conclusions in wake vortex research.

  11. Proteoglycan regulation of goldfish retinal explant growth on optic tectal membranes.

    PubMed

    Su, Yung-Kang; Elam, John S

    2003-05-14

    Regenerating goldfish retinal explants cultured on poly-L-lysine overlaid with membranes isolated from 21-day regenerating 1/3 anterior optic tectum (Ant. OTec) exhibited extensive defasciculated neurite outgrowth. Heparatinase treatment of membranes caused the complete inhibition of neurite outgrowth on that substrate. Western blot analysis showed that the OTec membranes contain a 300 kDa heparan sulfate proteoglycan. Explants cultured on 21-day regenerating 1/3 Ant. OTec membranes in the presence of 1 mM beta-xyloside, an axonal proteoglycan synthesis inhibitor, showed a significant reduction in the number of neurites per explant and in the average neurite length. Taken all together, the present results provide evidence that a 300-kDa membrane HSPG present in the Ant. OTec is necessary for axonal outgrowth and that axonal PGs are involved in modulating outgrowth on 21-day regenerating 1/3 Ant. OTec membranes.

  12. Defense Conference on Nondestructive Testing (28th), 27-29 November 1979

    DTIC Science & Technology

    1979-11-29

    253 "NDI and Fracture Mechanics Analysis of a 300 HP Wind Machine Motor Shaft " H. W. Bennett, Jr., R. L. Dougids, R. D. Overley, WSMR...similar on-going inspections to assure the continued reliability of the fornwird and aft main rotor shafts . A periodic inspection of each shaft is...adherence; 3. ietali~zed coating thickness ualiformity and actual coating thickness meassurments on Irregularl y contoured surfaces; and 4. detmetion

  13. 75 FR 65311 - Renew Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-22

    ... new powerhouse containing two generating units with a combined capacity of 1,800 kilowatts (kW); (7... (10) a 400-foot-long, 12.42/7.2-kV transmission line from the valve house to a pumping station. The... two generating units with a total capacity of 500 kW; (4) a 300-foot-long, 12.42/7.2-kV...

  14. Advanced Fiber Reinforced Thermoplastic Structures

    DTIC Science & Technology

    1980-04-01

    MONITORING AGENCY NAME 6 AODRESS(,f different from (.ASAL gOfhce) IS SECURITY CLASS tof this report), Unclassified 15.. DECL ASSI FICA ; ION DOWN ORAOING 16...Matched Die Rib Tooling and Completed Rib 204 135 YC-14 Elevator Subassemblies 205 4 136 YC-14 Elevator Spar Web Assemblies 205 LI 137 Details...Task XII--Cost and Payoff Analysis A detailed cost analysis was made to determine the cost of the GRTP elevator for a 300-aircraft producton run. This

  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. Power conditioning electronics for a 500 Wh inertial energy storage system

    NASA Technical Reports Server (NTRS)

    Eakin, Vickie J.; Rodriguez, G. Ernest; Paulkovich, John

    1989-01-01

    A description is given of a pulse-width-modulated buck-boost converter designed to interface a 500 Wh inertial energy storage system operating from 70 to 140 VDC to a constant bus of 150 VDC. Implementation of hysteresis feedback control provides excellent voltage regulation. The design is based on a 300-Wh, 94 percent Wh efficient prototype and is currently being optimized to yield 97 percent overall watt-hour efficiency.

  17. Operation USPHOT-KNOTHOLE, Nevada Proving Grounds, March - June 1953. Radiological Safety Operation. Report to the Test Director,

    DTIC Science & Technology

    1953-06-01

    Shot Nancy . * . . . . . . 64 CHAPTER 4 SHOT RUTH I Surveys of Test Area 7 . . . . . . . . . . . 68 2 Yucca Flat Radiological Situation , 2 April 1953...74 3 Air Sampling Stations Recording Fail-out , Shot Ruth * * . . . * 754 Actual Cloud Track , Shot Ruth . . . . * * . * . . 76 5...Chapter 4 SHOT RUTH 4.1 INTRODUCTION S. 4.1.1 The third shot of the Upshot-Knothole series, Ruth , was detonated on a 300 ft tower in Area 7 of

  18. 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.

  19. 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.

  20. Total Quality Management in Health Care - A Study on TQM Implementation and its Application to the Army Health Care System

    DTIC Science & Technology

    1993-04-15

    Quality Management in a 300- Bed Community Hospital : The Quality Improvement Process Translated to Health Care." QMB, September 1992, pp. 293-300. Hume...get a irnzmogram. She called the Army Community Hospital for assistance. After several telephone calls, she was directed to the Radiology Department...assisted her in having her marmogram done under an external partnership agreement in the local civilian hospital . Within two weeks, Mrs. Smith was

  1. Tunable 3D extended self-assembled gold metamaterials with enhanced light transmission.

    PubMed

    Salvatore, Stefano; Demetriadou, Angela; Vignolini, Silvia; Oh, Sang Soon; Wuestner, Sebastian; Yufa, Nataliya A; Stefik, Morgan; Wiesner, Ulrich; Baumberg, Jeremy J; Hess, Ortwin; Steiner, Ullrich

    2013-05-21

    The optical properties of metamaterials made by block copolymer self-assembly are tuned by structural and environmental variations. The plasma frequency red-shifts with increasing lattice constant and blue-shifts as the network filling fraction increases. Infiltration with dielectric liquids leads also to a red-shift of the plasma edge. A 300 nm-thick slab of gyroid-structured gold has a remarkable transmission of 20%.

  2. Afghanistan: Post-Taliban Governance, Security, and U.S. Policy

    DTIC Science & Technology

    2012-04-04

    a $300 million project , mentioned above, to bring electricity from Central Asia to Afghanistan. It has also renovated the well-known Habibia High...gas. Current oil production negligible, but USAID funding project to revive oil and gas facilities in the north. Cellphones/Tourism About 6.5...CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING

  3. Diamond detector for alpha-particle spectrometry.

    PubMed

    Dueñas, J A; de la Torre Pérez, J; Martín Sánchez, A; Martel, I

    2014-08-01

    An artificially grown high purity diamond was used as a detector for alpha-particle spectrometry. Diamond detectors can match the performance of silicon detectors employed in standard continuous air monitoring systems. Its radiation hardness and electronic properties make them ideal to work under extreme condition such as high temperature and ambient lights. A 50 μm thickness single-crystal diamond detector has been compared with a 300 μm passivated implanted planar silicon detector, under ambient conditions.

  4. Confined to grow?. Publication dynamics and the proliferation of scientific journals

    NASA Astrophysics Data System (ADS)

    Daruka, Istvan

    2014-01-01

    The number of research papers published yearly shows a staggering exponential growth. One can in fact witness a century-long publication avalanche (Fig.1). According to the two major databases INSPEC and Thomson Reuters, there is a 300-fold increase in the number of published items since the year 1900. The world of science has recently reached such a level of proliferating complexity that its structural evolution itself poses challenging scientific problems.

  5. Addressing Counterfeit Parts in the DoD Supply Chain

    DTIC Science & Technology

    2014-03-01

    new old stock,” which, in turn, creates traction for the manufacture of semiconductors made from recycled , broken, fake, or otherwise inauthentic...labels. And many people cannot distinguish between a $15 and $50 bottle of wine, let alone between a $300 and a $1,000 bottle of wine, the price range...trying to sell a wine bottle that he claimed was a 1929 Domaine Ponsot. However, Domaine Ponsot did not begin bottling until 1934. Similarly

  6. Central research project report on superconductivity (FY 1988). Part 2. Magnetic-field gradiometer tank seeker. Final report, Sep 88-Sep 89

    SciTech Connect

    Nicoll, J.F.; Balko, B.; Garcia, K.K.

    1990-01-01

    A feasibility study is described herein for the use of a magnetic field gradiometer SQUID sensor, as a tank seeker and guidance system. It was determined that an antitank missile could be guided by a gradiometer to the target if delivered into a 300-meter bucket with the tank at the center. Problems of ambiguity, multiple targets and decoys, both deliberate and accidental, are discussed with numerical examples.

  7. 33 CFR 165.941 - Safety Zones; Annual Fireworks Events in the Captain of the Port Detroit Zone.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...), Detroit, MI: (i) Location: All waters of the Detroit River within a 300-foot radius of the fireworks... radius of the fireworks launch site located at position 41°43′29″ N, 083°28′47″ W (NAD 83). This area is... radius of the fireworks launch site located at position 44°1.4′ N, 083°40.4′ W (NAD 83). This area...

  8. Manufacturing Methods and Technology Project Summary Reports.

    DTIC Science & Technology

    1980-12-01

    leaving a 300-500 pound end-bell, and overheating during induction heating . Figure 1 is a photogiaph of the rotary forge. In the left foreground of...were also successfully applied to 155mm M185 tube forgings; and over 600 of these were successfully processed. b. Melting during induction heating ... Induction heating is used to heat preforms prior to forging. The preform is oscillated through an induction coil. The process parameters are current

  9. Advanced Simulator for Pilot Training: Effects of Collimation on Accommodation and Vergence

    DTIC Science & Technology

    1985-09-01

    Training ( ASPT ), used for training R&D by AFHRL, employs seven collimated display windows to provide a virtual image covering a 300 degree horizontal by...with relatively low luminance and contrast. One potential solution to the limited lumirance and contrast of the ASPT display system is simply to remove...while viewing ASPT imagery through a ILIOS. Measurements were made while the observer viewed a dynamic computer-generated scene representing the pilot’s

  10. 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.

  11. Tunable cw Single-Frequency Source for Injection Seeding 2-micrometer Lasers

    DTIC Science & Technology

    1990-06-01

    CW DROs. Output frequency distributions -5- were measured with a 300-MHz-free- spectral -range scanning interferometer and a one- meter grating...monochromator. The pulsed DRO was remarkable constant both temporally and spectrally from shot to shot at 320 kHz repetition rate, but did have a tendency to...Earlier analyses 15.1 are extended to provide a quantitative description of spectral hops between adjacent axial modes and the larger discontinuous

  12. Spider Gland Fluids: From Protein-Rich Isotropic Liquid to Insoluble Super Fiber

    DTIC Science & Technology

    2013-09-17

    proteins regardless of their large molecular weights (200 - 350 kDa). One can estimate the expected rotational correlation time of a globular ...radius of the hydration shell. If the silk proteins were folded globular proteins, we estimate a correlation time of 84 µs for a 300 kDa silk protein...for the different residues, overall these long relaxation times are typically observed for globular proteins that are an order of magnitude smaller

  13. 11 CFR 300.61 - Federal elections (2 U.S.C. 441i(e)(1)(A)).

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 11 Federal Elections 1 2010-01-01 2010-01-01 false Federal elections (2 U.S.C. 441i(e)(1)(A)). 300.61 Section 300.61 Federal Elections FEDERAL ELECTION COMMISSION BIPARTISAN CAMPAIGN REFORM ACT OF... elections (2 U.S.C. 441i(e)(1)(A)). No person described in 11 CFR 300.60 shall solicit, receive,...

  14. 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).

  15. Blunt Impact Performance Characteristics of the Advanced Combat Helmet and the Paratrooper and Infantry Personnel Armor System for Ground Troops Helmet

    DTIC Science & Technology

    2005-08-01

    protect against concussive head injury. Subsequent acquisitions of the SPH-4 helmet imposed a 300 G peak acceleration limit. Further impact protection...Hot Ambient Cron FonColden EnvironmentBack Left Right L Nape R Nape Cold Site Figure 10. Mean impact accelerations (G) of the Paratrooper PASGT tested... acceleration results obtained at the ambient condition, the hot and cold conditions were not tested. 27 Initial versus subsequent impacts The peak

  16. An integrated approach to 300 kV electrostatic discharge application during component testing that will satisfy MIL-STD-331B Appendix F

    NASA Astrophysics Data System (ADS)

    Lehmann, Monty R.; Nial, Jack; Whitaker, Mike

    1992-11-01

    The widely differing methods of producing and applying a 300 kV electrostatic stimulus to components during testing to satisfy MIL-STD-331B Appendix F has resulted in uncertainty about the validity of some test results data. Problems encountered in test methodology are examined and possible solutions are proposed. The resulting integrated systematic approach is presented; specific equipment is described, and sample waveforms are shown. Test procedures are presented in a standardized format.

  17. 37 CFR 1.17 - Patent application and reexamination processing fees.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... pursuant to § 1.136(a): (1) For reply within first month: By a micro entity (§ 1.29) $50.00 By a small entity (§ 1.27(a)) $100.00 By other than a small or micro entity $200.00 (2) For reply within second month: By a micro entity (§ 1.29) $150.00 By a small entity (§ 1.27(a)) $300.00 By other than a small...

  18. 37 CFR 1.482 - International preliminary examination fees.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Authority: (A) For an international preliminary examination fee paid on or after January 1, 2014: By a micro entity (§ 1.29) $150.00 By a small entity (§ 1.27(a)) $300.00 By other than a small or micro entity $600... paid on or after January 1, 2014: By a micro entity (§ 1.29) $190.00 By a small entity (§ 1.27(a))...

  19. Chow Bahir rift: A “failed” rift in southern Ethiopia

    NASA Astrophysics Data System (ADS)

    W-Gabriel, Giday; Aronson, James L.

    1987-05-01

    The Chow Bahir rift system is a major graben in a 300-km-broad rift zone recognized in southern Ethiopia between the Kenyan and Ethiopian domes where the East African rift is not well defined. An extinct (failed) rift discovered along the Omo Canyon to the north and on strike with the Chow Bahir rift ceased activity about 4 m.y. ago. Chow Bahir is in a younger stage of abandonment as the main Ethiopian rift propagates south into this region.

  20. 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.

  1. 40 CFR 52.1520 - Identification of plan.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 12/24/1990 8/14/1992, 57 FR 36603 Sections Env-A 101.21; .27; .33; .51; .53; .58; .63; .98; and Parts..., 67 FR 65710 Parts Env-A 206; 208; and Sections Env-A 209.01 through 209.04 are not part of the approved SIP. Env-A 300 Ambient Air Quality Standards 4/21/1989 8/19/1994, 59 FR 42766 Part Env-A 304...

  2. 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.

  3. 76 FR 14796 - Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-18

    ... Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781... CF6-50C2-F and CF6-50C2- R. (2) These engines are installed on, but not limited to, Airbus A300 series...-238-7735; fax: 781-238-7199; e- mail: tomasz.rakowski@faa.gov . (h) For service information...

  4. 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.

  5. Atomic structure of a symmetric 27{degrees}[001] tilt grain boundary in MgO

    SciTech Connect

    Yan, Yanfa; Chisholm, M.F.; Pennycook, S.J.

    1997-04-01

    The atomic structure of a symmetric 27 degree[001] tilt grain boundary in magnesium oxide has been determined by high-resolution Z-contrast imaging using a 300kV VG HB603U scanning transmission electron microscope with a 1.3 A probe. The atomic configuration in the grain boundary core is found to be considerably less open than the structures proposed for similar materials.

  6. Introduction of Women into Work Groups in Traditionally Male Career Fields: Annotated Bibliography.

    DTIC Science & Technology

    1980-06-01

    esteem is multidimensional . The emerging factors of self - esteem are: self - derogation , leadership-popularity, family-parents, and assertiveness...Palo Alto, CA: Consulting Psychologists Press, 1965. A 300-item adjective checklist for obtaining several indices of self esteem is presented. The test ...Scale and a Performance Self - Esteem Scale (PSES). High PSES ratings were positively related to non-traditional sex role attitudes and negatively related

  7. Strategic Capacity RNLA Central Maintenance Depot for Electronic Materials (ECW), Investigation into the Future Workload of ECW. (Strategische Omvang Elektronische Centrale Werkplaats (ECW) onderzoek naar de toekomstige werkiast van ECW)

    DTIC Science & Technology

    1998-03-01

    installatie van lokale netwerken RVS /EM Artillerie MeetMiddelen Meteo (5 stuks ) RVS MOR (3 stuks ) Geluid Meet Dienst (4 stuks ) Perba (80 stuks ) Vo-meters...200 A 300 stuks ) In tweede instantie is bezien of werkzaamheden die apart vermeld staan, tot een gemeenschappelijke technologiecel gerekend kunnen...Leopard) 12 Sensoren Meteo (5 stuks ) MOR (3 stuks ) Geluid Meet Dienst (4 stuks ) Perba (80 stuks ) VO-meters (200 ý 300 stuks ) EOV RPV 13 IT systemen

  8. Effect of dissolved organic matter on nitrate-nitrogen removal by anion exchange resin and kinetics studies.

    PubMed

    Song, Haiou; Yao, Zhijian; Wang, Mengqiao; Wang, Jinnan; Zhu, Zhaolian; Li, Aimin

    2013-01-01

    The effects of dissolved organic matter (DOM) on the removal of nitrate-nitrogen from the model contaminated water have been investigated utilizing the strong base anion exchange resins. With the increase of gallic acid concentration from 0 to 400 mg/L, the adsorption amount of nitrate-nitrogen on the commercial resins, including D201, Purolite A 300 (A300) and Purolite A 520E (A520E), would significantly decrease. However, the presence of tannin acid has little impact on nitrate-nitrogen adsorption on them.Compared to D201 and A300 resins, A520E resin exhibited more preferable adsorption ability toward nitrate-nitrogen in the presence of competing organic molecules, such as gallic acid and tannin acid at greater levels in aqueous solution. Attractively, the equilibrium data showed that the adsorption isotherm of nitrate-nitrogen on A520E resin was in good agreement with Langmuir and Freundlich equations. The rate parameters for the intra particle diffusion have been estimated for the different initial concentrations. In batch adsorption processes, nitrate-nitrogen diffuse in porous adsorbent and rate process usually depends on t1/2 rather than the contact time. The pseudo first- and the second-order kinetic models fit better for nitrate-nitrogen adsorption onto A520E resin. The observations reported herein illustrated that A520E resin will be an excellent adsorbent for enhanced removal of nitrate-nitrogen from contaminated groundwater.

  9. Fourier Analysis of Conservation Patterns in Protein Secondary Structure.

    PubMed

    Palaniappan, Ashok; Jakobsson, Eric

    2017-01-01

    Residue conservation is a common observation in alignments of protein families, underscoring positions important in protein structure and function. Though many methods measure the level of conservation of particular residue positions, currently we do not have a way to study spatial oscillations occurring in protein conservation patterns. It is known that hydrophobicity shows spatial oscillations in proteins, which is characterized by computing the hydrophobic moment of the protein domains. Here, we advance the study of moments of conservation of protein families to know whether there might exist spatial asymmetry in the conservation patterns of regular secondary structures. Analogous to the hydrophobic moment, the conservation moment is defined as the modulus of the Fourier transform of the conservation function of an alignment of related protein, where the conservation function is the vector of conservation values at each column of the alignment. The profile of the conservation moment is useful in ascertaining any periodicity of conservation, which might correlate with the period of the secondary structure. To demonstrate the concept, conservation in the family of potassium ion channel proteins was analyzed using moments. It was shown that the pore helix of the potassium channel showed oscillations in the moment of conservation matching the period of the α-helix. This implied that one side of the pore helix was evolutionarily conserved in contrast to its opposite side. In addition, the method of conservation moments correctly identified the disposition of the voltage sensor of voltage-gated potassium channels to form a 310 helix in the membrane.

  10. Alanine 310 is important for the activity of 1,4-α-glucan branching enzyme from Geobacillus thermoglucosidans STB02.

    PubMed

    Liu, Yiting; Li, Caiming; Gu, Zhengbiao; Xin, Chenhao; Cheng, Li; Hong, Yan; Li, Zhaofeng

    2017-04-01

    1,4-α-Glucan branching enzyme (GBE) catalyzes the formation of α-1,6 branch points in starch or glycogen by hydrolyzing α-1,4-glucosidic linkages and then synthesizing α-1,6-glucosidic linkages. In the GBE from Geobacillus thermoglucosidans STB02, alanine 310 (Ala310) is located in conserved region II. An analysis of the amino acid sequence shows that Ala310 is highly conserved in the prokaryotic GBE subfamily. Site-directed mutagenesis was used to determine the function of Ala310 in GBE. Replacement of Ala310 with glycine, aspartate, asparagine, isoleucine, glutamate, or glutamine resulted in mutant enzymes with less than 10% to 25% of wild-type activity when amylopectin or amylose was used as substrate. Studies using high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD) showed that A310G mutant had no effect on the transfer pattern, but the branching activity had been repressed to a large extent. Kinetic analysis also showed that mutations of Ala310 had an effect on the KM value that changed the preferred substrate from amylopectin to amylose. These results show that Ala310 is important for the catalytic activity of the GBE from G. thermoglucosidans STB02.

  11. Uncoupling protein 2 from carp and zebrafish, ectothermic vertebrates.

    PubMed

    Stuart, J A; Harper, J A; Brindle, K M; Brand, M D

    1999-09-01

    Uncoupling protein 1 (UCP1) is of demonstrated importance in mammalian thermogenesis, and early hypotheses regarding the functions of the newly discovered UCP homologues, UCP2, UCP3 and others, have focused largely on their potential roles in thermogenesis. Here we report the amino acid sequences of two new UCPs from ectothermic vertebrates. UCPs from two fish species, the zebrafish (Danio rerio) and carp (Cyprinus carpio), were identified in expressed sequence tag databases at the European Molecular Biology Laboratory. cDNAs from a C. carpio 'peritoneal exudate cell' cDNA library and from a D. rerio 'day 0 fin regeneration' cDNA library were obtained and fully sequenced. Each cDNA encodes a 310 amino acid protein with an average 82% sequence identity to mammalian UCP2s. The fish UCP2s are about 70% identical to mammalian UCP3s, and 60% identical to mammalian UCP1s. Carp and zebrafish are ectotherms--they do not raise their body temperatures above ambient by producing excess heat. The presence of UCP2 in these fish thus suggests the protein may have function(s) not related to thermogenesis.

  12. What Pilots like (and Don't Like) About the New Cockpit Technology

    NASA Technical Reports Server (NTRS)

    Curry, R. E.

    1984-01-01

    Pilot's perceptions of the new cockpit technology in the B-767 are discussed. Although the data reported were taken from the introductory experience of the B-767, it is felt that similar, if not identical, results would be obtained with any other new cockpit technology aircraft, i.e., the A310. The following conclusions were drawn from the information collected thus far: A large majority of the pilots enjoy flying the B-767 more than the older airplanes. The pilots accept the new cockpit technology, and they choose to use it because they find it useful. The pilots are aware of the possible loss of flying skill with the presence of automation, and they hand fly (usually with flight director) to prevent this loss. There is no evidence of loss of skills from the data collected. The primary points of confusion or surprise were autothrottle/autopilot interactions; the autopilot during the wrong way or not capturing the course; and achieving desired results with the Flight Management System/Control Display Unit (FMS/CDU). The pilots felt training for the FMS/CDU could be improved, and they especially wanted more hands on experience.

  13. Quantifying the risks of unexploded ordnance at closed military bases.

    PubMed

    MacDonald, Jacqueline A; Small, Mitchell J; Morgan, M Granger

    2009-01-15

    Some 1,976 sites at closed military bases in the United States are contaminated with unexploded ordnance (UXO) left over from live-fire weapons training. These sites present risks to civilians who might come into contact with the UXO and cause it to explode. This paper presents the first systems analysis model for assessing the explosion risks of UXO at former military training ranges. We develop a stochastic model for estimating the probability of exposure to and explosion of UXO, before and after site cleanup. An application of the model to a 310-acre parcel at Fort Ord, California, shows that substantial risk can remain even after a site is declared clean. We estimate that risk to individual construction workers of encountering UXO that explodes would range from 4 x 10(-4) to 5 x 10(-2), depending on model assumptions, well above typical Occupational Safety and Health Administration (OSHA) and U.S. Environmental Protection Agency (EPA) target risk levels of 10(-4) to 10(-6). In contrast, a qualitative UXO risk assessment method, the Munitions and Explosives of Concern Hazard Assessment (MEC HA), developed by an interagency work group led by the EPA, indicates that the explosion risk at the case study site is low and "compatible with current and determined or reasonably anticipated future risk." We argue that a quantitative approach, like that illustrated in this paper, is necessary to provide a more complete picture of risks and the opportunities for risk reduction.

  14. Initiation of cyp26a1 Expression in the Zebrafish Anterior Neural Plate by a Novel Cis-Acting Element

    PubMed Central

    Chen, Chunhong; Stedman, Aline; Havis, Emmanuelle; Anselme, Isabelle; Onichtchouk, Daria; Giudicelli, François; Schneider-Maunoury, Sylvie

    2016-01-01

    Early patterning of the vertebrate neural plate involves a complex hierarchy of inductive interactions orchestrated by signalling molecules and their antagonists. The morphogen retinoic acid, together with the Cyp26 enzymes which degrade it, play a central role in this process. The cyp26a1 gene expressed in the anterior neural plate thus contributes to the fine modulation of the rostrocaudal retinoic acid gradient. Despite this important role of cyp26a1 in early brain formation, the mechanisms that control its expression in the anterior neural plate are totally unknown. Here, we present the isolation of a 310-base-pair DNA element adjacent to cyp26a1 promoter, displaying enhancer activity restricted to the anterior neural plate of the zebrafish gastrula. We show that unlike that of cyp26a1, expression driven by this cyp26a1 anterior neural plate element (cANE) is independent of retinoic acid. Through deletion analysis, we identify a 12-nucleotide motif essential for cANE activity. A consensus bipartite binding site for SoxB:Oct transcription factors overlaps with this motif. Mutational analysis suggests that SoxB binding is essential for its activity. We discuss the contribution of this study to the elucidation of the regulatory hierarchy involved in early neural plate patterning. PMID:26959238

  15. Long-path measurements of pollutants and micrometeorology over Highway 401 in Toronto

    NASA Astrophysics Data System (ADS)

    Staebler, R. M.; You, Y.; Mittermeier, R. L.; Moussa, S.; Liggio, J.; Su, Y.

    2015-12-01

    Highway traffic emissions are an important source of air pollution, especially in urban areas. Traffic-related pollution has been linked to a number of adverse health effects, such as respiratory problems, cancer, heart failure, and a general increase in mortality. Determining the pollutants involved and quantifying their emission rates is paramount in developing high resolution air quality models to predict future developments with some confidence. Highway 401, as it passes through Toronto, is the world's busiest highway with a typical traffic volume of over 450,000 vehicles per day. In July 2015, three weeks of measurements were conducted over the 401 with an open-path FTIR (Fourier Transform infra-red) spectrometer in parallel with a scintillometer, integrating a variety of gas concentrations as well as turbulence parameters over a 310m path length. Relationships between traffic volume, micrometeorological conditions and the build-up and venting of pollutants on the highway are analyzed and quantified, demonstrating the role of stratification and turbulence in the accumulation and dispersal of traffic emissions. The feasibility of deriving emission rates by combining the micrometeorological data from the scintillometer with the gas concentrations from the FTIR using an inverse dispersion approach is investigated. The suitability of this novel approach for long-term monitoring of emissions is discussed. The findings will be compared with output from a high-resolution air quality model (GEM-MACH) to aid future improvements in the sub-grid parameterization of pollutant dispersion.

  16. Self-assembly of complex two-dimensional shapes from single-stranded DNA tiles.

    PubMed

    Wei, Bryan; Vhudzijena, Michelle K; Robaszewski, Joanna; Yin, Peng

    2015-05-08

    Current methods in DNA nano-architecture have successfully engineered a variety of 2D and 3D structures using principles of self-assembly. In this article, we describe detailed protocols on how to fabricate sophisticated 2D shapes through the self-assembly of uniquely addressable single-stranded DNA tiles which act as molecular pixels on a molecular canvas. Each single-stranded tile (SST) is a 42-nucleotide DNA strand composed of four concatenated modular domains which bind to four neighbors during self-assembly. The molecular canvas is a rectangle structure self-assembled from SSTs. A prescribed complex 2D shape is formed by selecting the constituent molecular pixels (SSTs) from a 310-pixel molecular canvas and then subjecting the corresponding strands to one-pot annealing. Due to the modular nature of the SST approach we demonstrate the scalability, versatility and robustness of this method. Compared with alternative methods, the SST method enables a wider selection of information polymers and sequences through the use of de novo designed and synthesized short DNA strands.

  17. Diatom Mimics: Directing the Formation of Biosilica Nanoparticles by Controlled Folding of Lysine-Leucine Peptides

    PubMed Central

    Baio, Joe E.; Zane, Ariel; Jaeger, Vance; Roehrich, Adrienne M.; Lutz, Helmut; Pfaendtner, Jim; Drobny, Gary P.; Weidner, Tobias

    2015-01-01

    Silaffins, long chain polyamines, and other biomolecules found in diatoms are involved in the assembly of a large number of silica nanostructures under mild, ambient conditions. Nanofabrication researchers have sought to mimic the diatom's biosilica production capabilities by engineering proteins to resemble aspects of naturally occurring biomolecules. Such mimics can produce monodisperse biosilica nanospheres, but in vitro production of the variety of intricate biosilica nanostructures that compose the diatom frustule is not yet possible. In this study we demonstrate how LK peptides, composed solely of lysine (K) and leucine (L) amino acids arranged with varying hydrophobic periodicities, initiate the formation of different biosilica nanostructures in vitro. When L and K residues are arranged with a periodicity of 3.5 the α-helical form of the LK peptide produces monodisperse biosilica nanospheres. However, when the LK periodicity is changed to 3.0, corresponding to a 310 helix, the morphology of the nanoparticles changes to elongated rod-like structures. β-strand LK peptides with a periodicity of 2.0 induce wire-like silica morphologies. This study illustrates how the morphology of biosilica can be changed simply by varying the periodicity of polar and nonpolar amino acids. PMID:25285787

  18. 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.

  19. [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.

  20. 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.

  1. Controlling the multiport nature of Bragg diffraction in atom interferometry

    NASA Astrophysics Data System (ADS)

    Parker, Richard H.; Yu, Chenghui; Estey, Brian; Zhong, Weicheng; Huang, Eric; Müller, Holger

    2016-11-01

    Bragg diffraction has been used in atom interferometers because it allows signal enhancement through multiphoton momentum transfer and suppression of systematics by not changing the internal state of atoms. Its multiport nature, however, can lead to parasitic interferometers, allows for intensity-dependent phase shifts in the primary interferometers, and distorts the ellipses used for phase extraction. We study and suppress these unwanted effects. Specifically, phase extraction by ellipse fitting and the resulting systematic phase shifts are calculated by Monte Carlo simulations. Phase shifts arising from the thermal motion of the atoms are controlled by spatial selection of atoms and an appropriate choice of Bragg intensity. In these simulations, we found that Gaussian Bragg pulse shapes yield the smallest systematic shifts. Parasitic interferometers are suppressed by a "magic" Bragg pulse duration. The sensitivity of the apparatus was improved by the addition of ac Stark shift compensation, which permits direct experimental study of sub-part-per-billion (ppb) systematics. This upgrade allows for a 310 ℏ k momentum transfer, giving 6.6 Mrad measured in a Ramsey-Bordé interferometer.

  2. Absence of the mecA Gene in Methicillin Resistant Staphylococcus aureus Isolated from Different Clinical Specimens in Shendi City, Sudan

    PubMed Central

    Elhassan, Mogahid M.; Ozbak, Hani A.; Hemeg, Hassan A.; Elmekki, Miskelyemen A.; Ahmed, Leila M.

    2015-01-01

    Absolute dependence on mecA gene as the defining standard in determining the resistance of S. aureus to methicillin became the subject of distrust by many researchers. The present study aimed to determine the frequency of mecA gene in methicillin resistant S. aureus (MRSA) isolates using polymerase chain reaction and to correlate its presence to conventional method. In this regard, two hundred S. aureus isolates were collected from patients with different diseases attending different hospitals in Shandi City, Sudan. Phenotypic Kirby-Bauer method confirmed the existence of methicillin resistant S. aureus in 61.5% of the subjected isolates with MICs ranging from 4 μg/mL to 256 μg/mL when using E-test. However, when amplifying a 310 bp fragment of the mecA gene by PCR, twelve out of the 123 MRSA isolates (9.8%) were mecA negative, whereas all the 77 methicillin sensitive S. aureus (MSSA) were mecA negative. In conclusion, this study drew attention to the credibility of the mecA gene and its usefulness in the detection of all MRSA strains without referring to the traditional methods. Hence, it is highly recommended to consider alternative mechanisms for β-lactam resistance that may compete with mecA gene in the emergence of MRSA phenomenon in the community. PMID:26290877

  3. Study of V2 vasopressin receptor hormone binding site using in silico methods

    PubMed Central

    Sebti, Yeganeh; Sardari, Soroush; Sadeghi, Hamid Mir Mohammad; Ghahremani, Mohammad Hossein; Innamorati, Giulio

    2015-01-01

    The antidiuretic effect of arginine vasopressin (AVP) is mediated by the vasopressin V2 receptor. The docking study of AVP as a ligand to V2 receptor helps in identifying important amino acid residues that might be involved in AVP binding for predicting the lowest free energy state of the protein complex. Whereas previous researchers were not able to detect the exact site of the ligand-receptor binding, we designed the current study to identify the vasopressin V2 receptor hormone binding site using bioinformatic methods. The 3D structure of nonapeptide hormone vasopressin was extracted from Protein Data Bank. Since no suitable template resembling V2 receptor was found, an ab initio approach was chosen to model the protein receptor. Using protein docking methods such as Hex protein-protein docking, the model of V2 receptor was docked to the peptide ligand AVP to identify possible binding sites. The residues that involved in binding site are W293, W296, D297, A300, and P301. The lowest free energy state of the protein complex was predicted after mutation in the above residues. The amount of gained energies permits us to compare the mutant forms with native forms and help to asses critical changes such as positive and negative mutations followed by ranking the best mutations. Based on the mutation/docking predictions, we found some mutants such as W293D and A300E possess positively inducing effect in ligand binding and some of them such as A300R present negatively inducing effect in ligand binding. PMID:26600856

  4. DC buffering and floating current for a high voltage IMB application

    SciTech Connect

    Morrison, J. L.

    2014-08-01

    An interface technique for the latest generation of the Impedance Measurement Box (IMB) has been conceived to enable measurement of impedance spectra for battery modules up to 300V. A 300V capable or higher IMB is an enabling technology for in-situ diagnostics within electric vehicle charging stations or battery back-ups within power distribution sub-stations. It is possible that the existing IMB can be adapted via a 300V interface module to a test battery with voltage significantly greater than 50V. Recently a new concept was conceived for the calibration, algorithm and electronics of the IMB. That algorithm and calibration for that concept have been physically validated. The principal feature of the new electronics is the floating current source excitation of the battery under test. The single ended current excitation of the battery under test, used in the 50V IMB, requires that the negative terminal of the test battery must be the analog ground for the IMB. The new floating current technique allows the test battery to be fully high impedance isolated for a measurement. That isolation will improve IMB noise immunity and enable interrogation of cells internal to a battery module. All these techniques still use the same rapid concept for impedance measurement with the IMB. The purpose of this disclosure is to provide an overview of the analytical validation for three concepts to interface the floating current excitation to a high voltage battery. Recursive simulation models were used in different test scenarios to validate the various new concepts. The analysis will show that it is possible to interface the floating signal current to obtain an impedance measurement on a high voltage test battery. Additionally, the analysis will investigate stress seen by electronics while testing a 300V battery.

  5. Efficiency and Spectrum Enhancement in a Tapered Free-Electron Laser Amplifier

    SciTech Connect

    Wang, X. J.; Harder, D.; Murphy, J. B.; Qian, H.; Shen, Y.; Yang, X.; Freund, H. P.; Miner, W. H. Jr.

    2009-10-09

    We report the first experimental characterization of efficiency and spectrum enhancement in a laser-seeded free-electron laser using a tapered undulator. Output and spectra in the fundamental and third harmonic were measured versus distance for uniform and tapered undulators. With a 4% field taper over 3 m, a 300% (50%) increase in the fundamental (third harmonic) output was observed. A significant improvement in the spectra with the elimination of sidebands was observed using a tapered undulator. The experiment is in good agreement with predictions using the MEDUSA simulation code.

  6. Atomic Mass and Nuclear Binding Energy for Bh-300 (Bohrium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Bh-300 (Bohrium, atomic number Z = 107, mass number A = 300).

  7. Experience using an automated fault location system with a time-of-flight wall detector array

    NASA Astrophysics Data System (ADS)

    Olson, D.; Greiman, W.; Hall, D.; Balaban, D.; Day, C.

    1990-08-01

    We describe the architecture of a general purpose monitoring system and give examples of its use with a 300 element detector array in a relativistic heavy ion experiment. The system has a simple and well defined interface between the detector specific parts of the system and those which are independent of any detector specific features. Tracking simple statistics on the fundamental data items (ADC and TDC values) are sufficient to diagnose the higher level components in the system. The monitoring of on-line beam data provides a sensitive monitor of global parameters of the experiment.

  8. Wavelength-modulation detection of acetylene with a near-infrared external-cavity diode laser

    NASA Astrophysics Data System (ADS)

    Oh, Daniel B.; Hovde, David Christian

    1995-10-01

    An external-cavity diode laser operating at 1500 nm was used to record the combination band of acetylene (C2H2). By combination of wavelength-modulation spectroscopy with a noise-canceler detection circuit, a minimum detectable absorbance of 4.8 \\times 10 -4 with a 300-ms time constant was achieved, although this result was limited by etalon fringes. When combined with this detection technique, continuous, widely tunable output from an external-cavity laser is ideally suited for high-resolution absorption spectroscopy with excellent sensitivity.

  9. New compact neutron polarizer

    NASA Astrophysics Data System (ADS)

    Krist, Th; Kennedy, S. J.; Hicks, T. J.; Mezei, F.

    A new type of a neutron polarizing bender was developed in co-operation with BENSC and ANSTO. It is based upon bent thin silicon wafers coated on one side with SiFeCo polarizing supermirrors and on the other side with Gd. Initial tests at BENSC in a 300 Oe magnetic field yielded a transmission of spin-up neutrons of about 55% over an angle range of 0.75° and flipping ratios > 30. Subsequent tests at ANSTO at 1200 Oe yielded a transmission of 48% with a flipping ratio > 45.

  10. 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

  11. Atomic Mass and Nuclear Binding Energy for Hs-300 (Hassium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Hs-300 (Hassium, atomic number Z = 108, mass number A = 300).

  12. 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.

  13. Formation of cubic boron-nitride by the reactive sputter deposition of boron

    SciTech Connect

    Jankowski, A.F.; Hayes, J.P.; Makowiecki, D.W.; McKeman, M.A.

    1997-03-01

    Boron-nitride films are synthesized by RF magnetron sputtering boron targets where the deposition parameters of gas pressure, flow and composition are varied along with substrate temperature and applied bias. The films are analyzed using Auger electron spectroscopy, transmission electron microscopy, nanoindentation, Raman spectroscopy and x-ray absorption spectroscopy. These techniques provide characterization of film composition, crystalline structure, hardness and chemical bonding, respectively. Reactive, rf-sputtering process parameters are established which lead to the growth of crystalline BN phases. The deposition of stable and adherent boron nitride coatings consisting of the cubic phase requires 400 `C substrate heating and the application of a 300 V negative bias.

  14. Strength and deformation characteristics of poly(ethylene terephtalate)/elastomer blends

    NASA Astrophysics Data System (ADS)

    Merijs Meri, R.; Bocoka, T.; Zicans, J.; Kalnins, M.; Kalkis, V.; Bledzki, A. K.

    2008-07-01

    Changes in the toughness of crystalline poly(ethylene terephtalate) upon addition of two elastomers — ethylene-propylene-diene terpolymer and ethylene- α-octene copolymer — are investigated. Blends with increasing elastomer content (up to 30 wt.%) were obtained and modified by γ-radiation up to a 300-kGy absorbed dose. The interrelation between the toughness and certain tensile characteristics (elastic modulus, yield stress, ultimate stress, elongation at break, and specific fracture energy) of the blends, with various structural features of components (crystallinity and the degree of cross-linking) and morphology of the blends, is discussed.

  15. Observation of field-induced domain wall propagation in magnetic nanowires by magnetic transmission X-ray microscopy

    SciTech Connect

    Bryan, M. T.; Fry, P. W.; Fischer, P.; Allwood, D. A.

    2007-12-01

    Magnetic transmission X-ray microscopy (M-TXM) is used to image domain walls in magnetic ring structures formed by a 300 nm wide, 24 nm thick Ni{sub 81}Fe{sub 19} nanowire. Both transverse and vortex type domain walls are observed after application of different field sequences. Domain walls can be observed by comparing images obtained from opposite field sequences, or else domain wall propagation observed by comparing successive images in a particular field sequence. This demonstrates the potential use of M-TXM in developing and understanding planar magnetic nanowire behavior.

  16. 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.

  17. XV-15 flight test results compared with design goals

    NASA Technical Reports Server (NTRS)

    Wernicke, K. G.; Magee, J. P.

    1979-01-01

    Aircraft No. 2 is presently in the midst of flight envelope expansion. Noise and safety design goals have been demonstrated; preliminary results indicate that performance and component life goals may also be met. Hovering power indicates a standard hover ceiling of 7,000 feet. After 18.0 hours of flight, a true airspeed of 207 knots has been reached. The goal is a 300-knot cruise speed. So far, XV-15 flight tests indicate no reason why the tilt rotor concept should not fulfill its promise to provide a major step forward in air vehicle flexibility and in rotary wing performance.

  18. The Los Alamos beacon receiver array

    SciTech Connect

    Carlos, R.C.; Massey, R.S. )

    1994-07-01

    The authors are interested in studying both the natural background of acoustic and acoustic-gravity waves, for which the sources are not generally known, as well as waves produced by known sources such as large explosions and launches of large rockets. The authors describe radio receivers that monitor transmissions from beacons on geosynchronous satellites. The receivers can detect perturbations of a 300--3,000 s period in the electron density integrated from beacon to receiver, for amplitudes as low as (1--2) [times] 10[sup 13] m[sup [minus]2]. Data are used in studies of atmospheric acoustic and acoustic-gravity waves.

  19. Effect of Small Transmission Delay on Human Behavior in Audio Communication

    NASA Astrophysics Data System (ADS)

    Ohnishi, Hitoshi; Mochizuki, Kaname

    Transmission delay in audio communications is a well-known obstacle to achieving smooth communication. However, it is not known what kinds of effects are caused by small delays. We hypothesized that the small delay in the listener's responses disturbs the speaker's “verbal conditioning, ” where the verbal behavior of the speaker varies in accordance with the listener's responses. We examined whether the small delays in the listener's responses disturb the speaker's verbal conditioning using an artificial-grammar learning task. The results suggested that a 300-ms delay disturbed the participants' verbal conditioning although they were not adequately aware of the delay.

  20. Atomic Mass and Nuclear Binding Energy for Bk-300 (Berkelium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Bk-300 (Berkelium, atomic number Z = 97, mass number A = 300).

  1. Design and Prototyping of an Ionization Profile Monitor for the SNS Accumulator Ring

    SciTech Connect

    Bartkoski, Dirk A; Deibele, Craig E; Polsky, Yarom

    2014-12-01

    An ionization profile monitor (IPM) has been designed for the Spallation Neutron Source (SNS) accumulator ring. Utilizing ionized electrons produced by beam-gas ionization, the SNS IPM uses a 120 kV bias potential to overcome beam space charge and accelerate electrons towards a movable particle detector. A 300 G magnetic field is used to confine the transverse electron motion, resulting in profile errors at the estimated 7% level. With a system bandwidth of 17.5 MHz. The SNS IPM is capable of measuring turn-by-turn beam profiles for a fully accumulated beam. This paper presents a description of the system and design.

  2. 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.

  3. The AMPTE lithium releases in the solar wind - A possible trigger for geomagnetic pulsations

    NASA Technical Reports Server (NTRS)

    Luehr, Hermann; Baumjohann, Wolfgang; Potemra, Thomas A.

    1990-01-01

    Shortly after the AMPTE/IRM satellite had released Lithium ions into the solar wind, magnetometers on the ground and in the frontside magnetosphere observed deflections of a type similar to those associated with solar wind pressure pulses. Since the natural solar wind was very stable during this event and did not exhibit pressure changes, the magnetic deflections have likely been caused by the artificially injected Lithium cloud when it hit the magnetosphere. Order of magnitude estimates show that 300 g of Lithium vapor released in the solar wind are indeed able to produce a 300 nT magnetic deflection on the ground under favorable conditions.

  4. Nanofabrication on ZnO nanowires

    SciTech Connect

    Zhan Jinhua; Bando, Yoshio; Hu, Junqing; Golberg, Dmitri

    2006-12-11

    ZnO nanowires were subjected to convergent electron beam irradiation in a 300 kV transmission electron microscope. The size of perforated hexagonal pores generated by irradiation can vary with the beam size. An irradiated area is denuded layer by layer via removal of Zn and O atoms. The polar ZnO surfaces have a higher resistance to irradiation than the unpolar ones. Ultrathin nanobridges, {approx}1 nm thick or less, were generated through deliberate removal of Zn and O atomic monolayers.

  5. Small geothermal binary plants in Mexico

    SciTech Connect

    Lopez-Diaz, M.

    1996-12-31

    In Mexico, Comision Federal de Electricidad (CFE Federal Commission of Electricity) has identified several low enthalpy sites related with thermal water, at shallow depths. Some of those geothermal prospects are located far from the electrical national grid. In some cases, the population solve their electricity needs by internal combustion engines with very high operating costs. CFE has started a project oriented to use the energy contained in the thermal waters with off-grid binary plants. The two first projects are in the state of Chihuahua at the north of the country: San Antonio El Bravo and Maguarichic. At both places CFE will install a 300 kW, unattended binary power units.

  6. Molecular Depth Profiling using a C(60) Cluster Beam: the Role of Impact Energy.

    PubMed

    Wucher, Andreas; Cheng, Juan; Winograd, Nicholas

    2008-10-23

    Molecular depth profiling of organic overlayers was performed using a mass selected C(60) ion beam in conjunction with time-of-flight (TOF-SIMS) mass spectrometry. The characteristics of sputter depth profiles acquired for a 300-nm Trehalose film on silicon were studied as a function of the kinetic impact energy of the projectile ions. The results are interpreted in terms of a simple model describing the balance between sputter erosion and ion induced chemical damage. It is shown that the efficiency of the projectile to clean up the fragmentation debris produced by its own impact represents a key parameter governing the success of molecular depth profile analysis.

  7. Atomic Mass and Nuclear Binding Energy for Lr-300 (Lawrencium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Lr-300 (Lawrencium, atomic number Z = 103, mass number A = 300).

  8. Atomic Mass and Nuclear Binding Energy for Sg-300 (Seaborgium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Sg-300 (Seaborgium, atomic number Z = 106, mass number A = 300).

  9. Uniform Theory of Diffraction (UTD) Scattering from Structures, Including Higher Order Terms. Volume 1. Far-Zone Bistatic Scattering from Flat Plates

    DTIC Science & Technology

    1990-11-01

    pattern (4 = 00) for Sikta’s triangle with a 3A and a = 30’. 113 mN -- i3 S• Corner Diffration ] - -. Sikta’s First Order 1 0 Ŕ 60 90 120 150 a 0 (deg...30 60 90 120 150 to 0 (deg.) Figure 79: The E-plane pattern (= - 00) for Sikta’s triangle with a = 9A and a = 300. 115 ,’• q Corner Diffration ...Figure 125: Co-polarized RCS in the 4 = 75’ plane of a 2A square plate with a ., polarized fixed source at Oi 450, 0’ = 450. - Corner Diffration Mome. n

  10. Impact of Vehicles on Smoke Spread Dynamics in the Case of Fire in Road Tunnel

    NASA Astrophysics Data System (ADS)

    Valasek, L.; Glasa, J.; Weisenpacher, P.; Halada, L.

    2015-01-01

    In this paper, the impact of vehicles in road tunnel on smoke spread in case of fire is illustrated using the FDS (Fire Dynamics Simulator) system. FDS is a CFD-based fire field model capable to simulate fire in various environments capturing a big variety of physical processes related to fire. A set of simulations of fire in a 300 m long two-lane single directional road tunnel with longitudinal ventilation is described focusing on the impact of vehicles on the smoke spread dynamics in the tunnel.

  11. Biological Applications and Effects of Optical Masers.

    DTIC Science & Technology

    1978-09-01

    m in diameter 24 hours after exposure to a combined white light ( Fundus camera , position 3) and Ga-As laser at a prf of 1200 Hz The calculated...produced with the fundus camera set on position 3 which produces a 300 cone of white light on the retina. It is estimated that the 500 second exposure...resulted in a radiant exposure to the retina of 650 J/cm2 . Exposure to the laser for 500 s without the fundus camera illumination did not produce a

  12. 300-kW Solar Electric Propulsion System Configuration for Human Exploration of Near-Earth Asteroids

    NASA Technical Reports Server (NTRS)

    Brophy, John R.; Gershman, Robert; Strange, Nathan; Landau, Damon; Merrill, Raymond Gabriel; Kerslake, Thomas

    2011-01-01

    The use of Solar Electric Propulsion (SEP) can provide significant benefits for the human exploration of near-Earth asteroids. These benefits include substantial cost savings - represented by a significant reduction in the mass required to be lifted to low Earth orbit - and increased mission flexibility. To achieve these benefits, system power levels of 100's of kW are necessary along with the capability to store and process tens of thousands of kilograms of xenon propellant. The paper presents a conceptual design of a 300-kW SEP vehicle, with the capability to store nearly 40,000 kg of xenon, to support human missions to near-Earth asteroids.

  13. Easy creation of polymeric systems for molecular dynamics with Assemble!

    NASA Astrophysics Data System (ADS)

    Degiacomi, Matteo T.; Erastova, Valentina; Wilson, Mark R.

    2016-05-01

    We present Assemble!, a program greatly simplifying the preparation of molecular dynamics simulations of polymeric systems. The program is controlled either via command line or an intuitive Graphical User Interface, and runs on all major operating systems. Assemble! allows the creation of a desired system of polymer chains from constituent monomers, packs the chains into a box according to the required concentration and returns all the files needed for simulation with Gromacs. We illustrate the capabilities of Assemble! by demonstrating the easy preparation of a 300 monomers-long polyisoprene in hexane, and a heterogeneous mixture of polybutadiene.

  14. Magnetic induction-induced resistive heating of optical fibers and gratings.

    PubMed

    Canning, John; Naqshbandi, Masood; Cook, Kevin; Huyang, George

    2013-03-15

    Magnetic induction heating of optical fibers packaged with a steel plate is studied using a fiber Bragg grating. The dependence on the induced wavelength shift with magnetic field is obtained for a commercially available induction heater. More than a 300°C temperature rise is observed within seconds. The potential of magnetic induction as an efficient and rapid means of modulating devices and as a novel approach to potential optical based magnetic field and current sensing is proposed and discussed. The extension of the ideas into micro and nanophotonics is described.

  15. Culture and spray-drying of Tsukamurella paurometabola C-924: stability of formulated powders.

    PubMed

    Hernández, Armando; Weekers, Fréderic; Mena, Jesús; Pimentel, Eulogio; Zamora, Jesús; Borroto, Carlos; Thonart, Philippe

    2007-11-01

    The nematocidal agent, Tsukamurella paurometabola C-924, was cultured in a 300 l bioreactor. Spray-dried formulations of this microorganism were prepared using sucrose. At an outlet temperature 62 degrees C, survival rates between 12 and 85% were reached with sucrose up to 10% (w/w). The stability study of the powders showed that the best storage condition was at 4 degrees C under vacuum. A new method for the calculation of cell death order for bacteria stored at low temperatures was developed. Powders stored under vacuum showed an Arrhenius behavior in relation to cell death kinetics.

  16. Atomic Mass and Nuclear Binding Energy for Db-300 (Dubnium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Db-300 (Dubnium, atomic number Z = 105, mass number A = 300).

  17. Robust Recognition of Loud and Lombard speech in the Fighter Cockpit Environment

    DTIC Science & Technology

    1988-08-01

    CLEAR CHAFF AND FLARE A222 BACKUP A223 DISPLAY CONTROL A224 CLEAR CONTROL A225 DISPLAY DIMMER : :,:, . :,,’’, ,,’,’:,,Y’. " " : :,’Z.’&..’.,.’.’.’Z...character*1 ans character*7 fileI,file2,file3 character*10 class(10) character*36 tdfilename real a(300), cr (300),cd(300) real rnn(40,10), scr(40,10), scd...continue if (printit) write (6,32) c Now initialize the cumulative rank and distance arrays. They c will have old data from a previous row. do 70 i , ip cr

  18. South Bangkok combined cycle plant technical feasibility study. Export trade information

    SciTech Connect

    Not Available

    1990-07-01

    The report, written by Black and Veatch International, was funded by the U.S. Trade and Development Agency on behalf of the Electricity Generating Authority of Thailand. It establishes the conceptual design for the installation of a 300 MW combined cycle unit at the South Bangkok Plant. It is divided into the following sections: Gas/Oil Resource Assessment; Water Resources Assessment; Bases of Design; Site Arrangement; Generation Plant Arrangement; Conceptual Design; Transmission System Integration; Capital and Operating Cost Estimate; and Project Implementation.

  19. A methanol/oxygen burning combustor for an aircraft auxiliary emergency power unit

    SciTech Connect

    Carr, E.; Todd, H. , Burnley, Lancashire )

    1989-01-01

    The development of advanced single-engine aircraft with reduced stability and Fly-by-Wire control systems requires the provision of emergency hydraulic and electrical power from a stored energy system. The desire to achieve this objective using readily available fluids of low toxicity has led to the development of a methanol/oxygen burning combustor to provide a hot gas stream to drive a small turbine. The paper describes the performance of a 300 kW output combustor, which is cooled by the methanol consumed.

  20. Enhanced preconcentration of selected chlorofluorocarbons on multiwalled carbon nanotubes with polar functionalities.

    PubMed

    Saridara, Chutarat; Hussain, Chaudhery Mustansar; Ragunath, Smruti; Mitra, Somenath

    2015-02-01

    Chromatographic monitoring of chlorofluorocarbons in air requires the preconcentration of these highly volatile species. In this paper, we present functionalized multiwalled carbon nanotubes as effective sorbents for a microtrap designed for chlorofluorocarbons preconcentration. Among the commercial carbons and carbon nanotubes studied, functionalization via carboxylation and propyl amine was most effective for dichlorofluoromethane and trichlorofluoromethane (Freon 11), which were selected as representative chlorofluorocarbons. The results show that carbon nanotubes functionalized with a polar groups led to as much as a 300% increase in breakthrough volume and the desorption bandwidth was reduced by 2.5 times.

  1. 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.

  2. Atomic Mass and Nuclear Binding Energy for Pa-300 (Protactinium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Pa-300 (Protactinium, atomic number Z = 91, mass number A = 300).

  3. Flux Pinning Enhancement in YBa2Cu3O7-x Films for Coated Conductor Applications (Postprint)

    DTIC Science & Technology

    2010-01-01

    Goyal , A. , Maroni , V.A. , Chen , Y. , and Selvamanickam , V. ( 2009 ) Supercond. Sci. Technol. , 22 , 015008 . 6 Malozemoff , P ...in YBCO+BSO fi lms in this direction. 5.4.2 Current Density and Alpha Value Variations with Temperature, and Dual Peaks in F p Plots of YBCO...fi lms, showing values as high as 18 GN cm − 3 at 77 K for a 300 nm thick fi lm (Figure 5.7 ). Flux pinning force maxima ( F p max ) higher

  4. Panel sees limited interest in compact nukes

    SciTech Connect

    Not Available

    1983-11-01

    Participants in the Joint Power Generation conference thought compact (200- to 300-MW) nuclear reactors would be useful to developing countries, but only the Canadians showed interest in becoming suppliers. Others said they would simply downsize existing designs. A 300-MW mini-Candu that can be built in 48 months will use proven components and have the same price tag as a full-sized unit. A market may develop in the future in the US and other industrialized countries for low-temperature heat sources. Another 5 to 10 developing countries would likely join the 7 now using nuclear power. (DCK)

  5. 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.

  6. DFVLR/FAA (Deutsche Forschungs-und Versuchsanstalt fuer Luft und Raumfahrt/Federal Aviation Administration) Propeller Noise Tests in the German-Dutch Wind Tunnel DNW. Appendix V. The Effect of Propeller Disc-Plane Attitude (Propeller 2: Thickness 8.5%, Square Tip-Shape),

    DTIC Science & Technology

    1986-01-01

    100 PlX 1. ul -100 cl -200 0L a- -300 -400 -i PMIN= -340.2 -500 1 .0 .5 1.0 TIME - REV. 120 AVERAGE (70) P IOWER SPECTRUM OF= 11 .2 Hz 110 00 0...268 4: 3.60 T: 288.6 K, AVERAGE (68) TIME HISTOPY (AP < 56 %) PMAX= 60.9 50 -- ,’-qJ .. 50 TIME- 0 ul -50 Lu a., -,,ɜ - Io -200 r18 . .0 .5 1.0 TIME

  7. Annual Report on Electronics Research at The University of Texas at Austin.

    DTIC Science & Technology

    1982-05-15

    Ratliff and M. Fink, " Measurements and Calculations of the Anomalous Energy Broadening of a 300 eV Electron Beam," J. App. Phys. 52, 7039-7043 (1981...J.W. Keto and Michael H. Proffitt, "Diatom Polarizabilities from New Measurements of Collision-Induced Raman Spectra of the Noble Gases," J. Can...Frequency Fluctuation Measurements in the Central Cell of TMX." Y.C. Kim, T.P. Kochanski, L. Khadra, R.F. Gandy, E.J. Powers and R.D. Bengtson

  8. Improved electromechanical behavior in castable dielectric elastomer actuators

    NASA Astrophysics Data System (ADS)

    Akbari, Samin; Rosset, Samuel; Shea, Herbert R.

    2013-02-01

    Non-viscoelastic castable elastomers are replacing the polyacrylate VHB films in the new generations of dielectric elastomer actuators (DEAs) to achieve fast and reliable actuation. We introduce the optimum prestretch conditions to enhance the electromechanical behavior of the castable DEAs resulting in large actuation strain. For castable actuator in which the thickness is selected independent of the prestretch, uniaxial prestretch mode offers the highest actuation strain in the transverse direction compared to biaxial and pure shear. We experimentally demonstrate that miniaturization hinders the loss of tension and up to 85% linear actuation strain is generated with a 300 × 300 μm2 polydimethylsiloxanes-based DEA.

  9. 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.

  10. Late Maastrichtian and Danian ostracode faunas from northern Alaska: reconstructions of environment and paleogeography

    USGS Publications Warehouse

    Brouwers, E.M.; De Deckker, P.

    1993-01-01

    A 300-m sequence of well-exposed fossiliferous outcrops in bluffs along the Colville River, northern Aslaska, has yielded diverse, well-preserved Maastrichtian and Danian ostracode assemblages. The Maastrichtian strata are nonmarine flood-plain deposits and contain diverse terrestrial and aquatic fossils. The Danian strata are predominantly marginal-marine and shallow-marine and include an abundant and diverse invertebrate fauna. During the Maastrichtian and early Palaeocene, polar terrestrial and marine assemblages consisted predominantly of endemic organisms that were adapted to the cool temperatures, seasonal low light conditions, and geographic isolation characteristic of northern high-latitude environments. -from Authors

  11. Applications of Fluorescence Spectroscopy to Environmental Chemistry

    DTIC Science & Technology

    1992-06-01

    1978-1981. (42), Flannery (43), Szabo (26), Eads et al. (37)) (Figure (23) Milne, P. J.; Odem. D. S.;, Zika , R. G. In Photochemistry 7). At t - 0...corresponding to the absorption of a photon of Environmental Aquatic Systems; Zika , R. G., Cooper, by the fluorophore, the concentration of neutral...00 o) CDC 00 It0 (6 6i 1 UJ ’(OOO)sqo 58 fig. 5. Absorption coefficients (a(300)) vs longitude for sprlnig(x) and fall (0) samples. 59 I____ __I I_

  12. Dicke coherent narrowing in two-photon and Raman spectroscopy of thin vapor cells

    SciTech Connect

    Dutier, Gabriel; Todorov, Petko; Hamdi, Ismahene; Maurin, Isabelle; Saltiel, Solomon; Bloch, Daniel; Ducloy, Martial

    2005-10-15

    The principle of coherent Dicke narrowing in a thin vapor cell, in which sub-Doppler spectral line shapes are observed under a normal irradiation for a {lambda}/2 thickness, is generalized to two-photon spectroscopy. Only the sum of the two wave vectors must be normal to the cell, making the two-photon scheme highly versatile. A comparison is provided between the Dicke narrowing with copropagating fields, and the residual Doppler broadening occurring with counterpropagating geometries. The experimental feasibility is discussed on the basis of a first observation of a two-photon resonance in a 300-nm-thick Cs cell. Extension to the Raman situation is finally considered.

  13. 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.

  14. Atomic Mass and Nuclear Binding Energy for Fm-300 (Fermium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Fm-300 (Fermium, atomic number Z = 100, mass number A = 300).

  15. Design of a large-scale CFB boiler

    SciTech Connect

    Darling, S.; Li, S.

    1997-12-31

    Many CFB boilers sized 100--150 MWe are in operation, and several others sized 150--250 MWe are in operation or under construction. The next step for CFB technology is the 300--400 MWe size range. This paper will describe Foster Wheeler`s large-scale CFB boiler experience and the design for a 300 MWe CFB boiler. The authors will show how the design incorporates Foster Wheeler`s unique combination of extensive utility experience and CFB boiler experience. All the benefits of CFB technology which include low emissions, fuel flexibility, low maintenance and competitive cost are now available in the 300--400 MWe size range.

  16. 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.

  17. 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.

  18. Atomic Mass and Nuclear Binding Energy for Mt-300 (Meitnerium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Mt-300 (Meitnerium, atomic number Z = 109, mass number A = 300).

  19. Oriented strand board feasibility study for Venezuelan production. Export trade information

    SciTech Connect

    1995-08-01

    This study, conducted by Wallace Industrial Constructors, was funded by the U.S. Trade and Development Agency. The report shows the results of a feasibility study done as a joint venture with Delfino Group to design, build and operate and market a 300 million square foot Oriented Strand Board facility. The report covers the technical process of making the product, as well as enviromental considerations and impact. The study id divided into the following sections: Introduction and Executive Summary: (1) Schenck/Drawings; (2) Sensitivites; (3)Historical Summary A; (4) Historical Summary B; (5) Guss Report 5/94; (6) Stoddard Report; (7) WA State Study; (8) Waferboard Pricing.

  20. History of the Army Ground Forces. Study Number 13. Activation and Early Training of ’D’ Division

    DTIC Science & Technology

    1948-06-30

    headquarters. The tests con- sisted of push-ups; a 300-yard run; burpees , a 75 yard pig-a-back run in which each participant carried a man of approximately...CONTENTS,. Page Prefatory Note I - Preactivation Period, 1 `-Act ivation. 10 >Basic Training. 11 The NP Test , 17 ’ýUnit Training, 24 K:,Platoon...Profioiency Test , 25 --The Special Battle Courses 29 .-.(Infiltration, Combat-in-Cities, Close Combat), "PReorgainzation under T/0&0 dated 15 July 1943, 36

  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. New Nanoscale Imaging with a Simple Hard X-Ray Nanoslit

    SciTech Connect

    Takano, H.; Hashimoto, T.; Tsusaka, Y.; Kagoshima, Y.; Tsuji, T.; Koyama, T.

    2011-09-09

    A simple and new procedure to measure the optimal intensity distribution of an x-ray wavefield in nanoscale resolution is proposed. A heavy-metal wire can work as a ''nanoslit'' with a nanoscale aperture size. Its basic function can be described simply with geometrical optics using total reflection. The further function is investigated with numerical calculation of a diffraction edge. In the experiment, Fresnel fringes generated by a rectangular aperture were measured by using a 300-{mu}m platinum wire as the nanoslit. Its high potential use in imaging applications is discussed.

  3. Enhanced detection limit by dark mode perturbation in 2D photonic crystal slab refractive index sensors.

    PubMed

    Nicolaou, Costa; Lau, Wah Tung; Gad, Raanan; Akhavan, Hooman; Schilling, Ryan; Levi, Ofer

    2013-12-16

    We demonstrate for the first time a 300nm thick, 300μm × 300μm 2D dielectric photonic crystal slab membrane with a quality factor of 10,600 by coupling light to slightly perturbed dark modes through alternating nano-hole sizes. The newly created fundamental guided resonances greatly reduce nano-fabrication accuracy requirements. Moreover, we created a new layer architecture resulting in electric field enhancement at the interface between the slab and sensing regions, and spectral sensitivity of >800 nm/RIU, that is, >0.8 of the single-mode theoretical upper limit of spectral sensitivity.

  4. Foreign Object Damage by Steel Ball Projectiles in a SiC/SiC Ceramic Matrix Composite at Ambient and Elevated Temperatures

    DTIC Science & Technology

    2008-04-29

    Hardened (HRC≥60) chrome steel balls with a diameter of 1.59 mm were inserted into a 300-mm long gun barrel with an inner diameter of 1.59 mm. A...b) 1316°C NAWCADPAX/TR-2008/3 12 completely separated from the specimen. The specimen was in 2-mm thick disk and subjected to 1.59-mm steel ...REPORT NO: NAWCADPAX/TR-2008/3 FOREIGN OBJECT DAMAGE BY STEEL BALL PROJECTILES IN A SiC/SiC CERAMIC MATRIX COMPOSITE AT AMBIENT

  5. Diaphragm Stirling cryocooler developments

    NASA Technical Reports Server (NTRS)

    Stacy, W. D.

    1992-01-01

    This paper reports on the status of several ongoing development programs aimed at the demonstration of diaphragm Stirling cycle cryocooler performance. Key attributes of this technology focus on long reliable operating life and excellent efficiency, making it a candidate for cooling of satellite-borne long wavelength sensors for astrophysics and earth observing missions. Three programs are described, each leading to system or component test hardware: a 2 W 65 K single-stage Standard Spacecraft Cryocooler, a 300 mW 30 K two-stage cooler and a 200 mW 4-20 K single-stage cooler. Design features are described, and breadboard experimental data are presented.

  6. Monitoring crack extension in fracture toughness tests by ultrasonics

    NASA Technical Reports Server (NTRS)

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

    1976-01-01

    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. 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.

  8. 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.

  9. Integrated heterodyne interferometer with on-chip modulators and detectors.

    PubMed

    Cole, David B; Sorace-Agaskar, Cheryl; Moresco, Michele; Leake, Gerald; Coolbaugh, Douglas; Watts, Michael R

    2015-07-01

    We demonstrate, to our knowledge, the first on-chip heterodyne interferometer fabricated on a 300-mm CMOS compatible process that exhibits root-mean-square (RMS) position noise on the order of 2 nm. Measuring 1 mm by 6 mm, the interferometer is also, to our knowledge, the smallest heterodyne interferometer demonstrated to date and will surely impact numerous interferometric and metrology applications, including displacement measurement, laser Doppler velocimetry and vibrometry, Fourier transform spectroscopy, imaging, and light detection and ranging (LIDAR). Here we present preliminary results that demonstrate the displacement mode.

  10. 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.

  11. Atomic Mass and Nuclear Binding Energy for Md-300 (Mendelevium)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Md-300 (Mendelevium, atomic number Z = 101, mass number A = 300).

  12. ESTABLISHING FINAL END STATE FOR A RETIRED NUCLEAR WEAPONS PRODUCTION REACTOR; COLLABORATION BETWEEN STAKEHOLDERS, REGULATORS AND THE FEDERAL GOVERNMENT

    SciTech Connect

    Bergren, C

    2009-01-16

    The Savannah River Site (SRS) is a 310-square-mile United States Department of Energy nuclear facility located along the Savannah River (SRS) near Aiken, South Carolina. Nuclear weapons material production began in the early 1950s, utilizing five production reactors. In the early 1990s all SRS production reactor operations were terminated. The first reactor closure end state declaration was recently institutionalized in a Comprehensive Environmental Response and Compensation and Liability Act (CERCLA) Early Action Record of Decision. The decision for the final closure of the 318,000 square foot 105-P Reactor was determined to be in situ decommissioning (ISD). ISD is an acceptable and cost effective alternative to off-site disposal for the reactor building, which will allow for consolidation of remedial action wastes generated from other cleanup activities within the P Area. ISD is considered protective by the regulators, U. S. Environmental Protection Agency (US EPA) and the South Carolina Department of Health and Environmental Control (SCDHEC), public and stakeholders as waste materials are stabilized/immobilized, and radioactivity is allowed to naturally decay, thus preventing future exposure to the environment. Stakeholder buy-in was critical in the upfront planning in order to achieve this monumental final decision. Numerous public meetings and workshops were held in two different states (covering a 200 mile radius) with stakeholder and SRS Citizens Advisory Board participation. These meetings were conducted over an eight month period as the end state decision making progressed. Information provided to the public evolved from workshop to workshop as data became available and public input from the public meetings were gathered. ISD is being considered for the balance of the four SRS reactors and other hardened facilities such as the chemical processing canyons.

  13. Solution structure of the isolated histone H2A-H2B heterodimer

    PubMed Central

    Moriwaki, Yoshihito; Yamane, Tsutomu; Ohtomo, Hideaki; Ikeguchi, Mitsunori; Kurita, Jun-ichi; Sato, Masahiko; Nagadoi, Aritaka; Shimojo, Hideaki; Nishimura, Yoshifumi

    2016-01-01

    During chromatin-regulated processes, the histone H2A-H2B heterodimer functions dynamically in and out of the nucleosome. Although detailed crystal structures of nucleosomes have been established, that of the isolated full-length H2A-H2B heterodimer has remained elusive. Here, we have determined the solution structure of human H2A-H2B by NMR coupled with CS-Rosetta. H2A and H2B each contain a histone fold, comprising four α-helices and two β-strands (α1–β1–α2–β2–α3–αC), together with the long disordered N- and C-terminal H2A tails and the long N-terminal H2B tail. The N-terminal αN helix, C-terminal β3 strand, and 310 helix of H2A observed in the H2A-H2B nucleosome structure are disordered in isolated H2A-H2B. In addition, the H2A α1 and H2B αC helices are not well fixed in the heterodimer, and the H2A and H2B tails are not completely random coils. Comparison of hydrogen-deuterium exchange, fast hydrogen exchange, and {1H}-15N hetero-nuclear NOE data with the CS-Rosetta structure indicates that there is some conformation in the H2A 310 helical and H2B Lys11 regions, while the repression domain of H2B (residues 27–34) exhibits an extended string-like structure. This first structure of the isolated H2A-H2B heterodimer provides insight into its dynamic functions in chromatin. PMID:27181506

  14. 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. 

  15. 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

  16. Crystal structures and inhibitor identification for PTPN5, PTPRR and PTPN7: a family of human MAPK-specific protein tyrosine phosphatases

    PubMed Central

    Eswaran, Jeyanthy; von Kries, Jens Peter; Marsden, Brian; Longman, Emma; Debreczeni, Judit É.; Ugochukwu, Emilie; Turnbull, Andrew; Lee, Wen Hwa; Knapp, Stefan; Barr, Alastair J.

    2006-01-01

    Protein tyrosine phosphatases PTPN5, PTPRR and PTPN7 comprise a family of phosphatases that specifically inactivate MAPKs (mitogen-activated protein kinases). We have determined high-resolution structures of all of the human family members, screened them against a library of 24000 compounds and identified two classes of inhibitors, cyclopenta[c]quinolinecarboxylic acids and 2,5-dimethylpyrrolyl benzoic acids. Comparative structural analysis revealed significant differences within this conserved family that could be explored for the design of selective inhibitors. PTPN5 crystallized, in two distinct crystal forms, with a sulphate ion in close proximity to the active site and the WPD (Trp-Pro-Asp) loop in a unique conformation, not seen in other PTPs, ending in a 310-helix. In the PTPN7 structure, the WPD loop was in the closed conformation and part of the KIM (kinase-interaction motif) was visible, which forms an N-terminal aliphatic helix with the phosphorylation site Thr66 in an accessible position. The WPD loop of PTPRR was open; however, in contrast with the structure of its mouse homologue, PTPSL, a salt bridge between the conserved lysine and aspartate residues, which has been postulated to confer a more rigid loop structure, thereby modulating activity in PTPSL, does not form in PTPRR. One of the identified inhibitor scaffolds, cyclopenta[c]quinoline, was docked successfully into PTPRR, suggesting several possibilities for hit expansion. The determined structures together with the established SAR (structure–activity relationship) propose new avenues for the development of selective inhibitors that may have therapeutic potential for treating neurodegenerative diseases in the case of PTPRR or acute myeloblastic leukaemia targeting PTPN7. PMID:16441242

  17. ESTABLISHING FINAL END STATE FOR A RETIRED NUCLEAR WEAPONS PRODUCTION REACTOR; COLLABORATION BETWEEN STAKEHOLDERS, REGULATORS, AND THE FEDERAL GOVERNMENT - 11052

    SciTech Connect

    Bergren, C.; Flora, M.; Belencan, H.

    2010-11-17

    The Savannah River Site (SRS) is a 310-square-mile United States Department of Energy nuclear facility located along the Savannah River (SRS) near Aiken, South Carolina. Nuclear weapons material production began in the early 1950s, utilizing five production reactors. In the early 1990s all SRS production reactor operations were terminated. The first reactor closure end state declaration was recently institutionalized in a Comprehensive Environmental Response and Compensation and Liability Act (CERCLA) Early Action Record of Decision. The decision for the final closure of the 318,000 square foot 105-P Reactor was determined to be in situ decommissioning (ISD). ISD is an acceptable and cost effective alternative to off-site disposal for the reactor building, which will allow for consolidation of remedial action wastes generated from other cleanup activities within the P Area. ISD is considered protective by the regulators, U. S. Environmental Protection Agency (US EPA) and the South Carolina Department of Health and Environmental Control (SCDHEC), public and stakeholders as waste materials are stabilized/immobilized, and radioactivity is allowed to naturally decay, thus preventing future exposure to the environment. Stakeholder buy-in was critical in the upfront planning in order to achieve this monumental final decision. Numerous public meetings and workshops were held in two different states (covering a 200 mile radius) with stakeholder and SRS Citizens Advisory Board participation. These meetings were conducted over an eight month period as the end state decision making progressed. Information provided to the public evolved from workshop to workshop as data became available and public input from the public meetings were gathered. ISD is being considered for the balance of the four SRS reactors and other hardened facilities such as the chemical Separation Facilities (canyons).

  18. The Mechanism of Voltage Dependent Gating of the NaChBac Prokaryotic Sodium Channel

    NASA Astrophysics Data System (ADS)

    Decaen, Paul G.

    Electrical signaling in cells depends on selective conductance of ions through membrane proteins called 'voltage gated ion channels'. These channels are characterized by their ability turn on and off the flow of ionic current by opening and closing their conductive pore in response to changes in membrane potential. The opening and closing of the pore is a mechanically linked to conformational movement of the positively charged fourth transmembrane segment (S4) in 'the voltage sensor' region. How the S4 moves in response to membrane potential is a controversial subject. In this thesis, we used the prokaryotic sodium channel NaChBac as our model sodium channel to study voltage dependent movement of the S4 in the voltage sensor. We use a disulfide-locking method where we introduced pairs of cysteines in the voltage sensor that crosslink and trap the S4 in its path after depolarization. We screened over one hundred mutations of the NaChBac channel in the whole cell patch clamp assay and demonstrated discrete and sequential voltage dependent ion pair interactions that occur in at least three states between the positively charged residues of the S4 segment and the acidic residues in the S1, S2 and S3 segments. In conjunction with structural modeling of the voltage sensor and our disulfide locking data, we propose that the S4 moves in and out of the plane of the membrane 8-13 A, forming distinct gating charge interactions with counter charges of the voltage sensor and adopts a 310 helix over a portion of its structure during activation. These findings are compatible with the sliding helix model and refine our understanding of the structural determinates of voltage sensor function in voltage gated ion channels.

  19. Tire footprint studies

    NASA Astrophysics Data System (ADS)

    Chawla, Mangal; Medzorian, John

    1995-08-01

    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.

  20. Exploring the Mechanism Responsible for Cellulase Thermostability by Structure-Guided Recombination.

    PubMed

    Chang, Chia-Jung; Lee, Cheng-Chung; Chan, Yueh-Te; Trudeau, Devin L; Wu, Mei-Huey; Tsai, Chih-Hsuan; Yu, Su-May; Ho, Tuan-Hua David; Wang, Andrew H-J; Hsiao, Chwan-Deng; Arnold, Frances H; Chao, Yu-Chan

    2016-01-01

    Cellulases from Bacillus and Geobacillus bacteria are potentially useful in the biofuel and animal feed industries. One of the unique characteristics of these enzymes is that they are usually quite thermostable. We previously identified a cellulase, GsCelA, from thermophilic Geobacillus sp. 70PC53, which is much more thermostable than its Bacillus homolog, BsCel5A. Thus, these two cellulases provide a pair of structures ideal for investigating the mechanism regarding how these cellulases can retain activity at high temperature. In the present study, we applied the SCHEMA non-contiguous recombination algorithm as a novel tool, which assigns protein sequences into blocks for domain swapping in a way that lessens structural disruption, to generate a set of chimeric proteins derived from the recombination of GsCelA and BsCel5A. Analyzing the activity and thermostability of this designed library set, which requires only a limited number of chimeras by SCHEMA calculations, revealed that one of the blocks may contribute to the higher thermostability of GsCelA. When tested against swollen Avicel, the highly thermostable chimeric cellulase C10 containing this block showed significantly higher activity (22%-43%) and higher thermostability compared to the parental enzymes. With further structural determinations and mutagenesis analyses, a 310 helix was identified as being responsible for the improved thermostability of this block. Furthermore, in the presence of ionic calcium and crown ether (CR), the chimeric C10 was found to retain 40% residual activity even after heat treatment at 90°C. Combining crystal structure determinations and structure-guided SCHEMA recombination, we have determined the mechanism responsible for the high thermostability of GsCelA, and generated a novel recombinant enzyme with significantly higher activity.

  1. 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 Central

    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. PMID:28182711

  2. 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.

  3. 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.

  4. 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.

  5. 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 in 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.

  6. 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.

  7. 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

  8. 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.

  9. Evaluation of a rapid method of extracting DNA from stool samples for use in hybridization assays.

    PubMed Central

    Coll, P; Phillips, K; Tenover, F C

    1989-01-01

    The ability of the Extractor system (Molecular Biosystems, Inc., San Diego, Calif.) to isolate nucleic acid (NA) from stool samples for use in hybridization assays was investigated. Crude NA was recovered from 45 of 50 stool samples by using this system. The amount of NA recovered varied considerably depending on the microbial flora present in the sample (mean +/- standard deviation, 50.2 +/- 46.7 micrograms; range, 2 to 228 micrograms) but did not correlate with the consistency of the sample. Samples containing primarily gram-positive organisms or yeast cells gave lower yields of NA (less than 10 micrograms) than those containing gram-negative bacilli. The five samples which did not yield NA were sterile when cultured aerobically on blood agar plates. Samples of the 45 stools yielding NA were inoculated into broth and grown overnight, and a 10-microliters sample of broth was spotted onto nitrocellulose filters. The NA samples recovered from the Extractor column were applied to nylon membranes by using the Centri-dot system. The NA on the broth blots and the NA on the Centri-dot filters were hybridized with a 310-base-pair probe specific for the 2"-O-aminoglycoside adenylyltransferase [ANT(2")] resistance gene. The Extractor-Centri-dot system demonstrated 61.9% sensitivity and 95.8% specificity in detecting the ANT(2") gene in stool samples containing colonies demonstrating the ANT(2") phenotype. The positive and negative predictive values of the NA blot were 92.8 and 74.2%, respectively. PMID:2584376

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

    PubMed Central

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

    2016-01-01

    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. PMID:27986792

  11. 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.

  12. 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.

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

    SciTech Connect

    Rodionova, Irina A.; Zuccola, Harmon J.; Sorci, Leonardo; Aleshin, Alexander E.; Kazanov, Marat D.; Ma, Chen -Ting; Sergienko, Eduard; Rubin, Eric J.; Locher, Christopher P.; Osterman, Andrei L.

    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 the 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 (MIC80) ~ 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.

  14. 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 the structuralmore » 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 (MIC80) ~ 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

  15. Mature HIV-1 capsid structure by cryo-electron microscopy and all-atom molecular dynamics.

    PubMed

    Zhao, Gongpu; Perilla, Juan R; Yufenyuy, Ernest L; Meng, Xin; Chen, Bo; Ning, Jiying; Ahn, Jinwoo; Gronenborn, Angela M; Schulten, Klaus; Aiken, Christopher; Zhang, Peijun

    2013-05-30

    Retroviral capsid proteins are conserved structurally but assemble into different morphologies. The mature human immunodeficiency virus-1 (HIV-1) capsid is best described by a 'fullerene cone' model, in which hexamers of the capsid protein are linked to form a hexagonal surface lattice that is closed by incorporating 12 capsid-protein pentamers. HIV-1 capsid protein contains an amino-terminal domain (NTD) comprising seven α-helices and a β-hairpin, a carboxy-terminal domain (CTD) comprising four α-helices, and a flexible linker with a 310-helix connecting the two structural domains. Structures of the capsid-protein assembly units have been determined by X-ray crystallography; however, structural information regarding the assembled capsid and the contacts between the assembly units is incomplete. Here we report the cryo-electron microscopy structure of a tubular HIV-1 capsid-protein assembly at 8 Å resolution and the three-dimensional structure of a native HIV-1 core by cryo-electron tomography. The structure of the tubular assembly shows, at the three-fold interface, a three-helix bundle with critical hydrophobic interactions. Mutagenesis studies confirm that hydrophobic residues in the centre of the three-helix bundle are crucial for capsid assembly and stability, and for viral infectivity. The cryo-electron-microscopy structures enable modelling by large-scale molecular dynamics simulation, resulting in all-atom models for the hexamer-of-hexamer and pentamer-of-hexamer elements as well as for the entire capsid. Incorporation of pentamers results in closer trimer contacts and induces acute surface curvature. The complete atomic HIV-1 capsid model provides a platform for further studies of capsid function and for targeted pharmacological intervention.

  16. UTILIZING THE RIGHT MIX OF ENVIRONMENTAL CLEANUP TECHNOLOGIES

    SciTech Connect

    Bergren, C; Wade Whitaker, W; Mary Flora, M

    2007-05-25

    The Savannah River Site (SRS) Figure 1 is a 310-square-mile United States Department of Energy nuclear facility located along the Savannah River near Aiken, South Carolina. During operations, which started in 1951, hazardous substances (chemicals and radionuclides) were released to the environment. The releases occurred as a result of inadvertent spills and waste disposal in unlined pits and basins which was common practice before environmental regulations existed. The hazardous substances have migrated to the vadose zone and groundwater in many areas of the SRS, resulting in 515 waste units that are required by environmental regulations, to undergo characterization and, if needed, remediation. In the initial years of the SRS environmental cleanup program (early 1990s), the focus was to use common technologies (such as pump and treat, air stripping, excavation and removal) that actively and tangibly removed contamination. Exclusive use of these technologies required continued and significant funding while often failing to meet acceptable clean-up goals and objectives. Recognizing that a more cost-effective approach was needed, SRS implemented new and complementary remediation methods focused on active and passive technologies targeted to solve specific remediation problems. Today, SRS uses technologies such as chemical/pH-adjusting injection, phytoremediation, underground cutoff walls, dynamic underground stripping, soil fracturing, microbial degradation, baroballs, electrical resistance heating, soil vapor extraction, and microblowers to more effectively treat contamination at lower costs. Additionally, SRS's remediation approach cost effectively maximizes cleanup as SRS works proactively with multiple regulatory agencies. Using GIS, video, animation, and graphics, SRS is able to provide an accurate depiction of the evolution of SRS groundwater and vadose zone cleanup activities to convince stakeholders and regulators of the effectiveness of various cleanup

  17. Specific Interaction of the Transcription Elongation Regulator TCERG1 with RNA Polymerase II Requires Simultaneous Phosphorylation at Ser2, Ser5, and Ser7 within the Carboxyl-terminal Domain Repeat*

    PubMed Central

    Liu, Jiangxin; Fan, Shilong; Lee, Chul-Jin; Greenleaf, Arno L.; Zhou, Pei

    2013-01-01

    The human transcription elongation regulator TCERG1 physically couples transcription elongation and splicing events by interacting with splicing factors through its N-terminal WW domains and the hyperphosphorylated C-terminal domain (CTD) of RNA polymerase II through its C-terminal FF domains. Here, we report biochemical and structural characterization of the C-terminal three FF domains (FF4–6) of TCERG1, revealing a rigid integral domain structure of the tandem FF repeat that interacts with the hyperphosphorylated CTD (PCTD). Although FF4 and FF5 adopt a classical FF domain fold containing three orthogonally packed α helices and a 310 helix, FF6 contains an additional insertion helix between α1 and α2. The formation of the integral tandem FF4–6 repeat is achieved by merging the last helix of the preceding FF domain and the first helix of the following FF domain and by direct interactions between neighboring FF domains. Using peptide column binding assays and NMR titrations, we show that binding of the FF4–6 tandem repeat to the PCTD requires simultaneous phosphorylation at Ser2, Ser5, and Ser7 positions within two consecutive Y1S2P3T4S5P6S7 heptad repeats. Such a sequence-specific PCTD recognition is achieved through CTD-docking sites on FF4 and FF5 of TCERG1 but not FF6. Our study presents the first example of a nuclear factor requiring all three phospho-Ser marks within the heptad repeat of the CTD for high affinity binding and provides a molecular interpretation for the biochemical connection between the Ser7 phosphorylation enrichment in the CTD of the transcribing RNA polymerase II over introns and co-transcriptional splicing events. PMID:23436654

  18. 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.

  19. 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.

  20. High resolution 17 keV to 75 keV backlighters for High Energy Density experiments

    SciTech Connect

    Park, H; Maddox, B R; Giraldez, E; Hatchett, S P; Hudson, L; Izumi, N; Key, M H; Pape, S L; MacKinnon, A J; MacPhee, A G; Patel, P K; Phillips, T W; Remington, B A; Seely, J F; Tommasini, R; Town, R; Workman, J

    2008-02-25

    We have developed 17 keV to 75 keV 1-dimensional and 2-dimensional high-resolution (< 10 {micro}m) radiography using high-intensity short pulse lasers. High energy K-{alpha} sources are created by fluorescence from hot electrons interacting in the target material after irradiation by lasers with intensity I{sub L} > 10{sup 17} W/cm{sup 2}. We have achieved high resolution point projection 1-dimensional and 2-dimensional radiography using micro-foil and micro-wire targets attached to low-Z substrate materials. The micro-wire size was 10 {micro}m x 10 {micro}m x 300 {micro}m on a 300 {micro}m x 300 {micro}m x 5 {micro}m CH substrate. The radiography performance was demonstrated using the Titan laser at LLNL. We observed that the resolution is dominated by the micro-wire target size and there is very little degradation from the plasma plume, implying that the high energy x-ray photons are generated mostly within the micro-wire volume. We also observe that there are enough K{alpha} photons created with a 300 J, 1-{omega}, 40 ps pulse laser from these small volume targets, and that the signal-to-noise ratio is sufficiently high, for single shot radiography experiments. This unique technique will be used on future high energy density (HED) experiments at the new Omega-EP, ZR and NIF facilities.

  1. Spectroscopic Measurements of Impurity Spectra on the EAST Tokamak

    NASA Astrophysics Data System (ADS)

    Fu, Jia; Li, Yingying; Shi, Yuejiang; Wang, Fudi; Zhang, Wei; Lv, Bo; Huang, Juan; Wan, Baonian; Zhou, Qian

    2012-12-01

    Ultraviolet (UV) and visible impurity spectra (200~750 nm) are commonly used to study plasma and wall interactions in magnetic fusion plasmas. Two optical multi-channel analysis (OMA) systems have been installed for the UV-visible spectrum measurement on EAST. These two OMA systems are both equipped with the Czerny-Turner (C-T) type spectrometer. The upper vacuum vessel and inner divertor baffle can be viewed simultaneously through two optical lenses. The OMA1 system is mainly used for multi-impurity lines radiation measurement. A 280 nm wavelength range can be covered by a 300 mm focal length spectrometer equipped with a 300 grooves/mm grating. The Dα/Hα line shapes can be resolved by the OMA2 system. The focal length is 750 mm. The spectral resolution can be up to 0.01 nm using a 1800 grooves/mm grating. The impurity behaviour and hydrogen ratio evolution after boroniztion, lithium coating, and siliconization are compared. Lithium coating has shown beneficial effects on the reduction of edge recycling and low Z impurity (C, O) influx. The impurity expelling effect of the divertor configuration is also briefly discussed through multi-channels observation of OMA1 system.

  2. 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.

  3. High-resolution electron microscopy of advanced materials

    SciTech Connect

    Mitchell, T.E.; Kung, H.H.; Sickafus, K.E.; Gray, G.T. III; Field, R.D.; Smith, J.F.

    1997-11-01

    This final report chronicles a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The High-Resolution Electron Microscopy Facility has doubled in size and tripled in quality since the beginning of the three-year period. The facility now includes a field-emission scanning electron microscope, a 100 kV field-emission scanning transmission electron microscope (FE-STEM), a 300 kV field-emission high-resolution transmission electron microscope (FE-HRTEM), and a 300 kV analytical transmission electron microscope. A new orientation imaging microscope is being installed. X-ray energy dispersive spectrometers for chemical analysis are available on all four microscopes; parallel electron energy loss spectrometers are operational on the FE-STEM and FE-HRTEM. These systems enable evaluation of local atomic bonding, as well as chemical composition in nanometer-scale regions. The FE-HRTEM has a point-to-point resolution of 1.6 {angstrom}, but the resolution can be pushed to its information limit of 1 {angstrom} by computer reconstruction of a focal series of images. HRTEM has been used to image the atomic structure of defects such as dislocations, grain boundaries, and interfaces in a variety of materials from superconductors and ferroelectrics to structural ceramics and intermetallics.

  4. Liquid / liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N',N'-diethylphenylenediamine) / water (electrolyte) interface at graphite and mesoporous TiO2 substrates.

    PubMed

    Stott, Susan J; McKenzie, Katy J; Mortimer, Roger J; Hayman, Colin M; Buckley, Benjamin R; Bulman Page, Philip C; Marken, Frank; Shul, Galyna; Opallo, Marcin

    2004-09-15

    Biphasic electrode systems are studied for the case of the oxidation of the water-insoluble liquid N,N-didodecyl-N',N'-diethylphenylenediamine (DDPD) neat and dissolved in bis(2-ethylhexyl) phosphate (HDOP) and immersed in aqueous electrolyte media. The oxidation process in the absence of HDOP is accompanied by transfer of the anion (perchlorate or phosphate) from the water into the organic phase. However, in the presence of HDOP, oxidation is accompanied by proton exchange instead. This electrochemically driven proton exchange process occurs over a wide pH range. Organic microdroplet deposits of DDPD in HDOP at basal plane pyrolytic graphite electrodes are studied by voltammetric techniques and compared in their behavior to organic microphase deposits in mesoporous TiO2 thin films. The mesoporous TiO2 thin film acts as a host for the organic liquid and provides an alternative biphasic electrode system compared to the random microdroplet/graphite system. Two types of mesoporous TiO2 thin-film electrodes, (i) a 300-400-nm film on ITO and (ii) a 300-400-nm film on ITO sputter-coated with a 20-nm porous gold layer, are investigated.

  5. 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.

  6. 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.

  7. Plasmonic nanomesh sandwiches for ultrathin film silicon solar cells

    NASA Astrophysics Data System (ADS)

    Gao, Tongchuan; Wang, Baomin; Leu, Paul W.

    2017-02-01

    We theoretically investigate the strategy of integrating metal nanoparticles (NPs)/nanomeshes (NMs) into the top and/or bottom of crystalline silicon (c-Si) thin film solar cells for light trapping and enhanced carrier collection. C-Si thin films exhibit absorption resonances corresponding to Fabry-Pérot modes. Frontside metal NPs enhance absorption by additionally coupling light into localized surface plasmon resonances and c-Si waveguide modes, while a frontside metal NM increases absorption by coupling light into surface plasmon polaritons and c-Si waveguide modes. The frontside metal NM also functions as a flexible top electrode, which may replace conventional brittle transparent conductive oxide thin films. The backside metal NM exhibits enhanced absorption due to the coupling of light into c-Si waveguide modes and the cavity modes within the holes of metal NM. We illustrate how the optimal metal NM sandwich, consisting of NMs on both sides of a 300 nm thick c-Si with an appropriate antireflection coating (ARC), achieves a 72.9% enhancement in short-circuit current density compared with that of a 300 nm thick c-Si thin film solar cell with 100 nm thick Si3N4 ARC and 300 nm thick Ag back reflector. The current generation in the metal NM sandwich is more in the center of the thin film such that there should be less surface recombination. The uniform current generation throughout the film results in less overall recombination.

  8. 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.

  9. Rapid Sputum Multiplex Detection of the M. tuberculosis Complex (MTBC) and Resistance Mutations for Eight Antibiotics by Nucleotide MALDI-TOF MS

    PubMed Central

    Su, Kang-Yi; Yan, Bo-Shiun; Chiu, Hao-Chieh; Yu, Chong-Jen; Chang, So-Yi; Jou, Ruwen; Liu, Jia-Long; Hsueh, Po-Ren; Yu, Sung-Liang

    2017-01-01

    The increasing incidence of multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis (MTB) adds further urgency for rapid and multiplex molecular testing to identify the MTB complex and drug susceptibility directly from sputum for disease control. A nucleotide matrix-assisted-laser-desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS)-based assay was developed to identify MTB (MTBID panel) and 45 chromosomal mutations for resistance to eight antibiotics (MTBDR panel). We conducted a 300 case trial from outpatients to evaluate this platform. An MTBID panel specifically identified MTB with as few as 10 chromosome DNA copies. The panel was 100% consistent with an acid-fast stain and culture for MTB, nontuberculous mycobacteria, and non-mycobacteria bacteria. The MTBDR panel was validated using 20 known MDR-MTB isolates. In a 64-case double-blind clinical isolates test, the sensitivity and specificity were 83% and 100%, respectively. In a 300-case raw sputum trial, the MTB identification sensitivity in smear-negative cases using MALDI-TOF MS was better than the COBAS assay (61.9% vs. 46.6%). Importantly, the failure rate of MALDI-TOF MS was better than COBAS (11.3% vs. 26.3%). To the best of our knowledge, the test described herein is the only multiplex test that predicts resistance for up to eight antibiotics with both sensitivity and flexibility. PMID:28134321

  10. Molecular genetic defect underlying {alpha}-L-iduronidase pseudodeficiency

    SciTech Connect

    Aronovich, E.L.; Pan, D.; Whitley, C.B.

    1996-01-01

    Mucopolysaccharidosis type I (i.e., Hurler, Hurler-Scheie, and Scheie syndromes) and type II (i.e., Hunter syndrome) are lysosomal storage disorders resulting from {alpha}-L-iduronidase (IDUA) deficiency and iduronate-2-sulfatase (IDS) deficiency, respectively. The a priori probability that both disorders would occur in a single individual is {approximately}1 in 5 billion. Nevertheless, such a proband was referred for whom clinical findings (i.e., a male with characteristic facies, dysostosis multiplex, and mental retardation) and biochemical tests indicated these concomitant diagnoses. Multiple techniques, including automated sequencing of the entire IDS and IDUA coding regions, were employed to unravel the molecular genetic basis of these intriguing observations. The common IDS mutation R468W was identified in the proband, his mother, and his sister, thus explaining their biochemical phenotypes. Additionally, the proband, his sister, and his father were found to be heterozygous for a common IDUA mutation, W402X. Notably, a new IDUA mutation A300T was also identified in the proband, his sister, and his mother, accounting for reduced IDUA activity in these individuals; the asymptomatic sister, whose cells demonstrated normal glycosaminoglycan metabolism, is thus a compound heterozygote for W402X and the new allele. This A300T mutation is the first IDUA pseudodeficiency gene to be elucidated at the molecular level. 37 refs., 7 figs., 3 tabs.

  11. Lower Three Runs Remediation Safety Preparation Strategy - 13318

    SciTech Connect

    Mackay, Alexander; Fryar, Scotty; Doane, Alan

    2013-07-01

    The Savannah River Site (SRS) is a 310-square-mile United States Department of Energy (US DOE) nuclear facility located along the Savannah River near Aiken, South Carolina that contains six primary stream/river systems. The Lower Three Runs Stream (LTR) is one of the primary streams within the site that is located in the southeast portion of the Savannah River Site. It is a large blackwater stream system that originates in the northeast portion of SRS and follows a southerly direction before it enters the Savannah River. During reactor operations, secondary reactor cooling water, storm sewer discharges, and miscellaneous wastewater was discharged and contaminated a 20 mile stretch of Lower Three Runs Stream that narrows and provides a limited buffer of US DOE property along the stream and flood-plain. Based on data collected during the years 2009 and 2010 under American Recovery and Re-investment Act funding, the stream was determined to be contaminated with cesium-137 at levels that exceeded acceptable risk based limits. In agreement with the Environmental Protection Agency and the South Carolina Department of Health and Environmental Control, three areas were identified for remediation [1] (SRNS April 2012). A comprehensive safety preparation strategy was developed for safe execution of the LTR remediation project. Contract incentives for safety encouraged the contractor to perform a complete evaluation of the work and develop an implementation plan to perform the work. The safety coverage was controlled to ensure all work was observed and assessed by one person per work area within the project. This was necessary due to the distances between the fence work and three transects being worked, approximately 20 miles. Contractor Management field observations were performed along with DOE assessments to ensure contractor focus on safe performance of the work. Dedicated ambulance coverage for remote worker work activities was provided. This effort was augmented with

  12. Achieving Accelerated Cleanup of Cesium Contaminated Stream at the Savannah River Site; Collaboration between Stakeholders, Regulators, and the Federal Government - 13182

    SciTech Connect

    Bergren, Chris; Flora, Mary; Socha, Ron; Burch, Joseph; Freeman, Candice; Hennessey, Brian

    2013-07-01

    The Savannah River Site (SRS) is a 310-square-mile United States Department of Energy (US DOE) nuclear facility located along the Savannah River near Aiken, South Carolina that contains six primary stream/river systems. The Lower Three Runs Stream (LTR) is one of the primary streams within the site that is located in the southeast portion of the Savannah River Site and is a large black water stream system that originates in the northeast portion of SRS and follows a southerly direction before it enters the Savannah River. During reactor operations, secondary reactor cooling water, storm sewer discharges, and miscellaneous wastewater was discharged and contaminated a 36 kilometer stretch of Lower Three Runs Stream that narrows providing a limited buffer of US DOE property along the stream and flood plain. Based on data collected during 2009 and 2010 under Recover Act Funding, the stream was determined to be contaminated with cesium-137 at levels that exceeded acceptable risk based limits. As efficiencies were realized within the SRS Recovery Act Program, funding was made available to design, permit and execute remediation of the LTR. This accelerated Project allowed for the remediation of 36 kilometers of LTR in only nine months from inception to completion, contributing significantly to the Foot Print Reduction of SRS. The scope consisted of excavation and disposal of more than 2064 cubic meters of contaminated soil, and installing 11 kilometers of fence and 2,000 signs at 1000 locations. Confirmatory sampling and analysis, and radiological surveying were performed demonstrating that soil concentrations met the cleanup goals. The project completed with a very good safety record considering the harsh conditions including, excessive rain in the early stages of the project, high summer temperatures, swampy terrain, snakes, wild boar, insects and dense vegetation. The regulatory approval process was compressed by over 75% and required significant efforts from SRS

  13. PROJECTIZING AN OPERATING NUCLEAR FACILITY

    SciTech Connect

    Adams, N

    2007-07-08

    This paper will discuss the evolution of an operations-based organization to a project-based organization to facilitate successful deactivation of a major nuclear facility. It will describe the plan used for scope definition, staff reorganization, method estimation, baseline schedule development, project management training, and results of this transformation. It is a story of leadership and teamwork, pride and success. Workers at the Savannah River Site's (SRS) F Canyon Complex (FCC) started with a challenge--take all the hazardous byproducts from nearly 50 years of operations in a major, first-of-its-kind nuclear complex and safely get rid of them, leaving the facility cold, dark, dry and ready for whatever end state is ultimately determined by the United States Department of Energy (DOE). And do it in four years, with a constantly changing workforce and steadily declining funding. The goal was to reduce the overall operating staff by 93% and budget by 94%. The facilities, F Canyon and its adjoined sister, FB Line, are located at SRS, a 310-square-mile nuclear reservation near Aiken, S.C., owned by DOE and managed by Washington Group International subsidiary Washington Savannah River Company (WSRC). These facilities were supported by more than 50 surrounding buildings, whose purpose was to provide support services during operations. The radiological, chemical and industrial hazards inventory in the old buildings was significant. The historical mission at F Canyon was to extract plutonium-239 and uranium-238 from irradiated spent nuclear fuel through chemical processing. FB Line's mission included conversion of plutonium solutions into metal, characterization, stabilization and packaging, and storage of both metal and oxide forms. The plutonium metal was sent to another DOE site for use in weapons. Deactivation in F Canyon began when chemical separations activities were completed in 2002, and a cross-functional project team concept was implemented to successfully

  14. Investigations of two-phase flame propagation under microgravity conditions

    NASA Astrophysics Data System (ADS)

    Gokalp, Iskender

    2016-07-01

    uniformly distributed. Ethanol-air mixtures are used and the experiments are performed under reduced gravity conditions in the Airbus A310 ZERO-G of the CNES, during which a 10-2g gravity level is achieved. The experiments are conducted in a pressure-release type dual chamber which consists of a spherical combustion chamber of 1 L which is centered in a high pressure chamber of 11 L. Propagating flames under various mixture, droplet size and pressure conditions are investigated with various optical techniques. The collected flame images and the deduced flame propagation velocities enabled to establish various flame propagation and cellular instability regimes, mainly depending on the droplet size and droplet density. The experiments also permitted comparisons with gaseous flames having the same global equivalence ratio as the two-phase flames, therefore allowing analyzing clearly the role of the presence of the droplets in the flame propagation process.

  15. A Sco protein among the hypothetical proteins of Bacillus lehensis G1: Its 3D macromolecular structure and association with Cytochrome C Oxidase

    PubMed Central

    2014-01-01

    Background At least a quarter of any complete genome encodes for hypothetical proteins (HPs) which are largely non-similar to other known, well-characterized proteins. Predicting and solving their structures and functions is imperative to aid understanding of any given organism as a complete biological system. The present study highlights the primary effort to classify and cluster 1202 HPs of Bacillus lehensis G1 alkaliphile to serve as a platform to mine and select specific HP(s) to be studied further in greater detail. Results All HPs of B. lehensis G1 were grouped according to their predicted functions based on the presence of functional domains in their sequences. From the metal-binding group of HPs of the cluster, an HP termed Bleg1_2507 was discovered to contain a thioredoxin (Trx) domain and highly-conserved metal-binding ligands represented by Cys69, Cys73 and His159, similar to all prokaryotic and eukaryotic Sco proteins. The built 3D structure of Bleg1_2507 showed that it shared the βαβαββ core structure of Trx-like proteins as well as three flanking β-sheets, a 310 –helix at the N-terminus and a hairpin structure unique to Sco proteins. Docking simulations provided an interesting view of Bleg1_2507 in association with its putative cytochrome c oxidase subunit II (COXII) redox partner, Bleg1_2337, where the latter can be seen to hold its partner in an embrace, facilitated by hydrophobic and ionic interactions between the proteins. Although Bleg1_2507 shares relatively low sequence identity (47%) to BsSco, interestingly, the predicted metal-binding residues of Bleg1_2507 i.e. Cys-69, Cys-73 and His-159 were located at flexible active loops similar to other Sco proteins across biological taxa. This highlights structural conservation of Sco despite their various functions in prokaryotes and eukaryotes. Conclusions We propose that HP Bleg1_2507 is a Sco protein which is able to interact with COXII, its redox partner and therefore, may possess

  16. Influence of fuel sulfur on the composition of aircraft exhaust plumes: The experiments SULFUR 1-7

    NASA Astrophysics Data System (ADS)

    Schumann, U.; Arnold, F.; Busen, R.; Curtius, J.; Kärcher, B.; Kiendler, A.; Petzold, A.; Schlager, H.; Schröder, F.; Wohlfrom, K.-H.

    2002-08-01

    The series of SULFUR experiments was performed to determine the aerosol particle and contrail formation properties of aircraft exhaust plumes for different fuel sulfur contents (FSC, from 2 to 5500 μg/g), flight conditions, and aircraft (ATTAS, A310, A340, B707, B747, B737, DC8, DC10). This paper describes the experiments and summarizes the results obtained, including new results from SULFUR 7. The conversion fraction ɛ of fuel sulfur to sulfuric acid is measured in the range 0.34 to 4.5% for an older (Mk501) and 3.3 +/- 1.8% for a modern engine (CFM56-3B1). For low FSC, ɛ is considerably smaller than what is implied by the volume of volatile particles in the exhaust. For FSC >= 100 μg/g and ɛ as measured, sulfuric acid is the most important precursor of volatile aerosols formed in aircraft exhaust plumes of modern engines. The aerosol measured in the plumes of various aircraft and models suggests ɛ to vary between 0.5 and 10% depending on the engine and its state of operation. The number of particles emitted from various subsonic aircraft engines or formed in the exhaust plume per unit mass of burned fuel varies from 2 × 1014 to 3 × 1015 kg-1 for nonvolatile particles (mainly black carbon or soot) and is of order 2 × 1017 kg-1 for volatile particles >1.5 nm at plume ages of a few seconds. Chemiions (CIs) formed in kerosene combustion are found to be quite abundant and massive. CIs contain sulfur-bearing molecules and organic matter. The concentration of CIs at engine exit is nearly 109 cm-3. Positive and negative CIs are found with masses partially exceeding 8500 atomic mass units. The measured number of volatile particles cannot be explained with binary homogeneous nucleation theory but is strongly related to the number of CIs. The number of ice particles in young contrails is close to the number of soot particles at low FSC and increases with increasing FSC. Changes in soot particles and FSC have little impact on the threshold temperature for contrail

  17. In vitro selection and characterization of influenza A (A/N9) virus variants resistant to a novel neuraminidase inhibitor, A-315675.

    PubMed

    Molla, Akhteruzzaman; Kati, Warren; Carrick, Robert; Steffy, Kevin; Shi, Yan; Montgomery, Debra; Gusick, Nanette; Stoll, Vincent S; Stewart, Kent D; Ng, Teresa I; Maring, Clarence; Kempf, Dale J; Kohlbrenner, William

    2002-06-01

    With the recent introduction of neuraminidase (NA) inhibitors into clinical practice for the treatment of influenza virus infections, considerable attention has been focused on the potential for resistance development and cross-resistance between different agents from this class. A-315675 is a novel influenza virus NA inhibitor that has potent enzyme activity and is highly active in cell culture against a variety of strains of influenza A and B viruses. To further assess the therapeutic potential of this compound, in vitro resistance studies have been conducted and a comparative assessment has been made relative to oseltamivir carboxylate. The development of viral resistance to A-315675 was studied by in vitro serial passage of influenza A/N9 virus strains grown in MDCK cells in the presence of increasing concentrations of A-315675. Parallel passaging experiments were conducted with oseltamivir carboxylate, the active form of a currently marketed oral agent for the treatment of influenza virus infections. Passage experiments with A-315675 identified a variant at passage 8 that was 60-fold less susceptible to the compound. Sequencing of the viral population identified an E119D mutation in the NA gene, but no mutations were observed in the hemagglutinin (HA) gene. However, by passage 10 (2.56 microM A-315675), two mutations (R233K, S339P) in the HA gene appeared in addition to the E119D mutation in the NA gene, resulting in a 310-fold-lower susceptibility to A-315675. Further passaging at higher drug concentrations had no effect on the generation of further NA or HA mutations (20.5 microM A-315675). This P15 virus displayed 355-fold-lower susceptibility to A-315675 and >175-fold-lower susceptibility to zanamivir than did wild-type virus, but it retained a high degree of susceptibility to oseltamivir carboxylate. By comparison, virus variants recovered from passaging against oseltamivir carboxylate (passage 14) harbored an E119V mutation and displayed a 6,000-fold

  18. Análise sobre o Conhecimento de um Grupo de Alunos do Ensino Médio da Rede Estadual de São Paulo sobre Termos e Fenômenos Astronômicos do Cotidiano

    NASA Astrophysics Data System (ADS)

    de Oliveira, E. F.; Voelzke, M. R.; Amaral, L. H.

    2007-08-01

    Embora os Parâmetros Curriculares Nacionais do Ensino Médio (PCN-EM) e as orientações complementares a esses Parâmetros (PCN+) apontem a importância de uma abordagem significativa de conceitos relacionados à astronomia nas aulas de Física, muitos estudantes terminam o Ensino Médio (EM) sem compreender a razão de certos acontecimentos de origem celeste, ainda que estes façam parte de seu cotidiano. Este trabalho tem por objetivo analisar os conhecimentos básicos em astronomia dos alunos de EM da escola estadual Batista Renzi, bem como investigar os meios através dos quais estes conhecimentos foram adquiridos. Para tanto foi elaborado um questionário de múltipla escolha aplicado a 310 alunos distribuídos entre as três séries do EM dos períodos matutino e noturno. Dessa forma, observou-se que apenas 34,5% relacionaram as estações do ano à inclinação do eixo de rotação da Terra, 21,3% indicaram a influência gravitacional da Lua e do Sol como responsáveis pelo fenômeno das marés, 24,5% indicaram corretamente quais são os objetos celestes mais próximos da Terra, 36,1% identificaram ano-luz como uma medida de distância e 34,2% reconheceram uma estrela cadente como meteoro. Em contrapartida, 67,1% compreendiam a sucessão entre dia e noite, 73,9% identificaram o Sol como estrela e 52,3% relacionaram o Big Bang à origem do Universo. Além disso, foram comparadas as respostas de alunos de diferentes séries e períodos, observando-se, dentre outras coisas, que os estudantes do terceiro ano apresentam um percentual de acertos semelhante ao dos alunos do primeiro, caracterizando que a abordagem de tópicos relacionados à astronomia no EM não tem contribuído para uma maior compreensão dos fenômenos e conceitos.

  19. UTILIZING INNOVATIVE TECHNOLOGIES FOR ENVIRONMENTAL CLEAN-UP, SAVAHHAH RIVER SITE

    SciTech Connect

    Bergren, C

    2009-01-07

    The Savannah River Site (SRS) is a 310-square-mile United States Department of Energy nuclear facility located along the Savannah River near Aiken, South Carolina. During operations, which started in 1951, hazardous substances (chemicals and radionuclides) were released to the environment. The releases occurred as a result of inadvertent spills and waste disposal in unlined pits and basins which was common practice before environmental regulations existed. The hazardous substances have migrated to the vadose zone and groundwater in many areas of the SRS, resulting in 515 waste units and facilities that are required by environmental regulations, to undergo characterization and, if needed, remediation. In the initial years of the SRS environmental cleanup program (early 1990s), the focus was to use common technologies (such as pump and treat, air stripping, excavation and removal) that actively and tangibly removed contamination. Exclusive use of these technologies required continued and significant funding while often failing to meet acceptable clean-up goals and objectives. Recognizing that a more cost-effective approach was needed, SRS implemented new and complementary remediation methods focused on active and passive technologies targeted to solve specific remediation problems. Today, SRS uses technologies such as chemical/pH-adjusting injection, phytoremediation, underground cutoff walls, dynamic underground stripping, soil fracturing, microbial degradation, baroballs, electrical resistance heating, soil vapor extraction, and microblowers to more effectively treat contamination at lower costs. Additionally, SRS's remediation approach cost effectively maximizes cleanup as SRS works proactively with multiple regulatory agencies. Using GIS, video, animation, and graphics, SRS is able to provide an accurate depiction of the evolution of SRS groundwater and vadose zone cleanup activities to convince stakeholders and regulators of the effectiveness of various cleanup

  20. The Structure of Free L11 and Functional Dynamics of L11 in Free, L11-rRNA(58nt) Binary and L11-rRNA(58nt)-thiostrepton Ternary Complexes

    PubMed Central

    Lee, Donghan; Walsh, Joseph D.; Yu, Ping; Markus, Michelle A.; Choli-Papadopoulou, Theodora; Schwieters, Charles D.; Krueger, Susan; Draper, David E.; Wang, Yun-Xing

    2007-01-01

    Summary The L11 binding site is one of the most important functional sites in the ribosome. The N-terminal domain of L11 has been implicated as a “reversible switch” in facilitating the coordinated movements associated with EF-G–driven GTP hydrolysis. The “reversible switch” mechanism has been hypothesized to require conformational flexibility involving re-orientation and re-positioning of the two L11 domains, and warrants a close examination of the structure and dynamics of L11. Here we report the solution structure of free L11, and relaxation studies of free L11, L11complexed to its 58 nt RNA recognition site, and L11 in a ternary complex with the RNA and thiostrepton antibiotic. The binding site of thiostrepton on L11 was also defined by analysis of structural and dynamics data and chemical shift mapping. The conclusions of this work are as follows: First, the binding of L11 to RNA leads to sizable conformation changes in the regions flanking the linker and in the hinge area that links a β-sheets and a 310-helix-turn-helix element in the N-terminus. Concurrently, the change in the relative orientation may lead to re-positioning of the N-terminus, as implied by a decrease of radius of gyration from 18.5 Å to 16.2 Å. Second, the regions, which undergo large conformation changes, exhibit motions on ms-μs or ns-ps time scales. Third, binding of thiostrepton results in more rigid conformations near the linker (Thr71) and near its putative binding site (Leu12). Lastly, conformational changes in the putative thiostrepton binding site are implicated by the re-emergence of cross-correlation peaks in the spectrum of the ternary complex, which were missing in that of the binary complex. Our combined analysis of both the chemical shift perturbation and dynamics data clearly indicates that thiostrepton binds to a pocket involving residues in the 310-helix in L11. PMID:17292917

  1. The 300 mA SRF ERL

    SciTech Connect

    Ben-Zvi, Ilan

    2013-11-07

    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.

  2. First light for the sodium laser guide star adaptive optics system on the Lijiang 1.8m telescope

    NASA Astrophysics Data System (ADS)

    Wei, Kai; Li, Min; Chen, Shan-Qiu; Bo, Yong; Chen, Feng; Zuo, Jun-Wei; Bian, Qi; Yao, Ji; Zhou, Lu-Chun; Wei, Lin; Chen, Dong-Hong; Gao, Yang; Jin, Kai; Dai, Xiao-Lin; Fu, Han-Chu; Xu, Chang; Wang, Zhi-Chao; Xue, Xiang-Hui; Chen, Xue-Wu; Qian, Xian-Mei; Zhou, Yu; Xian, Hao; Peng, Qin-Jun; Rao, Chang-Hui; Xu, Zu-Yan; Zhang, Yu-Dong

    2016-12-01

    A first generation sodium Laser Guide Star Adaptive Optics System (LGS-AOS) was developed and integrated into the Lijiang 1.8m telescope in 2013. The LGS-AOS has three sub-systems: (1) a 20 W long pulsed sodium laser, (2) a 300-millimeter-diameter laser launch telescope, and (3) a 37-element compact adaptive optics system. On 2014 January 25, we obtained high resolution images of an mV 8.18 star, HIP 43963, during the first light of the LGS-AOS. In this paper, the sodium laser, the laser launch telescope, the compact adaptive optics system and the first light results will be presented.

  3. 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.

  4. 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 described 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.

  5. Systems Analysis for a Venus Aerocapture Mission

    NASA Technical Reports Server (NTRS)

    Lockwood, Mary Kae; Starr, Brett R.; Paulson, John W., Jr.; Kontinos, Dean A.; Chen, Y. K.; Laub, Bernard; Olejniczak, Joseph; Wright, Michael J.; Takashima, Naruhisa; Justus, Carl G.

    2006-01-01

    Previous high level analysis has indicated that significant mass savings may be possible for planetary science missions if aerocapture is employed to place a spacecraft in orbit. In 2001 the In-Space Propulsion program identified aerocapture as one of the top three propulsion technologies for planetary exploration but that higher fidelity analysis was required to verify the favorable results and to determine if any supporting technology gaps exist that would enable or enhance aerocapture missions. A series of three studies has been conducted to assess, from an overall system point of view, the merit of using aerocapture at Titan, Neptune and Venus. These were chosen as representative of a moon with an atmosphere, an outer giant gas planet and an inner planet. The Venus mission, based on desirable science from plans for Solar System Exploration and Principal Investigator proposals, to place a spacecraft in a 300km polar orbit was examined and the details of the study are presented in this paper.

  6. 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.

  7. The 16 May 1909 northern Great Plains earthquake

    USGS Publications Warehouse

    Bakun, W.H.; Stickney, M.C.; Rogers, Gary C.

    2011-01-01

    The largest historical earthquake in the northern Great Plains occurred on 16 May 1909. Our analysis of intensity assignments places the earthquake location (48.81° N, 105.38° W) close to the Montana–Saskatchewan border with an intensity magnitude MI of 5.3–5.4. Observations from two seismic observatories in Europe give an average Ms value of 5.3. The 1909 earthquake is near an alignment of epicenters of small earthquakes in Montana and Saskatchewan and on strike with the mapped Hinsdale fault in Montana. Thus, the 1909 earthquake may have occurred on a 300-km-long seismically active fault, which could have seismic-hazard implications for the region, particularly for the hydraulically emplaced earth-filled Fort Peck Dam, constructed in the 1930s on the Missouri River in northeast Montana.

  8. A Kirkpatrick-Baez microscope for the National Ignition Facility

    SciTech Connect

    Pickworth, L. A. McCarville, T.; Decker, T.; Pardini, T.; Ayers, J.; Bell, P.; Bradley, D.; Brejnholt, N. F.; Izumi, N.; Mirkarimi, P.; Pivovaroff, M.; Smalyuk, V.; Vogel, J.; Walton, C.; Kilkenny, J.

    2014-11-15

    Current pinhole x ray imaging at the National Ignition Facility (NIF) is limited in resolution and signal throughput to the detector for Inertial Confinement Fusion applications, due to the viable range of pinhole sizes (10–25 μm) that can be deployed. A higher resolution and throughput diagnostic is in development using a Kirkpatrick-Baez microscope system (KBM). The system will achieve <9 μm resolution over a 300 μm field of view with a multilayer coating operating at 10.2 keV. Presented here are the first images from the uncoated NIF KBM configuration demonstrating high resolution has been achieved across the full 300 μm field of view.

  9. Delay locked loop integrated circuit.

    SciTech Connect

    Brocato, Robert Wesley

    2007-10-01

    This report gives a description of the development of a Delay Locked Loop (DLL) integrated circuit (IC). The DLL was developed and tested as a stand-alone IC test chip to be integrated into a larger application specific integrated circuit (ASIC), the Quadrature Digital Waveform Synthesizer (QDWS). The purpose of the DLL is to provide a digitally programmable delay to enable synchronization between an internal system clock and external peripherals with unknown clock skew. The DLL was designed and fabricated in the IBM 8RF process, a 0.13 {micro}m CMOS process. It was designed to operate with a 300MHz clock and has been tested up to 500MHz.

  10. Observations of Field-Aligned Current Spatial and Temporal Variations by Space Technology 5

    NASA Astrophysics Data System (ADS)

    Le, G.; Slavin, J. A.; Strangeway, R. J.; Wang, Y.

    2013-12-01

    In this paper, we report the results of magnetic field measurements of field-aligned currents (FACs) using multi-point magnetic field data from Space Technology 5 (ST-5) mission. ST-5 is a three micro-satellite constellation deployed into a 300 x 4500 km, dawn-dusk, sun synchronous polar orbit. The spacecraft were maintained in a 'pearls on a sting' constellation with controlled spacings ranging from just over 5000 km down to under 50 km. During the three-month mission duration, the constellation mission returned high quality multi-point measurements of the magnetic field through Earth's dynamic ionospheric current systems over a range of inter-satellite spacing. In this study, we use the ST-5 magnetic field measurements to separate spatial and temporal variations of FACs and to quantify the imbalance between the region 1 (R1) and the region 2 (R2) currents.

  11. Multi-level multi-thermal-electron FDTD simulation of plasmonic interaction with semiconducting gain media: applications to plasmonic amplifiers and nano-lasers.

    PubMed

    Chen, X; Bhola, B; Huang, Y; Ho, S T

    2010-08-02

    Interactions between a semiconducting gain medium and confined plasmon-polaritons are studied using a multilevel multi-thermal-electron finite-difference time-domain (MLMTE-FDTD) simulator. We investigated the amplification of wave propagating in a plasmonic metal-semiconductor-metal (MSM) waveguide filled with semiconductor gain medium and obtained the conditions required to achieve net optical gain. The MSM gain waveguide is used to form a plasmonic semiconductor nano-ring laser(PSNRL) with an effective mode volume of 0.0071 microm3, which is about an order of magnitude smaller than the smallest demonstrated integrated photonic crystal based laser cavities. The simulation shows a lasing threshold current density of 1kA/cm2 for a 300 nm outer diameter ring cavity with 80 nm-wide ring. This current density can be realistically achieved in typical III-V semiconductor, which shows the experimental feasibility of the proposed PSNRL structure.

  12. A tale of two fractals: The Hofstadter butterfly and the integral Apollonian gaskets

    NASA Astrophysics Data System (ADS)

    Satija, Indubala I.

    2016-11-01

    This paper unveils a mapping between a quantum fractal that describes a physical phenomena, and an abstract geometrical fractal. The quantum fractal is the Hofstadter butterfly discovered in 1976 in an iconic condensed matter problem of electrons moving in a two-dimensional lattice in a transverse magnetic field. The geometric fractal is the integer Apollonian gasket characterized in terms of a 300 BC problem of mutually tangent circles. Both of these fractals are made up of integers. In the Hofstadter butterfly, these integers encode the topological quantum numbers of quantum Hall conductivity. In the Apollonian gaskets an infinite number of mutually tangent circles are nested inside each other, where each circle has integer curvature. The mapping between these two fractals reveals a hidden D3 symmetry embedded in the kaleidoscopic images that describe the asymptotic scaling properties of the butterfly. This paper also serves as a mini review of these fractals, emphasizing their hierarchical aspects in terms of Farey fractions.

  13. Earth-based photography of Comet Kohoutek in sky on December 6, 1973

    NASA Technical Reports Server (NTRS)

    1973-01-01

    An earth-based photograph of the Comet Kohoutek in the sky on December 6, 1973, when the celestial phenomenon was more than 70 million miles from the Sun and some 119 million miles from Earth. This picture was taken from a dark mountain top area of Haleakala (Island of Maui) Hawaii, using a 35mm Nikon camera with a 55mm lens, a 300-second exposure at f/1.2 and with Tri-X film. The photographer was Frank Giovane. The indicated visible tail of the comet appears to be about 10 million miles long. Other reports have inferred that the length of the tail is up to 13 million miles. The Skylab 4 crewmen have reported that Kohoutek's tail-length was from 2 to 3 degrees or from 4 to 6 million miles as viewed with the naked eye from the Skylab space station in earth orbit.

  14. Backward Secondary-Wave Coherence Errors in Photonic Bandgap Fiber Optic Gyroscopes

    PubMed Central

    Xu, Xiaobin; Song, Ningfang; Zhang, Zuchen; Jin, Jing

    2016-01-01

    Photonic bandgap fiber optic gyroscope (PBFOG) is a novel fiber optic gyroscope (FOG) with excellent environment adaptability performance compared to a conventional FOG. In this work we find and investigate the backward secondary-wave coherence (BSC) error, which is a bias error unique to the PBFOG and caused by the interference between back-reflection-induced and backscatter-induced secondary waves. Our theoretical and experimental results show a maximum BSC error of ~4.7°/h for a 300-m PBF coil with a diameter of 10 cm. The BSC error is an important error source contributing to bias instability in the PBFOG and has to be addressed before practical applications of the PBFOG can be implemented. PMID:27338388

  15. Infrared bolometers with silicon nitride micromesh absorbers

    NASA Technical Reports Server (NTRS)

    Bock, J. J.; Turner, A. D.; DelCastillo, H. M.; Beeman, J. W.; Lange, A. E.; Mauskopf, P. D.

    1996-01-01

    Sensitive far infrared and millimeter wave bolometers fabricated from a freestanding membrane of low stress silicon nitride are reported. The absorber, consisting of a metallized silicon nitride micromesh thermally isolated by radial legs of silicon nitride, is placed in an integrating cavity to efficiently couple to single mode or multiple mode infrared radiation. This structure provides low heat capacity, low thermal conduction and minimal cross section to energetic particles. A neutron transmutation doped Ge thermister is bump bonded to the center of the device and read out with evaporated Cr-Au leads. The limiting performance of the micromesh absorber is discussed and the recent results obtained from a 300 mK cold stage are summarized.

  16. Use of a YAP:Ce matrix coupled to a position-sensitive photomultiplier for high resolution positron emission tomography

    SciTech Connect

    Del Guerra, A.; Zavattini, G. |; Notaristefani, F. de |; Di Domenico, G. |; Giganti, M.; Piffanelli, A.; Pani, R.; Turra, A.

    1996-06-01

    A new scintillation detector system has been designed for application in high resolution Positron Emission Tomography (PET). The detector is a bundle of small YAlO{sub 3}:Ce (YAP) crystals closely packed (0.2 x 0.2 x 3.0 cm{sup 3}), coupled to a position sensitive photomultiplier tube (PSPMT). The preliminary results obtained for spatial resolution, time resolution, energy resolution and efficiency of two such detectors working in coincidence are presented. These are 1.2 mm for the FWHM spatial resolution, 2.0 ns for the FWHM time resolution and 20% for the FWHM energy resolution at 511 keV. The measured efficiency is (44 {+-} 3)% with a 150 keV threshold and (20 {+-} 2)% with a 300 keV threshold.

  17. Entrapment of a micro-guidewire during stenting of basilar stenosis.

    PubMed

    Ma, Ning; Liu, Lian; Wang, Tie-Jun; Xu, Xiao-Tong; Miao, Zhong-Rong

    2014-06-01

    Entrapment of a microwire related to intracranial endovascular therapy is an uncommon complication. A 64-year-old man with symptomatic basilar artery stenosis was treated with stenting. A 300 cm Synchro microwire became trapped in the P1 segment of the left posterior cerebral artery during the procedure. The decision was made to leave the microwire in place, considering that aggressive retrieval procedures could cause injury to the cerebral vasculature. The entrapped microwire was later inadvertently dislocated and removed while pulling the microwire back into the femoral artery with a looped catheter from the left femoral access. This demonstrates that, although entrapment of a microwire during endovascular therapy is a rare event, an optimal salvage technique needs to be explored further.

  18. Entrapment of a micro-guidewire during stenting of basilar stenosis.

    PubMed

    Ma, Ning; Liu, Lian; Wang, Tie-Jun; Xu, Xiao-Tong; Miao, Zhong-Rong

    2013-08-01

    Entrapment of a microwire related to intracranial endovascular therapy is an uncommon complication. A 64-year-old man with symptomatic basilar artery stenosis was treated with stenting. A 300 cm Synchro microwire became trapped in the P1 segment of the left posterior cerebral artery during the procedure. The decision was made to leave the microwire in place, considering that aggressive retrieval procedures could cause injury to the cerebral vasculature. The entrapped microwire was later inadvertently dislocated and removed while pulling the microwire back into the femoral artery with a looped catheter from the left femoral access. This demonstrates that, although entrapment of a microwire during endovascular therapy is a rare event, an optimal salvage technique needs to be explored further.

  19. Setting radon-specific release criteria and demonstrating compliance for land affected by NORM.

    PubMed

    García-Talavera, M; Martínez, M; Matarranz, J L M; Ramos, L

    2008-11-01

    Residues from industrial activities involving naturally occurring radioactive materials (NORMs) may cause radiation exposures to members of the public, particularly when NORM-affected land is brought into residential use. To provide an adequate protection against radiation in such situations, the following limiting criteria are currently required in Spain for releasing NORM-affected land: (i) no more than a 300 microSv yr(-1) increase (excluding radon doses) over the natural background; (ii) (222)Rn concentrations in hypothetical future dwellings lower than 200 Bq m(-3); and (iii) reduction of all radiation exposures to as low as reasonable achievable. This paper addresses some of the problems encountered in translating the (222)Rn criterion into site-specific release limits and in demonstrating compliance with them.

  20. Ada (trademark) Compiler Validation Summary Report. Verdix Ada Compiler, VADS, Version V03.06 for VAX-11/785, Using ULTRIX 1.0.

    DTIC Science & Technology

    1985-06-14

    CCA207AOM C L3 04- ABADA /A A300B1 CA2007AOM C LA3004A-ABD N/A LA3007B2 C CA2007A1 C LA3004AO-AB N/A LA3007B2 C CA2007A2 C LA3004A2-AB N/A LA3007B4 C...B.ADA P CC3120B-B.ADA P CC3504A-B.ADA PI.BC3503B-B.ADA P CC32A-B.ADA P CC3504B-B.ADA P BC3503D-B.ADA P CC3203A- ABADA P CC3504C-B.ADA P BC3503D-B.ADA P

  1. Tryptophan as key biomarker to detect gastrointestinal tract cancer using non-negative biochemical analysis of native fluorescence and Stokes Shift spectroscopy

    NASA Astrophysics Data System (ADS)

    Wang, Leana; Zhou, Yan; Liu, Cheng-hui; Zhou, Lixin; He, Yong; Pu, Yang; Nguyen, Thien An; Alfano, Robert R.

    2015-03-01

    The objective of this study was to find out the emission spectral fingerprints for discrimination of human colorectal and gastric cancer from normal tissue in vitro by applying native fluorescence. The native fluorescence (NFL) and Stokes shift spectra of seventy-two human cancerous and normal colorectal (colon, rectum) and gastric tissues were analyzed using three selected excitation wavelengths (e.g. 300 nm, 320 nm and 340 nm). Three distinct biomarkers, tryptophan, collagen and reduced nicotinamide adenine dinucleotide hydrate (NADH), were found in the samples of cancerous and normal tissues from eighteen subjects. The spectral profiles of tryptophan exhibited a sharp peak in cancerous colon tissues under a 300 nm excitation when compared with normal tissues. The changes in compositions of tryptophan, collagen, and NADH were found between colon cancer and normal tissues under an excitation of 300 nm by the non-negative basic biochemical component analysis (BBCA) model.

  2. Towards a multi-channel TOF-PET system with SiPM readout

    NASA Astrophysics Data System (ADS)

    Garutti, Erika; Göttlich, Martin; Harion, Tobias; Hegemann, Niklas; Schmidt, Maximilian; Schultz-Coulon, Hans-Christian; Shen, Wei; Silenzi, Alessandro; Stamen, Rainer; Tadday, Alexander; Xu, Chen

    2012-12-01

    The goal of this project is to develop a multi-channel TOF-PET system with a 300 ps FWHM time resolution, a factor two improvement with respect to commercially available systems (Surti et al., 2007 [1]). In a TOF-PET system, the time-of-flight information can be used to improve significantly the sensitivity of the detector as shown in Karp et al. (2008) [2]. The target time resolution has been achieved in two channel systems with LYSO (Kim and Wang, 2008 [3]), the aim is to port this results into a multi-channel system. This work extends the results shown in Göttlich et al. (2010) [4], studying the stability of the detector performance in different geometries and configurations.

  3. 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.

  4. 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.

  5. CO2 laser-fabricated cladding light strippers for high-power fiber lasers and amplifiers.

    PubMed

    Boyd, Keiron; Simakov, Nikita; Hemming, Alexander; Daniel, Jae; Swain, Robert; Mies, Eric; Rees, Simon; Andrew Clarkson, W; Haub, John

    2016-04-10

    We present and characterize a simple CO2 laser processing technique for the fabrication of compact all-glass optical fiber cladding light strippers. We investigate the cladding light loss as a function of radiation angle of incidence and demonstrate devices in a 400 μm diameter fiber with cladding losses of greater than 20 dB for a 7 cm device length. The core losses are also measured giving a loss of <0.008±0.006  dB/cm. Finally we demonstrate the successful cladding light stripping of a 300 W laser diode with minimal heating of the fiber coating and packaging adhesives.

  6. Construction and measurements of an improved vacuum-swing-adsorption radon-mitigation system

    SciTech Connect

    Street, J. Bunker, R.; Dunagan, C.; Loose, X.; Schnee, R. W.; Stark, M.; Sundarnath, K.; Tronstad, D.

    2015-08-17

    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 activity of 58.6 ± 0.7 Bq m{sup −3} to a cleanroom activity of 0.13 ± 0.06 Bq m{sup −3}.

  7. Ferry to the moon

    SciTech Connect

    Aston, G.

    1987-06-01

    Solar-electric propulsion for a fleet of lunar ferry vehicles may allow the creation of a permanent lunar base not long after the turn of the century with greater cost effectiveness than a fleet of chemically powered spacecraft. After delivery by the Space Shuttle to a 300-km earth orbit, the lunar ferry envisioned would travel in spiral trajectory to the moon under the power of 300-kW solar arrays and ten 30-kW Xe-ion engines; each of the solar arrays would be 12 x 61 m long. Each trip between the earth parking orbit and the moon would take about 1 year, so that a fleet of four ferries operating simultaneously could deliver 20 metric tons to a lunar base every 100 days.

  8. Ferry to the moon

    NASA Technical Reports Server (NTRS)

    Aston, Graeme

    1987-01-01

    Solar-electric propulsion for a fleet of lunar ferry vehicles may allow the creation of a permanent lunar base not long after the turn of the century with greater cost effectiveness than a fleet of chemically powered spacecraft. After delivery by the Space Shuttle to a 300-km earth orbit, the lunar ferry envisioned would travel in spiral trajectory to the moon under the power of 300-kW solar arrays and ten 30-kW Xe-ion engines; each of the solar arrays would be 12 x 61 m long. Each trip between the earth parking orbit and the moon would take about 1 year, so that a fleet of four ferries operating simultaneously could deliver 20 metric tons to a lunar base every 100 days.

  9. Real-time capable first principle based modelling of tokamak turbulent transport

    NASA Astrophysics Data System (ADS)

    Citrin, J.; Breton, S.; Felici, F.; Imbeaux, F.; Aniel, T.; Artaud, J. F.; Baiocchi, B.; Bourdelle, C.; Camenen, Y.; Garcia, J.

    2015-09-01

    A real-time capable core turbulence tokamak transport model is developed. This model is constructed from the regularized nonlinear regression of quasilinear gyrokinetic transport code output. The regression is performed with a multilayer perceptron neural network. The transport code input for the neural network training set consists of five dimensions, and is limited to adiabatic electrons. The neural network model successfully reproduces transport fluxes predicted by the original quasilinear model, while gaining five orders of magnitude in computation time. The model is implemented in a real-time capable tokamak simulator, and simulates a 300 s ITER discharge in 10 s. This proof-of-principle for regression based transport models anticipates a significant widening of input space dimensionality and physics realism for future training sets. This aims to provide unprecedented computational speed coupled with first-principle based physics for real-time control and integrated modelling applications.

  10. Transient Effects And Pump Depletion In Stimulated Raman Scattering

    NASA Astrophysics Data System (ADS)

    Carlsten, J. L.; Wenzel, R. G...; Druhl, K.

    1983-11-01

    Stimulated rotational Raman scattering in a 300-K multipass cell filled with para-H2 with a single-mode CO2-pumped laser is studied using a frequency-narrowed optical parametric oscillator (OPO) as a probe laser at the Stokes frequency for the So(0) transition. Amplification and pump depletion are examined as a function of incident pump energy. The pump depletion shows clear evidence of transient behavior. A theoretical treatment of transient stimulated Raman scattering, including effects of both pump depletion and medium saturation is presented. In a first approximation, diffraction effects are neglected, and only plane-wave interactions are considered. The theoretical results are compared to the experimental pulse shapes.

  11. Neutron diffraction investigation of residual stresses in transverse/oblique rail slices subjected to different grinding strategies

    SciTech Connect

    Gnaeupel-Herold, T.; Brand, P.C.; Prask, H.J.

    1999-05-01

    Using the Double Axis system for Residual stress, Texture, and Single crystal analysis (DARTS) at NIST, neutron diffraction residual stress measurements were carried out in the head region of five pairs of transverse and oblique cut slices of railroad track, each having a thickness of 6.35 mm. The slices were taken from a 300 HB rail of CFI 136 RE size. All slices except one unworn reference piece had the same accumulated tonnage but were ground in different intervals. The measurements confirm the results previously found which indicated the existence of high sub-surface residual tensile stresses, while the regional close to the wheel-rail contact line shows high residual compressive stresses.

  12. Imaging With Nature: Compressive Imaging Using a Multiply Scattering Medium

    PubMed Central

    Liutkus, Antoine; Martina, David; Popoff, Sébastien; Chardon, Gilles; Katz, Ori; Lerosey, Geoffroy; Gigan, Sylvain; Daudet, Laurent; Carron, Igor

    2014-01-01

    The recent theory of compressive sensing leverages upon the structure of signals to acquire them with much fewer measurements than was previously thought necessary, and certainly well below the traditional Nyquist-Shannon sampling rate. However, most implementations developed to take advantage of this framework revolve around controlling the measurements with carefully engineered material or acquisition sequences. Instead, we use the natural randomness of wave propagation through multiply scattering media as an optimal and instantaneous compressive imaging mechanism. Waves reflected from an object are detected after propagation through a well-characterized complex medium. Each local measurement thus contains global information about the object, yielding a purely analog compressive sensing method. We experimentally demonstrate the effectiveness of the proposed approach for optical imaging by using a 300-micrometer thick layer of white paint as the compressive imaging device. Scattering media are thus promising candidates for designing efficient and compact compressive imagers. PMID:25005695

  13. 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.

  14. 1073 nm continuous-wave Nd:YVO₄ laser with Type I phase-matching LiB₃O₅.

    PubMed

    Pang, Q S; Fu, J; Chang, L; Chen, M; Liu, Y; Xu, L Z; Bai, Z A; Guo, W R; Li, G

    2011-04-01

    Continuous output from a Nd:YVO₄ crystal around 1073 nm was studied. The output of 1064 nm was suppressed with a Type I phase-matching LiB₃O₅ (LBO) crystal rotated by 45°. With a pump power of 4.5 W, a 300 mW continuous output at 1073 nm was achieved for what we believe is the first time, and the optical-to-optical efficiency was 7%. With an adjustable LBO crystal, the wavelength is tunable from 1073.2 to 1073.5 nm. Even simultaneous output of 1066 and 1073 nm was realized by adjusting the LBO crystal. The experiments proved related theoretical analysis.

  15. Dynamic characteristics of two 300 kW class dual keel space station concepts

    NASA Technical Reports Server (NTRS)

    Dorsey, J. T.; Sutter, T. R.; Lake, M. S.; Cooper, P. A.

    1986-01-01

    Results from an investigation of the dynamic behavior of a 300 kW class solar dynamic powered, dual kell space station are presented. The purpose of the investigation was to determine and assess the influence of space station truss bay size on station controllability during rigid body attitude adjustment and orbit reboost maneuvers. The dual keel space station concept is defined and two finite element models (one which has a truss bay size of 5m and another with a truss bay size of 9 feet) are described. Rigid and flexible body characteristics of the two space station models are also presented. Finally, results from a transient response analysis, where the stations are subjected to an orbit reboost maneuver, are summarized.

  16. Graphene as a transparent electrode for amorphous silicon-based solar cells

    SciTech Connect

    Vaianella, F. Rosolen, G.; Maes, B.

    2015-06-28

    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. 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. Problems with the N/sub 2//sup +/+0. -->. NO/sup +/+N reaction in aurora

    SciTech Connect

    Swider, W.; Narcisi, R.S.

    1981-12-01

    An effective rate coefficient for N/sub 2//sup +/+0..-->..NO/sup +/+N which increases with altitude is deduced from an analysis of the auroral ion composition measured between 120 and 200 km over Poker Flat, Alaska on March 6, 1981. This result may be interpreted in terms of a rate coefficient with a positive temperature dependence, roughly k/sub 3/approx. =1.5 x 10/sup -10/ (T/sub i//3000)/sup 0.6/ cm/sup 3/ s/sup -1/ over a 300-1600 /sup 0/K temperature range. Other interpretations are discussed, including the possibility that the N/sub 2//sup +/ ions are vibrationally excited.

  19. Final Technical Report: Low-Cost Solar Variability Sensors for Ubiquitous Deployment.

    SciTech Connect

    Lave, Matthew Samuel

    2016-01-01

    In this project, an integrated solution to measuring and collecting solar variability data called the solar variability datalogger (SVD) was developed, tested, and the value of its data to distribution grid integration studies was demonstrated. This work addressed the problem that high-frequency solar variability is rarely measured – due to the high cost and complex installation of existing solar irradiance measuring pyranometers – but is critical to the accurate determination of the impact of photovoltaics to electric grid operation. For example, up to a 300% difference in distribution grid voltage regulator tap change operations (a measure of the impact of PV) [1] has been observed due solely to different solar variability profiles.

  20. A cosmic gamma ray burst measured by Apollo 16. [and correlated to Vela 6A data

    NASA Technical Reports Server (NTRS)

    Matteson, J. L.; Arnold, J. R.; Metzger, A. E.; Parker, R. H.; Gilman, D. A.; Trombka, J. I.; Peterson, L. E.

    1974-01-01

    A cosmic gamma ray burst at about 1058:21 UT on April 27, 1972, was detected with an omnidirectional scintillation counter on Apollo 16. The event whose energy was approximately 0.0002 erg/sq cm, was pulse height analyzed in 512 channels over the 0.067 less than or equal to E less than or equal to 5 MeV range, and shows a complex, multipeak structure on a 300 msec time scale. The burst was also measured by a collimated X-ray detector on Apollo 16, giving spectral data in the 2 to 8 keV range which, together with a simultaneous observation by Vela 6A, allows a directional determination.