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Sample records for operations limited model

  1. 76 FR 53348 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model BAe 146 Airplanes and Model Avro...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-26

    ... life limits on shock absorber assemblies, but not the individual shock absorber components, and amend... BAE Systems (Operations) Limited has amended the AMM to remove the life limits on shock absorber assemblies, but not the individual shock absorber components, and amend the life limits on the...

  2. Does model structure limit the use of satellite data as hydrologic forcing for distributed operational models?

    NASA Astrophysics Data System (ADS)

    Bowman, A. L.; Franz, K.; Hogue, T. S.

    2015-12-01

    We are investigating the implications for use of satellite data in operational streamflow prediction. Specifically, the consequence of potential hydrologic model structure deficiencies on the ability to achieve improved forecast accuracy through the use of satellite data. We want to understand why advanced data do not lead to improved streamflow simulations by exploring how various fluxes and states differ among models of increasing complexity. In a series of prior studies, we investigated the use of a daily satellite-derived potential evapotranspiration (PET) estimate as input to the National Weather Service (NWS) streamflow forecast models for watersheds in the Upper Mississippi and Red river basins. Although the spatial PET product appears to represent the day-to-day variability in PET more realistically than current climatological methods used by the NWS, the impact of the satellite data on streamflow simulations results in slightly poorer model efficiency overall. Analysis of the model states indicates the model progresses differently between simulations with baseline PET and the satellite-derived PET input, though variation in streamflow simulations overall is negligible. For instance, the upper zone states, responsible for the high flows of a hydrograph, show a profound difference, while simulation of the peak flows tend to show little variation in the timing and magnitude. Using the spatial PET input, the lower zone states show improvement with simulating the recession limb and baseflow portion of the hydrograph. We anticipate that through a better understanding of the relationship between model structure, model states, and simulated streamflow we will be able to diagnose why simulations of discharge from the forecast model have failed to improve when provided seemingly more representative input data. Identifying model limitations are critical to demonstrating the full benefit of a satellite data for operational use.

  3. 75 FR 10701 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model BAe 146 Airplanes and Model Avro...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-09

    ... certain items and inspections to detect fatigue cracking in certain structures. The original NPRM proposed... inspections to detect fatigue cracking in certain structures. The original NPRM resulted from issuance of a... Control Limitations for the fuel system. We are proposing this supplemental NPRM to ensure that...

  4. 75 FR 28463 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model BAe 146 Airplanes and Model Avro...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-21

    ... Airworthiness to incorporate life limits for certain items and inspections to detect fatigue cracking in certain... certain inspections to detect fatigue cracking in certain structures. This AD also requires revising the... to ensure that fatigue cracking of certain structural elements is detected and corrected, and...

  5. 40 CFR Table 3 to Subpart Dddd of... - Model Rule-Operating Limits for Wet Scrubbers

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... (CONTINUED) AIR PROGRAMS (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Emissions Guidelines... operating limits And monitor using these minimum frequencies Data measurement Data recording Averaging time... or amperage Continuous Every 15 minutes 3-hour rolling a Scrubber liquor flow rate Minimum flow...

  6. 76 FR 31459 - Airworthiness Directives; BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 and Avro 146-RJ Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-01

    ...-208-AD; Amendment 39-16705; AD 2011-11-06] RIN 2120-AA64 Airworthiness Directives; BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 and Avro 146-RJ Airplanes AGENCY: Federal Aviation Administration (FAA..., prompted by a crack found at the top of the Nose Landing Gear (NLG) oleo, BAE Systems Operations) Ltd...

  7. 75 FR 49377 - Airworthiness Directives; BAE Systems (Operations) Limited Model Avro 146-RJ and BAe 146 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-13

    ...-012-AD; Amendment 39-16387; AD 2010-16-10] RIN 2120-AA64 Airworthiness Directives; BAE Systems (Operations) Limited Model Avro 146-RJ and BAe 146 Airplanes AGENCY: Federal Aviation Administration (FAA... has been identified regarding the interchanging of wing links on all BAe 146 & AVRO 146-RJ...

  8. 75 FR 53855 - Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-02

    ...-226-AD; Amendment 39-16423; AD 2010-18-10] RIN 2120-AA64 Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes AGENCY: Federal Aviation Administration (FAA... Applicability that have been modified to freighter configuration in accordance with BAE Systems modification...

  9. 75 FR 12158 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model Avro 146-RJ and BAe 146 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-15

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model Avro 146-RJ and BAe 146 Airplanes AGENCY: Federal Aviation Administration (FAA... fleet wide problem has been identified regarding the interchanging of wing links on all BAe 146 &...

  10. 76 FR 64788 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model 4101 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-19

    ...-176-AD; Amendment 39-16829; AD 2011-21-06] RIN 2120-AA64 Airworthiness Directives; BAE SYSTEMS... condition on an aviation product. The MCAI describes the unsafe condition as: * * * BAE Systems (Operations... operators to comply with those instructions. Since the issuance of that AD, BAE Systems (Operations) Ltd...

  11. Regional climate model simulations indicate limited climatic impacts by operational and planned European wind farms.

    PubMed

    Vautard, Robert; Thais, Françoise; Tobin, Isabelle; Bréon, François-Marie; Devezeaux de Lavergne, Jean-Guy; Colette, Augustin; Yiou, Pascal; Ruti, Paolo Michele

    2014-01-01

    The rapid development of wind energy has raised concerns about environmental impacts. Temperature changes are found in the vicinity of wind farms and previous simulations have suggested that large-scale wind farms could alter regional climate. However, assessments of the effects of realistic wind power development scenarios at the scale of a continent are missing. Here we simulate the impacts of current and near-future wind energy production according to European Union energy and climate policies. We use a regional climate model describing the interactions between turbines and the atmosphere, and find limited impacts. A statistically significant signal is only found in winter, with changes within ±0.3 °C and within 0-5% for precipitation. It results from the combination of local wind farm effects and changes due to a weak, but robust, anticyclonic-induced circulation over Europe. However, the impacts remain much weaker than the natural climate interannual variability and changes expected from greenhouse gas emissions.

  12. Regional climate model simulations indicate limited climatic impacts by operational and planned European wind farms

    NASA Astrophysics Data System (ADS)

    Vautard, Robert; Thais, Françoise; Tobin, Isabelle; Bréon, François-Marie; de Lavergne, Jean-Guy Devezeaux; Colette, Augustin; Yiou, Pascal; Ruti, Paolo Michele

    2014-02-01

    The rapid development of wind energy has raised concerns about environmental impacts. Temperature changes are found in the vicinity of wind farms and previous simulations have suggested that large-scale wind farms could alter regional climate. However, assessments of the effects of realistic wind power development scenarios at the scale of a continent are missing. Here we simulate the impacts of current and near-future wind energy production according to European Union energy and climate policies. We use a regional climate model describing the interactions between turbines and the atmosphere, and find limited impacts. A statistically significant signal is only found in winter, with changes within ±0.3 °C and within 0-5% for precipitation. It results from the combination of local wind farm effects and changes due to a weak, but robust, anticyclonic-induced circulation over Europe. However, the impacts remain much weaker than the natural climate interannual variability and changes expected from greenhouse gas emissions.

  13. 75 FR 25785 - Airworthiness Directives; BAE Systems (Operations) Limited Model 4101 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-10

    ... Aircraft Flight Manual (AFM) limitation instructing the flight crew to taxi with the condition lever at... Propeller Warning Placard and implementation of a corresponding ] Aircraft Flight Manual (AFM) limitation... the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations...

  14. 75 FR 61982 - Airworthiness Directives; BAE Systems (Operations) Limited Model 4101 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-07

    ... and implementation of a corresponding Aircraft Flight Manual (AFM) limitation instructing the flight... of a corresponding Aircraft Flight Manual (AFM) limitation, instructing the flight crew to taxi with... that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce...

  15. 76 FR 19716 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Model 4101 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-08

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; BAE SYSTEMS...: * * * BAE Systems (Operations) Ltd has issued Revision 33 of the AMM to amend Chapter 05-10-10 by adding one..., except Federal holidays. For service information identified in this proposed AD, contact BAE...

  16. 77 FR 20572 - Airworthiness Directives; BAE Systems (Operations) Limited Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-05

    ... Directives; BAE Systems (Operations) Limited Airplanes AGENCY: Federal Aviation Administration (FAA), DOT... (AD) for certain BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 and Model Avro 146-RJ airplanes. This... information identified in this proposed AD, contact BAE SYSTEMS (Operations) Limited, Customer...

  17. 14 CFR 23.1583 - Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Operating Limitations and Information Airplane Flight Manual and Approved Manual Material § 23.1583 Operating limitations. The Airplane... airplanes— (i) The maximum operating limit speed, VMO/MMO and a statement that this speed must not...

  18. 14 CFR 23.1583 - Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Operating Limitations and Information Airplane Flight Manual and Approved Manual Material § 23.1583 Operating limitations. The Airplane... airplanes— (i) The maximum operating limit speed, VMO/MMO and a statement that this speed must not...

  19. 14 CFR 23.1583 - Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Operating Limitations and Information Airplane Flight Manual and Approved Manual Material § 23.1583 Operating limitations. The Airplane... airplanes— (i) The maximum operating limit speed, VMO/MMO and a statement that this speed must not...

  20. 14 CFR 23.1583 - Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Operating Limitations and Information Airplane Flight Manual and Approved Manual Material § 23.1583 Operating limitations. The Airplane... airplanes— (i) The maximum operating limit speed, VMO/MMO and a statement that this speed must not...

  1. Computational Modeling to Limit the Impact Displays and Indicator Lights Have on Habitable Volume Operational Lighting Constraints

    NASA Technical Reports Server (NTRS)

    Clark, T. E.; Salazr, G. A; Brainard, G. C.

    2016-01-01

    The goal of this investigation is to determine design limitations and architectural solutions that limit the impact light from displays and indicator lamps have on the operational environment task lighting and lighting countermeasure spectrum constraints. It is concerning that this innovative architectural lighting system, could be compromised by spectrums from display systems, architectural materials, and structures that are not considered as part a full system design implementation. The introduction of many Commercial Off the Shelf (COTS) products to the spacecraft volume that contain LEDs, without consideration to the human factors and biological constraints, is another problem. Displays and indicators are a necessary part of the spacecraft and it is the goal of this research project to determine constraints and solutions that allow these systems to be integrated while minimizing how the lighting environment is modified by them. Due to the potentially broad scope of this endeavor, the project team developed constraints for the evaluation. The evaluation will be on a set of tasks that required significant exposure in the same environment while having a large chance of impacting the light spectrum the crew is expected to receive from the architectural lighting system. The team plans to use recent HRP research on "Net Habitable Volume" [1] to provide the boundary conditions for volume size. A Zemax ® lighting model was developed of a small enclosure that had high intensity overhead lighting and a standard intensity display with LED indicator arrays. The computer model demonstrated a work surface illuminated at a high level by the overhead light source compared to displays and indicators whose light is parallel to the work plane. The overhead lighting oversaturated spectral contributions from the display and indicator at the task work surface. Interestingly, when the observer looked at the displays and LEDs within the small enclosure, their spectral contribution

  2. 75 FR 49365 - Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146-100A and -200A Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-13

    ... profile of the aeroplane type concluded that its proven short field performance has increasingly been... profile of the aeroplane type concluded that its proven short field performance has increasingly been.... (2) For service information identified in this AD, contact BAE Systems (Operations) Limited,...

  3. 14 CFR 23.1583 - Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Operating Limitations and Information Airplane Flight Manual and Approved Manual Material § 23.1583 Operating limitations. Link to an amendment published at 76 FR 75763, December 2, 2011. The Airplane Flight Manual must contain...

  4. 14 CFR 27.1583 - Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ....1583 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Manual and Approved Manual Material § 27.1583 Operating limitations. (a) Airspeed and rotor limitations... limiting factors must be furnished. (Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act...

  5. 14 CFR 27.1583 - Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ....1583 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Manual and Approved Manual Material § 27.1583 Operating limitations. (a) Airspeed and rotor limitations... limiting factors must be furnished. (Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act...

  6. 14 CFR 27.1583 - Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ....1583 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Manual and Approved Manual Material § 27.1583 Operating limitations. (a) Airspeed and rotor limitations... limiting factors must be furnished. (Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act...

  7. 14 CFR 27.1583 - Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ....1583 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Manual and Approved Manual Material § 27.1583 Operating limitations. (a) Airspeed and rotor limitations... limiting factors must be furnished. (Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act...

  8. 14 CFR 27.1583 - Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ....1583 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Manual and Approved Manual Material § 27.1583 Operating limitations. (a) Airspeed and rotor limitations... limiting factors must be furnished. (Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act...

  9. 14 CFR 101.13 - Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... BALLOONS Moored Balloons and Kites § 101.13 Operating limitations. (a) Except as provided in paragraph (b... ground visibility is less than three miles; or (4) Within five miles of the boundary of any airport. (b) Paragraph (a) of this section does not apply to the operation of a balloon or kite below the top of...

  10. 14 CFR 101.13 - Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Operating limitations. 101.13 Section 101.13 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  11. 14 CFR 101.33 - Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Operating limitations. 101.33 Section 101.33 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  12. 14 CFR 101.33 - Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Operating limitations. 101.33 Section 101.33 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  13. 14 CFR 101.13 - Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Operating limitations. 101.13 Section 101.13 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  14. 14 CFR 101.13 - Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Operating limitations. 101.13 Section 101.13 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  15. 14 CFR 101.33 - Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Operating limitations. 101.33 Section 101.33 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  16. 14 CFR 101.33 - Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Operating limitations. 101.33 Section 101.33 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  17. 14 CFR 101.33 - Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Operating limitations. 101.33 Section 101.33 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  18. 14 CFR 101.13 - Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Operating limitations. 101.13 Section 101.13 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED...

  19. Computational Modeling to Limit the Impact Displays and Indicator Lights Have on Habitable Volume Operational Lighting Constraints

    NASA Technical Reports Server (NTRS)

    Clark, T. A.; Brainard, G.; Salazar, G.; Johnston, S.; Schwing, B.; Litaker, H.; Kolomenski, A.; Venus, D.; Tran, K.; Hanifin, J.; Adolf, J.

    2017-01-01

    system, surface reflectance, and display and indicator implementation all factor into the users' spectral environment. A variety of low-cost solutions exist to mitigate the impact of light from non-architectural lighting systems, and much potential for system automation and integration of display systems with the ambient environment. This team believes that proper planning can be used to avoid integration problems and also believes that human-in-the-loop evaluations, real-world test and measurement, and computer modeling can be used to determine how changes to a process, display graphics, and architecture will help maintain the planned spectral operating lighting environment.

  20. Limit circuit prevents overdriving of operational amplifier

    NASA Technical Reports Server (NTRS)

    Openshaw, F. L.

    1967-01-01

    Cutoff-type high gain amplifier coupled by a diode prevents overdriving of operational amplifier. An amplified feedback signal offsets the excess input signal that tends to cause the amplifier to exceed its preset limit. The output is, therfore, held to the set clamp level.

  1. 14 CFR 29.1583 - Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... information must be furnished to allow compliance with § 29.1517. (g) Maximum allowable wind. For Category A rotorcraft, the maximum allowable wind for safe operation near the ground must be furnished. (h) Altitude. The altitude established under § 29.1527 and an explanation of the limiting factors must be...

  2. 14 CFR 29.1583 - Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... information must be furnished to allow compliance with § 29.1517. (g) Maximum allowable wind. For Category A rotorcraft, the maximum allowable wind for safe operation near the ground must be furnished. (h) Altitude. The altitude established under § 29.1527 and an explanation of the limiting factors must be...

  3. 14 CFR 29.1583 - Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... information must be furnished to allow compliance with § 29.1517. (g) Maximum allowable wind. For Category A rotorcraft, the maximum allowable wind for safe operation near the ground must be furnished. (h) Altitude. The altitude established under § 29.1527 and an explanation of the limiting factors must be...

  4. 75 FR 38953 - Airworthiness Directives; BAE Systems (OPERATIONS) LIMITED Model BAe 146 and Avro 146-RJ Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-07

    ... (Operations) Ltd issued Inspection Service Bulletin (SB) 32-158. This SB was classified mandatory by the UK... Inspection Service Bulletin (SB) 32-158. This SB was classified mandatory by the UK Civil Aviation Authority... (SB) 32-158. This SB was classified mandatory by the UK Civil Aviation Authority under AD number...

  5. 14 CFR 121.207 - Provisionally certificated airplanes: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Provisionally certificated airplanes... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.207 Provisionally certificated airplanes: Operating limitations....

  6. 14 CFR 121.207 - Provisionally certificated airplanes: Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Provisionally certificated airplanes... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.207 Provisionally certificated airplanes: Operating limitations....

  7. 78 FR 58960 - Airworthiness Directives; BAE SYSTEMS (OPERATIONS) LIMITED Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-25

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; BAE SYSTEMS... rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes. This proposed...

  8. 14 CFR 25.1505 - Maximum operating limit speed.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Maximum operating limit speed. 25.1505... Operating Limitations § 25.1505 Maximum operating limit speed. The maximum operating limit speed (V MO/M MO airspeed or Mach Number, whichever is critical at a particular altitude) is a speed that may not...

  9. 14 CFR 25.1505 - Maximum operating limit speed.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Maximum operating limit speed. 25.1505... Operating Limitations § 25.1505 Maximum operating limit speed. The maximum operating limit speed (V MO/M MO airspeed or Mach Number, whichever is critical at a particular altitude) is a speed that may not...

  10. Model Misunderstandings. Teach the Limitations.

    ERIC Educational Resources Information Center

    Schamp, Homer W., Jr.

    1990-01-01

    Discussed is the idea that models should be taught by emphasizing limitations rather than focusing on their generality. Two examples of gas behavior models are included--the kinetic and static models. (KR)

  11. Operator spin foam models

    NASA Astrophysics Data System (ADS)

    Bahr, Benjamin; Hellmann, Frank; Kamiński, Wojciech; Kisielowski, Marcin; Lewandowski, Jerzy

    2011-05-01

    The goal of this paper is to introduce a systematic approach to spin foams. We define operator spin foams, that is foams labelled by group representations and operators, as our main tool. A set of moves we define in the set of the operator spin foams (among other operations) allows us to split the faces and the edges of the foams. We assign to each operator spin foam a contracted operator, by using the contractions at the vertices and suitably adjusted face amplitudes. The emergence of the face amplitudes is the consequence of assuming the invariance of the contracted operator with respect to the moves. Next, we define spin foam models and consider the class of models assumed to be symmetric with respect to the moves we have introduced, and assuming their partition functions (state sums) are defined by the contracted operators. Briefly speaking, those operator spin foam models are invariant with respect to the cellular decomposition, and are sensitive only to the topology and colouring of the foam. Imposing an extra symmetry leads to a family we call natural operator spin foam models. This symmetry, combined with assumed invariance with respect to the edge splitting move, determines a complete characterization of a general natural model. It can be obtained by applying arbitrary (quantum) constraints on an arbitrary BF spin foam model. In particular, imposing suitable constraints on a spin(4) BF spin foam model is exactly the way we tend to view 4D quantum gravity, starting with the BC model and continuing with the Engle-Pereira-Rovelli-Livine (EPRL) or Freidel-Krasnov (FK) models. That makes our framework directly applicable to those models. Specifically, our operator spin foam framework can be translated into the language of spin foams and partition functions. Among our natural spin foam models there are the BF spin foam model, the BC model, and a model corresponding to the EPRL intertwiners. Our operator spin foam framework can also be used for more general spin

  12. 14 CFR 25.1583 - Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... distribution. The weight and center of gravity limitations established under § 25.1519 must be furnished in the... weight and center of gravity limits, and to maintain the loading within these limits in flight. (3) If certification for more than one center of gravity range is requested, the appropriate limitations, with...

  13. 76 FR 18618 - Operating Limitations at Newark Liberty International Airport

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-04

    ... Federal Aviation Administration Operating Limitations at Newark Liberty International Airport AGENCY... amends the Order Limiting Operations at Newark Liberty International Airport (EWR) that published on May... Management Rule for LaGuardia Airport, John F. Kennedy International Airport, and Newark...

  14. 40 CFR Table 2 to Subpart Nnnnn of... - Operating Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 14 2010-07-01 2010-07-01 false Operating Limits 2 Table 2 to Subpart..., Table 2 Table 2 to Subpart NNNNN of Part 63—Operating Limits As stated in § 63.9000(b), you must comply with the following operating limits for each emission stream that is part of an affected source that...

  15. 40 CFR Table 2 to Subpart Aaaaa of... - Operating Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 13 2010-07-01 2010-07-01 false Operating Limits 2 Table 2 to Subpart.... AAAAA, Table 2 Table 2 to Subpart AAAAA of Part 63—Operating Limits As required in § 63.7090(b), you must meet each operating limit in the following table that applies to you. For . . . You must . . ....

  16. 14 CFR 101.23 - General operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.23 General operating limitations. (a) You must operate an amateur rocket...

  17. 14 CFR 101.23 - General operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.23 General operating limitations. (a) You must operate an amateur rocket...

  18. 14 CFR 101.23 - General operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.23 General operating limitations. (a) You must operate an amateur rocket...

  19. 14 CFR 101.23 - General operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.23 General operating limitations. (a) You must operate an amateur rocket...

  20. 14 CFR 101.23 - General operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.23 General operating limitations. (a) You must operate an amateur rocket...

  1. Rotorwash Operational Footprint Modeling

    DTIC Science & Technology

    2014-07-01

    lower drag coefficient . The developed analytical model for predicting unbalance is shown to correlate relatively well with the test data. This model... coefficients and exponents within the equations. Correlation of RoWFoot to flight test data is fundamental to quantitatively trying to determine the...using empirically derived coefficients and exponents through feedback from an iterative flight test correlation process. Rotorwash Operational

  2. Operations planning simulation: Model study

    NASA Technical Reports Server (NTRS)

    1974-01-01

    The use of simulation modeling for the identification of system sensitivities to internal and external forces and variables is discussed. The technique provides a means of exploring alternate system procedures and processes, so that these alternatives may be considered on a mutually comparative basis permitting the selection of a mode or modes of operation which have potential advantages to the system user and the operator. These advantages are measurements is system efficiency are: (1) the ability to meet specific schedules for operations, mission or mission readiness requirements or performance standards and (2) to accomplish the objectives within cost effective limits.

  3. Receiver operating characteristic-curve limits of detection

    NASA Astrophysics Data System (ADS)

    Wysoczanski, Artur; Voigtman, Edward

    2014-10-01

    Using a simple UV LED-excited ruby fluorescence measurement system, we demonstrate that it is easily possible to obtain unbiased detection limits, despite the system deliberately having non-linear response function and non-Gaussian noise. Even when the noise precision model is heteroscedastic, but otherwise only roughly linear, the receiver operating characteristic (ROC) method readily yields results that are in accordance with a priori canonical specifications of false positives and false negatives at the detection limit. The present work demonstrates that obtaining unbiased detection limits is not abstruse and need not be mathematically complicated. Rather, detection limits continue to serve a useful purpose as part of the characterization of chemical measurement systems.

  4. 14 CFR 25.1583 - Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... engine powers. (5) The landing gear operating speed or speeds, and a statement explaining the speeds as defined in § 25.1515(a). (6) The landing gear extended speed V LE, if greater than V LO, and a statement that this is the maximum speed at which the airplane can be safely flown with the landing gear...

  5. 14 CFR 25.1583 - Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... positions and engine powers. (5) The landing gear operating speed or speeds, and a statement explaining the speeds as defined in § 25.1515(a). (6) The landing gear extended speed V LE, if greater than V LO, and a statement that this is the maximum speed at which the airplane can be safely flown with the landing...

  6. 14 CFR 35.5 - Propeller ratings and operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... AIRCRAFT AIRWORTHINESS STANDARDS: PROPELLERS General § 35.5 Propeller ratings and operating limitations. (a) Propeller ratings and operating limitations must: (1) Be established by the applicant and approved by the... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Propeller ratings and operating...

  7. 14 CFR 91.315 - Limited category civil aircraft: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Limited category civil aircraft: Operating limitations. 91.315 Section 91.315 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES GENERAL OPERATING AND FLIGHT RULES Special Flight Operations § 91.315...

  8. 14 CFR 91.325 - Primary category aircraft: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Primary category aircraft: Operating limitations. 91.325 Section 91.325 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES GENERAL OPERATING AND FLIGHT RULES Special Flight Operations § 91.325...

  9. 14 CFR 91.325 - Primary category aircraft: Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Primary category aircraft: Operating... Flight Operations § 91.325 Primary category aircraft: Operating limitations. (a) No person may operate a primary category aircraft carrying persons or property for compensation or hire. (b) No person may...

  10. 14 CFR 91.325 - Primary category aircraft: Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Primary category aircraft: Operating... Flight Operations § 91.325 Primary category aircraft: Operating limitations. (a) No person may operate a primary category aircraft carrying persons or property for compensation or hire. (b) No person may...

  11. 76 FR 73477 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-29

    ... Systems (Operations) Limited has amended the AMM to remove the life limits on shock absorber assemblies, but not the individual shock absorber components, and amend the life limits on the different standards... 104, dated April 15, 2011, to remove life limits on shock absorber assemblies, but not the...

  12. Limited field investigation for the 200-UP-1 operable unit

    SciTech Connect

    1996-11-01

    The 200-UP-1 Groundwater Operable Unit is located in the southern portion of the 200 West Area on the Hanford Site in Washington State. The operable unit is located adjacent to the 200-ZP-1 Groundwater Operable Unit and underlies a significant part of seven source operable units: 200-RO-1, 200-RO-2, 200-RO-3, 200-RO-4, 200-SS-2, 200-UP-2, and 200-UP-3. Remedial efforts in the 100-ZP-1 Operable Unit focus on addressing volatile organic contamination in the aquifer. The focus of the 200-UP-1 limited field investigation (LFI) is on contaminated aquifer soils and groundwater within its boundary, with the exception of uranium and technetium-99 plumes, which are addressed by an existing 200-UP-1 interim remedial measure (IRM). The LFI approach is driven by general and specific data needs required to refine the site conceptual model and conduct a risk assessment. Activities supporting the LFI include drilling, well construction, sampling and analysis, data validation, geologic and geophysical logging, aquifer testing, measuring depth to water, and evaluating geodetic survey and existing analytical data.

  13. 40 CFR Table 3 to Subpart Jjjjjj... - Operating Limits for Boilers With Emission Limits

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 15 2014-07-01 2014-07-01 false Operating Limits for Boilers With..., Commercial, and Institutional Boilers Area Sources Pt. 63, Subpt. JJJJJJ, Table 3 Table 3 to Subpart JJJJJJ of Part 63—Operating Limits for Boilers With Emission Limits As stated in § 63.11201, you must...

  14. 40 CFR Table 3 to Subpart Jjjjjj... - Operating Limits for Boilers With Emission Limits

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 15 2013-07-01 2013-07-01 false Operating Limits for Boilers With..., Commercial, and Institutional Boilers Area Sources Pt. 63, Subpt. JJJJJJ, Table 3 Table 3 to Subpart JJJJJJ of Part 63—Operating Limits for Boilers With Emission Limits As stated in § 63.11201, you must...

  15. 40 CFR Table 3 to Subpart Jjjjjj... - Operating Limits for Boilers With Emission Limits

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 15 2012-07-01 2012-07-01 false Operating Limits for Boilers With..., Commercial, and Institutional Boilers Area Sources Pt. 63, Subpt. JJJJJJ, Table 3 Table 3 to Subpart JJJJJJ of Part 63—Operating Limits for Boilers With Emission Limits As stated in § 63.11201, you must...

  16. 40 CFR Table 3 to Subpart Jjjjjj... - Operating Limits for Boilers With Emission Limits

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 14 2011-07-01 2011-07-01 false Operating Limits for Boilers With..., Commercial, and Institutional Boilers Area Sources Pt. 63, Subpt. JJJJJJ, Table 3 Table 3 to Subpart JJJJJJ of Part 63—Operating Limits for Boilers With Emission Limits As stated in § 63.11201, you must...

  17. Operations and Modeling Analysis

    NASA Technical Reports Server (NTRS)

    Ebeling, Charles

    2005-01-01

    The Reliability and Maintainability Analysis Tool (RMAT) provides NASA the capability to estimate reliability and maintainability (R&M) parameters and operational support requirements for proposed space vehicles based upon relationships established from both aircraft and Shuttle R&M data. RMAT has matured both in its underlying database and in its level of sophistication in extrapolating this historical data to satisfy proposed mission requirements, maintenance concepts and policies, and type of vehicle (i.e. ranging from aircraft like to shuttle like). However, a companion analyses tool, the Logistics Cost Model (LCM) has not reached the same level of maturity as RMAT due, in large part, to nonexistent or outdated cost estimating relationships and underlying cost databases, and it's almost exclusive dependence on Shuttle operations and logistics cost input parameters. As a result, the full capability of the RMAT/LCM suite of analysis tools to take a conceptual vehicle and derive its operations and support requirements along with the resulting operating and support costs has not been realized.

  18. Limitations of bootstrap current models

    NASA Astrophysics Data System (ADS)

    Belli, E. A.; Candy, J.; Meneghini, O.; Osborne, T. H.

    2014-04-01

    We assess the accuracy and limitations of two analytic models of the tokamak bootstrap current: (1) the well-known Sauter model (1999 Phys. Plasmas 6 2834, 2002 Phys. Plasmas 9 5140) and (2) a recent modification of the Sauter model by Koh et al (2012 Phys. Plasmas 19 072505). For this study, we use simulations from the first-principles kinetic code NEO as the baseline to which the models are compared. Tests are performed using both theoretical parameter scans as well as core-to-edge scans of real DIII-D and NSTX plasma profiles. The effects of extreme aspect ratio, large impurity fraction, energetic particles, and high collisionality are studied. In particular, the error in neglecting cross-species collisional coupling—an approximation inherent to both analytic models—is quantified. Furthermore, the implications of the corrections from kinetic NEO simulations on MHD equilibrium reconstructions is studied via integrated modeling with kinetic EFIT.

  19. Automated operations planning: Modeling MLRS operations

    SciTech Connect

    Cunningham, C.T.

    1992-03-05

    The multiples launch rocket system (MLRS) is a highly survivable and automated complement to conventional cannon artillery. For best survivability against counter-battery fire, MLRS operations rely on rapid shoot-and-scoot'' tactics by widely dispersed launchers. Such tactics may be difficult to include in a battlefield simulation without requiring players for the individual MLRS items: launchers and resupply vehicles. To reduce this demand on player resources, a computer model has been developed to automate the behavior of the items, consistent with the published operations doctrine. A player is required to determine the area of operation and certain key locations for an MLRS firing platoon. Analysis of trafficability in the operations area and direction the movement of the items, as the perform fire missions, resupply, and replenishment of platoon stocks, is completely automated. A finite state machine representation of the items is used. The model is currently implemented on a VAX 6310. It will be integrated with the Janus battlefield trainer.

  20. Automated operations planning: Modeling MLRS operations

    SciTech Connect

    Cunningham, C.T.

    1992-03-05

    The multiples launch rocket system (MLRS) is a highly survivable and automated complement to conventional cannon artillery. For best survivability against counter-battery fire, MLRS operations rely on rapid ``shoot-and-scoot`` tactics by widely dispersed launchers. Such tactics may be difficult to include in a battlefield simulation without requiring players for the individual MLRS items: launchers and resupply vehicles. To reduce this demand on player resources, a computer model has been developed to automate the behavior of the items, consistent with the published operations doctrine. A player is required to determine the area of operation and certain key locations for an MLRS firing platoon. Analysis of trafficability in the operations area and direction the movement of the items, as the perform fire missions, resupply, and replenishment of platoon stocks, is completely automated. A finite state machine representation of the items is used. The model is currently implemented on a VAX 6310. It will be integrated with the Janus battlefield trainer.

  1. Operating limit evaluation for disposal of uranium enrichment plant wastes

    SciTech Connect

    Lee, D.W.; Kocher, D.C.; Wang, J.C.

    1996-02-01

    A proposed solid waste landfill at Paducah Gaseous Diffusion Plant (PGDP) will accept wastes generated during normal plant operations that are considered to be non-radioactive. However, nearly all solid waste from any source or facility contains small amounts of radioactive material, due to the presence in most materials of trace quantities of such naturally occurring radionuclides as uranium and thorium. This paper describes an evaluation of operating limits, which are protective of public health and the environment, that would allow waste materials containing small amounts of radioactive material to be sent to a new solid waste landfill at PGDP. The operating limits are expressed as limits on concentrations of radionuclides in waste materials that could be sent to the landfill based on a site-specific analysis of the performance of the facility. These limits are advantageous to PGDP and DOE for several reasons. Most importantly, substantial cost savings in the management of waste is achieved. In addition, certain liabilities that could result from shipment of wastes to a commercial off-site solid waste landfill are avoided. Finally, assurance that disposal operations at the PGDP landfill are protective of public health and the environment is provided by establishing verifiable operating limits for small amounts of radioactive material; rather than relying solely on administrative controls. The operating limit determined in this study has been presented to the Commonwealth of Kentucky and accepted as a condition to be attached to the operating permit for the solid waste landfill.

  2. Small-scale (flash) flood early warning in the light of operational requirements: opportunities and limits with regard to user demands, driving data, and hydrologic modeling techniques

    NASA Astrophysics Data System (ADS)

    Philipp, Andy; Kerl, Florian; Büttner, Uwe; Metzkes, Christine; Singer, Thomas; Wagner, Michael; Schütze, Niels

    2016-05-01

    In recent years, the Free State of Saxony (Eastern Germany) was repeatedly hit by both extensive riverine flooding, as well as flash flood events, emerging foremost from convective heavy rainfall. Especially after a couple of small-scale, yet disastrous events in 2010, preconditions, drivers, and methods for deriving flash flood related early warning products are investigated. This is to clarify the feasibility and the limits of envisaged early warning procedures for small catchments, hit by flashy heavy rain events. Early warning about potentially flash flood prone situations (i.e., with a suitable lead time with regard to required reaction-time needs of the stakeholders involved in flood risk management) needs to take into account not only hydrological, but also meteorological, as well as communication issues. Therefore, we propose a threefold methodology to identify potential benefits and limitations in a real-world warning/reaction context. First, the user demands (with respect to desired/required warning products, preparation times, etc.) are investigated. Second, focusing on small catchments of some hundred square kilometers, two quantitative precipitation forecasts are verified. Third, considering the user needs, as well as the input parameter uncertainty (i.e., foremost emerging from an uncertain QPF), a feasible, yet robust hydrological modeling approach is proposed on the basis of pilot studies, employing deterministic, data-driven, and simple scoring methods.

  3. Cam-operated limit switch features safe fuse replacement

    NASA Technical Reports Server (NTRS)

    Weber, G. J.

    1965-01-01

    Two hermetically sealed, short travel, limit switches permit fuse replacement without danger of a spark or arcing. The switches are wired in parallel circuits and actuated by manually operated cams containing the circuit fuses.

  4. Beam dynamics limits for low-energy RHIC operation

    SciTech Connect

    Fedotov,A.V.; Ben-Zvi, I.; Chang, X.; Kayran, D.; Litvinenko, V.N.; Pozdeyev, E.; Satogata, T.

    2008-08-25

    There is a strong interest in low-energy RHIC operations in the single-beam total energy range of 2.5-25 GeV/nucleon [1-3]. Collisions in this energy range, much of which is below nominal RHIC injection energy, will help to answer one of the key questions in the field of QCD about the existence and location of a critical point on the QCD phase diagram [4]. There have been several short test runs during 2006-2008 RHIC operations to evaluate RHIC operational challenges at these low energies [5]. Beam lifetimes observed during the test runs were limited by machine nonlinearities. This performance limit can be improved with sufficient machine tuning. The next luminosity limitation comes from transverse and longitudinal Intra-beam Scattering (IBS), and ultimately from the space-charge limit. Here we summarize dynamic effects limiting beam lifetime and possible improvement with electron cooling.

  5. 14 CFR 33.7 - Engine ratings and operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... time allowed; (iii) Hydraulic fluid of a supersonic engine; (iv) Fuel at a location specified by the... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Engine ratings and operating limitations... AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES General § 33.7 Engine ratings and operating...

  6. 40 CFR Table 6 to Subpart Jjjjjj... - Establishing Operating Limits

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Dry sorbent or activated carbon injection rate operating parameters Establish a site-specific minimum sorbent or activated carbon injection rate operating limit according to § 63.11211(b) Data from the sorbent or activated carbon injection rate monitors and the mercury performance stack tests (a) You...

  7. 76 FR 16240 - Mandatory Reliability Standards for Interconnection Reliability Operating Limits

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-23

    ... system operating limits other than interconnection reliability operating limits. DATES: Effective Date.... Documented Methodology to Identify System 33 Operating Limit Information 3. Current Practices for the... for the reliability coordinator to monitor and analyze system operating limits (SOL) \\4\\ other...

  8. Modeling Limited Foresight in Water Management Systems

    NASA Astrophysics Data System (ADS)

    Howitt, R.

    2005-12-01

    The inability to forecast future water supplies means that their management inevitably occurs under situations of limited foresight. Three modeling problems arise, first what type of objective function is a manager with limited foresight optimizing? Second how can we measure these objectives? Third can objective functions that incorporate uncertainty be integrated within the structure of optimizing water management models? The paper reviews the concepts of relative risk aversion and intertemporal substitution that underlie stochastic dynamic preference functions. Some initial results from the estimation of such functions for four different dam operations in northern California are presented and discussed. It appears that the path of previous water decisions and states influences the decision-makers willingness to trade off water supplies between periods. A compromise modeling approach that incorporates carry-over value functions under limited foresight within a broader net work optimal water management model is developed. The approach uses annual carry-over value functions derived from small dimension stochastic dynamic programs embedded within a larger dimension water allocation network. The disaggregation of the carry-over value functions to the broader network is extended using the space rule concept. Initial results suggest that the solution of such annual nonlinear network optimizations is comparable to, or faster than, the solution of linear network problems over long time series.

  9. Operational models of infrastructure resilience.

    PubMed

    Alderson, David L; Brown, Gerald G; Carlyle, W Matthew

    2015-04-01

    We propose a definition of infrastructure resilience that is tied to the operation (or function) of an infrastructure as a system of interacting components and that can be objectively evaluated using quantitative models. Specifically, for any particular system, we use quantitative models of system operation to represent the decisions of an infrastructure operator who guides the behavior of the system as a whole, even in the presence of disruptions. Modeling infrastructure operation in this way makes it possible to systematically evaluate the consequences associated with the loss of infrastructure components, and leads to a precise notion of "operational resilience" that facilitates model verification, validation, and reproducible results. Using a simple example of a notional infrastructure, we demonstrate how to use these models for (1) assessing the operational resilience of an infrastructure system, (2) identifying critical vulnerabilities that threaten its continued function, and (3) advising policymakers on investments to improve resilience.

  10. Tractor controls actuating force limits for Indian operators.

    PubMed

    Mehta, C R; Pandey, M M; Tiwari, P S; Gite, L P; Khadatkar, Abhijit

    2011-01-01

    In four-wheel tractors, proper design of controls is important for comfortable and safe operation of the tractor. The design involves location and dimensions of controls as well as strength limits for operating these controls. The present study was aimed to quantify human strength for operation of tractor controls and to recommend the maximum control actuating forces for normal operation of tractors based on strength capability of 3,423 Indian male agricultural workers. The 5th percentile values of strength parameters i.e. leg strength sitting (left and right), foot strength sitting (right), torque strength (both hands) sitting, push strength (left hand and right hand) sitting and pull strength (left hand and right hand) sitting of agricultural workers collected using a strength measurement set-up were taken into consideration for the study. It was recommended that the maximum actuating forces for normal operation of frequently operated brake and clutch pedals of tractors should not exceed 260 N and 125 N based on 5th percentile values of right and left leg strength of male agricultural workers, respectively. The maximum actuating force required in steering wheel operation should not exceed 51 N based on 5th percentile value of torque strength (both hands) sitting of workers. The maximum actuating forces required for operating frequently operated levers viz. gear selection, speed selection, hydraulic control and hand throttle of Indian tractors should not exceed 46 N, 46 N, 25 N and 25 N, respectively. It may be concluded that the maximum actuating force limits as given in Bureau of Indian Standards IS 10703 are very high as compared to the findings of the study based on strength data of Indian male operators, which highlight the need to revise the standard.

  11. 77 FR 29914 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-21

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; BAE SYSTEMS... rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all BAE SYSTEMS... information identified in this proposed AD, contact BAE SYSTEMS (Operations) Limited, Customer...

  12. 14 CFR 125.221 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Equipment Requirements § 125.221 Icing conditions: Operating limitations. (a) No pilot may take off an... pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot has completed the testing required under §...

  13. 14 CFR 125.221 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Equipment Requirements § 125.221 Icing conditions: Operating limitations. (a) No pilot may take off an... pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot has completed the testing required under §...

  14. 14 CFR 125.221 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Equipment Requirements § 125.221 Icing conditions: Operating limitations. (a) No pilot may take off an... pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot has completed the testing required under §...

  15. 14 CFR 125.221 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Equipment Requirements § 125.221 Icing conditions: Operating limitations. (a) No pilot may take off an... pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot has completed the testing required under §...

  16. 40 CFR 60.3033 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false How do I demonstrate continuous... Units That Commenced Construction On or Before December 9, 2004 Model Rule-Continuous Compliance... operating limits? (a) You must conduct an annual performance test for all of the pollutants in table 2...

  17. One-loop corrections to h → boverline{b} and h → τ overline{τ} decays in the Standard Model dimension-6 EFT: four-fermion operators and the large- m t limit

    NASA Astrophysics Data System (ADS)

    Gauld, Rhorry; Pecjak, Benjamin D.; Scott, Darren J.

    2016-05-01

    We calculate a set of one-loop corrections to h → boverline{b} and h → τ overline{τ} decays in the dimension-6 Standard Model effective field theory (SMEFT). In particular, working in the limit of vanishing gauge couplings, we calculate directly in the broken phase of the theory all large logarithmic corrections and in addition the finite corrections in the large- m t limit. Moreover, we give exact results for one-loop contributions from four-fermion operators. We obtain these corrections within an extension of the widely used on-shell renormalisation scheme appropriate for SMEFT calculations, and show explicitly how UV divergent bare amplitudes from a total of 21 different SMEFT operators are rendered finite within this scheme. As a by-product of the calculation, we also compute to one-loop order the logarithmically enhanced and finite large- m t corrections to muon decay in the limit of vanishing gauge couplings, which is necessary to implement the G F input parameter scheme within the SMEFT.

  18. Limitations of modeling snow in ski resorts

    NASA Astrophysics Data System (ADS)

    Steiger, Robert; Abegg, Bruno

    2016-04-01

    The body of literature on snow modeling in a ski area operations context has been growing over the last decades in an accelerating speed. The majority of snow model applications for ski areas can be found in the climate change impacts literature. These studies differ in many aspects: the type of model used; the meteorological variables used in the models; the spatial and temporal resolution of the meteorological variables; the method how the climate change signal is derived and applied in the model concept; the number of climate models and emission scenarios used and consequently the handling of uncertainties; the indicators used to interpret the impacts for the skiing tourism industry; the incorporation of adaptation measures (e.g. snowmaking); and the geographical scale of analysis. In this contribution we will present a review of approaches used for modeling snow conditions in a ski area context. The major limitations both from a scientific as well as from a users' perspective will be discussed and solutions for shortcomings of existing approaches will be presented.

  19. 40 CFR Table 5 to Subpart Jjjjj of... - Continuous Compliance With Emission Limits and Operating Limits

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... operating limits . . . You must demonstrate continuous compliance by . . . 1. Kiln equipped with a DLA Each... kilns equipped with a DLA i. Collecting the DLA pressure drop data according to § 63.8450(a); reducing... CFR part 60, appendix A; maintaining no VE from the DLA stack. 2. Kiln equipped with a DIFF or...

  20. 40 CFR Table 6 to Subpart Zzzz of... - Continuous Compliance With Emission Limitations and Operating Limitations

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... stationary RICE >500 HP located at a major source a. Reduce CO emissions and using an oxidation catalyst, and... percent reduction is achieved a; and ii. Collecting the catalyst inlet temperature data according to § 63... rolling averages within the operating limitations for the catalyst inlet temperature; and v. Measuring...

  1. Chapter 3: MHD stability, operational limits and disruptions

    NASA Astrophysics Data System (ADS)

    Hender, T. C.; Wesley, J. C.; Bialek, J.; Bondeson, A.; Boozer, A. H.; Buttery, R. J.; Garofalo, A.; Goodman, T. P.; Granetz, R. S.; Gribov, Y.; Gruber, O.; Gryaznevich, M.; Giruzzi, G.; Günter, S.; Hayashi, N.; Helander, P.; Hegna, C. C.; Howell, D. F.; Humphreys, D. A.; Huysmans, G. T. A.; Hyatt, A. W.; Isayama, A.; Jardin, S. C.; Kawano, Y.; Kellman, A.; Kessel, C.; Koslowski, H. R.; La Haye, R. J.; Lazzaro, E.; Liu, Y. Q.; Lukash, V.; Manickam, J.; Medvedev, S.; Mertens, V.; Mirnov, S. V.; Nakamura, Y.; Navratil, G.; Okabayashi, M.; Ozeki, T.; Paccagnella, R.; Pautasso, G.; Porcelli, F.; Pustovitov, V. D.; Riccardo, V.; Sato, M.; Sauter, O.; Schaffer, M. J.; Shimada, M.; Sonato, P.; Strait, E. J.; Sugihara, M.; Takechi, M.; Turnbull, A. D.; Westerhof, E.; Whyte, D. G.; Yoshino, R.; Zohm, H.; ITPA MHD, the; Disruption; Magnetic Control Topical Group

    2007-06-01

    ameliorate the consequences of MHD instabilities, there has been significant progress in improving physics understanding and modelling. This progress has been in areas including the mechanisms governing NTM growth and seeding, in understanding the damping controlling RWM stability and in modelling RWM feedback schemes. For disruptions there has been continued progress on the instability mechanisms that underlie various classes of disruption, on the detailed modelling of halo currents and forces and in refining predictions of quench rates and disruption power loads. Overall the studies reviewed in this chapter demonstrate that MHD instabilities can be controlled, avoided or ameliorated to the extent that they should not compromise ITER operation, though they will necessarily impose a range of constraints.

  2. 40 CFR 63.2346 - What emission limitations, operating limits, and work practice standards must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... limits, and work practice standards must I meet? 63.2346 Section 63.2346 Protection of Environment... Liquids Distribution (Non-Gasoline) Emission Limitations, Operating Limits, and Work Practice Standards § 63.2346 What emission limitations, operating limits, and work practice standards must I meet?...

  3. 40 CFR 63.2346 - What emission limitations, operating limits, and work practice standards must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... limits, and work practice standards must I meet? 63.2346 Section 63.2346 Protection of Environment... Liquids Distribution (Non-Gasoline) Emission Limitations, Operating Limits, and Work Practice Standards § 63.2346 What emission limitations, operating limits, and work practice standards must I meet?...

  4. 40 CFR 63.2346 - What emission limitations, operating limits, and work practice standards must I meet?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... limits, and work practice standards must I meet? 63.2346 Section 63.2346 Protection of Environment... Pollutants: Organic Liquids Distribution (Non-Gasoline) Emission Limitations, Operating Limits, and Work Practice Standards § 63.2346 What emission limitations, operating limits, and work practice standards...

  5. 40 CFR 63.6603 - What emission limitations and operating limitations must I meet if I own or operate an existing...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... operating limitations must I meet if I own or operate an existing stationary RICE located at an area source... operating limitations must I meet if I own or operate an existing stationary RICE located at an area source... procedures in § 63.6620 and Table 4 to this subpart. (a) If you own or operate an existing stationary...

  6. Operating limitations of high speed jet lubricated ball bearings

    NASA Technical Reports Server (NTRS)

    Zaretsky, E. V.; Signer, H.; Bamberger, E. N.

    1975-01-01

    A parametric study was performed with 120-mm bore angular-contact ball bearings having a nominal contact angle of 20 degrees. The bearings had either an inner- or an outer-race land riding cage, and lubrication was by recirculating oil jets which had either a single or dual orifice. Thrust load, speed, and lubricant flow rate were varied. Test results were compared with those previously reported and obtained from bearings of the same design which were under-race lubricated but run under the same conditions. Jet lubricated ball bearings were limited to speeds less than 2,500,000 DN, and bearings having inner-race land riding cages produced lower temperatures than bearings with outer-race land riding cages. For a given lubricant flow rate dual orifice jets produced lower bearing temperatures than single orifice jets, but under-race lubrication produced lower bearing temperatures under all conditions of operation with no apparent bearing speed limitation.

  7. Beam lifetime and limitations during low-energy RHIC operation

    SciTech Connect

    Fedotov, A.V.; Bai, M.; Blaskiewicz, M.; Fischer, W.; Kayran, D.; Montag, C.; Satogata, T.; Tepikian, S.; Wang, G.

    2011-03-28

    The low-energy physics program at the Relativistic Heavy Ion Collider (RHIC), motivated by a search for the QCD phase transition critical point, requires operation at low energies. At these energies, large nonlinear magnetic field errors and large beam sizes produce low beam lifetimes. A variety of beam dynamics effects such as Intrabeam Scattering (IBS), space charge and beam-beam forces also contribute. All these effects are important to understand beam lifetime limitations in RHIC at low energies. During the low-energy RHIC physics run in May-June 2010 at beam {gamma} = 6.1 and {gamma} = 4.1, gold beam lifetimes were measured for various values of space-charge tune shifts, transverse acceptance limitation by collimators, synchrotron tunes and RF voltage. This paper summarizes our observations and initial findings.

  8. 40 CFR 63.4092 - What operating limits must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Large Appliances Emission Limitations § 63.4092 What operating limits must I meet? (a) For any coating operation(s) on which you use the compliant... operating limits. (b) For any controlled coating operation(s) on which you use the emission rate with...

  9. 40 CFR 63.4492 - What operating limits must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Standards for Hazardous Air Pollutants for Surface Coating of Plastic Parts and Products Emission Limitations § 63.4492 What operating limits must I meet? (a) For any coating operation(s) on which you use the... any operating limits. (b) For any controlled coating operation(s) on which you use the emission...

  10. 40 CFR 63.4092 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Large Appliances Emission Limitations § 63.4092 What operating limits must I meet? (a) For any coating operation(s) on which you use the compliant... operating limits. (b) For any controlled coating operation(s) on which you use the emission rate with...

  11. 40 CFR 63.4492 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Standards for Hazardous Air Pollutants for Surface Coating of Plastic Parts and Products Emission Limitations § 63.4492 What operating limits must I meet? (a) For any coating operation(s) on which you use the... any operating limits. (b) For any controlled coating operation(s) on which you use the emission...

  12. 40 CFR 63.4692 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Wood Building Products Emission Limitations § 63.4692 What operating limits must I meet? (a) For any coating operation(s) on which you use the compliant... operating limits. (b) For any controlled coating operation(s) on which you use the emission rate with...

  13. 40 CFR 60.4860 - Do the emission limits, emission standards, and operating limits apply during periods of startup...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false Do the emission limits, emission standards, and operating limits apply during periods of startup, shutdown, and malfunction? 60.4860 Section... emission limits, emission standards, and operating limits apply during periods of startup, shutdown,...

  14. Risk management model of winter navigation operations.

    PubMed

    Valdez Banda, Osiris A; Goerlandt, Floris; Kuzmin, Vladimir; Kujala, Pentti; Montewka, Jakub

    2016-07-15

    The wintertime maritime traffic operations in the Gulf of Finland are managed through the Finnish-Swedish Winter Navigation System. This establishes the requirements and limitations for the vessels navigating when ice covers this area. During winter navigation in the Gulf of Finland, the largest risk stems from accidental ship collisions which may also trigger oil spills. In this article, a model for managing the risk of winter navigation operations is presented. The model analyses the probability of oil spills derived from collisions involving oil tanker vessels and other vessel types. The model structure is based on the steps provided in the Formal Safety Assessment (FSA) by the International Maritime Organization (IMO) and adapted into a Bayesian Network model. The results indicate that ship independent navigation and convoys are the operations with higher probability of oil spills. Minor spills are most probable, while major oil spills found very unlikely but possible.

  15. 40 CFR 63.6603 - What emission limitations and operating limitations must I meet if I own or operate an existing...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... operating limitations must I meet if I own or operate an existing stationary CI RICE located at an area... and operating limitations must I meet if I own or operate an existing stationary CI RICE located at an... stationary CI RICE located at an area source of HAP emissions, you must comply with the requirements in...

  16. Modeling operators' emergency response time for chemical processing operations.

    PubMed

    Murray, Susan L; Harputlu, Emrah; Mentzer, Ray A; Mannan, M Sam

    2014-01-01

    Operators have a crucial role during emergencies at a variety of facilities such as chemical processing plants. When an abnormality occurs in the production process, the operator often has limited time to either take corrective actions or evacuate before the situation becomes deadly. It is crucial that system designers and safety professionals can estimate the time required for a response before procedures and facilities are designed and operations are initiated. There are existing industrial engineering techniques to establish time standards for tasks performed at a normal working pace. However, it is reasonable to expect the time required to take action in emergency situations will be different than working at a normal production pace. It is possible that in an emergency, operators will act faster compared to a normal pace. It would be useful for system designers to be able to establish a time range for operators' response times for emergency situations. This article develops a modeling approach to estimate the time standard range for operators taking corrective actions or following evacuation procedures in emergency situations. This will aid engineers and managers in establishing time requirements for operators in emergency situations. The methodology used for this study combines a well-established industrial engineering technique for determining time requirements (predetermined time standard system) and adjustment coefficients for emergency situations developed by the authors. Numerous videos of workers performing well-established tasks at a maximum pace were studied. As an example, one of the tasks analyzed was pit crew workers changing tires as quickly as they could during a race. The operations in these videos were decomposed into basic, fundamental motions (such as walking, reaching for a tool, and bending over) by studying the videos frame by frame. A comparison analysis was then performed between the emergency pace and the normal working pace operations

  17. 40 CFR 63.3492 - What operating limits must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Metal Cans Emission Limitations § 63.3492 What operating limits must I meet? (a) For any coating operation(s) on which you use the compliant material... limits. (b) For any controlled coating operation(s) on which you use the emission rate with...

  18. 40 CFR 63.3492 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Metal Cans Emission Limitations § 63.3492 What operating limits must I meet? (a) For any coating operation(s) on which you use the compliant material... limits. (b) For any controlled coating operation(s) on which you use the emission rate with...

  19. 40 CFR 63.4292 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Limitations § 63.4292 What operating limits must I meet? (a) For any web coating/printing operation, slashing operation, or dyeing/finishing operation on which you use the compliant material option; web coating..., you are not required to meet any operating limits. (b) For any controlled web...

  20. Transonic limit cycle oscillation analysis using reduced order aerodynamic models

    NASA Astrophysics Data System (ADS)

    Dowell, E. H.; Thomas, J. P.; Hall, K. C.

    2004-01-01

    Limit cycle oscillations have been observed in flight operations of modern aircraft, wind tunnel experiments and mathematical models. Both fluid and structural nonlinearities are thought to contribute to these phenomena. With recent advances in reduced order aerodynamic modeling, it is now feasible to analyze limit cycle oscillations that may occur in transonic flow including the effects of structural and fluid nonlinearities. In this paper an airfoil with control surface freeplay (a common structural nonlinearity) is used to investigate transonic flutter and limit cycle oscillations. The reduced order aerodynamic model used in this paper assumes the shock motion is small and in proportion to the structural motions.

  1. 40 CFR 63.10021 - How do I demonstrate continuous compliance with the emission limitations, operating limits, and...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... compliance with each emissions limit, operating limit, and work practice standard in Tables 1 through 4 to this subpart that applies to you, according to the monitoring specified in Tables 6 and 7 to this... you use a PM CPMS data to measure compliance with an operating limit in Table 4 to this subpart,...

  2. 40 CFR 63.10021 - How do I demonstrate continuous compliance with the emission limitations, operating limits, and...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... compliance with each emissions limit, operating limit, and work practice standard in Tables 1 through 4 to this subpart that applies to you, according to the monitoring specified in Tables 6 and 7 to this... you use a PM CPMS data to measure compliance with an operating limit in Table 4 to this subpart,...

  3. Hanford defined waste model limitations and improvements

    SciTech Connect

    HARMSEN, R.W.

    1999-02-24

    Recommendation 93-5 Implementation Plan, Milestone 5,6.3.1.i requires issuance of this report which addresses ''updates to the tank contents model''. This report summarizes the review of the Hanford Defined Waste, Revision 4, model limitations and provides conclusions and recommendations for potential updates to the model.

  4. 40 CFR 63.6603 - What emission limitations and operating limitations must I meet if I own or operate an existing...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... limitations must I meet if I own or operate an existing stationary RICE located at an area source of HAP... limitations must I meet if I own or operate an existing stationary RICE located at an area source of HAP....6620 and Table 4 to this subpart. (a) If you own or operate an existing stationary RICE located at...

  5. Predicting tool operator capacity to react against torque within acceptable handle deflection limits in automotive assembly.

    PubMed

    Radwin, Robert G; Chourasia, Amrish; Fronczak, Frank J; Subedi, Yashpal; Howery, Robert; Yen, Thomas Y; Sesto, Mary E; Irwin, Curtis B

    2016-05-01

    The proportion of tool operators capable of maintaining published psychophysically derived threaded fastener tool handle deflection limits were predicted using a biodynamic tool operator model, interacting with the tool, task and workstation. Tool parameters, including geometry, speed and torque were obtained from the specifications for 35 tools used in an auto assembly plant. Tool mass moments of inertia were measured for these tools using a novel device that engages the tool in a rotating system of known inertia. Task parameters, including fastener target torque and joint properties (soft, medium or hard), were ascertained from the vehicle design specifications. Workstation parameters, including vertical and horizontal distances from the operator were measured using a laser rangefinder for 69 tool installations in the plant. These parameters were entered into the model and tool handle deflection was predicted for each job. While handle deflection for most jobs did not exceed the capacity of 75% females and 99% males, six jobs exceeded the deflection criterion. Those tool installations were examined and modifications in tool speed and operator position improved those jobs within the deflection limits, as predicted by the model. We conclude that biodynamic tool operator models may be useful for identifying stressful tool installations and interventions that bring them within the capacity of most operators.

  6. 40 CFR Table 23 to Subpart Uuu of... - Operating Limits for Inorganic HAP Emission Limitations for Catalytic Reforming Units

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... meet this operating limit during coke burn-off and catalyst rejuvenation . . . 1. Wet scrubber The... concentration in the catalyst regenerator exhaust gas must not exceed the limit established during...

  7. Lunar Landing Operational Risk Model

    NASA Technical Reports Server (NTRS)

    Mattenberger, Chris; Putney, Blake; Rust, Randy; Derkowski, Brian

    2010-01-01

    Characterizing the risk of spacecraft goes beyond simply modeling equipment reliability. Some portions of the mission require complex interactions between system elements that can lead to failure without an actual hardware fault. Landing risk is currently the least characterized aspect of the Altair lunar lander and appears to result from complex temporal interactions between pilot, sensors, surface characteristics and vehicle capabilities rather than hardware failures. The Lunar Landing Operational Risk Model (LLORM) seeks to provide rapid and flexible quantitative insight into the risks driving the landing event and to gauge sensitivities of the vehicle to changes in system configuration and mission operations. The LLORM takes a Monte Carlo based approach to estimate the operational risk of the Lunar Landing Event and calculates estimates of the risk of Loss of Mission (LOM) - Abort Required and is Successful, Loss of Crew (LOC) - Vehicle Crashes or Cannot Reach Orbit, and Success. The LLORM is meant to be used during the conceptual design phase to inform decision makers transparently of the reliability impacts of design decisions, to identify areas of the design which may require additional robustness, and to aid in the development and flow-down of requirements.

  8. CORSICA modelling of ITER hybrid operation scenarios

    NASA Astrophysics Data System (ADS)

    Kim, S. H.; Bulmer, R. H.; Campbell, D. J.; Casper, T. A.; LoDestro, L. L.; Meyer, W. H.; Pearlstein, L. D.; Snipes, J. A.

    2016-12-01

    The hybrid operating mode observed in several tokamaks is characterized by further enhancement over the high plasma confinement (H-mode) associated with reduced magneto-hydro-dynamic (MHD) instabilities linked to a stationary flat safety factor (q ) profile in the core region. The proposed ITER hybrid operation is currently aiming at operating for a long burn duration (>1000 s) with a moderate fusion power multiplication factor, Q , of at least 5. This paper presents candidate ITER hybrid operation scenarios developed using a free-boundary transport modelling code, CORSICA, taking all relevant physics and engineering constraints into account. The ITER hybrid operation scenarios have been developed by tailoring the 15 MA baseline ITER inductive H-mode scenario. Accessible operation conditions for ITER hybrid operation and achievable range of plasma parameters have been investigated considering uncertainties on the plasma confinement and transport. ITER operation capability for avoiding the poloidal field coil current, field and force limits has been examined by applying different current ramp rates, flat-top plasma currents and densities, and pre-magnetization of the poloidal field coils. Various combinations of heating and current drive (H&CD) schemes have been applied to study several physics issues, such as the plasma current density profile tailoring, enhancement of the plasma energy confinement and fusion power generation. A parameterized edge pedestal model based on EPED1 added to the CORSICA code has been applied to hybrid operation scenarios. Finally, fully self-consistent free-boundary transport simulations have been performed to provide information on the poloidal field coil voltage demands and to study the controllability with the ITER controllers. Extended from Proc. 24th Int. Conf. on Fusion Energy (San Diego, 2012) IT/P1-13.

  9. Operating limit study for the proposed solid waste landfill at Paducah Gaseous Diffusion Plant

    SciTech Connect

    Lee, D.W.; Wang, J.C.; Kocher, D.C.

    1995-06-01

    A proposed solid waste landfill at Paducah Gaseous Diffusion Plant (PGDP) would accept wastes generated during normal operations that are identified as non-radioactive. These wastes may include small amounts of radioactive material from incidental contamination during plant operations. A site-specific analysis of the new solid waste landfill is presented to determine a proposed operating limit that will allow for waste disposal operations to occur such that protection of public health and the environment from the presence of incidentally contaminated waste materials can be assured. Performance objectives for disposal were defined from existing regulatory guidance to establish reasonable dose limits for protection of public health and the environment. Waste concentration limits were determined consistent with these performance objectives for the protection of off-site individuals and inadvertent intruders who might be directly exposed to disposed wastes. Exposures of off-site individuals were estimated using a conservative, site-specific model of the groundwater transport of contamination from the wastes. Direct intrusion was analyzed using an agricultural homesteader scenario. The most limiting concentrations from direct intrusion or groundwater transport were used to establish the concentration limits for radionuclides likely to be present in PGDP wastes.

  10. 40 CFR 63.6640 - How do I demonstrate continuous compliance with the emission limitations and operating limitations?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... emission limitation applicable to your stationary RICE. (c) (d) For new, reconstructed, and rebuilt stationary RICE, deviations from the emission or operating limitations that occur during the first 200 hours of operation from engine startup (engine burn-in period) are not violations. Rebuilt stationary...

  11. 40 CFR Table 2 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Particulate Matter Emission Limits

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 13 2011-07-01 2011-07-01 false Operating Limits for Boilers and... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 2 Table 2 to Subpart DDDDD of Part 63—Operating Limits for Boilers and...

  12. 40 CFR Table 4 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Hydrogen Chloride Emission Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 13 2010-07-01 2010-07-01 false Operating Limits for Boilers and... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 4 Table 4 to Subpart DDDDD of Part 63—Operating Limits for Boilers and...

  13. 40 CFR Table 4 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Hydrogen Chloride Emission Limits

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 14 2012-07-01 2011-07-01 true Operating Limits for Boilers and... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 4 Table 4 to Subpart DDDDD of Part 63—Operating Limits for Boilers and...

  14. 40 CFR Table 4 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Hydrogen Chloride Emission Limits

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 13 2011-07-01 2011-07-01 false Operating Limits for Boilers and... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 4 Table 4 to Subpart DDDDD of Part 63—Operating Limits for Boilers and...

  15. 40 CFR Table 2 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Particulate Matter Emission Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 13 2010-07-01 2010-07-01 false Operating Limits for Boilers and... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 2 Table 2 to Subpart DDDDD of Part 63—Operating Limits for Boilers and...

  16. 40 CFR Table 2 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Particulate Matter Emission Limits

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 14 2012-07-01 2011-07-01 true Operating Limits for Boilers and... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 2 Table 2 to Subpart DDDDD of Part 63—Operating Limits for Boilers and...

  17. 40 CFR 62.14635 - What operating limits must I meet and by when?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... POLLUTANTS Federal Plan Requirements for Commercial and Industrial Solid Waste Incineration Units That Commenced Construction On or Before November 30, 1999 Emission Limitations and Operating Limits §...

  18. Lean blowout limits of a gas turbine combustor operated with aviation fuel and methane

    NASA Astrophysics Data System (ADS)

    Xiao, Wei; Huang, Yong

    2016-05-01

    Lean blowout (LBO) limits is critical to the operational performance of combustion systems in propulsion and power generation. The swirl cup plays an important role in flame stability and has been widely used in aviation engines. Therefore, the effects of swirl cup geometry and flow dynamics on LBO limits are significant. An experiment was conducted for studying the lean blowout limits of a single dome rectangular model combustor with swirl cups. Three types of swirl cup (dual-axial swirl cup, axial-radial swirl cup, dual-radial swirl cup) were employed in the experiment which was operated with aviation fuel (Jet A-1) and methane under the idle condition. Experimental results showed that, with using both Jet A-1 and methane, the LBO limits increase with the air flow of primary swirler for dual-radial swirl cup, while LBO limits decrease with the air flow of primary swirler for dual-axial swirl cup. In addition, LBO limits increase with the swirl intensity for three swirl cups. The experimental results also showed that the flow dynamics instead of atomization poses a significant influence on LBO limits. An improved semi-empirical correlation of experimental data was derived to predict the LBO limits for gas turbine combustors.

  19. 78 FR 44469 - Airworthiness Directives; BAE Systems (Operations) Limited Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-24

    ... airworthiness limitations that require new life limits on certain main landing gear (MLG) components. Since we issued that AD, we have determined that reduced safe life limits on certain nose landing gear (NLG... landing gear in accordance with Messier-Dowty Service Bulletin 146-32-171, dated August 11, 2009,...

  20. 40 CFR Table 23 to Subpart Uuu of... - Operating Limits for Inorganic HAP Emission Limitations for Catalytic Reforming Units

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Sulfur Recovery Units Pt. 63, Subpt. UUU, Table 23 Table 23 to Subpart UUU of Part 63—Operating Limits... recommended limit (1.35 weight percent for the Chlorsorb TM System); and the weekly average chloride level on... limit (1.8 weight percent for the Chlorsorb TM System)....

  1. 40 CFR 63.9810 - How do I demonstrate continuous compliance with the emission limits, operating limits, and work...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... compliance with the emission limits, operating limits, and work practice standards? 63.9810 Section 63.9810..., and work practice standards? (a) You must demonstrate continuous compliance with each emission limit... this subpart. (c) You must demonstrate continuous compliance with each work practice standard...

  2. Laser Performance Operations Model (LPOM)

    SciTech Connect

    Shaw, M; Williams, W; House, R; Haynam, C

    2004-01-07

    The Laser Performance Operations Model (LPOM) has been developed to provide real time predictive capabilities for the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. LPOM uses diagnostic feedback from previous NIF shots to maintain accurate energetics models for each of the 192 NIF beamlines (utilizing one CPU per laser beamline). This model is used to determine the system setpoints (initial power, waveplate attenuations, laser diagnostic settings) required for all requested NIF shots. In addition, LPOM employs optical damage models to minimize the probability that a proposed shot may damage the system. LPOM provides post-shot diagnostic reporting to support the NIF community. LPOM was deployed prior to the first main laser shots in NIF, and has since been used to set up every shot in NIF's first quad (four beamlines). Real-time adjustments of the codes energetics parameters allows the LPOM to predict total energies within 5%, and provide energy balance within the four beamlines to within 2% for shots varying from 0.5 to 26 kJ (1.053 {micro}m) per beamline. The LPOM has been a crucial tool in the commissioning of the first quad of NIF.

  3. Laser Performance Operations Model (LPOM)

    SciTech Connect

    Shaw, M; Williams, W; House, R; Haynam, C

    2004-06-04

    The Laser Performance Operations Model (LPOM) has been developed to provide real time predictive capabilities for the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. LPOM uses diagnostic feedback from previous NIF shots to maintain accurate energetics models for each of the 192 NIF beamlines (utilizing one CPU per laser beamline). This model is used to determine the system setpoints (initial power, waveplate attenuations, laser diagnostic settings) required for all requested NIF shots. In addition, LPOM employs optical damage models to minimize the probability that a proposed shot may damage the system. LPOM provides post-shot diagnostic reporting to support the NIF community. LPOM was deployed prior to the first main laser shots in NIF, and has since been used to set up every shot in NIF's first quad (four beamlines). Real-time adjustments of the codes energetics parameters allows the LPOM to predict total energies within 5%, and provide energy balance within the four beamlines to within 2% for shots varying from 0.5 to 26 kJ (1.053 {micro}m) per beamline. The LPOM has been a crucial tool in the commissioning of the first quad of NIF.

  4. 76 FR 42534 - Mandatory Reliability Standards for Interconnection Reliability Operating Limits; System...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-19

    ... Reliability Operating Limits; System Restoration Reliability Standards AGENCY: Federal Energy Regulatory... necessary to analyze and monitor Interconnection Reliability Operating Limits (IROL) within its Wide-Area... Interconnection Reliability Operating Limits, Order No. 748, 134 FERC ] 61,213 (2011). \\2\\ The term...

  5. 40 CFR Table 2 to Subpart Sssss of... - Operating Limits

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... operating temperature at the inlet of the catalyst bed of the oxidizer at or above the minimum allowable... activity level of the catalyst at least every 12 months. 7. Each affected batch process unit For each batch..., maintain the hourly average operating temperature at the inlet of the catalyst bed at or above the...

  6. 40 CFR Table 2 to Subpart Sssss of... - Operating Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... operating temperature at the inlet of the catalyst bed of the oxidizer at or above the minimum allowable... activity level of the catalyst at least every 12 months. 7. Each affected batch process unit For each batch..., maintain the hourly average operating temperature at the inlet of the catalyst bed at or above the...

  7. 40 CFR Table 2 to Subpart Sssss of... - Operating Limits

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... operating temperature at the inlet of the catalyst bed of the oxidizer at or above the minimum allowable... activity level of the catalyst at least every 12 months. 7. Each affected batch process unit For each batch..., maintain the hourly average operating temperature at the inlet of the catalyst bed at or above the...

  8. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  9. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  10. 40 CFR Table 2 to Subpart Ppppp of... - Operating Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... before the catalyst bed in any 3-hour period must not fall below the limit established according to § 63... block averages; and iii. Maintaining the 3-hour average temperature before the catalyst bed at or above the temperature limit. b. Either ensure that the average temperature difference across the...

  11. 40 CFR Table 2 to Subpart Ppppp of... - Operating Limits

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... before the catalyst bed in any 3-hour period must not fall below the limit established according to § 63... block averages; and iii. Maintaining the 3-hour average temperature before the catalyst bed at or above the temperature limit. b. Either ensure that the average temperature difference across the...

  12. 40 CFR Table 2 to Subpart Ppppp of... - Operating Limits

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... before the catalyst bed in any 3-hour period must not fall below the limit established according to § 63... block averages; and iii. Maintaining the 3-hour average temperature before the catalyst bed at or above the temperature limit. b. Either ensure that the average temperature difference across the...

  13. Terahertz generation in GaN diodes operating in pulsed regime limited by self-heating

    NASA Astrophysics Data System (ADS)

    Barry, E. A.; Sokolov, V. N.; Kim, K. W.; Trew, R. J.

    2009-06-01

    The conditions for pulsed regime operation of terahertz power generation in vertical nanoscale GaN-based diodes are investigated via self-consistent simulation of the high-field electron transport in the active channel and thermal transport in the entire device structure. The combined electrothermal model allows for a detailed analysis of the dynamical local distributions of the electric field, drift-velocity, and lattice temperature. We show that stable generation is achievable with a self-heating limited output power of 2.25 W at an operation frequency of 0.71 THz for a pulse width of 3 ns with a few tens of nanosecond duty cycle.

  14. 40 CFR Table 2 to Subpart Jjjjj of... - Operating Limits

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... average scrubber liquid pH for each 3-hour block period at or above the average scrubber liquid pH... corrective actions in accordance with your OM&M plan; operate and maintain the fabric filter such that...

  15. 40 CFR 62.14670 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Industrial Solid Waste Incineration Units That Commenced Construction On or Before November 30, 1999.... Operating limits do not apply during performance tests. (c) You must only burn the same types of waste...

  16. 40 CFR 62.14670 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Industrial Solid Waste Incineration Units That Commenced Construction On or Before November 30, 1999.... Operating limits do not apply during performance tests. (c) You must only burn the same types of waste...

  17. 40 CFR 63.3093 - What operating limits must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Automobiles and Light-Duty Trucks Emission... for any coating operation(s) without add-on controls. (b) Except as provided in paragraph (d) of this section, for any controlled coating operation(s), you must meet the operating limits specified in Table...

  18. 40 CFR 63.3093 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Standards for Hazardous Air Pollutants: Surface Coating of Automobiles and Light-Duty Trucks Emission... for any coating operation(s) without add-on controls. (b) Except as provided in paragraph (d) of this section, for any controlled coating operation(s), you must meet the operating limits specified in Table...

  19. 40 CFR Table 4 of Subpart Aaaaaaa... - Operating Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... filter or fiber bed filter a. Inlet gas temperature b, andb. Pressure drop across device b The 3-hour... temperature and pressure drop, you can use a leak detection system that identifies when the filter media has... (b)(3).The 3-hour average pressure drop across the device within the approved operating...

  20. 77 FR 13228 - Airworthiness Directives; BAE SYSTEMS (Operations) Limited Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-06

    ... wing rear spar. This proposed AD would require a one-time detailed inspection for cracks, corrosion, and other defects of the rear face of the wing rear spar, and repair if necessary. We are proposing... found on a wing rear spar by an operator during a fuel leak investigation. The cracks were...

  1. 14 CFR 33.7 - Engine ratings and operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... operation in each supercharger mode as applicable). (2) Fuel grade or specification. (3) Oil grade or specification. (4) Temperature of the— (i) Cylinder; (ii) Oil at the oil inlet; and (iii) Turbosupercharger turbine wheel inlet gas. (5) Pressure of— (i) Fuel at the fuel inlet; and (ii) Oil at the main oil...

  2. 14 CFR 33.7 - Engine ratings and operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... operation in each supercharger mode as applicable). (2) Fuel grade or specification. (3) Oil grade or specification. (4) Temperature of the— (i) Cylinder; (ii) Oil at the oil inlet; and (iii) Turbosupercharger turbine wheel inlet gas. (5) Pressure of— (i) Fuel at the fuel inlet; and (ii) Oil at the main oil...

  3. 40 CFR Table 2 to Subpart Ppppp of... - Operating Limits

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... static pressure in each duct between a capture device and add-on control device inlet in any 3-hour period must not fall below the average volumetric flow rate or duct static pressure limit established for that capture device according § 63.9306(d) i. Collecting the gas volumetric flow rate or duct...

  4. 40 CFR Table 2 to Subpart Ppppp of... - Operating Limits

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    .... Reducing the data to 3-hour block averages; and iii. Maintaining the 3-hour average combustion temperature at or above the temperature limit. 2. Catalytic oxidizer a. The average temperature measured just... block averages; and iii. Maintaining the 3-hour average temperature before the catalyst bed at or...

  5. 14 CFR 135.227 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... limitations. (a) No pilot may take off an aircraft that has frost, ice, or snow adhering to any rotor blade... may authorize an airplane to take off and no pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot...

  6. 14 CFR 135.227 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... limitations. (a) No pilot may take off an aircraft that has frost, ice, or snow adhering to any rotor blade... may authorize an airplane to take off and no pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot...

  7. 14 CFR 135.227 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... limitations. Link to an amendment published at 74 FR 62696, Dec. 1, 2009. (a) No pilot may take off an... authorized by the Administrator. (b) No certificate holder may authorize an airplane to take off and no pilot... expected to adhere to the airplane unless the pilot has completed all applicable training as required...

  8. 14 CFR 135.227 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... limitations. (a) No pilot may take off an aircraft that has frost, ice, or snow adhering to any rotor blade... may authorize an airplane to take off and no pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot...

  9. 14 CFR 135.227 - Icing conditions: Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... limitations. (a) No pilot may take off an aircraft that has frost, ice, or snow adhering to any rotor blade... may authorize an airplane to take off and no pilot may take off an airplane any time conditions are such that frost, ice, or snow may reasonably be expected to adhere to the airplane unless the pilot...

  10. 40 CFR Table 2 to Subpart Yyyy of... - Operating Limitations

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... catalyst maintain the 4-hour rolling average of the catalyst inlet temperature within the range suggested by the catalyst manufacturer. 2. each stationary combustion turbine that is required to comply with the emission limitation for formaldehyde and is not using an oxidation catalyst maintain any...

  11. 40 CFR Table 2 to Subpart Yyyy of... - Operating Limitations

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... catalyst maintain the 4-hour rolling average of the catalyst inlet temperature within the range suggested by the catalyst manufacturer. 2. each stationary combustion turbine that is required to comply with the emission limitation for formaldehyde and is not using an oxidation catalyst maintain any...

  12. 40 CFR Table 2 to Subpart Yyyy of... - Operating Limitations

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... using an oxidation catalyst maintain the 4-hour rolling average of the catalyst inlet temperature within the range suggested by the catalyst manufacturer. 2. each stationary combustion turbine that is required to comply with the emission limitation for formaldehyde and is not using an oxidation...

  13. 40 CFR Table 2 to Subpart Yyyy of... - Operating Limitations

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... using an oxidation catalyst maintain the 4-hour rolling average of the catalyst inlet temperature within the range suggested by the catalyst manufacturer. 2. each stationary combustion turbine that is required to comply with the emission limitation for formaldehyde and is not using an oxidation...

  14. 40 CFR Table 2 to Subpart Yyyy of... - Operating Limitations

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... using an oxidation catalyst maintain the 4-hour rolling average of the catalyst inlet temperature within the range suggested by the catalyst manufacturer. 2. each stationary combustion turbine that is required to comply with the emission limitation for formaldehyde and is not using an oxidation...

  15. Magnetically operated limit switch has improved reliability, minimizes arcing

    NASA Technical Reports Server (NTRS)

    Steiner, R.

    1966-01-01

    Limit switch for reliable, low-travel, snap action with negligible arcing uses an electrically nonconductive permanent magnet consisting of a ferrimagnetic ceramic and ferromagnetic pole shoes which form a magnetic and electrically conductive circuit with a ferrous-metal armature.

  16. Reusable Rocket Engine Operability Modeling and Analysis

    NASA Technical Reports Server (NTRS)

    Christenson, R. L.; Komar, D. R.

    1998-01-01

    This paper describes the methodology, model, input data, and analysis results of a reusable launch vehicle engine operability study conducted with the goal of supporting design from an operations perspective. Paralleling performance analyses in schedule and method, this requires the use of metrics in a validated operations model useful for design, sensitivity, and trade studies. Operations analysis in this view is one of several design functions. An operations concept was developed given an engine concept and the predicted operations and maintenance processes incorporated into simulation models. Historical operations data at a level of detail suitable to model objectives were collected, analyzed, and formatted for use with the models, the simulations were run, and results collected and presented. The input data used included scheduled and unscheduled timeline and resource information collected into a Space Transportation System (STS) Space Shuttle Main Engine (SSME) historical launch operations database. Results reflect upon the importance not only of reliable hardware but upon operations and corrective maintenance process improvements.

  17. 40 CFR 63.6603 - What emission limitations, operating limitations, and other requirements must I meet if I own or...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... limitations, and other requirements must I meet if I own or operate an existing stationary RICE located at an... existing stationary RICE located at an area source of HAP emissions? Compliance with the numerical emission... or operate an existing stationary RICE located at an area source of HAP emissions, you must...

  18. 40 CFR 63.6603 - What emission limitations, operating limitations, and other requirements must I meet if I own or...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... limitations, and other requirements must I meet if I own or operate an existing stationary RICE located at an... existing stationary RICE located at an area source of HAP emissions? Compliance with the numerical emission... or operate an existing stationary RICE located at an area source of HAP emissions, you must...

  19. 40 CFR 63.2346 - What emission limitations, operating limits, and work practice standards must I meet?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 13 2012-07-01 2012-07-01 false What emission limitations, operating limits, and work practice standards must I meet? 63.2346 Section 63.2346 Protection of Environment... gas systems or back into a process as specified in 40 CFR part 63, subpart SS. (3) Comply with 40...

  20. 40 CFR Table 23 to Subpart Uuu of... - Operating Limits for Inorganic HAP Emission Limitations for Catalytic Reforming Units

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... adsorption system must not exceed the design or manufacturer's recommended limit (1.8 weight percent for the... 40 Protection of Environment 12 2011-07-01 2009-07-01 true Operating Limits for Inorganic HAP... Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur...

  1. 40 CFR 60.3023 - What operating limits must I meet and by when?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false What operating limits must I meet and... Compliance Times for Other Solid Waste Incineration Units That Commenced Construction On or Before December 9... operating limits for four operating parameters (as specified in table 3 of this subpart) as described...

  2. 14 CFR 135.397 - Small transport category airplane performance operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Small transport category airplane... PERSONS ON BOARD SUCH AIRCRAFT Airplane Performance Operating Limitations § 135.397 Small transport category airplane performance operating limitations. (a) No person may operate a reciprocating...

  3. 14 CFR 135.397 - Small transport category airplane performance operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Small transport category airplane... PERSONS ON BOARD SUCH AIRCRAFT Airplane Performance Operating Limitations § 135.397 Small transport category airplane performance operating limitations. (a) No person may operate a reciprocating...

  4. 14 CFR 135.399 - Small nontransport category airplane performance operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Small nontransport category airplane... PERSONS ON BOARD SUCH AIRCRAFT Airplane Performance Operating Limitations § 135.399 Small nontransport category airplane performance operating limitations. (a) No person may operate a reciprocating engine...

  5. 14 CFR 135.399 - Small nontransport category airplane performance operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Small nontransport category airplane... PERSONS ON BOARD SUCH AIRCRAFT Airplane Performance Operating Limitations § 135.399 Small nontransport category airplane performance operating limitations. (a) No person may operate a reciprocating engine...

  6. 14 CFR 91.1055 - Pilot operating limitations and pairing requirement.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Pilot operating limitations and pairing... Ownership Operations Program Management § 91.1055 Pilot operating limitations and pairing requirement. (a... aircraft being flown, and the pilot in command is not an appropriately qualified check pilot, the pilot...

  7. 14 CFR 91.1055 - Pilot operating limitations and pairing requirement.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Pilot operating limitations and pairing... Ownership Operations Program Management § 91.1055 Pilot operating limitations and pairing requirement. (a... aircraft being flown, and the pilot in command is not an appropriately qualified check pilot, the pilot...

  8. 14 CFR 91.1055 - Pilot operating limitations and pairing requirement.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Pilot operating limitations and pairing... Ownership Operations Program Management § 91.1055 Pilot operating limitations and pairing requirement. (a... aircraft being flown, and the pilot in command is not an appropriately qualified check pilot, the pilot...

  9. 14 CFR 91.1055 - Pilot operating limitations and pairing requirement.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Pilot operating limitations and pairing... Ownership Operations Program Management § 91.1055 Pilot operating limitations and pairing requirement. (a... aircraft being flown, and the pilot in command is not an appropriately qualified check pilot, the pilot...

  10. 14 CFR 91.1055 - Pilot operating limitations and pairing requirement.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Pilot operating limitations and pairing... Ownership Operations Program Management § 91.1055 Pilot operating limitations and pairing requirement. (a... aircraft being flown, and the pilot in command is not an appropriately qualified check pilot, the pilot...

  11. A posteriori operation detection in evolving software models

    PubMed Central

    Langer, Philip; Wimmer, Manuel; Brosch, Petra; Herrmannsdörfer, Markus; Seidl, Martina; Wieland, Konrad; Kappel, Gerti

    2013-01-01

    As every software artifact, also software models are subject to continuous evolution. The operations applied between two successive versions of a model are crucial for understanding its evolution. Generic approaches for detecting operations a posteriori identify atomic operations, but neglect composite operations, such as refactorings, which leads to cluttered difference reports. To tackle this limitation, we present an orthogonal extension of existing atomic operation detection approaches for detecting also composite operations. Our approach searches for occurrences of composite operations within a set of detected atomic operations in a post-processing manner. One major benefit is the reuse of specifications available for executing composite operations also for detecting applications of them. We evaluate the accuracy of the approach in a real-world case study and investigate the scalability of our implementation in an experiment. PMID:23471366

  12. Towards modeling hydrodynamic stress limitations on transpiration

    NASA Astrophysics Data System (ADS)

    Matheny, A. M.; Bohrer, G.; Ivanov, V. Y.; Stoy, P. C.

    2011-12-01

    Evapotranspiration is one of the major forcing functions of Earth's climate, providing the link for the soil-plant-water continuum. Current models for transpiration assume a coupling between stomatal conductance and soil moisture through empirical relationships that do not resolve the hydrodynamic process of water movement from the soil to the leaves. This approach does not take advantage of recent advances in our understanding of water flow and storage in the trees, or of tree and canopy structure. It has been suggested that stomata respond to water potential in the leaf and branch, and that this hydrodynamic response is a mechanism for hydraulic limitation of stomatal conductance. Hydraulic limitations in forest ecosystems are common and are known to control transpiration when the soil is drying or when vapor pressure deficit (VPD) is very large. Hydraulic limitation can also impact stomatal apertures under conditions of adequate soil moisture and lower evaporative demand. Hydrodynamic stresses at the tree level act at several time scales, including the fast, minute-hour scale. These dynamics are faster than the time scales of hours to days at which drying soil will affect stomata conductance. The lack of representation of the tree-hydrodynamic process should therefore lead to atypical intra-daily patterns of error in results of current models. We use a large-scale comparison between observations and land-surface models to characterize the patterns of intra-daily error in simulated water flux. Through the use of the North American Carbon Program (NACP) dataset, more than 10 years of water flux data for 35 Fluxnet sites in the US and Canada have been analyzed. The diurnal error for each of the 24 models represented in this dataset allows the models to be categorized and evaluated on their ability to accurately predict the fast temporal dynamics of transpiration in different ecosystems and atmospheric forcing. Among well calibrated models, two general error

  13. Central limit theorems for percolation models

    NASA Astrophysics Data System (ADS)

    Cox, J. Theodore; Grimmett, Geoffrey

    1981-06-01

    Let p ≠ 1/2 be the open-bond probability in Broadbent and Hammersley's percolation model on the square lattice. Let W x be the cluster of sites connected to x by open paths, and let γ(n) be any sequence of circuits with interiors|γ limits^ circ (n)| to infty . It is shown that for certain sequences of functions { f n },S_n = sum _{x in γ limits^ circ (n)} f_n (W_x ) converges in distribution to the standard normal law when properly normalized. This result answers a problem posed by Kunz and Souillard, proving that the number S n of sites inside γ(n) which are connected by open paths to γ(n) is approximately normal for large circuits γ(n).

  14. [The "pneumoneck" in videocervicoscopy: operative technique and anatomic limits].

    PubMed

    Cougard, P; Cheynel, N; Peschaud, F; Bilosi, M; Goudet, P

    2002-04-01

    The aim of this study was to describe a technic in order to create a gas space "pneumoneck" during videoendoscopic surgery of the neck and to determine the anatomical limits of this space. Data were based on a surgical experience and on the dissection of two corpses. This space was located between the two layers of the pre-tracheal lamina of the cervical fascia. This space was enclosed and favourable to detachment with insufflated gas without subcutaneous emphysema. This approach can be used for parathyroid and thyroid surgery.

  15. 40 CFR 63.6600 - What emission limitations and operating limitations must I meet if I own or operate a stationary...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... operating limitations must I meet if I own or operate a stationary RICE with a site rating of more than 500... RICE with a site rating of more than 500 brake HP located at a major source of HAP emissions... 4SRB stationary RICE with a site rating of more than 500 brake HP located at a major source of...

  16. 40 CFR 63.6600 - What emission limitations and operating limitations must I meet if I own or operate a stationary...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... operating limitations must I meet if I own or operate a stationary RICE with a site rating of more than 500... RICE with a site rating of more than 500 brake HP located at a major source of HAP emissions... 4SRB stationary RICE with a site rating of more than 500 brake HP located at a major source of...

  17. 40 CFR 63.6600 - What emission limitations and operating limitations must I meet if I own or operate a stationary...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... operating limitations must I meet if I own or operate a stationary RICE with a site rating of more than 500... RICE with a site rating of more than 500 brake HP located at a major source of HAP emissions... 4SRB stationary RICE with a site rating of more than 500 brake HP located at a major source of...

  18. 40 CFR 63.6600 - What emission limitations and operating limitations must I meet if I own or operate a stationary...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... operating limitations must I meet if I own or operate a stationary RICE with a site rating of more than 500... RICE with a site rating of more than 500 brake HP located at a major source of HAP emissions... 4SRB stationary RICE with a site rating of more than 500 brake HP located at a major source of...

  19. Streaming Limit: New Observations and Model Results

    NASA Astrophysics Data System (ADS)

    Ng, C. K.; Reames, D. V.; Tylka, A. J.

    2010-12-01

    Solar energetic particle intensities at 1 AU often show an early temporal plateau where the intensity is limited. This early intensity limit may provide a valuable time window for astronauts to seek shelter before large shock-associated intensity increase (if any). The Ng and Reames (1994) time-dependent model of SEP transport through self-amplified Alfvén waves predicts a maximum proton intensity of ~ 250 particles /(cm^2 s str MeV) at ~ 1 MeV, in agreement within a factor of 2 with the observational survey by Reames and Ng (1998). In fact, streaming-limited intensity is implicit in the steady-state shock-acceleration solution of Bell (1978) and Lee (1983). Further studies on the effect of self-amplified waves on SEP intensity spectra have been made by Ng, Reames and Tylka (2003), Vanio (2003), and Lee (2005). Intensities exceeding the Ng and Reames (1994) limit have been reported (e.g., Lario et al. 2009). We present new observations of multi-species SEP spectra at the temporal intensity plateau. We also present new theoretical results on how the streaming limit depends on ion species and energy, ambient wave intensity spectrum, Alfvén speed, solar-wind speed, shock speed, and the presence of interplanetary shocks and interaction regions. Among the new interesting observations is the strong suppression of ion intensities near 1 MeV/amu in events that have high 10-100 MeV proton intensity. New modeling results confirm that this is due to these low-energy ions being strongly scattered at small pitch angles by waves amplified by 10-100 MeV protons at large pitch angles. As the high-energy protons travel upstream and scatter from small to large pitch-angles, they simultaneously amplify waves en route over a range of wavenumbers, including those that are resonant with low-energy protons. Thus, wave amplification by streaming protons and the pitch-angle dependence of the wave-particle resonance condition are essential factors in understanding the limiting behavior

  20. Working with capacity limitations: operations management in critical care

    PubMed Central

    2011-01-01

    As your hospital's ICU director, you are approached by the hospital's administration to help solve ongoing problems with ICU bed availability. The ICU seems to be constantly full, and trauma patients in the emergency department sometimes wait up to 24 hours before receiving a bed. Additionally, the cardiac surgeons were forced to cancel several elective coronary-artery bypass graft cases because there was not a bed available for postoperative recovery. The hospital administrators ask whether you can decrease your ICU length of stay, and wonder whether they should expand the ICU to include more beds For help in understanding and optimizing your ICU's throughput, you seek out the operations management researchers at your university. PMID:21892976

  1. 78 FR 75289 - Airworthiness Directives; BAE Systems (Operations) Limited Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-11

    ... was prompted by reports of cracking of the main fitting of the nose landing gear (NLG). This proposed...'s Nose Landing Gear (NLG) Main Fitting cracking have been reported. Subsequently in different cases... models, all serial numbers. (d) Subject Air Transport Association (ATA) of America Code 32, Landing...

  2. 75 FR 71613 - Mandatory Reliability Standards for Interconnection Reliability Operating Limits

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-24

    ... Energy Regulatory Commission 18 CFR Part 40 Mandatory Reliability Standards for Interconnection Reliability Operating Limits November 18, 2010. AGENCY: Federal Energy Regulatory Commission. ACTION: Notice... Regulatory Commission proposes to approve three new Interconnection Reliability Operations and...

  3. 40 CFR 60.5170 - What operating limits and requirements must I meet and by when?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... limit for minimum operating temperature of the combustion chamber (or afterburner combustion chamber... leak detection system such that the alarm does not sound more than 5 percent of the operating...

  4. 40 CFR 60.5170 - What operating limits and requirements must I meet and by when?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... limit for minimum operating temperature of the combustion chamber (or afterburner combustion chamber... leak detection system such that the alarm does not sound more than 5 percent of the operating...

  5. 40 CFR 60.5170 - What operating limits and requirements must I meet and by when?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... limit for minimum operating temperature of the combustion chamber (or afterburner combustion chamber... leak detection system such that the alarm does not sound more than 5 percent of the operating...

  6. 40 CFR 60.5170 - What operating limits and requirements must I meet and by when?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... limit for minimum operating temperature of the combustion chamber (or afterburner combustion chamber... leak detection system such that the alarm does not sound more than 5 percent of the operating...

  7. 14 CFR 91.317 - Provisionally certificated civil aircraft: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Provisionally certificated civil aircraft: Operating limitations. 91.317 Section 91.317 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES GENERAL OPERATING AND FLIGHT RULES Special Flight Operations §...

  8. Magnetic Separations with Magnetite: Theory, Operation, and Limitations

    SciTech Connect

    G. B. Cotten

    2000-08-01

    This dissertation documents the theory development and experimental plan followed to describe how a magnetite-based column under the influence of an external magnetic field functions as a magnetic separator. Theoretical simulations predict that weekly paramagnetic particles in the sub-micron range can be magnetically separated while diamagnetic particles as large as 2 microns in diameter may pass. Magnetite-based columns were evaluated as magnetically-controllable enhanced filtration devices. There was no evidence of enhanced filtration for diamagnetic particles by the magnetite-based bed. Magnetite-based magnetic separators have proven to be effective in specific laboratory experiments, indicating a potential feasibility for scale-up operations. Column media-filter type filtration effects indicate a magnetite-based column would not be suitable for treatment of a waste stream with a high diamagnetic solids content or high volume throughput requirements. Specific applications requiring removal of sub-micron para- or ferromagnetic particles under batch or Stokes flow conditions would be most applicable.

  9. The Skyrme Model in the BPS Limit

    NASA Astrophysics Data System (ADS)

    Adam, C.; Naya, C.; Sánchez-Guillén, J.; Vazquez, R.; Wereszczyński, A.

    In this review, we summarize the main features of the BPS Skyrme model which provides a physically well-motivated idealization of atomic nuclei and nuclear matter: (1) it leads to zero binding energies for classical solitons (while realistic binding energies emerge owing to the semiclassical corrections, the Coulomb interaction and isospin breaking); (2) it describes a perfect non-barotropic fluid already at the microscopic (field theoretical) level which allows to study thermodynamics beyond the mean-field limit. These properties allow for an approximate but analytical calculation of binding energies of the most abundant nuclei, for a determination of the equation of state of skyrmionic matter (both in the full field theory and in a mean-field approximation) as well as the description of neutron stars as Skyrme solitons with a very good agreement with available observational data. All these results suggest that the proper low energy effective model of QCD should be close to the BPS Skyrme model in a certain sense (a "near-BPS Skyrme model"), with a prominent role played by the BPS part.

  10. A Secure Operational Model for Mobile Payments

    PubMed Central

    2014-01-01

    Instead of paying by cash, check, or credit cards, customers can now also use their mobile devices to pay for a wide range of services and both digital and physical goods. However, customers' security concerns are a major barrier to the broad adoption and use of mobile payments. In this paper we present the design of a secure operational model for mobile payments in which access control is based on a service-oriented architecture. A customer uses his/her mobile device to get authorization from a remote server and generate a two-dimensional barcode as the payment certificate. This payment certificate has a time limit and can be used once only. The system also provides the ability to remotely lock and disable the mobile payment service. PMID:25386607

  11. A secure operational model for mobile payments.

    PubMed

    Chang, Tao-Ku

    2014-01-01

    Instead of paying by cash, check, or credit cards, customers can now also use their mobile devices to pay for a wide range of services and both digital and physical goods. However, customers' security concerns are a major barrier to the broad adoption and use of mobile payments. In this paper we present the design of a secure operational model for mobile payments in which access control is based on a service-oriented architecture. A customer uses his/her mobile device to get authorization from a remote server and generate a two-dimensional barcode as the payment certificate. This payment certificate has a time limit and can be used once only. The system also provides the ability to remotely lock and disable the mobile payment service.

  12. Operational Models of Infrastructure Resilience

    DTIC Science & Technology

    2015-01-01

    following a catastrophic event.” Reed et al.(67) present resilience scoring met- rics and build on the work of Haimes(58) in using input-output...ties among countermeasures. Military Operations Research, 2002; 7:5–23. 31. Garrick B, Hall J, McDonald JC, OToole T, Probst PS, Parker E, Rosenthal R

  13. CHAIN-LIMITING OPERATION OF FISCHER-TROPSCH REACTOR

    SciTech Connect

    Apostolos A. Nikolopoulos; Santosh K. Gangwal

    2003-06-01

    The use of pulsing in Fischer-Tropsch (FT) synthesis to limit the hydrocarbon chain growth and maximize the yield of diesel-range (C{sub 10}-C{sub 20}) products was examined on high-chain-growth-probability ({alpha} {ge} 0.9) FT catalysts. Pulsing experiments were conducted using a stainless-steel fixed-bed micro-reactor, equipped with both on-line (for the permanent gases and light hydrocarbons, C{sub 1}-C{sub 15}) and off-line (for the heavier hydrocarbons, C{sub 10}-C{sub 65}) gas chromatography analysis. Additional experiments were performed using a highly active attrition-resistant iron-based FT synthesis catalyst in a 1-liter continuous stirred-tank rector (CSTR). On both a Co-ZrO{sub 2}/SiO{sub 2} and a Co/Al{sub 2}O{sub 3} FT synthesis catalyst application of H{sub 2} pulsing causes significant increase in CO conversion, and only an instantaneous increase in undesirable selectivity to CH{sub 4}. Increasing the frequency of H{sub 2} pulsing enhances the selectivity to C{sub 10}-C{sub 20} compounds but the chain-growth probability {alpha} remains essentially unaffected. Increasing the duration of H{sub 2} pulsing results in enhancing the maximum obtained CO conversion and an instantaneous selectivity to CH{sub 4}. An optimum set of H{sub 2} pulse parameters (pulse frequency, pulse duration) is required for maximizing the yield of desirable diesel-range C{sub 10}-C{sub 20} products. Application of a suitable H{sub 2} pulse in the presence of added steam in the feed is a simple method to overcome the loss in activity and the shift in paraffin vs. olefin selectivity (increase in the olefin/paraffin ratio) caused by the excess steam. A decrease in syngas concentration has a strong suppressing effect on the olefin/paraffin ratio of the light hydrocarbon products. Higher syngas concentration can increase the chain growth probability {alpha} and thus allow for better evaluation of the effect of pulsing on FT synthesis. On a high-{alpha} Fe/K/Cu/SiO{sub 2} FT

  14. REACTIVE CONTROL AND ITS OPERATION LIMITS IN RESPONDING TO A NOVEL SLIP IN GAIT

    PubMed Central

    Yang, Feng; Pai, Yi-Chung

    2012-01-01

    The purposes of this study were: 1) to examine the reactive control of the resultant joint moments at the lower limbs in response to a novel and unannounced slip; 2) to establish individualized forward-dynamics models; and 3) to explore personal potential by determining the operation limits of these moments at each lower limb joint, beyond which the resulting motion at this or other joints will exceed its/their normal range. Ten young subjects’ kinematics and kinetics, collected during regular walking and during their first exposure to an unannounced slip, were randomly selected from an existing database. An inverse-dynamics approach was applied to derive their (original) resultant joint moments, which were then used as input to establish forward-dynamics models, each including an individualized 16-element foot model to simulate ground reaction force. A simulated annealing (SA) algorithm was applied to modify the original moments, so that the subsequent output (baseline) moments can closely reproduce these subjects’ recorded motion. The results revealed that the subjects reactively increased their hip extensor and knee flexor moments and reduced their ankle plantar-flexor moments of their single-stance limb following slip onset. The SA was able to successfully customize each individual’s forward dynamics model. The analysis of the operation limits revealed that these individuals may be able to further increase their knee flexors more so than increase the hip extensors or reduce ankle plantar flexors before causing abnormal joint movement. Such systematic approach opens the possibility to properly assess an individual’s rehabilitation potential, and to identify whether this person’s strength is the limiting factor for stability training. PMID:20526677

  15. 40 CFR 60.4870 - How do I establish my operating limits?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... dioxide, you are not required to establish an operating limit and monitor, scrubber liquid flow rate or... an operating limit and monitor pressure drop across the scrubber or scrubber liquid flow rate if you... the collection plates, or effluent water flow rate at the outlet of the electrostatic precipitator...

  16. 40 CFR 63.7323 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... CATEGORIES (CONTINUED) National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing... establish operating limits? (a) For a venturi scrubber applied to pushing emissions from a coke oven battery... pushing emissions from a coke oven battery, you must establish site-specific operating limits for...

  17. 14 CFR 135.211 - VFR: Over-the-top carrying passengers: Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false VFR: Over-the-top carrying passengers...-top carrying passengers: Operating limitations. Subject to any additional limitations in § 135.181, no person may operate an aircraft under VFR over-the-top carrying passengers, unless— (a) Weather reports...

  18. 14 CFR 135.211 - VFR: Over-the-top carrying passengers: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false VFR: Over-the-top carrying passengers...-top carrying passengers: Operating limitations. Subject to any additional limitations in § 135.181, no person may operate an aircraft under VFR over-the-top carrying passengers, unless— (a) Weather reports...

  19. 14 CFR 91.143 - Flight limitation in the proximity of space flight operations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Flight limitation in the proximity of space flight operations. 91.143 Section 91.143 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Flight Rules General § 91.143 Flight limitation in the proximity of space flight operations....

  20. 14 CFR 91.143 - Flight limitation in the proximity of space flight operations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Flight limitation in the proximity of space flight operations. 91.143 Section 91.143 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Flight Rules General § 91.143 Flight limitation in the proximity of space flight operations....

  1. 14 CFR 91.143 - Flight limitation in the proximity of space flight operations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Flight limitation in the proximity of space flight operations. 91.143 Section 91.143 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Flight Rules General § 91.143 Flight limitation in the proximity of space flight operations....

  2. 14 CFR 91.143 - Flight limitation in the proximity of space flight operations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Flight limitation in the proximity of space flight operations. 91.143 Section 91.143 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Flight Rules General § 91.143 Flight limitation in the proximity of space flight operations....

  3. 14 CFR 91.143 - Flight limitation in the proximity of space flight operations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Flight limitation in the proximity of space flight operations. 91.143 Section 91.143 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Flight Rules General § 91.143 Flight limitation in the proximity of space flight operations....

  4. 40 CFR 63.7733 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National Emission Standards for Hazardous Air Pollutants for Iron and Steel... operating limits. (b) For each wet scrubber subject to the operating limits in § 63.7690(b)(2) for...

  5. 40 CFR Table 4 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 14 2014-07-01 2014-07-01 false Operating Limits for Boilers and...: Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 4 Table 4 to Subpart DDDDD of Part 63—Operating Limits for Boilers and Process Heaters As stated in §...

  6. 40 CFR Table 4 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 14 2013-07-01 2013-07-01 false Operating Limits for Boilers and...: Industrial, Commercial, and Institutional Boilers and Process Heaters Pt. 63, Subpt. DDDDD, Table 4 Table 4 to Subpart DDDDD of Part 63—Operating Limits for Boilers and Process Heaters As stated in §...

  7. 40 CFR 63.3321 - What operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Standards for Hazardous Air Pollutants: Paper and Other Web Coating Emission Standards and Compliance Dates § 63.3321 What operating limits must I meet? (a) For any web coating line or group of web coating lines... systems and control devices, and you must establish the operating limits during the performance...

  8. 76 FR 18616 - Operating Limitations at New York LaGuardia Airport

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-04

    ... Federal Aviation Administration Operating Limitations at New York LaGuardia Airport AGENCY: Federal... Order Limiting Operations at New York LaGuardia Airport (LGA) that published on December 27, 2006, and... until the final Congestion Management Rule for LaGuardia Airport, John F. Kennedy International...

  9. 40 CFR Table 2 to Subpart Eeee of... - Operating Limits for Incinerators and Wet Scrubbers

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 6 2010-07-01 2010-07-01 false Operating Limits for Incinerators and Wet Scrubbers 2 Table 2 to Subpart EEEE of Part 60 Protection of Environment ENVIRONMENTAL PROTECTION..., Subpt. EEEE, Table 2 Table 2 to Subpart EEEE of Part 60—Operating Limits for Incinerators and...

  10. 40 CFR Table 2 to Subpart Eeee of... - Operating Limits for Incinerators and Wet Scrubbers

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 7 2013-07-01 2013-07-01 false Operating Limits for Incinerators and Wet Scrubbers 2 Table 2 to Subpart EEEE of Part 60 Protection of Environment ENVIRONMENTAL PROTECTION..., Subpt. EEEE, Table 2 Table 2 to Subpart EEEE of Part 60—Operating Limits for Incinerators and...

  11. 40 CFR Table 2 to Subpart Eeee of... - Operating Limits for Incinerators and Wet Scrubbers

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 7 2014-07-01 2014-07-01 false Operating Limits for Incinerators and Wet Scrubbers 2 Table 2 to Subpart EEEE of Part 60 Protection of Environment ENVIRONMENTAL PROTECTION..., Subpt. EEEE, Table 2 Table 2 to Subpart EEEE of Part 60—Operating Limits for Incinerators and...

  12. 40 CFR 63.7733 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... drop and scrubber water flow rate, you must establish site-specific operating limits according to the...), measure and record the pressure drop and scrubber water flow rate in intervals of no more than 15 minutes... establish a site-specific operating limit for scrubbing liquid flow rate according to the...

  13. 76 FR 18620 - Operating Limitations at John F. Kennedy International Airport

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-04

    ... Federal Aviation Administration Operating Limitations at John F. Kennedy International Airport AGENCY... amends the Order Limiting Operations at John F. Kennedy International Airport (JFK) that published on... until the final Congestion Management Rule for LaGuardia Airport, John F. Kennedy International...

  14. 40 CFR 63.5555 - How do I demonstrate continuous compliance with the emission limits, operating limits, and work...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... startup, shutdown, and malfunction. These instances are deviations from the emission limits, operating... period of startup, shutdown, or malfunction are not violations if you demonstrate to the Administrator's... deviations that occur during a period you identify as a startup, shutdown, or malfunction are...

  15. 40 CFR Table 6 to Subpart Zzzz of... - Continuous Compliance With Emission Limitations, Operating Limitations, Work Practices, and...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... major source of HAP a. Reduce CO emissions and using an oxidation catalyst, and using a CPMS i... achieved; a andii. Collecting the catalyst inlet temperature data according to § 63.6625(b); and iii... operating limitations for the catalyst inlet temperature; and v. Measuring the pressure drop across...

  16. 40 CFR Table 6 to Subpart Zzzz of... - Continuous Compliance With Emission Limitations, Operating Limitations, Work Practices, and...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... major source of HAP a. Reduce CO emissions and using an oxidation catalyst, and using a CPMS i... achieved; a andii. Collecting the catalyst inlet temperature data according to § 63.6625(b); and iii... operating limitations for the catalyst inlet temperature; and v. Measuring the pressure drop across...

  17. 30 CFR 761.11 - Areas where surface coal mining operations are prohibited or limited.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 3 2012-07-01 2012-07-01 false Areas where surface coal mining operations are....11 Areas where surface coal mining operations are prohibited or limited. You may not conduct surface coal mining operations on the following lands unless you either have valid existing rights,...

  18. 30 CFR 761.11 - Areas where surface coal mining operations are prohibited or limited.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 3 2011-07-01 2011-07-01 false Areas where surface coal mining operations are....11 Areas where surface coal mining operations are prohibited or limited. You may not conduct surface coal mining operations on the following lands unless you either have valid existing rights,...

  19. 25 CFR 47.7 - What are the expenditure limitations for Bureau-operated schools?

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... schools? 47.7 Section 47.7 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR EDUCATION UNIFORM DIRECT FUNDING AND SUPPORT FOR BUREAU-OPERATED SCHOOLS § 47.7 What are the expenditure limitations for Bureau-operated schools? Each Bureau-operated school must spend all allotted funds in accordance...

  20. 25 CFR 47.7 - What are the expenditure limitations for Bureau-operated schools?

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... schools? 47.7 Section 47.7 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR EDUCATION UNIFORM DIRECT FUNDING AND SUPPORT FOR BUREAU-OPERATED SCHOOLS § 47.7 What are the expenditure limitations for Bureau-operated schools? Each Bureau-operated school must spend all allotted funds in accordance...

  1. 25 CFR 47.7 - What are the expenditure limitations for Bureau-operated schools?

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... schools? 47.7 Section 47.7 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR EDUCATION UNIFORM DIRECT FUNDING AND SUPPORT FOR BUREAU-OPERATED SCHOOLS § 47.7 What are the expenditure limitations for Bureau-operated schools? Each Bureau-operated school must spend all allotted funds in accordance...

  2. 25 CFR 47.7 - What are the expenditure limitations for Bureau-operated schools?

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... schools? 47.7 Section 47.7 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR EDUCATION UNIFORM DIRECT FUNDING AND SUPPORT FOR BUREAU-OPERATED SCHOOLS § 47.7 What are the expenditure limitations for Bureau-operated schools? Each Bureau-operated school must spend all allotted funds in accordance...

  3. 25 CFR 47.7 - What are the expenditure limitations for Bureau-operated schools?

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... schools? 47.7 Section 47.7 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR EDUCATION UNIFORM DIRECT FUNDING AND SUPPORT FOR BUREAU-OPERATED SCHOOLS § 47.7 What are the expenditure limitations for Bureau-operated schools? Each Bureau-operated school must spend all allotted funds in accordance...

  4. 14 CFR 121.555 - Compliance with approved routes and limitations: Domestic and flag operations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Compliance with approved routes and... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE... Operations § 121.555 Compliance with approved routes and limitations: Domestic and flag operations. No...

  5. 30 CFR 761.11 - Areas where surface coal mining operations are prohibited or limited.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 3 2014-07-01 2014-07-01 false Areas where surface coal mining operations are....11 Areas where surface coal mining operations are prohibited or limited. You may not conduct surface coal mining operations on the following lands unless you either have valid existing rights,...

  6. 30 CFR 761.11 - Areas where surface coal mining operations are prohibited or limited.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 3 2013-07-01 2013-07-01 false Areas where surface coal mining operations are....11 Areas where surface coal mining operations are prohibited or limited. You may not conduct surface coal mining operations on the following lands unless you either have valid existing rights,...

  7. 40 CFR 60.4870 - How do I establish my operating limits?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... compliance with the emission limit for particulate matter, cadmium, and lead. (4) For an activated carbon... compliance with the emission limit for mercury. (5) For an activated carbon injection system designed to... cadmium emission limits. (h) For activated carbon injection, establish the site-specific operating...

  8. 40 CFR 60.4870 - How do I establish my operating limits?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... compliance with the emission limit for particulate matter, cadmium, and lead. (4) For an activated carbon... compliance with the emission limit for mercury. (5) For an activated carbon injection system designed to... cadmium emission limits. (h) For activated carbon injection, establish the site-specific operating...

  9. 40 CFR 60.4870 - How do I establish my operating limits?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... compliance with the emission limit for particulate matter, cadmium, and lead. (4) For an activated carbon... compliance with the emission limit for mercury. (5) For an activated carbon injection system designed to... cadmium emission limits. (h) For activated carbon injection, establish the site-specific operating...

  10. The design and implementation of an operational model evaluation system

    SciTech Connect

    Foster, K.T.

    1995-06-01

    An evaluation of an atmospheric transport and diffusion model`s operational performance typically involves the comparison of the model`s calculations with measurements of an atmospheric pollutant`s temporal and spatial distribution. These evaluations however often use data from a small number of experiments and may be limited to producing some of the commonly quoted statistics based on the differences between model calculations and the measurements. This paper presents efforts to develop a model evaluation system geared for both the objective statistical analysis and the more subjective visualization of the inter-relationships between a model`s calculations and the appropriate field measurement data.

  11. Human Operator Control Strategy Model.

    DTIC Science & Technology

    1980-04-01

    control learning control strategy N computer simulation of motor behavior ABSTRACT (Continue on reverese ide If necesery end Identify by block numbe...Frank Vogler has been a continuing resource during testing and analysis phases. Cooperative Plan students Kirk Hoyer , Bob Baltar, and Bob Hummel have...Introduction ....... .................... .. 79 1. Question 1: Do HOPE models match human behavior to an acceptable extent? .... ............ ... 80

  12. 40 CFR 63.6600 - What emission limitations and operating limitations must I meet if I own or operate a stationary...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... limitations must I meet if I own or operate a stationary RICE with a site rating of more than 500 brake HP... RICE with a site rating of more than 500 brake HP located at a major source of HAP emissions... 4SRB stationary RICE with a site rating of more than 500 brake HP located at a major source of...

  13. Operational monitoring and forecasting in the Aegean Sea: system limitations and forecasting skill evaluation.

    PubMed

    Nittis, K; Zervakis, V; Perivoliotis, L; Papadopoulos, A; Chronis, G

    2001-01-01

    The POSEIDON system, based on a network of 11 oceanographic buoys and a system of atmospheric/oceanic models, provides real-time observations and forecasts of the marine environmental conditions in the Aegean Sea. The buoy network collects meteorological, sea state and upper-ocean physical and biochemical data. The efficiency and functionality of the various system components are being evaluated during the present pre-operational phase and discussed in this paper. The problem of bio-fouling on optical and chemical sensors is found to be a main limitation factor on the quality of data. Possible solutions to this problem as well as quality control methods that are being developed are also described. Finally, an evaluation of the numerical models is presented through the estimation of their forecasting skill for selected periods.

  14. A synthesis of transplant experiments and ecological niche models suggests that range limits are often niche limits.

    PubMed

    Lee-Yaw, Julie A; Kharouba, Heather M; Bontrager, Megan; Mahony, Colin; Csergő, Anna Mária; Noreen, Annika M E; Li, Qin; Schuster, Richard; Angert, Amy L

    2016-06-01

    Global change has made it important to understand the factors that shape species' distributions. Central to this area of research is the question of whether species' range limits primarily reflect the distribution of suitable habitat (i.e. niche limits) or arise as a result of dispersal limitation. Over-the-edge transplant experiments and ecological niche models are commonly used to address this question, yet few studies have taken advantage of a combined approach for inferring the causes of range limits. Here, we synthesise results from existing transplant experiments with new information on the predicted suitability of sites based on niche models. We found that individual performance and habitat suitability independently decline beyond range limits across multiple species. Furthermore, inferences from transplant experiments and niche models were generally concordant within species, with 31 out of 40 cases fully supporting the hypothesis that range limits are niche limits. These results suggest that range limits are often niche limits and that the factors constraining species' ranges operate at scales detectable by both transplant experiments and niche models. In light of these findings, we outline an integrative framework for addressing the causes of range limits in individual species.

  15. Assessing the impact of modeling limits on intelligent systems

    NASA Technical Reports Server (NTRS)

    Rouse, William B.; Hammer, John M.

    1990-01-01

    The knowledge bases underlying intelligent systems are validated. A general conceptual framework is provided for considering the roles in intelligent systems of models of physical, behavioral, and operational phenomena. A methodology is described for identifying limits in particular intelligent systems, and the use of the methodology is illustrated via an experimental evaluation of the pilot-vehicle interface within the Pilot's Associate. The requirements and functionality are outlined for a computer based knowledge engineering environment which would embody the approach advocated and illustrated in earlier discussions. Issues considered include the specific benefits of this functionality, the potential breadth of applicability, and technical feasibility.

  16. Understanding USSOCOM and US Marine Corps Roles in Crisis Response and Limited Contingency Operations

    DTIC Science & Technology

    2013-04-15

    place. All of the major SOF and/or Marine Corps units that could be identified in the literature search as participating in the operation are listed...Special Forces, Rangers, Special Operations Aviation, Military Information Support Operations units (referred to here as it is in historical literature ...In order to mitigate sample bias, an effort was made to use all the crisis response and limited contingency operations from the literature . However

  17. Postdeployment driving stress and related occupational limitations among veterans of Operation Iraqi Freedom and Operation Enduring Freedom.

    PubMed

    Hwang, Eric J; Peyton, Claudia G; Kim, David K; Nakama-Sato, Kristine K; Noble, Amy E

    2014-01-01

    Difficulty in driving after deployment has emerged as an impediment for servicemembers returning from Operation Iraqi Freedom and Operation Enduring Freedom (OIF-OEF). This study explored postdeployment driving stress and related occupational limitations using two self-report instruments: the Driver's Stress Profile and the Driving and Occupational Limitations questionnaire. Data gathered from 103 OIF-OEF returnees confirmed that driving and related occupational issues occur postdeployment. Significant low to moderate correlations were found between postdeployment driving stress and limitations in community mobility, leisure, and social participation. The returnees who drove off base more frequently during deployment showed significantly higher levels of postdeployment driving stress than the returnees who drove off base less frequently. Moreover, the returnees who demonstrated higher levels of driving stress and occupational limitations required more time to resume normal driving postdeployment. Findings raise awareness about the need to design effective driver rehabilitation and community reintegration programs for this population.

  18. Modelling Human Performance in Maritime Interdiction Operations

    DTIC Science & Technology

    2010-10-01

    high-tempo operations generate heat and therefore clothing needs to reflect the thermoregulatory demands . Currently operators often under-dress for the...influencing the insertion and on-target phases need to be quantified. The initial strategy of evaluation should include, a formal Task Analysis , to assess...initially via formal Task Analysis , so as to assess the potential degradation to performance and operational effectiveness. The ability to model these

  19. Structure constant of twist-2 light-ray operators in the Regge limit

    SciTech Connect

    Balitsky, Ian; Kazakov, Vladimir; Sobko, Evgeny

    2016-03-11

    We compute the correlation function of three twist-2 operators in N = 4 SYM in the leading BFKL approximation at any Nc. In this limit, the result is applicable to other gauge theories, including QCD.

  20. Structure constant of twist-2 light-ray operators in the Regge limit

    DOE PAGES

    Balitsky, Ian; Kazakov, Vladimir; Sobko, Evgeny

    2016-03-11

    We compute the correlation function of three twist-2 operators in N = 4 SYM in the leading BFKL approximation at any Nc. In this limit, the result is applicable to other gauge theories, including QCD.

  1. 40 CFR 63.3321 - What operating limits must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Standards for Hazardous Air Pollutants: Paper and Other Web Coating Emission Standards and Compliance Dates § 63.3321 What operating limits must I meet? (a) For any web coating line or group of web coating...

  2. 14 CFR 331.11 - What are the limits on reimbursement to operators or providers?

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... OPERATORS AND SERVICE PROVIDERS IN THE WASHINGTON, DC AREA General Provisions § 331.11 What are the limits..., DC area. The Department will provide a release form to applicants that must be completed before...

  3. 40 CFR Table 3 to Subpart Eeee of... - Operating Limits-High Throughput Transfer Racks

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Distribution (Non-Gasoline) Pt. 63, Subpt. EEEE, Table 3 Table 3 to Subpart EEEE of Part 63—Operating Limits... each new affected source using . . . You must . . . 1. A thermal oxidizer to comply with an...

  4. Background Error Correlation Modeling with Diffusion Operators

    DTIC Science & Technology

    2013-01-01

    a general procedure for constructing a BEC model as a rational function of the diffusion operator D is presented and analytic expressions for the...Under the assumption of local homogeneity of D , a heuristic method for computing the diagonal elements of B is proposed. It is shown that the...In this chap- ter, a general procedure for constructing a BEC model as a rational function of the diffusion operator D is presented and analytic

  5. Parametric identification of human operator models

    NASA Technical Reports Server (NTRS)

    Ninz, N. R.

    1982-01-01

    The accurate and efficient identification of the human operator is still a need in human factors engineering especially concerning multivariable control. Control theoretic identification methods need to be tested with human operator models under realistic boundary conditons. The requirements and criteria for the use of parametric methods, selected models as well as the Maximum Likelihood Method and the Extended Kalman Filter are displayed. The experiments and results are comparatively discussed from the point of practical engineering.

  6. Modeling of Transient Heat Pipe Operation

    NASA Technical Reports Server (NTRS)

    Colwell, G. T.; Hartley, J. G.

    1984-01-01

    The major goal of this project is to develop mathematical models of heat pipes which can be used to predict transient behavior under normal and adverse conditions. The models and solution techniques are to be formulated so that they can be incorporated into existing NASA structural design codes. The major parameters of interest are heat flux distribution, temperature distribution, working fluid pressure distribution, fluid and containment thermal and mechanical properties and geometry. Normal transient operation is taken to be operating conditions where the capillary structure remains fully wetted. Adverse transient operation occurs when drying, re-wetting, choking, non-continuum flow, thawing, freezing, etc., occur in the internal heat pipe working fluid.

  7. 40 CFR 63.7323 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... SOURCE CATEGORIES (CONTINUED) National Emission Standards for Hazardous Air Pollutants for Coke Ovens... use to establish operating limits? (a) For a venturi scrubber applied to pushing emissions from a coke... applied to pushing emissions from a coke oven battery, you must establish site-specific operating...

  8. 40 CFR 63.7323 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... SOURCE CATEGORIES (CONTINUED) National Emission Standards for Hazardous Air Pollutants for Coke Ovens... use to establish operating limits? (a) For a venturi scrubber applied to pushing emissions from a coke... applied to pushing emissions from a coke oven battery, you must establish site-specific operating...

  9. 40 CFR 63.7323 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... SOURCE CATEGORIES (CONTINUED) National Emission Standards for Hazardous Air Pollutants for Coke Ovens... use to establish operating limits? (a) For a venturi scrubber applied to pushing emissions from a coke... applied to pushing emissions from a coke oven battery, you must establish site-specific operating...

  10. 14 CFR 135.211 - VFR: Over-the-top carrying passengers: Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... ON BOARD SUCH AIRCRAFT VFR/IFR Operating Limitations and Weather Requirements § 135.211 VFR: Over-the... person may operate an aircraft under VFR over-the-top carrying passengers, unless— (a) Weather reports or forecasts, or any combination of them, indicate that the weather at the intended point of termination...

  11. 14 CFR 135.211 - VFR: Over-the-top carrying passengers: Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... ON BOARD SUCH AIRCRAFT VFR/IFR Operating Limitations and Weather Requirements § 135.211 VFR: Over-the... person may operate an aircraft under VFR over-the-top carrying passengers, unless— (a) Weather reports or forecasts, or any combination of them, indicate that the weather at the intended point of termination...

  12. 14 CFR 135.211 - VFR: Over-the-top carrying passengers: Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... ON BOARD SUCH AIRCRAFT VFR/IFR Operating Limitations and Weather Requirements § 135.211 VFR: Over-the... person may operate an aircraft under VFR over-the-top carrying passengers, unless— (a) Weather reports or forecasts, or any combination of them, indicate that the weather at the intended point of termination...

  13. 14 CFR 91.319 - Aircraft having experimental certificates: Operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Aircraft having experimental certificates: Operating limitations. 91.319 Section 91.319 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Special Flight Operations § 91.319 Aircraft having experimental certificates:...

  14. 14 CFR 91.319 - Aircraft having experimental certificates: Operating limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Aircraft having experimental certificates: Operating limitations. 91.319 Section 91.319 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Special Flight Operations § 91.319 Aircraft having experimental certificates:...

  15. 14 CFR 91.319 - Aircraft having experimental certificates: Operating limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Aircraft having experimental certificates: Operating limitations. 91.319 Section 91.319 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Special Flight Operations § 91.319 Aircraft having experimental certificates:...

  16. 14 CFR 91.319 - Aircraft having experimental certificates: Operating limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Aircraft having experimental certificates: Operating limitations. 91.319 Section 91.319 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Special Flight Operations § 91.319 Aircraft having experimental certificates:...

  17. 14 CFR 91.319 - Aircraft having experimental certificates: Operating limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Aircraft having experimental certificates: Operating limitations. 91.319 Section 91.319 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Special Flight Operations § 91.319 Aircraft having experimental certificates:...

  18. 40 CFR Table 2 of Subpart Aaaaaaa... - Emission Limits for Asphalt Roofing Manufacturing (Coating) Operations

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Manufacturing (Coating) Operations 2 Table 2 of Subpart AAAAAAA of Part 63 Protection of Environment... Pollutants for Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and... AAAAAAA of Part 63—Emission Limits for Asphalt Roofing Manufacturing (Coating) Operations For * * *...

  19. 40 CFR Table 2 of Subpart Aaaaaaa... - Emission Limits for Asphalt Roofing Manufacturing (Coating) Operations

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Manufacturing (Coating) Operations 2 Table 2 of Subpart AAAAAAA of Part 63 Protection of Environment... Pollutants for Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and... AAAAAAA of Part 63—Emission Limits for Asphalt Roofing Manufacturing (Coating) Operations For * * *...

  20. 40 CFR Table 2 of Subpart Aaaaaaa... - Emission Limits for Asphalt Roofing Manufacturing (Coating) Operations

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Manufacturing (Coating) Operations 2 Table 2 of Subpart AAAAAAA of Part 63 Protection of Environment... Pollutants for Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and... AAAAAAA of Part 63—Emission Limits for Asphalt Roofing Manufacturing (Coating) Operations For * * *...

  1. 42 CFR 447.206 - Cost limit for providers operated by units of government.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... section applies to payments made to health care providers that are operated by units of government as...) of the Act. (a) General rules. (1) All health care providers that are operated by units of government are limited to reimbursement not in excess of the individual health care provider's cost of...

  2. 40 CFR Table 1 of Subpart Aaaaaaa... - Emission Limits for Asphalt Processing (Refining) Operations

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 15 2012-07-01 2012-07-01 false Emission Limits for Asphalt Processing... Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and Information... of Part 63—Emission Limits for Asphalt Processing (Refining) Operations For * * * You must meet...

  3. 40 CFR Table 1 of Subpart Aaaaaaa... - Emission Limits for Asphalt Processing (Refining) Operations

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 14 2011-07-01 2011-07-01 false Emission Limits for Asphalt Processing... Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and Information... of Part 63—Emission Limits for Asphalt Processing (Refining) Operations For * * * You must meet...

  4. 40 CFR Table 1 of Subpart Aaaaaaa... - Emission Limits for Asphalt Processing (Refining) Operations

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 15 2014-07-01 2014-07-01 false Emission Limits for Asphalt Processing... Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and Information... of Part 63—Emission Limits for Asphalt Processing (Refining) Operations For * * * You must meet...

  5. 40 CFR Table 1 of Subpart Aaaaaaa... - Emission Limits for Asphalt Processing (Refining) Operations

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 14 2010-07-01 2010-07-01 false Emission Limits for Asphalt Processing... Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and Information... of Part 63—Emission Limits for Asphalt Processing (Refining) Operations For * * * You must meet...

  6. 40 CFR Table 1 of Subpart Aaaaaaa... - Emission Limits for Asphalt Processing (Refining) Operations

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 15 2013-07-01 2013-07-01 false Emission Limits for Asphalt Processing... Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing Other Requirements and Information... of Part 63—Emission Limits for Asphalt Processing (Refining) Operations For * * * You must meet...

  7. 40 CFR 62.14635 - What operating limits must I meet and by when?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... demonstrating compliance with all applicable emission limitations. (2) Minimum pressure drop across the wet scrubber, which is calculated as 90 percent of the average pressure drop across the wet scrubber measured... earlier). (c) If you use a fabric filter to comply with the emission limitations, you must operate...

  8. 14 CFR 135.399 - Small nontransport category airplane performance operating limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... that person complies with the takeoff weight limitations in the approved Airplane Flight Manual or equivalent for operations under this part, and, if the airplane is certificated under § 135.169(b) (4) or (5) with the landing weight limitations in the Approved Airplane Flight Manual or equivalent for...

  9. 14 CFR 121.513 - Flight time limitations: Overseas and international operations: airplanes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Flight time limitations: Overseas and international operations: airplanes. 121.513 Section 121.513 Aeronautics and Space FEDERAL AVIATION...: airplanes. In place of the flight time limitations in §§ 121.503 through 121.511, a certificate...

  10. 14 CFR 121.513 - Flight time limitations: Overseas and international operations: airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Flight time limitations: Overseas and international operations: airplanes. 121.513 Section 121.513 Aeronautics and Space FEDERAL AVIATION...: airplanes. In place of the flight time limitations in §§ 121.503 through 121.511, a certificate...

  11. Limited Production (LP) Precision Runway Monitor (PRM) Operational Test and Evaluation integration and OT and E Operational Test Plan

    NASA Astrophysics Data System (ADS)

    Livings, Jeffrey

    1995-05-01

    This document defines the Test Plan and corresponding Test Verification Requirements Traceability Matrix (TVRTM) that will be used to conduct the Limited Production (LP) Precision Runway Monitor (PRM) Operational Test and Evaluation (OT and E) Integration and OT and E Operational tests. These tests will be conducted at the Minneapolis-St. Paul International Airport following the Contractor Site Acceptance Test. The LP PRM OT and E test effort will concentrate on Operational Effectiveness and Suitability. The Operational Effectiveness Test consists of a review of the contractor performed Development Test and Evaluation (DT and E) and Site Acceptance Tests. This review will evaluate whether each of the Measures of Effectiveness had been satisfactorily tested and whether the results meet the Minimum Acceptable Operational REquirements MAORs). This review will be conducted solely by test engineers and does not require the PRM system. The Operational Suitability Tests will expose the test participants (Air Traffic (AT) Controllers and Airway Facilities (AF) Technicians) to the PRM system in an operational environment while they perform specified operational procedures. These tests will be conducted in two separate phases: AT Suitability and AF Suitability. Each of these phases is focused on the specific test participants.

  12. The Launch Systems Operations Cost Model

    NASA Technical Reports Server (NTRS)

    Prince, Frank A.; Hamaker, Joseph W. (Technical Monitor)

    2001-01-01

    One of NASA's primary missions is to reduce the cost of access to space while simultaneously increasing safety. A key component, and one of the least understood, is the recurring operations and support cost for reusable launch systems. In order to predict these costs, NASA, under the leadership of the Independent Program Assessment Office (IPAO), has commissioned the development of a Launch Systems Operations Cost Model (LSOCM). LSOCM is a tool to predict the operations & support (O&S) cost of new and modified reusable (and partially reusable) launch systems. The requirements are to predict the non-recurring cost for the ground infrastructure and the recurring cost of maintaining that infrastructure, performing vehicle logistics, and performing the O&S actions to return the vehicle to flight. In addition, the model must estimate the time required to cycle the vehicle through all of the ground processing activities. The current version of LSOCM is an amalgamation of existing tools, leveraging our understanding of shuttle operations cost with a means of predicting how the maintenance burden will change as the vehicle becomes more aircraft like. The use of the Conceptual Operations Manpower Estimating Tool/Operations Cost Model (COMET/OCM) provides a solid point of departure based on shuttle and expendable launch vehicle (ELV) experience. The incorporation of the Reliability and Maintainability Analysis Tool (RMAT) as expressed by a set of response surface model equations gives a method for estimating how changing launch system characteristics affects cost and cycle time as compared to today's shuttle system. Plans are being made to improve the model. The development team will be spending the next few months devising a structured methodology that will enable verified and validated algorithms to give accurate cost estimates. To assist in this endeavor the LSOCM team is part of an Agency wide effort to combine resources with other cost and operations professionals to

  13. The associate principal astronomer telescope operations model

    NASA Technical Reports Server (NTRS)

    Drummond, Mark; Bresina, John; Swanson, Keith; Edgington, Will; Henry, Greg

    1994-01-01

    This paper outlines a new telescope operations model that is intended to achieve low operating costs with high operating efficiency and high scientific productivity. The model is based on the existing Principal Astronomer approach used in conjunction with ATIS, a language for commanding remotely located automatic telescopes. This paper introduces the notion of an Associate Principal Astronomer, or APA. At the heart of the APA is automatic observation loading and scheduling software, and it is this software that is expected to help achieve efficient and productive telescope operations. The purpose of the APA system is to make it possible for astronomers to submit observation requests to and obtain resulting data from remote automatic telescopes, via the Internet, in a highly-automated way that minimizes human interaction with the system and maximizes the scientific return from observing time.

  14. Inert doublet model and LEP II limits

    SciTech Connect

    Lundstroem, Erik; Gustafsson, Michael; Edsjoe, Joakim

    2009-02-01

    The inert doublet model is a minimal extension of the standard model introducing an additional SU(2) doublet with new scalar particles that could be produced at accelerators. While there exists no LEP II analysis dedicated for these inert scalars, the absence of a signal within searches for supersymmetric neutralinos can be used to constrain the inert doublet model. This translation however requires some care because of the different properties of the inert scalars and the neutralinos. We investigate what restrictions an existing DELPHI Collaboration study of neutralino pair production can put on the inert scalars and discuss the result in connection with dark matter. We find that although an important part of the inert doublet model parameter space can be excluded by the LEP II data, the lightest inert particle still constitutes a valid dark matter candidate.

  15. Modeling Operations Costs for Human Exploration Architectures

    NASA Technical Reports Server (NTRS)

    Shishko, Robert

    2013-01-01

    Operations and support (O&S) costs for human spaceflight have not received the same attention in the cost estimating community as have development costs. This is unfortunate as O&S costs typically comprise a majority of life-cycle costs (LCC) in such programs as the International Space Station (ISS) and the now-cancelled Constellation Program. Recognizing this, the Constellation Program and NASA HQs supported the development of an O&S cost model specifically for human spaceflight. This model, known as the Exploration Architectures Operations Cost Model (ExAOCM), provided the operations cost estimates for a variety of alternative human missions to the moon, Mars, and Near-Earth Objects (NEOs) in architectural studies. ExAOCM is philosophically based on the DoD Architecture Framework (DoDAF) concepts of operational nodes, systems, operational functions, and milestones. This paper presents some of the historical background surrounding the development of the model, and discusses the underlying structure, its unusual user interface, and lastly, previous examples of its use in the aforementioned architectural studies.

  16. Modeling of transient heat pipe operation

    NASA Technical Reports Server (NTRS)

    Colwell, Gene T.

    1989-01-01

    Mathematical models and an associated computer program for heat pipe startup from the frozen state have been developed. Finite element formulations of the governing equations are written for each heat pipe region for each operating condition during startup from the frozen state. The various models were checked against analytical and experimental data available in the literature for three specific types of operation. Computations using the methods developed were made for a space shuttle reentry mission where a heat pipe cooled leading edge was used on the wing.

  17. Transferability of tubifex limiting factor models

    USGS Publications Warehouse

    Terrell, James W.; Milhous, Robert T.

    2004-01-01

    Dense populations of T. tubifex are generally associated with habitats dominated by fine sediments and enriched organic material (e.g. Krueger, 2002). Management of whirling disease positive systems is entering a new phase where channel modifications are being implemented to reduce or isolate this type of habitat. These management actions have the potential to cause new areas of sediment deposition. Descriptions of sediment characteristics associated with high numbers of T. tubifex can help engineers design channel modifications that minimize situations where altered velocity distributions inadvertently create optimum worm habitat. Ongoing studies in two Colorado Rivers with very different flow regimes and watershed characteristics provide preliminary evidence that a median sediment particle diameter greater than 1.4mm in conjunction with at least 30% (dry weight) of sediment with a diameter less than 0.3mm limits T. tubifex densities to approximately less than 10% of maximum densities.

  18. Nearshore Operational Model for Rip Current Predictions

    NASA Astrophysics Data System (ADS)

    Sembiring, L. E.; Van Dongeren, A. R.; Van Ormondt, M.; Winter, G.; Roelvink, J.

    2012-12-01

    A coastal operational model system can serve as a tool in order to monitor and predict coastal hazards, and to acquire up-to-date information on coastal state indicators. The objective of this research is to develop a nearshore operational model system for the Dutch coast focusing on swimmer safety. For that purpose, an operational model system has been built which can predict conditions up to 48 hours ahead. The model system consists of three different nested model domain covering The North Sea, The Dutch coastline, and one local model which is the area of interest. Three different process-based models are used to simulate physical processes within the system: SWAN to simulate wave propagation, Delft3D-Flow for hydraulics flow simulation, and XBeach for the nearshore models. The SWAN model is forced by wind fields from operational HiRLAM, as well as two dimensional wave spectral data from WaveWatch 3 Global as the ocean boundaries. The Delft3D Flow model is forced by assigning the boundaries with tidal constants for several important astronomical components as well as HiRLAM wind fields. For the local XBeach model, up-to-date bathymetry will be obtained by assimilating model computation and Argus video data observation. A hindcast is carried out on the Continental Shelf Model, covering the North Sea and nearby Atlantic Ocean, for the year 2009. Model skills are represented by several statistical measures such as rms error and bias. In general the results show that the model system exhibits a good agreement with field data. For SWAN results, integral significant wave heights are predicted well by the model for all wave buoys considered, with rms errors ranging from 0.16 m for the month of May with observed mean significant wave height of 1.08 m, up to rms error of 0.39 m for the month of November, with observed mean significant wave height of 1.91 m. However, it is found that the wave model slightly underestimates the observation for the period of June, especially

  19. Model Based Autonomy for Robust Mars Operations

    NASA Technical Reports Server (NTRS)

    Kurien, James A.; Nayak, P. Pandurang; Williams, Brian C.; Lau, Sonie (Technical Monitor)

    1998-01-01

    Space missions have historically relied upon a large ground staff, numbering in the hundreds for complex missions, to maintain routine operations. When an anomaly occurs, this small army of engineers attempts to identify and work around the problem. A piloted Mars mission, with its multiyear duration, cost pressures, half-hour communication delays and two-week blackouts cannot be closely controlled by a battalion of engineers on Earth. Flight crew involvement in routine system operations must also be minimized to maximize science return. It also may be unrealistic to require the crew have the expertise in each mission subsystem needed to diagnose a system failure and effect a timely repair, as engineers did for Apollo 13. Enter model-based autonomy, which allows complex systems to autonomously maintain operation despite failures or anomalous conditions, contributing to safe, robust, and minimally supervised operation of spacecraft, life support, In Situ Resource Utilization (ISRU) and power systems. Autonomous reasoning is central to the approach. A reasoning algorithm uses a logical or mathematical model of a system to infer how to operate the system, diagnose failures and generate appropriate behavior to repair or reconfigure the system in response. The 'plug and play' nature of the models enables low cost development of autonomy for multiple platforms. Declarative, reusable models capture relevant aspects of the behavior of simple devices (e.g. valves or thrusters). Reasoning algorithms combine device models to create a model of the system-wide interactions and behavior of a complex, unique artifact such as a spacecraft. Rather than requiring engineers to all possible interactions and failures at design time or perform analysis during the mission, the reasoning engine generates the appropriate response to the current situation, taking into account its system-wide knowledge, the current state, and even sensor failures or unexpected behavior.

  20. The Cognitive Operations Specified in the Model.

    ERIC Educational Resources Information Center

    Ghatala, Elizabeth S.

    The Wisconsin model of conceptual learning and development specifies four levels of mastery in the acquisition of a concept. The levels of mastery are defined in terms of performance on tasks designed to measure each level. This paper discusses the internal operations or processes which are inferred as the mechanisms by which each level of…

  1. Business intelligence modeling in launch operations

    NASA Astrophysics Data System (ADS)

    Bardina, Jorge E.; Thirumalainambi, Rajkumar; Davis, Rodney D.

    2005-05-01

    The future of business intelligence in space exploration will focus on the intelligent system-of-systems real-time enterprise. In present business intelligence, a number of technologies that are most relevant to space exploration are experiencing the greatest change. Emerging patterns of set of processes rather than organizational units leading to end-to-end automation is becoming a major objective of enterprise information technology. The cost element is a leading factor of future exploration systems. This technology project is to advance an integrated Planning and Management Simulation Model for evaluation of risks, costs, and reliability of launch systems from Earth to Orbit for Space Exploration. The approach builds on research done in the NASA ARC/KSC developed Virtual Test Bed (VTB) to integrate architectural, operations process, and mission simulations for the purpose of evaluating enterprise level strategies to reduce cost, improve systems operability, and reduce mission risks. The objectives are to understand the interdependency of architecture and process on recurring launch cost of operations, provide management a tool for assessing systems safety and dependability versus cost, and leverage lessons learned and empirical models from Shuttle and International Space Station to validate models applied to Exploration. The systems-of-systems concept is built to balance the conflicting objectives of safety, reliability, and process strategy in order to achieve long term sustainability. A planning and analysis test bed is needed for evaluation of enterprise level options and strategies for transit and launch systems as well as surface and orbital systems. This environment can also support agency simulation based acquisition process objectives. The technology development approach is based on the collaborative effort set forth in the VTB's integrating operations, process models, systems and environment models, and cost models as a comprehensive disciplined

  2. Business Intelligence Modeling in Launch Operations

    NASA Technical Reports Server (NTRS)

    Bardina, Jorge E.; Thirumalainambi, Rajkumar; Davis, Rodney D.

    2005-01-01

    This technology project is to advance an integrated Planning and Management Simulation Model for evaluation of risks, costs, and reliability of launch systems from Earth to Orbit for Space Exploration. The approach builds on research done in the NASA ARC/KSC developed Virtual Test Bed (VTB) to integrate architectural, operations process, and mission simulations for the purpose of evaluating enterprise level strategies to reduce cost, improve systems operability, and reduce mission risks. The objectives are to understand the interdependency of architecture and process on recurring launch cost of operations, provide management a tool for assessing systems safety and dependability versus cost, and leverage lessons learned and empirical models from Shuttle and International Space Station to validate models applied to Exploration. The systems-of-systems concept is built to balance the conflicting objectives of safety, reliability, and process strategy in order to achieve long term sustainability. A planning and analysis test bed is needed for evaluation of enterprise level options and strategies for transit and launch systems as well as surface and orbital systems. This environment can also support agency simulation .based acquisition process objectives. The technology development approach is based on the collaborative effort set forth in the VTB's integrating operations. process models, systems and environment models, and cost models as a comprehensive disciplined enterprise analysis environment. Significant emphasis is being placed on adapting root cause from existing Shuttle operations to exploration. Technical challenges include cost model validation, integration of parametric models with discrete event process and systems simulations. and large-scale simulation integration. The enterprise architecture is required for coherent integration of systems models. It will also require a plan for evolution over the life of the program. The proposed technology will produce

  3. Possible nutrient limiting factor in long term operation of closed aquatic ecosystem

    NASA Astrophysics Data System (ADS)

    Hao, Zongjie; Li, Yanhui; Cai, Wenkai; Wu, Peipei; Liu, Yongding; Wang, Gaohong

    2012-03-01

    To investigate nutrient limitation effect on the community metabolism of closed aquatic ecosystem and possible nutrient limiting factors in the experimental food chains, depletion of inorganic chemicals including carbon, nitrogen and phosphorous was tested. A closed aquatic ecosystem lab module consisting of Chlorella pyrenoidosa and Chlamydomonas reinhardtii, Daphnia magna and associated unidentified microbes was established. Closed ecological systems receive no carbon dioxide; therefore, we presumed carbon as a first limiting factor. The results showed that the algae population in the nutrient saturated group was statistically higher than that in the nutrient limited groups, and that the chlorophyll a content of algae in the phosphorus limited group was the highest among the limited groups. However, the nitrogen limited group supported the most Daphnia, followed by the carbon limited group, the nutrient saturated group and the phosphorus limited group. Redundancy analysis showed that the total phosphorus contents were correlated significantly with the population of algae, and that the amount of soluble carbohydrate as feedback of nutrient depletion was correlated with the number of Daphnia. Thus, these findings suggest that phosphorus is the limiting factor in the operation of closed aquatic ecosystem. The results presented herein have important indications for the future construction of long term closed ecological system.

  4. Predictive modelling for EAST divertor operation

    NASA Astrophysics Data System (ADS)

    Chen, YiPing

    2011-06-01

    The predictive modelling study of the divertor operation in EAST tokamak [B. Wan et al., Nucl. Fusion 49, 104011 (2009)] with double null (DN) configuration is carried out by using the two-dimensional edge plasma code B2.5-SOLPS5.0 [D. P. Coster, X. Bonnin et al., J. Nucl. Mater. 337-339, 366 (2005)]. The modelling study includes the particle and power balance in the scrape-off-layer (SOL), the operation parameters of plasma density, temperature and plasma heat fluxes at the separatrix, the target plates and the wall, and the effect of the gas puffing, drifts, and vertical target plate on the divertor operation. The fluid model for the edge plasma is applied using the real magnetohydrodynamic (MHD) equilibrium from the MHD equilibrium code EFIT [L. L. Lao et al., Nucl. Fusion 25, 1611 (1985)] and the real divertor geometry in the device. Before EAST tokamak starts its experimental programme of divertor operation, the modelling plays an important role in the design of its experimental programme and the optimization of the divertor operation parameters. Based on the modelling results, EAST divertor can operate over a large wide of plasma parameters with different regimes. For a heating power of 8 MW and an edge density at core-SOL interface Nedge = 0.8 × 10191/m3 and Nedge = 1.3 × 10191/m3, the EAST divertor begins access to the high recycling operation regime at the outer and inner target plates, respectively, where the plasma temperature and the heat fluxes at the target plates decrease. The gas puffing can increase the plasma density at the separatrix and trigger the transition from the high recycling operation into detachment at the target plates. When E × B and B × ▿B drifts are taken into account, the asymmetry of plasma parameters and heat fluxes between up-down SOLs can be found. The vertical target plate in EAST divertor can reduce the peak values of heat fluxes at the target plate and enables detachment at lower plasma density. The divertor with the

  5. Predictive modelling for EAST divertor operation

    SciTech Connect

    Chen Yiping

    2011-06-15

    The predictive modelling study of the divertor operation in EAST tokamak [B. Wan et al., Nucl. Fusion 49, 104011 (2009)] with double null (DN) configuration is carried out by using the two-dimensional edge plasma code B2.5-SOLPS5.0 [D. P. Coster, X. Bonnin et al., J. Nucl. Mater. 337-339, 366 (2005)]. The modelling study includes the particle and power balance in the scrape-off-layer (SOL), the operation parameters of plasma density, temperature and plasma heat fluxes at the separatrix, the target plates and the wall, and the effect of the gas puffing, drifts, and vertical target plate on the divertor operation. The fluid model for the edge plasma is applied using the real magnetohydrodynamic (MHD) equilibrium from the MHD equilibrium code EFIT [L. L. Lao et al., Nucl. Fusion 25, 1611 (1985)] and the real divertor geometry in the device. Before EAST tokamak starts its experimental programme of divertor operation, the modelling plays an important role in the design of its experimental programme and the optimization of the divertor operation parameters. Based on the modelling results, EAST divertor can operate over a large wide of plasma parameters with different regimes. For a heating power of 8 MW and an edge density at core-SOL interface N{sub edge} = 0.8 x 10{sup 19}1/m{sup 3} and N{sub edge} = 1.3 x 10{sup 19}1/m{sup 3}, the EAST divertor begins access to the high recycling operation regime at the outer and inner target plates, respectively, where the plasma temperature and the heat fluxes at the target plates decrease. The gas puffing can increase the plasma density at the separatrix and trigger the transition from the high recycling operation into detachment at the target plates. When E x B and B x {nabla}B drifts are taken into account, the asymmetry of plasma parameters and heat fluxes between up-down SOLs can be found. The vertical target plate in EAST divertor can reduce the peak values of heat fluxes at the target plate and enables detachment at lower

  6. High energy bursts from a solid state laser operated in the heat capacity limited regime

    DOEpatents

    Albrecht, Georg; George, E. Victor; Krupke, William F.; Sooy, Walter; Sutton, Steven B.

    1996-01-01

    High energy bursts are produced from a solid state laser operated in a heat capacity limited regime. Instead of cooling the laser, the active medium is thermally well isolated. As a result, the active medium will heat up until it reaches some maximum acceptable temperature. The waste heat is stored in the active medium itself. Therefore, the amount of energy the laser can put out during operation is proportional to its mass, the heat capacity of the active medium, and the temperature difference over which it is being operated. The high energy burst capacity of a heat capacity operated solid state laser, together with the absence of a heavy, power consuming steady state cooling system for the active medium, will make a variety of applications possible. Alternately, cooling takes place during a separate sequence when the laser is not operating. Industrial applications include new material working processes.

  7. High energy bursts from a solid state laser operated in the heat capacity limited regime

    DOEpatents

    Albrecht, G.; George, E.V.; Krupke, W.F.; Sooy, W.; Sutton, S.B.

    1996-06-11

    High energy bursts are produced from a solid state laser operated in a heat capacity limited regime. Instead of cooling the laser, the active medium is thermally well isolated. As a result, the active medium will heat up until it reaches some maximum acceptable temperature. The waste heat is stored in the active medium itself. Therefore, the amount of energy the laser can put out during operation is proportional to its mass, the heat capacity of the active medium, and the temperature difference over which it is being operated. The high energy burst capacity of a heat capacity operated solid state laser, together with the absence of a heavy, power consuming steady state cooling system for the active medium, will make a variety of applications possible. Alternately, cooling takes place during a separate sequence when the laser is not operating. Industrial applications include new material working processes. 5 figs.

  8. Application of Energy Processor Model for Diagnostic Symptom Limit Value Determination in Steam Turbines

    NASA Astrophysics Data System (ADS)

    Galka, Tomasz

    1999-09-01

    With growing importance of quantitative technical condition assessment in critical machinery, the need for adequate determination of diagnostic symptom limit values is becoming vital. Such determination may be based on the energy processor model of a machine [1]. The general model should, for each specific case, be developed in order to account for unique features of machine design and operation. The paper describes such an approach for large steam turbines, operated by utility power stations. The energy processor model, adopted for these machines, is described and its mathematical description is presented, based on resonable simplifying assumptions. Possibilities of the determination of model parameters from data obtained during normal operation are outlined and discussed.

  9. Physical constraints, fundamental limits, and optimal locus of operating points for an inverted pendulum based actuated dynamic walker.

    PubMed

    Patnaik, Lalit; Umanand, Loganathan

    2015-10-26

    The inverted pendulum is a popular model for describing bipedal dynamic walking. The operating point of the walker can be specified by the combination of initial mid-stance velocity (v0) and step angle (φm) chosen for a given walk. In this paper, using basic mechanics, a framework of physical constraints that limit the choice of operating points is proposed. The constraint lines thus obtained delimit the allowable region of operation of the walker in the v0-φm plane. A given average forward velocity vx,avg can be achieved by several combinations of v0 and φm. Only one of these combinations results in the minimum mechanical power consumption and can be considered the optimum operating point for the given vx,avg. This paper proposes a method for obtaining this optimal operating point based on tangency of the power and velocity contours. Putting together all such operating points for various vx,avg, a family of optimum operating points, called the optimal locus, is obtained. For the energy loss and internal energy models chosen, the optimal locus obtained has a largely constant step angle with increasing speed but tapers off at non-dimensional speeds close to unity.

  10. Modeling of transient heat pipe operation

    NASA Technical Reports Server (NTRS)

    Colwell, G. T.; Hartley, J. G.

    1986-01-01

    Mathematical models and associated solution procedures which can be used to design heat pipe cooled structures for use on hypersonic vehicles are being developed. The models should also have the capability to predict off-design performance for a variety of operating conditions. It is expected that the resulting models can be used to predict startup behavior of liquid metal heat pipes to be used in reentry vehicles, hypersonic aircraft, and space nuclear reactors. Work to date related to numerical solutions of governing differential equations for the outer shell and the combination capillary structure and working fluid is summarized. Finite element numerical equations using both implicit, explicit, and combination methods were examined.

  11. 40 CFR Table 7 to Subpart Ddddd of... - Establishing Operating Limits

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...-specific minimum pressure drop and minimum flow rate operating limit according to § 63.7530(c) (1) Data from the pressure drop and liquid flow rate monitors and the particulate matter, mercury, or total selected metals performance test (a) You must collect pressure drop and liquid flow-rate data every...

  12. 40 CFR 60.4850 - What operating limits and requirements must I meet and by when?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for New Sewage Sludge Incineration Units Emission Limits, Emission Standards, and... establish in § 60.4870 for each operating parameter associated with each air pollution control device....

  13. 77 FR 39387 - Loan Policies and Operations; Lending and Leasing Limits and Risk Management; Effective Date

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-03

    ... From the Federal Register Online via the Government Publishing Office FARM CREDIT ADMINISTRATION 12 CFR Part 614 RIN 3052-AC60 Loan Policies and Operations; Lending and Leasing Limits and Risk Management; Effective Date AGENCY: Farm Credit Administration. ACTION: Notice of effective date. SUMMARY:...

  14. 40 CFR 63.3321 - What operating limits must I meet?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating Emission Standards and Compliance Dates § 63.3321 What operating limits must I meet? (a) For any web coating line or group of web coating lines for which you use add-on control devices, unless you use a solvent...

  15. 40 CFR 63.3321 - What operating limits must I meet?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating Emission Standards and Compliance Dates § 63.3321 What operating limits must I meet? (a) For any web coating line or group of web coating lines for which you use add-on control devices, unless you use a solvent...

  16. 40 CFR 63.3321 - What operating limits must I meet?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating Emission Standards and Compliance Dates § 63.3321 What operating limits must I meet? (a) For any web coating line or group of web coating lines for which you use add-on control devices, unless you use a solvent...

  17. 30 CFR 761.11 - Areas where surface coal mining operations are prohibited or limited.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Areas where surface coal mining operations are prohibited or limited. 761.11 Section 761.11 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR AREAS UNSUITABLE FOR MINING AREAS DESIGNATED BY ACT OF CONGRESS §...

  18. 40 CFR Table 5 to Subpart Yyyy of... - Continuous Compliance With Operating Limitations

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... oxidation catalyst continuously monitoring the inlet temperature to the catalyst and maintaining the 4-hour rolling average of the inlet temperature within the range suggested by the catalyst manufacturer. 2. without the use of an oxidation catalyst continuously monitoring the operating limitations that have...

  19. 40 CFR Table 5 to Subpart Yyyy of... - Continuous Compliance With Operating Limitations

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... oxidation catalyst continuously monitoring the inlet temperature to the catalyst and maintaining the 4-hour rolling average of the inlet temperature within the range suggested by the catalyst manufacturer. 2. without the use of an oxidation catalyst continuously monitoring the operating limitations that have...

  20. 40 CFR 62.14635 - What operating limits must I meet and by when?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... POLLUTANTS Federal Plan Requirements for Commercial and Industrial Solid Waste Incineration Units That... earlier). (c) If you use a fabric filter to comply with the emission limitations, you must operate each fabric filter system such that the bag leak detection system alarm does not sound more than 5 percent...

  1. 40 CFR 62.14635 - What operating limits must I meet and by when?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... POLLUTANTS Federal Plan Requirements for Commercial and Industrial Solid Waste Incineration Units That... earlier). (c) If you use a fabric filter to comply with the emission limitations, you must operate each fabric filter system such that the bag leak detection system alarm does not sound more than 5 percent...

  2. 40 CFR 62.14635 - What operating limits must I meet and by when?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... POLLUTANTS Federal Plan Requirements for Commercial and Industrial Solid Waste Incineration Units That... earlier). (c) If you use a fabric filter to comply with the emission limitations, you must operate each fabric filter system such that the bag leak detection system alarm does not sound more than 5 percent...

  3. 40 CFR Table 2 to Subpart III of... - Operating Limits for Wet Scrubbers

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND... operating limits And monitor using these minimum frequencies Data measurement Data recording Averaging time... pressure drop or amperage Continuous Every 15 minutes 3-hour rolling a Scrubber liquor flow rate...

  4. 40 CFR Table 2 to Subpart III of... - Operating Limits for Wet Scrubbers

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND... operating limits And monitor using these minimum frequencies Data measurement Data recording Averaging time... pressure drop or amperage Continuous Every 15 minutes 3-hour rolling a Scrubber liquor flow rate...

  5. 40 CFR Table 2 to Subpart Eeee of... - Operating Limits for Incinerators and Wet Scrubbers

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards... establish these operating limits And monitoring using these minimum frequencies Data measurement Data.... Scrubber liquor flow rate Minimum flow rate Continuous Every 15 minutes 3-hour rolling a. 4....

  6. 40 CFR Table 2 to Subpart Eeee of... - Operating Limits for Incinerators and Wet Scrubbers

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards... establish these operating limits And monitoring using these minimum frequencies Data measurement Data.... Scrubber liquor flow rate Minimum flow rate Continuous Every 15 minutes 3-hour rolling a. 4....

  7. 40 CFR Table 7 to Subpart Ddddd of... - Establishing Operating Limits

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...-specific minimum pressure drop and minimum flow rate operating limit according to § 63.7530(c) (1) Data from the pressure drop and liquid flow rate monitors and the particulate matter, mercury, or total selected metals performance test (a) You must collect pressure drop and liquid flow-rate data every...

  8. 40 CFR Table 5 to Subpart Aaaaa of... - Continuous Compliance With Operating Limits

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 14 2014-07-01 2014-07-01 false Continuous Compliance With Operating Limits 5 Table 5 to Subpart AAAAA of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  9. 40 CFR Table 5 to Subpart Lllll of... - Continuous Compliance With Operating Limits a

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 14 2014-07-01 2014-07-01 false Continuous Compliance With Operating Limits a 5 Table 5 to Subpart LLLLL of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  10. 40 CFR Table 5 to Subpart Lllll of... - Continuous Compliance With Operating Limits a

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 14 2012-07-01 2011-07-01 true Continuous Compliance With Operating Limits a 5 Table 5 to Subpart LLLLL of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  11. 40 CFR Table 5 to Subpart Lllll of... - Continuous Compliance With Operating Limits a

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 14 2013-07-01 2013-07-01 false Continuous Compliance With Operating Limits a 5 Table 5 to Subpart LLLLL of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  12. 40 CFR Table 5 to Subpart Aaaaa of... - Continuous Compliance With Operating Limits

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 13 2011-07-01 2011-07-01 false Continuous Compliance With Operating Limits 5 Table 5 to Subpart AAAAA of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  13. 40 CFR Table 5 to Subpart Lllll of... - Continuous Compliance With Operating Limits a

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 13 2011-07-01 2011-07-01 false Continuous Compliance With Operating Limits a 5 Table 5 to Subpart LLLLL of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  14. 40 CFR Table 5 to Subpart Aaaaa of... - Continuous Compliance With Operating Limits

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 14 2013-07-01 2013-07-01 false Continuous Compliance With Operating Limits 5 Table 5 to Subpart AAAAA of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  15. 40 CFR Table 5 to Subpart Aaaaa of... - Continuous Compliance With Operating Limits

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 14 2012-07-01 2011-07-01 true Continuous Compliance With Operating Limits 5 Table 5 to Subpart AAAAA of Part 63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED) National...

  16. 40 CFR 63.7323 - What procedures must I use to establish operating limits?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 14 2013-07-01 2013-07-01 false What procedures must I use to...: Pushing, Quenching, and Battery Stacks Initial Compliance Requirements § 63.7323 What procedures must I use to establish operating limits? (a) For a venturi scrubber applied to pushing emissions from a...

  17. The national operational environment model (NOEM)

    NASA Astrophysics Data System (ADS)

    Salerno, John J.; Romano, Brian; Geiler, Warren

    2011-06-01

    The National Operational Environment Model (NOEM) is a strategic analysis/assessment tool that provides insight into the complex state space (as a system) that is today's modern operational environment. The NOEM supports baseline forecasts by generating plausible futures based on the current state. It supports what-if analysis by forecasting ramifications of potential "Blue" actions on the environment. The NOEM also supports sensitivity analysis by identifying possible pressure (leverage) points in support of the Commander that resolves forecasted instabilities, and by ranking sensitivities in a list for each leverage point and response. The NOEM can be used to assist Decision Makers, Analysts and Researchers with understanding the inter-workings of a region or nation state, the consequences of implementing specific policies, and the ability to plug in new operational environment theories/models as they mature. The NOEM is built upon an open-source, license-free set of capabilities, and aims to provide support for pluggable modules that make up a given model. The NOEM currently has an extensive number of modules (e.g. economic, security & social well-being pieces such as critical infrastructure) completed along with a number of tools to exercise them. The focus this year is on modeling the social and behavioral aspects of a populace within their environment, primarily the formation of various interest groups, their beliefs, their requirements, their grievances, their affinities, and the likelihood of a wide range of their actions, depending on their perceived level of security and happiness. As such, several research efforts are currently underway to model human behavior from a group perspective, in the pursuit of eventual integration and balance of populace needs/demands within their respective operational environment and the capacity to meet those demands. In this paper we will provide an overview of the NOEM, the need for and a description of its main components

  18. Supersymmetric models with higher dimensional operators

    NASA Astrophysics Data System (ADS)

    Antoniadis, I.; Dudas, E.; Ghilencea, D. M.

    2008-03-01

    In 4D renormalisable theories, integrating out massive states generates in the low energy effective action higher dimensional operators (derivative or otherwise). Using a superfield language it is shown that a 4D N=1 supersymmetric theory with higher derivative operators in either the Kahler or the superpotential part of the Lagrangian and with an otherwise arbitrary superpotential, is equivalent to a 4D N=1 theory of second order (i.e. without higher derivatives) with additional superfields and renormalised interactions. We provide examples where a free theory with trivial supersymmetry breaking provided by a linear superpotential becomes, in the presence of higher derivatives terms and in the second order version, a non-trivial interactive one with spontaneous supersymmetry breaking. The couplings of the equivalent theory acquire a threshold correction through their dependence on the scale of the higher dimensional operator(s). The scalar potential in the second order theory is not necessarily positive definite, and one can in principle have a vanishing potential with broken supersymmetry. We provide an application to MSSM and argue that at tree-level and for a mass scale associated to a higher derivative term in the TeV range, the Higgs mass can be lifted above the current experimental limits.

  19. On the Scaling Limits of Determinantal Point Processes with Kernels Induced by Sturm-Liouville Operators

    NASA Astrophysics Data System (ADS)

    Bornemann, Folkmar

    2016-08-01

    By applying an idea of Borodin and Olshanski [J. Algebra 313 (2007), 40-60], we study various scaling limits of determinantal point processes with trace class projection kernels given by spectral projections of selfadjoint Sturm-Liouville operators. Instead of studying the convergence of the kernels as functions, the method directly addresses the strong convergence of the induced integral operators. We show that, for this notion of convergence, the Dyson, Airy, and Bessel kernels are universal in the bulk, soft-edge, and hard-edge scaling limits. This result allows us to give a short and unified derivation of the known formulae for the scaling limits of the classical random matrix ensembles with unitary invariance, that is, the Gaussian unitary ensemble (GUE), the Wishart or Laguerre unitary ensemble (LUE), and the MANOVA (multivariate analysis of variance) or Jacobi unitary ensemble (JUE).

  20. History of POIC Capabilities and Limitations to Conduct International Space Station Payload Operations

    NASA Technical Reports Server (NTRS)

    Grimaldi, Rebecca; Horvath, Tim; Morris, Denise; Willis, Emily; Stacy, Lamar; Shell, Mike; Faust, Mark; Norwood, Jason

    2011-01-01

    Payload science operations on the International Space Station (ISS) have been conducted continuously twenty-four hours per day, 365 days a year beginning February, 2001 and continuing through present day. The Payload Operations Integration Center (POIC), located at the Marshall Space Flight Center in Huntsville, Alabama, has been a leader in integrating and managing NASA distributed payload operations. The ability to conduct science operations is a delicate balance of crew time, onboard vehicle resources, hardware up-mass to the vehicle, and ground based flight control team manpower. Over the span of the last ten years, the POIC flight control team size, function, and structure has been modified several times commensurate with the capabilities and limitations of the ISS program. As the ISS vehicle has been expanded and its systems changed throughout the assembly process, the resources available to conduct science and research have also changed. Likewise, as ISS program financial resources have demanded more efficiency from organizations across the program, utilization organizations have also had to adjust their functionality and structure to adapt accordingly. The POIC has responded to these often difficult challenges by adapting our team concept to maximize science research return within the utilization allocations and vehicle limitations that existed at the time. In some cases, the ISS and systems limitations became the limiting factor in conducting science. In other cases, the POIC structure and flight control team size were the limiting factors, so other constraints had to be put into place to assure successful science operations within the capabilities of the POIC. This paper will present the POIC flight control team organizational changes responding to significant events of the ISS and Shuttle programs.

  1. Two Decades of WRF/CMAQ simulations over the continental United States: New approaches for performing dynamic model evaluation and determining confidence limits for ozone exceedances

    EPA Science Inventory

    Confidence in the application of models for forecasting and regulatory assessments is furthered by conducting four types of model evaluation: operational, dynamic, diagnostic, and probabilistic. Operational model evaluation alone does not reveal the confidence limits that can be ...

  2. A consistent collinear triad approximation for operational wave models

    NASA Astrophysics Data System (ADS)

    Salmon, J. E.; Smit, P. B.; Janssen, T. T.; Holthuijsen, L. H.

    2016-08-01

    In shallow water, the spectral evolution associated with energy transfers due to three-wave (or triad) interactions is important for the prediction of nearshore wave propagation and wave-driven dynamics. The numerical evaluation of these nonlinear interactions involves the evaluation of a weighted convolution integral in both frequency and directional space for each frequency-direction component in the wave field. For reasons of efficiency, operational wave models often rely on a so-called collinear approximation that assumes that energy is only exchanged between wave components travelling in the same direction (collinear propagation) to eliminate the directional convolution. In this work, we show that the collinear approximation as presently implemented in operational models is inconsistent. This causes energy transfers to become unbounded in the limit of unidirectional waves (narrow aperture), and results in the underestimation of energy transfers in short-crested wave conditions. We propose a modification to the collinear approximation to remove this inconsistency and to make it physically more realistic. Through comparison with laboratory observations and results from Monte Carlo simulations, we demonstrate that the proposed modified collinear model is consistent, remains bounded, smoothly converges to the unidirectional limit, and is numerically more robust. Our results show that the modifications proposed here result in a consistent collinear approximation, which remains bounded and can provide an efficient approximation to model nonlinear triad effects in operational wave models.

  3. Disease prediction models and operational readiness.

    PubMed

    Corley, Courtney D; Pullum, Laura L; Hartley, David M; Benedum, Corey; Noonan, Christine; Rabinowitz, Peter M; Lancaster, Mary J

    2014-01-01

    The objective of this manuscript is to present a systematic review of biosurveillance models that operate on select agents and can forecast the occurrence of a disease event. We define a disease event to be a biological event with focus on the One Health paradigm. These events are characterized by evidence of infection and or disease condition. We reviewed models that attempted to predict a disease event, not merely its transmission dynamics and we considered models involving pathogens of concern as determined by the US National Select Agent Registry (as of June 2011). We searched commercial and government databases and harvested Google search results for eligible models, using terms and phrases provided by public health analysts relating to biosurveillance, remote sensing, risk assessments, spatial epidemiology, and ecological niche modeling. After removal of duplications and extraneous material, a core collection of 6,524 items was established, and these publications along with their abstracts are presented in a semantic wiki at http://BioCat.pnnl.gov. As a result, we systematically reviewed 44 papers, and the results are presented in this analysis. We identified 44 models, classified as one or more of the following: event prediction (4), spatial (26), ecological niche (28), diagnostic or clinical (6), spread or response (9), and reviews (3). The model parameters (e.g., etiology, climatic, spatial, cultural) and data sources (e.g., remote sensing, non-governmental organizations, expert opinion, epidemiological) were recorded and reviewed. A component of this review is the identification of verification and validation (V&V) methods applied to each model, if any V&V method was reported. All models were classified as either having undergone Some Verification or Validation method, or No Verification or Validation. We close by outlining an initial set of operational readiness level guidelines for disease prediction models based upon established Technology Readiness

  4. Disease Prediction Models and Operational Readiness

    SciTech Connect

    Corley, Courtney D.; Pullum, Laura L.; Hartley, David M.; Benedum, Corey M.; Noonan, Christine F.; Rabinowitz, Peter M.; Lancaster, Mary J.

    2014-03-19

    INTRODUCTION: The objective of this manuscript is to present a systematic review of biosurveillance models that operate on select agents and can forecast the occurrence of a disease event. One of the primary goals of this research was to characterize the viability of biosurveillance models to provide operationally relevant information for decision makers to identify areas for future research. Two critical characteristics differentiate this work from other infectious disease modeling reviews. First, we reviewed models that attempted to predict the disease event, not merely its transmission dynamics. Second, we considered models involving pathogens of concern as determined by the US National Select Agent Registry (as of June 2011). Methods: We searched dozens of commercial and government databases and harvested Google search results for eligible models utilizing terms and phrases provided by public health analysts relating to biosurveillance, remote sensing, risk assessments, spatial epidemiology, and ecological niche-modeling, The publication date of search results returned are bound by the dates of coverage of each database and the date in which the search was performed, however all searching was completed by December 31, 2010. This returned 13,767 webpages and 12,152 citations. After de-duplication and removal of extraneous material, a core collection of 6,503 items was established and these publications along with their abstracts are presented in a semantic wiki at http://BioCat.pnnl.gov. Next, PNNL’s IN-SPIRE visual analytics software was used to cross-correlate these publications with the definition for a biosurveillance model resulting in the selection of 54 documents that matched the criteria resulting Ten of these documents, However, dealt purely with disease spread models, inactivation of bacteria, or the modeling of human immune system responses to pathogens rather than predicting disease events. As a result, we systematically reviewed 44 papers and the

  5. Disease Prediction Models and Operational Readiness

    PubMed Central

    Corley, Courtney D.; Pullum, Laura L.; Hartley, David M.; Benedum, Corey; Noonan, Christine; Rabinowitz, Peter M.; Lancaster, Mary J.

    2014-01-01

    The objective of this manuscript is to present a systematic review of biosurveillance models that operate on select agents and can forecast the occurrence of a disease event. We define a disease event to be a biological event with focus on the One Health paradigm. These events are characterized by evidence of infection and or disease condition. We reviewed models that attempted to predict a disease event, not merely its transmission dynamics and we considered models involving pathogens of concern as determined by the US National Select Agent Registry (as of June 2011). We searched commercial and government databases and harvested Google search results for eligible models, using terms and phrases provided by public health analysts relating to biosurveillance, remote sensing, risk assessments, spatial epidemiology, and ecological niche modeling. After removal of duplications and extraneous material, a core collection of 6,524 items was established, and these publications along with their abstracts are presented in a semantic wiki at http://BioCat.pnnl.gov. As a result, we systematically reviewed 44 papers, and the results are presented in this analysis. We identified 44 models, classified as one or more of the following: event prediction (4), spatial (26), ecological niche (28), diagnostic or clinical (6), spread or response (9), and reviews (3). The model parameters (e.g., etiology, climatic, spatial, cultural) and data sources (e.g., remote sensing, non-governmental organizations, expert opinion, epidemiological) were recorded and reviewed. A component of this review is the identification of verification and validation (V&V) methods applied to each model, if any V&V method was reported. All models were classified as either having undergone Some Verification or Validation method, or No Verification or Validation. We close by outlining an initial set of operational readiness level guidelines for disease prediction models based upon established Technology Readiness

  6. Data rate management and real time operation: recursive adaptive frame integration of limited data

    NASA Astrophysics Data System (ADS)

    Rafailov, Michael K.

    2006-08-01

    Recursive Limited Frame Integration was proposed as a way to improve frame integration performance and mitigate issues related to high data rate needed to support conventional frame integration. The technique uses two thresholds -one tuned for optimum probability of detection, the other to manage required false alarm rate, and places integration process between those thresholds. This configuration allows a non-linear integration process that, along with Signal-to-Noise Ratio (SNR) gain, provides system designers more capability where cost, weight, or power considerations limit system data rate, processing, or memory capability. However, Recursive Frame Integration Limited may have performance issues when single-frame SNR is really low. Recursive Adaptive Limited Frame Integration was proposed as a means to improve limited integration performance with really low single-frame SNR. It combines the benefits of nonlinear recursive limited frame integration and adaptive thresholds with a kind of conventional frame integration. Adding the third threshold may help in managing real time operations. In the paper the Recursive Frame Integration is presented in form of multiple parallel recursive integration. Such an approach can help not only in data rate management but in mitigation of low single frame SNR issue for Recursive Integration as well as in real time operations with frame integration.

  7. Operations for Learning with Graphical Models

    NASA Technical Reports Server (NTRS)

    Buntine, Wray L.

    1994-01-01

    This paper is a multidisciplinary review of empirical, statistical learning from a graphical model perspective. Well-known examples of graphical models include Bayesian net- works, directed graphs representing a Markov chain, and undirected networks representing a Markov field. These graphical models are extended to model data analysis and empirical learning using the notation of plates. Graphical operations for simplifying and manipulating a problem are provided including decomposition, differentiation, and the manipulation of probability models from the exponential family. These operations adapt existing techniques from statistics and automatic differentiation to graphs. Two standard algorithm schemes for learning are reviewed in a graphical framework: Gibbs sampling and the expectation maximization algorithm. Some algorithms are developed in this graphical framework including a generalized version of linear regression, techniques for feed-forward networks, and learning Gaussian and discrete Bayesian networks from data. The paper concludes by sketching some implications for data analysis and summarizing some popular algorithms that fall within the framework presented. The main original contributions here are the decomposition techniques and the demonstration that graphical models provide a framework for understanding and developing complex learning algorithms.

  8. Limiter

    DOEpatents

    Cohen, S.A.; Hosea, J.C.; Timberlake, J.R.

    1984-10-19

    A limiter with a specially contoured front face is provided. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution. This limiter shape accommodates the various power scrape-off distances lambda p, which depend on the parallel velocity, V/sub parallel/, of the impacting particles.

  9. Algebraic operator approach to gas kinetic models

    NASA Astrophysics Data System (ADS)

    Il'ichov, L. V.

    1997-02-01

    Some general properties of the linear Boltzmann kinetic equation are used to present it in the form ∂ tϕ = - †Âϕ with the operators Âand† possessing some nontrivial algebraic properties. When applied to the Keilson-Storer kinetic model, this method gives an example of quantum ( q-deformed) Lie algebra. This approach provides also a natural generalization of the “kangaroo model”.

  10. Modelling of the District Heating System's Operation

    NASA Astrophysics Data System (ADS)

    Vigants, Girts; Blumberga, Dagnija; Vīgants, Ģirts; Blumberga, Dagnija

    2011-01-01

    The development of a district heating systems calculation model means improvement in the energy efficiency of a district heating system, which makes it possible to reduce the heat losses, thus positively affecting the tariffs on thermal energy. In this paper, a universal approach is considered, based on which the optimal flow and temperature conditions in a district heating system network could be calculated. The optimality is determined by the least operational costs. The developed calculation model has been tested on the Ludza district heating system based on the technical parameters of this system.

  11. Human Operator Modeling for Aerial Tracking.

    DTIC Science & Technology

    1980-12-01

    HUMAN OPERATOR MODELING FOR AERIAL TRACKING JONA THAN KORN ARTER. EPHRATH DA VLD L. KLEINMAN DBCXMBt 19MDTICSELECTE APR 3 1981.j B Approwd for pVA& u...8217the "Guid 8en th Cart end Use of laboratory Animals, "Inatitate of Laboratory Animl ReaNuWAes, National Rtesarch CouncL The voluntary Infomed consent...Continue. on reverse aide If necessary and identify hc block numbrh) ._Modern Optimal Control techniques are e:iployed to investigate and model human

  12. Maximally Expressive Modeling of Operations Tasks

    NASA Technical Reports Server (NTRS)

    Jaap, John; Richardson, Lea; Davis, Elizabeth

    2002-01-01

    Planning and scheduling systems organize "tasks" into a timeline or schedule. The tasks are defined within the scheduling system in logical containers called models. The dictionary might define a model of this type as "a system of things and relations satisfying a set of rules that, when applied to the things and relations, produce certainty about the tasks that are being modeled." One challenging domain for a planning and scheduling system is the operation of on-board experiments for the International Space Station. In these experiments, the equipment used is among the most complex hardware ever developed, the information sought is at the cutting edge of scientific endeavor, and the procedures are intricate and exacting. Scheduling is made more difficult by a scarcity of station resources. The models to be fed into the scheduler must describe both the complexity of the experiments and procedures (to ensure a valid schedule) and the flexibilities of the procedures and the equipment (to effectively utilize available resources). Clearly, scheduling International Space Station experiment operations calls for a "maximally expressive" modeling schema.

  13. Modelling safety of gantry crane operations using Petri nets.

    PubMed

    Singh, Karmveer; Raj, Navneet; Sahu, S K; Behera, R K; Sarkar, Sobhan; Maiti, J

    2017-03-01

    Being a powerful tool in modelling industrial and service operations, Petri net (PN) has been extremely used in different domains, but its application in safety study is limited. In this study, we model the gantry crane operations used for industrial activities using generalized stochastic PNs. The complete cycle of operations of the gantry crane is split into three parts namely inspection and loading, movement of load, and unloading of load. PN models are developed for all three parts and the whole system as well. The developed PN models have captured the safety issues through reachability tree. The hazardous states are identified and how they ultimately lead to some unwanted accidents is demonstrated. The possibility of falling of load and failure of hook, sling, attachment and hoist rope are identified. Possible suggestions based on the study are presented for redesign of the system. For example, mechanical stoppage of operations in case of loosely connected load, and warning system for use of wrong buttons is tested using modified models.

  14. 40 CFR Table 3 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Mercury Emission Limits and Boilers and...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Process Heaters With Mercury Emission Limits and Boilers and Process Heaters That Choose To Comply With... Heaters With Mercury Emission Limits and Boilers and Process Heaters That Choose To Comply With the... operating limits: If you demonstrate compliance with applicable mercury and/or total selected...

  15. 40 CFR Table 3 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Mercury Emission Limits and Boilers and...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Process Heaters With Mercury Emission Limits and Boilers and Process Heaters That Choose To Comply With... Heaters With Mercury Emission Limits and Boilers and Process Heaters That Choose To Comply With the... operating limits: If you demonstrate compliance with applicable mercury and/or total selected...

  16. Limiter heat loads during the first operation of the W7-X stellarator

    NASA Astrophysics Data System (ADS)

    Wurden, Glen; Niemann, Holger; Jakubowski, Marcin; Bozhenkov, Sergey; Biedermann, Christoph; Marsen, Stefan; Effenberg, Florian; Stephey, Laurie; Schmitz, Oliver; W7-X Team

    2016-10-01

    During the first operational phase (OP1.1) of the new W7-X stellarator, five poloidal graphite limiters served as the main boundary for the plasma. There was a dedicated set of diagnostics to observe the performance of the temporary poloidal limiters and infer basic transport behavior of the 3-D helical SOL plasma. We describe IR imaging of the limiters, which resulted in observations of 1) heat flux determination as a function of time and space, 2) total energy into the limiters, 3) high-frequency helical patterns of energy bursts onto the limiters, 4) changes in surface emissivity, and 5) detection of UFO's (small-to-large dusts). These measurements were made in 2 magnetic configuration discharges (differing iota), and in ones where the power loads to the limiters were systematically modified by the use of trim coils. Observed power fractions on the limiters ranged from 40% to 20% of the 0.6 to 4 MW ECRH input powers. Acknowledgement: Funded under DOE LANS Contract DE-AC5026NA25396 and DE-SC0014210, and within the EUROfusion Consortium under Euratom Grant 633053.

  17. SY-101 Rapid Transfer Project Low Temperature Operations Review and Recommendations to Support Lower Temperature Limits

    SciTech Connect

    HICKMAN, G.L.

    2000-01-10

    The lower temperature limit for the 241 SY-101 RAPID transfer project is currently set at 20 F Based on the analysis and recommendations in this document this limit can be lowered to 0 F. Analysis of all structures systems and components (SSCs) indicate that a reduction in operating temperature may be achieved with minor modifications to field-installed equipment. Following implementation of these changes it is recommended that the system requirements be amended to specify a temperature range for transfer or back dilute evolutions of 0 F to 100 F.

  18. Budgeting Facilities Operation Costs Using the Facilities Operation Model

    DTIC Science & Technology

    2011-06-01

    OF ACRONYMS AND ABBREVIATIONS BOS - Base Operating Support CNIC - Commander, Navy Installations Command COLS - Common Output Level Standard DECA ...of several different funding sources. Naval Support Activity Washington has five organizations (Navy Active, DECA , DODEA, DLA, and Other) forecasted

  19. Limiter

    DOEpatents

    Cohen, Samuel A.; Hosea, Joel C.; Timberlake, John R.

    1986-01-01

    A limiter with a specially contoured front face accommodates the various power scrape-off distances .lambda..sub.p, which depend on the parallel velocity, V.sub..parallel., of the impacting particles. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution.

  20. 40 CFR 63.5698 - What emission limit must I meet for open molding resin and gel coat operations?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... open molding resin and gel coat operations? 63.5698 Section 63.5698 Protection of Environment... Manufacturing Standards for Open Molding Resin and Gel Coat Operations § 63.5698 What emission limit must I meet for open molding resin and gel coat operations? (a) You must limit organic HAP emissions from the...

  1. 40 CFR 63.5698 - What emission limit must I meet for open molding resin and gel coat operations?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... open molding resin and gel coat operations? 63.5698 Section 63.5698 Protection of Environment... Manufacturing Standards for Open Molding Resin and Gel Coat Operations § 63.5698 What emission limit must I meet for open molding resin and gel coat operations? (a) You must limit organic HAP emissions from the...

  2. Animal models in virus research: their utility and limitations.

    PubMed

    Louz, Derrick; Bergmans, Hans E; Loos, Birgit P; Hoeben, Rob C

    2013-11-01

    Viral diseases are important threats to public health worldwide. With the number of emerging viral diseases increasing the last decades, there is a growing need for appropriate animal models for virus studies. The relevance of animal models can be limited in terms of mimicking human pathophysiology. In this review, we discuss the utility of animal models for studies of influenza A viruses, HIV and SARS-CoV in light of viral emergence, assessment of infection and transmission risks, and regulatory decision making. We address their relevance and limitations. The susceptibility, immune responses, pathogenesis, and pharmacokinetics may differ between the various animal models. These complexities may thwart translating results from animal experiments to the humans. Within these constraints, animal models are very informative for studying virus immunopathology and transmission modes and for translation of virus research into clinical benefit. Insight in the limitations of the various models may facilitate further improvements of the models.

  3. A predictive model for the tokamak density limit

    NASA Astrophysics Data System (ADS)

    Teng, Q.; Brennan, D. P.; Delgado-Aparicio, L.; Gates, D. A.; Swerdlow, J.; White, R. B.

    2016-10-01

    The Greenwald density limit, found in all tokamak experiments, is reproduced for the first time using a phenomenologically correct model with parameters in the range of experiments. A simple model of equilibrium evolution and local power balance inside the island has been implemented to calculate the radiation-driven thermo-resistive tearing mode growth and explain the density limit. Strong destabilization of the tearing mode due to an imbalance of local Ohmic heating and radiative cooling in the island predicts the density limit within a few percent. The density limit is found to be a local edge limit and weakly dependent on impurity densities. Results are robust to a substantial variation in model parameters within the range of experiments.

  4. A predictive model for the tokamak density limit

    SciTech Connect

    Teng, Q.; Brennan, D. P.; Delgado-Aparicio, L.; Gates, D. A.; Swerdlow, J.; White, R. B.

    2016-07-28

    We reproduce the Greenwald density limit, in all tokamak experiments by using a phenomenologically correct model with parameters in the range of experiments. A simple model of equilibrium evolution and local power balance inside the island has been implemented to calculate the radiation-driven thermo-resistive tearing mode growth and explain the density limit. Strong destabilization of the tearing mode due to an imbalance of local Ohmic heating and radiative cooling in the island predicts the density limit within a few percent. Furthermore, we found the density limit and it is a local edge limit and weakly dependent on impurity densities. Our results are robust to a substantial variation in model parameters within the range of experiments.

  5. A predictive model for the tokamak density limit

    DOE PAGES

    Teng, Q.; Brennan, D. P.; Delgado-Aparicio, L.; ...

    2016-07-28

    We reproduce the Greenwald density limit, in all tokamak experiments by using a phenomenologically correct model with parameters in the range of experiments. A simple model of equilibrium evolution and local power balance inside the island has been implemented to calculate the radiation-driven thermo-resistive tearing mode growth and explain the density limit. Strong destabilization of the tearing mode due to an imbalance of local Ohmic heating and radiative cooling in the island predicts the density limit within a few percent. Furthermore, we found the density limit and it is a local edge limit and weakly dependent on impurity densities. Ourmore » results are robust to a substantial variation in model parameters within the range of experiments.« less

  6. An Error Score Model for Time-Limit Tests

    ERIC Educational Resources Information Center

    Ven, A. H. G. S. van der

    1976-01-01

    A more generalized error model for time-limit tests is developed. Model estimates are derived for right-attempted and wrong-attempted correlations both within the same test and between different tests. A comparison is made between observed correlations and their model counterparts and a fair agreement is found between observed and expected…

  7. JET-ISX-B beryllium limiter experiment safety analysis report and operational safety requirements

    SciTech Connect

    Edmonds, P.H.

    1985-09-01

    An experiment to evaluate the suitability of beryllium as a limiter material has been completed on the ISX-B tokamak. The experiment consisted of two phases: (1) the initial operation and characterization in the ISX experiment, and a period of continued operation to the specified surface fluence (10/sup 22/ atoms/cm/sup 2/) of hydrogen ions; and (2) the disassembly, decontamination, or disposal of the ISX facility. During these two phases of the project, the possibility existed for beryllium and/or beryllium oxide powder to be produced inside the vacuum vessel. Beryllium dust is a highly toxic material, and extensive precautions are required to prevent the release of the beryllium into the experimental work area and to prevent the contamination of personnel working on the device. Details of the health hazards associated with beryllium and the appropriate precautions are presented. Also described in appendixes to this report are the various operational safety requirements for the project.

  8. MODELING OPERANT BEHAVIOR IN THE PARKINSONIAN RAT

    PubMed Central

    Avila, Irene; Reilly, Mark P.; Sanabria, Federico; Posadas-Sánchez, Diana; Chavez, Claudia L.; Banerjee, Nikhil; Killeen, Peter; Castañeda, Edward

    2009-01-01

    Mathematical principles of reinforcement (MPR; Killeen, 1994) is a quantitative model of operant behavior that contains 3 parameters representing motor capacity (δ), motivation (a), and short term memory (λ). The present study applied MPR to characterize the effects of bilateral infusions of 6-OHDA into the substantia nigra pars compacta in the rat, a model of Parkinson’s disease. Rats were trained to lever press under a 5-component fixed ratio (5, 15, 30, 60, and 100) schedule of food reinforcement. Rats were tested for 15 days prior to dopamine lesions and again for 15 days post-lesion. To characterize functional loss relative to lesion size, rats were grouped according to the extent and the degree of lateralization of their dopamine loss. Response rates decreased as a function of dopamine depletion, primarily at intermediate ratios. MPR accounted for 98% of variance in pre- and post-lesion response rates. Consistent with reported disruptions in motor behavior induced by dopaminergic lesions, estimates of δ increased when dopamine was severely depleted. There was no support for different estimates of a based on pre- and post-lesion performance of any lesion group, suggesting that dopamine loss has negligible effects on incentive motivation. The present study demonstrates the usefulness of combining operant techniques with a theoretical model to better understand the effects of a neurochemical manipulation. PMID:19073222

  9. Limited field investigation report for the 100-HR-1 Operable Unit

    SciTech Connect

    Not Available

    1994-08-01

    This limited field investigation (LFI) report summarizes the data collection and analysis activities conducted during the 100-HR-1 Source Operable Unit LFI and the associated qualitative risk assessment (QRA) (WHC 1993a), and makes recommendations on the continued candidacy of high-priority sites for interim remedial measures (IRM). The results and recommendations presented in this report are generally independent of future land use scenarios. A LFI Report is required, in accordance with the HPPS, when waste sites are to be considered for IRMs. The LFI is an integral part of the remedial investigation/feasibility study (RI/FS) or Resource Conservation and Recovery Act (RCRA) facility investigation/corrective measures study (RFI/CMS) and process and functions as a focused RI or RFI for selection of IRMs. The purpose of the report is to identify those sites that are recommended to remain as candidates for IRMs, provide a preliminary summary of site characterization studies, refine the conceptual model as needed, identify contaminant- and location-specific applicable or relevant and appropriate requirements (ARA), and provide a qualitative assessment of the risks associated with the sites. This assessment includes consideration of whether contaminant concentrations pose an unacceptable risk that warrants action through IRMs. The 100-HR-1 unit encompasses approximately 100 acres adjacent to the Columbia River shoreline. It contains waste units associated with the original plant facilities constructed to support the H Reactor. The area also contains evaporation basins which received liquid process wastes and nonroutine deposits of chemical wastes from the 300 Area, where fuel elements for the N Reactor were produced.

  10. Preliminary Study of Ideal Operational MHD Beta Limit in HL-2A Tokamak Plasmas

    NASA Astrophysics Data System (ADS)

    Shen, Yong; Dong, Jiaqi; He, Hongda; D. Turnbull, A.

    2009-04-01

    Magnetohydrodynamic (MHD) n = 1 kink mode with n the toroidal mode number is studied and the operational beta limit, constrained by the mode, is calculated for the equilibrium of HL-2A by using the GATO code. Approximately the same beta limit is obtained for configurations with a value of the axial safety factor q0 both larger and less than 1. Without the stabilization of the conducting wall, the beta limit is found to be 0.821% corresponding to a normalized beta value of βcN = 2.56 for a typical HL-2A discharge with a plasma current Ip = 0.245 MA, and the scaling of βcN ~constant is confirmed.

  11. Variable strategy model of the human operator

    NASA Astrophysics Data System (ADS)

    Phillips, John Michael

    Human operators often employ discontinuous or "bang-bang" control strategies when performing large-amplitude acquisition tasks. The current study applies Variable Structure Control (VSC) techniques to model human operator behavior during acquisition tasks. The result is a coupled, multi-input model replicating the discontinuous control strategy. In the VSC formulation, a switching surface is the mathematical representation of the operator's control strategy. The performance of the Variable Strategy Model (VSM) is evaluated by considering several examples, including the longitudinal control of an aircraft during the visual landing task. The aircraft landing task becomes an acquisition maneuver whenever large initial offsets occur. Several different strategies are explored in the VSM formulation for the aircraft landing task. First, a switching surface is constructed from literal interpretations of pilot training literature. This approach yields a mathematical representation of how a pilot is trained to fly a generic aircraft. This switching surface is shown to bound the trajectory response of a group of pilots performing an offset landing task in an aircraft simulator study. Next, front-side and back-side landing strategies are compared. A back-side landing strategy is found to be capable of landing an aircraft flying on either the front side or back side of the power curve. However, the front-side landing strategy is found to be insufficient for landing an aircraft flying on the back side. Finally, a more refined landing strategy is developed that takes into the account the specific aircraft's dynamic characteristics. The refined strategy is translated back into terminology similar to the existing pilot training literature.

  12. A space transportation system operations model

    NASA Technical Reports Server (NTRS)

    Morris, W. Douglas; White, Nancy H.

    1987-01-01

    Presented is a description of a computer program which permits assessment of the operational support requirements of space transportation systems functioning in both a ground- and space-based environment. The scenario depicted provides for the delivery of payloads from Earth to a space station and beyond using upper stages based at the station. Model results are scenario dependent and rely on the input definitions of delivery requirements, task times, and available resources. Output is in terms of flight rate capabilities, resource requirements, and facility utilization. A general program description, program listing, input requirements, and sample output are included.

  13. Modeling limit languages via limit adjacency matrix and Yusof-Goode approaches

    NASA Astrophysics Data System (ADS)

    Lim, Wen Li, Yusof, Yuhani

    2015-05-01

    Limit language was introduced by Goode and Pixton in 2004 under the framework of formal language theory. It is a subset of splicing languages which is restricted to the molecules that will be presented in the splicing system after the reaction of biochemical has run to its completion. In this paper, limit adjacency matrix will be introduced to model the existence of limit languages from splicing languages. Besides, it can be used to characterize the splicing language in terms of active persistent, adult/inert and transient properties based on Yusof-Goode splicing system. In this paper, some examples and theorems that have been formulated via limit adjacency matrix approach will be presented too.

  14. 40 CFR Table 16 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Reforming Units

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... control device . . . You shall meet this operating limit during initial catalyst depressuring and purging... catalyst purging conditions that must be met prior to allowing uncontrolled purge releases....

  15. 40 CFR Table 16 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Reforming Units

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... control device . . . You shall meet this operating limit during initial catalyst depressuring and purging... catalyst purging conditions that must be met prior to allowing uncontrolled purge releases....

  16. Modeling lift operations with SASmacr Simulation Studio

    NASA Astrophysics Data System (ADS)

    Kar, Leow Soo

    2016-10-01

    Lifts or elevators are an essential part of multistorey buildings which provide vertical transportation for its occupants. In large and high-rise apartment buildings, its occupants are permanent, while in buildings, like hospitals or office blocks, the occupants are temporary or users of the buildings. They come in to work or to visit, and thus, the population of such buildings are much higher than those in residential apartments. It is common these days that large office blocks or hospitals have at least 8 to 10 lifts serving its population. In order to optimize the level of service performance, different transportation schemes are devised to control the lift operations. For example, one lift may be assigned to solely service the even floors and another solely for the odd floors, etc. In this paper, a basic lift system is modelled using SAS Simulation Studio to study the effect of factors such as the number of floors, capacity of the lift car, arrival rate and exit rate of passengers at each floor, peak and off peak periods on the system performance. The simulation is applied to a real lift operation in Sunway College's North Building to validate the model.

  17. Impact of ideal MHD stability limits on high-beta hybrid operation

    NASA Astrophysics Data System (ADS)

    Piovesan, P.; Igochine, V.; Turco, F.; Ryan, D. A.; Cianciosa, M. R.; Liu, Y. Q.; Marrelli, L.; Terranova, D.; Wilcox, R. S.; Wingen, A.; Angioni, C.; Bock, A.; Chrystal, C.; Classen, I.; Dunne, M.; Ferraro, N. M.; Fischer, R.; Gude, A.; Holcomb, C. T.; Lebschy, A.; Luce, T. C.; Maraschek, M.; McDermott, R.; Odstrčil, T.; Paz-Soldan, C.; Reich, M.; Sertoli, M.; Suttrop, W.; Taylor, N. Z.; Weiland, M.; Willensdorfer, M.; The ASDEX Upgrade Team; The DIII-D Team; The EUROfusion MST1 Team

    2017-01-01

    The hybrid scenario is a candidate for stationary high-fusion gain tokamak operation in ITER and DEMO. To obtain such performance, the energy confinement and the normalized pressure {βN} must be maximized, which requires operating near or above ideal MHD no-wall limits. New experimental findings show how these limits can affect hybrid operation. Even if hybrids are mainly limited by tearing modes, proximity to the no-wall limit leads to 3D field amplification that affects plasma profiles, e.g. rotation braking is observed in ASDEX Upgrade throughout the plasma and peaks in the core. As a result, even the small ASDEX Upgrade error fields are amplified and their effects become visible. To quantify such effects, ASDEX Upgrade measured the response to 3D fields applied by 8× 2 non-axisymmetric coils as {βN} approaches the no-wall limit. The full n  =  1 response profile and poloidal structure were measured by a suite of diagnostics and compared with linear MHD simulations, revealing a characteristic feature of hybrids: the n  =  1 response is due to a global, marginally-stable n  =  1 kink characterized by a large m  =  1, n  =  1 core harmonic due to q min being just above 1. A helical core distortion of a few cm forms and affects various core quantities, including plasma rotation, electron and ion temperature, and intrinsic W density. In similar experiments, DIII-D also measured the effect of this helical core on the internal current profile, providing information useful to understanding of the physics of magnetic flux pumping, i.e. anomalous current redistribution by MHD modes that keeps {{q}\\text{min}}>1 . Thanks to flux pumping, a broad current profile is maintained in DIII-D even with large on-axis current drive, enabling fully non-inductive operation at high {βN} up to 3.5-4.

  18. Limiting case of modified electroweak model for contracted gauge group

    SciTech Connect

    Gromov, N. A.

    2011-06-15

    The modification of the Electroweak Model with 3-dimensional spherical geometry in the matter fields space is suggested. The Lagrangian of this model is given by the sum of the free (without any potential term) matter fields Lagrangian and the standard gauge fields Lagrangian. The vector boson masses are generated by transformation of this Lagrangian from Cartesian coordinates to coordinates on the sphere S{sup 3}. The limiting case of the bosonic part of the modified model, which corresponds to the contracted gauge group SU(2; j) x U(1) is discussed. Within framework of the limit model Z boson and electromagnetic fields can be regarded as external ones with respect to W-boson fields in the sence that W-boson fields do not effect on these external fields. The masses of all particles of the Electroweak Model remain the same, but field interactions in contracted model are more simple as compared with the standard Electroweak Model.

  19. 14 CFR 61.303 - If I want to operate a light-sport aircraft, what operating limits and endorsement requirements...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false If I want to operate a light-sport aircraft...) AIRMEN CERTIFICATION: PILOTS, FLIGHT INSTRUCTORS, AND GROUND INSTRUCTORS Sport Pilots § 61.303 If I want to operate a light-sport aircraft, what operating limits and endorsement requirements in this...

  20. 14 CFR 61.303 - If I want to operate a light-sport aircraft, what operating limits and endorsement requirements...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false If I want to operate a light-sport aircraft...) AIRMEN CERTIFICATION: PILOTS, FLIGHT INSTRUCTORS, AND GROUND INSTRUCTORS Sport Pilots § 61.303 If I want to operate a light-sport aircraft, what operating limits and endorsement requirements in this...

  1. 14 CFR 61.303 - If I want to operate a light-sport aircraft, what operating limits and endorsement requirements...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false If I want to operate a light-sport aircraft...) AIRMEN CERTIFICATION: PILOTS, FLIGHT INSTRUCTORS, AND GROUND INSTRUCTORS Sport Pilots § 61.303 If I want to operate a light-sport aircraft, what operating limits and endorsement requirements in this...

  2. Overcoming limitations of model-based diagnostic reasoning systems

    NASA Technical Reports Server (NTRS)

    Holtzblatt, Lester J.; Marcotte, Richard A.; Piazza, Richard L.

    1989-01-01

    The development of a model-based diagnostic system to overcome the limitations of model-based reasoning systems is discussed. It is noted that model-based reasoning techniques can be used to analyze the failure behavior and diagnosability of system and circuit designs as part of the system process itself. One goal of current research is the development of a diagnostic algorithm which can reason efficiently about large numbers of diagnostic suspects and can handle both combinational and sequential circuits. A second goal is to address the model-creation problem by developing an approach for using design models to construct the GMODS model in an automated fashion.

  3. A Formal Model of Capacity Limits in Working Memory

    ERIC Educational Resources Information Center

    Oberauer, Klaus; Kliegl, Reinhold

    2006-01-01

    A mathematical model of working-memory capacity limits is proposed on the key assumption of mutual interference between items in working memory. Interference is assumed to arise from overwriting of features shared by these items. The model was fit to time-accuracy data of memory-updating tasks from four experiments using nonlinear mixed effect…

  4. 40 CFR Table 3 to Subpart Ddddd of... - Operating Limits for Boilers and Process Heaters With Mercury Emission Limits and Boilers and...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 14 2012-07-01 2011-07-01 true Operating Limits for Boilers and Process Heaters With Mercury Emission Limits and Boilers and Process Heaters That Choose To Comply With... Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters Pt....

  5. Limited field investigation report for the 100-DR-1 Operable Unit

    SciTech Connect

    Not Available

    1994-06-01

    This limited field investigation (LFI) report summarizes the data collection and analysis activities conducted during the 100-DR-1 Source Operable Unite LFI and the associated qualitative risk assessment (QRA), and makes recommendations on the continued candidacy of high-priority sites for interim remedial measures (IRM). The results and recommendations presented in this report are generally independent of future land use scenarios. The 100-DR-1 Operable Unit is one of four operable units associated with the 100 D/DR Area at the Hanford Site. The 100-DR-1 Operable Unit encompasses approximately 1.5 km{sup 2} (0.59 mi{sup 2}) and is located immediately adjacent to the Columbia River shoreline. In general, it contains waste facilities associated with the original plant facilities constructed to support D Reactor facilities, as well as cooling water retention basin systems for both D and DR Reactors. The 100-DR-1 LFI began the investigative phase of the remedial investigation for a select number of high-priority sites. The LFI was performed to provide additional data needed to support selection, design and implementation of IRM, if needed. The LFI included data compilation, nonintrusive investigations, intrusive investigations, summarization of 100 Area aggregate studies, and data evaluation.

  6. Limited field investigation report for the 100-KR-4 Operable Unit

    SciTech Connect

    Not Available

    1994-07-01

    This limited field investigation (LFI) was conducted to optimize the use of interim remedial measures (IRM) for expediting clean up while maintaining a technically sound and cost-effective program. The 100-KR-4 Operable Unit is one of four operable units associated with the 100 K Area. Operable units KR-1, KR-2 and KR-3 address contaminant sources while 100-KR-4 addresses contamination present in the underlying groundwater. The IRM decision process for groundwater operable units is based on three aspects: (1) Is the concentration greater than Hanford background? (2) Does the concentration present a medium or high human-health risk? (3) Does the concentration exceed an ecologically based applicable, relevant and appropriate requirements (ARAR) or present an environmental hazard quotient > I? The primary methods of investigation used during this LFI were the installation of monitoring wells and sampling of groundwater. The samples collected from the groundwater and soils were submitted for laboratory analysis. Boreholes were surveyed for radiological contamination using downhole geophysical techniques to further delineate the location and degree of contamination. All soil samples were screened to ascertain the presence of volatile organic compounds and radionuclides. Analytical data were subjected to validation; all first round and a minimum of 10% of subsequent round data were validated.

  7. Operating limitations of high-speed jet-lubricated ball bearings

    NASA Technical Reports Server (NTRS)

    Zaretsky, E. V.; Signer, H.; Bamberger, E. N.

    1975-01-01

    A parametric study was performed with 120-mm bore angular-contact ball bearings having a nominal contact angle of 20 deg. The bearings either had an inner- or an outer-race land riding cage. Lubrication was by recirculating oil jets. The oil jets either had a single or dual orifice. Thrust load, speed, and lubricant flow rate were varied. Test results were compared with those previously reported and obtained from bearings of the same design which were under-race lubricated but run under the same conditions. Jet lubricated ball bearings were limited to speeds less than 2,500,000 DN. Bearings having inner-race land riding cages produced lower temperatures than bearings with outer-race land riding cages. For a given lubricant flow rate dual orifice jets produced lower bearing temperatures than single orifice jets. However, under-race lubrication produced under all conditions of operation lower bearing temperatures with no apparent bearing speed limitation.

  8. Identifying the limitations of conventional biofiltration of diffuse methane emissions at long-term operation.

    PubMed

    Gómez-Cuervo, S; Hernández, J; Omil, F

    2016-08-01

    There is growing international concern about the increasing levels of greenhouse gases in the atmosphere, particularly CO2 and methane. The emissions of methane derived from human activities are associated with large flows and very low concentrations, such as those emitted from landfills and wastewater treatment plants, among others. The present work was focused on the biological methane degradation at diffuse concentrations (0.2% vv(-1)) in a conventional biofilter using a mixture of compost, perlite and bark chips as carrier. An extensive characterization of the process was carried out at long-term operation (250 days) in a fully monitored pilot plant, achieving stable conditions during the entire period. Operational parameters such as waterings, nitrogen addition and inlet loads and contact time influences were evaluated. Obtained results indicate that empty bed residence times within 4-8 min are crucial to maximize elimination rates. Waterings and the type of nitrogen supplied in the nutrient solution (ammonia or nitrate) have a strong impact on the biofilter performance. The better results compatible with a stable operation were achieved using nitrate, with elimination capacities up to 7.6 ± 1.1 g CH4 m(-3 )h(-1). The operation at low inlet concentrations (IC) implied that removal rates obtained were quite limited (ranging 3-8 g CH4 m(-3 )h(-1)); however, these results could be significantly increased (up to 20.6 g CH4 m(-3) h(-1)) at higher IC, which indicates that the mass transfer from the gas to the liquid layer surrounding the biofilm is a key limitation of the process.

  9. Implementation of Mexico's Health Promotion Operational Model.

    PubMed

    Santos-Burgoa, Carlos; Rodríguez-Cabrera, Lucero; Rivero, Lilia; Ochoa, Jorge; Stanford, Adriana; Latinovic, Ljubica; Rueda, Gretel

    2009-01-01

    Mexico is undergoing profound health reform, extending health insurance to previously uninsured populations and changing the way health care services are delivered. Legislation enacted in 2003 and implemented in 2004 mandated funding and infrastructure that will allow 52% of Mexico's population to access medical care at no cost by 2010. This ambitious social reform has not been without challenges, particularly financial sustainability. Health promotion, because of its potential to prevent or delay chronic diseases and injuries and their associated costs, is a key component of health care reform. In 2006, the Ministry of Health's General Directorate of Health Promotion developed the Health Promotion Operational Model. Based on Ottawa Charter functions, the model integrates health promotion activities within the overall health care system. The main goal of this model is to build strong human capital and to improve organizational capacity for health promotion starting at the local level by training health care personnel to implement health promotion activities. Organizational development workshops started in 2006, and implementation plans in all 32 Mexican states were in place by end of 2008.

  10. EnergySolution's Clive Disposal Facility Operational Research Model - 13475

    SciTech Connect

    Nissley, Paul; Berry, Joanne

    2013-07-01

    EnergySolutions owns and operates a licensed, commercial low-level radioactive waste disposal facility located in Clive, Utah. The Clive site receives low-level radioactive waste from various locations within the United States via bulk truck, containerised truck, enclosed truck, bulk rail-cars, rail boxcars, and rail inter-modals. Waste packages are unloaded, characterized, processed, and disposed of at the Clive site. Examples of low-level radioactive waste arriving at Clive include, but are not limited to, contaminated soil/debris, spent nuclear power plant components, and medical waste. Generators of low-level radioactive waste typically include nuclear power plants, hospitals, national laboratories, and various United States government operated waste sites. Over the past few years, poor economic conditions have significantly reduced the number of shipments to Clive. With less revenue coming in from processing shipments, Clive needed to keep its expenses down if it was going to maintain past levels of profitability. The Operational Research group of EnergySolutions were asked to develop a simulation model to help identify any improvement opportunities that would increase overall operating efficiency and reduce costs at the Clive Facility. The Clive operations research model simulates the receipt, movement, and processing requirements of shipments arriving at the facility. The model includes shipment schedules, processing times of various waste types, labor requirements, shift schedules, and site equipment availability. The Clive operations research model has been developed using the WITNESS{sup TM} process simulation software, which is developed by the Lanner Group. The major goals of this project were to: - identify processing bottlenecks that could reduce the turnaround time from shipment arrival to disposal; - evaluate the use (or idle time) of labor and equipment; - project future operational requirements under different forecasted scenarios. By identifying

  11. Towards operational permafrost modeling for Norway

    NASA Astrophysics Data System (ADS)

    Westermann, S.; Lilleøren, K. S.; Schuler, T. V.; Gisnâs, K.; Etzelmüller, B.

    2012-04-01

    In the course of the 21st century, thawing of permafrost is expected to occur in large areas as a consequence of climate change, which could trigger a number of climatic feedback mechanisms on the local to global scale. As the vast and remote permafrost areas cannot be sufficiently covered by ground-based monitoring of soil temperatures in boreholes alone, it is desirable to exploit the wealth of multi-sensor-multi-source data to assess the thermal ground conditions on large scales. In Norway, permafrost conditions range from mountain permafrost over organic-rich wetlands to high-arctic permafrost in Svalbard. Furthermore, the availability of gridded data sets from various sources makes it a well-suited test region to evaluate the performance of soil thermal models run with different input data, which facilitates comparing and benchmarking requirements on data quality. Soil temperatures can be modeled using Fourier's law of heat conduction, so that the key challenge is to supply accurate time series of three key input variables at suitable spatial and temporal resolutions: 1. land surface temperature, 2. snow depth, and 3. soil and snow thermal properties. We developed a framework for transient and distributed modeling the ground thermal regime in Norway, CryoGRID 2.0. In the model, the subsurface heat flow is treated in terms of 1D heat conduction using the land or snow surface temperature as upper boundary condition. The model features a dynamical representation of the snow cover and explicitly accounts for the heat flux through the snow pack. The spatio-temporal distribution of ground temperatures is calculated for a spatial resolution of 1 km for mainland Norway. The model is driven by operationally gridded data of daily air temperature and snow depth available at http://senorge.no. These datasets are available for the period 1957 to date having a spatial resolution of 1 km2. Spatial distributions of the ground thermal properties (e.g. heat conductivity

  12. 40 CFR 63.7500 - What emission limits, work practice standards, and operating limits must I meet?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Industrial, Commercial, and Institutional Boilers and Process Heaters Emission Limits and Work Practice... 40 Protection of Environment 13 2010-07-01 2010-07-01 false What emission limits, work practice... PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS...

  13. 40 CFR Table 23 to Subpart Uuu of... - Operating Limits for Inorganic HAP Emission Limitations for Catalytic Reforming Units

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... below the limit established during the performance test. 4. Fixed-bed gas-solid adsorption system The daily average temperature of the gas entering or exiting the adsorption system must not exceed the limit established during the performance test; and the HCl concentration in the adsorption system exhaust gas...

  14. 40 CFR 60.2145 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... with nitrogen oxides, sulfur dioxide, and carbon monoxide using CEMS. You must determine compliance... CEMS to demonstrate continuous compliance with the nitrogen oxides emission limit, compliance with the nitrogen oxides emission limit may be demonstrated by using the CEMS specified in § 60.2165 to...

  15. 40 CFR 60.2145 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... use an acid gas wet scrubber. You must determine compliance with nitrogen oxides, sulfur dioxide... continuous emission monitoring system to demonstrate continuous compliance with the nitrogen oxides emission limit, compliance with the nitrogen oxides emission limit may be demonstrated by using the...

  16. 40 CFR 63.10023 - How do I establish my PM CPMS operating limit and determine compliance with it?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 15 2012-07-01 2012-07-01 false How do I establish my PM CPMS operating limit and determine compliance with it? 63.10023 Section 63.10023 Protection of Environment... § 63.10023 How do I establish my PM CPMS operating limit and determine compliance with it? (a)...

  17. 40 CFR Table 1 to Subpart IIIi of... - Operating Limits for Capture Systems and Add-On Control Devices

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 13 2013-07-01 2012-07-01 true Operating Limits for Capture Systems... Subpart IIII of Part 63—Operating Limits for Capture Systems and Add-On Control Devices If you are... consistent with the manufacturer's recommendations. 3. Regenerative carbon adsorber a. The total...

  18. 40 CFR Table 9 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Cracking Units

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 13 2013-07-01 2012-07-01 true Operating Limits for Organic HAP Emissions From Catalytic Cracking Units 9 Table 9 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 9 Table 9 to Subpart UUU of Part 63—Operating Limits for Organic...

  19. 40 CFR Table 16 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Reforming Units

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 13 2012-07-01 2012-07-01 false Operating Limits for Organic HAP Emissions From Catalytic Reforming Units 16 Table 16 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 16 Table 16 to Subpart UUU of Part 63—Operating Limits for Organic...

  20. 40 CFR Table 9 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Cracking Units

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 12 2010-07-01 2010-07-01 true Operating Limits for Organic HAP Emissions From Catalytic Cracking Units 9 Table 9 to Subpart UUU of Part 63 Protection of Environment..., Subpt. UUU, Table 9 Table 9 to Subpart UUU of Part 63—Operating Limits for Organic HAP Emissions...

  1. 40 CFR Table 9 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Cracking Units

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 13 2012-07-01 2012-07-01 false Operating Limits for Organic HAP Emissions From Catalytic Cracking Units 9 Table 9 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 9 Table 9 to Subpart UUU of Part 63—Operating Limits for Organic...

  2. 40 CFR Table 16 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Reforming Units

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 13 2013-07-01 2012-07-01 true Operating Limits for Organic HAP Emissions From Catalytic Reforming Units 16 Table 16 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 16 Table 16 to Subpart UUU of Part 63—Operating Limits for Organic...

  3. 40 CFR Table 9 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Cracking Units

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 13 2014-07-01 2014-07-01 false Operating Limits for Organic HAP Emissions From Catalytic Cracking Units 9 Table 9 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 9 Table 9 to Subpart UUU of Part 63—Operating Limits for Organic...

  4. 40 CFR Table 16 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Reforming Units

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 13 2014-07-01 2014-07-01 false Operating Limits for Organic HAP Emissions From Catalytic Reforming Units 16 Table 16 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 16 Table 16 to Subpart UUU of Part 63—Operating Limits for Organic...

  5. 40 CFR Table 9 to Subpart Uuu of... - Operating Limits for Organic HAP Emissions From Catalytic Cracking Units

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 12 2011-07-01 2009-07-01 true Operating Limits for Organic HAP Emissions From Catalytic Cracking Units 9 Table 9 to Subpart UUU of Part 63 Protection of Environment..., Subpt. UUU, Table 9 Table 9 to Subpart UUU of Part 63—Operating Limits for Organic HAP Emissions...

  6. 40 CFR Table 28 to Subpart Uuu of... - Continuous Compliance With Operating Limits for Inorganic HAP Emissions From Catalytic Reforming...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... operating limit . . . You shall demonstrate continuous compliance during coke burn-off and catalyst... concentration in the catalyst regenerator exhaust gas must not exceed the limit established during the... catalyst rejuvenation; implementing procedures in the operating and maintenance plan if the...

  7. 40 CFR Table 2 to Subpart Uuu of... - Operating Limits for Metal HAP Emissions From Catalytic Cracking Units

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 13 2013-07-01 2012-07-01 true Operating Limits for Metal HAP Emissions From Catalytic Cracking Units 2 Table 2 to Subpart UUU of Part 63 Protection of Environment... Units Pt. 63, Subpt. UUU, Table 2 Table 2 to Subpart UUU of Part 63—Operating Limits for Metal...

  8. A Final Approach Trajectory Model for Current Operations

    NASA Technical Reports Server (NTRS)

    Gong, Chester; Sadovsky, Alexander

    2010-01-01

    Predicting accurate trajectories with limited intent information is a challenge faced by air traffic management decision support tools in operation today. One such tool is the FAA's Terminal Proximity Alert system which is intended to assist controllers in maintaining safe separation of arrival aircraft during final approach. In an effort to improve the performance of such tools, two final approach trajectory models are proposed; one based on polynomial interpolation, the other on the Fourier transform. These models were tested against actual traffic data and used to study effects of the key final approach trajectory modeling parameters of wind, aircraft type, and weight class, on trajectory prediction accuracy. Using only the limited intent data available to today's ATM system, both the polynomial interpolation and Fourier transform models showed improved trajectory prediction accuracy over a baseline dead reckoning model. Analysis of actual arrival traffic showed that this improved trajectory prediction accuracy leads to improved inter-arrival separation prediction accuracy for longer look ahead times. The difference in mean inter-arrival separation prediction error between the Fourier transform and dead reckoning models was 0.2 nmi for a look ahead time of 120 sec, a 33 percent improvement, with a corresponding 32 percent improvement in standard deviation.

  9. Operational constraints and hydrologic variability limit hydropower in supporting wind integration

    NASA Astrophysics Data System (ADS)

    Fernandez, Alisha R.; Blumsack, Seth A.; Reed, Patrick M.

    2013-06-01

    Climate change mitigation will require rapid adoption of low-carbon energy resources. The integration of large-scale wind energy in the United States (US) will require controllable assets to balance the variability of wind energy production. Previous work has identified hydropower as an advantageous asset, due to its flexibility and low-carbon emissions production. While many dams currently provide energy and environmental services in the US and globally, we find that multi-use hydropower facilities would face significant policy conflicts if asked to store and release water to accommodate wind integration. Specifically, we develop a model simulating hydroelectric operational decisions when the electric facility is able to provide wind integration services through a mechanism that we term ‘flex reserves’. We use Kerr Dam in North Carolina as a case study, simulating operations under two alternative reservoir policies, one reflecting current policies and the other regulating flow levels to promote downstream ecosystem conservation. Even under perfect information and significant pricing incentives, Kerr Dam faces operational conflicts when providing any substantial levels of flex reserves while also maintaining releases consistent with other river management requirements. These operational conflicts are severely exacerbated during periods of drought. Increase of payments for flex reserves does not resolve these operational and policy conflicts.

  10. Limited field investigation report for the 100-HR-3 operable unit

    SciTech Connect

    Not Available

    1994-09-01

    This limited field investigation (LFI) was conducted to assess the applicability of interim remedial measures (IRM) for reducing human health and environmental risks within the 100-HR-3 Groundwater Operable Unit. The 100-HR-3 Operable Unit is comprised of three subareas; the 100 D Area, the 100 H Area and those portions of the 600 Area between the two reactor areas. The operable unit is one of seven operable units associated with the 100 D and H Areas. Operable units 100-DR-1, 100-DR-2, 100-DR-3, 100-HR-1, 100-HR-2 and 100-IU-4 address contaminant sources while 100-HR-3 addresses contamination present in the underlying groundwater. The primary method of field investigation used during this LFI was the installation and sampling of monitoring wells. Samples were collected from the groundwater and soils, and submitted for laboratory analysis. Boreholes were surveyed for radiological contamination using downhole geophysical techniques to further delineate the locations and levels of contaminants. All samples were screened to ascertain the presence of volatile organic compounds and radionuclides. Analytical data were subjected to validation; all round one, two and three and a minimum of 10% of round four data associated with the LFI were validated. A screening method was used to identify contaminants of potential concern (COPC). This screening method eliminated from further consideration, constituents that were below background. Constituents which are considered non-toxic to humans were eliminated from the human health evaluation. Data consistency and blank contamination were also evaluated in the screening process. These COPC were then evaluated further in the qualitative risk assessment (QRA). A human health QRA was performed using conservative (maximum equilibrated contaminant levels from the LFI) analyses.

  11. Homogenization limit for a multiband effective mass model in heterostructures

    SciTech Connect

    Morandi, O.

    2014-06-15

    We study the homogenization limit of a multiband model that describes the quantum mechanical motion of an electron in a quasi-periodic crystal. In this approach, the distance among the atoms that constitute the material (lattice parameter) is considered a small quantity. Our model include the description of materials with variable chemical composition, intergrowth compounds, and heterostructures. We derive the effective multiband evolution system in the framework of the kp approach. We study the well posedness of the mathematical problem. We compare the effective mass model with the standard kp models for uniform and non-uniforms crystals. We show that in the limit of vanishing lattice parameter, the particle density obtained by the effective mass model, converges to the exact probability density of the particle.

  12. 40 CFR 63.9991 - What emission limitations, work practice standards, and operating limits must I meet?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... this subpart only if your EGU: (1) Has a system using wet or dry flue gas desulfurization technology... operate the wet or dry flue gas desulfurization technology installed on the unit consistent with §...

  13. 40 CFR 63.9991 - What emission limitations, work practice standards, and operating limits must I meet?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... this subpart only if your EGU: (1) Has a system using wet or dry flue gas desulfurization technology... operate the wet or dry flue gas desulfurization technology installed on the unit consistent with §...

  14. 40 CFR 63.9991 - What emission limitations, work practice standards, and operating limits must I meet?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... this subpart only if your EGU: (1) Has a system using wet or dry flue gas desulfurization technology... operate the wet or dry flue gas desulfurization technology installed on the unit consistent with §...

  15. 40 CFR 63.7500 - What emission limitations, work practice standards, and operating limits must I meet?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... that generate electricity. If you operate a new boiler or process heater, you can choose to comply with... designed to burn gas 2 (other) fuels subcategory or units designed to burn light liquid fuels...

  16. Globally nilpotent differential operators and the square Ising model

    NASA Astrophysics Data System (ADS)

    Bostan, A.; Boukraa, S.; Hassani, S.; Maillard, J.-M.; Weil, J.-A.; Zenine, N.

    2009-03-01

    We recall various multiple integrals with one parameter, related to the isotropic square Ising model, and corresponding, respectively, to the n-particle contributions of the magnetic susceptibility, to the (lattice) form factors, to the two-point correlation functions and to their λ-extensions. The univariate analytic functions defined by these integrals are holonomic and even G-functions: they satisfy Fuchsian linear differential equations with polynomial coefficients and have some arithmetic properties. We recall the explicit forms, found in previous work, of these Fuchsian equations, as well as their Russian-doll and direct sum structures. These differential operators are selected Fuchsian linear differential operators, and their remarkable properties have a deep geometrical origin: they are all globally nilpotent, or, sometimes, even have zero p-curvature. We also display miscellaneous examples of globally nilpotent operators emerging from enumerative combinatorics problems for which no integral representation is yet known. Focusing on the factorized parts of all these operators, we find out that the global nilpotence of the factors (resp. p-curvature nullity) corresponds to a set of selected structures of algebraic geometry: elliptic curves, modular curves, curves of genus five, six,..., and even a remarkable weight-1 modular form emerging in the three-particle contribution χ(3) of the magnetic susceptibility of the square Ising model. Noticeably, this associated weight-1 modular form is also seen in the factors of the differential operator for another n-fold integral of the Ising class, Φ(3)H, for the staircase polygons counting, and in Apéry's study of ζ(3). G-functions naturally occur as solutions of globally nilpotent operators. In the case where we do not have G-functions, but Hamburger functions (one irregular singularity at 0 or ∞) that correspond to the confluence of singularities in the scaling limit, the p-curvature is also found to verify new

  17. Limit of a nonpreferential attachment multitype network model

    NASA Astrophysics Data System (ADS)

    Shang, Yilun

    2017-02-01

    Here, we deal with a model of multitype network with nonpreferential attachment growth. The connection between two nodes depends asymmetrically on their types, reflecting the implication of time order in temporal networks. Based upon graph limit theory, we analytically determined the limit of the network model characterized by a kernel, in the sense that the number of copies of any fixed subgraph converges when network size tends to infinity. The results are confirmed by extensive simulations. Our work thus provides a theoretical framework for quantitatively understanding grown temporal complex networks as a whole.

  18. 40 CFR 63.5740 - What emission limit must I meet for carpet and fabric adhesive operations?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... carpet and fabric adhesive operations? 63.5740 Section 63.5740 Protection of Environment ENVIRONMENTAL... Boat Manufacturing Standards for Carpet and Fabric Adhesive Operations § 63.5740 What emission limit must I meet for carpet and fabric adhesive operations? (a) You must use carpet and fabric...

  19. 40 CFR 63.5740 - What emission limit must I meet for carpet and fabric adhesive operations?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... carpet and fabric adhesive operations? 63.5740 Section 63.5740 Protection of Environment ENVIRONMENTAL... Manufacturing Standards for Carpet and Fabric Adhesive Operations § 63.5740 What emission limit must I meet for carpet and fabric adhesive operations? (a) You must use carpet and fabric adhesives that contain no...

  20. 40 CFR 63.5740 - What emission limit must I meet for carpet and fabric adhesive operations?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... carpet and fabric adhesive operations? 63.5740 Section 63.5740 Protection of Environment ENVIRONMENTAL... Boat Manufacturing Standards for Carpet and Fabric Adhesive Operations § 63.5740 What emission limit must I meet for carpet and fabric adhesive operations? (a) You must use carpet and fabric...

  1. 40 CFR 63.5740 - What emission limit must I meet for carpet and fabric adhesive operations?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... carpet and fabric adhesive operations? 63.5740 Section 63.5740 Protection of Environment ENVIRONMENTAL... Manufacturing Standards for Carpet and Fabric Adhesive Operations § 63.5740 What emission limit must I meet for carpet and fabric adhesive operations? (a) You must use carpet and fabric adhesives that contain no...

  2. 40 CFR 63.5740 - What emission limit must I meet for carpet and fabric adhesive operations?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... carpet and fabric adhesive operations? 63.5740 Section 63.5740 Protection of Environment ENVIRONMENTAL... Boat Manufacturing Standards for Carpet and Fabric Adhesive Operations § 63.5740 What emission limit must I meet for carpet and fabric adhesive operations? (a) You must use carpet and fabric...

  3. Statistical analysis of synaptic transmission: model discrimination and confidence limits.

    PubMed Central

    Stricker, C; Redman, S; Daley, D

    1994-01-01

    Procedures for discriminating between competing statistical models of synaptic transmission, and for providing confidence limits on the parameters of these models, have been developed. These procedures were tested against simulated data and were used to analyze the fluctuations in synaptic currents evoked in hippocampal neurones. All models were fitted to data using the Expectation-Maximization algorithm and a maximum likelihood criterion. Competing models were evaluated using the log-likelihood ratio (Wilks statistic). When the competing models were not nested, Monte Carlo sampling of the model used as the null hypothesis (H0) provided density functions against which H0 and the alternate model (H1) were tested. The statistic for the log-likelihood ratio was determined from the fit of H0 and H1 to these probability densities. This statistic was used to determine the significance level at which H0 could be rejected for the original data. When the competing models were nested, log-likelihood ratios and the chi 2 statistic were used to determine the confidence level for rejection. Once the model that provided the best statistical fit to the data was identified, many estimates for the model parameters were calculated by resampling the original data. Bootstrap techniques were then used to obtain the confidence limits of these parameters. PMID:7948672

  4. CDX-U Operation with a Large Area Liquid Lithium Limiter

    SciTech Connect

    R. Majeski; M. Boaz; D. Hoffman; B. Jones; R. Kaita; H. Kugel; T. Munsat; J. Spaleta; V. Soukhanovskii; J. Timberlake; L. Zakharov; G. Antar; R. Doerner; S. Luckhardt; R.W. Conn; M. Finkenthal; D. Stutman; R. Maingi; and M. Ulrickson

    2002-07-12

    The Current Drive experiment-Upgrade (CDX-U) at the Princeton Plasma Physics Laboratory has begun experiments with a fully toroidal liquid lithium limiter. CDX-U is a compact [R = 34 cm, a = 22 cm, B(subscript)toroidal = 2 kG, I(subscript)P = 100 kA, T(subscript)e(0) {approx} 100 eV, n(subscript)e(0) {approx} 5 x 10{sup 19} m{sup -3}] short-pulse (<25 msec) spherical torus with extensive diagnostics. The limiter, which consists of a shallow circular stainless steel tray of radius 34 cm and width 10 cm, can be filled with lithium to a depth of a few millimeters, and forms the lower limiting surface for the discharge. Heating elements beneath the tray are used to liquefy the lithium prior to the experiment. Surface coatings are evident on part of the lithium. Despite the surface coatings, tokamak discharges operated in contact with the lithium-filled tray show evidence of reduced impurities and recycling. The reduction in recycling is largest when the lithium is liquefied by heating to 250 degrees Celsius.

  5. Robust Models for Operator Workload Estimation

    DTIC Science & Technology

    2015-03-01

    research attempts to infer operator workload from operator physiological data, such as electroencephalography (EEG) and electrocardiography (ECG). An......of the operators using two monitoring systems; the CleveMed BioRadio 150 and the Smart Eye Pro. The BioRadio received electroencephalography (EEG

  6. Modelling Limit Order Execution Times from Market Data

    NASA Astrophysics Data System (ADS)

    Kim, Adlar; Farmer, Doyne; Lo, Andrew

    2007-03-01

    Although the term ``liquidity'' is widely used in finance literatures, its meaning is very loosely defined and there is no quantitative measure for it. Generally, ``liquidity'' means an ability to quickly trade stocks without causing a significant impact on the stock price. From this definition, we identified two facets of liquidity -- 1.execution time of limit orders, and 2.price impact of market orders. The limit order is an order to transact a prespecified number of shares at a prespecified price, which will not cause an immediate execution. On the other hand, the market order is an order to transact a prespecified number of shares at a market price, which will cause an immediate execution, but are subject to price impact. Therefore, when the stock is liquid, market participants will experience quick limit order executions and small market order impacts. As a first step to understand market liquidity, we studied the facet of liquidity related to limit order executions -- execution times. In this talk, we propose a novel approach of modeling limit order execution times and show how they are affected by size and price of orders. We used q-Weibull distribution, which is a generalized form of Weibull distribution that can control the fatness of tail to model limit order execution times.

  7. 40 CFR Table 28 to Subpart Uuu of... - Continuous Compliance With Operating Limits for Inorganic HAP Emissions From Catalytic Reforming...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... HCl concentration below the applicable operating limit. 3. Internal scrubbing system meeting percent... exceed the design or manufacturer's recommended limit (1.35 weight percent for the Clorsorb TM Collecting... chloride concentration below the design or manufacturer's recommended limit (1.8 weight percent...

  8. 40 CFR Table 28 to Subpart Uuu of... - Continuous Compliance With Operating Limits for Inorganic HAP Emissions From Catalytic Reforming...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... HCl concentration below the applicable operating limit. 3. Internal scrubbing system meeting percent... exceed the design or manufacturer's recommended limit (1.35 weight percent for the Clorsorb TM Collecting... chloride concentration below the design or manufacturer's recommended limit (1.8 weight percent...

  9. Making sense of Arctic maritime traffic using the Polar Operational Limits Assessment Risk Indexing System (POLARIS)

    NASA Astrophysics Data System (ADS)

    Stoddard, M. A.; Etienne, L.; Fournier, M.; Pelot, R.; Beveridge, L.

    2016-04-01

    Maritime traffic volume in the Arctic is growing for several reasons: climate change is resulting in less ice in extent, duration, and thickness; economic drivers are inducing growth in resource extraction traffic, community size (affecting resupply) and adventure tourism. This dynamic situation, coupled with harsh weather, variable operating conditions, remoteness, and lack of straightforward emergency response options, demand robust risk management processes. The requirements for risk management for polar ship operations are specified in the new International Maritime Organization (IMO) International Code for Ships Operating in Polar Waters (Polar Code). The goal of the Polar Code is to provide for safe ship operations and protection of the polar environment by addressing the risk present in polar waters. Risk management is supported by evidence-based models, including threat identification (types and frequency of hazards), exposure levels, and receptor characterization. Most of the information used to perform risk management in polar waters is attained in-situ, but increasingly is being augmented with open-access remote sensing information. In this paper we focus on the use of open-access historical ice charts as an integral part of northern navigation, especially for route planning and evaluation.

  10. Usefulness and limitations of global flood risk models

    NASA Astrophysics Data System (ADS)

    Ward, Philip; Jongman, Brenden; Salamon, Peter; Simpson, Alanna; Bates, Paul; De Groeve, Tom; Muis, Sanne; Coughlan de Perez, Erin; Rudari, Roberto; Mark, Trigg; Winsemius, Hessel

    2016-04-01

    Global flood risk models are now a reality. Initially, their development was driven by a demand from users for first-order global assessments to identify risk hotspots. Relentless upward trends in flood damage over the last decade have enhanced interest in such assessments. The adoption of the Sendai Framework for Disaster Risk Reduction and the Warsaw International Mechanism for Loss and Damage Associated with Climate Change Impacts have made these efforts even more essential. As a result, global flood risk models are being used more and more in practice, by an increasingly large number of practitioners and decision-makers. However, they clearly have their limits compared to local models. To address these issues, a team of scientists and practitioners recently came together at the Global Flood Partnership meeting to critically assess the question 'What can('t) we do with global flood risk models?'. The results of this dialogue (Ward et al., 2013) will be presented, opening a discussion on similar broader initiatives at the science-policy interface in other natural hazards. In this contribution, examples are provided of successful applications of global flood risk models in practice (for example together with the World Bank, Red Cross, and UNISDR), and limitations and gaps between user 'wish-lists' and model capabilities are discussed. Finally, a research agenda is presented for addressing these limitations and reducing the gaps. Ward et al., 2015. Nature Climate Change, doi:10.1038/nclimate2742

  11. Strings as sigma models and in the tensionless limit

    NASA Astrophysics Data System (ADS)

    Persson, Jonas

    2007-05-01

    This thesis considers two different aspects of string theory, the tensionless limit of the string and supersymmetric sigma models. The tensionless limit is used to find a IIB supergravity background generated by a tensionless string. Quantization of the tensionless string in a pp-wave background is performed and the tensionless limit is found to commute with quantization. Further, the sigma model with N=(2,2) extended world-sheet supersymmetry is considered and the requirement on the target space to have a bi-Hermitean geometry is reviewed. It is shown that the equivalence between bi-Hermitean geometry and generalized Kahler follows, in this context, from the equivalence between the Lagrangian- and Hamiltonian formulation of the model. Moreover, the explicit T-duality transformation in the Hamiltonian formulation of the sigma model is constructed and shown to be a symplectomorphism. Under certain assumptions, the amount of extended supersymmetry present in the sigma model is shown to be preserved under T-duality. Further, by requiring N=(2,2) extended supersymmetry in a first order formulation of the sigma model an intriguing geometrical structure arises and in a special case generalized complex geometry is found to be contained in the new framework.

  12. 40 CFR 60.2145 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... NEW STATIONARY SOURCES Standards of Performance for Commercial and Industrial Solid Waste Incineration...(a)(2). Your source must remain in compliance with this subpart until the effective date of the waste...) The name of the owner or operator of the CISWI unit, the location of the source, the emissions...

  13. 40 CFR 60.2710 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... NEW STATIONARY SOURCES Emissions Guidelines and Compliance Times for Commercial and Industrial Solid...(a)(2). Your source must remain in compliance with this subpart until the effective date of the waste...) The name of the owner or operator of the CISWI unit, the location of the source, the emissions...

  14. 40 CFR 63.6640 - How do I demonstrate continuous compliance with the emission limitations and operating limitations?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines Continuous Compliance... of operation from engine startup (engine burn-in period) are not violations. Rebuilt stationary RICE... 4SLB engines greater than or equal to 250 and less than or equal to 500 brake HP), a new...

  15. 40 CFR 63.6640 - How do I demonstrate continuous compliance with the emission limitations, operating limitations...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines... that occur during the first 200 hours of operation from engine startup (engine burn-in period) are not... (except new or reconstructed 4SLB engines greater than or equal to 250 and less than or equal to 500...

  16. 40 CFR 63.6640 - How do I demonstrate continuous compliance with the emission limitations and operating limitations?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines Continuous Compliance... of operation from engine startup (engine burn-in period) are not violations. Rebuilt stationary RICE... 4SLB engines greater than or equal to 250 and less than or equal to 500 brake HP), a new...

  17. 40 CFR 63.6640 - How do I demonstrate continuous compliance with the emission limitations, operating limitations...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines... that occur during the first 200 hours of operation from engine startup (engine burn-in period) are not... (except new or reconstructed 4SLB engines greater than or equal to 250 and less than or equal to 500...

  18. 40 CFR 60.2932 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... must be conducted using the test methods listed in table 1 of this subpart and the procedures in 60... NEW STATIONARY SOURCES Operator Training and Qualification Continuous Compliance Requirements § 60...? (a) You must conduct an annual performance test for all of the pollutants in table 1 of this...

  19. 40 CFR 60.2932 - How do I demonstrate continuous compliance with the emission limitations and the operating limits?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... must be conducted using the test methods listed in table 1 of this subpart and the procedures in 60... NEW STATIONARY SOURCES Operator Training and Qualification Continuous Compliance Requirements § 60...? (a) You must conduct an annual performance test for all of the pollutants in table 1 of this...

  20. 40 CFR Table 4 to Subpart Vvvv of... - Operating Limits if Using an Add-on Control Device for Open Molding Operations

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 13 2012-07-01 2012-07-01 false Operating Limits if Using an Add-on... Limits if Using an Add-on Control Device for Open Molding Operations As specified in §§ 63.5715(a) and 63... device and add-on control device inlet in any 3-hour period must not fall below the average...

  1. Model-based condition monitoring of PEM fuel cell using Hotelling T 2 control limit

    NASA Astrophysics Data System (ADS)

    Xue, X.; Tang, J.; Sammes, N.; Ding, Y.

    Although a variety of design and control strategies have been proposed to improve the performance of polymer electrolyte membrane (PEM) fuel cell systems, temporary faults in such systems still might occur during operations due to the complexity of the physical process and the functional limitations of some components. The development of an effective condition monitoring system that can detect these faults in a timely manner is complicated by the operating condition variation, the significant variability/uncertainty of the fuel cell system, and the measurement noise. In this research, we propose a model-based condition monitoring scheme that employs the Hotelling T 2 statistical analysis for fault detection of PEM fuel cells. Under a given operating condition, the instantaneous load current, the temperature and fuel/gas source pressures of the fuel cell are measured. These measurements are then fed into a lumped parameter dynamic fuel cell model for the establishment of the baseline under the same operating condition for comparison. The fuel cell operation is simulated under statistical sampling of parametric uncertainties with specified statistics (mean and variance) that account for the system variability/uncertainty and measurement noise. This yields a group of output voltages (under the same operating condition but with uncertainties) as the baseline. Fault detection is facilitated by comparing the real-time measurement of the fuel cell output voltage with the baseline voltages by employing the Hotelling T 2 statistical analysis. The baseline voltages are used to evaluate the output T 2 statistics under normal operating condition. Then, with a given confidence level the upper control limit can be specified. Fault condition will be declared if the T 2 statistics of real-time voltage measurement exceeds the upper control limit. This model-based robust condition monitoring scheme can deal with the operating condition variation, various uncertainties in a fuel cell

  2. 40 CFR 60.5180 - Do the emission limits, emission standards, and operating limits apply during periods of startup...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... less than the sewage sludge incineration residence time). For determining compliance with the CO concentration limit using CO CEMS, the correction to 7 percent oxygen does not apply during periods of startup or shutdown. Use the measured CO concentration without correcting for oxygen concentration...

  3. 40 CFR 60.5180 - Do the emission limits, emission standards, and operating limits apply during periods of startup...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... less than the sewage sludge incineration residence time). For determining compliance with the CO concentration limit using CO CEMS, the correction to 7 percent oxygen does not apply during periods of startup or shutdown. Use the measured CO concentration without correcting for oxygen concentration...

  4. 40 CFR 60.5180 - Do the emission limits, emission standards, and operating limits apply during periods of startup...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... less than the sewage sludge incineration residence time). For determining compliance with the CO concentration limit using CO CEMS, the correction to 7 percent oxygen does not apply during periods of startup or shutdown. Use the measured CO concentration without correcting for oxygen concentration...

  5. 40 CFR Table 23 to Subpart Uuu of... - Operating Limits for Inorganic HAP Emission Limitations for Catalytic Reforming Units

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... established during the performance test. 2. Internal scrubbing system or no control device (e.g., hot regen... scrubbing liquid) exiting the internal scrubbing system must not fall below the limit established during the... existing catalytic reforming unit with this type of control device . . . You shall meet this...

  6. 40 CFR 63.2378 - How do I demonstrate continuous compliance with the emission limitations, operating limits, and...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... elect to route emissions from storage tanks or transfer racks to a fuel gas system or to a process, as... limited to, air pollution control technologies, recovery technologies, work practices, pollution... control device used to control storage tanks or transfer racks, during which the control device does...

  7. 40 CFR 60.5180 - Do the emission limits, emission standards, and operating limits apply during periods of startup...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... less than the sewage sludge incineration residence time). For determining compliance with the CO concentration limit using CO CEMS, the correction to 7 percent oxygen does not apply during periods of startup or shutdown. Use the measured CO concentration without correcting for oxygen concentration...

  8. 40 CFR 63.6630 - How do I demonstrate initial compliance with the emission limitations, operating limitations, and...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... formaldehyde emission limit by testing for THC instead of formaldehyde. The testing must be conducted according to the requirements in Table 4 of this subpart. The average reduction of emissions of THC determined... subpart, or using appendix A to this subpart. (4) If you are demonstrating compliance with the THC...

  9. 40 CFR 63.6630 - How do I demonstrate initial compliance with the emission limitations, operating limitations, and...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... formaldehyde emission limit by testing for THC instead of formaldehyde. The testing must be conducted according to the requirements in Table 4 of this subpart. The average reduction of emissions of THC determined... subpart, or using appendix A to this subpart. (4) If you are demonstrating compliance with the THC...

  10. A linear control design structure to maintain loop properties during limit operation in a multi-nozzle turbofan engine

    NASA Technical Reports Server (NTRS)

    Mattern, Duane; Ouzts, Peter

    1991-01-01

    The implementation of multi-variable control systems on turbofan engines requires the use of limit protection to maintain safe engine operation. Since a turbofan engine typically encounters limits during transient operation, the use of a limit protection scheme that modifies the feedback loop may void the desired 'guarantees' associated with linear multi-variable control design methods, necessitating considerable simulation to validate the control with limit protection. An alternative control design structure is proposed that maintains the desired linear feedback properties when certain safety limits are encountered by moving the limit protection scheme outside of the feedback loop. This proposed structure is compared to a structure with a limit protection scheme that modifies the feedback loop properties. The two design structures are compared using both linear and nonlinear simulations. The evaluation emphasizes responses where the fan surge margin limit is encountered.

  11. A linear control design structure to maintain loop properties during limit operation in a multi-nozzle turbofan engine

    NASA Technical Reports Server (NTRS)

    Mattern, Duane; Ouzts, Peter

    1991-01-01

    The implementation of multi-variable control systems on turbofan engines requires the use of limit protection to maintain safe engine operation. Since a turbofan engine typically encounters limits during transient operation, the use of a limit protection scheme that modifies the feedback loop may void the desired 'guarantees' associated with linear multi-variable control design methods, necessitating considerable simulation to validate the control with limited protection. An alternative control design structure is proposed that maintains the desired linear feedback properties when certain safety limits are encountered by moving the limit protection scheme outside the feedback loop. This proposed structure is compared to a structure with a limit protection scheme that modifies the feedback loop properties. The two design structures are compared using both linear and nonlinear simulations. The evaluation emphasizes responses where the fan surge margin limit is encountered.

  12. Methods to Assess Bioavailability of Hydrophobic Organic Contaminants: Principles, Operations, and Limitations

    PubMed Central

    Cui, Xinyi; Mayer, Philipp; Gan, Jay

    2013-01-01

    Many important environmental contaminants are hydrophobic organic contaminants (HOCs), which include PCBs, PAHs, PBDEs, DDT and other chlorinated insecticides, among others. Owing to their strong hydrophobicity, HOCs have their final destination in soil or sediment, where their ecotoxicological effects are closely regulated by sorption and thus bioavailability. The last two decades has seen a dramatic increase in research efforts in developing and applying partitioning based methods and biomimetic extractions for measuring HOC bioavailability. However, the many variations of both analytical methods and associated measurement endpoints are often a source of confusion for users. In this review, we distinguish the most commonly used analytical approaches based on their measurement objectives, and illustrate their practical operational steps, strengths and limitations using simple flowcharts. This review may serve as guidance for new users on the selection and use of established methods, and a reference for experienced investigators to identify potential topics for further research. PMID:23064200

  13. Quantum-limited operation of balanced mixer homodyne and heterodyne receivers

    NASA Astrophysics Data System (ADS)

    Machida, Susumu; Yamamoto, Yoshihisa

    1986-05-01

    In the GaAs semiconductor laser balanced mixer heterodyne receiver of Abbas and Chan (1983), the photocurrent fluctuation due to local oscillator wave intensity noise was suppressed, but the absolute quantum noise level calibration was not clarified. In this paper, the results of experimental calibration of the quantum noise level were obtained using two different methods: photocurrent spectral density measurement and photoelectron counting. The noise of a balanced mixer operation was confirmed to be truly quantum limited; the photocurrent fluctuation spectral density measured with a spectrum analyzer agreed with the quantum noise spectral density. The deviations from the absolute quantum noise level were within + or -0.02 dB. Complete suppression of local oscillator excess noise was demonstrated in the 0-1.5 GHz frequency region. Uses of balanced mixers for observing the squeezing phenomenon and quantum nondemolition measurement is mentioned.

  14. The Thermodynamic Limit in Mean Field Spin Glass Models

    NASA Astrophysics Data System (ADS)

    Guerra, Francesco; Toninelli, Fabio Lucio

    We present a simple strategy in order to show the existence and uniqueness of the infinite volume limit of thermodynamic quantities, for a large class of mean field disordered models, as for example the Sherrington-Kirkpatrick model, and the Derrida p-spin model. The main argument is based on a smooth interpolation between a large system, made of N spin sites, and two similar but independent subsystems, made of N1 and N2 sites, respectively, with N1+N2=N. The quenched average of the free energy turns out to be subadditive with respect to the size of the system. This gives immediately convergence of the free energy per site, in the infinite volume limit. Moreover, a simple argument, based on concentration of measure, gives the almost sure convergence, with respect to the external noise. Similar results hold also for the ground state energy per site.

  15. Mouse models of otitis media: strengths and limitations.

    PubMed

    Bhutta, Mahmood Fazal

    2012-10-01

    There has been a rapid rise in the use of the mouse to investigate pathobiology of otitis media. This is for good reason, including easy husbandry, but also capacity for genetic manipulation of the mouse. Insights into human disease have been gleaned from mouse models, but there are limitations of the mouse-to-man approach. First, important differences exist between mouse and man, particularly in immune function. Second, functional equivalence of genes in the 2 species is not ensured. Third, laboratory mice of a uniform genetic background and environment are an inadequate model of the plethora of factors affecting complex disease in humans. Finally, gene function in mouse models is often obliterated using gene knockout technology, but this is a poor mimic of normal gene variation in man. These drawbacks of the mouse may in the future limit its usefulness in otitis media research.

  16. Modeling of transient heat pipe operation

    NASA Technical Reports Server (NTRS)

    Colwell, G. T.; Hartley, J. G.

    1985-01-01

    The overall goal is to gain a better understanding of the transient behavior of heat pipes operating under both normal and adverse conditions. Normal operation refers to cases where the capillary structure remains fully wetted. Adverse operation occurs when drying, re-wetting, choking, noncontinuum flow, freezing, thawing etc., occur within the heat pipe. The work was redirected towards developing the capability to predict operational behavior of liquid metal heat pipes used for cooling aerodynamic structures. Of particular interest is the startup of such heat pipes from an initially frozen state such as might occur during re-entry of a space vehicle into the Earth's atmosphere or during flight of hypersonic aircraft.

  17. Modeling and simulation for space medicine operations: preliminary requirements considered

    NASA Technical Reports Server (NTRS)

    Dawson, D. L.; Billica, R. D.; McDonald, P. V.

    2001-01-01

    The NASA Space Medicine program is now developing plans for more extensive use of high-fidelity medical simulation systems. The use of simulation is seen as means to more effectively use the limited time available for astronaut medical training. Training systems should be adaptable for use in a variety of training environments, including classrooms or laboratories, space vehicle mockups, analog environments, and in microgravity. Modeling and simulation can also provide the space medicine development program a mechanism for evaluation of other medical technologies under operationally realistic conditions. Systems and procedures need preflight verification with ground-based testing. Traditionally, component testing has been accomplished, but practical means for "human in the loop" verification of patient care systems have been lacking. Medical modeling and simulation technology offer potential means to accomplish such validation work. Initial considerations in the development of functional requirements and design standards for simulation systems for space medicine are discussed.

  18. Operational limits on WEST inertial divertor sector during the early phase experiment

    NASA Astrophysics Data System (ADS)

    Firdaouss, M.; Corre, Y.; Languille, P.; Greuner, H.; Autissier, E.; Desgranges, C.; Guilhem, D.; Gunn, J. P.; Lipa, M.; Missirlian, M.; Pascal, J.-Y.; Pocheau, C.; Richou, M.; Tsitrone, E.

    2016-02-01

    The primary goal of the WEST project is to be a test bed to characterize the fatigue and lifetime of ITER-like W divertor components subjected to relevant thermal loads. During the first phase of exploitation (S2 2016), these components (W monoblock plasma facing unit—W-PFU) will be installed in conjunction with graphite components (G-PFU). Since the G-PFU will not be actively cooled, it is necessary to ensure the expected pulse duration allows the W-PFU to reach its steady state without overheating the G-PFU assembly structure or the embedded stainless-steel diagnostics. High heat flux tests were performed at the GLADIS facility to assess the thermal behavior of the G-PFU. Some operational limits based on plasma parameters were determined. It was found that it is possible to operate at an injected power such that the maximal incident heat flux on the lower divertor is 10 MW m-2 for the required pulse length.

  19. Development of the VOLT-A Shuttle experiment. [Volt Operating Limit Tests

    NASA Technical Reports Server (NTRS)

    Bifano, William J.; Bozek, John M.; Ferguson, Dale C.

    1985-01-01

    The NASA Lewis Research Center (LeRC) is investigating potential problems associated with the operation of high voltage solar cell arrays in the space plasma environment. At high voltages, interactions between the solar array and the space plasma could result in unacceptable levels of electrical discharge (arcing) and/or parasitic losses (current drains from the array to the plasma). The objective of the Voltage Operating Limit Tests (VOLT-A) Shuttle bay experiment is to characterize space plasma/solar cell panel interactions in low earth orbit. VOLT-A consists of an experiment plate subassembly which contains four solar panels, an electronics subassembly and a Langmuir probe subassembly mounted on an MPESS carrier. During a given 8.25 hour data taking period (5-1/2 continuous orbits), the solar panels, which represent state-of-the-art solar cell technologies, will be sequentially subjected to bias voltages in steps ranging from minus 626 V to plus 313 V. Appropriate measurements will be made at each voltage to characterize arcing and parasitic losses. Corresponding measurements of the plasma environment (plasma density, electron temperature and neutral density) will also be made. Data will be recorded on an on-board tape recorder for subsequent data reduction and analysis.

  20. Analysis of MHD instabilities limiting high normalized beta operation in KSTAR

    NASA Astrophysics Data System (ADS)

    Park, Y. S.; Sabbagh, S. A.; Berkery, J. W.; Bialek, J. M.; Yoon, S. W.; Kim, J.; Jeon, Y. M.; Bak, J. G.; Ko, W. H.; Hahn, S. H.; in, Y. K.; Choi, M. J.; Lee, S. G.; Kwak, J. G.; Oh, Y. K.; Park, H. K.; Yun, G. S.; Jardin, S. C.

    2016-10-01

    H-mode plasma operation in KSTAR reached high normalized beta up to 4.3 that significantly surpassed the computed n = 1 ideal no-wall beta limit by a factor of 1.6. Pulse lengths at maximum normalized beta were extended to longer pulses by new, more rapid equilibrium control resulting in normalized beta greater than 3 sustained for 1 s. Analysis of these plasmas shows that low- n global kink/ballooning or resistive wall modes (RWMs) were not the cause of the plasma termination. Kinetic modification of the ideal MHD n = 1 stability criterion computed by the MISK code shows the kinetic RWM to be stable, which is consistent with the observed high normalized beta operation. An m/ n = 2/1 tearing mode onsets at high normalized beta greater than 3 that experimentally reduces normalized beta by more than 30%. The stability of the observed 2/1 tearing mode examined by using the M3D-C1 code coupled with the EFIT reconstruction shows a stable 2/1 mode while the equilibrium is experimentally unstable to the 2/1 mode This result may imply that the mode is classically stable, and the pressuredriven neoclassical terms dominate over the current gradient term. Advances in the analysis from the recent run campaign will be reported. Supported by U.S. DOE Grant DE-FG02-99ER54524.

  1. Drosophila models of Alzheimer's disease: advances, limits, and perspectives.

    PubMed

    Bouleau, Sylvina; Tricoire, Hervé

    2015-01-01

    Amyloid-β protein precursor (AβPP) and the microtubule-associated protein tau (MAPT) are the two key players involved in Alzheimer's disease (AD) and are associated with amyloid plaques and neurofibrillary tangles respectively, two key hallmarks of the disease. Besides vertebrate models, Drosophila models have been widely used to understand the complex events leading to AD in relation to aging. Drosophila benefits from the low redundancy of the genome which greatly simplifies the analysis of single gene disruption, sophisticated molecular genetic tools, and reduced cost compared to mammals. The aim of this review is to describe the recent advances in modeling AD using fly and to emphasize some limits of these models. Genetic studies in Drosophila have revealed some key aspects of the normal function of Appl and Tau, the fly homologues of AβPP and MAPT that may be disrupted during AD. Drosophila models have also been useful to uncover or validate several pathological pathways or susceptibility genes, and have been readily implemented in drug screening pipelines. We discuss some limitations of the current models that may arise from differences in structure of Appl and Tau compared to their human counterparts or from missing AβPP or MAPT protein interactors in flies. The advent of new genome modification technologies should allow the development of more realistic fly models and to better understand the relationship between AD and aging, taking advantage of the fly's short lifespan.

  2. 14 CFR Special Federal Aviation... - Operating Limitations for Unscheduled Operations at Chicago's O'Hare International Airport

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Operations at Chicago's O'Hare International Airport Federal Special Federal Aviation Regulation No. 105 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Pt. 93, SFAR No. 105 Special Federal...

  3. 40 CFR 63.4292 - What operating limits must I meet?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) National Emission Standards for Hazardous Air Pollutants: Printing, Coating, and Dyeing of Fabrics and.../printing operation, slashing operation, or dyeing/finishing operation on which you use the compliant material option; web coating/printing operation or dyeing/finishing operation on which you use the...

  4. 40 CFR 63.4292 - What operating limits must I meet?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) National Emission Standards for Hazardous Air Pollutants: Printing, Coating, and Dyeing of Fabrics and.../printing operation, slashing operation, or dyeing/finishing operation on which you use the compliant material option; web coating/printing operation or dyeing/finishing operation on which you use the...

  5. 40 CFR 63.4292 - What operating limits must I meet?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) National Emission Standards for Hazardous Air Pollutants: Printing, Coating, and Dyeing of Fabrics and.../printing operation, slashing operation, or dyeing/finishing operation on which you use the compliant material option; web coating/printing operation or dyeing/finishing operation on which you use the...

  6. 76 FR 19517 - Orders Limiting Scheduled Operations at John F. Kennedy International Airport, LaGuardia Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-07

    ... Airport, LaGuardia Airport, and Newark Liberty International Airport; High Density Rule at Reagan National.... FAA Analysis Under the FAA's High Density Rule and Orders limiting scheduled operations at LGA,...

  7. Criterion of the boundedness of a fractional integration type operator with variable upper limit in weighted Lebesgue spaces

    NASA Astrophysics Data System (ADS)

    Abylayeva, Akbota

    2016-08-01

    In this paper, the necessary and sufficient conditions of the boundedness of a fractional integration type operator with variable upper limit are obtained under different parameters in weighted Lebesgue spaces.

  8. Limits on the Power of Some Models of Quantum Computation

    NASA Astrophysics Data System (ADS)

    Ortiz, Gerardo; Somma, Rolando; Barnum, Howard; Knill, Emanuel

    2006-09-01

    We consider quantum computational models defined via a Lie-algebraic theory. In these models, specified initial states are acted on by Lie-algebraic quantum gates and the expectation values of Lie algebra elements are measured at the end. We show that these models can be efficiently simulated on a classical computer in time polynomial in the dimension of the algebra, regardless of the dimension of the Hilbert space where the algebra acts. Similar results hold for the computation of the expectation value of operators implemented by a gate-sequence. We introduce a Lie-algebraic notion of generalized mean-field Hamiltonians and show that they are efficiently (exactly) solvable by means of a Jacobi-like diagonalization method. Our results generalize earlier ones on fermionic linear optics computation and provide insight into the source of the power of the conventional model of quantum computation.

  9. Limits on the Power of Some Models of Quantum Computation

    NASA Astrophysics Data System (ADS)

    Ortiz, Gerardo; Somma, Rolando; Barnum, Howard; Knill, Emanuel

    We consider quantum computational models defined via a Lie-algebraic theory. In these models, specified initial states are acted on by Lie-algebraic quantum gates and the expectation values of Lie algebra elements are measured at the end. We show that these models can be efficiently simulated on a classical computer in time polynomial in the dimension of the algebra, regardless of the dimension of the Hilbert space where the algebra acts. Similar results hold for the computation of the expectation value of operators implemented by a gate-sequence. We introduce a Lie-algebraic notion of generalized mean-field Hamiltonians and show that they are efficiently (exactly) solvable by means of a Jacobi-like diagonalization method. Our results generalize earlier ones on fermionic linear optics computation and provide insight into the source of the power of the conventional model of quantum computation.

  10. Exposure-Based Cat Modeling, Available data, Advantages, & Limitations

    NASA Astrophysics Data System (ADS)

    Michel, Gero; Hosoe, Taro; Schrah, Mike; Saito, Keiko

    2010-05-01

    This paper discusses the advantages and disadvantages of exposure data for cat-modeling and considers concepts of scale as well as the completeness of data and data scoring using field/model examples. Catastrophe modeling based on exposure data has been considered the panacea for insurance-related cat modeling since the late 1980's. Reasons for this include: • The ability to extend risk modeling to consider data beyond historical losses, • Usability across many relevant scales, • Flexibility in addressing complex structures and policy conditions, and • Ability to assess dependence of risk results on exposure-attributes and exposure-modifiers, such as lines of business, occupancy types, and mitigation features, at any given scale. In order to calculate related risk, monetary exposure is correlated to vulnerabilities that have been calibrated with historical results, plausibility concepts, and/or physical modeling. While exposure based modeling is widely adopted, we also need to be aware of its limitations which include: • Boundaries in our understanding of the distribution of exposure, • Spatial interdependence of exposure patterns and the time-dependence of exposure, • Incomplete availability of loss information to calibrate relevant exposure attributes/structure with related vulnerabilities and losses, • The scale-dependence of vulnerability, • Potential for missing or incomplete communication of assumptions made during model calibration, • Inefficiencies in the aggregation or disaggregation of vulnerabilities, and • Factors which can influence losses other than exposure, vulnerability, and hazard. Although we might assume that the higher the resolution the better, regional model calibration is often limited to lower than street level resolution with higher resolution being achieved by disaggregating results using topographic/roughness features with often loosely constrained and/or varying effects on losses. This suggests that higher accuracy

  11. Operational Limitations of the High Rate Frame Multiplexer (HRFM) Onboard the International Space Station(ISS)-and How These Limitations Affect Payload Developers (PDs) and International Partners (IPs)

    NASA Technical Reports Server (NTRS)

    Mixson, Charles D.; McElyea, Richard M. (Technical Monitor)

    2002-01-01

    The data system onboard the United States Operating Segment (USOS) of the ISS is currently used to capture, route, record and downlink high-rate science data from experiments inside the US Lab. Once NASDA's Japanese Experiment Module (JEM) and ESA's Attached Pressurized Module (APM) are launched - in the 2004 to 2005 timeframe - data from these facilities will also be routed to the ground using the USOS data system. A critical component of the USOS data system is the High Rate Frame Multiplexer (HRFM). The HRFM combines multiple data/video inputs and combines them into one data stream. This Ku-band data stream is then routed through the Tracking and Data Relay Satellite (TDRS) system to the ground. The Data Management Coordinator (DMC) - located at the Marshall Space Flight Center's Payload Operations Center (POC) - is responsible for commanding and controlling the HRFM. The HRFM can multiplex a maximum of eight digital data sources and four digital video sources. Thus far, this limitation has not been constraining to operations. However, once the JEM and APM are integrated, the HRFM limitations will become a major constraint to science operations onboard. The purpose of this paper is to characterize the limitations of the HRFM and to explain how these limitations can be successfully managed. With this information, Payload Developers and International Partners will be able to more effectively utilize the data systems onboard the ISS. Ultimately, more science data can be captured and downlinked to Flight Controllers and Scientists on the ground.

  12. Modeling the performance limits of novel microcantilever heaters for volatile organic compound detection

    NASA Astrophysics Data System (ADS)

    Jahangir, Ifat; Koley, Goutam

    2017-01-01

    We present a theoretical model estimating the performance limits of novel AlGaN/GaN heterostructure based microcantilever heater sensors to perform advanced volatile organic compound (VOC) detection and mixture analysis. Operating without any specific surface functionalization or treatment; these devices utilize the strong surface polarization of AlGaN as well as the unique device geometries, to perform selective detection of analytes based on their latent heat of evaporation and molecular dipole moment over a wide concentration range. The presented model incorporates heat transfer, Joule heating, thermal expansion and evaporative heat loss mechanisms, to predict device behaviors such as temperature profiles and sensing performance limits under various steady-state and transient test conditions. In addition, the versatility of the proposed model enables us to successfully predict the capability of the device to perform mixture analysis, and provides guidelines to further optimize the device properties to achieve a limit of detection in sub-ppm concentration.

  13. Torque limit of PM motors for field-weakening region operation

    SciTech Connect

    Royak, Semyon; Harbaugh, Mark M

    2012-02-14

    The invention includes a motor controller and technique for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by receiving a torque command, determining a physical torque limit based on a stator frequency, determining a theoretical torque limit based on a maximum available voltage and motor inductance ratio, and limiting the torque command to the smaller of the physical torque limit and the theoretical torque limit. Receiving the torque command may include normalizing the torque command to obtain a normalized torque command, determining the physical torque limit may include determining a normalized physical torque limit, determining a theoretical torque limit may include determining a normalized theoretical torque limit, and limiting the torque command may include limiting the normalized torque command to the smaller of the normalized physical torque limit and the normalized theoretical torque limit.

  14. Rodent models of diabetic nephropathy: their utility and limitations

    PubMed Central

    Kitada, Munehiro; Ogura, Yoshio; Koya, Daisuke

    2016-01-01

    Diabetic nephropathy is the most common cause of end-stage renal disease. Therefore, novel therapies for the suppression of diabetic nephropathy must be developed. Rodent models are useful for elucidating the pathogenesis of diseases and testing novel therapies, and many type 1 and type 2 diabetic rodent models have been established for the study of diabetes and diabetic complications. Streptozotocin (STZ)-induced diabetic animals are widely used as a model of type 1 diabetes. Akita diabetic mice that have an Ins2+/C96Y mutation and OVE26 mice that overexpress calmodulin in pancreatic β-cells serve as a genetic model of type 1 diabetes. In addition, db/db mice, KK-Ay mice, Zucker diabetic fatty rats, Wistar fatty rats, Otsuka Long-Evans Tokushima Fatty rats and Goto-Kakizaki rats serve as rodent models of type 2 diabetes. An animal model of diabetic nephropathy should exhibit progressive albuminuria and a decrease in renal function, as well as the characteristic histological changes in the glomeruli and the tubulointerstitial lesions that are observed in cases of human diabetic nephropathy. A rodent model that strongly exhibits all these features of human diabetic nephropathy has not yet been developed. However, the currently available rodent models of diabetes can be useful in the study of diabetic nephropathy by increasing our understanding of the features of each diabetic rodent model. Furthermore, the genetic background and strain of each mouse model result in differences in susceptibility to diabetic nephropathy with albuminuria and the development of glomerular and tubulointerstitial lesions. Therefore, the validation of an animal model reproducing human diabetic nephropathy will significantly facilitate our understanding of the underlying genetic mechanisms that contribute to the development of diabetic nephropathy. In this review, we focus on rodent models of diabetes and discuss the utility and limitations of these models for the study of diabetic

  15. Rodent models of diabetic nephropathy: their utility and limitations.

    PubMed

    Kitada, Munehiro; Ogura, Yoshio; Koya, Daisuke

    2016-01-01

    Diabetic nephropathy is the most common cause of end-stage renal disease. Therefore, novel therapies for the suppression of diabetic nephropathy must be developed. Rodent models are useful for elucidating the pathogenesis of diseases and testing novel therapies, and many type 1 and type 2 diabetic rodent models have been established for the study of diabetes and diabetic complications. Streptozotocin (STZ)-induced diabetic animals are widely used as a model of type 1 diabetes. Akita diabetic mice that have an Ins2+/C96Y mutation and OVE26 mice that overexpress calmodulin in pancreatic β-cells serve as a genetic model of type 1 diabetes. In addition, db/db mice, KK-Ay mice, Zucker diabetic fatty rats, Wistar fatty rats, Otsuka Long-Evans Tokushima Fatty rats and Goto-Kakizaki rats serve as rodent models of type 2 diabetes. An animal model of diabetic nephropathy should exhibit progressive albuminuria and a decrease in renal function, as well as the characteristic histological changes in the glomeruli and the tubulointerstitial lesions that are observed in cases of human diabetic nephropathy. A rodent model that strongly exhibits all these features of human diabetic nephropathy has not yet been developed. However, the currently available rodent models of diabetes can be useful in the study of diabetic nephropathy by increasing our understanding of the features of each diabetic rodent model. Furthermore, the genetic background and strain of each mouse model result in differences in susceptibility to diabetic nephropathy with albuminuria and the development of glomerular and tubulointerstitial lesions. Therefore, the validation of an animal model reproducing human diabetic nephropathy will significantly facilitate our understanding of the underlying genetic mechanisms that contribute to the development of diabetic nephropathy. In this review, we focus on rodent models of diabetes and discuss the utility and limitations of these models for the study of diabetic

  16. Two-phase-flow models and their limitations

    SciTech Connect

    Ishii, M.; Kocamustafaogullari, G.

    1982-01-01

    An accurate prediction of transient two-phase flow is essential to safety analyses of nuclear reactors under accident conditions. The fluid flow and heat transfer encountered are often extremely complex due to the reactor geometry and occurrence of transient two-phase flow. Recently considerable progresses in understanding and predicting these phenomena have been made by a combination of rigorous model development, advanced computational techniques, and a number of small and large scale supporting experiments. In view of their essential importance, the foundation of various two-phase-flow models and their limitations are discussed in this paper.

  17. Use of Adaptive Injection Strategies to Increase the Full Load Limit of RCCI Operation

    SciTech Connect

    Hanson, Reed; Ickes, Andrew; Wallner, Thomas

    2015-01-01

    Dual-fuel combustion using port-injection of low reactivity fuel combined with direct injection of a higher reactivity fuel, otherwise known as Reactivity Controlled Compression Ignition (RCCI), has been shown as a method to achieve low-temperature combustion with moderate peak pressure rise rates, low engine-out soot and NOx emissions, and high indicated thermal efficiency. A key requirement for extending to high-load operation is moderating the reactivity of the premixed charge prior to the diesel injection. One way to accomplish this is to use a very low reactivity fuel such as natural gas. In this work, experimental testing was conducted on a 13L multi-cylinder heavy-duty diesel engine modified to operate using RCCI combustion with port injection of natural gas and direct injection of diesel fuel. Engine testing was conducted at an engine speed of 1200 RPM over a wide variety of loads and injection conditions. The impact on dual-fuel engine performance and emissions with respect to varying the fuel injection parameters is quantified within this study. The injection strategies used in the work were found to affect the combustion process in similar ways to both conventional diesel combustion and RCCI combustion for phasing control and emissions performance. As the load is increased, the port fuel injection quantity was reduced to keep peak cylinder pressure and maximum pressure rise rate under the imposed limits. Overall, the peak load using the new injection strategy was shown to reach 22 bar BMEP with a peak brake thermal efficiency of 47.6%.

  18. Use of Adaptive Injection Strategies to Increase the Full Load Limit of RCCI Operation

    SciTech Connect

    Hanson, Reed; Ickes, Andrew; Wallner, Thomas

    2016-04-12

    Dual-fuel combustion using port-injection of low reactivity fuel combined with direct injection (DI) of a higher reactivity fuel, otherwise known as reactivity controlled compression ignition (RCCI), has been shown as a method to achieve low-temperature combustion with moderate peak pressure rise rates, low engine-out soot and NOx emissions, and high indicated thermal efficiency. A key requirement for extending to high-load operation is moderating the reactivity of the premixed charge prior to the diesel injection. One way to accomplish this is to use a very low reactivity fuel such as natural gas. In this work, experimental testing was conducted on a 13 l multicylinder heavy-duty diesel engine modified to operate using RCCI combustion with port injection of natural gas and DI of diesel fuel. Engine testing was conducted at an engine speed of 1200 rpm over a wide variety of loads and injection conditions. The impact on dual-fuel engine performance and emissions with respect to varying the fuel injection parameters is quantified within this study. The injection strategies used in the work were found to affect the combustion process in similar ways to both conventional diesel combustion (CDC) and RCCI combustion for phasing control and emissions performance. As the load is increased, the port fuel injection (PFI) quantity was reduced to keep peak cylinder pressure (PCP) and maximum pressure rise rate (MPRR) under the imposed limits. Overall, the peak load using the new injection strategy was shown to reach 22 bar brake mean effective pressure (BMEP) with a peak brake thermal efficiency (BTE) of 47.6%.

  19. Sleeve gastrectomy as a single-stage bariatric operation: indications and limitations.

    PubMed

    Daskalakis, Markos; Weiner, Rudolf A

    2009-01-01

    Sleeve gastrectomy (SG) was initially described as a first-step procedure followed by either biliopancreatic diversion with duodenal switch or Roux-en-Y gastric bypass in super-super obese patients. Multiple recent reports have documented SG as single therapy in the treatment of morbid obesity. However,the indications for this procedure are still under evaluation.Accumulating data demonstrate that SG can be an effective and safe procedure for super-super-obese or high-risk patients either as a single operation or as a bridge to more definitive surgery. SG can also be performed in patients who require anti-inflammatory medication or in patients with conditions such as Crohn's disease, cirrhosis, anemia, or severe osteoporosis which preclude intestinal bypass. Furthermore,SG represents not only a safe alternative for morbidly obese patients on anticoagulant medication or immunosuppressive agents but also for those with multiple intra-abdominal adhesions or after failed gastric banding. In addition, SG can be performed safely in morbid obese adolescents. The main limitation of this novel bariatric procedure is the lack of longterm data on sustained weight loss and resolution of obesity related comorbidities. Moreover, the fact that SG is an irreversible operation adds to its weakness as a bariatric procedure, at least until definitive results concerning its efficacy are obtained. SG is effective and safe as a single-stage procedure for certain cohorts of patients. However, the broad application of SG as a single-stage procedure in the bariatric field can be established only if the procedure is standardized and longterm results are available.

  20. 14 CFR 437.31 - Verification of operating area containment and key flight-safety event limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...(a) to contain its reusable suborbital rocket's instantaneous impact point within an operating area... limits on the ability of the reusable suborbital rocket to leave the operating area; or (2) Abort... requirements of § 437.59 to conduct any key flight-safety event so that the reusable suborbital...

  1. 14 CFR 437.31 - Verification of operating area containment and key flight-safety event limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...(a) to contain its reusable suborbital rocket's instantaneous impact point within an operating area... limits on the ability of the reusable suborbital rocket to leave the operating area; or (2) Abort... requirements of § 437.59 to conduct any key flight-safety event so that the reusable suborbital...

  2. 14 CFR 101.25 - Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Power Rockets and Class 3-Advanced High Power Rockets. 101.25 Section 101.25 Aeronautics and Space... OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.25 Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets. When...

  3. 14 CFR 437.31 - Verification of operating area containment and key flight-safety event limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...(a) to contain its reusable suborbital rocket's instantaneous impact point within an operating area... limits on the ability of the reusable suborbital rocket to leave the operating area; or (2) Abort... requirements of § 437.59 to conduct any key flight-safety event so that the reusable suborbital...

  4. 14 CFR 101.25 - Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Power Rockets and Class 3-Advanced High Power Rockets. 101.25 Section 101.25 Aeronautics and Space... OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.25 Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets. When...

  5. 14 CFR 101.25 - Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Power Rockets and Class 3-Advanced High Power Rockets. 101.25 Section 101.25 Aeronautics and Space... OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.25 Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets. When...

  6. 14 CFR 101.25 - Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Power Rockets and Class 3-Advanced High Power Rockets. 101.25 Section 101.25 Aeronautics and Space... OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.25 Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets. When...

  7. 14 CFR 101.25 - Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Power Rockets and Class 3-Advanced High Power Rockets. 101.25 Section 101.25 Aeronautics and Space... OPERATING RULES MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS Amateur Rockets § 101.25 Operating limitations for Class 2-High Power Rockets and Class 3-Advanced High Power Rockets. When...

  8. 14 CFR 437.31 - Verification of operating area containment and key flight-safety event limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...(a) to contain its reusable suborbital rocket's instantaneous impact point within an operating area... limits on the ability of the reusable suborbital rocket to leave the operating area; or (2) Abort... requirements of § 437.59 to conduct any key flight-safety event so that the reusable suborbital...

  9. 14 CFR 437.31 - Verification of operating area containment and key flight-safety event limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...(a) to contain its reusable suborbital rocket's instantaneous impact point within an operating area... limits on the ability of the reusable suborbital rocket to leave the operating area; or (2) Abort... requirements of § 437.59 to conduct any key flight-safety event so that the reusable suborbital...

  10. Object-oriented process dose modeling for glovebox operations

    SciTech Connect

    Boerigter, S.T.; Fasel, J.H.; Kornreich, D.E.

    1999-06-01

    The Plutonium Facility at Los Alamos National Laboratory supports several defense and nondefense-related missions for the country by performing fabrication, surveillance, and research and development for materials and components that contain plutonium. Most operations occur in rooms with one or more arrays of gloveboxes connected to each other via trolley gloveboxes. Minimizing the effective dose equivalent (EDE) is a growing concern as a result of steadily declining allowable dose limits being imposed and a growing general awareness of safety in the workplace. In general, the authors discriminate three components of a worker`s total EDE: the primary EDE, the secondary EDE, and background EDE. A particular background source of interest is the nuclear materials vault. The distinction between sources inside and outside of a particular room is arbitrary with the underlying assumption that building walls and floors provide significant shielding to justify including sources in other rooms in the background category. Los Alamos has developed the Process Modeling System (ProMoS) primarily for performing process analyses of nuclear operations. ProMoS is an object-oriented, discrete-event simulation package that has been used to analyze operations at Los Alamos and proposed facilities such as the new fabrication facilities for the Complex-21 effort. In the past, crude estimates of the process dose (the EDE received when a particular process occurred), room dose (the EDE received when a particular process occurred in a given room), and facility dose (the EDE received when a particular process occurred in the facility) were used to obtain an integrated EDE for a given process. Modifications to the ProMoS package were made to utilize secondary dose information to use dose modeling to enhance the process modeling efforts.

  11. Using Model-Based Reasoning for Autonomous Instrument Operation

    NASA Technical Reports Server (NTRS)

    Johnson, Mike; Rilee, M.; Truszkowski, W.; Powers, Edward I. (Technical Monitor)

    2000-01-01

    Multiprobe missions are an important part of NASA's future: Cluster, Magnetospheric Multi Scale, Global Electrodynamics and Magnetospheric Constellation are representatives from the Sun-Earth Connections Theme. To make such missions robust, reliable, and affordable, ideally the many spacecraft of a constellation must be at least as easy to operate as one spacecraft is today. To support this need for scalability, science instrumentation must become increasingly easy to operate, even as this same instrumentation becomes more capable and advanced. Communication and control resources will be at a premium for future instruments. Many missions will be out of contact with ground operators for extended periods either to reduce operations cost or because of orbits that limit communication to weekly perigee transits. Autonomous capability is necessary if such missions are to effectively achieve their operational objectives. An autonomous system is one that acts given its situation in a mission appropriate manner without external direction to achieve mission goals. To achieve this capability autonomy must be built into the system through judicious design or through a built-in intelligence that recognizes system state and manages system response. To recognize desired or undesired system states, the system must have an implicit or explicit understanding of its expected states given its history and self observations. The systems we are concerned with, science instruments, can have stringent requirements for system state knowledge in addition to requirements driven by health and safety concerns. Without accurate knowledge of the system state, the usefulness of the science instrument may be severely limited. At the same time, health and safety concerns often lead to overly conservative instrument operations further reducing the effectiveness of the instrument. These requirements, coupled with overall mission requirements including lack of communication opportunities and tolerance

  12. 36 CFR 1254.82 - What limitations apply to my use of self-service card-operated copiers?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... limitations apply to my use of self-service card-operated copiers? (a) There is a 5-minute time limit on... for an extended time period. (b) If we must cancel an appointment due to copier failure, we make every effort to schedule a new mutually agreed-upon time. However, we do not displace researchers...

  13. 40 CFR Table 35 to Subpart Uuu of... - Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Limits for HAP Emissions From Sulfur Recovery Units 35 Table 35 to Subpart UUU of Part 63 Protection of... Sulfur Recovery Units Pt. 63, Subpt. UUU, Table 35 Table 35 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units As stated in §...

  14. 40 CFR Table 35 to Subpart Uuu of... - Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Limits for HAP Emissions From Sulfur Recovery Units 35 Table 35 to Subpart UUU of Part 63 Protection of... Operating Limits for HAP Emissions From Sulfur Recovery Units As stated in § 63.1568(c)(1), you shall meet... Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur...

  15. 40 CFR Table 35 to Subpart Uuu of... - Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Limits for HAP Emissions From Sulfur Recovery Units 35 Table 35 to Subpart UUU of Part 63 Protection of... Operating Limits for HAP Emissions From Sulfur Recovery Units As stated in § 63.1568(c)(1), you shall meet... Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur...

  16. 40 CFR Table 35 to Subpart Uuu of... - Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Limits for HAP Emissions From Sulfur Recovery Units 35 Table 35 to Subpart UUU of Part 63 Protection of... Sulfur Recovery Units Pt. 63, Subpt. UUU, Table 35 Table 35 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units As stated in §...

  17. 40 CFR Table 35 to Subpart Uuu of... - Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Limits for HAP Emissions From Sulfur Recovery Units 35 Table 35 to Subpart UUU of Part 63 Protection of... Sulfur Recovery Units Pt. 63, Subpt. UUU, Table 35 Table 35 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units As stated in §...

  18. A methodology for evaluating and reducing rotor losses, heating, and operational limitations of high-speed flywheel batteries

    NASA Astrophysics Data System (ADS)

    Flynn, Mark Matthew

    Flywheel batteries are machines that store kinetic energy in the form of a rotating flywheel. Energy is transferred to and from the flywheel via a motor-generator mounted on the flywheel rotor. For mobile systems in particular, it is important to maximize the stored energy while minimizing the mass and volume of the flywheel battery. This requirement leads to the use of high rotational speeds which in turn necessitates the use of composite materials for flywheel construction, magnetic bearings for reduced wear and friction losses, and a low pressure environment to reduce windage losses. With the flywheel rotor suspended on magnetic bearings and operating in a partial vacuum, radiation becomes the primary heat transfer mode for removing losses incurred on the rotor. Radiative heat transfer from the rotor to the flywheel battery housing is limited by the relatively low maximum allowable temperature of the composite materials and the permanent magnets which are often used in the motor-generator. In order to ensure the feasibility of a high-speed flywheel battery design it then becomes paramount to properly manage the total rotor losses as well as the heat removal strategy. This dissertation develops a methodology for accurately modeling the components of rotor heating in high-speed flywheel batteries with a focus on mobile systems employing an integrated design whereby the motor-generator is integrated with the flywheel into a common vacuum housing. The methodology makes it possible to reduce losses through design, construction, and operation so that high-speed flywheel batteries made with temperature sensitive components such as permanent magnets and composite materials can be operated without serious overheating. The rotor loss origins are investigated with respect to windage, magnetic bearing, and motor-generator sources in general, and with specific regard to a metropolitan transit bus flywheel battery system developed by the University of Texas Center for

  19. 40 CFR 63.4292 - What operating limits must I meet?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Standards for Hazardous Air Pollutants: Printing, Coating, and Dyeing of Fabrics and Other Textiles Emission... operation, or dyeing/finishing operation on which you use the compliant material option; web coating/printing operation or dyeing/finishing operation on which you use the emission rate without add-on...

  20. Limitations of model-fitting methods for lensing shear estimation

    NASA Astrophysics Data System (ADS)

    Voigt, L. M.; Bridle, S. L.

    2010-05-01

    Gravitational lensing shear has the potential to be the most powerful tool for constraining the nature of dark energy. However, accurate measurement of galaxy shear is crucial and has been shown to be non-trivial by the Shear TEsting Programme. Here, we demonstrate a fundamental limit to the accuracy achievable by model-fitting techniques, if oversimplistic models are used. We show that even if galaxies have elliptical isophotes, model-fitting methods which assume elliptical isophotes can have significant biases if they use the wrong profile. We use noise-free simulations to show that on allowing sufficient flexibility in the profile the biases can be made negligible. This is no longer the case if elliptical isophote models are used to fit galaxies made up of a bulge plus a disc, if these two components have different ellipticities. The limiting accuracy is dependent on the galaxy shape, but we find the most significant biases (~1 per cent of the shear) for simple spiral-like galaxies. The implications for a given cosmic shear survey will depend on the actual distribution of galaxy morphologies in the Universe, taking into account the survey selection function and the point spread function. However, our results suggest that the impact on cosmic shear results from current and near future surveys may be negligible. Meanwhile, these results should encourage the development of existing approaches which are less sensitive to morphology, as well as methods which use priors on galaxy shapes learnt from deep surveys.