Sample records for medium-voltage dvr-theoretical investigations

  1. Medium voltage drives - challenges and requirements

    Microsoft Academic Search

    Haitham Abu-Rub; Arkadiusz Lewicki; Atif Iqbal; Jaroslaw Guzinski

    2010-01-01

    The design and application of medium voltage (MV) drives are associated with different requirements related to the line side and motor side of the drive. This paper presents a brief review of the existing challenges and requirements for employing medium voltage drives in various industries. Line side, motor side, and converter problems and requirements are described. The aim of the

  2. Scalable High Insulation Power Supply for Medium Voltage Power Converters

    Microsoft Academic Search

    Iosu Aizpuru; Jose Maria Canales; Jesus Fernandez

    2012-01-01

    Medium Voltage (MV) Power devices are used in High Power applications. To use MV devices in High Power applications is necessary to use series connection configurations, multilevel topologies, or cascade connections due to semiconductors voltage limitations. These devices are connected to Medium Voltage so we need High Insulation between Low Voltage Power Supplies and the semiconductor drivers. In this paper

  3. Broadband Power Line Communications: The factors Influencing Wave Propagations in the Medium Voltage Lines

    Microsoft Academic Search

    Justinian Anatory; Nelson Theethayi; Mussa Kissaka; Nerey Mvungi

    2007-01-01

    This paper presents the influencing of load impedance, line length and branches on the performance of medium voltage power line communication (PLC) network. The power line network topology adopted here is similar to that of the system in Tanzania. Different investigation with regard to network load impedances, direct line length (from transmitter to receiver), branched line length and number of

  4. Allocation of power in medium voltage DC distribution circuits

    Microsoft Academic Search

    George L. Kusic

    2011-01-01

    in this paper, dynamic programming is applied to forthcoming medium voltage direct current (MVDC) substations which have a mixture of power sources, renewable energy, and storage. Technical changes in the substation due to the dc equipment, efficiency of the substation, and protective measures are major aspects to consider in the MVDC development. The paper demonstrates how dynamic programming can minimize

  5. 30 CFR 75.907 - Design of trailing cables for medium-voltage circuits.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false Design of trailing cables for medium-voltage circuits. 75.907 Section...STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory...

  6. Commercialization of Medium Voltage HTS Triax TM Cable Systems

    SciTech Connect

    Knoll, David

    2012-12-31

    The original project scope that was established in 2007 aimed to install a 1,700 meter (1.1 mile) medium voltage HTS Triax{TM} cable system into the utility grid in New Orleans, LA. In 2010, however, the utility partner withdrew from the project, so the 1,700 meter cable installation was cancelled and the scope of work was reduced. The work then concentrated on the specific barriers to commercialization of HTS cable technology. The modified scope included long-length HTS cable design and testing, high voltage factory test development, optimized cooling system development, and HTS cable life-cycle analysis. In 2012, Southwire again analyzed the market for HTS cables and deemed the near term market acceptance to be low. The scope of work was further reduced to the completion of tasks already started and to testing of the existing HTS cable system in Columbus, OH. The work completed under the project included: • Long-length cable modeling and analysis • HTS wire evaluation and testing • Cable testing for AC losses • Optimized cooling system design • Life cycle testing of the HTS cable in Columbus, OH • Project management. The 200 meter long HTS Triax{TM} cable in Columbus, OH was incorporated into the project under the initial scope changes as a test bed for life cycle testing as well as the site for an optimized HTS cable cooling system. The Columbus cable utilizes the HTS TriaxTM design, so it provided an economical tool for these of the project tasks.

  7. Medium voltage motor harmonic heating, torques and voltage stress when applied on VFDs

    Microsoft Academic Search

    Frank A. DeWinter; Bin Wu

    1996-01-01

    The increase in the application of medium voltage variable frequency drives to AC motors has raised concerns regarding the effects the drives have on the motors. Most of the published data available is for low voltage motors and drives, which are not necessarily accurate for the medium voltage applications. We address the harmonic heating, torques and voltage stress that are

  8. 30 CFR 77.900 - Low- and medium-voltage circuits serving portable or mobile three-phase alternating current...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...portable or mobile three-phase alternating current equipment; circuit breakers. 77...Low- and Medium-Voltage Alternating Current Circuits § 77.900 Low- and medium-voltage...portable or mobile three-phase alternating current equipment; circuit breakers....

  9. 30 CFR 75.900 - Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...circuits serving three-phase alternating current equipment; circuit breakers. 75...Low- and Medium-Voltage Alternating Current Circuits § 75.900 Low- and medium-voltage...circuits serving three-phase alternating current equipment; circuit breakers....

  10. 30 CFR 77.900 - Low- and medium-voltage circuits serving portable or mobile three-phase alternating current...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...portable or mobile three-phase alternating current equipment; circuit breakers. 77...Low- and Medium-Voltage Alternating Current Circuits § 77.900 Low- and medium-voltage...portable or mobile three-phase alternating current equipment; circuit breakers....

  11. 30 CFR 75.900 - Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...circuits serving three-phase alternating current equipment; circuit breakers. 75...Low- and Medium-Voltage Alternating Current Circuits § 75.900 Low- and medium-voltage...circuits serving three-phase alternating current equipment; circuit breakers....

  12. 30 CFR 77.900 - Low- and medium-voltage circuits serving portable or mobile three-phase alternating current...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...portable or mobile three-phase alternating current equipment; circuit breakers. 77...Low- and Medium-Voltage Alternating Current Circuits § 77.900 Low- and medium-voltage...portable or mobile three-phase alternating current equipment; circuit breakers....

  13. 30 CFR 75.900 - Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...circuits serving three-phase alternating current equipment; circuit breakers. 75...Low- and Medium-Voltage Alternating Current Circuits § 75.900 Low- and medium-voltage...circuits serving three-phase alternating current equipment; circuit breakers....

  14. Hexagram rectifier - Active front end of hexagram inverter for medium voltage variable speed drives

    Microsoft Academic Search

    Jun Wen; Keyue Ma Smedley

    2008-01-01

    Hexagram Inverter that built from six standard three-phase two-level voltage source converters (VSCs) has been proposed recently for medium voltage adjustable speed drive applications. It has the advantages of modular structure, no voltage unbalance, easy control, low voltage stress and low DC energy storage etc. This paper will propose the hexagram rectifier as the active front end for the hexagram

  15. Severe degradation of the conductor screen of service and laboratory aged medium voltage XLPE insulated cables

    Microsoft Academic Search

    Sverre Hvidsten; Stine Kvande; Arve Ryen; Per Bjørn Larsen

    2009-01-01

    The main purpose of this paper is to show the strong correlation between corrosion of the metallic aluminum conductor and the formation of interconnected cracks \\/ voids in the conductor screen, creating initiation sites for vented water trees in service aged medium voltage XLPE cables. The results show that porous structures in the conductor screen previously reported for laboratory aged

  16. On-site diagnostic tests on medium voltage, XLPE-insulated power cables

    Microsoft Academic Search

    Mahmoud Abou Dakka; Alexander Bulinski; Soli Bamji

    2008-01-01

    The dc depolarization current measurement technique was used to test 20 medium voltage, underground XLPE-insulated cables in the local utility power distribution network between January and March 2006 and then in March 2007. The cables varied in length (30 m to ~1600 m), voltage rating (9 to 28 kV), and age (4 to 36 years). Unlike a typical depolarization current

  17. Modeling and experimental verification of high impedance arcing fault in medium voltage networks

    Microsoft Academic Search

    Nagy I. Elkalashy; Matti Lehtonen; Hatem A. Darwish; Mohamed A. Izzularab; Abdel-Maksoud I. Taalab

    2007-01-01

    A high impedance arcing fault due to a leaning tree in medium voltage (MV) networks is modeled and experimentally verified. The fault is represented in two parts; an arc model and a high resistance. The arc is generated by a leaning tree towards the network conductor and the tree resistance limits the fault current. The arcing element is dynamically simulated

  18. Electromagnetic compatibility of digital protective relays installed in medium voltage switchgear

    Microsoft Academic Search

    P. Montignies; B. Jover

    2008-01-01

    Digital microprocessor based protective relays, installed in low voltage compartments of medium voltage switchgear and\\/or in control panels, become more and more exposed to EMC disturbances due to interferences that may affect the power quality of electrical networks. End-users sometimes report unexpected circuit breaker tripping and significant financial consequences due to process discontinuity. After analysis, it is quite easy to

  19. A new approach to enhance power quality for medium voltage drives

    Microsoft Academic Search

    P. W. Hammond

    1995-01-01

    A new approach to medium voltage, variable frequency, static AC motor drives offers improvements in power quality. Harmonic current injection into power lines is below the most severe requirements of IEEE 519-1992. The power factor of this new type of drive exceeds 94% at full load and is above 90% at 10% load. Motor voltage and current waveforms are improved

  20. Characteristics and measurement of capacitor switching at medium voltage distribution level

    Microsoft Academic Search

    C. E. McCoy; B. L. Floryancic

    1993-01-01

    Capacitors are used extensively in power systems for power factor improvement. There are occasions when capacitor bank switching on or offline is required. The main\\/basic characteristics and impact that capacitors and capacitor switching cause on medium voltage plant distribution systems are discussed. Analytical information and the results of actual measurement are included. The measurement equipment used also provides harmonic spectrum

  1. Fault location in medium voltage networks by the help of adapted triangulation principle

    Microsoft Academic Search

    Marek Höger; Peter Braciník; Juraj Altus; A. Otc?ena?s?ova?

    2010-01-01

    This paper describes a new fault location method for medium voltage networks consisting of power distribution lines with tree topology. The method is based on the adaptation of triangulation principle. It uses the detection of undervoltage wave propagation as a source of information for fault location calculation. The paper gives short description of triangulation principle adaptation, needed input data as

  2. The Effects of Load Impedance, Line Length, and Branches in the BPLC—Transmission-Lines Analysis for Medium-Voltage Channel

    Microsoft Academic Search

    Justinian Anatory; Nelson Theethayi; Mussa M. Kissaka; Nerey H. Mvungi; Rajeev Thottappillil

    2007-01-01

    This paper presents the effects of load impedance, line length and branches on the performance of medium-voltage power-line communication (PLC) network. The power-line network topology adopted here is similar to that of the system in Tanzania. Different investigation with regard to network load impedances, direct line length (from transmitter to receiver), branched line length and number of branches has been

  3. An optical device for an automated temporization of diagnostic tools for medium voltage substation

    NASA Astrophysics Data System (ADS)

    De Maria, L.; Pistoni, N. C.; Bartalesi, D.

    2013-05-01

    This work describes a fibre optic device suitable for generating a trigger signal for a Medium Voltage substation monitoring system. It is based on the use of a low-cost transparent electro-optic ceramic for tracking electric field/voltage changes at the electric network frequency (50/60Hz). Results of tests carried out on a preliminary optical sensor, performed by means of a Voltage Calibrator, were in good agreement with the modelled sensor response to AC and DC voltages. This confirmed the effectiveness of the proposed model approach. Through simulation sensor parameters and layout were optimised for implementing a robust, low cost and easy installable optical device able to properly trigger a set of optical diagnostic tools for Medium Voltage switchboards.

  4. An amorphous alloy core medium frequency magnetic-link for medium voltage photovoltaic inverters

    NASA Astrophysics Data System (ADS)

    Rabiul Islam, Md.; Guo, Youguang; Wei Lin, Zhi; Zhu, Jianguo

    2014-05-01

    The advanced magnetic materials with high saturation flux density and low specific core loss have led to the development of an efficient, compact, and lightweight multiple-input multiple-output medium frequency magnetic-link. It offers a new route to eliminate some critical limitations of recently proposed medium voltage photovoltaic inverters. In this paper, a medium frequency magnetic-link is developed with Metglas amorphous alloy 2605S3A. The common magnetic-link generates isolated and balanced multiple DC supplies for all of the H-bridge inverter cells of the medium voltage inverter. The design and implementation of the prototype, test platform, and the experimental test results are analyzed and discussed. The medium frequency non-sinusoidal excitation electromagnetic characteristics of alloy 2605S3A are also compared with that of alloy 2605SA1. It is expected that the proposed new technology will have great potential for future renewable power generation systems and smart grid applications.

  5. A Transformerless Medium-Voltage STATCOM Topology Based on Extended Modular Multilevel Converters

    Microsoft Academic Search

    M. Tavakoli Bina

    2011-01-01

    A new transformerless four-leg topology is suggested for shunt compensation, the modular multilevel converters (MMC) based on the half-bridge converters, to achieve higher perfor- mance as a STATCOM in a distorted and unbalanced medium- voltage large-current (MV-LC) system. Further, an extended MMC (EMMC) is proposed in order to manage more accurate compen- sation for high-power applications. Both proposals can be

  6. Interference Evaluation of Overhead Medium-Voltage Broadband Power Line Systems

    Microsoft Academic Search

    Song Liu; Larry J. Greenstein

    2010-01-01

    We analyze the radio interference from a broadband power line (BPL) system operating between 2 MHz and several tens of megahertz. The overhead medium-voltage power line is modeled as a three-phase set of parallel wires above a lossy earth. A near-exact solution, based on previous approaches for infinitely long lines, is presented for the fields from arbitrarily long lines. A

  7. Power quality improvement at medium-voltage grids using Hexagram Active Power Filter

    Microsoft Academic Search

    Jun Wen; Liang Zhou; Keyue Smedley

    2010-01-01

    A new Hexagram Active Power Filter (APF) is proposed for harmonics elimination at medium-voltage grids. The new converter is composed of six interconnected three-phase standard two-level voltage source converter modules with advantages including modular structure with easy construction and maintenance, no voltage unbalance problem, reduced voltage stress, symmetrical structure with automatic and equal voltage and current sharing, and easy control

  8. Hexagram Inverter for Medium-Voltage Six-Phase Variable-Speed Drives

    Microsoft Academic Search

    Jun Wen; Keyue Ma Smedley

    2008-01-01

    A new multilevel inverter - hexagram inverter is proposed for medium-voltage (MV) variable-speed-drive (VSD) applications, which is composed of six standard two-level voltage source inverter (VSI) modules interconnected through the inductors. With six AC terminals, it can be used for both three- and six-phase drives. This paper studies its six-phase applications. Compared to a same output power and voltage VSI,

  9. Reactive power compensation and harmonics elimination at Medium-Voltage using Hexagram converter

    Microsoft Academic Search

    Jun Wen; Liang Zhou; Keyue Smedley

    2010-01-01

    This paper introduced Hexagram converter - a new type of multilevel converter for reactive power compensation and harmonics elimination at Medium-Voltage (MV) grids to improve the power quality. The Hexagram converter is composed of six three-phase two-level Voltage Source Converters (VSCs) interconnected through the inductors, and has the advantages of modular structure with easy construction, even and much reduced voltage

  10. Lightning protection of medium voltage overhead lines by modular long-flashover arresters

    Microsoft Academic Search

    Georgij V. Podporkin; Vladimir E. Pilshikov; Alexander D. Sivaev

    2003-01-01

    A long flashover arrester (LFA), which comprises three flashover modules using the creeping discharge effect, is described in this paper. In this design, the total arrester-stressing voltage is applied simultaneously to all of the modules so that the voltage-time characteristics of the arrester are improved considerably assuring reliable protection of medium voltage (e.g. 10 kV) overhead power lines against both

  11. NEMO medium voltage converter factory acceptance, operational and final integration tests

    NASA Astrophysics Data System (ADS)

    Cocimano, Rosanna; NEMO Collaboration

    2011-01-01

    The NEMO Collaboration, as part of the KM3NeT EU-funded consortium, is developing technical solutions for the construction of a cubic-kilometer scale neutrino telescope in the Mediterranean sea several kilometers below the sea level and far from the shore. In this framework, after years of design, development, assembly and testing the Alcatel deep sea medium voltage power converter (MVC) is ready for deployment at 100 km from the Capo Passero shore station. The MVC converts the 10 kV to an instrument-friendly 375 V for a 10 kW power. The MVC will be presented with focus on the factory acceptance, operational and final integration tests that recently have been carried out.

  12. Void formation in NiTi shape memory alloys by medium-voltage electron irradiation

    SciTech Connect

    Schlossmacher, P.; Stober, T. [Forschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Materialforschung I] [Forschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Materialforschung I

    1995-12-15

    In-situ electron irradiation experiments of NiTi shape memory alloys, using high-voltage transmission electron microscopes, result in amorphization of the intermetallic compound. In all of these experiments high-voltages more than 1.0 MeV had to be applied in order to induce the crystalline-to-amorphous transformation. To their knowledge no irradiation effects of medium-voltage electrons of e.g. 0.5 MeV have been reported in the literature. In this contribution, the authors describe void formation in two different NiTi shape memory alloys, resulting from in-situ electron irradiation, using a 300 kV electron beam in a transmission electron microscope. First evidence is presented that void formation is correlated with the total oxygen content of the alloys.

  13. Strategies for mitigating the effects of internal arcing faults in medium-voltage metal-enclosed switchgear

    Microsoft Academic Search

    M. Wactor; T. W. Olsen; C. J. Ball; D. J. Lemmerman; R. J. Puckett; J. Zawadzki

    2001-01-01

    There are numerous strategies currently employed to mitigate the effects of an internal arcing fault in medium-voltage metal-enclosed switchgear. As we learn more about the behavior of the arcing fault and how the switchgear and installation affect the severity of the fault, it is recognized that many of the techniques may be combined to improve performance. A review of the

  14. Analysis of common mode voltage-“neutral shift” in medium voltage PWM adjustable speed drive (MV-ASD) systems

    Microsoft Academic Search

    Dudi A. Rendusara; E. Cengelci; Prasad N. Enjeti; Victor R. Stefanovic; James W. Gray

    2000-01-01

    In this paper, an analysis of common mode voltage or “neutral lift” in the new emerging voltage source inverter type medium voltage adjustable speed drive (MV-ASD) systems is presented. Both cascaded multilevel (CML) inverter and 3-level NPC inverter topologies are analyzed. An equivalent circuit model to determine the common mode voltage stress is presented. Analysis and simulation results are discussed

  15. Calculation of pressure and temperature in medium-voltage electrical installations due to fault arcs

    NASA Astrophysics Data System (ADS)

    Zhang, X.; Zhang, J.; Gockenbach, E.

    2008-05-01

    In order to determine the pressure rise due to arc faults in electrical installations, the portion of energy heating the surrounding gas of fault arcs has to be known. The ratio of the portion of energy to the electric energy, the thermal transfer coefficient, is adopted as the kp factor. This paper presents a theoretical approach for the determination of the thermal transfer coefficient and the pressure rise in electrical installations. It is based on the fundamental hydro- and thermodynamic conservation equations and the equation of gas state taking into account melting and evaporation of metals as well as chemical reactions with the surrounding gas. In order to consider the dependence of the arc energy on the gas density, the radiative effect of fault arcs on the energy balance is introduced into the arc model by using the net emission coefficient as a function of gas density, arc temperature and arc radius. The results for a test container show that factors such as the kinds of insulating gases and of electrode materials, the size of test vessels and the gas density considerably influence the thermal transfer coefficient and thus the pressure rise. Furthermore, it is demonstrated, for an example of the arc fault in a compact medium-voltage station with pressure relief openings and a pressure relief channel, that the arc energy and the arc temperature can be simulated based on the changing gas density.

  16. Optical sensors for electrical elements of a medium voltage distribution network

    NASA Astrophysics Data System (ADS)

    De Maria, Letizia; Bartalesi, Daniele; Serragli, Paolo; Paladino, Domenico

    2012-04-01

    The aging of most of the components of the National transmission and distribution system can potentially influence the reliability of power supply in a Medium Voltage (MV) network. In order to prevent possible dangerous situations, selected diagnostic indicators on electrical parts exploiting reliable and potentially low-cost sensors are required. This paper presents results concerning two main research activities regarding the development and application of innovative optical sensors for the diagnostic of MV electrical components. The first concerns a multi-sensor prototype for the detection of pre-discharges in MV switchboards: it is the combination of three different types of sensors operating simultaneously to detect incipient failure and to reduce the occurrence of false alarms. The system is real-time controlled by an embedded computer through a LabView interface. The second activity refers to a diagnostic tool to provide significant real-time information about early aging of MV/Low Voltage (LV) transformers by means of its vibration fingerprint. A miniaturized Optical Micro-Electro-Mechanical System (MEMS) based unit has been assembled for vibration measurements, wireless connected to a remote computer and controlled via LabView interface. Preliminary comparative tests were carried out with standard piezoelectric accelerometers on a conventional MV/LV test transformer under open circuit and in short-circuited configuration.

  17. Comparison of Medium-Voltage cascaded H-bridge inverter and Hexagram inverter for motor drive applications

    Microsoft Academic Search

    Liang Zhou; Keyue Smedley

    2010-01-01

    This paper describes the design of 1MVA 4.16kV Medium-Voltage motor drive using Hexagram inverter, and is compared to Cascaded H-bridge inverter motor drive system. System design and component selection is elaborated for motor drive system using both topologies. Power loss and reliability is also estimated for comparison purpose. Fault tolerant control is a feature for both motor drive system and

  18. A New Multilevel Inverter - Hexagram Inverter for Medium Voltage Adjustable Speed Drive Systems Part II. Three-phase Motor Drive

    Microsoft Academic Search

    Jun Wen; Keyue Smedley

    2007-01-01

    A new multilevel inverter - Hexagram inverter [6] is proposed for medium-voltage adjustable speed drive systems. The new inverter is constructed by interconnecting six three-phase inverter modules. With six output terminals, hexagram inverter has two operation options: six-phase motor drive or three-phase motor drive (neutral floating). Article [7] has analyzed and verified the six-phase operation; therefore, the three-phase operation will

  19. Hexagram Rectifier—Active Front End of Hexagram Inverter for Medium-Voltage Variable-Speed Drives

    Microsoft Academic Search

    Jun Wen; Keyue Smedley

    2008-01-01

    Recently, a new multilevel inverter-hexagram inverter has been reported for medium-voltage (MV) variable-speed drives (VSDs). This paper will propose a hexagram rectifier as the active front end for the hexagram-based MV VSD systems. The control of the hexagram rectifier is based on one-cycle control-an excellent control scheme for switching power converters. With the proposed control scheme, unity power factor at

  20. Motor shaft voltages and bearing currents and their reduction in multilevel medium-voltage PWM voltage-source-inverter drive applications

    Microsoft Academic Search

    Fei Wang

    2000-01-01

    This paper presents test results on problems and solutions of motor shaft voltages and bearing currents in medium-voltage pulsewidth modulated (PWM) drive systems. Tests show that multilevel medium-voltage PWM voltage-source inverter drives can cause motor bearing currents, similar to a low-voltage PWM drives, even with one motor bearing insulated. Common-mode voltages generated as a result of PWM switching are observed

  1. Medium Voltage–High Power Converter Topologies Comparison Procedure, for a 6.6 kV Drive Application Using 4.5 kV IGBT Modules

    Microsoft Academic Search

    Alain Sanchez-Ruiz; Mikel Mazuela; Silverio Alvarez; Gonzalo Abad; Igor Baraia

    2012-01-01

    This paper presents a general comparison procedure for medium voltage - high power multilevel converter topologies and semiconductors, which is mainly based on analyzing the per- formance limits of the converters output characteristics such as the output voltage, current, active power, efficiency, etc. Afterwards, the general procedure is applied to compare some of the most relevant converter topologies oriented to

  2. A Transformerless Hybrid Active Filter Capable of Complying with Harmonic Guidelines for Medium-Voltage Motor Drives

    NASA Astrophysics Data System (ADS)

    Kondo, Ryota; Akagi, Hirofumi

    This paper presents a transformerless hybrid active filter that is integrated into medium-voltage adjustable-speed motor drives for fans, pumps, and compressors without regenerative braking. The authors have designed and constructed a three-phase experimental system rated at 400V and 15kW, which is a downscaled model from a feasible 6.6-kV 1-MW motor drive system. This system consists of the hybrid filter connecting a passive filter tuned to the 7th harmonic filter in series with an active filter that is based on a three-level diode-clamped PWM converter, as well as an adjustable-speed motor drive in which a diode rectifier is used as the front end. The hybrid filter is installed on the ac side of the diode rectifier with no line-frequency transformer. The downscaled system has been exclusively tested so as to confirm the overall compensating performance of the hybrid filter and the filtering performance of a switching-ripple filter for mitigating switching-ripple voltages produced by the active filter. Experimental results verify that the hybrid filter achieves harmonic compensation of the source current in all the operating regions from no-load to the rated-load conditions, and that the switching-ripple filter reduces the switching-ripple voltages as expected.

  3. A Medium-Voltage Motor Drive with a Modular Multilevel PWM Inverter Part I. Experimental Verification by a 400-V, 15kW Downscaled Model

    Microsoft Academic Search

    Makoto Hagiwara; Kazutoshi Nishimura; Hirofumi Akagi

    2010-01-01

    This paper presents a medium-voltage motor drive with a three-phase modular multilevel PWM inverter and focuses on its control method and operating performance. This motor drive is particularly suitable for fans, blowers, pumps, and compressors, in which the load torque is proportional to the square of the rotating speed. Particular attention is paid to the dc-capacitor voltage fluctuation of each

  4. A New Multilevel Inverter - Hexagram Inverter for Medium-Voltage Adjustable Speed Drive Systems Part I. Six-phase Motor Drive

    Microsoft Academic Search

    Jun Wen; Keyue Smedley

    2007-01-01

    A new multilevel inverter - Hexagram inverter [12], is introduced for medium-voltage adjustable speed drive systems. The new inverter is composed of six interconnected three-phase six-switch modules. With six terminals, Hexagram inverter can be configured for both six-phase and three-phase (floating neutral) motor drive. The focus of this paper is on Hexagram inverter for six-phase motor drive. With proposed Hexagram

  5. Low Wind Speed Turbine Project Phase II: The Application of Medium-Voltage Electrical Apparatus to the Class of Variable Speed Multi-Megawatt Low Wind Speed Turbines; 15 June 2004--30 April 2005

    SciTech Connect

    Erdman, W.; Behnke, M.

    2005-11-01

    Kilowatt ratings of modern wind turbines have progressed rapidly from 50 kW to 1,800 kW over the past 25 years, with 3.0- to 7.5-MW turbines expected in the next 5 years. The premise of this study is simple: The rapid growth of wind turbine power ratings and the corresponding growth in turbine electrical generation systems and associated controls are quickly making low-voltage (LV) electrical design approaches cost-ineffective. This report provides design detail and compares the cost of energy (COE) between commercial LV-class wind power machines and emerging medium-voltage (MV)-class multi-megawatt wind technology. The key finding is that a 2.5% reduction in the COE can be achieved by moving from LV to MV systems. This is a conservative estimate, with a 3% to 3.5% reduction believed to be attainable once purchase orders to support a 250-turbine/year production level are placed. This evaluation considers capital costs as well as installation, maintenance, and training requirements for wind turbine maintenance personnel. Subsystems investigated include the generator, pendant cables, variable-speed converter, and padmount transformer with switchgear. Both current-source and voltage-source converter/inverter MV topologies are compared against their low-voltage, voltage-source counterparts at the 3.0-, 5.0-, and 7.5-MW levels.

  6. Impact of External Magnetic Field on Plasma Current Layer Deformation During Contact Opening in Medium-Voltage Puffer $\\\\hbox{SF}_{6}$ Circuit Breaker

    Microsoft Academic Search

    Vahid Abbasi; Ahmad Gholami; Kaveh Niayesh

    2012-01-01

    A 3-D transient model has been developed to investigate plasma current deformation driven by internal and external magnetic fields and their influences on arc stability in a circuit breaker. The 3-D distribution of electric current density is obtained by solving the current continuity equation along with the generalized Ohm's law in the presence of an external magnetic field, while a

  7. 2.3-MW Medium-Voltage, Three-Level Wind Energy Inverter Applying a Unique Bus Structure and 4.5-kV Si/SiC Hybrid Isolated Power Modules: Preprint

    SciTech Connect

    Erdman, W.; Keller, J.; Grider, D.; VanBrunt, E.

    2014-11-01

    A high-efficiency, 2.3-MW, medium-voltage, three-level inverter utilizing 4.5-kV Si/SiC (silicon carbide) hybrid modules for wind energy applications is discussed. The inverter addresses recent trends in siting the inverter within the base of multimegawatt turbine towers. A simplified split, three-layer laminated bus structure that maintains low parasitic inductances is introduced along with a low-voltage, high-current test method for determining these inductances. Feed-thru bushings, edge fill methods, and other design features of the laminated bus structure provide voltage isolation that is consistent with the 10.4-kV module isolation levels. Inverter efficiency improvement is a result of the (essential) elimination of the reverse recovery charge present in 4.5-kV Si PIN diodes, which can produce a significant reduction in diode turn-off losses as well as insulated-gate bipolar transistor (IGBT) turn-on losses. The hybrid modules are supplied in industry-standard 140 mm x 130 mm and 190 mm x 130 mm packages to demonstrate direct module substitution into existing inverter designs. A focus on laminated bus/capacitor-bank/module subassembly level switching performance is presented.

  8. Improved hexagram inverter for medium-voltage variable speed drive

    Microsoft Academic Search

    Jun Wen; Liang Zhou; Keyue Smedley

    2008-01-01

    The hexagram inverter is composed of six voltage source inverter (VSI) modules interconnected through the inductors, which are required to suppress the circulating current that resulted from the modular interconnection. Design of the inductor is a challenge, where the inductance should be large enough to suppress the circulating current but small enough to minimize additional voltage drop that affects the

  9. Architecture for a High-to-Medium-Voltage Power Converter

    NASA Technical Reports Server (NTRS)

    Vorpenian, Vatche

    2008-01-01

    A power converter now undergoing development is required to operate at a DC input potential ranging between 5.5 and 10 kV and a DC output potential of 400 V at a current up to 25 A. This power converter is also required to be sufficiently compact and reliable to fit and operate within the confines of a high-pressure case to be lowered to several miles (approx.5 km) below the surface of the ocean. The architecture chosen to satisfy these requirements calls for a series/ parallel arrangement of 48 high-frequency, pulse-width-modulation (PWM), transformer-isolation DC-to-DC power converter blocks. The input sides of the converter blocks would be connected in series so that the input potential would be divided among them, each of them being exposed to an input potential of no more than 10 kV/48 . 210 V. The series connection of inputs would also enforce a requirement that all the converter blocks operate at the same input current. The outputs of the converter blocks would be connected in a matrix comprising 6 parallel legs, each leg being a cascade of eight outputs wired in series (see figure). All the converter blocks would be identical within the tolerances of the values of their components. A single voltage feedback loop would regulate the output potential. All the converter blocks would be driven by the same PWM waveform generated by this feedback loop. The power transformer of each converter block would have a unity turns ratio and would be capable of withstanding as much as 10 kVDC between its primary and secondary windings. (Although, in general, the turns ratio could be different from unity, the simplest construction for minimizing leakage and maximizing breakdown voltage is attained at a turns ratio of unity.)

  10. Numerical investigations on the pressure wave absorption and the gas cooling interacting in a

    E-print Network

    Sart, Remi

    in a porous filter, during an internal arc fault in a medium voltage cell D. Rochette a , S. Clain b , F in a porous energy absorber during an internal arc fault in a medium voltage apparatus. A one dimensional gas effect of the filter. Index Terms--- internal arc fault, medium voltage cell, porous filter, finite

  11. Electricity meters for coordinated voltage control in medium voltage networks with wind power

    Microsoft Academic Search

    Ingmar Leisse; Olof Samuelsson; Jörgen Svensson

    2010-01-01

    During the last years the amount of electricity generated by Distributed Energy Resources (DER), especially wind turbines, has been increasing a lot. These Distributed Generation (DG) units are often connected to rural distribution networks, where they have a large impact on the voltage and the network losses. The network voltage at the customers point of connection is an important quality

  12. Vacuum-fused circuit breakers for low and medium voltage AC trailing cable protection

    Microsoft Academic Search

    E. L. Checca; W. J. Helfrich

    1994-01-01

    Since the enactment of the Federal Coal Mine Safety Act of 1969, the use of fuses has not been allowed for protection for three phase AC trailing cables in underground coal mines. In 1981 a mining equipment manufacturer approached the Mine Safety and Health Administration with a combination fuse-contactor device requesting that it be permitted as a means of protection

  13. Reliability modelling of medium voltage distribution systems of nuclear power plants using generalized stochastic petri nets

    Microsoft Academic Search

    D. C. Ionescu; Anatoli Paul Ulmeanu; A. C. Constantinescu; I. Rotaru

    2006-01-01

    The purpose of this study was to obtain a performable tool based on generalized stochastic Petri nets (GSPN), able to join precise results and fast approach. In practice, it is well known that a dependability analysis in the power systems field is often more difficult to perform due to the multiple dependencies on the specific maintenance policies, on the great

  14. An Approach to the Lightning Overvoltage Protection of Medium Voltage Lines in Severe Lightning Areas

    SciTech Connect

    Omidiora, M. A.; Lehtonen, M. [Power Systems and High Voltage Engineering Laboratory, Electrical Engineering Department, Helsinki University of Technology, Otaniemi, Espoo (Finland)

    2008-05-08

    This paper deals with the effect of shield wires on lightning overvoltage reduction and the energy relief of MOV (Metal Oxide Varistor) arresters from direct strokes to distribution lines. The subject of discussion is the enhancement of lightning protection in Finnish distribution networks where lightning is most severe. The true index of lightning severity in these areas is based on the ground flash densities and return stroke data collected from the Finnish meteorological institute. The presented test case is the IEEE 34-node test feeder injected with multiple lightning strokes and simulated with the Alternative Transients Program/Electromagnetic Transients program (ATP/EMTP). The response of the distribution line to lightning strokes was modeled with three different cases: no protection, protection with surge arresters and protection with a combination of shield wire and arresters. Simulations were made to compare the resulting overvoltages on the line for all the analyzed cases.

  15. Novel BiCMOS compatible, short channel LDMOS technology for medium voltage RF & power applications

    Microsoft Academic Search

    Andrej Litwin; Olof Bengtsson; Jorgen Olsson

    2002-01-01

    We describe a very short channel, 0.15 ?m, LDMOS transistor, with a breakdown voltage of up to 45 V, manufactured in a standard 0.35 ?m BiCMOS process. At 1900 MHz and a 12 V supply voltage the 0.4 mm gate width device gives 100 mW output power P1 dB at a drain efficiency of 43%. It has a transducer power

  16. Novel BiCMOS compatible, short channel LDMOS technology for medium voltage RF and power applications

    Microsoft Academic Search

    Andrej Litwin; O. Bengtsson; J. Olsson

    2002-01-01

    We describe a very short channel, 0.15 ?m, LDMOS transistor, with a breakdown voltage of up to 45 V, manufactured in a standard 0.35 ?m BiCMOS process. At 1900 MHz and a 12 V supply voltage the 0.4 mm gate width device gives 100 mW output power P1 dB at a drain efficiency of 43%. It has a transducer power

  17. On-line diagnostics technology and repair results for medium voltage motors

    Microsoft Academic Search

    Y. P. Aksenov; I. V. Yaroshenko; G. Noe; A. V. Andreev

    2009-01-01

    This paper contains summary information on diagnostic technology principles including proactive maintenance strategy which comprises the following sections: motors on-line testing and defects location procedure; on-line diagnostic technology and data analysis; examples of test results, sensor installation in detail, and example of technical report. The Benefits of on-line diagnostics are as follows: determine - non-destructively - the probable extent of

  18. An Approach to the Lightning Overvoltage Protection of Medium Voltage Lines in Severe Lightning Areas

    NASA Astrophysics Data System (ADS)

    Omidiora, M. A.; Lehtonen, M.

    2008-05-01

    This paper deals with the effect of shield wires on lightning overvoltage reduction and the energy relief of MOV (Metal Oxide Varistor) arresters from direct strokes to distribution lines. The subject of discussion is the enhancement of lightning protection in Finnish distribution networks where lightning is most severe. The true index of lightning severity in these areas is based on the ground flash densities and return stroke data collected from the Finnish meteorological institute. The presented test case is the IEEE 34-node test feeder injected with multiple lightning strokes and simulated with the Alternative Transients Program/Electromagnetic Transients program (ATP/EMTP). The response of the distribution line to lightning strokes was modeled with three different cases: no protection, protection with surge arresters and protection with a combination of shield wire and arresters. Simulations were made to compare the resulting overvoltages on the line for all the analyzed cases.

  19. 30 CFR 75.907 - Design of trailing cables for medium-voltage circuits.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...ground check conductor, and grounded metallic shields around each power conductor or a ground metallic shield over the assembly, except that on equipment employing cable reels, cables without shields may be used if the insulation is rated...

  20. 30 CFR 75.907 - Design of trailing cables for medium-voltage circuits.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...ground check conductor, and grounded metallic shields around each power conductor or a ground metallic shield over the assembly, except that on equipment employing cable reels, cables without shields may be used if the insulation is rated...

  1. 30 CFR 75.907 - Design of trailing cables for medium-voltage circuits.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...ground check conductor, and grounded metallic shields around each power conductor or a ground metallic shield over the assembly, except that on equipment employing cable reels, cables without shields may be used if the insulation is rated...

  2. 30 CFR 75.907 - Design of trailing cables for medium-voltage circuits.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...ground check conductor, and grounded metallic shields around each power conductor or a ground metallic shield over the assembly, except that on equipment employing cable reels, cables without shields may be used if the insulation is rated...

  3. CHARACTERIZATION OF MEDIUM VOLTAGE EQUIPMENT AGEING BY MONITORING OF PARTIAL DISCHARGES CHEMICAL AND ACOUSTICAL EMISSION

    E-print Network

    Boyer, Edmond

    for in-service equipment, such as power transformers, because of the high level of electromagnetic- service equipment, chemical and acoustic measurements were simultaneously performed on a power transformer lead to the electrical failure of industrial equipment [1]. Partial discharges include (i) bulk

  4. Comparison of intracellular water content measurements by dark-field imaging and EELS in medium voltage TEM

    Microsoft Academic Search

    C. Terryn; J. Michel; L. Kilian; P. Bonhomme; G. Balossier

    2000-01-01

    Knowledge of the water content at the subcellular level is important to evaluate the intracellular concentration of either diffusible or non-diffusible elements in the physiological state measured by the electron microprobe methods. Water content variations in subcellular compartments are directly related to secretion phenomena and to transmembrane exchange processes, which could be attributed to pathophysiological states. In this paper we

  5. Modern gas insulated switchgear family ZX-an innovative solution for medium voltage applications with highest service reliability

    Microsoft Academic Search

    H. Fink

    2004-01-01

    Gas insulated switch gears (GIS) type ZX combine progressive and reliable concepts with future-oriented and innovative solutions such as gas tight switchgear technology with protection and insulation gases, vacuum switching technology, epoxy technology, integrated computer controlled switchgear units, as well as sensor-and plug-in-technology. The future oriented sensor technology uses Rogowski-coils for current metering and resistive dividers for voltage metering as

  6. Progress on IEC 60034-18-42 for Qualification of Stator Insulation for Medium-Voltage Inverter Duty Applications

    Microsoft Academic Search

    M. K. W. Stranges; G. C. Stone; D. L. Bogh

    2007-01-01

    There is an industry need for suitable methods to qualify medium-and high-voltage stator insulation systems for inverter duty applications. Technical Specification (TS) IEC 60034-18-42 is being written to address the unique requirements of form-wound micaceous systems to withstand inverter pulses, characterized by elevated voltage, fast rise times, and high frequency impulse repetition rates. These machines do not operate under the

  7. Utility-Scale Silicon Carbide Semiconductor: Monolithic Silicon Carbide Anode Switched Thyristor for Medium Voltage Power Conversion

    SciTech Connect

    None

    2010-09-01

    ADEPT Project: GeneSiC is developing an advanced silicon-carbide (SiC)-based semiconductor called an anode-switched thyristor. This low-cost, compact SiC semiconductor conducts higher levels of electrical energy with better precision than traditional silicon semiconductors. This efficiency will enable a dramatic reduction in the size, weight, and volume of the power converters and electronic devices it's used in.GeneSiC is developing its SiC-based semiconductor for utility-scale power converters. Traditional silicon semiconductors can't process the high voltages that utility-scale power distribution requires, and they must be stacked in complicated circuits that require bulky insulation and cooling hardware. GeneSiC's semiconductors are well suited for high-power applications like large-scale renewable wind and solar energy installations.

  8. The Effects of Multipath on OFDM Systems for Broadband Power-Line Communications a Case of Medium Voltage Channel

    Microsoft Academic Search

    Justinian Anatory; N. Theethayi; R. Thottappillil; C. Mwase; N. H. Mvungi

    2009-01-01

    present a quantitative analysis of how multipath fading is caused due to presence of number of branches in the link between the transmitting and receiving ends and also due to possible impedances mismatches. In this paper we attempt to quantify as to how the number of branches and terminal load impedances contribute to the performance degradation of OFDM systems in

  9. Probability Investigations

    NSDL National Science Digital Library

    2013-01-01

    This webpage contains probability investigations in the form of word problems. The investigations are located on the left hand side of the page on the navigation bar: the links are "Recommended Investigations" and "Additional Investigations". Within each investigation there are additional links to external resources that can be used to solve or illustrate the problem.

  10. Watershed Investigations

    ERIC Educational Resources Information Center

    Bodzin, Alec; Shive, Louise

    2004-01-01

    Investigating local watersheds presents middle school students with authentic opportunities to engage in inquiry and address questions about their immediate environment. Investigation activities promote learning in an investigations interdisciplinary context as students explore relationships among chemical, biological, physical, geological, and…

  11. Investigator Resources

    Cancer.gov

    A Handbook for Clinical Investigators Conducting Therapeutic Clinical Trials Supported by CTEP, DCTD, NCI. The 2014 version 1.2 of the Investigator’s Handbook is a bookmarked PDF file available for download.

  12. Fire investigation

    Microsoft Academic Search

    A. Gomberg

    1982-01-01

    There was considerable progress made on several fronts of fire investigation in the United States in recent years. Progress was made in increasing the quantity of fire investigation and reporting, through efforts to develop the National Fire Incident Reporting System. Improving overall quality of fire investigation is the objective of efforts such as the Fire Investigation Handbook, which was developed

  13. CRN Investigators

    Cancer.gov

    Skip to Main Content Home Contact Us Search CRN Investigators Executive Committee Members Steering Committee Members Executive Committee Members Lawrence H. Kushi, ScD Division of Research, Kaiser Permanente Northern California CRN Principal Investigator,

  14. Watershed Investigations

    NSDL National Science Digital Library

    Alec Bodzin

    2004-04-01

    Investigating local watersheds presents middle school students with authentic opportunities to engage in inquiry and address questions about their immediate environment in an interdisciplinary context. This article describes a collabortive project design, and provides guidelines for teachers who are interested in conducting their own watershed investigations.

  15. Inca Investigation

    NSDL National Science Digital Library

    This OLogy activity gives kids a chance to test their investigative skills while learning about daily life for the Incas. Inca Investigation begins with an introduction to archaeologist Craig Morris and the ancient Inca city that his team excavated in the Andes mountains. Detailed directions are given for how to play Inca Investigation, which includes tips to help them better examine evidence. Each time they correctly identify a place, they are awarded an Inca Chronicle. They have the option of reading the chronicles online or printing their collection of chronicles.

  16. Quaternary investigation

    SciTech Connect

    Stieve, A.

    1991-05-15

    The primary purpose of the Quaternary investigation is to provide information on the location and age of Quaternary deposits for use in evaluating the presence or absence of neotectonic deformation or paleoliquefaction features within the Savannah River Site (SRS) region. The investigation will provide a basis for evaluating the potential for capable faults and associated deformation in the SRS vicinity. Particular attention will be paid to the Pen Branch fault.

  17. Soil Investigations

    NSDL National Science Digital Library

    2014-09-18

    Students learn the basics about soil, including its formation through the cycling of the Earth's materials, as well as its characteristics and importance. They are also introduced to soil profiles and how engineers conduct site investigations to learn about soil quality for development, contamination transport, and assessing the general environmental health of an area.

  18. Sunblock Investigation

    NSDL National Science Digital Library

    2014-04-30

    In this "Sid the Science Kid" activity, learners set up a simple experiment to find out how sunscreen counteracts the effects of the sun. Use this activity to explore various topics including the Sun, weather, and sun-safety and health. This activity includes a "Sid the Science Kid" video showing how to conduct the investigation.

  19. Investigating Starch

    NSDL National Science Digital Library

    University of Nebraska State Museum

    2001-01-01

    In this activity (on pages 10-15), learners investigate starch in human diets and how plants make starch (carbohydrates) to use as their food source. Testing with a dropper of iodine in Part One, learners discover that starch content differs from food to food. In Part Two, learners taste chewed and unchewed food and compare the starch content.

  20. investigate boundaries?

    E-print Network

    ; Paradigm ffl Time­averaged motion statistics identical throughout ex­ periment. ffl Difference between to motion­defined form (this study , Lamme et al 1994, Marcar and Cowey 1992) Feedback from MT ontoPURPOSE To investigate the processing of motion boundaries in the hu­ man occipital lobe using

  1. Investigating Invasives

    NSDL National Science Digital Library

    Mary Lightbody

    2008-11-01

    Invasive species, commonly known as "invasives," are nonnative plants, animals, and microbes that completely take over and change an established ecosystem. The consequences of invasives' spread are significant. In fact, many of the species that appear on the Endangered Species list are threatened by invasives. Therefore, the topic of invasive nonnative species can provide the focus for projects that engage students in authentic science investigations. Here the author describes how she launched her students into a study of invasives while supporting their local environment using the 5E Learning Cycle (engage, explore, explain, extend, evaluate).

  2. Investigate Biodiversity

    NSDL National Science Digital Library

    A great way to learn about biodiversity is by visiting Conservation International's Investigate Biodiversity Web site. Visitors can read about biodiversity hot spots and major threats to the world's species. Of particular interest is the Expeditions Online section, detailing scientific field expeditions. Through this section, you can read daily updates and see photos of teams of scientists conducting biological surveys in remote parts of the world. After learning about Conservation International's research projects, students can follow the online guide to developing their own biodiversity field study. This well designed Web sitehas plenty to offer to anyone interested in biodiversity.

  3. Investigative negotiation.

    PubMed

    Malhotra, Deepak; Bazerman, Max H

    2007-09-01

    Negotiators often fail to achieve results because they channel too much effort into selling their own position and too little into understanding the other party's perspective. To get the best deal -or, sometimes, any deal at al--egotiators need to think like detectives, digging for information about why the other side wants what it does. This investigative approach entails a mind-set and a methodology, say Harvard Business School professors Malhotra and Bazerman. Inaccurate assumptions about the other side's motivations can lead negotiators to propose solutions to the wrong problems, needlessly give away value, or derail deals altogether. Consider, for example, the pharmaceutical company that deadlocked with a supplier over the issue of exclusivity in an ingredient purchase. Believing it was a ploy to raise the price, the drugmaker upped its offer--unsuccessfully. In fact, the supplier was balking because a relative's company needed a small amount of the ingredient to make a local product. Once the real motivation surfaced, a compromise quickly followed. Understanding the other side's motives and goals is the first principle of investigative negotiation. The second is to figure out what constraints the other party faces. Often when your counterpart's behavior appears unreasonable, his hands are tied somehow, and you can reach agreement by helping overcome those limitations. The third is to view onerous demands as a window into what the other party prizes most--and use that information to create opportunities. The fourth is to look for common ground; even fierce competitors may have complementary interests that lead to creative agreements. Finally, if a deal appears lost, stay at the table and keep trying to learn more. Even if you don't win, you can gain insights into a customer's future needs, the interests of similar customers, or the strategies of competitors. PMID:17886485

  4. Death Investigation Certificate

    E-print Network

    Saldin, Dilano

    Death Investigation Certificate What is Death Investigation? Medico-legal death investigation in death investigation in different ways. The study of death investigation trains students to identify and assemble a set of investigative tasks that are performed at every death scene. Modern medico- legal death

  5. Success with Investigations.

    ERIC Educational Resources Information Center

    Chin, Christine

    2003-01-01

    Describes strategies for facilitating student science investigations and alleviating common weaknesses associated with student performance. Includes checklist criteria for performance on investigative tasks and an example of an assessment rubric for the investigation of the effect of temperature on enzyme activity. (Author/KHR)

  6. Magsat scientific investigations

    NASA Technical Reports Server (NTRS)

    Langel, R. A.

    1980-01-01

    The Magsat spacecraft is providing the first global, vector magnetic survey. Investigations using the Magsat data are being carried out by scientists at NASA's Goddard Space Flight Center, at the U.S. Geological Survey of the Department of the Interior and by 32 selected investigators. Nineteen of the investigators are from the United States and 13 are from various foreign nations. The investigations described fall into four categories; (1) geomagnetic field modeling; (2) crustal magnetic anomaly studies; (3) investigations of the inner Earth: the core, mantle and core-mantle interface; and (4) studies of external current systems.

  7. Investigating the Ocean

    NSDL National Science Digital Library

    A collection of inquiry-based lessons using data from the web site of the National Oceanic and Atmospheric Administration/National Environmental Satellite, Data, and Information Service (NOAA/NESDIS). The lessons help students understand issues involving weather and our oceans, using current satellite data. Goals are to identify questions and concepts guiding scientific investigation; design and conduct scientific investigations; and use technology to improve investigations and communications.

  8. Investigating Encrypted Material

    NASA Astrophysics Data System (ADS)

    McGrath, Niall; Gladyshev, Pavel; Kechadi, Tahar; Carthy, Joe

    When encrypted material is discovered during a digital investigation and the investigator cannot decrypt the material then s/he is faced with the problem of how to determine the evidential value of the material. This research is proposing a methodology of extracting probative value from the encrypted file of a hybrid cryptosystem. The methodology also incorporates a technique for locating the original plaintext file. Since child pornography (KP) images and terrorist related information (TI) are transmitted in encrypted format the digital investigator must ask the question Cui Bono? - who benefits or who is the recipient? By doing this the scope of the digital investigation can be extended to reveal the intended recipient.

  9. Ancillary investigations in uveitis

    PubMed Central

    Gupta, Vishali; Gupta, Amod

    2013-01-01

    Ancillary investigations are the backbone of uveitis work-up both for anterior and posterior segment diseases. They help in making the diagnosis, ruling out certain differential diagnosis and monitoring inflammation during the follow-up. This review aims to be an overview describing the role of commonly used investigations for uveitis. PMID:23803477

  10. Investigational Drug Steering Committee

    Cancer.gov

    The Investigational Drug Steering Committee collaborates with the NCI in the design and prioritization of early phase drug development trials conducted by the Experimental Therapeutics Clinical Trials Network (ETCTN) with agents for which NCI’s Cancer Therapy and Evaluation Program (CTEP) holds an Investigational New Drug (IND) application.

  11. Investigators The Stony Brook

    E-print Network

    Young Investigators Review The Stony Brook Reviews: Gene Therapy and Chemoselective Vector of Biology · The Department of Ecology and Evolution #12;3The Stony Brook Young Investigators Review, Fall of Technology Volume 3 Fall 2011 Features: Discovering Topology with Dr. John Milnor UNDERGRADUATE JOURNAL

  12. Investigations in Martian Sedimentology

    NASA Technical Reports Server (NTRS)

    Moore, Jeffrey M.

    1998-01-01

    The purpose of this report is to investigate and discuss the Martian surface. This report was done in specific tasks. The tasks were: characterization of Martian fluids and chemical sediments; mass wasting and ground collapse in terrains of volatile-rich deposits; Mars Rover terrestrial field investigations; Mars Pathfinder operations support; and Martian subsurface water instrument.

  13. Crime Scene Investigation.

    ERIC Educational Resources Information Center

    Harris, Barbara; Kohlmeier, Kris; Kiel, Robert D.

    Casting students in grades 5 through 12 in the roles of reporters, lawyers, and detectives at the scene of a crime, this interdisciplinary activity involves participants in the intrigue and drama of crime investigation. Using a hands-on, step-by-step approach, students work in teams to investigate a crime and solve a mystery. Through role-playing…

  14. Investigating Perception and Illusion

    NSDL National Science Digital Library

    John Eichinger

    2009-05-30

    For a motivating and baffling experience, try this investigation of perceptual illusions and their causes. It allows students to observe, analyze, and compare a variety of optical illusions, and also to create their own optical illusions with pencil, pain

  15. Expanded Access Investigational (Test)

    E-print Network

    Puglisi, Joseph

    investigational drugs, biologics and devices requires IRB approval and must follow FDA regulations circumstances regarding expanded access at Stanford Stanford University Research Compliance Office For more information contact: Food and Drug Administration 186618663004374 or 13017968240 www.fda

  16. Investigating Neighborhood Wetlands

    NSDL National Science Digital Library

    Tim Shulstad, Lincoln Elementary School, Alexandria, MN, based on The Nature of Science and Engineering, an original activity created by Molly Stoddard, Prairie Wetlands Learning Center, Fergus Falls, MN.

    This activity is field investigation where students map a neighborhood wetland and generate various watershed questions. Students identify engineered structures in or around this wetland and consider how flood water can be controlled.

  17. Access to Investigational Drugs

    Cancer.gov

    A fact sheet that defines investigational drugs (drugs under study but not yet FDA approved) and describes the special conditions under which patients and their doctors can apply to receive these treatments.

  18. WETLAND DETECTION METHODS INVESTIGATION

    EPA Science Inventory

    The purpose of this investigation was to research and document the application of remote sensing technology for wetlands detection. arious sensors and platforms are evaluated for: suitability to monitor specific wetland systems; effectiveness of detailing wetland extent and capab...

  19. Student Investigations Using Chromatography

    ERIC Educational Resources Information Center

    Witters, Weldon L.; Bush, Kenneth

    1970-01-01

    Three different problems are given for student investigation in determining amino acid compositions, floral pigments, and water soluble amino acids by using the techniques of Roll Chromotography, DISC Chromotography, Thin Layer, and Paper Chromotography. (BR)

  20. Access to Investigational Drugs

    MedlinePLUS

    ... drugs include mechanisms such as an expanded access protocol or a special or compassionate exception. The sponsor ... Expanded Access The purpose of an expanded access protocol is to make investigational drugs that have significant ...

  1. Skylab EREP Investigations Summary

    NASA Technical Reports Server (NTRS)

    Pierson, W. J. (editor)

    1978-01-01

    The problems in the areas of agriculture, range and forestry; land use and cartography; geology and hydrology; oceans atmosphere, and data analysis techniques were investigated and summarized using Earth Resources Experiment Package (EREP) data.

  2. Old Faithful Plumbing Investigation

    NSDL National Science Digital Library

    Twin Cities Public Television, Inc.

    2007-01-01

    This activity (located on page 3 of the PDF) is a full inquiry investigation into mapping the underground “plumbing” of geysers. Groups of learners will mimic an actual investigation into the underground plumbing of Old Faithful by dividing into groups, designing a plumbing system to hide in a cardboard box, then testing other boxes with a probe and making sketches of the hidden plumbing based on their observations. Relates to linked video, DragonflyTV GPS: Geysers.

  3. Journal of Investigative Dermatology

    NSDL National Science Digital Library

    Stanford University's HighWire Press has available this online journal. The Journal of Investigative Dermatology (JID), provided by the Society for Investigative Dermatology and the European Society for Dermatological Research, publishes "original research relevant to all aspects of cutaneous biology and skin disease." Online content includes full text and figures beginning July 1999 (Vol 113, No 1); abstracts are online from January 1975 (Vol 64, No 1), and .pdf files are available from January 1996 (Vol 106, No 1).

  4. NASA guest investigators

    NASA Astrophysics Data System (ADS)

    The National Aeronautics and Space Administration (NASA) is now seeking guest investigators to participate in the International Sun-Earth Explorer (ISEE) and International Cometary Explorer (ICE) programs. The ISEE/ICE project is a joint NASA/European Space Agency (ESA) venture. A budget of approximately $500,000 to support the ISEE/ICE Guest Investigator Program is expected for fiscal year 1985, and a similar amount is expected for FY 1986.Although NASA welcomes proposals at any time, proposals must be received by mid-October in order to be considered in the initial selection. Those arriving after mid-November may be held for another selection period.

  5. Systems special investigation group

    NASA Technical Reports Server (NTRS)

    1991-01-01

    An interim report concerning the Long Duration Exposure Facility (LDEF) is presented by a Boeing Systems special investigation group (SIG). The SIG activities were divided into five engineering disciplines: electrical, mechanical, optics, thermal, and batteries/solar cells. The responsibilities of the SIG included the following areas: support de-integration at Kennedy Space Center (KSC); testing of hardware at Boeing; review of principal investigator (PI) test plans and test results; support of test activities at PI labs; and collation of all test results into the SIG database.

  6. Investigating Nitrogen Dioxide

    NSDL National Science Digital Library

    Students will investigate Nitrogen Dioxide levels in the atmosphere during a one year time span using data sets from MyNASAData website. They will draw conclusions about what factors around the world effect NO2 levels (season, population, industry, etc.)

  7. Seasonal Change Investigations

    ERIC Educational Resources Information Center

    Smith, Wendy

    2009-01-01

    The author describes how the yearlong Investigating Seasonal Change at North Ponds project enabled third-grade students to take on the role of environmental scientists, recording and analyzing environmental data from ponds near their school. The students used an array of technological tools to explore and report on the causes and effects of…

  8. Investigations into Character Enhancement.

    ERIC Educational Resources Information Center

    Hartoonian, H. Michael

    2001-01-01

    Presents six different investigations of character enhancement that attempts to answer three questions: (1) who are you; (2) what is your destination; and (3) who is your captain? Intends to build relationships among ideas such as perspective taking, seeing and making connections with the other, and understanding more about ethical development.…

  9. SCI: Skin Cancer Investigation

    NSDL National Science Digital Library

    American Association for the Advancement of Science (AAAS; )

    2010-05-26

    Skin Care Investigations offers students the chance to learn more about skin and skin cancer before entering the virtual world of Glowell Clinic, where they will spend time at the helpdesk answering callers' questions about skin protection and in the laboratory assessing whether skin abnormalities are cancerous or not. An interactive assessment allows students and teachers to gauge understanding at this level.

  10. Fire investigation handbook

    Microsoft Academic Search

    F. L. Brannigan; R. G. Bright; N. H. Jason

    1980-01-01

    The handbook is a reference tool designed to be used by the beginning or by the experienced fire investigator. How each person uses this book will depend upon a particular need and level of experience. The broad areas covered are: fire ground procedures; post fire interviews; the building and its makeup; ignition sources; the chemistry and physics of fire and

  11. Tribological InvestigationsUsing

    E-print Network

    Tribological InvestigationsUsing FrictionForce Microscopy R. Overneyand E. Meyer ~ Introduction with the sci- ence of interacting material interfaces in relative motion: tribology.The stateof the art in tribology induced the theorists to con- sider the sliding bodies as spring models creating phonon

  12. Soil, An Environmental Investigation.

    ERIC Educational Resources Information Center

    National Wildlife Federation, Washington, DC.

    This environmental unit is one of a series designed for integration within an existing curriculum. The unit is self-contained and requires minimal teacher preparation. The philosophy of the series is based on an experience-oriented process that encourages self-paced independent student work. This particular unit investigates soil in relation to…

  13. Investigating Ocean Pollution.

    ERIC Educational Resources Information Center

    LeBeau, Sue

    1998-01-01

    Describes a fifth-grade class project to investigate two major forms of ocean pollution: plastics and oil. Students work in groups and read, discuss, speculate, offer opinions, and participate in activities such as keeping a plastics journal, testing the biodegradability of plastics, and simulating oil spills. Activities culminate in…

  14. Investigating Chromatography: selecting variables

    NSDL National Science Digital Library

    Nancy Gerber

    This activity is a classroom investigation where students separate pigment in dyes in order to learn about mixtures and solutions. They use chromatography to design and experiment with a single variable to answer a question about which ink will separate the most - has the greatest variety of pigment.

  15. Acid Rain Investigations.

    ERIC Educational Resources Information Center

    Hugo, John C.

    1992-01-01

    Presents an activity in which students investigate the formation of solid ammonium chloride aerosol particles to help students better understand the concept of acid rain. Provides activity objectives, procedures, sample data, clean-up instructions, and questions and answers to help interpret the data. (MDH)

  16. Hypnosis in criminal investigation

    Microsoft Academic Search

    William S. Kroger; Richard G. Douce

    1979-01-01

    Hypnosis has been of value in providing investigative direction and, in the cases described, has led to the solutions of major crimes. The present authors have described the methodology of our team approach which was used in 23 cases comprised of 53 witnesses. New information was developed in more than 60% of the cases utilizing hypnosis. Although only a small

  17. The Polar Insulation Investigation

    ERIC Educational Resources Information Center

    Urban-Rich, Juanita

    2006-01-01

    In this article, the author developed an activity called "The Polar Insulation Investigation." This activity builds on students' natural interest in "things polar" and introduces them to animal adaptations in a unique way. The aim of the exploration is to determine the role of animal coverings (e.g., blubber, fur, and feathers) and to see which is…

  18. Investigating Your Health.

    ERIC Educational Resources Information Center

    Miller, Benjamin F.; And Others

    This textbook is directed to higher secondary school students and presents general health concerns in a student-centered, active learning approach. Each unit provides unsolved problems for the student to investigate; each chapter contains one or more projects for student participation, a chapter summary, and an annotated list of additional reading…

  19. Investigation of semiconductors

    NSDL National Science Digital Library

    Lynne Shenk

    This investigation involves a web quest and simulation to help students learn about the make-up and functioning of semiconductors as well as some applications. They will learn about p and n type materials, the pn junction, and what happens when an outside EMF source is added.

  20. Understanding the Antitrust Investigation.

    ERIC Educational Resources Information Center

    AGB Reports, 1990

    1990-01-01

    The Department of Justice has issued civil investigative demands to some colleges and universities. The demands require institutions to submit information on how they set tuition, fees, faculty and administration salaries, and financial aid awards. A rebuttal explains that the overlap group (23 northeast colleges) meet regularly to ensure…

  1. Composting: A Scientific Investigation

    NSDL National Science Digital Library

    California Academy of Sciences

    2008-01-01

    In this activity, learners conduct a scientific investigation involving decomposition and discover that the life cycle of trash is affected by its organic or inorganic nature. Learners develop questions, hypothesize, and record observations in compost workbooks throughout the seven-week experiment. This detailed lesson guide includes key vocabulary, background information, wrap-up and extension ideas, and resources.

  2. Clinical Investigations Branch (CIB)

    Cancer.gov

    Meg Mooney, MD, MBA is the Chief of the Clinical Investigations Branch (CIB) of the Cancer Therapy Evaluation Program (CTEP), Division of Cancer Treatment and Diagnosis, at the NCI and oversees adult sarcoma cancer therapeutics. She was formerly the Interim Director of the Office of Evidence-Based Surgery at the American College of Surgeons in Chicago, Illinois.

  3. Biosurveillance in outbreak investigations.

    PubMed

    Kaydos-Daniels, S Cornelia; Rojas Smith, Lucia; Farris, Tonya R

    2013-03-01

    Following the terrorist attacks of September 11 and the anthrax attacks in 2001, public health entities implemented automated surveillance systems based on disease syndromes for early detection of bioterror events and to increase timeliness of responses. Despite widespread adoption, syndromic surveillance systems' ability to provide early notification of outbreaks is unproven, and there is little documentation on their role in outbreak response. We hypothesized that biosurveillance is used in practice to augment classical outbreak investigations, and we used case studies conducted in 2007-08 to determine (1) which steps in outbreak investigations were best served by biosurveillance, and (2) which steps presented the greatest opportunities for improvement. The systems used in the case studies varied in how they functioned, and there were examples in which syndromic systems had identified outbreaks before other methods. Biosurveillance was used successfully for all steps of outbreak investigations. Key advantages of syndromic systems were sensitivity, timeliness, and flexibility and as a source of data for situational awareness. Limitations of biosurveillance were a lack of specificity, reliance on chief complaint data, and a lack of formal training for users. Linking syndromic data to triage notes and medical chart data would substantially increase the value of biosurveillance in the conduct of outbreak investigations and reduce the burden on health department staff. PMID:23448272

  4. Spanish Literacy Investigation Project.

    ERIC Educational Resources Information Center

    Cook, Jacqueline; Quinones, Anisia

    The Spanish Literacy Investigation Project was implemented to identify adult Spanish literacy programs throughout the country, to explore the availability of relevant Spanish literacy teaching methods, to determine relevant elements between Spanish literacy and English as a Second Language (ESL), and to describe a model for incorporating a Spanish…

  5. Investigating Magnetic Force Fields

    NSDL National Science Digital Library

    Daryl ("Tish") Monjeau, Bancroft Elementary School, Minneapolis, MN

    2012-03-18

    In this classroom activity, the students will investigate the magnetic pull of a bar magnet at varying distances with the use of paper clips. Students will hypothesize, conduct the experiment, collect the data, and draw conclusions that support their data. Each student will record the experiment and their findings in their science journals. As a class, students will compare each groups' data and their interpretation of the results.

  6. Cassini Plasma Spectrometer Investigation

    Microsoft Academic Search

    D. T. Young; J. J. Berthelier; M. Blanc; J. L. Burch; A. J. Coates; R. Goldstein; M. Grande; T. W. Hill; R. E. Johnson; V. Kelha; D. J. Mccomas; E. C. Sittler; K. R. Svenes; K. Szegö; P. Tanskanen; K. Ahola; D. Anderson; S. Bakshi; R. A. Baragiola; B. L. Barraclough; R. K. Black; S. Bolton; T. Booker; R. Bowman; P. Casey; F. J. Crary; D. Delapp; G. Dirks; N. Eaker; H. Funsten; J. D. Furman; J. T. Gosling; H. Hannula; C. Holmlund; H. Huomo; J. M. Illiano; P. Jensen; M. A. Johnson; D. R. Linder; T. Luntama; S. Maurice; K. P. Mccabe; K. Mursula; B. T. Narheim; J. E. Nordholt; A. Preece; J. Rudzki; A. Ruitberg; K. Smith; S. Szalai; M. F. Thomsen; K. Viherkanto; J. Vilppola; T. Vollmer; T. E. Wahl; M. Wüest; T. Ylikorpi; C. Zinsmeyer

    2004-01-01

    The Cassini Plasma Spectrometer (CAPS) will make comprehensive three-dimensional mass-resolved measurements of the full variety of plasma phenomena found in Saturn’s magnetosphere. Our fundamental scientific goals are to understand the nature of saturnian plasmas primarily their sources of ionization, and the means by which they are accelerated, transported, and lost. In so doing the CAPS investigation will contribute to understanding

  7. DTP - NCI Investigational Drugs

    Cancer.gov

    This edition of NCI Investigational Drugs - Chemical Information is designed to provide those involved in various phases of drug development with chemical and physical data on compounds which are past or current development candidates in the Developmental Therapeutics Program, Division of Cancer Treatment Diagnosis and Centers, National Cancer Institute. These range from agents which have only just entered the development pipeline to those which are available commercially.

  8. Volcanic Material Catapult Investigation

    NSDL National Science Digital Library

    Twin Cities Public Television, Inc.

    2007-01-01

    This activity (located on page 3 of the PDF) is a full inquiry investigation into the relationship between an object’s mass and the distance it is thrown by a catapult. Groups of learners will assemble a simple plastic spoon catapult and test launch “tephra” (material ejected from volcanoes) of different masses, calculate average throwing distance and graph their recorded results. Relates to linked video, DragonflyTV GPS: Lava Flow.

  9. Genesis Failure Investigation Report

    NASA Technical Reports Server (NTRS)

    Klein, John

    2004-01-01

    The-Genesis mission to collect solar-wind samples and return them to Earth for detailed analysis proceeded successfully for 3.5 years. During reentry on September 8, 2004, a failure in the entry, descent and landing sequence resulted in a crash landing of the Genesis sample return capsule. This document describes the findings of the avionics sub-team that supported the accident investigation of the JPL Failure Review Board.

  10. STS investigators' guide

    NASA Technical Reports Server (NTRS)

    1989-01-01

    The capability of the Space Transportation System (STS), the Space Shuttle, to support crew tended and free flyer research in low Earth orbit has opened new possibilities for science in space. For the first time, research equipment can be put into orbit routinely, operated in either a shirtsleeve environment or exposed to space, and then returned to the investigator. NASA, operator of the Shuttle, has implemented a variety of programs to ensure that anyone with a worthy research idea can take advantage of this opportunity. Investigators ranging from high school students to renowned space scientists have already used the Shuttle as a platform for making Earth, atmospheric, and astronomical observations; for performing space plasma physics measurements; and for exploring the effects of microgravity on living organisms and physical processes. For investigators considering a flight experiment for the first time, this guide explains what the Shuttle has to offer, how to arrange to fly an experiment, and what to expect once preparations for the flight are under way.

  11. The Polar Insulation Investigation

    NSDL National Science Digital Library

    Juanita Urban-Rich

    2006-10-01

    In this article an oceanographer discusses her development of an activity to help students explore polar-related questions more fully. "The Polar Insulation Investigation" builds on students' natural interest in "things polar" and introduces them to animal adaptations in a unique way. The aim of the exploration is to determine the role of animal coverings (e.g. blubber, fur, and feathers) and to see which is the best insulator. It also provides an opportunity to develop and practice skills for measuring temperature.

  12. Taxonomic investigations of mallomonas 

    E-print Network

    Marquis, Sara Ann

    1977-01-01

    dist ih ti of tl. fs d t y h 1i ited to North America. ~gescri tio . ih 11igticei ce11 of h. s d co o t is 25-30 x 15-18 pm. The seal es are 4-5 x 3-4 pm and are of two types. The imbricated scales appear to be arranged such that anterior scales... spine. Two methods of transmission electron microscopy are useful in the study of Mallomonas. These are 1) direct electron micrographs of the scale itself and 2) carbon replicas. Initial investigations are based on direct electron micrographs...

  13. Microwave radar oceanographic investigations

    NASA Technical Reports Server (NTRS)

    Jackson, F. C.

    1988-01-01

    The Radar Ocean Wave Spectrometer (ROWS) technique was developed and demonstrated for measuring ocean wave directional spectra from air and space platforms. The measurement technique was well demonstrated with data collected in a number of flight experiments involving wave spectral comparisons with wave buoys and the Surface Contour Radar (SCR). Recent missions include the SIR-B underflight experiment (1984), FASINEX (1986), and LEWEX (1987). ROWS related activity is presently concentrating on using the aircraft instrument for wave-processes investigations and obtaining the necessary support (consensus) for a satellite instrument development program. Prospective platforms include EOS and the Canadian RADARSAT.

  14. VAB Sway Investigation

    NASA Technical Reports Server (NTRS)

    Youngquist, Robert c.; Ihlefeld, Curtis M.; Lane, John E.; Starr, Stanley O.

    2013-01-01

    The Vehicle Assembly Building (VAB) was constructed in the mid-1960s to house the Saturn V moon rocket while it was being assembled. Designed to withstand hurricanes and tropical storms, the V AB has a foundation consisting of 30,000 cubic yards of concrete strengthened by 4,225 steel rods driven 160 feet into limestone bedrock. The goal of the VAB Sway Investigation, which began collecting data in April 201 0 and ended in November 2012, was to quantify the displacement or sway of the VAB as a function of wind loading.

  15. Radar Investigations of Asteroids

    NASA Technical Reports Server (NTRS)

    Ostro, S. J.

    1984-01-01

    Radar investigations of asteroids, including observations during 1984 to 1985 of at least 8 potential targets and continued analyses of radar data obtained during 1980 to 1984 for 30 other asteroids is proposed. The primary scientific objectives include estimation of echo strength, polarization, spectral shape, spectral bandwidth, and Doppler shift. These measurements yield estimates of target size, shape, and spin vector; place constraints on topography, morphology, density, and composition of the planetary surface; yield refined estimates of target orbital parameters; and reveals the presence of asteroidal satellites.

  16. Manual on Subsurface Investigation

    NSDL National Science Digital Library

    A series of twelve modules that constitute a comprehensive training course in geotechnical and foundation engineering. Sponsored by the National Highway Institute (NHI) of the Federal Highway Administration (FHWA), the training course is given at different locations in the U.S. The intended audience includes civil engineers and engineering geologists involved in the design and construction of transportation facilities. This manual is designed to present the latest methodologies in the planning,execution and interpretation of the various subsurface investigation methods, and the development of appropriate soil and rock parameters for engineering applications

  17. Bearing fatigue investigation 3

    NASA Technical Reports Server (NTRS)

    Nahm, A. H.; Bamberger, E. N.; Signer, H. R.

    1982-01-01

    The operating characteristics of large diameter rolling-element bearings in the ultra high speed regimes expected in advanced turbine engines for high performance aircraft were investigated. A high temperature lubricant, DuPont Krytox 143 AC, was evaluated at bearing speeds to 3 million DN. Compared to the results of earlier, similar tests using a MIL-L-23699 (Type II) lubricant, bearings lubricated with the high density Krytox fluid showed significantly higher power requirements. Additionally, short bearing lives were observed when this fluid was used with AISI M50 bearings in an air atmosphere. The primary mode of failure was corrosion initiated surface distress (fatigue) on the raceways. The potential of a case-carburized bearing to sustain a combination of high-tangential and hertzian stresses without experiencing race fracture was also investigated. Limited full scale bearing tests of a 120 mm bore ball bearing at a speed of 25,000 rpm (3 million DN) indicated that a carburized material could sustain spalling fatigue without subsequent propagation to fracture. Planned life tests of the carburized material had to be aborted, however, because of apparent processing-induced material defects.

  18. Hypertext structures for investigative teams

    Microsoft Academic Search

    Rasmus Rosenqvist Petersen; Uffe Kock Wiil

    2011-01-01

    Investigations such as police investigations, intelligence analysis, and investigative journalism involves a number of complex knowledge management tasks. Investigative teams collect, process, and analyze information related to a specific target to create products that can be disseminated to their customers. This paper presents a novel hypertext-based tool that supports a human-centered, target-centric model for investigative teams. The model divides investigative

  19. Columbia Accident Investigation Board

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Columbia Accident Investigation Board gathers for a second day for its third public hearing, held in Cape Canaveral, Florida. The CAIB was set up to examine STS-107 and analyze exploratory tests. Navy Admiral Harold W. 'Hal' Gehman Jr. was designated as the Chairman of the Board. From left to right in this photo sit Board Members Steven B. Wallace, Scott Hubbard, Dr. John Logsdon, Rear Admiral Stephen Turcotte, Hal Gehman, General Duane Deal, Dr. Douglas Osheroff, and Maj. General Kenneth W. Hess. Not shown are Maj. General John Barry, Dr. James N. Hallock, Roger Tetrault, Dr. Sheila Widnall, and Dr. Sally Ride. For more information on STS-107, please see GRIN Columbia General Explanation

  20. Investigations of lunar materials

    NASA Technical Reports Server (NTRS)

    Comstock, G. M.; Fvwaraye, A. O.; Fleischer, R. L.; Hart, H. R., Jr.

    1972-01-01

    The investigations were directed at determining the radiation history and surface chronology of lunar materials using the etched particle track technique. The major lunar materials studied are the igneous rocks and double core from Apollo 12, the breccia and soil samples from Apollo 14, and the core samples from Luna 16. In the course of this work two new and potentially important observations were made: (1) Cosmic ray-induced spallation-recoil tracks were identified. The density of such tracks, when compared with the density of tracks induced by a known flux of accelerator protons, yields the time of exposure of a sample within the top meter or two of moon's surface. (2) Natural, fine scale plastic deformation was found to have fragmented pre-existing charged particle tracks, allowing the dating of the mechanical event causing the deformation.

  1. Rosetta Radio Science Investigations

    NASA Technical Reports Server (NTRS)

    Patzold, M.; Neubauer, F. M.; Wennmacher, A.; Aksnes, K.; Anderson, J. D.; Asmar, S. W.; Tinto, M.; Tsurutani, B. T.; Yeomans, D. K.; Barriot, J. -P.; Bird, M. K.; Boehnhardt, H.; Gill, E.; Montenbruck, O.; Grun, E.; Hausler, B.; Ip, W. H.; Thomas, N.; Marouf, E. A.; Rickman, H.; Wallis, M. K.; Wickramasinghe, N. C.

    1996-01-01

    The Rosetta Radio Science Investigations (RSI) experiment was selected by the European Space Agency to be included in the International Rosetta Mission to comet P/Wirtanen (launch in 2003, arrival and operational phase at the comet 2011-2013). The RSI science objectives address fundamental aspects of cometary physics such as the mass and bulk density of the nucleus, the gravity field, non-gravitational forces, the size and shape, the internal structure, the composition and roughness of the nucleus surface, the abundance of large dust grains and the plasma content in the coma and the combined dust and gas mass flux on the orbiter. RSI will make use of the radio system of the Rosetta spacecraft.

  2. Vitamin D Investigation

    NASA Technical Reports Server (NTRS)

    1986-01-01

    The solar dosimeter, a spinoff from NASA solar cell technology, measures the amount of solar radiation to which its wearer is exposed. It was used in a University of Cincinnati Medical Center investigation into the effect of sunlight exposure on maintaining vitamin D status in infants. The infants were exposed to sunlight and records were kept by mothers. Each baby wore a solar dosimeter. The two circular "eyes" in the instrument are silicon photovoltaic detectors which collect solar energy, convert it to electric signals and transmit the charge to E-cells that record the charge by plating silver ions onto an electrode. The time required to plate the silver measures the radiation received. The University found the solar dosimeter to be very effective.

  3. Pellet detector investigation

    SciTech Connect

    Jones, R.P.; Starrett, W.A. (BICC Cables Corp., Indianapolis, IN (United States))

    1991-10-01

    The presence of voids and contaminants in the extruded polyethylene insulation of distribution cable can cause premature cable failure. A recent EPRI investigation sought to use an experimental far-infrared laser (FIRL) to identify impurities in cable insulation manufactured from specially inspected pellets. 15 kV XLPE cables were made from three lots of insulation material which had been scanned 0%, 2% and 100% by a pellet inspection device. The cables were then examined with the FIRL (Far Infrared Laser Instrument for Cable Inspection). The 0% inspected cable had more defect indications on the FIRL, appeared dirtier and had the roughest surface of three cables. However, AC breakdown tests on unaged and aged (30 and 90 days) cables failed to reveal any statistically significant differences between cables made with the three lots of material. 10 figs., 6 tabs.

  4. Dynamic airfoil stall investigations

    NASA Technical Reports Server (NTRS)

    Platzer, M. F.; Chandrasekhara, M. S.; Ekaterinaris, J. A.; Carr, L. W.

    1992-01-01

    Experimental and computational investigations of the dynamic stall phenomenon continue to attract the attention of various research groups in the major aeronautical research laboratories. There are two reasons for this continued research interest. First, the occurrence of dynamic stall on the retreating blade of helicopters imposes a severe performance limitation and thus suggests to search for ways to delay the onset of dynamic stall. Second, the lift enhancement prior to dynamic stall presents an opportunity to achieve enhanced maneuverability of fighter aircraft. A description of the major parameters affecting dynamic stall and lift and an evaluation of research efforts prior to 1988 has been given by Carr. In this paper the authors' recent progress in the development of experimental and computational methods to analyze the dynamic stall phenomena occurring on NACA 0112 airfoils is reviewed. First, the major experimental and computational approaches and results are summarized. This is followed by an assessment of our results and an outlook toward the future.

  5. Investigations on laser thermokeratoplasty

    NASA Astrophysics Data System (ADS)

    Brinkmann, Ralf; Koop, Norbert; Droege, Gerit; Grotehusmann, Ulf; Huber, Andrea; Birngruber, Reginald

    1994-02-01

    Homogeneous deep intrastromal coagulations are thought to be optical for effective laser thermokeratoplasty. We therefore investigated the thermal effects created by two different flashlamp-pumped IR lasers (Er:glass and Cr:Tm:Ho:YAG) as well as two different application modalities (direct fiber contact and intrastromal focusing). The physical and thermal parameters of corneal tissue and the threshold temperatures for corneal collagen denaturation in different time domains were determined using a water bath and IR laser radiation. The temperature required to coagulate corneal tissue in the millisecond time regime was found to be above 100 degrees C. Based on these results a thermal model was developed to calculate temperature profiles and coagulation zones in space and time for different exposures situations. Model calculations show the possibility to induce deep stromal effects with a spatially nearly homogeneous temperature distribution within the application volume while minimizing adverse effects in the corneal endothelium.

  6. Microflora investigation experiment.

    PubMed

    Harada, K

    2001-10-01

    Many microorganisms were isolated from condensed water, wiping and scratching of cabin wall and air sampler in Russian space station Mir by Russian astronauts Lazutkin et al. in February 1997 as part of NASDA "First MIR Utilization Space Experiment (JMIR)". For example, there were about 2 x 10(6) cells/ml in condensed water sample No. 1 isolated from the transfer-docking compartment of Crystal module. We tried the colony isolation, pure culturing and identification from these sampled microorganisms. After the bacteria separated from filamentous fungi and yeasts were observed using the phase contrast optical microscopy and gram stain method, twenty-one kinds of biochemical characters, e.g., oxidase test, activity of beta-galactosidase and fermentation of glucose etc., were investigated on the isolated bacteria. Then, we found Serratia liquefaciens and Yersinia enterocolitica and the chemoheterotroph Pseudomonadaceae, Stenotrophomonas maltophila. Furthermore, using ultraviolet (UV) lamp we tried the isolation of radioresistant bacteria, we found the radioresistant Sphingomonas paucimobilis (90.8% identification) by comparing with radioresistant Escherichia coli B/r strain. Considering Mir environment under cosmic radiation, this radioresistant S. paucimobilis might be the mutant from radiosensitive one. Following papers were published [see text]. PMID:11799257

  7. The Dawn Topography Investigation

    NASA Technical Reports Server (NTRS)

    Raymond, C. A.; Jaumann, R.; Nathues, A.; Sierks, H.; Roatsch, T.; Preusker, E; Scholten, F.; Gaskell, R. W.; Jorda, L.; Keller, H.-U.; Zuber, M. T.; Smith, D. E.; Mastrodemos, N.; Mottola, S.

    2011-01-01

    The objective of the Dawn topography investigation is to derive the detailed shapes of 4 Vesta and 1 Ceres in order to create orthorectified image mosaics for geologic interpretation, as well as to study the asteroids' landforms, interior structure, and the processes that have modified their surfaces over geologic time. In this paper we describe our approaches for producing shape models, plans for acquiring the needed image data for Vesta, and the results of a numerical simulation of the Vesta mapping campaign that quantify the expected accuracy of our results. Multi-angle images obtained by Dawn's framing camera will be used to create topographic models with 100 m/pixel horizontal resolution and 10 m height accuracy at Vesta, and 200 m/pixel horizontal resolution and 20 m height accuracy at Ceres. Two different techniques, stereophotogrammetry and stereophotoclinometry, are employed to model the shape; these models will be merged with the asteroidal gravity fields obtained by Dawn to produce geodetically controlled topographic models for each body. The resulting digital topography models, together with the gravity data, will reveal the tectonic, volcanic and impact history of Vesta, and enable co-registration of data sets to determine Vesta's geologic history. At Ceres, the topography will likely reveal much about processes of surface modification as well as the internal structure and evolution of this dwarf planet.

  8. The Kepler Asteroseismic Investigation

    NASA Astrophysics Data System (ADS)

    Kjeldsen, Hans

    2011-01-01

    The aim of asteroseismology is to probe the interiors of stars and quantify their properties, such as radius, mass, rotation and age, through observations of oscillation modes. Using the ultrahigh photometric precision and the extended length of the time series from Kepler one can perform asteroseismology which is orders of magnitudes more accurate than one could do just a few years ago. The Kepler asteroseismic programme is being conducted through the Kepler Asteroseismic Science Consortium (KASC), whose 400 members are organized into 13 working groups (KASC WGs) by type of variable star. The KASC WGs are established to ensure an efficient and structured work within KASC focusing on data analysis, stellar modelling and publication of data. The goals of the asteroseismic part of the Kepler project are to perform detailed studies of stellar interiors and to support the exoplanet investigation by measuring accurate stellar properties, especially the radius of planet host stars. The first results of the asteroseismic analysis indicate how the future analysis of Kepler data for many types of stars will impact our general understanding of stellar structure and evolution. A series of the most fascinating results from the asteroseismic analysis of Kepler data will be presented.

  9. Abyssal soil investigation equipment

    SciTech Connect

    Smits, F.P.; Maggioni, W.; Mainardi, U. [ISMES, Bergamo (Italy)

    1994-12-31

    The present paper deals with the development of a testing device for quick offshore geotechnical investigations. The equipment, at present, consists of a penetrometer, mounted on a sea bed platform, a handling frame and a control cabin; a further development includes a drill rig and a geotechnical laboratory. All this is designed so as to be an autonomous unit that can be handled by various types of non-specialized ships which have the necessary deck space. The sea bed platform can operate in 2,000 m of waterdepth and is provided with a hydraulic penetrometer, with a thrust capacity of 400 kN, able to carry out cone penetration type testing until a depth of more than 100 m, as well as shallow depth continuous sampling. The penetrometer can be equipped with a series of probes (piezocone, pressiocone, total radial pressure transducer, seismic cone) allowing the execution of the wide range of direct geotechnical measurements normally performed during on-land penetration tests.

  10. Ship Creek bioassessment investigations

    SciTech Connect

    Cushing, C.E.; Mueller, R.P.; Murphy, M.T.

    1995-06-01

    Pacific Northwest Laboratory (PNL) was asked by Elmendorf Air Force Base (EAFB) personnel to conduct a series of collections of macroinvertebrates and sediments from Ship Creek to (1) establish baseline data on these populations for reference in evaluating possible impacts from Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) activities at two operable units, (2) compare current population indices with those found by previous investigations in Ship Creek, and (3) determine baseline levels of concentrations of any contaminants in the sediments associated with the macroinvertebrates. A specific suite of indices established by the US Environmental Protection Agency (EPA) was requested for the macroinvertebrate analyses; these follow the Rapid Bioassessment Protocol developed by Plafkin et al. (1989) and will be described. Sediment sample analyses included a Microtox bioassay and chemical analysis for contaminants of concern. These analyses included, volatile organic compounds, total gasoline and diesel hydrocarbons (EPA method 8015, CA modified), total organic carbon, and an inductive-coupled plasma/mass spectrometry (ICP/MS) metals scan. Appendix A reports on the sediment analyses. The Work Plan is attached as Appendix B.

  11. Credible investigation of air accidents.

    PubMed

    Smart, K

    2004-07-26

    Within the United Kingdom the Air Accidents Investigation Branch (AAIB) has been used as a model for the other transport modes accident investigation bodies. Government Ministers considered that the AAIB's approach had established the trust of the public and the aviation industry in its ability to conduct independent and objective investigations. The paper will examine the factors that are involved in establishing this trust. They include: the investigation framework; the actual and perceived independence of the accident investigating body; the aviation industry's safety culture; the qualities of the investigators and the quality of their liaison with bereaved families those directly affected by the accidents they investigate. PMID:15231355

  12. Utility-Scale Solar Power Converter: Agile Direct Grid Connect Medium Voltage 4.7-13.8 kV Power Converter for PV Applications Utilizing Wide Band Gap Devices

    SciTech Connect

    None

    2012-01-25

    Solar ADEPT Project: Satcon is developing a compact, lightweight power conversion device that is capable of taking utility-scale solar power and outputting it directly into the electric utility grid at distribution voltage levels—eliminating the need for large transformers. Transformers “step up” the voltage of the power that is generated by a solar power system so it can be efficiently transported through transmission lines and eventually “stepped down” to usable voltages before it enters homes and businesses. Power companies step up the voltage because less electricity is lost along transmission lines when the voltage is high and current is low. Satcon’s new power conversion devices will eliminate these heavy transformers and connect a utility-scale solar power system directly to the grid. Satcon’s modular devices are designed to ensure reliability—if one device fails it can be bypassed and the system can continue to run.

  13. Biology. Student Investigations and Readings. Investigations in Natural Science.

    ERIC Educational Resources Information Center

    Renner, John W.; And Others

    Investigations in Natural Science is a program in secondary school biology, chemistry, and physics based upon the description of science as a quest for knowledge, not the knowledge itself. This student manual contains the 18 biology investigations. These investigations focus on concepts related to: organisms; classification; populations;…

  14. Artificial Selection Lab, Investigation #1

    NSDL National Science Digital Library

    AP Biology Investigative Labs: An Inquiry-Based Approach

    This is the 2012 inquiry-based Advanced Placement Investigation into Artificial Selection (#1). The investigation was developed by the College Board for use in AP Biology classes. This inquiry is guided by the question, Can extreme selection change expression of aquantitative trait in a population in one generation? Students study and carry out an artificial selection investigation using Wisconsin Fast Plants (Brassica rapa).

  15. I Investigation of Pellet Acceleration

    E-print Network

    I Investigation of Pellet Acceleration by an Arc heated Gas Gun An Interim Report INVESTIGATION OP PELLET ACCELERATION BY AN ARC HEATED GAS GUN* An Interim Report on the Investigations carried above those obtained so far. An experimental setup designed for a study of acceleration of 3 mm0 pellets

  16. GULF OF MEXICO PLANKTON INVESTIGATIONS,

    E-print Network

    GULF OF MEXICO PLANKTON INVESTIGATIONS, 1951-53 Marine Biological Laboratory! LIBKART WOODS HOLE OF MEXICO PLANKTON INVESTIGATIONS: 1951-53 by Edgar L. Arnold, Jr. Fishery Research Biologist Gulf Fishery, Edgar L Gulf of Mexico plankton investigations: 1951-53. Wash- ington, U. S. Dept. of the Interior, Fish

  17. PI Checklist -Initial Applications I. Principal Investigators (PI)/Investigators

    E-print Network

    PI Checklist - Initial Applications I. Principal Investigators (PI)/Investigators a. Contact. Complete Initial or renew human subjects training. Note: The PI must hold rank of Asst. Professor or higher or be granted waived - PI from IRB to submit an initial application. II. Project specific questions a. Is your

  18. Accessing and Investigating Population Data

    NSDL National Science Digital Library

    Grace M. Burton

    2000-01-01

    In this activity, students investigate population projections from 1990-2100 using data from the U.S. Census Bureau Web. Using the five specific population pyramids, students investigate population projection data for the United States over a 110-year period. They examine how the population data is distributed over time and explain what factors might contribute to these trends. An activity sheet and thoughtful questions, included in the lesson plan, guide the class investigation.

  19. Research News Clinical Investigation Center

    E-print Network

    Blanchette, Robert A.

    Research News Clinical Investigation Center Winter 2013 Advancing Veterinary and Human Medicine and to reduce tumor volume in various animal species. Study participants must meet the following criteria

  20. Enacting forensics in homicide investigations

    Microsoft Academic Search

    Robin Williams; Jason Weetman

    2012-01-01

    This article, co-authored by an academic and a forensic practitioner, describes some of the gaps in current knowledge of the utility of forensic science support to homicide investigations. It also reflects on the experience of a recent pilot study of the use of forensic science in homicide investigations in an English police force to argue for new kinds of research

  1. Community Investigations: Looking at Uncertainty.

    ERIC Educational Resources Information Center

    Kolbe, Tom

    1999-01-01

    Describes a three-year collaborative project, Investigating Our Community, involving teachers and fourth, fifth, and sixth graders. Focuses on moving from mandated curriculum that defines inquiry with known outcomes to inquiry that explores the unknown knowledge and stories of their school's neighborhood. Finds that a community investigation

  2. Rules of Procedure for Investigation.

    ERIC Educational Resources Information Center

    National Education Association, Washington, DC. Commission on Professional Rights and Responsibilities.

    Among the functions of the Commission on Professional Rights and Responsibilities of the NEA is the investigation of cases of alleged unethical conduct by members of the teaching profession. The rules of procedure for investigations presented in this document are intended to assure all parties in a conflict of their individual rights of procedural…

  3. Computer Forensics Investigators or Private Investigators: Who Is Investigating the Drive?

    Microsoft Academic Search

    Amelia Phillips; Kara L. Nance

    2010-01-01

    The number of states requiring a Private Investigator (PI) license to practice computer forensics is growing despite the wealth of evidence that demonstrates the requirements are inconsistent with the actual qualifications needed to be an effective digital forensics investigator. This paper explores the current trend, the early observed effects of this trend, the types of certifications available outside of the

  4. Investigating Special Properties of Light

    NSDL National Science Digital Library

    In this activity, students will investigate various aspects of the behavior of light. First, they will use diffraction gratings to view the colors or spectrum produced by visible light, then hold the diffraction grating in front of different light sources and record the colors that they see. They will examine common materials to determine whether they are transparent, translucent, or opaque and use a compact disk as a diffraction grating to look at different types of lights. They will also investigate the additive properties of color using spinning disks, investigate mirages with the help of a penny in a glass of water, and explore the connection between light and heat energy.

  5. Diving fatality investigations: recent changes.

    PubMed

    Edmonds, Carl; Caruso, James

    2014-06-01

    Modifications to the investigation procedures in diving fatalities have been incorporated into the data acquisition by diving accident investigators. The most germane proposal for investigators assessing diving fatalities is to delay the drawing of conclusions until all relevant diving information is known. This includes: the accumulation and integration of the pathological data; the access to dive computer information; re-enactments of diving incidents; post-mortem CT scans and the interpretation of intravascular and tissue gas detected. These are all discussed, with reference to the established literature and recent publications. PMID:24986727

  6. Cooperative autonomy for contact investigation

    E-print Network

    Schmidt, Henrik

    Autonomous surface and underwater vehicles present a safe and low-cost solution for various contact investigation tasks, such as harbor surveillance for potentially threatening small craft or submarines. Since such a task ...

  7. Investigating Forces: Balloon car activity

    NSDL National Science Digital Library

    This is a guided inquiry-based lab that investigates forces exerted on a group of student-designed and engineered "balloon cars". Each group of students is then challenged to build a "balloon car" that travels a maximum distance.

  8. Investigation of Zerodur material processing

    NASA Technical Reports Server (NTRS)

    Johnson, R. Barry

    1993-01-01

    The Final Report of the Center for Applied Optics (CAO), of The University of Alabama (UAH) study entitled 'Investigation of Zerodur Material Processing' is presented. The objectives of the effort were to prepare glass samples by cutting, grinding, etching, and polishing block Zerodur to desired specifications using equipment located in the optical shop located in the Optical System Branch at NASA/MSFC; characterize samples for subsurface damage and surface roughness; utilize Zerodur samples for coating investigations; and perform investigations into enhanced optical fabrication and metrology techniques. The results of this investigation will be used to support the Advanced X Ray Astrophysics Facility (AXAF) program as well as other NASA/MSFC research programs. The results of the technical effort are presented and discussed.

  9. An Investigation on Quadratic Equations.

    ERIC Educational Resources Information Center

    Hirst, Keith

    1988-01-01

    Argues that exploring a familiar topic or examination question in a novel manner is a useful way to find topics for mathematical investigation in the classroom. The example used to illustrate the premise is a quadratic equation. (PK)

  10. SURFACE SCIENCE INVESTIGATION OF CORROSION

    E-print Network

    Petta, Jason

    SURFACE SCIENCE INVESTIGATION OF CORROSION PROCESSES Danielle Haynes Professor Steve Bernasek August 3rd, 2009 #12;Outline Introduction Corrosion Processes AnalyticalTechnique (XPS) Motivation Methodology Preliminary Results Summary / FutureWork #12;Corrosion Process What is Corrosion? Degradation

  11. PMB — Investigator Registration Expiration Date

    Cancer.gov

    Skip to Content Home | Investigator Resources | Protocol Development | Initiatives/Programs/Collaborations | Links to More Resources | Funding Opportunities | About CTEP Home | Sitemap | Contact CTEP Search this site Pharmaceutical Management Branch

  12. PD detection limits in extruded power cables through wide and ultra-wide bandwidth detectors

    Microsoft Academic Search

    M. Tozzi; G. C. Montanari; A. Cavallini

    2008-01-01

    The aim of this paper is to infer partial discharge (PD) detection limits in extruded cables as a function of the distance between PD source and detection point. The investigation is carried out for different types of detectors, from IEC 60270-compliant to ultra-wide bandwidth systems. For this purpose, a medium voltage cable has been modeled as a transmission line with

  13. Sensitivity check for UHF PD detection on power transformers

    Microsoft Academic Search

    Sander Meijer; Edward Gulski; Johan J. Smit; H. F. Reijnders

    2004-01-01

    It is known that failure due to insulation defects are often preceded by partial discharge activity. Over the last years, online diagnostic methods for power transformers have been investigated. In this paper the sensitivity of one of these methods, the UHF PD detection technique, has been applied on five different high- and medium voltage transformers with power ratings in the

  14. Los Alamos Laser Eye Investigation.

    SciTech Connect

    Odom, C. R. (Connon R.)

    2005-01-01

    A student working in a laser laboratory at Los Alamos National Laboratory sustained a serious retinal injury to her left eye when she attempted to view suspended particles in a partially evacuated target chamber. The principle investigator was using the white light from the flash lamp of a Class 4 Nd:YAG laser to illuminate the particles. Since the Q-switch was thought to be disabled at the time of the accident, the principal investigator assumed it would be safe to view the particles without wearing laser eye protection. The Laboratory Director appointed a team to investigate the accident and to report back to him the events and conditions leading up to the accident, equipment malfunctions, safety management causal factors, supervisory and management action/inaction, adequacy of institutional processes and procedures, emergency and notification response, effectiveness of corrective actions and lessons learned from previous similar events, and recommendations for human and institutional safety improvements. The team interviewed personnel, reviewed documents, and characterized systems and conditions in the laser laboratory during an intense six week investigation. The team determined that the direct and primary failures leading to this accident were, respectively, the principle investigator's unsafe work practices and the institution's inadequate monitoring of worker performance. This paper describes the details of the investigation, the human and institutional failures, and the recommendations for improving the laser safety program.

  15. Investigation of transient overvoltages in heavily meshed low-voltage underground distribution networks

    NASA Astrophysics Data System (ADS)

    Salcedo Ulerio, Reynaldo Odalis

    The analysis of overvoltages in electrical distribution networks is of considerable significance since they may damage the power system infrastructure and the associated electrical equipment. Overvoltages in distribution networks arise due to switching transients, resonance, lightning strikes and ground faults, among other causes. The operation of network protectors (NWP), low voltage circuit breakers with directional power relay, in a secondary network prevents the continuous flow of reverse power. There are three modes of operation for the network protectors: sensitive, time delayed, and insensitive. In case of a fault, although all of the network protectors sense the fault at the same time, their operation is not simultaneous. Many of them open very quickly with opening times similar to those of the feeder breaker. However, some operate a few cycles later, others take several seconds to open and a few might even fail to operate. Therefore, depending on the settings of the network protectors, faults can last for significantly long time due to backfeeding of current from the low voltage (LV) network into the medium voltage (MV) network. In this work, low voltages are defined as 208V/460V and medium voltage are defined as 25kV/35kV. This thesis presents overvoltages which arise because of the occurrence of a single-line-to-ground (SLG) fault on the MV side (connected in delta) of the system. The thesis reveals that overvoltage stresses are imposed on insulation, micro-processor controlled equipment, and switching devices by overvoltages during current backfeeding. Also, it establishes a relationship between overvoltage magnitude, its duration, and the network loading conditions. Overvoltages above 3 p.u. may be developed as a result of a simultaneous occurrence of three phenomena: neutral displacement, Ferranti effect, and magnetic current chopping. Furthermore, this thesis exposes the possibility of occurrence of the ferro-resonance phenomena in a distribution network having secondary grid, making the study of extreme importance especially in the case of a misoperating network protector. The test systems for both studies were designed following the conventional distribution network with secondary grid, similar to those in the New York City Area. Simulations were performed using the electro-magnetic transient program revised version (EMTP-RV) considering detailed representation of system components as well as the non-linear magnetization and losses of transformers.

  16. Hurricane Katrina Wind Investigation Report

    SciTech Connect

    Desjarlais, A. O.

    2007-08-15

    This investigation of roof damage caused by Hurricane Katrina is a joint effort of the Roofing Industry Committee on Weather Issues, Inc. (RICOWI) and the Oak Ridge National Laboratory/U.S. Department of Energy (ORNL/DOE). The Wind Investigation Program (WIP) was initiated in 1996. Hurricane damage that met the criteria of a major windstorm event did not materialize until Hurricanes Charley and Ivan occurred in August 2004. Hurricane Katrina presented a third opportunity for a wind damage investigation in August 29, 2005. The major objectives of the WIP are as follows: (1) to investigate the field performance of roofing assemblies after major wind events; (2) to factually describe roofing assembly performance and modes of failure; and (3) to formally report results of the investigations and damage modes for substantial wind speeds The goal of the WIP is to perform unbiased, detailed investigations by credible personnel from the roofing industry, the insurance industry, and academia. Data from these investigations will, it is hoped, lead to overall improvement in roofing products, systems, roofing application, and durability and a reduction in losses, which may lead to lower overall costs to the public. This report documents the results of an extensive and well-planned investigative effort. The following program changes were implemented as a result of the lessons learned during the Hurricane Charley and Ivan investigations: (1) A logistics team was deployed to damage areas immediately following landfall; (2) Aerial surveillance--imperative to target wind damage areas--was conducted; (3) Investigation teams were in place within 8 days; (4) Teams collected more detailed data; and (5) Teams took improved photographs and completed more detailed photo logs. Participating associations reviewed the results and lessons learned from the previous investigations and many have taken the following actions: (1) Moved forward with recommendations for new installation procedures; (2) Updated and improved application guidelines and manuals from associations and manufacturers; (3) Launched certified product installer programs; and (4) Submitted building code changes to improve product installation. Estimated wind speeds at the damage locations came from simulated hurricane models prepared by Applied Research Associates of Raleigh, North Carolina. A dynamic hurricane wind field model was calibrated to actual wind speeds measured at 12 inland and offshore stations. The maximum estimated peak gust wind speeds in Katrina were in the 120-130 mph range. Hurricane Katrina made landfall near Grand Isle, Louisiana, and traveled almost due north across the city of New Orleans. Hurricane winds hammered the coastline from Houma, Louisiana, to Pensacola, Florida. The severe flooding problems in New Orleans made it almost impossible for the investigating teams to function inside the city. Thus the WIP investigations were all conducted in areas east of the city. The six teams covered the coastal areas from Bay Saint Louis, Mississippi, on the west to Pascagoula, Mississippi, on the east. Six teams involving a total of 25 persons documented damage to both low slope and steep slope roofing systems. The teams collected specific information on each building examined, including type of structure (use or occupancy), wall construction, roof type, roof slope, building dimensions, roof deck, insulation, construction, and method of roof attachment. In addition, the teams noted terrain exposure and the estimated wind speeds at the building site from the Katrina wind speed map. With each team member assigned a specific duty, they described the damage in detail and illustrated important features with numerous color photos. Where possible, the points of damage initiation were identified and damage propagation described. Because the wind speeds in Katrina at landfall, where the investigations took place, were less than code-specified design speeds, one would expect roof damage to be minimal. One team speculated that damage to all roofs in the area they examined was les

  17. Responsibility-Based Youth Programs Evaluation: Investigating the Investigations.

    ERIC Educational Resources Information Center

    Hellison, Don; Walsh, David

    2002-01-01

    Reviews 26 studies that have investigated the impact of the personal-social responsibility model (RM), a physical activity program model, on underserved and/or at-risk youth since its inception. Results indicate that field research encompasses a wide range of approaches. However, the 26 studies enhance the theoretical and practical potential of RM…

  18. Bioanalysis young investigator: Pan Deng.

    PubMed

    Deng, Pan

    2012-05-01

    I would like to nominate Pan Deng for the Bioanalysis Young Investigator Award 2012. Her research projects include developing LC-MS/MS methods for the quantification of small and large molecules to support drug pharmacokinetic studies. During her PhD training in my laboratory, she has gained much experience in developing sensitive LC-MS/MS methods for the measurement of various compounds, especially polar analytes, and published several research and review papers. As part of her PhD project, she also investigated the metabolism of drugs utilizing UPLC-Q/TOF MS. Her efforts in studying drug metabolism study have led to the finding of new metabolites, and unveiling the metabolic pathways of several new drug candidates. She is currently expanding her research into the area of drug toxicity. Hopefully this Young Investigator Award will encourage Deng to have greater achievements. PMID:22612679

  19. 100 Areas CERCLA ecological investigations

    SciTech Connect

    Landeen, D.S.; Sackschewsky, M.R.; Weiss, S.

    1993-09-01

    This document reports the results of the field terrestrial ecological investigations conducted by Westinghouse Hanford Company during fiscal years 1991 and 1992 at operable units 100-FR-3, 100-HR-3, 100-NR-2, 100-KR-4, and 100-BC-5. The tasks reported here are part of the Remedial Investigations conducted in support of the Comprehensive Environmental Response, compensation, and Liability Act of 1980 studies for the 100 Areas. These ecological investigations provide (1) a description of the flora and fauna associated with the 100 Areas operable units, emphasizing potential pathways for contaminants and species that have been given special status under existing state and/or federal laws, and (2) an evaluation of existing concentrations of heavy metals and radionuclides in biota associated with the 100 Areas operable units.

  20. Critical Viscosity of Xenon investigators

    NASA Technical Reports Server (NTRS)

    2001-01-01

    Dr. Dr. Robert F. Berg (right), principal investigator and Dr. Micheal R. Moldover (left), co-investigator, for the Critical Viscosity of Xenon (CVX/CVX-2) experiment. They are with the National Institutes of Standards and Technology, Gaithersburg, MD. The Critical Viscosity of Xenon Experiment (CVX-2) on the STS-107 Research 1 mission in 2002 will measure the viscous behavior of xenon, a heavy inert gas used in flash lamps and ion rocket engines, at its critical point. Although it does not easily combine with other chemicals, its viscosity at the critical point can be used as a model for a range of chemicals.

  1. Investigation on drop size distribution

    Microsoft Academic Search

    Y. H. Zhao; M. H. Hou; X. Z. Kong; J. S. Chin

    1984-01-01

    Two types of atomizer, swirl atomizer and air blast atomizer, have been investigated. For swirl atomizer, the effect of pressure drop, air velocity, fuel viscosity on drop size distribution (as expressed by the drop size distribution parameter N in Rosin-Rammler distribution), and for air blast atomizer, the effect of atomization air velocity, air\\/liquid ratio, axial distance from the nozzle on

  2. Investigating the Awareness of Remembering

    E-print Network

    Reber, Paul J.

    Investigating the Awareness of Remembering Ken A. Paller, Joel L. Voss, and Carmen E. Westerberg and of memory behaviors that transpire in the absence of the awareness of remembering. These examples illustrate cognitive transactions, the neu- ral events that make remembering possible, and the awareness of remembering

  3. Visualizing Chemistry: Investigations for Teachers.

    ERIC Educational Resources Information Center

    Ealy, Julie B.; Ealy, James L., Jr.

    This book contains 101 investigations for chemistry classrooms. Topics include: (1) Physical Properties; (2) Reactions of Some Elements; (3) Reactions Involving Gases; (4) Energy Changes; (5) Solutions and Solubility; (6) Transition Metals and Complex Ions; (7) Kinetics and Equilibrium; (8) Acids and Bases; (9) Oxidation-Reduction; (10)…

  4. The NEAR laser ranging investigation

    Microsoft Academic Search

    M. T. Zuber; D. E. Smith; A. F. Cheng; T. D. Cole

    1997-01-01

    The objective of the NEAR-Earth Asteriod Rendezvous (NEAR) laser ranging investigation is to obtain high integrity profiles and grids of topography for use in geophysical, geodetic and geological studies of asteroid 433 Eros. The NEAR laser rangefinder (NLR) will determine the slant range of the NEAR spacecraft to the asteroid surface by measuring precisely the round trip time of flight

  5. FDA'S Inspections of Clinical Investigators

    Microsoft Academic Search

    Michael Bruckheimer

    1993-01-01

    The FDA's recently revised compliance program for inspections of clinical investigators now focuses on determining authority to control the clinical studies and responsibility for administration of every aspect of the trial. During these inspections, we compare raw data with case record forms and in the converse, case record forms with raw data. We look for drug accountability; adherence by the

  6. Acoustic penetrometer for subsoil investigation

    Microsoft Academic Search

    C. K. Chan; J. K. Mitchell; P. T. Tringale; W. C. Villet

    1983-01-01

    A quasi-static cone penetrometer for subsoil investigation by simultaneously generating three sets of data, namely cone tip penetration resistance, sleeve friction resistance, and acoustical information, all as a function of depth. The penetrometer has a substantially smooth cylindrical outer surface terminating in a cone tip. The lower portion of the smooth cylindrical outer surface is provided by a friction sleeve

  7. Cooperative autonomy for contact investigation

    Microsoft Academic Search

    Toby Schneider; Henrik Schmidt; Thomas Pastore; Michael Benjamin

    2010-01-01

    Autonomous surface and underwater vehicles present a safe and low-cost solution for various contact investigation tasks, such as harbor surveillance for potentially threatening small craft or submarines. Since such a task may involve many contacts of interest, such as all the normal boat traffic in a busy harbor, a single unmanned surface vehicle (USV) is unlikely to be able to

  8. Nuclear California: an investigative report

    Microsoft Academic Search

    1982-01-01

    A team of investigative reporters examines the development of nuclear technology in California since the 1950s and challenges the lack of information on safety and military policy that is made available to the public. The 19 reports cover the potential for accidents caused by human actions or natural causes, terrorism, the nuclear-weapons industry and its relation to national security, and

  9. Investigating Minerals: Promoting Integrated Inquiry

    ERIC Educational Resources Information Center

    Thompson, Rudi; Carmack, Elizabeth

    2007-01-01

    "Mineral Detectives!" is one of eighteen lessons in the "Private Whys?" integrated science unit, which uses a guided inquiry investigation to teach students in grades three through five about the role of minerals in our lives. The University of North Texas developed "Private Whys?" with funding from the Copper Development Association. This lesson…

  10. Stream velocity Investigation using Inquiry

    NSDL National Science Digital Library

    This activity is a field investigation using science inquiry and problem solving, where small groups of students design their own experiment to determine stream velocity, collect and analyze their data, draw conclusions, and make further inferences based group discussion/collaboration.

  11. Investigating Gender Influences on Coping.

    ERIC Educational Resources Information Center

    Arthur, Nancy; Hiebert, Bryan

    A study was conducted at Southern Alberta Institute of Technology (SAIT) to investigate gender influences on coping strategies by tracking multiple episodes of demands and coping strategies throughout an academic year. The study sample consisted of 94 students enrolled in 2-year academic programs having at least a 70/30 gender ratio. From a pool…

  12. Progress in investigations of sphingolipidoses

    Microsoft Academic Search

    M. Adachi; L. Schneck; B. W. Volk

    1978-01-01

    A remarkable progress has been made in investigations of sphingolipidoses in the last few decades. The term sphingolipidosis refers to a disease group in which the primary metabolic defect results in an abnormal tissue accumulation of sphingolipids. This group of compounds comprises the gangliosides, cerebrosides, sulphatides and sphingomyelins. Gangliosides are a class of complex lipids which, by definition, contain sialic

  13. Investigating Culture through Cooperative Learning

    ERIC Educational Resources Information Center

    Allen, Linda Quinn

    2006-01-01

    Studies indicate that group work accompanied by the cooperative learning elements of individual accountability and structured independence among group members enhances student achievement. This article illustrates the implementation of a specific type of cooperative learning project called group investigation. The project is based on Slavin's…

  14. The NEAR laser ranging investigation

    Microsoft Academic Search

    M. T. Zuber; D. E. Smith; A. F. Cheng; T. D. Cole

    1997-01-01

    The objective of the Near-Earth Asteroid Rendezvous (NEAR) laser ranging investigation is to obtain high integrity profiles and grids of topography for use in geophysical, geodetic and geological studies of asteroid 433 Eros. The NEAR laser rangefinder (NLR) will determine the slant range of the NEAR spacecraft to the asteroid surface by measuring precisely the round trip time of flight

  15. Defining Problems and Planning Investigations

    NSDL National Science Digital Library

    Dustin Cannarella

    2011-10-01

    This lesson, if well planned out and conducted properly, addresses every component of the benchmark it is intended to cover. It involves a whole-group segment, during which the teacher provides a demonstration for students to observe. It also involves a segment that requires the students consult other sources of information related to what they observed in making their hypothesis and planning their investigation. It also involves a group-learning segment, that can easily be adjusted to incorporate differentiated instruction to accommodate students with special needs, during which students conduct the investigation they planned. Finally, it also involves a segment that allows the students the opportunity to communicate the results of their investigation and to evaluate the results of investigations conducted by others. It may also involve another segment involving direct instruction of the components of the scientific method and practice opportunities for students to develop their understanding of these components if this is determined to be necessary based upon the results of the pre-lesson assessment.

  16. The WIND magnetic field investigation

    Microsoft Academic Search

    R. P. Lepping; M. H. Ac?na; L. F. Burlaga; W. M. Farrell; J. A. Slavin; K. H. Schatten; F. Mariani; N. F. Ness; F. M. Neubauer; Y. C. Whang; J. B. Byrnes; R. S. Kennon; P. V. Panetta; J. Scheifele; E. M. Worley

    1995-01-01

    The magnetic field experiment on WIND will provide data for studies of a broad range of scales of structures and fluctuation characteristics of the interplanetary magnetic field throughout the mission, and, where appropriate, relate them to the statics and dynamics of the magnetosphere. The basic instrument of the Magnetic Field Investigation (MFI) is a boom-mounted dual triaxial fluxgate magnetometer and

  17. Investigating Biodiversity in your schoolyard

    NSDL National Science Digital Library

    In this field lab students will investigate the biodiversity around their school. Students will perform a biodiversity count using transect line. The students will develop multiple hypotheses relating to biodiversity and propose additional procedures for studying, collecting and testing these questions.

  18. Investigation of protein structure determination

    E-print Network

    Investigation of protein structure determination using X-ray free-electron lasers Dissertation zur sources, X-ray free-electron lasers (X- FEL's), several fields of research, including atomic and molecular Division in the Center for Free-electron Laser Science and graduate students of the Hamburg School

  19. Young investigators leverage research power

    Microsoft Academic Search

    Scofield

    1992-01-01

    EPRI has mounted a campaign to take full advantage of a valuable resource for utilities: the country's very best university researchers, as identified by the National Science Foundation. Through the NSF's Presidential Young Investigator (PYI) Awards program, the Institute now cofunds more than a dozen top researchers across the country. In this way, EPRI not only can leverage its research

  20. Energy Sources - Water Wheel Investigation

    NSDL National Science Digital Library

    This lesson plan investigates the conversion of potential energy to kinetic energy in a water wheel. Additionally, students will learn about the production of electricity through hydropower as well as the scientific process. Questions are included for students to record their observations and use critical thinking.This document may be downloaded in PDF file format.

  1. BIOINFORMATICS Investigating metabolite essentiality through

    E-print Network

    Belta, Calin A.

    validation and refinement in newly sequenced organisms. Combining an in silico genome-scale model of E. coli on a systems-level scale (Karp, 2001). A genome scale metabolic model serves such a purpose, providingBIOINFORMATICS Investigating metabolite essentiality through genome scale analysis of E. coli

  2. An empirical investigation of hypersexuality

    Microsoft Academic Search

    Nicole J. Rinehart; Marita P. McCabe

    1998-01-01

    The aim of this study was to investigate the nature of hypersexuality and the personality factors associated with the desire for and experience of high frequency sexual behavior. Participants in the study were 69 male and 93 female university students. Respondents reported on their desire for and experience of masturbation, oral sex, sexual intercourse, pornography, indecent phone calls or letters,

  3. IMPROVING WATERBORNE DISEASE OUTBREAK INVESTIGATIONS

    EPA Science Inventory

    This article summarizes the discussions and conclusions of a workshop held December 7-8, 1998, to consider the inherent limitations and weaknesses of waterborne outbreak investigations and make recommendations for their improvement. In recent years, an increased number of suspec...

  4. INVESTIGATIONS WITH MERCURY FLOW REACTOR

    EPA Science Inventory

    The objective of the research performed in the Mercury Flow Reactor is to investigate short residence-time (seconds) adsorption of mercury species using different sorbents. Emphasis is placed on the effects of mercury concentration, flow rates, reaction temperatures, exposure ti...

  5. ENVIRONMENTAL INVESTIGATIONS BRANCH STANDARD OPERATING PROCEDURES, 2001

    EPA Science Inventory

    The Environmental Investigations Standard Operating Procedures details standard field protocol in areas of Hazardous Waste Investigations under CERCLA and RCRA, Clean Water Act Inspections, Clean Air Act investigations, and Criminal Investigations. The manual originated in 1980 ...

  6. 32 CFR 637.6 - Customs investigations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...ENFORCEMENT AND CRIMINAL INVESTIGATIONS MILITARY POLICE INVESTIGATION Investigations § 637...such notifications will be made to the military police and investigated by CID or the military police, as appropriate. (b)...

  7. Scientific Investigation with the SJCSI

    NASA Astrophysics Data System (ADS)

    Berbey, E.; Delpeyroux, G.; Douay, E.; Juchereau, C.; Garavet, O.

    2012-04-01

    Scientific Investigation with the SJCSI (Saint Jean* Crime Scene Investigation) Our work, which we have been teaching for 3 years, consists of a scientific investigation. We create a case from A to Z and then our students (15 to 16 years old) are meant to collect samples and clues from a reconstituted crime scene and then have to catch the culprit thanks to laboratory tests crossing four subjects: Physics and Chemistry, Biology, Math and English. I'm a biology teacher and I work with 3 other teachers in my school. The objectives of these activities are: • Make sciences more attractive by putting them into a context of crime investigation. • Use science techniques to find a culprit or to clear a suspect. • To acquire scientific knowledge. • Realize that the different scientific subjects complement each other to carry out a survey. • Use English language and improve it. The investigation consists of doing experiments after collecting different samples and clues on the crime scene. Examples of Biology experimentation: • Detecting the origin of the blood samples found on the crime scene. Students observe blood samples with a microscope and compare the characteristics to those of human blood found on the web. They discover that blood samples found aren't human blood because the red cells have a nucleus. By using the information given in the scenario, they discover that blood sample belongs to the parrot of a suspect. Students, also take a photo of their microscopic preparations, add title and caption and so they learn the cell's structure and the characteristics of blood cells. • In another case, students have to study the blood sample found under the victims fingernails. They observe blood preparation and compare it to the blood of a suspect who has a genetic disease: drepanocytosis. So, they discover the characteristics of blood cells by comparing them to sickle cells. • DNA electrophoresis to identify DNA found, for example, on the gun. • Blood type identification. They discover how blood types work, the different antigens in the plasma and antibodies on the red cells. In three years, we have solved 3 different cases. Here is the link to our website: https://sites.google.com/site/websvtberbey/mps---science-et-investigation-policiere *Saint Jean is the name of our secondary school.

  8. ATMOS Spacelab 1 science investigation

    NASA Technical Reports Server (NTRS)

    Park, J. H.; Smith, M. A. H.; Twitty, J. T.; Russell, J. M., III

    1979-01-01

    Existing infrared spectra from high speed interferometer balloon flights were analyzed and experimental analysis techniques applicable to similar data from the ATMOS experiment (Spacelab 3) were investigated. Specific techniques under investigation included line-by-line simulation of the spectra to aid in the identification of absorbing gases, simultaneous retrieval of pressure and temperature profiles using carefully chosen pairs of CO2 absorption lines, and the use of these pressures and temperatures in the retrieval of gas concentration profiles for many absorbing species. A search for a new absorption features was also carried out, and special attention was given to identification of absorbing gases in spectral bandpass regions to be measured by the halogen occultation experiment.

  9. Combinatorial Investigations of Polymer Adhesion

    NSDL National Science Digital Library

    Crosby, Alfred

    2001-01-01

    In this work, we introduce a combinatorial technique that can be used to investigate adhesive interactions between a polymer and either another polymer, a ceramic, or a metal. The primary goal in the development of this technique is to design a high-throughput, parallel processing adhesion test that allows the adhesive strength dependence on multivariable environments to be determined. This combinatorial polymer adhesion test will provide qualitative and quantitative data used to determine absolute measures of adhesion as a function of the multidimensional parameter space. These results will aid industrial screening for optimal adhesives, as well as provide a unique tool for gaining a fundamental understanding of polymer adhesion. We investigate the temperature and thickness dependence of the self-adhesion of polystyrene (PS) and the adhesion between PS and poly(dimethylsiloxane) (PDMS) for demonstration of concept.

  10. Investigating Factors that Influence Climate

    NSDL National Science Digital Library

    There are several factors that influence the climate or prevailing weather conditions for any given location on Earth. The most important factor is the latitude of the location because that affects the amount of solar radiation received throughout the year. Other factors include its distance from a body of water (its moisture source), elevation and local topography. In this 6 to 10 day unit plan, students will employ inquiry methods to investigate how latitude and longitude (and distance from oceans) impact climatic factors such as temperature range, average temperature, and precipitation. They will create climatic diagrams called climatograms that allow them to display monthly average weather conditions such as temperature and precipitation at a particular location. They will then use the data to design an investigation about the factors that influence climate.

  11. Investigation on the holographic principle

    Microsoft Academic Search

    Li Jiang

    2003-01-01

    The holographic principle asserts that any given codimension two space-like surface limits the information content of adjacent regions. We first review various entropy bounds which lead to the formulation of this conjecture, putting great emphasis on the UV-IR connection. We propose to use non-commutative field theory as a toy model to study the holographic mapping mechanism. In particular, we investigate

  12. Investigation of dynamic ground effect

    NASA Technical Reports Server (NTRS)

    Chang, Ray Chung; Muirhead, Vincent U.

    1987-01-01

    An experimental investigation of dynamic ground effect was conducted in the Univ. of Kansas wind tunnel using delta wings of 60, 70, 75 deg sweep; the XB-70 wing; and the F-104A wing. Both static and dynamic tests were made. Test data were compared to other test data, including dynamic flight test data of the XB-70 and F-104A. Limited flow visualization test were conducted. A significant dynamic effect was found for highly swept delta wings.

  13. Experimental investigation of polarization diversity

    Microsoft Academic Search

    Ali Morshedi; Murat Torlak

    2008-01-01

    Polarization diversity is an interesting alternative to space diversity, but the channel characteristics need to be investigated. To evaluate the dual polarized channels, a 2times2 multiple-input-multiple-output (MIMO) wireless testbed has been developed. In addition, a dual polarized microstrip patch antenna array has been designed to be used as the transmitter and receiver in this system. Performance evaluation has been based

  14. Investigation of Ge component cells

    Microsoft Academic Search

    C. Baur; M. Meusel; F. Dimroth; A. W. Bett

    2005-01-01

    In this paper we investigate germanium (Ge) component cells with respect to their suitability as test structures for irradiation experiments and as reference cells. It will be demonstrated by means of spectral response measurements that Ge component cells do not exhibit the same behavior as a Ge subcell in the complete triple-junction (3J) device. Photon recycling from upper layers (GaInP,

  15. NMR Investigations of Nanostructured Ceramics

    Microsoft Academic Search

    M. Edgar; M. Schubert; H. H. Limbach

    Nanostructured mesoporous silicates displaying hexagonally arranged channels, templated using a liquid crystal mesophase, were investigated using H-2 and N-15 NMR spectroscopy. It is shown that N-I5 MAS NMR spec- troscopy allows to estimate the surface acidity of mesoporous materials by measuring the N-H bond length via the N-15 chemical shift. Further, H-2 and N-15 NMR spectroscopy identify significant differences between

  16. investigational medicinal product dossier (IMPD)

    Microsoft Academic Search

    Gerhard Nahler

    \\u000a The IMPD (full or simplified) gives information to justify the quality of any IMP to be used in the clinical trial, including\\u000a reference products\\/comparators and placebos and includes summaries of information related to the quality, manufacture and\\u000a control of the investigational medicinal product, data from non-clinical studies and from its clinical use; it is the basis\\u000a for approval of clinical

  17. Authorship Analysis in Cybercrime Investigation

    Microsoft Academic Search

    Rong Zheng; Yi Qin; Zan Huang; Hsinchun Chen

    2003-01-01

    Criminals have been using the Internet to distribute a wide range of illegal materials globally in an anonymous manner, making\\u000a criminal identity tracing difficult in the cybercrime investigation process. In this study we propose to adopt the authorship\\u000a analysis framework to automatically trace identities of cyber criminals through messages they post on the Internet. Under\\u000a this framework, three types of

  18. Investigating Natural Selection: Elementary School

    NSDL National Science Digital Library

    2010-01-01

    This lesson plan is designed for fourth and fifth grade students learning about natural selection. The class will investigate the predator-prey relationship as an example of how natural selection occurs in a population. Students will work in groups of three or four and observe how predators select their prey, and how this affects the subsequent populations of a species. The concept of camouflage is also covered in the material. This lesson is designed to take about sixty minutes of class time.

  19. CODE OF PRACTICE ON INVESTIGATIONS

    E-print Network

    Mottram, Nigel

    clinical trials 25 9.1 Process 26 9.2 Honorary contracts 26 9.3 Model agreement for non-commercial research of investigators 15 4.2 Recruitment of participants 15 4.3 Informed consent 16 4.4. Anonymity 20 4.5 Information history 21 4.7. Medical records and other records relating to care, education etc 22 4.8 Research

  20. Bubble detector investigations in China.

    PubMed

    Guo, Shi-Lun

    2006-01-01

    Investigation on bubble detectors started in China in 1989. Five types of bubble detectors have been developed, with LET thresholds ranging from 0.05 to 6.04 MeV mg(-1) cm(2) at 25 degrees C. The neutron response of bubble detectors made with freon-12 has been investigated with mono-energetic neutrons from 20 keV to 19 MeV. Its effective threshold energy for neutron detection is approximately 100 keV at 28 degrees C. The response above this threshold is approximately 1.5 x 10(-4) (bubble cm(-2))/(n cm(-2)). Bubble detectors are unique not only for neutron dosimetry but also for monitoring and identifying high-energy heavy ions such as cosmic radiation in the space. High-energy heavy ion tracks in large size bubble detectors have been investigated in cooperation with scientists in Japan. The key parameter behind the thresholds of bubble detectors for track registration is the critical rate of energy loss. Three approaches to identify high-energy heavy ions with bubble detectors are suggested. PMID:16782985

  1. Experimental investigations of frustrated antiferromagnets

    NASA Astrophysics Data System (ADS)

    Shirai, Masae

    This thesis describes the investigation of frustrated magnetic systems, focusing on the pyro-chlore antiferromagnets (AFM). The rare-earth pyrochlore oxides R2B2Oj {R+ = rare earth, = transition metal), crystallizes in the Fd3m space group, with the magnetic ions (R) and the non-magnetic transition metal (B) ions situated on the 16c and on the 6d sites, respectively. As a result, the magnetic ions form lattices of corner-sharing tetrahedra-a stage in which frustration is manifested. Erbium titanate Er2Ti2C>7 and stannate ESO are both frustrated pyrochlore antiferromagnets which are expected to have very similar magnetic properties. However, Er2Ti207 magnetically orders at 7n 1.1 K but Er2Sn207 remains disordered down to F 150 mK. The main aim of this thesis is therefore to investigate the origin of this difference. The magnetic properties of the series Er2Ti2.jrSn.xO7 were studied as a function of jc (jc = 0 2). Firstly, from the powder neutron diffraction patterns obtained, it was shown that the detected order diminishes as jc * 2. However, in contrast to the previously reported result, a long-ranged ordering transition was detected for Er2Ti207 (at 80 mK) as well as for Er2Ti2<37 (at 1.2 K). The ordered magnetic structure was determined while Er2Ti207 orders into the Champion state (one of the ground state of the pyrochlore (lll)-XY AFM), Er2Sn207 orders into a ground state of a Heisenberg pyrochlore AFM with dipolar interaction (Palmer-Chalker state). Secondly, the existence of the quantum critical point (QCP) in the composition range 1.5 < x < 2 was investigated by means of low temperature magnetization measurements. The critical composition jccrjticai 1-55 was determined. Thirdly, the single ion anisotropy of the series ETiSnxO (x = 0 2) was studied by analyzing the crystal electric field (CEF) measured by the inelastic neutron scattering. As a result, the single-ion moments were shown to retain a constant size ( 3 Ub) throughout the series. In contrast, the nature of the single ion anisotropy changed from being XY-like for jc = 0 into being Ising-like for jc = 2 (with respect to the <111)- axes). Finally, the temperature-field phase diagram of the experimental realization of the Heisenberg pyrochlore AFM -Gd2Ti207, was investigated by means of powder neutron diffraction.

  2. Cathodoluminescence investigation of organic materials.

    PubMed

    Niitsuma, Jun-Ichi; Oikawa, Hidetoshi; Kimura, Eiji; Ushiki, Tatsuo; Sekiguchi, Takashi

    2005-08-01

    Cathodoluminescence (CL) properties of various kinds of organic material were investigated for the purpose of staining biological specimens and obtaining CL images. Several kinds of organic light emitting device (OLED) material exhibited CL. The europium complex, Eu(dbm)3(phen), showed the strongest CL signal and was chemically modified for biological staining. However, the CL intensity from the stained biological specimen was too weak to build CL images. We discussed the CL properties of organic materials considering their chemical structure and charge distribution in the molecules. PMID:16123064

  3. Alkaline fuel cell performance investigation

    NASA Technical Reports Server (NTRS)

    Martin, R. E.; Manzo, M. A.

    1988-01-01

    An exploratory experimental fuel cell test program was conducted to investigate the performance characteristics of alkaline laboratory research electrodes. The objective of this work was to establish the effect of temperature, pressure, and concentration upon performance and evaluate candidate cathode configurations having the potential for improved performance. The performance characterization tests provided data to empirically establish the effect of temperature, pressure, and concentration upon performance for cell temperatures up to 300 F and reactant pressures up to 200 psia. Evaluation of five gold alloy cathode catalysts revealed that three doped gold alloys had more that two times the surface areas of reference cathodes and therefore offered the best potential for improved performance.

  4. Holographic investigations of skin vibrations.

    PubMed

    Pawluczyk, R; Kraska, Z; Pawlowski, Z

    1982-03-01

    The paper describes preliminary results of the use of double-pulse holographic interferometry for vibration investigations of the skin surface of a singer's face (epiphysis), neck, larynx, and sternum. Holographic interferograms obtained in the experiment illustrate a dependence of the distribution of vibrations on the type of sound and on the fundamental frequency for the same person. The vibration interferograms of various persons are different even at the same sound and frequency. The method may become useful for diagnosis of voice timbre as well as in pathological cases. PMID:20372536

  5. Probeware Tools for Science Investigations

    NSDL National Science Digital Library

    John C. Park

    2008-01-01

    Probeware is the general term used for probes and software that can be used with microprocessors (computer, calculator, palm device, etc.) to make scientific measurements. The characteristics of rapid data collection, nearly instantaneous display of data in tabular or graphical form, analysis tools, and the ability to collect data consistently over long periods of time enable probeware to be one of the most important tools at the science teacher's disposal. A new world of possible student investigations opens up with the use of these tools.

  6. Folding scene investigation: membrane proteins

    PubMed Central

    Booth, Paula J; Curnow, Paul

    2009-01-01

    Investigations into protein folding have concentrated on experimentally tractable proteins with the result that membrane protein folding remains unsolved. New evidence is providing insight into the nature of the interactions stabilising the folded state of ?-helical membrane proteins as well as giving hints on the character of the folding transition state. These developments show that classical methods used for water-soluble proteins can be successfully adapted for membrane proteins. The advances, coupled with increasing numbers of solved crystal structures, augur well for future research into the mechanisms of membrane protein folding. PMID:19157854

  7. Rotational Investigation of Tropane Alkaloids

    NASA Astrophysics Data System (ADS)

    Cocinero, Emilio J.; Lesarri, Alberto; Ecija, Patricia; Grabow, Jens-Uwe; Fernández, Jose A.; Castano, Fernando

    2010-06-01

    We report an investigation of the rotational spectrum of several tropane alkaloids using the new Balle-Flygare-type FT-MW spectrometer built at the University of the Basque Country. The initial work focused on the azabicycles of tropinone, scopine and scopoline, vaporized using heating methods. For tropinone the spectrum confirmed the presence of equatorial and axial conformers originated by the inversion of the N-methyl group, with the tropane motif adopting a distorted chair configuration. The determination of substitution and effective structures for the two conformers included the 13C, 15N and 18O isotopomers observed in natural abundance. The structures revealed the flexibility and structural changes associated to the N-methyl inversion, mostly a flattening at the nitrogen atom and a simultaneous rising of the carbonyl group in the axial form. The investigation of scopine gave an intense spectrum, but it was inconsistent with the structural models expected for this molecule. The carrier of the new spectrum was later identified as scopoline, generated in situ by an intramolecular reaction at the moderate temperatures of the nozzle. A single conformation was detected for scopoline, with an ether bridge seriously distorting the tropane motif. E. J. Cocinero, A. Lesarri, P. écija, J.-U. Grabow, J. A. Fernández, F. Castaño, in publication, 2010 E. J. Cocinero, A. Lesarri, P. Écija, J.-U. Grabow, J. A. Fernández, F. Castaño, Phys. Chem. Chem. Phys.,in press, 2010

  8. Measles investigation: a moving target.

    PubMed

    Helmecke, Megan R; Elmendorf, Sarah L; Kent, Donna L; Pauze, Daniel K; Pauze, Denis R

    2014-08-01

    Measles is a highly contagious respiratory infection with significant transmission risk once thought to be on the verge of elimination. Outbreaks in Europe have resulted in resurgence; however, experience with measles is limited in the United States. We describe the impact of 2 measles cases presenting to our emergency department in May 2011. Exposure criteria were defined and revised. Guidance documents were developed and distributed. Suspect cases were masked and escorted to negative pressure. Lack of prompt IgM and polymerase chain reaction testing resulted in delayed disease confirmation. Computerized flagging systems were established. Exposed individuals were screened to determine the need for prophylaxis. Investigation costs were calculated. A total of 171 patients and visitors and 94 employees met exposure criteria. Employees had proof of immunity to measles. Of these, 43 patients and visitors returned for prophylaxis. No subsequent transmission occurred. The conservative cost for these investigations was $63,176.39. Multiple challenges were identified. Inexperience with measles can result in significant outbreaks. Although transmission did occur at another facility, it was prevented at our facility because of rapid case recognition, isolation, health care worker immunity, and multidisciplinary response. Discordance between the Healthcare Infection Control Practices Advisory Committee and public health guidelines for measles control created unnecessary challenges. PMID:24939517

  9. Microgravity Science Glovebox Investigations SUBSA

    NASA Technical Reports Server (NTRS)

    Ostrogorsky, A.; Marin, C.; Vogel, M.; Volz, M. P.; Luz, P.; Jeter, L.; Spivey, Reggie; Duffar, Thierry; Geveden, Rex D. (Technical Monitor)

    2001-01-01

    Solidification Using a Baffle in Sealed Ampoules (SUBSA) is a Microgravity Science Glovebox Investigation manifested for the UF2 flight, on the U.S. Orbiter 111, to the International Space Station (ISS). SUBSA complements the "parent" flight investigation CG13 (Space-and Groundbased Crystal Growth Using a Baffle). During directional solidification, the disk-shaped baffle acts as a partition, creating a small melt zone at the solid-liquid interface. As a result, the level of buoyancy-driven convection at the interface is significantly reduced. In space, the baffle will reduce convection driven by residual micro acceleration. The baffle reduces the Rayleigh number (Ra) of the melt by a factor of 103. The combined effect of the baffle and microgravity will yield a reduction in Ra by a factor of 107 to 109 approaching effectively the acceleration conditions in "nanogravity". The results of ground based tests and numerical modeling will be presented. The furnace for directional solidification (flight hardware and the ground unit) was developed by Tec-Masters Inc. The flight ampoules were produced jointly at Rensselaer, Tec-Masters Inc. and Crystallod Inc.

  10. 18 CFR 1b.5 - Formal investigations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Formal investigations. 1b.5 Section 1b.5 Conservation...ENERGY GENERAL RULES RULES RELATING TO INVESTIGATIONS § 1b.5 Formal investigations. The Commission may, in its...

  11. 29 CFR 1981.104 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigation. 1981.104 Section 1981...IMPROVEMENT ACT OF 2002 Complaints, Investigations, Findings, and Preliminary Orders § 1981.104 Investigation. (a) Upon receipt...

  12. 10 CFR 501.180 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Investigations. 501.180 Section 501...ADMINISTRATIVE PROCEDURES AND SANCTIONS Investigations, Violations, Sanctions and Judicial Actions § 501.180 Investigations. (a) General....

  13. 29 CFR 1980.104 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigation. 1980.104 Section 1980.104...SARBANES-OXLEY ACT OF 2002 Complaints, Investigations, Findings and Preliminary Orders § 1980.104 Investigation. (a) Upon receipt...

  14. 77 FR 44174 - Procedures for Safety Investigations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-27

    ...CFR Part 1708 Procedures for Safety Investigations AGENCY: Defense Nuclear Facilities...conducting preliminary and formal safety investigations of events or practices at DOE defense...experience in conducting formal safety investigations necessitates codifying the...

  15. 45 CFR 1156.17 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Investigation. 1156.17 Section 1156...NONDISCRIMINATION ON THE BASIS OF AGE Investigation, Conciliation, and Enforcement Procedures § 1156.17 Investigation. (a) Informal...

  16. 10 CFR 1040.89-7 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Investigation. 1040.89-7 Section 1040...Discrimination Act of 1975, as Amended Investigation, Conciliation and Enforcement Procedures § 1040.89-7 Investigation. (a) Informal...

  17. 34 CFR 110.33 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigation. 110.33 Section 110.33...RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 110.33 Investigation. (a) Initial...

  18. 18 CFR 1b.6 - Preliminary investigations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 2010-04-01 false Preliminary investigations. 1b.6 Section 1b.6 Conservation...ENERGY GENERAL RULES RULES RELATING TO INVESTIGATIONS § 1b.6 Preliminary investigations. The Commission or its staff...

  19. 10 CFR 4.334 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Investigation. 4.334 Section 4.334...Discrimination Act of 1975, as Amended Investigation, Conciliation, and Enforcement Procedures § 4.334 Investigation. (a) Informal...

  20. 30 CFR 50.11 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigation. 50.11 Section 50.11 Mineral...PRODUCTION IN MINES NOTIFICATION, INVESTIGATION, REPORTS AND RECORDS OF ACCIDENTS...PRODUCTION IN MINES Notification, Investigation, Preservation of Evidence §...

  1. 22 CFR 143.34 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Investigation. 143.34 Section 143.34...RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 143.34 Investigation. (a) Informal...

  2. 43 CFR 17.333 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Investigation. 17.333 Section 17.333...Nondiscrimination on the Basis of Age Investigation, Conciliation, and Enforcement Procedures § 17.333 Investigation. (a) Informal...

  3. 15 CFR 20.13 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Investigation. 20.13 Section 20.13...RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 20.13 Investigation. (a) Informal...

  4. 38 CFR 18.544 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigation. 18.544 Section 18.544...Nondiscrimination on the Basis of Age Investigation, Conciliation, and Enforcement Procedures § 18.544 Investigation. (a) Informal...

  5. 37 CFR 11.22 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigations. 11.22 Section 11.22...PATENT AND TRADEMARK OFFICE Investigations and Disciplinary Proceedings; Jurisdiction, Sanctions, Investigations, and Proceedings §...

  6. 29 CFR 1979.104 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigation. 1979.104 Section 1979.104...FOR THE 21ST CENTURY Complaints, Investigations, Findings and Preliminary Orders § 1979.104 Investigation. (a) Upon receipt...

  7. 22 CFR 304.5 - Investigations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Investigations. 304.5 Section 304.5 Foreign Relations PEACE CORPS CLAIMS AGAINST GOVERNMENT UNDER FEDERAL TORT CLAIMS ACT Procedures § 304.5 Investigations. The Peace Corps may investigate, or the General Counsel may request any...

  8. 22 CFR 304.5 - Investigations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Investigations. 304.5 Section 304.5 Foreign Relations PEACE CORPS CLAIMS AGAINST GOVERNMENT UNDER FEDERAL TORT CLAIMS ACT Procedures § 304.5 Investigations. The Peace Corps may investigate, or the General Counsel may request any...

  9. 22 CFR 304.5 - Investigations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Investigations. 304.5 Section 304.5 Foreign Relations PEACE CORPS CLAIMS AGAINST GOVERNMENT UNDER FEDERAL TORT CLAIMS ACT Procedures § 304.5 Investigations. The Peace Corps may investigate, or the General Counsel may request any...

  10. 48 CFR 222.406-8 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...contractor of the general scope of the investigation, and that the investigation will include examining pertinent records and interviewing employees. In conducting the investigation, follow the procedures at PGI 222.406-8(a). (c) Contractor...

  11. 49 CFR 659.35 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...the oversight agency must review and formally adopt the final investigation report. (3) If the oversight agency does not concur with the findings of the rail transit agency investigation report, it must either: (i) Conduct its own investigation...

  12. Wildlife health and disease investigations

    USGS Publications Warehouse

    Roffe, T.J.; Work, T.M.

    2005-01-01

    Wildlife population management requires knowledge of factors that affect population sustainability. Mortality is one of the most important of those factors. Without a clear understanding of the causes of mortality, decisions by managers of whether or how to intercede may be inappropriate. Wildlife biologists are usually the first to discover, assess, and respond to wildlife mortality. Biologists who make accurate, complete and timely field investigations, and proper collection and shipment of samples to a diagnostic facility are essential for an accurate diagnosis. In combination with wildlife disease specialists, biologists can identify causes of wildlife mortality, detect long-term patterns in factors that affect the survival of populations, and take appropriate corrective action to minimize the impact of some mortality factors on wildlife populations.

  13. Investigating Patterns: Symmetry and Tessellations

    NSDL National Science Digital Library

    This website provides 30 suggested activities in Symmetry and Tessellations using resources available across the World Wide Web. The author, Jill Britton, has complied this collection of links to coordinate with the chapters and activities from her publication, "Investigating Patterns: Symmetry and Tessellations" (Grades 5-8). The activities begin with "What is Mathematics?" and move on to cover topics such as Pythagoras´ observations of music, patterns on Ukrainian Easter eggs, and tessellating art. She provides a short comment on each of the websites and the links are arranged by activity topic. Links at the bottom of the website will take visitors to other collections of links relating to more pattern-related activities.

  14. Selling Complementary Patents: Experimental Investigation

    SciTech Connect

    Bjornstad, David J [ORNL; Santore, Rudy [University of Tennessee; McKee, Michael [University of Tennessee

    2010-02-01

    Production requiring licensing groups of complementary patents implements a coordination game among patent holders, who can price patents by choosing among combinations of fixed and royalty fees. Summed across patents, these fees become the total producer cost of the package of patents. Royalties, because they function as excise taxes, add to marginal costs, resulting in higher prices and reduced quantities of the downstream product and lower payoffs to the patent holders. Using fixed fees eliminates this inefficiency but yields a more complex coordination game in which there are multiple equilibria, which are very fragile in that small mistakes can lead the downstream firm to not license the technology, resulting in inefficient outcomes. We report on a laboratory market investigation of the efficiency effects of coordinated pricing of patents in a patent pool. We find that pool-like pricing agreements can yield fewer coordination failures in the pricing of complementary patents.

  15. Polarimetric Investigations of Stellar Associations

    NASA Astrophysics Data System (ADS)

    Khachikian, E. Ye.; Eritsian, M. A.; Hovhannessian, R. Kh.

    2002-07-01

    The degree of polarization of light from stars in 44 O B associations as a function of interstellar absorption is investigated. It is shown that the character of the dependence of P on A V for stars in associations and stars not in associations depends on the value of A V: for A V 2 m .5 it has a linear character and is the same for both groups of stars. For A V > 2 m .5 the dependence of P on A V for stars in and not in associations departs from linearity and for A V = 4 m .5 it reaches P ass = 1.8% and P nonass = 1%, respectively. Such a difference is explained by the additional depolarization in stellar associations. Such strong depolarization in associations may be due to the overall magnetic field of the Galaxy and to physical peculiarities in the association itself.

  16. Investigation of Celestial Solid Analogs

    NASA Technical Reports Server (NTRS)

    Sievers, A. J.

    2003-01-01

    Our far infrared studies of both hydrophobic and hydrophilic aerogel grains have demonstrated that the mm and sub-mm wave absorption produced by the fundamental two level systems (TLS) mechanism represents a more significant contribution for these open grain structures than for bulk amorphous silicate grains. We found that the region with the anomalous temperature dependence of the spectral index due to the TLS excitations can extend in a fluffy material up to 80 per cm, which is well beyond its typical upper limit for bulk glasses. Currently there is no theoretical explanation for this surprising result. The effects of reduced dimensionality on the optical properties of carbonaceous grains have been studied with a systematic investigation of carbon aerogels. This spectroscopic approach has permitted a more reliable determination of the single grain mass normalized absorption coefficient based on the experimentally determined characteristics of the fluffy material rather than on first principles calculations involving the bulk properties of the substance. Our finding is that the electrical connectivity of the material is the main factor affecting its far infrared absorption coefficient. Another one of the main constituents of the interstellar dust, amorphous ice, has been investigated in the mm-wave region both in the high (HDA) and low (LDA) density amorphous phases and as a function of impurities. We found that doping either phase with ionic (LiCl) or molecular (methanol) impurities decreases the difference in the mm-wave absorption coefficient between the HDA and LDA ice phases so that the HDA spectrum can be used as an analog for impure ice absorption in the far infrared spectral region.

  17. Investigative modalities in infectious keratitis

    PubMed Central

    Gupta, Noopur

    2008-01-01

    Standard recommended guidelines for diagnosis of infectious keratitis do exist. Based on an extensive Medline literature search, the various investigative modalities available for aiding the diagnosis of microbial keratitis have been reviewed and described briefly. Preferred practice patterns have been outlined and the importance of routine pre-treatment cultures in the primary management of infectious keratitis has been highlighted. Corneal scraping, tear samples and corneal biopsy are few of the specimens needed to carry out the investigative procedures for diagnosis and for initiating therapy in cases of microbial keratitis. In bacterial, fungal and amoebic keratitis, microscopic examination of smears is essential for rapid diagnosis. Potassium hydroxide (KOH) wet mount, Gram?s stain and Giemsa stain are widely used and are important for clinicians to start empirical therapy before microbial culture results are available. The usefulness of performing corneal cultures in all cases of suspected infectious keratitis has been well established. In cases of suspected viral keratitis, therapy can be initiated on clinical judgment alone. If a viral culture is needed, scrapings should directly be inoculated into the viral transport media. In vivo confocal microscopy is a useful adjunct to slit lamp bio-microscopy for supplementing diagnosis in most cases and establishing early diagnosis in many cases of non-responding fungal and amoebic keratitis. This is a non-invasive, high resolution technique which allows rapid detection of Acanthamoeba cysts and trophozoites and fungal hyphae in the cornea long before laboratory cultures give conclusive results. Other new modalities for detection of microbial keratitis include molecular diagnostic techniques like polymerase chain reaction, and genetic finger printing by pulsed field gel electrophoresis. PMID:18417821

  18. Postirradiation investigations at Forschungszentrum Juelich

    SciTech Connect

    Carsughi, F. [Forschungszentrum Juelich (Germany). Inst. fuer Festkoerperforschung; Sommer, W. [Los Alamos National Lab., NM (United States)

    1998-09-01

    Materials performance at high-power spallation neutron sources is a major consideration worldwide during this period of time when designs for several new facilities are being developed. Realizing the need for materials radiation effects data from exposure to prototypical environments, studies at the Los Alamos Neutron Science Center (LANSCE), Los Alamos National Laboratory, and the spallation neutron source (SINQ) at the Paul Scherrer Institut (PSI), Villigen, Switzerland, have been initiated. A number of candidate materials are considered, and post-irradiation investigations should give definite answers to the engineers engaged in the design of the future accelerator-based facilities. Before the data from these irradiations become available, components irradiated in operating medium-power spallation facilities are at present the only source of direct information on the behavior of materials in a spallation environment. Within an international collaboration, the following components were shipped to the hot cells of the Forschungszentrum Juelich: (1) a hemispherical window operated at LANSCE made of Inconel 718; (2) a spherical water degrader made of Inconel 718 and Type 304L stainless steel used for the neutrino production in the target area of LANSCE; (3) two curved PSI windows made of DIN 1.4926 stainless steel and irradiated in LANSCE; and (4) a complete target from ISIS at Rutherford Appleton Laboratory in England consisting of Ta plates in a Type 304 stainless steel housing, used to produce neutrons for the experimental program from 1988 to 1996. Because of the urgent need to have mechanical properties information after proton irradiation of Inconel 718, the priority of the investigation was given to the outer shell of the water degrader. The water degrader was irradiated with 800-MeV protons to a maximum damage level in the center of the proton beam of {approximately}10 displacements per atom.

  19. Investigation of superlattice device structures

    NASA Technical Reports Server (NTRS)

    Gergis, I. S.; Manasevit, H. M.; Lin, A. L.; Jones, A. B.

    1985-01-01

    This report describes the investigation of growth properties, and the structure of epitaxial multilayer Si(Si(1x)Ge(x)) films grown on bulk Silicon Substrates. It also describes the fabrication and characterization of MOSFET and MESFET devices made on these epitaxial films. Films were grown in a CVD reactor using hydrides of Si and Ge with H2 and He as carrier gases. Growth temperatures were between 900 C and 1050 C with most films grown at 1000 C. Layer thickness was between 300A and 2000A and total film thickness was between 0.25 micro m and 7 micro m. The Ge content (X) in the alloy layers was between .05 and 0.2. N-type multilayer films grown on (100) p-type Si showed Hall mobility in the range 1000 to 1500 sq cm/v for an average carrier concentration of approx. 10 to the 16th power/cu cm. This is up to 50% higher than the Hall mobility observed in epitaxial Si films grown under the same conditions and with the same average carrier concentration. The mobility enhancement occurred in films with average carrier concentration (n) from 0.7 x 10 to the 16th power to 2 x 10 to the 17th power/cu cm, and total film thickness greater than 1.0 micro m. No mobility enhancement was seen in n-type multilayer films grown on (111) Si or in p-type multilayer films. The structure of the films was investigated was using SEM, TEM, AES, SIMS, and X-ray double crystal diffraction techniques. The film composition profile (AES, SIMS) showed that the transition region between layers is of the order of about 100A. The TEM examination revealed a well defined layered structure with fairly sharp interfaces and good crystalline quality. It also showed that the first few layers of the film (closest to the substrate) are uneven, most probably due to the initial growth pattern of the epitaxial film where growth occurs first in isolated islands that eventually growth and coalesce. The X-ray diffraction measurement determined the elastic strain and strain relief in the alloy layers of the film and the elastic strain in the intervening Si layers.

  20. Gelled MMH hypergolic droplet investigation

    NASA Astrophysics Data System (ADS)

    Solomon, Yair

    Gelled propellants are promising candidates for certain future rocket applications, offering potential improvements in performance and/or safety over conventional liquid and solid systems. In particular, gelled hypergolic propellants can eliminate some handling difficulties by reducing leakage hazard. Before such systems can be developed, however, a fundamental understanding of combustion of the gel droplet is required. This study addresses the combustion behavior of monomethyl hydrazine (MMH) droplet gelled with both hydroxypropyl cellulose (HPC) and fumed silica in an environment of gaseous nitrogen dioxide. All MMH/HPC gel droplets displayed swelling and jetting that are typical to hydrocarbon gels with an organic gelling agent. Burning rates were measured for droplet diameters from 1.8 to 3.2 mm at three ambient pressures of 1.72, 2.06 and 2.89 bar. It was found that the droplet burning rate is dependent on the droplet diameter similarly to liquid MMH. Over the investigated pressure range, no dependence of burning rate on pressure was found. The combustion of MMH/HPC gel was compared to MMH/tetraglyme to examine the influence the type of gelling agent. Droplets of MMH and liquid tetraglyme showed increasing swelling frequencies and volume fluctuations during combustion while the MMH and HPC droplets exhibited a more constant burning history. The MMH/Silica gels showed a different combustion mechanism with the formation of a rigid silica structure, micro-explosions, and up to a 50% reduction in droplet volume during combustion.

  1. Quantitative investigations of aggregate systems.

    PubMed

    Rai, D K; Beaucage, G; Jonah, E O; Britton, D T; Sukumaran, S; Chopra, S; Gonfa, G Goro; Härting, M

    2012-07-28

    Nanomaterials with disordered, ramified structure are increasingly being used for applications where low cost and enhanced performance are desired. A particular example is the use in printed electronics of inorganic conducting and semiconducting nanoparticles. The electrical, as well as other physical properties depend on the arrangement and connectivity of the particles in such aggregate systems. Quantification of aggregate structure and development of structure/property relationships is difficult and progress in the application of these materials in electronics has mainly been empirical. In this paper, a scaling model is used to parameterize the structure of printed electronic layers. This model has chiefly been applied to polymers but surprisingly it shows applicability to these nanolayers. Disordered structures of silicon nanoparticles forming aggregates are investigated using small angle x-ray scattering coupled with the scaling model. It is expected that predictions using these structural parameters can be made for electrical properties. The approach may have wide use in understanding and designing nano-aggregates for electronic devices. PMID:22852622

  2. Analytical investigation of conical diffusers

    NASA Technical Reports Server (NTRS)

    Means, J. L.; Glance, P. C.; Klassen, H. A.

    1972-01-01

    A study was made to determine if existing data for straight-channel single-plane divergence diffusers together with boundary-layer methods could be practically employed to predict conical diffuser performance in the high-speed flow regime. A semiempirical correlation technique, which uses the experimental performance of a straight-channel single-plane divergence diffuser, and a momentum integral boundary-layer method were employed to predict conical diffuser performance. Neither of these methods is applicable when the boundary layer separates. The momentum integral method was used to study the relative importance of various boundary layer parameters in correlating unstalled diffuser performance. Other investigators have found that the best diffuser performance occurs when the diffuser is operating in the transitory stall regime. Since the analytical methods presented in this report are not applicable after the point of boundary-layer separation, a criterion was established from examination of experimental tests which allows the designer to ascertain approximate diffuser performance in the transitory stall regime.

  3. Predictive biomarkers investigated in glioblastoma.

    PubMed

    Tabouret, Emeline; Chinot, Olivier; Sanson, Marc; Loundou, Anderson; Hoang-Xuan, Khê; Delattre, Jean-Yves; Idbaih, Ahmed

    2014-09-01

    Glioblastoma is the most aggressive primary brain tumor in adults. Consequently, new therapeutic strategies are needed. Tumor response to cytotoxic chemotherapy is heterogeneous across patients. Interestingly, predictive biomarkers of response to these classic chemotherapeutic agents have been identified in neuro-oncology (i.e., 1p/19q co-deletion, IDH mutation and O6-methylguanine DNA-methyltransferase promoter methylation). The most emblematic biomarker in glioblastoma is O6-methylguanine DNA-methyltransferase promoter methylation that predicts response to temozolomide. In parallel, innovative drugs are emerging. Some of these agents have shown some activity but in a limited number of glioblastoma patients. One of the major challenges is to identify molecular predictors of response to these smart drugs for an efficient personalized medicine. These novel agents have been tested in clinical trials enrolling glioblastoma patients. Although none of them has been validated prospectively in Phase III clinical trials, interesting molecular predictors of response to these drugs have been investigated and are presented in this review, which also reports more advanced biomarkers. PMID:25096963

  4. Experimental investigation of coal spalling

    SciTech Connect

    Upadhye, R.S.; Field, J.E.; Fields, D.B.; Britten, J.A.; Thorsness, C.B.

    1986-07-01

    The concept of roof spalling has been widely used to develop models of underground coal gasification (UCG) phenomena. Under this concept, dried and pyrolyzed coal at the cavity roof weakens, leading to a steady shower of small pieces of char, which are then gasified in a rubble bed by reactive gases such as oxygen and steam. To explain the assumed spalling, various mechanisms have been invoked, including thermal stresses in the coal/char. However, a mechanistic demonstration of coal spalling has hitherto not been made. The purpose of this paper is to present a limited experimental investigation of the coal spalling concept. We heated cylinder blocks (nominal size 7'' diameter, 5'' height) of sub-bituminous coals to temperatures expected in UCG cavities (about 700 C) using a steady stream of hot (about 800 C) inert gas for various periods of time in an apparatus designed for this purpose. We present and discuss the results of these experiments. We conclude, on the basis of these experiments, the spalling does not occur on the scale of these experiments for western coals. 7 refs., 3 figs., 3 tabs.

  5. Experimental investigations of elastohydrodynamic lubrication

    NASA Technical Reports Server (NTRS)

    Hamrock, B. J.; Dowson, D.

    1983-01-01

    Various experimental studies of elastohydrodynamic lubrication have been reviewed. The various types of machines used in these investigations, such as the disc, two and four ball, crossed-cylinders, and crossed-axes rolling disc machine, are described. The measurement of the most important parameters, such as film shape, film thickness, pressure, temperature, and traction, is considered. Determination of the film thickness is generally the most important of these effects since it dictates the extent to which the asperities on opposing surfaces can come into contact and thus has a direct bearing on wear and fatigue failure of the contacting surfaces. Several different techniques for measuring film thickness have been described, including electrical resistance, capacitance, X-ray, optical interferometry, laser beam diffraction, strain gage, and spring dynamometer methods. An attempt has been made to describe the basic concepts and limitations of each of these techniques. These various methods have been used by individual researchers, but there is no universally acceptable technique for measuring elastohydrodynamic film thickness. Capacitance methods have provided most of the reliable data for nominal line or rectangular conjunctions, but optical interferometry has proved to be the most effective procedure for elliptical contacts. Optical interferometry has the great advantage that it reveals not only the film thickness, but also details of the film shape over the complete area of the conjunction.

  6. Paleoseismic investigations in South Carolina

    SciTech Connect

    Talwani, P.; Rajendran, C.P. (Univ. of South Carolina, Columbia, SC (United States). Dept. of Geological Sciences)

    1992-01-01

    In the last decade paleoseismological investigations have been carried out in South Carolina by USC, USGS, and EBASCO. The results of these have led to the detection of over 50 paleoliquefaction features. These are concentrated in the meizoseismal area of the 1886 Charleston earthquake, in the Myrtle Beach-Georgetown area (about 100 km NE of Charleston) and in the Bluffton Hilton Head area (about 100 SW of Charleston). At each location several liquefaction features have been discovered and dated. Radiocarbon dates suggest the occurrence of at least 6 and possibly 7 events in the SC Coastal Plain during the Holocene. In the Bluffton area several locations were associated with events dated at 600, 1,200, 2,200, 3,200, and 5,000 YBP. The 600, 1,200, 3,200, and 5,000 YBP dates were also observed at Charleston. In the northern sites several features dated at 600, 1,200, and 1,800 YBP. The 1,800 YBP event was observed only at the northern site and the 2,200 YBP event only at the southern site. These observations suggest that two sources other than Charleston may have been active in the Holocene, one located 100 km to the NE and another 100 km SW of Charleston.

  7. Phoenix soil physical properties investigation

    NASA Astrophysics Data System (ADS)

    Shaw, Amy; Arvidson, Raymond E.; Bonitz, Robert; Carsten, Joseph; Keller, H. U.; Lemmon, Mark T.; Mellon, Michael T.; Robinson, Matthew; Trebi-Ollennu, Ashitey

    2009-12-01

    The Phoenix Lander investigated the polygonal terrain and associated soil and icy soil deposits of a high northern latitude site on Mars. The soil physical properties component involved the analysis of force data determined from motor currents from the Robotic Arm (RA)'s trenching activity. Using this information and images of the landing site, soil cohesion and angle of internal friction were determined. Dump pile slopes were used to determine the angle of internal friction of the soil: 38° ± 5°. Additionally, an excavation model that treated walls and edges of the scoop as retaining walls was used to calculate mean soil cohesions for several trenches in the Phoenix landing site workspace. These cohesions were found to be consistent with the stability of steep trench slopes. Cohesions varied from 0.2 ± 0.4kPa to 1.2 ± 1.8 kPa, with the exception of a subsurface platy horizon unique to a shallow trough for which cohesion will have to be determined using other methods. Soil on polygon mounds had the greatest cohesion (1.2 ± 1.8 kPa). This was most likely due to the presence of adsorbed water or pore ice above the shallow icy soil surface. Further evidence for enhanced cohesion above the ice table includes lateral increase in excavation force, by over 30 N, as the RA approached ice.

  8. The Galileo plasma wave investigation

    NASA Technical Reports Server (NTRS)

    Gurnett, D. A.; Kurth, W. S.; Shaw, R. R.; Roux, A.; Gendrin, R.; Kennel, C. F.; Scarf, F. L.; Shawhan, S. D.

    1992-01-01

    The purpose of the Galileo plasma wave investigation is to study plasma waves and radio emissions in the magnetosphere of Jupiter. The plasma wave instrument uses an electric dipole antenna to detect electric fields, and two search coil magnetic antennas to detect magnetic fields. The frequency range covered is 5 Hz to 5.6 MHz for electric fields and 5 Hz to 160 kHz for magnetic fields. Low time-resolution survey spectrums are provided by three on-board spectrum analyzers. In the normal mode of operation the frequency resolution is about 10 percent, and the time resolution for a complete set of electric and magnetic field measurements is 37.33 s. High time-resolution spectrums are provided by a wideband receiver. The wideband receiver provides waveform measurements over bandwidths of 1, 10, and 80 kHz. Compared to previous measurements at Jupiter this instrument has several new capabilities. These new capabilities include (1) both electric and magnetic field measurements to distinguish electrostatic and electromagnetic waves, (2) direction finding measurements to determine source locations, and (3) increased bandwidth for the wideband measurements.

  9. Investigation of Cr etch kinetics

    NASA Astrophysics Data System (ADS)

    Wu, Banqiu

    2003-12-01

    Studies on Cr etch and its kinetics were carried out using a 50KeV photomask e-beam writing system, an ICP plasma etcher, chemically amplified resist (CAR), and a scanning electron microscope (SEM) metrology tool. A Cr etch rate equation was developed, showing good agreement with experimental data. Both the theoretical rate equation and experimental results showed that the main Cr etch rate effect parameters were oxygen mass flow rate, oxygen partial pressure, and ICP power. It was found that pressure plays a very important role in critical dimension (CD) uniformity etch contribution, loading effects, isolated/dense (I/D) etch CD bias, and etch CD movement. Etch kinetic information was found to be very helpful for improving CD uniformity, reducing pattern (local loading) effects, and controlling CD movement at the etch step. Some obsolete-pattern photomasks were used in the kinetic study. The main advantages of using obsolete photomasks include reducing resist effects on Cr etch rate investigation, obtaining much more etch kinetics data, and significantly lowering process development costs normally incurred from lithography tool time and raw photomask material consumption.

  10. Investigation of Persembe Yenikoy Landslide

    NASA Astrophysics Data System (ADS)

    Kayahan, A.; Ikizler, S. B.; Ang?n, Z.; Demir, G.; Suba??, E.

    2012-04-01

    In the last two years, the province of Ordu located in central part of the Black Sea Region (on the border of Eastern Black Sea region) has experienced heavy rainfalls that have caused floods and landslides. A landslide occurred in 19 August 2011 in Persembe district of Ordu. It has been named as Persembe Yenikoy (a village of Persembe) landslide. The landslide, triggered by heavy rainfall swept away a huge area of about 4-5 times a football ground. It caused collapse of a house and 2 people died. Besides, 9 houses were affected and evacuated. In this study, disturbed and undisturbed samples have been taken from the area and several laboratory tests have been carried on these samples to investigate the geotechnical properties of the soil profile and explain the reasons of the landslide. Soil profile in the area consists of silt of high plasticity (MH). The results of the laboratory tests have been presented and finite element analysis with Plaxis 2D has been performed for modeling of the landslide. The results may be used in landslide analysis in the regions having similar soil characteristics and site conditions. They will be presented to the local authorities to assess landslide prone areas and prevent similar damages and live losses in the future. Key Words: Landslides, Rainfall, Ordu, Turkey

  11. 32 CFR 154.24 - Prior investigations conducted by DoD investigative organizations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Prior investigations conducted by DoD investigative...Reciprocal Acceptance of Prior Investigations and Personnel Security Determinations § 154.24 Prior investigations conducted by DoD...

  12. Introducing The Process of Investigative Science

    NSDL National Science Digital Library

    Linda Akiyama

    2012-03-22

    Students are introduced to the process of investigative science through a guided inquiry activity. Given a testable question and materials, students as a class make predictions, and design an investigation with guidance from the teacher. Then in pairs, students do the investigation, collect data, draw conclusions, and discuss ways to improve on the investigative design. After this activity, students will be able to develop independent investigations in this and other subject areas

  13. The MAVEN Magnetic Field Investigation

    NASA Astrophysics Data System (ADS)

    Connerney, J. E. P.; Espley, J.; Lawton, P.; Murphy, S.; Odom, J.; Oliversen, R.; Sheppard, D.

    2015-06-01

    The MAVEN magnetic field investigation is part of a comprehensive particles and fields subsystem that will measure the magnetic and electric fields and plasma environment of Mars and its interaction with the solar wind. The magnetic field instrumentation consists of two independent tri-axial fluxgate magnetometer sensors, remotely mounted at the outer extremity of the two solar arrays on small extensions ("boomlets"). The sensors are controlled by independent and functionally identical electronics assemblies that are integrated within the particles and fields subsystem and draw their power from redundant power supplies within that system. Each magnetometer measures the ambient vector magnetic field over a wide dynamic range (to 65,536 nT per axis) with a resolution of 0.008 nT in the most sensitive dynamic range and an accuracy of better than 0.05 %. Both magnetometers sample the ambient magnetic field at an intrinsic sample rate of 32 vector samples per second. Telemetry is transferred from each magnetometer to the particles and fields package once per second and subsequently passed to the spacecraft after some reformatting. The magnetic field data volume may be reduced by averaging and decimation, when necessary to meet telemetry allocations, and application of data compression, utilizing a lossless 8-bit differencing scheme. The MAVEN magnetic field experiment may be reconfigured in flight to meet unanticipated needs and is fully hardware redundant. A spacecraft magnetic control program was implemented to provide a magnetically clean environment for the magnetic sensors and the MAVEN mission plan provides for occasional spacecraft maneuvers—multiple rotations about the spacecraft x and z axes—to characterize spacecraft fields and/or instrument offsets in flight.

  14. An investigation of heparinase immobilization.

    PubMed

    Bernstein, H; Yang, V C; Langer, R

    1987-01-01

    A systematic investigation of the parameters that affect the efficiency of immobilizing heparinase onto cyanogen bromide activated crosslinked 8% agarose beads was conducted. Two experimental measures, the "fraction bound" and the "fraction retained," were used to monitor the coupling efficiency. The fraction bound is the portion of the total initial enzyme that is bound to the agarose gel. The fraction retained is the fraction of bound enzyme that is active. The product of the two measures indicates the coupling efficiency. The activity of the immobilized heparinase was measured under conditions free of both internal and external mass transfer limitations, and thus, the fraction retained represents the true immobilized enzyme activity. Increasing the degree of activation of the beads results in an increase in the fraction bound, the fraction retained, and consequently, the coupling efficiency. As the ratio of enzyme solution to gel volume increases from 1.5 to 2.2, the fraction bound remains constant but the fraction retained decreases (heparinase concentration; 0.15 mg/mL and degree of activation; 9.5 mumol of cyanate esters/g of gel). At volume ratios greater than 2.2, both the fraction bound and the fraction retained decline continuously. Changing the heparinase concentration in the coupling solution changes the coupling efficiency in a manner similar to that of the volume ratio change. When heparin is added during the coupling process, the fraction bound declines as the heparin concentration increases, whereas the fraction retained increases up to a heparin concentration of 12 mg/mL and decreases thereafter. When arginine, lysine, and glycine are used to block the unreacted cyanate ester groups after the coupling process, the immobilized heparinase shows different pH optima of 6.5, 6.9, and 7.2, respectively. Based upon these findings, a protocol to optimize heparinase immobilization is developed. PMID:3504126

  15. Numerical Investigation of Circumplanetary Disks

    NASA Astrophysics Data System (ADS)

    Mitchell, Tyler R.; Stewart, G. R.

    2012-10-01

    The regular satellites of Jupiter and Saturn are believed to have formed in circumplanetary disks that were present during the late stages of giant planet formation. At present, there is a large amount of uncertainly in both the structure of these disks and the nature of angular momentum transport within them. In circumstellar disks, magnetorotational rotational instability (MRI) is generally invoked as a mechanism to transfer angular momentum and drive accretion. It is unclear whether circumplanetary disks are sufficiently ionized for the MRI to be active. In an effort to better understand the physical nature of circumplanetary disks, we present 1+1D numerical models of Jovian and Saturnian circumplanetary disks. Our models include viscous diffusion, infall from the solar nebula and external photoevaporation. The combination of these three processes allow for steady-state, truncated disks roughly consistent with the present state of the regular satellite systems of Jupiter and Saturn (Mitchell & Stewart, 2011). Unlike recent models of tidal truncation (Martin & Lubow, 2010), our initial models showed that photoevaporation is able to truncate circumplanetary disks to a small fraction of the Hill radius. One goal of this work is to verify our previous results and confirm that truncated disks can be formed using models with more realistic viscous processes. In order to simplify the problem, our initial models employed a viscosity that was linearly dependent on radius. Our current disk models use a viscosity that is calculated locally based on the midplane temperature that is determined from detailed vertical structure calculations. These models are used to conduct an initial investigation of the viability of an active MRI as well as baroclinic instability and other instabilities that may exist.

  16. Structural investigation of graphitic foam

    NASA Astrophysics Data System (ADS)

    Mukhopadhyay, S. M.; Mahadev, N.; Joshi, P.; Roy, A. K.; Kearns, K. M.; Anderson, D. P.

    2002-03-01

    Structural and chemical characteristics of pitch-based graphitic foam have been studied using scanning electron microscopy, transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy. Chemically, the carbon atoms in these materials are found to have identical bonding states as those in pure graphite single crystals. Microstructural studies indicate that they have a cellular morphology with the cell walls made up of graphitic layers. The walls can be smooth or stepped depending upon the orientation of graphitic layers with respect to the cells. Ligaments between neighboring cells and junctions of ligaments (corners of three or more cells) distinctly show layers of graphitic planes, irregular flakes, and beam-like protruding structures made up of folded layers of graphite. The network of interconnecting pores have openings on the cell walls that have ruptured edges and sharp corners. This indicates that they were formed after hardening of the precursor, resulting in brittle fracture of the walls. The sharp cracks at pore openings may enhance mechanical failure of these structures and attempts to minimize them may improve mechanical behavior. Higher magnification studies in the TEM indicate the presence of flaky layers of graphite crystals and also long tubular structures protruding from the cell walls and ligaments. These fibrous structures (possibly rolled stacks of graphitic planes) have lengths in excess of several microns and diameters ranging between several tens of nanometers to several hundred nanometers. The walls are thick: several tens of nanometers. These structures, intermediate in size between micron size graphitic fibers and nanometer size multiwalled "nanotubes," have been discussed in light of other well investigated graphitic structures.

  17. The MAVEN Magnetic Field Investigation

    NASA Technical Reports Server (NTRS)

    Connerney, J. E. P.; Espley, J.; Lawton, P.; Murphy, S.; Odom, J.; Oliversen, R.; Sheppard, D.

    2014-01-01

    The MAVEN magnetic field investigation is part of a comprehensive particles and fields subsystem that will measure the magnetic and electric fields and plasma environment of Mars and its interaction with the solar wind. The magnetic field instrumentation consists of two independent tri-axial fluxgate magnetometer sensors, remotely mounted at the outer extremity of the two solar arrays on small extensions ("boomlets"). The sensors are controlled by independent and functionally identical electronics assemblies that are integrated within the particles and fields subsystem and draw their power from redundant power supplies within that system. Each magnetometer measures the ambient vector magnetic field over a wide dynamic range (to 65,536 nT per axis) with a quantization uncertainty of 0.008 nT in the most sensitive dynamic range and an accuracy of better than 0.05%. Both magnetometers sample the ambient magnetic field at an intrinsic sample rate of 32 vector samples per second. Telemetry is transferred from each magnetometer to the particles and fields package once per second and subsequently passed to the spacecraft after some reformatting. The magnetic field data volume may be reduced by averaging and decimation, when necessary to meet telemetry allocations, and application of data compression, utilizing a lossless 8-bit differencing scheme. The MAVEN magnetic field experiment may be reconfigured in flight to meet unanticipated needs and is fully hardware redundant. A spacecraft magnetic control program was implemented to provide a magnetically clean environment for the magnetic sensors and the MAVEN mission plan provides for occasional spacecraft maneuvers - multiple rotations about the spacecraft x and z axes - to characterize spacecraft fields and/or instrument offsets in flight.

  18. Athena Mars rover science investigation

    USGS Publications Warehouse

    Squyres, S.W.; Arvidson, R.E.; Baumgartner, E.T.; Bell, J.F., III; Christensen, P.R.; Gorevan, S.; Herkenhoff, K.E.; Klingelhofer, G.; Madsen, M.B.; Morris, R.V.; Rieder, R.; Romero, R.A.

    2003-01-01

    Each Mars Exploration Rover carries an integrated suite of scientific instruments and tools called the Athena science payload. The primary objective of the Athena science investigation is to explore two sites on the Martian surface where water may once have been present, and to assess past environmental conditions at those sites and their suitability for life. The remote sensing portion of the payload uses a mast called the Pancam Mast Assembly (PMA) that provides pointing for two instruments: the Panoramic Camera (Pancam), and the Miniature Thermal Emission Spectrometer (Mini-TES). Pancam provides high-resolution, color, stereo imaging, while Mini-TES provides spectral cubes at mid-infrared wavelengths. For in-situ study, a five degree-of-freedom arm called the Instrument Deployment Device (IDD) carries four more tools: a Microscopic Imager (MI) for close-up imaging, an Alpha Particle X-Ray Spectrometer (APXS) for elemental chemistry, a Mo??ssbauer Spectrometer (MB) for the mineralogy of Fe-bearing materials, and a Rock Abrasion Tool (RAT) for removing dusty and weathered surfaces and exposing fresh rock underneath. The payload also includes magnets that allow the instruments to study the composition of magnetic Martian materials. All of the Athena instruments have undergone extensive calibration, both individually and using a set of geologic reference materials that are being measured with all the instruments. Using a MER-like rover and payload in a number of field settings, we have devised operations processes that will enable us to use the MER rovers to formulate and test scientific hypotheses concerning past environmental conditions and habitability at the landing sites. Copyright 2003 by the American Geophysical Union.

  19. Investigating Reaction-Driven Cracking

    NASA Astrophysics Data System (ADS)

    Kelemen, P. B.; Hirth, G.; Savage, H. M.

    2013-12-01

    Many metamorphic reactions lead to large volume changes, and potentially to reaction-driven cracking [1,2]. Large-scale hydration of mantle peridotite to produce serpentine or talc is invoked to explain the rheology of plate boundaries, the nature of earthquakes, and the seismic properties of slow-spread ocean crust and the 'mantle wedge' above subduction zones. Carbonation of peridotite may be an important sink in the global carbon cycle. Zones of 100% magnesite + quartz replacing peridotite, up to 200 m thick, formed where oceanic mantle was thrust over carbonate-bearing metasediments in Oman. Talc + carbonate is an important component of the matrix in subduction mélanges at Santa Catalina Island , California, and the Sanbagawa metamorphic belt, Japan. Engineered systems to emulate natural mineral carbonation could provide relatively inexpensive CO2 capture and storage [3]. More generally, engineered reaction-driven cracking could supplement or replace hydraulic fracture in geothermal systems, solution mining, and extraction of tight oil and gas. The controls on reaction-driven cracking are poorly understood. Hydration and carbonation reactions can be self-limiting, since they potentially reduce permeability and armor reactive surfaces [4]. Also, in some cases, hydration or carbonation may take place at constant volume. Small changes in volume due to precipitation of solid products increases stress, destabilizing solid reactants, until precipitation and dissolution rates become equal at a steady state stress [5]. In a third case, volume change due to precipitation of solid products causes brittle failure. This has been invoked on qualitative grounds to explain, e.g., complete serpentinization of mantle peridotite [6]. Below ~ 300°C, the available potential energy for hydration and carbonation of olivine could produce stresses of 100's of MPa [2], sufficient to fracture rocks to 10 km depth or more, causing brittle failure below the steady state stress required for constant volume replacement. Natural examples have fracture energy densities due to strain energy density of 100's of MPa [2]. Despite theory and observation, until now lab experiments on peridotite hydration and carbonation have not produced reaction-driven cracking. Slow kinetics and limited reactive surface area in low porosity samples may be the cause. Also, maximum stress may be limited by 'disjoining pressure', above which nano-films along grain boundaries collapse, and crystal growth essentially ceases [7]. To address these issues, we've begun experiments on analog materials with fast reaction rates, e.g., CaO + H2O = Ca(OH)2, to efficiently investigate the role of confining pressure and other factors on reaction-driven fracture events. Intriguingly, commercially available 'demolition mortar', largely CaO, produces stresses of 70 MPa or more around 1 inch bore holes at room T and P [8], even though there is a free surface at the top of the borehole, and hydration in a 'closed' system creates ~ 40% air-filled pore space. [1] Jamtveit et al EPSL 08 [2] Kelemen & Hirth EPSL 12 [3] Kelemen et al AREPS 11 [4] Aharonov et al JGR 98 [5] Fletcher & Merino GCA 01 [6] Macdonald & Fyfe T'phys 85 [7] Espinosa-Marzal & Scherer GSL Special Papers 10 [8] Laefer et al Mag Concrete Res 10

  20. FINANCIAL DISCLOSURE FORM Name of Investigator ____________________________________________________ Date __________________

    E-print Network

    O'Laughlin, Jay

    FINANCIAL DISCLOSURE FORM Name of Investigator stocks or stock options in which the Investigators' holdings exceed $10,000. 2. List the sources of all right is received. 4. List any other financial interests in business enterprises or entities

  1. Cancer Clinical Investigator Team Leadership Award (CCITLA)

    Cancer.gov

    NCI’s Cancer Clinical Investigator Team Leadership Awards (CCITLAs) recognize mid-career clinical investigators at NCI-designated Cancer Centers working to improve the lives of people with cancer through clinical trials.

  2. 29 CFR 24.104 - Investigation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...STATUTES AND SECTION 211 OF THE ENERGY REORGANIZATION ACT OF 1974...Solid Waste Disposal Act; Clean Air Act; and Comprehensive...f) Investigation under the Energy Reorganization Act. In addition...to investigations under the Energy Reorganization Act....

  3. 29 CFR 24.104 - Investigation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...STATUTES AND SECTION 211 OF THE ENERGY REORGANIZATION ACT OF 1974...Solid Waste Disposal Act; Clean Air Act; and Comprehensive...f) Investigation under the Energy Reorganization Act. In addition...to investigations under the Energy Reorganization Act....

  4. 29 CFR 24.104 - Investigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...STATUTES AND SECTION 211 OF THE ENERGY REORGANIZATION ACT OF 1974...Solid Waste Disposal Act; Clean Air Act; and Comprehensive...f) Investigation under the Energy Reorganization Act. In addition...to investigations under the Energy Reorganization Act....

  5. 77 FR 39101 - Rules Relating to Investigations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-29

    ...with the Bureau's mission to protect consumers by investigating potential violations...investigating compliance with the Federal consumer financial laws, which benefits consumers by creating a systematic process to protect them from unlawful...

  6. Investigating Processes of Sedimentation in Gravel Pits

    NSDL National Science Digital Library

    Melissa Olson

    This is a field investigation where students will explore and observe sediments within a local gravel pit and from their observation create an investigation that will help to determine the nature of the sediments.

  7. 40 CFR 1620.4 - Investigations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Investigations. 1620.4 Section 1620.4 Protection of Environment CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD ADMINISTRATIVE CLAIMS ARISING UNDER THE FEDERAL TORT CLAIMS ACT § 1620.4...

  8. 40 CFR 1620.4 - Investigations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Investigations. 1620.4 Section 1620.4 Protection of Environment CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD ADMINISTRATIVE CLAIMS ARISING UNDER THE FEDERAL TORT CLAIMS ACT § 1620.4...

  9. 40 CFR 1620.4 - Investigations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Investigations. 1620.4 Section 1620.4 Protection of Environment CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD ADMINISTRATIVE CLAIMS ARISING UNDER THE FEDERAL TORT CLAIMS ACT § 1620.4...

  10. 40 CFR 1620.4 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Investigations. 1620.4 Section 1620.4 Protection of Environment CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD ADMINISTRATIVE CLAIMS ARISING UNDER THE FEDERAL TORT CLAIMS ACT § 1620.4...

  11. 40 CFR 1620.4 - Investigations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Investigations. 1620.4 Section 1620.4 Protection of Environment CHEMICAL SAFETY AND HAZARD INVESTIGATION BOARD ADMINISTRATIVE CLAIMS ARISING UNDER THE FEDERAL TORT CLAIMS ACT § 1620.4...

  12. A Classroom Investigation into the Catenary

    ERIC Educational Resources Information Center

    Staples, Ed

    2011-01-01

    The quest to find the equation of a catenary makes an ideal investigation for upper secondary students. In the modelling exercise that follows, no knowledge of calculus is required to gain a fairly good understanding of the nature of the curve. This investigation is best described as a scientific investigation--a "hands on" experience that…

  13. Characterising the Cognitive Processes in Mathematical Investigation

    ERIC Educational Resources Information Center

    Yeo, Joseph B. W.; Yeap, Ban Har

    2010-01-01

    Many educators believe that mathematical investigation involves both problem posing and problem solving, but some teachers have taught their students to investigate during problem solving. The confusion about the relationship between investigation and problem solving may affect how teachers teach their students and how researchers conduct their…

  14. Integrating the Sciences to Investigate Groundwater Pollution

    ERIC Educational Resources Information Center

    Grady, Julie R.; Madden, Andrew S.

    2010-01-01

    Investigations that integrate concepts from geological sciences with biology and chemistry are rare. The authors present an investigation that introduces high school students to microbe-mineral interactions by tying together anaerobic respiration, reduction reactions, metal ion solubility, and groundwater pollution. During the investigation,…

  15. Stanford University Sponsor-Investigator Research Requirements

    E-print Network

    Puglisi, Joseph

    to evaluate compliance with the FDA regulatory requirements, will be conducted on at least an annual basis investigator holds the IND) GUI-3m 1/2 GUI01003 rev5 10/11 Research Compliance Office Definitions Sponsor the investigational drug is administered or dispensed. Investigational New Drug (IND): A drug permitted by the FDA

  16. Kinesthetic Investigations in the Physics Classroom

    ERIC Educational Resources Information Center

    Whitworth, Brooke A.; Chiu, Jennifer L.; Bell, Randy L.

    2014-01-01

    Creating investigations that allow students to see physics in their everyday world and to be kinesthetically active outside of the traditional physics classroom can be incredibly engaging and effective. The investigations we developed were inquiry investigations in which students engaged in concrete experiences before we discussed the abstract…

  17. BIM Anatomy An investigation into implementation prerequisites

    E-print Network

    BIM Anatomy An investigation into implementation prerequisites Martin Hooper #12;BIM Anatomy Title: BIM Anatomy An investigation into implementation prerequisites Published: 2012 Design SE221 00 Lund Sweden Tel: +46 (0)46 222 48 63 #12;BIM Anatomy: An investigation

  18. An Extended Model of Cybercrime Investigations

    Microsoft Academic Search

    Seamus O. Ciardhuáin

    2004-01-01

    A comprehensive model of cybercrime investigations is important for standardising terminology, defining requirements, and supporting the development of new techniques and tools for investigators. In this paper a model of investigations is presented which combines the existing models, generalises them, and extends them by explicitly addressing certain activities not included in them. Unlike previous models, this model explicitly represents the

  19. Geophysical investigations of certain Montana geothermal areas

    SciTech Connect

    Wideman, C.J. (Montana Bureau of Mines and Geology, Butte); Dye, L.; Halvorson, J.; McRae, M.; Ruscetta, C.A.; Foley, D. (eds.)

    1981-05-01

    Selected hot springs areas of Montana have been investigated by a variety of geophysical techniques. Resistivity, gravity, seismic, and magnetic methods have been applied during investigations near the hot springs. Because the geology is extremely varied at the locations of the investigations, several geophysical techniques have usually been applied at each site.

  20. 78 FR 27116 - Draft Guidance for Industry on Charging for Investigational Drugs Under an Investigational New...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-09

    ...Access to Investigational Drugs for Treatment Use...for an investigational drug and the types of costs that can be recovered...charging for investigational drug under an IND. This draft...regulations. II. Paperwork Reduction Act of 1995 This...

  1. Geologic Field Investigation: Investigating Coastal Features of Western Lake Superior, Inferring Possibilities of their Origins

    NSDL National Science Digital Library

    Paul Davis

    This geologic investigation will have students observing and investigating coastal features of Western Lake Superior using inquiry-based investigable questions, and inferring possibilities of the coastal features' origins.

  2. Medicolegal death investigator preemployment test development.

    PubMed

    Jentzen, J M; Clark, S C; Ernst, M F

    1996-06-01

    The medicolegal death investigator (MDI) represents an essential component in the multidisciplinary investigation of sudden and unexpected deaths. Presently there exists no specific program for the job training evaluation procedure for new (MDI) employees. We discuss the development of a medicolegal death investigator preemployment training tool, which consists of a training and evaluation program containing a list of tasks and task steps. After the investigator demonstrates the ability to perform individual tasks independently, the trainee will be objectively evaluated by the completion of a written test specifically designed to cover the task items. The preemployment test has been developed by those professionals best able to determine the job requirements, the death investigators. The specific outcomes of the process also include further definition of the profession, preemployment testing, policy and procedure development, posttraining evaluation, identification of training needs, curriculum design and further professional development, and identification of the profession of death investigator. PMID:8727285

  3. Concept Mapping for Digital Forensic Investigations

    NASA Astrophysics Data System (ADS)

    Tanner, April; Dampier, David

    Research in digital forensics has yet to focus on modeling case domain information involved in investigations. This paper shows how concept mapping can be used to create an excellent alternative to the popular checklist approach used in digital forensic investigations. Concept mapping offers several benefits, including creating replicable, reusable techniques, simplifying and guiding the investigative process, capturing and reusing specialized forensic knowledge, and supporting training and knowledge management activities. The paper also discusses how concept mapping can be used to integrate case-specific details throughout the investigative process.

  4. 48 CFR 750.7110-1 - Investigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...DEVELOPMENT CONTRACT MANAGEMENT EXTRAORDINARY CONTRACTUAL ACTIONS Extraordinary Contractual Actions To Protect Foreign Policy Interests of the United States 750.7110-1 Investigation. The Evaluation Division of the...

  5. 48 CFR 750.7110-1 - Investigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...DEVELOPMENT CONTRACT MANAGEMENT EXTRAORDINARY CONTRACTUAL ACTIONS Extraordinary Contractual Actions To Protect Foreign Policy Interests of the United States 750.7110-1 Investigation. The Evaluation Division of the...

  6. Investigations of Electrostatic in a Collisionless Plasma

    E-print Network

    Risø-R-417 Investigations of Electrostatic Ion Waves in a Collisionless Plasma Poul Michelsen Risø IN A COLLISIONLESS PLASMA BY POUL MICHELSEN #12;RISØ-R-417 INVESTIGATIONS OF ELECTROSTATIC ION WAVES IN A COLLISIONLESS PLASMA Poul Michelsen Abstract. This report reviews a series of publications concern- ing

  7. Schools and Teachers Supporting Student Open Investigations

    ERIC Educational Resources Information Center

    Symington, David; Tytler, Russell

    2011-01-01

    This paper draws on a study of the BHP Billiton Science Awards to explore the ways in which open investigation work occurs in schools. The research used interviews with teachers and students and state organisers to develop a picture of what happens on the ground in running student open investigations, and to trace how schools have built a culture…

  8. Cancer Cluster Investigation in a School District.

    ERIC Educational Resources Information Center

    Neuberger, John S.; Pierce, J. Thomas; Lai, Sue Min

    1997-01-01

    Investigated a possible cancer cluster among employees at one elementary school. Results of an industrial hygiene survey and health investigation found a marginally significant increase of risk for breast cancer among females who had worked for the school but no other excess in cancers. There were no significant employee exposures to carcinogens…

  9. 22 CFR 304.6 - Claims investigation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...investigation. 304.6 Section 304.6 Foreign Relations PEACE CORPS CLAIMS AGAINST GOVERNMENT UNDER FEDERAL TORT CLAIMS...investigation. (a) When a claim has been filed with the Peace Corps, the General Counsel will send a copy of the...

  10. A cyber-crime investigation framework

    Microsoft Academic Search

    Vasilios Katos; Peter M. Bednar

    2008-01-01

    Epistemic uncertainty is an unavoidable attribute which is present in criminal investigations and could affect negatively the effectiveness of the process. A cyber-crime investigation involves a potentially large number of individuals and groups who need to communicate, share and make decisions across many levels and boundaries. This paper presents an approach adopting elements of the Strategic Systems Thinking Framework (SST)

  11. Fire investigation: origin, cause and responsibility

    Microsoft Academic Search

    David G. Lilley

    1997-01-01

    Fire investigation involves determining for each fire an “origin” and a “cause”, the former being the location where a fire began (ignited) and the latter being the reason for the co-existence of fuel, oxygen and heat in proportions such as to cause ignition. Fire and arson investigators examine and interpret post-fire evidence so as to ascertain the origin and cause

  12. Stanford University Sponsor-Investigator Research Requirements

    E-print Network

    Puglisi, Joseph

    -investigator as deemed necessary. An on-site compliance audit, designed to evaluate compliance with the FDA regulatory investigator holds the IDE) GUI-5m 1/2 GUI01005 rev6 10/11 Research Compliance Office Definitions Sponsor Device: A device permitted by the FDA to be tested in humans, but not yet determined to be safe

  13. Investigating Child Language Acquisition through Computational Modelling

    Microsoft Academic Search

    Kris Jack; Chris Reed; Annalu Waller

    Current approaches to the computational modelling of language acquisition tend to investigate particular behaviours such as lexical acquisition and the emergence of syntax in isolation from one another. This paper takes a longitudinal approach to modelling, investigating the developmental trajectory of a single model that tackles several learning problems at the same time. In particular, the model learns to associates

  14. UNIVERSITY OF MINNESOTA UMore Park Remedial Investigation

    E-print Network

    Netoff, Theoden

    , the University is committed to working cooperatively with Dakota County, the City of Rosemount, Empire Township with a hard copy available for review at the UMore Park Administration Building in Rosemount. How did and education. Did the Remedial Investigation include investigation of the University of Minnesota Rosemount

  15. MMS 2008-009 Investigations of Chemosynthetic

    E-print Network

    Mathis, Wayne N.

    OCS Study MMS 2008-009 Investigations of Chemosynthetic Communities on the Lower Continental Slope of Mexico OCS Region #12;OCS Study MMS 2008-009 Investigations of Chemosynthetic Communities on the Lower Prepared under MMS Contract 1435-01-05-CT-39187 (M05PC00018) by TDI-Brooks International Inc. 1902 Pinon

  16. Investigating School Leadership Practice: A Distributed Perspective.

    ERIC Educational Resources Information Center

    Spillane, James P.; Halverson, Richard; Diamond, John B.

    2001-01-01

    Argues for scholarship that investigates leadership practice; specifically, the practice of leading classroom instruction. Articulates a distributed perspective, grounded in activity theory and distributed cognition, to frame such investigations. Suggests that school leadership is best understood as a distributed practice stretched over the…

  17. Earth Control and Investigations: Training Course 1974.

    ERIC Educational Resources Information Center

    Department of the Interior, Denver, CO. Engineering and Research Center.

    This document contains the outlines of each of 34 lectures given in the Earth Control and Investigations course sponsored by the Denver Laboratories. Topics covered include construction control of earth dams, canals, and filters; field and laboratory test procedures; soil classification and logging; and field investigations. (DT)

  18. An Investigation of Double Bass Vibrato Characteristics

    ERIC Educational Resources Information Center

    Mick, James

    2015-01-01

    The purpose of this study was to investigate and describe various vibrato characteristics of university double bass students. The primary objectives were: (1) to describe vibrato rate and width for commonly used fingers in first, fourth, and thumb positions; (2) to investigate whether students initiate vibrato in an upward or downward direction;…

  19. 25 Low-Cost Biology Investigations.

    ERIC Educational Resources Information Center

    Beller, Joel

    This book is a compilation of biology labs that are safe, simple, dependable, economical, and diverse. Some of the 25 investigations contained within this book involve organisms that are free for the taking and returned to the environment unharmed following the investigations. Students gain experience in making observations, forming hypotheses,…

  20. Faces are `special'? A. Psychological investigations

    E-print Network

    Behrmann, Marlene

    6/18/12 1 Faces are `special'? A. Psychological investigations 1.Neuropsychological data disproportionately impaired · Failure to derive configural relations B. Neural investigations 1. Role diffusion of water molecules to fiber tracts Isotropic Anisotropic Berenschot, et al., 2004! CSF White

  1. PRINCIPAL INVESTIGATOR Last Name First Name Date

    E-print Network

    PRINCIPAL INVESTIGATOR Last Name First Name Date Institution Street Address City State ZIP Phone E-mail Address SECONDARY INVESTIGATORS Last Name First Name E-mail Address EXPERIMENT DETAILS Title Type Re scientific case (including references) and send to: tuohy@bnl.gov #12;

  2. Investigations of the software testing coupling effect

    Microsoft Academic Search

    A. Jefferson Offutt

    1992-01-01

    Fault-based testing strategies test software by focusing on specific, common types of faults. The coupling effect hypothesizes that test data sets that detect simple types of faults are sensitive enough to detect more complex types of faults. This paper describes empirical investigations into the coupling effect over a specific class of software faults. All of the results from this investigation

  3. Goals, Objectives, and Investigations for Venus Exploration

    E-print Network

    Rathbun, Julie A.

    Goals, Objectives, and Investigations for Venus Exploration May 2014 #12; ii Goals, Objectives, and Investigations for Venus Exploration At the VEXAG meeting in November 2012, it was resolved to update the scientific priorities and strategies for Venus exploration. To achieve this goal, three major

  4. The Enhanced Digital Investigation Process Model

    Microsoft Academic Search

    Venansius Baryamureeba; Florence Tushabe

    2004-01-01

    Computer crimes are on the rise and unfortunately less than two percent of the reported cases result in conviction. The process (methodology and approach) one adopts in conducting a digital forensics investigation is immensely crucial to the outcome of such an investigation. Overlooking one step or interchanging any of the steps may lead to incom- plete or inconclusive results hence

  5. History Scene Investigations: From Clues to Conclusions

    ERIC Educational Resources Information Center

    McIntyre, Beverly

    2011-01-01

    In this article, the author introduces a social studies lesson that allows students to learn history and practice reading skills, critical thinking, and writing. The activity is called History Scene Investigation or HSI, which derives its name from the popular television series based on crime scene investigations (CSI). HSI uses discovery learning…

  6. Fostering new investigators in Reproductive Immunology

    Microsoft Academic Search

    B. Toth; S. Segerer; M. E. Solano; T. Nevers; K. Baumann; B. Y. Gueuvoghlanian-Silva; C. Jago; C. Scholz

    2011-01-01

    During the 8th European Congress of Reproductive Immunology, November 2010 in Munich, Germany, the European Society of Reproductive Immunology provided the opportunity for young investigators to present their work. Short talks from students and post-doctoral trainees were scheduled immediately after the keynote speakers in each session. The Society presented two “Young Investigator Awards” in basic science as well as in

  7. LEWIS SPACECRAFT MISSION FAILURE INVESTIGATION BOARD

    E-print Network

    Rhoads, James

    was the direct result of an implementation of a technically flawed Safe Mode in the Attitude Control System Investigation Board was established to gather and analyze information and determine the facts as to the actual and the contractor in order to determine if they may have contributed to the failure. The investigation process used

  8. The Locust Jump: An Integrated Laboratory Investigation

    ERIC Educational Resources Information Center

    Scott, Jon

    2005-01-01

    The locust is well known for its ability to jump large distances to avoid predation. This class sets out a series of investigations into the mechanisms underlying the jump enabling students to bring together information from biomechanics, muscle physiology, and anatomy. The nature of the investigation allows it to be undertaken at a number of…

  9. NASA Heavy Lift Rotorcraft Systems Investigation

    Microsoft Academic Search

    Wayne Johnson; Gloria K. Yamauchi; Michael E. Watts

    The NASA Heavy Lift Rotorcraft Systems Investigation examined in depth several rotorcraft configurations for large civil transport, designed to meet the technology goals of the NASA Vehicle Systems Program. The investigation identified the Large Civil Tiltrotor as the configuration with the best potential to meet the technology goals. The design presented was economically competitive, with the potential for substantial impact

  10. Predicting Teaching Performance: A Multivariate Investigation.

    ERIC Educational Resources Information Center

    Daniel, Larry G.

    Previous research using various measures of teacher quality has largely failed to investigate the relationships among such assessment measures using multivariate procedures. Multivariate investigations are essential in studies of teacher competence because these methods view various competency variables in the larger contexts to which researchers…

  11. Human Factors in Cabin Accident Investigations

    NASA Technical Reports Server (NTRS)

    Chute, Rebecca D.; Rosekind, Mark R. (Technical Monitor)

    1996-01-01

    Human factors has become an integral part of the accident investigation protocol. However, much of the investigative process remains focussed on the flight deck, airframe, and power plant systems. As a consequence, little data has been collected regarding the human factors issues within and involving the cabin during an accident. Therefore, the possibility exists that contributing factors that lie within that domain may be overlooked. The FAA Office of Accident Investigation is sponsoring a two-day workshop on cabin safety accident investigation. This course, within the workshop, will be of two hours duration and will explore relevant areas of human factors research. Specifically, the three areas of discussion are: Information transfer and resource management, fatigue and other physical stressors, and the human/machine interface. Integration of these areas will be accomplished by providing a suggested checklist of specific cabin-related human factors questions for investigators to probe following an accident.

  12. [Intravenous duodenography: a routine investigation (author's transl)].

    PubMed

    Tavernier, C; Divry, P; Delafolie, A; Regimbau, V

    1975-12-01

    The authors present their experience of intravenous duodenography using tiemonium methyl sulphate which they described in 1963. This simple, regular and safe techniques enables one to obtain at the end of the investigations, a duodenography by first intention, by means of the intravenous injection of tiemonium. Parietal lesions, extrinsic compression of small or large dimension, within the duodenal outline are easily demonstrated. Gastroduodenal investigation must of course be comprised of pictures during collapse, semi-collapse and repletion of the entire duodenal outline; once out of every two times, one has to recourse to intravenous duodenography which has become a routine investigation. PMID:1214237

  13. SRP baseline hydrogeologic investigation: Aquifer characterization

    SciTech Connect

    Strom, R.N.; Kaback, D.S.

    1992-03-31

    An investigation of the mineralogy and chemistry of the principal hydrogeologic units and the geochemistry of the water in the principal aquifers at Savannah River Site (SRS) was undertaken as part of the Baseline Hydrogeologic Investigation. This investigation was conducted to provide background data for future site studies and reports and to provide a site-wide interpretation of the geology and geochemistry of the Coastal Plain Hydrostratigraphic province. Ground water samples were analyzed for major cations and anions, minor and trace elements, gross alpha and beta, tritium, stable isotopes of hydrogen, oxygen, and carbon, and carbon-14. Sediments from the well borings were analyzed for mineralogy and major and minor elements.

  14. Internal investigations: a proactive approach to compliance.

    PubMed

    Schillaci, A; Radler, L

    2000-09-01

    Healthcare financial managers increasingly are recognizing that internal investigations can uncover and help correct improper activities before they attract government attention, as well as reveal valuable facts about any questionable activities that may be the target of a government inquiry. An organization that exhibits a high level of responsibility by undertaking a thorough internal investigation of possible improper activities may reduce or eliminate civil or criminal sanctions the government can impose if the organization is found guilty of improprieties. Furthermore, an internal investigation can preserve the organization's integrity and reaffirm its commitment to high ethical standards and sound business practices. PMID:11066390

  15. Investigations in Marine Chemistry: Tide Pool Ecology.

    ERIC Educational Resources Information Center

    Schlenker, Richard M.

    Students investigated the salinity of tide pools at different levels in the intertidal zone. Data are analyzed collectively. Students graphed and discussed data. Included are suggestions for evaluation and further study. (Author)

  16. Investigation of Trace Uranium in Biological Matrices

    E-print Network

    Miller, James Christopher

    2013-05-31

    A system for the analysis of urine bioassay samples for the purpose of inversely investigating an unknown exposure to uranium has been developed. This technique involves the use of a thin flow electrochemical cell in conjunction with an anodized...

  17. 22 CFR 305.3 - Background investigations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...305.3 Section 305.3 Foreign Relations PEACE CORPS ELIGIBILITY AND STANDARDS FOR PEACE CORPS VOLUNTEER SERVICE § 305.3 Background investigations. Section 22 of the Peace Corps Act states that to ensure...

  18. 22 CFR 305.3 - Background investigations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...305.3 Section 305.3 Foreign Relations PEACE CORPS ELIGIBILITY AND STANDARDS FOR PEACE CORPS VOLUNTEER SERVICE § 305.3 Background investigations. Section 22 of the Peace Corps Act states that to ensure...

  19. 22 CFR 305.3 - Background investigations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...305.3 Section 305.3 Foreign Relations PEACE CORPS ELIGIBILITY AND STANDARDS FOR PEACE CORPS VOLUNTEER SERVICE § 305.3 Background investigations. Section 22 of the Peace Corps Act states that to ensure...

  20. 22 CFR 305.3 - Background investigations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...305.3 Section 305.3 Foreign Relations PEACE CORPS ELIGIBILITY AND STANDARDS FOR PEACE CORPS VOLUNTEER SERVICE § 305.3 Background investigations. Section 22 of the Peace Corps Act states that to ensure...

  1. 22 CFR 305.3 - Background investigations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...305.3 Section 305.3 Foreign Relations PEACE CORPS ELIGIBILITY AND STANDARDS FOR PEACE CORPS VOLUNTEER SERVICE § 305.3 Background investigations. Section 22 of the Peace Corps Act states that to ensure...

  2. Executive Council P&T Investigative

    E-print Network

    Islam, M. Saif

    Executive Council P&T Investigative P&T Hearings Committee on Comm. Linda Bisson Davis DivisionHoc Committees (CAP/CAPAC) Academic Freedom Emeriti (9/1/10) Affirmative Action & Diversity CPB Subcommittee

  3. 45 CFR 689.6 - Investigations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION RESEARCH MISCONDUCT § 689.6 Investigations...Review of procedures or methods and inspection of laboratory materials, specimens, and records at awardee institutions;...

  4. 45 CFR 689.6 - Investigations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION RESEARCH MISCONDUCT § 689.6 Investigations...Review of procedures or methods and inspection of laboratory materials, specimens, and records at awardee institutions;...

  5. 45 CFR 689.6 - Investigations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION RESEARCH MISCONDUCT § 689.6 Investigations...Review of procedures or methods and inspection of laboratory materials, specimens, and records at awardee institutions;...

  6. Mechanisms of superconductivity investigated by nuclear radiation

    NASA Technical Reports Server (NTRS)

    Autler, S. H.; Coffey, H. T.; Keller, E. L.; Patterson, A.

    1967-01-01

    Investigation focused on the behavior of superconducting magnet and its constituent materials during and after exposure to nuclear radiation. The results will indicate the feasibility of their use in diverse applications and various environments.

  7. 21 CFR 812.46 - Monitoring investigations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...investigations. (a) Securing compliance. A sponsor who discovers...this part or other applicable FDA regulations, or any conditions...imposed by the reviewing IRB or FDA shall promptly either secure compliance, or discontinue...

  8. 21 CFR 812.46 - Monitoring investigations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...investigations. (a) Securing compliance. A sponsor who discovers...this part or other applicable FDA regulations, or any conditions...imposed by the reviewing IRB or FDA shall promptly either secure compliance, or discontinue...

  9. 21 CFR 812.46 - Monitoring investigations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...investigations. (a) Securing compliance. A sponsor who discovers...this part or other applicable FDA regulations, or any conditions...imposed by the reviewing IRB or FDA shall promptly either secure compliance, or discontinue...

  10. 21 CFR 812.46 - Monitoring investigations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...investigations. (a) Securing compliance. A sponsor who discovers...this part or other applicable FDA regulations, or any conditions...imposed by the reviewing IRB or FDA shall promptly either secure compliance, or discontinue...

  11. 21 CFR 812.46 - Monitoring investigations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...investigations. (a) Securing compliance. A sponsor who discovers...this part or other applicable FDA regulations, or any conditions...imposed by the reviewing IRB or FDA shall promptly either secure compliance, or discontinue...

  12. Seed Grant Recipients Year Investigator Institution Title

    E-print Network

    Arnold, Jonathan

    Seed Grant Recipients 1 Year Investigator Institution Title 1999 Balan, Aparna Vijayan University of West Georgia 1999 Shambare, Jonathan T. State University of West Georgia #12;Seed Grant Recipients 2

  13. Mathematical Investigations Using Logo. Part Two.

    ERIC Educational Resources Information Center

    Brown, Ken

    1986-01-01

    Programs (using Logo) developed by children to produce multiples, the Fibonacci series, and square numbers are presented, with graphical representations of functions introduced. Another investigation involves drawing a circle using turtle graphics. (MNS)

  14. A quantum mechanical investigation of silsesquioxane cages

    SciTech Connect

    Earley, C.W. [Univ. of Missouri, Kansas City, MO (United States)

    1994-09-01

    A quantum mechanical investigation of molecular silsesquioxane cages determined that molecules containing (Si-O-){sub 3} rings were more unstable than those with larger rings. 49 refs., 2 figs., 4 tabs.

  15. PILOT INVESTIGATION OF SECONDARY SLUDGE DEWATERING ALTERNATIVES

    EPA Science Inventory

    A pilot investigation of biological sludge thickening and dewatering alternatives, including pressure filtration, precoat vacuum filtration, filter belt pressing, capillary suction, dewatering, gravity filtration, centrifugation, and ultrafiltration has been conducted on waste ac...

  16. Raman Spectroscopic Investigation of Ferrous Sulfate Hydrates

    NASA Astrophysics Data System (ADS)

    Sharma, S. K.; Chio, C. H.; Muenow, D. W.

    2006-03-01

    Our objective is to unambiguously distinguish between the mono-, tetra-, and heptahydrates of FeSO4 that may be present on Martian surface. We have investigated these FeSO4 hydrates with micro-Raman spectroscopy.

  17. Investigation of Trace Uranium in Biological Matrices 

    E-print Network

    Miller, James Christopher

    2013-05-31

    A system for the analysis of urine bioassay samples for the purpose of inversely investigating an unknown exposure to uranium has been developed. This technique involves the use of a thin flow electrochemical cell in conjunction with an anodized...

  18. INVESTIGATION Multiple Pathways of Duplication Formation

    E-print Network

    Roth, John R.

    INVESTIGATION Multiple Pathways of Duplication Formation with and Without Recombination (Rec to "unequal recombination" between separated, directly repeated sequence elements (.100 bp), events that leave a recombinant element at the duplication junction. However, in the bacterial chromosome, duplications form

  19. Generating Quasigroups: A Group Theory Investigation

    ERIC Educational Resources Information Center

    Lynch, Mark A. M.

    2011-01-01

    A procedure for generating quasigroups from groups is described, and the properties of these derived quasigroups are investigated. Some practical examples of the procedure and related results are presented.

  20. 76 FR 45168 - Rules Relating to Investigations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-28

    ...Dodd-Frank Wall Street Reform and Consumer Protection Act, as amended...adjudicatory proceedings under Federal consumer financial law. The Rules authorize...with the Bureau's mission to protect consumers by investigating potential...

  1. 29 CFR 1985.104 - Investigation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...RETALIATION COMPLAINTS UNDER THE EMPLOYEE PROTECTION PROVISION OF THE CONSUMER FINANCIAL PROTECTION ACT OF 2010 Complaints, Investigations, Findings...necessary, in accordance with the Privacy Act of 1974, 5 U.S.C. 552a, and...

  2. Investigating packaging effects on bandgap references

    E-print Network

    Palakodety, Ravi (Ravi Kiran)

    2007-01-01

    This thesis investigates packaging effects on precision bandgap voltage references used in LTC switching regulators. Packaging stress causes a mean offset and room temperature distribution widening of the bandgap reference ...

  3. 45 CFR 689.6 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...689.6 Section 689.6 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION RESEARCH MISCONDUCT § 689.6 Investigations. (a) When an awardee institution or another Federal...

  4. 45 CFR 689.6 - Investigations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...689.6 Section 689.6 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION RESEARCH MISCONDUCT § 689.6 Investigations. (a) When an awardee institution or another Federal...

  5. Investigating with magnets: attraction and repelling

    NSDL National Science Digital Library

    This is a classroom activity where students create magnetic cats and see what occurs when the cats are placed next to each other. Students will be informally investigating magnetic attraction and repelling.

  6. 49 CFR 107.305 - Investigations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...investigator may gather information by reasonable means including, but not limited to, interviews, statements, photocopying, photography, and video- and audio-recording. (4) With concurrence of the Director, Field Operations, Pipeline and...

  7. 49 CFR 107.305 - Investigations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...investigator may gather information by reasonable means including, but not limited to, interviews, statements, photocopying, photography, and video- and audio-recording. (4) With concurrence of the Director, Field Operations, Pipeline and...

  8. 49 CFR 107.305 - Investigations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...investigator may gather information by reasonable means including, but not limited to, interviews, statements, photocopying, photography, and video- and audio-recording. (4) With concurrence of the Director, Field Operations, Pipeline and...

  9. ENGINEERING ASPECTS OF WATERBORNE OUTBREAK INVESTIGATION

    EPA Science Inventory

    The subject material in this manuscript covers the engineering aspects of waterborne outbreak investigation. Major areas included in this discussion are: evaluation of disinfection (concentration and contact time, pH and temperature, interference); evaluation of the water system ...

  10. 20 CFR 726.303 - Notification; investigation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...DEPARTMENT OF LABOR FEDERAL COAL MINE HEALTH AND SAFETY ACT OF 1969, AS AMENDED BLACK LUNG BENEFITS; REQUIREMENTS FOR COAL MINE OPERATOR'S INSURANCE Civil Money Penalties § 726.303 Notification; investigation. (a) If the...

  11. Exploring Magnetism: Investigating the forces of magnets

    NSDL National Science Digital Library

    This activity is a classroom and lab investigation of magnetism. Students gather results of experiments involving the forces of magnets. They use this data to develop their own experiments to test properties of magnets.

  12. 49 CFR 107.305 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...investigator may gather information by reasonable means including, but not limited to, interviews, statements, photocopying, photography, and video- and audio-recording. (4) With concurrence of the Director, Office of Hazardous Materials...

  13. 49 CFR 107.305 - Investigations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...investigator may gather information by reasonable means including, but not limited to, interviews, statements, photocopying, photography, and video- and audio-recording. (4) With concurrence of the Director, Field Operations, Pipeline and...

  14. 31 CFR 16.4 - Investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    31 Money and Finance: Treasury 1 2010-07-01...Investigation. 16.4 Section 16.4 Money and Finance: Treasury Office of the Secretary...authority under which the subpoena is issued and shall identify the information,...

  15. Northwestern Investigator's Guide to Starting a Company

    E-print Network

    ? ......................................................................... 6 For-profit or non-profit1 Northwestern Investigator's Guide to Starting a Company acknowledgment to the University of Georgia for permission to use material from "Start

  16. 32 CFR 637.6 - Customs investigations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...ammunition, unauthorized or illegal weapons or property, which may be property...Government, notification must be made via electronic message or facsimile to HQDA, Office...investigative agency. (d) Recovery of weapons and significant amounts of...

  17. 32 CFR 637.6 - Customs investigations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...ammunition, unauthorized or illegal weapons or property, which may be property...Government, notification must be made via electronic message or facsimile to HQDA, Office...investigative agency. (d) Recovery of weapons and significant amounts of...

  18. 32 CFR 637.6 - Customs investigations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...ammunition, unauthorized or illegal weapons or property, which may be property...Government, notification must be made via electronic message or facsimile to HQDA, Office...investigative agency. (d) Recovery of weapons and significant amounts of...

  19. 32 CFR 637.6 - Customs investigations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...ammunition, unauthorized or illegal weapons or property, which may be property...Government, notification must be made via electronic message or facsimile to HQDA, Office...investigative agency. (d) Recovery of weapons and significant amounts of...

  20. CIS08052: Computer Forensic Investigation Game

    Microsoft Academic Search

    Marius Costea; Jill Slay; Ben Turnbull

    Take one part computer forensics analysis software, add one hard drive image disc, a dash of police work, and mix in with an interactive gaming experience and you have Max's Computer Forensics Investigations Game .

  1. 21 CFR 1230.33 - Investigations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... REGULATIONS UNDER CERTAIN OTHER ACTS ADMINISTERED BY THE FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations. Authorized agents in the employ of the Department of...

  2. 21 CFR 1230.33 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... REGULATIONS UNDER CERTAIN OTHER ACTS ADMINISTERED BY THE FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations. Authorized agents in the employ of the Department of...

  3. 21 CFR 1230.33 - Investigations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... REGULATIONS UNDER CERTAIN OTHER ACTS ADMINISTERED BY THE FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations. Authorized agents in the employ of the Department of...

  4. 21 CFR 1230.33 - Investigations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... REGULATIONS UNDER CERTAIN OTHER ACTS ADMINISTERED BY THE FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations. Authorized agents in the employ of the Department of...

  5. 21 CFR 1230.33 - Investigations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... REGULATIONS UNDER CERTAIN OTHER ACTS ADMINISTERED BY THE FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations. Authorized agents in the employ of the Department of...

  6. Cyber Forensics Ontology for Cyber Criminal Investigation

    Microsoft Academic Search

    Heum Park; Sunho Cho; Hyuk-Chul Kwon

    2009-01-01

    We developed Cyber Forensics Ontology for the criminal investigation in cyber space. Cyber crime is classified into cyber\\u000a terror and general cyber crime, and those two classes are connected with each other. The investigation of cyber terror requires\\u000a high technology, system environment and experts, and general cyber crime is connected with general crime by evidence from\\u000a digital data and cyber

  7. A rheological investigation of vesicular rhyolite

    Microsoft Academic Search

    N. Bagdassarov; D. B. Dingwell

    1992-01-01

    Bagdassarov, N.Sh. and Dingwell, D.B., 1992. A rheological investigation of vesicular rhyolite. J. Volcanol. Geotherm. Res., 50: 307-322. The rheology of vesiculating rhyolitic systems exerts a strong control on the transport of silicic magmas in the subvol- canic to volcanic environments. We present here an investigation of vesiculating and vesiculated rhyolites using dilato- metric methods. This study examines the effect

  8. Investigation of laser polarized xenon magnetic resonance

    NASA Technical Reports Server (NTRS)

    Walsworth, Ronald L.

    1998-01-01

    Ground-based investigations of a new biomedical diagnostic technology: nuclear magnetic resonance of laser polarized noble gas are addressed. The specific research tasks discussed are: (1) Development of a large-scale noble gas polarization system; (2) biomedical investigations using laser polarized noble gas in conventional (high magnetic field) NMR systems; and (3) the development and application of a low magnetic field system for laser polarized noble gas NMR.

  9. A Investigation of Surface Generated Flow Noise

    Microsoft Academic Search

    Sheng-Chung Liu

    1984-01-01

    The aerodynamic sound generated by a small scale wing model interacting with a 4-inch jet has been investigated experimentally in NASA-AMES Anechoic Chamber. The investigation consisted of two parts. The first part was concentrated on the shear layer\\/wing interaction noise. The second part was the study of noise associated with separated flow. Cross -correlation techniques were used to discriminate against

  10. NACA Model Investigations of Seaplanes in Waves

    NASA Technical Reports Server (NTRS)

    Parkinson, John B

    1955-01-01

    The models, apparatus, and instrumentation developed for investigations of the rough-water characteristics of seaplanes in the Langley tanks are described briefly. The results of several investigations to improve these characteristics are combined and summarized. The large effect of waves in take-off resistance is illustrated. The general relationship of the measured quantities of importance to wave length and height are also illustrated.

  11. The SIR-B science investigations plan

    NASA Technical Reports Server (NTRS)

    1984-01-01

    Shuttle Imaging Radar-B (SIR-B) is the second synthetic aperture radar (SAR) to be flown on the National Aeronautics and Space Administration's Space Transportation System (Shuttle). It is the first spaceborne SAR to feature an antenna that allows acquisition of multiincidence angle imagery. An international team of scientists will use SIR-B to conduct investigations in a wide range of disciplines. The radar, the mission, and the investigations are described.

  12. Investigating Computer Attacks Using Attack Trees

    Microsoft Academic Search

    Nayot Poolsapassit; Indrajit Ray

    2007-01-01

    System log files contain valuable evidence pertaining to computer attacks. However, the log files are often massive, and much\\u000a of the information they contain is not relevant to the investigation. Furthermore, the files almost always have a flat structure,\\u000a which limits the ability to query them. Thus, digital forensic investigators find it extremely difficult and time consuming\\u000a to extract and

  13. An investigation of the Sutcliffe development theory

    E-print Network

    Dushan, Joseph Daniel

    1971-01-01

    AN INVESTIGATION OF THE SUTCLIFFE DEVELOPMENT THEORY A Thesis by JOSEPH DANIEL DUSHAN Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1971... Major Subject: Meteorology AN INVESTIGATION OF THE SUTCLIFFE DEVELOPMENT THEORY A Thesis by JOSEPH DANIEL DUSHAN Approved as to sty1e and content by: (Chairman of C ttee) (Head of Depa t) (Member) (Member December 1971 ABSTRACT...

  14. Investigation of paramagnetic response of metallic epoxies

    NASA Technical Reports Server (NTRS)

    Ash, R. L.; Chegini, H.

    1986-01-01

    The paramagnetic properties of epoxies which were impregnated with metal ions were examined as the primary task in this research. A major conclusion was that the quality control of the epoxies was insufficient to permit reliable evaluation. Subsequently, a new set of specimens is being prepared. As an additional task, a new method is investigated for estimating heats of combustion for saturated hydrocarbons. The results of that investigation have shown that the empirical approach is a promising method for on-line measurements.

  15. Racial disparities among clinical research investigators.

    PubMed

    Getz, Kenneth; Faden, Laura

    2008-01-01

    Evidence shows that minority patients are underrepresented in clinical trials. The development of new drugs and treatments, however, requires that clinical research studies include representative participants, particularly in light of evidence indicating that minority populations sometimes respond differently to prescription medications. Racial disparities among clinical investigators are often cited as a major reason why minority patients are underrepresented in clinical trials. However, there is little to no empirical data to support or refute the prevalence of disparities among clinical investigators. The Tufts Center conducted two online surveys of 1376 physicians. The first survey (N = 859 respondents; 31% response rate) assessed the overall incidence of minority physician involvement in clinical research. The second survey (N = 768 respondents; 20% response rate) assessed the demographics, experience, and infrastructure of minority physicians who have participated in clinical research as a principal investigator or subinvestigator. The results of this study indicate that significant racial disparities exist among clinical investigators. The results also support assertions that physician race influences race of the clinical trial volunteer. The incidence of participation in clinical research among minority physicians is well below that observed among white physicians, more so with regard to U.S. Food & Drug Administration-regulated clinical trials funded by industry. Minority investigators tend to conduct and initiate fewer clinical trials annually. Yet minority and white physician interest in participating in clinical research is similarly high. Minority investigators tend be younger, with more limited clinical research infrastructure and support than their white counterparts. New strategies, policies, incentives, and reforms are needed to address racial disparities among clinical investigators. In addition, disparities among both volunteers and investigators need to be tracked more closely and methodically to monitor and assess the impact of newly implemented programs and reforms. PMID:18223347

  16. Investigation of drug interactions with pinaverium bromide.

    PubMed

    Devred, C; Godeau, P; Guerot, C; Librez, P; Mougeot, G; Orsetti, A; Segrestaa, J M

    1986-01-01

    A series of studies was carried out at 6 centres to investigate possible drug interaction between the spasmolytic, pinaverium bromide, and cardiac glycosides, anticoagulants and hypoglycaemic agents given to patients as part of the long-term treatment of their condition. The results of clinical and laboratory investigations did not show any evidence of pinaverium bromide interfering with the action or activity of any of the drugs studied. PMID:3084176

  17. The financial impact of investigational drug services.

    PubMed

    Rogers, S D; Lampasona, V; Buchanan, E C

    1994-04-01

    The pharmacy-based investigational drug service plays an important role in the clinical research process. Investigators and sponsors often rely on the research pharmacist to assure drug accountability and to assist in educating staff about drug studies, reporting adverse reactions, and providing drug information. While many pharmacy departments across the country have established investigational drug services, there is an increasing need to justify these services from a financial perspective. Our pharmacy department currently provides investigational drug services for over 100 protocols. We have established a fee-for-service billing mechanism, but only 61% of our protocols are drug-company or investigator-sponsored, which reimburse for pharmacy services. As a result, we are unable to collect all operating costs through our billing mechanism. Many protocols, however, are sponsored by the National Cancer Institute (NCI), which provides free drugs for cancer protocols. Some NCI drugs are also on the market, so the hospital experiences savings in drug costs when patients are placed on certain NCI protocols. When we combine direct costs recovered through billing with the indirect cost savings from dispensing "free drugs, we find that the total benefit of operating an investigational drug service more than outweighs the cost of operating the service. PMID:10133561

  18. Science Investigation That Best Supports Student Learning: Teachers' Understanding of Science Investigation

    ERIC Educational Resources Information Center

    Moeed, Azra

    2013-01-01

    Internationally, learning science through investigation is promoted as a preferred pedagogical approach. Research presented takes a view that such learning depends on how teachers understand science investigation. Teachers' understanding of science investigation was an aspect of an interpretive case study of the phenomenon of science…

  19. The stages of cybercrime investigations: Bridging the gap between technology examination and law enforcement investigation

    Microsoft Academic Search

    Paul Hunton

    2011-01-01

    Cybercrime investigation can be argued as still in its infancy. The technical investigation practices and procedures of global law enforcement are also still evolving in response to the growing threat of the cybercriminal. This has led to considerable debate surrounding the adequacy of current technical investigation models, examination tools and the subsequent capability of law enforcement to tackle cybercrime. To

  20. The context and habits of accident investigation practices: A study of 108 Swedish investigators

    Microsoft Academic Search

    Carl Rollenhagen; Joakim Westerlund; Jonas Lundberg; Erik Hollnagel

    2010-01-01

    The context and habits of accident investigation practices were explored by means of questionnaire data obtained from accident investigators in the healthcare, transportation, nuclear and rescue sectors in Sweden. Issues explored included; resources, training, time spent in different phases of an investigation, methods and procedures, beliefs about causes to accidents, communication issues, etc. Examples of findings were: differences in the

  1. Scientific Investigations of Elementary School Children

    NASA Astrophysics Data System (ADS)

    Valanides, Nicos; Papageorgiou, Maria; Angeli, Charoula

    2013-04-01

    The study provides evidence concerning elementary school children's ability to conduct a scientific investigation. Two hundred and fifty sixth-grade students and 248 fourth-grade students were administered a test, and based on their performance, they were classified into high-ability and low-ability students. The sample of this study was randomly selected and included 80 students, 40 fourth-grade and 40 sixth-grade students of low and high abilities. Students were specifically instructed to investigate the functioning of a device, to think aloud prior and after any experiment with the device, and to keep a record of their experimental results. The results showed that students were inclined to mainly collect evidence from the experimental space and failed to control variables during their investigation. The majority of the students had difficulties with effectively organizing collected data and failed to coordinate hypotheses with evidence. The significant interaction effect that was found between grade level and ability in terms of students' investigation ability indicates that the existing gap between high- and low-ability students becomes bigger as students become older. Undoubtedly, ongoing research efforts for identifying patterns of children's cognitive development will be most valuable as they can have important implications for the design of teaching scenarios and inquiry-based science activities conducive to accelerating students' cognitive growth and scientific investigation abilities.

  2. Cyber Forensics Ontology for Cyber Criminal Investigation

    NASA Astrophysics Data System (ADS)

    Park, Heum; Cho, Sunho; Kwon, Hyuk-Chul

    We developed Cyber Forensics Ontology for the criminal investigation in cyber space. Cyber crime is classified into cyber terror and general cyber crime, and those two classes are connected with each other. The investigation of cyber terror requires high technology, system environment and experts, and general cyber crime is connected with general crime by evidence from digital data and cyber space. Accordingly, it is difficult to determine relational crime types and collect evidence. Therefore, we considered the classifications of cyber crime, the collection of evidence in cyber space and the application of laws to cyber crime. In order to efficiently investigate cyber crime, it is necessary to integrate those concepts for each cyber crime-case. Thus, we constructed a cyber forensics domain ontology for criminal investigation in cyber space, according to the categories of cyber crime, laws, evidence and information of criminals. This ontology can be used in the process of investigating of cyber crime-cases, and for data mining of cyber crime; classification, clustering, association and detection of crime types, crime cases, evidences and criminals.

  3. Columbia Accident Investigation Board Report. Volume 3

    NASA Technical Reports Server (NTRS)

    White, Donald J. (Editor); Goodman, Patrick A. (Editor); Reingold, Lester A. (Editor); Kirchhoff, Christopher M. (Editor); Simon, Ariel H. (Editor)

    2003-01-01

    This report describes the results of an investigative analysis performed by the Air Force Research Laboratory Sensors Directorate at th the specific request of the Defense Columbia Investigation Support Team (DCIST) who was supporting the Columbia Accident Investigation Board (CAIB). The work was performed during the period February 20, 2003 through 20 July 2003. An interim release of measurement findings was provided the CAIB on 24 April 2003, and the information was released in public testimony to the CAIB on May 6, 2003 at the Hilton Hotel, Houston, Texas. The overall assessment and conclusions of this report are consistent with the CAIB 6 May 2003 testimony, with one notable exception discussed in Section VI. This report has been reviewed by the AFRL/SN Flight Day Two DCIST appointed assessment team, and is hereby released to the CAIB and DCIST for final disposition.

  4. Procedures for ground-water investigations

    SciTech Connect

    Not Available

    1989-09-01

    This manual was developed by the Pacific Northwest Laboratory (PNL) to document the procedures used to carry out and control the technical aspects of ground-water investigations at the PNL. Ground-water investigations are carried out to fulfill the requirements for the US Department of Energy (DOE) to meet the requirements of DOE Orders. Investigations are also performed for various clients to meet the requirements of the Resource Conservation and Recovery Act of 1976 (RCRA) and the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA). National standards including procedures published by the American Society for Testing and Materials (ASTM) and the US Geological Survey were utilized in developing the procedures contained in this manual.

  5. Applying Machine Trust Models to Forensic Investigations

    NASA Astrophysics Data System (ADS)

    Wojcik, Marika; Venter, Hein; Eloff, Jan; Olivier, Martin

    Digital forensics involves the identification, preservation, analysis and presentation of electronic evidence for use in legal proceedings. In the presence of contradictory evidence, forensic investigators need a means to determine which evidence can be trusted. This is particularly true in a trust model environment where computerised agents may make trust-based decisions that influence interactions within the system. This paper focuses on the analysis of evidence in trust-based environments and the determination of the degree to which evidence can be trusted. The trust model proposed in this work may be implemented in a tool for conducting trust-based forensic investigations. The model takes into account the trust environment and parameters that influence interactions in a computer network being investigated. Also, it allows for crimes to be reenacted to create more substantial evidentiary proof.

  6. Investigation of Single Stage Axial Fans

    NASA Technical Reports Server (NTRS)

    Ruden, P.

    1944-01-01

    The following investigations are connected with experiments on fans carried out by the author in the Gouttingen Aerodynamic Laboratory within the framework of the preliminary experiments for the new Gouttingen wind-tunnel project. A fan rotor was developed which had very high efficiency at the design point corresponding to moderate pressure and which, in addition, could operate at a proportionally high pressure, rise. To establish the determining operating factors the author carried out extensive theoretical investigation in Hannover. In this it was necessary, to depart from the usual assumption of vanishing radial velocities. The calculations were substantially lightened by the introduction of diagrams. The, first part of the.report describes the theoretical investigations; the second, the experiments carried out at Gouttingen.

  7. Investigation of organic adhesives for hybrid microcircuits

    NASA Technical Reports Server (NTRS)

    Perkins, K. L.; Licari, J. J.

    1975-01-01

    The properties of organic adhesives were investigated to acquire information for a guideline document regarding the selection of adhesives for use in high reliability hybrid microcircuits. Specifically, investigations were made of (1) alternate methods for determining the outgassing of cured adhesives, (2) effects of long term aging at 150 C on the electrical properties of conductive adhesives, (3) effects of shelf life age on adhesive characteristics, (4) bond strengths of electrically conductive adhesives on thick film gold metallization, (5) a copper filled adhesive, (6) effects of products outgassed from cured adhesives on device electrical parameters, (7) metal migration from electrically conductive adhesives, and (8) ionic content of electrically insulative adhesives. The tests performed during these investigations are described, and the results obtained are discussed.

  8. Laboratory Investigations of the Extreme Universe

    SciTech Connect

    Chen, Pisin

    2003-08-06

    Recent years have seen tremendous progress in our understanding of the extreme universe, which in turn points to even deeper questions to be further addressed. History has shown that the symbiosis between direct observations and laboratory investigation is instrumental in the progress of astrophysics. Current frontier astrophysical phenomena related to particle astrophysics and cosmology typically involve one or more of the following conditions: (1) extremely high energy events; (2) very high density, high temperature processes; (3) super strong field environments. Laboratory experiments using high intensity lasers and particle beams can calibrate astrophysical observation or detection processes, investigate the underlying dynamics of astrophysical phenomena, and probe into fundamental physics in extreme limits. We give examples of possible laboratory experiments that investigate into the extreme universe.

  9. Wildlife health investigations: needs, challenges and recommendations

    PubMed Central

    2013-01-01

    In a fast changing world with growing concerns about biodiversity loss and an increasing number of animal and human diseases emerging from wildlife, the need for effective wildlife health investigations including both surveillance and research is now widely recognized. However, procedures applicable to and knowledge acquired from studies related to domestic animal and human health can be on partly extrapolated to wildlife. This article identifies requirements and challenges inherent in wildlife health investigations, reviews important definitions and novel health investigation methods, and proposes tools and strategies for effective wildlife health surveillance programs. Impediments to wildlife health investigations are largely related to zoological, behavioral and ecological characteristics of wildlife populations and to limited access to investigation materials. These concerns should not be viewed as insurmountable but it is imperative that they are considered in study design, data analysis and result interpretation. It is particularly crucial to remember that health surveillance does not begin in the laboratory but in the fields. In this context, participatory approaches and mutual respect are essential. Furthermore, interdisciplinarity and open minds are necessary because a wide range of tools and knowledge from different fields need to be integrated in wildlife health surveillance and research. The identification of factors contributing to disease emergence requires the comparison of health and ecological data over time and among geographical regions. Finally, there is a need for the development and validation of diagnostic tests for wildlife species and for data on free-ranging population densities. Training of health professionals in wildlife diseases should also be improved. Overall, the article particularly emphasizes five needs of wildlife health investigations: communication and collaboration; use of synergies and triangulation approaches; investments for the long term; systematic collection of metadata; and harmonization of definitions and methods. PMID:24188616

  10. Parasexuality in genitourinary investigations: a qualitative study

    PubMed Central

    2014-01-01

    Background Genitourinary investigations are performed on a large proportion of middle-aged and older men and the majority undergo investigations for prostate issues. The effects that genitourinary disease can have on men depend on the type of problem, investigations required and treatment including impotence, gynaecomastia and urinary incontinence that have lasting devastating physical, social and psychological effects. The aim was to explore older men’s experience and views of intimate and intrusive genitourinary investigations and specifically to develop hypotheses and theories concerning gender and sexuality issues in intimate genitourinary investigations. Methods Written informed consent was obtained for this qualitative study. Data were collected through one-off, semi-structured interviews involving 15 men in the first year following patient’s last urological procedure. Initially, multiple themes were identified and when analysed further concepts were repeatedly present. As the urological investigations were limited to men, gender and sexuality became prominent issues in the data. Results On analysis, the term parasexuality appeared to explain the dynamic of the situation. Parasexuality is a modified form of sexuality which is channelled and limited to maintain propriety. This was not expressed as sexuality in its overt, explicit sense, but instead a type of covert sexuality where professional boundaries are maintained but nonetheless undercurrents remain. This managed version of sexuality created a common currency by which interactions between staff and patients could take place safely. Feeding into parasexuality were gender role stereotypes and for some of the participants this reflected their own experience, context, historical and cultural norms. Intimate contact in the form of exposure and handling of the participants' genitalia during the investigations particularly challenged the boundaries of parasexuality. In order to remain parasexual, many of the participants suppressed their sexuality. Viewing staff as professional was an additional strategy used by participants to limit any sexuality as parasexuality. Conclusion This study has contributed towards the appeal for more studies to examine privacy perceptions of patients in genitalia-related care, however, it is by no means definitive. Parasexuality goes some way to explain the dynamics of communication between older men and health care professionals during genitourinary investigations. PMID:24606673

  11. Pore Formation and Mobility Investigation video images

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Video images sent to the ground allow scientists to watch the behavior of the bubbles as they control the melting and freezing of the material during the Pore Formation and Mobility Investigation (PFMI) in the Microgravity Science Glovebox aboard the International Space Station. While the investigation studies the way that metals behave at the microscopic scale on Earth -- and how voids form -- the experiment uses a transparent material called succinonitrile that behaves like a metal to study this problem. The bubbles do not float to the top of the material in microgravity, so they can study their interactions.

  12. The Living With a Star Geospace Investigations

    NASA Technical Reports Server (NTRS)

    Spann, Jim; Kintner, Paul; Six, N. Frank (Technical Monitor)

    2002-01-01

    The Living With a Star Geospace Investigations is established to effectively address those phenomena the Geospace environment that directly affect life and society. The priority science questions focus on two broad areas: (1) ionospheric variability, especially at mid-latitudes, that affects navigation and communications and (2) the source, acceleration mechanisms, and sinks of the radiation belts that degrade satellite lifetimes, produce surface charging, and threaten manned space flight. Candidate missions to address these science foci will be presented as well as possible additional investigations and experiments that would enable an understanding of the Geospace at the system level.

  13. Scientific Investigations of Elementary School Children

    ERIC Educational Resources Information Center

    Valanides, Nicos; Papageorgiou, Maria; Angeli, Charoula

    2014-01-01

    The study provides evidence concerning elementary school children's ability to conduct a scientific investigation. Two hundred and fifty sixth-grade students and 248 fourth-grade students were administered a test, and based on their performance, they were classified into high-ability and low-ability students. The sample of this study was…

  14. Investigative Research: How It Changes Learner Status.

    ERIC Educational Resources Information Center

    Kenny, Brian

    1993-01-01

    What matters about an educational activity is how learners respond to it. This article examines a program concerned with the learners' needs, through the expression of learners' own meanings, and advances the concept of investigative research as a suitable vehicle for more autonomous learning, through a change in learner status. (26 references)…

  15. Principal Investigator: SECTION B. REQUIRED SUBCONTRACT ATTACHMENTS

    E-print Network

    Acton, Scott

    Principal Investigator: Sponsor: SECTION B. REQUIRED SUBCONTRACT ATTACHMENTS Distinct statement involves human subjects. If Yes, attach their current IRB approval Subcontractor's work involves animals. If Yes, attach their current IACUC approval. If at a foreign site, follow UVA ACUC guidance (434

  16. Report of investigation from Japanese MAGSAT Team

    NASA Technical Reports Server (NTRS)

    Fukushima, N.; Maeda, H.; Yukutake, T.; Tanaka, M.; Oshima, S.; Ogawa, K.; Kawamura, M.; Miyazaki, Y.; Uyeda, S.; Kobayashi, K. (principal investigators)

    1982-01-01

    Progress in the data processing and data acquisition of computer compatible MAGSAT tapes is reported. Investigations focused on the crustal structure near Japan and its Antarctic station, and electric currents and hydrodynamic waves in the ionosphere and the magnetosphere. The magnetization of the crust in the northwestern Pacific region is discussed.

  17. Mars Reconnaissance Orbiter Radio Science Gravity Investigation

    E-print Network

    Zuber, Maria

    data from the Mars Global Surveyor and Mars Odyssey spacecraft, also currently orbiting Mars] and Mars Odyssey (ODY) [Saunders et al., 2004] missions. The combined analysis will maximize the geoMars Reconnaissance Orbiter Radio Science Gravity Investigation Maria T. Zuber,1 Frank G. Lemoine,2

  18. Cognitive Hypnotherapy for Depression: An Empirical Investigation

    Microsoft Academic Search

    Assen Alladin; Alisha Alibhai

    2007-01-01

    To investigate the effectiveness of cognitive hypnotherapy (CH), hypnosis combined with cognitive-behavioral therapy (CBT), on depression, 84 depressives were randomly assigned to 16 weeks of treatment of either CH or CBT alone. At the end of treatment, patients from both groups significantly improved compared to baseline scores. However, the CH group produced significantly larger changes in Beck Depression Inventory, Beck

  19. An Investigation of the Therac-25 Accidents

    Microsoft Academic Search

    Nancy Leveson; Clark S. Turner

    1992-01-01

    With information for this article taken from publicly available documents, we present a detailed accident investigation of the factors involved in the overdoses and the attempts by the users, manufacturers, and the US and Canadian governments to deal with them. Our goal is to help others learn from this experience, not to criticize the equipment's manufacturer or anyone else. The

  20. Investigating the Effectiveness of Classroom Diagnostic Tools

    ERIC Educational Resources Information Center

    Schultz, Robert K.

    2012-01-01

    The primary purposes of the study are to investigate what teachers experience while using the Classroom Diagnostic Tools (CDT) and to relate those experiences to the rate of growth in students' mathematics achievement. The CDT contains three components: an online computer adaptive diagnostic test, interactive web-based student reports, and…

  1. Investigating how terrain and watersheds are connected

    NSDL National Science Digital Library

    Mick Hamilton

    In this activity students will gain an understanding of how terrain affects a watershed. Students will use maps and Google Earth to "get a picture" of the terrain within their watershed. They will use this knowledge to create an investigation of their stream which will help answer student generated questions about the connection of terrain and water systems.

  2. Simulation investigation of wind turbine imbalance faults

    Microsoft Academic Search

    Xiang Gong; Wei Qiao

    2010-01-01

    This paper investigates the use of simulations to study wind turbine imbalance faults. The dynamics of a model wind turbine generator (WTG) are simulated in a combined environment of TurbSim, FAST (Fatigue, Aerodynamics, Structures, Turbulence), and Simulink in three different scenarios, i.e., normal operating conditions, blade imbalance, and aerodynamic asymmetry. The blade imbalance is simulated by scaling the mass density

  3. Investigating Ideological Clarity in Teacher Education

    ERIC Educational Resources Information Center

    Assaf, Lori Czop; McMunn Dooley, Caitlin

    2010-01-01

    Set in a graduate-level multicultural literacy course, this qualitative study draws on Bakhtin's theories of ideological becoming and a hybrid of critical discourse analysis (CDA) methods (Gee, 1996; Fairclough, 1995; 2003) to explore the complexities of learning to teach culturally and linguistically diverse students. We investigated how eight…

  4. Investigating First Year Education Students' Stress Level

    ERIC Educational Resources Information Center

    Geng, Gretchen; Midford, Richard

    2015-01-01

    This paper investigated the stress levels of first-year education students who undertake teaching practicum and theory units during their first year of teacher education program. First, 139 first-year and 143 other years' education students completed the PSS-10 scale, which measures perceived level of stress. Then, 147 first-year education…

  5. A guide to cyber-crime investigations

    Microsoft Academic Search

    1998-01-01

    As the Internet and other components of cyber-space continue to proliferate in the workplace, as modern businesses would do well to address the threat of cyber-crime. The ability to conduct a successful cybercrime investigations will, increasingly, become a necessity. Management can ill-afford to neglect the threat.

  6. Investigating the Boron Requirement of Plants.

    ERIC Educational Resources Information Center

    Bohnsack, Charles W.

    1991-01-01

    This article describes a simple and rapid method for using summer squash to investigate born deficiency in plants. Author asserts that students are likely to feel challenged by laboratory exercises and projects that focus on the role boron plays in plant growth because it is an unresolved problem in biology. (PR)

  7. Buried Alive! An Investigation of Plant Dormancy

    Microsoft Academic Search

    Ashley J Allen; Mark Balschweid; Paul Hammond; Brian Henderson; Peggy A Johnson; Abigayle Kite; Stephanie Martin

    2004-01-01

    In this investigation, pairs of upper elementary students test germination percentage using seeds of Indian corn (Zea mays), scarlet runner beans (Phaseolus coccineus), and the prairie cup-plant (Silphium perfoliatum) grown on rolled, damp paper towels. The pairs compare seeds that have been stratified, a simulation of overwintering and spring thaw, to seeds of the same type that have not. Then,

  8. INVESTIGATION Chromosomal Evolution and Patterns of

    E-print Network

    Burke, John M.

    INVESTIGATION Chromosomal Evolution and Patterns of Introgression in Helianthus Jessica G. Barb,*,1 constructed high-density genetic maps of the silverleaf sunflower (Helianthus argophyllus) and Algodones Dune. annuus) to identify chromosomal rearrangements between species. The genetic maps of H. argophyllus and H

  9. Seismic investigation of electrical raceway components

    Microsoft Academic Search

    F. Elsabee; L. Serdar; D. Williams

    1984-01-01

    The structural integrity of flexible electrical raceway systems in nuclear facilities subjected to seismic loads was investigated in an extensive analytical and testing program. In addition to shakingtable tests of full-scale raceway systems and development of analytical models for correlation with the test results (and ultimate use in the seismic evaluation of raceway systems), the program included cyclic testing and

  10. Occupational Clusters. Occupational Investigation Guide. First Edition.

    ERIC Educational Resources Information Center

    East Texas State Univ., Commerce. Occupational Curriculum Lab.

    This occupational investigation guide contains learning activities for instruction in fifteen occupational clusters: (1) agribusiness and natural resources, (2) business and office, (3) communications and media, (4) construction, (5) consumer and homemaking, (6) environment, (7) fine arts and humanities, (8) health, (9) hospitality and recreation,…

  11. May 28, 2013 Dear Pediatric Investigators,

    E-print Network

    Puglisi, Joseph

    May 28, 2013 Dear Pediatric Investigators, RE: Pediatric Clinical Research Trials The Food and Drug significant clarification provided by the FDA pertained to pediatric studies with more than one arm to which of a multiple arm pediatric trial. The most obvious and most common situation we expect to see

  12. ORIGINAL INVESTIGATION Consequences of Comorbid Insomnia Symptoms

    E-print Network

    Pennsylvania, University of

    for Sleep and Respiratory Neurobiology and Division of Sleep Medicine (Drs Gooneratne, Gehrman, NkwuoORIGINAL INVESTIGATION Consequences of Comorbid Insomnia Symptoms and Sleep-Related BreathingD Background: The prevalence of sleep-related breath- ing disorder (SRBD) and insomnia symptoms increases

  13. Comparative investigation of various cellulase assay procedures

    Microsoft Academic Search

    Giorgio Canevascini; Catherine Gattlen

    1981-01-01

    The cellulolytic activity of crude enzyme preparations from different cellulolytic fungi (namely Trichoderma viride, Trichoderma koningii, Fusarium solani, Sporotrichum pulverulentum, Sporotrichum thermophile) was assayed comparatively with several common analytical procedures described in the literature. The investigation was carried out with the objective of evaluating, with raw culture filtrates, the different cellulase tests in relation to their specificity for endo- and

  14. Students' Investigation of a View Tube

    ERIC Educational Resources Information Center

    Obara, Samuel

    2010-01-01

    The inquiry-based approach to learning has gained popularity in recent times. Those who promote this approach maintain that mathematical investigation should be used to engage students. The National Council of Teachers of Mathematics (NCTM) recommends that problem solving be the center of mathematics teaching in promoting student learning through…

  15. MATERIAL TRANSFER FORM A. Principal Investigator

    E-print Network

    Ollivier-Gooch, Carl

    MATERIAL TRANSFER FORM A. Principal Investigator Name: Academic Rank: Tel: Department / Unit:Fax: Faculty:Email: B. Other Party Sending or Receiving the Material Organization: Address: Contact Name: Tel: Fax: Email: C. Material and Research Project #103-6190 Agronomy Road, Vancouver, BC V6T 1Z3 Address

  16. Investigating Ceiling Effects in Longitudinal Data Analysis

    ERIC Educational Resources Information Center

    Wang, Lijuan; Zhang, Zhiyong; McArdle, John J.; Salthouse, Timothy A.

    2008-01-01

    Score limitation at the top of a scale is commonly termed "ceiling effect." Ceiling effects can lead to serious artifactual parameter estimates in most data analysis. This study examines the consequences of ceiling effects in longitudinal data analysis and investigates several methods of dealing with ceiling effects through Monte Carlo simulations…

  17. Seismic and electromagnetic tunnel detection investigation

    Microsoft Academic Search

    H. F. Knauf

    1975-01-01

    This report describes the major areas of tunnel detection investigations conducted by USAMERDC during the period December 1966 through December 1969. A short discussion of the tunnel problem is presented, and two technical approaches, seismic and electromagnetic, are discussed. Both seismic and electromagnetic detector systems were developed and evaluation tests were conducted to determine capabilities and limitations of the devices.

  18. RSRM Nozzle Anomalous Throat Erosion Investigation Overview

    NASA Technical Reports Server (NTRS)

    Clinton, R. G., Jr.; Wendel, Gary M.

    1998-01-01

    In September, 1996, anomalous pocketing erosion was observed in the aft end of the throat ring of the nozzle of one of the reusable solid rocket motors (RSRM 56B) used on NASA's space transportation system (STS) mission 79. The RSRM throat ring is constructed of bias tape-wrapped carbon cloth/ phenolic (CCP) ablative material. A comprehensive investigation revealed necessary and sufficient conditions for occurrence of the pocketing event and provided rationale that the solid rocket motors for the subsequent mission, STS-80, were safe to fly. The nozzles of both of these motors also exhibited anomalous erosion similar to, but less extensive than that observed on STS-79. Subsequent to this flight, the investigation to identify both the specific causes and the corrective actions for elimination of the necessary and sufficient conditions for the pocketing erosion was intensified. A detailed fault tree approach was utilized to examine potential material and process contributors to the anomalous performance. The investigation involved extensive constituent and component material property testing, pedigree assessments, supplier audits, process audits, full scale processing test article fabrication and evaluation, thermal and thermostructural analyses, nondestructive evaluation, and material performance tests conducted using hot fire simulation in laboratory test beds and subscale and full scale solid rocket motor static test firings. This presentation will provide an over-view of the observed anomalous nozzle erosion and the comprehensive, fault-tree based investigation conducted to resolve this issue.

  19. The Patroon Creek Contamination Migration Investigation

    Microsoft Academic Search

    K. Dufek; A. Zafran; J. T. Moore

    2006-01-01

    Shaw performed a Site Investigation (SI) for sediment within the Unnamed Tributary of the Patroon Creek, a section of the Patroon Creek, and the Three Mile Reservoir as part of the overall contract with the United States Army Corps of Engineers (USACE) to remediate the Colonie Formerly Utilized Sites Remedial Action Program (FUSRAP) Site. The Unnamed Tributary formerly flowed through

  20. Groundwater flow dynamic investigation without drilling boreholes

    NASA Astrophysics Data System (ADS)

    Moustafa, Mahmoud

    2015-02-01

    The flow net map is a basic tool for groundwater flow dynamics investigation. In areas where there are no boreholes or piezometers are not available, constructing flow net map may be difficult. This work proposes a simple methodology to construct flow net map without drilling boreholes. The flow net map constructed using the proposed approach represents an expected flow net map, which can draw conceptual flow model of the site. The major benefit from constructing the expected flow net map is it gives guidance for locating new boreholes for site investigation, carrying out investigation of the groundwater flow directions and estimating recharge/discharge from the site boundary. An illustrative example for the proposed approach was presented to show how the data required to construct the expected flow net map can be collected. The constructed, expected flow net map using the proposed methodology was compared with actual flow net map constructed from measured water levels. Both maps give consistent hydrological information about the site. The suggested approach represents a simple and cheap way to carry out investigation of groundwater flow dynamics in areas where there are no boreholes are available.

  1. Thaumasite investigations to M4 overbridges

    Microsoft Academic Search

    S. J. Collard-Jenkins; E. Ilett; D. Pearson-Kirk

    2003-01-01

    In March 1998, thaumasite sulfate attack (TSA) was discovered affecting several buried raking supports of the Golden Valley Interchange at Junction 11 of the M5 Motorway in Gloucestershire. Following this discovery and the subsequent issue of the Thaumasite Expert Group Report in January 1999, the Highways Agency required all Network Agencys to investigate the likelihood and extent of any such

  2. Investigative and In-Depth Reporting.

    ERIC Educational Resources Information Center

    Bolch, Judith; Miller, Kay

    Using the case history approach, this book examines each step of the news gathering process and shows, through numerous examples drawn from the experiences of professional reporters, the procedures to use in tracking down and developing a story. The eight chapters discuss the following topics: background information on investigative reporting;…

  3. Methods & Strategies: Developing Investigative Skills Purposefully

    ERIC Educational Resources Information Center

    Pellathy, Stephen L.; Paul, John; Cartier, Jennifer L.; Wittfeldt, Claudia

    2007-01-01

    Members of a team of educators and university students participating in the project, Pittsburgh Partnership for Energizing Science in Urban Schools, addressed the issue of helping students develop investigative skills within the context of an introductory science unit for fourth graders. The unit focuses on data-collection techniques and is a…

  4. Investigating hydrogel dosimeter decomposition by chemical methods

    NASA Astrophysics Data System (ADS)

    Jordan, Kevin

    2015-01-01

    The chemical oxidative decomposition of leucocrystal violet micelle hydrogel dosimeters was investigated using the reaction of ferrous ions with hydrogen peroxide or sodium bicarbonate with hydrogen peroxide. The second reaction is more effective at dye decomposition in gelatin hydrogels. Additional chemical analysis is required to determine the decomposition products.

  5. Investigation of Lasso Peptides Maturation Enzymes

    E-print Network

    Petta, Jason

    Investigation of Lasso Peptides Maturation Enzymes Ángel L. Placeres PCCM/PRISM 2012 REU. · Unable to make Astexin-1 in vitro. · Strong possibility that Astexin-1 enzymes are better behaved than the MccJ25 enzymes. #12;Astic C · Maturation Enzyme. · Part of the gene cluster that helps make the lasso

  6. The Solar Oscillations Investigation - Michelson Doppler Imager

    Microsoft Academic Search

    P. H. Scherrer; R. S. Bogart; R. I. Bush; J. T. Hoeksema; A. G. Kosovichev; J. Schou; W. Rosenberg; L. Springer; T. D. Tarbell; C. J. Wolfson; I. Zayer

    1995-01-01

    The Solar Oscillations Investigation (SOI) uses the Michelson Doppler Imager (MDI) instrument to probe the interior of the Sun by measuring the photospheric manifestations of solar oscillations. Characteristics of the modes reveal the static and dynamic properties of the convection zone and core. Knowledge of these properties will improve our understanding of the solar cycle and of stellar evolution. Other

  7. An Investigation on Students' Perceptions of Biodiversity

    ERIC Educational Resources Information Center

    Yorek, Nurettin; Aydin, Halil; Ugulu, Ilker; Dogan, Yunus

    2008-01-01

    In this study, pupils' constructions of some concepts related to biodiversity like classifying living things, variation in living things and ecosystem elements, and the concept of life were investigated in the light of constructivist theory of learning. For this purpose, a biological diversity conceptual understanding test formed by a series of…

  8. Using Ants To Investigate the Environment.

    ERIC Educational Resources Information Center

    Hagevik, Rita A.

    2003-01-01

    Describes three inquiry-based activities designed for students to begin to understand complex environmental relationships in their own backyard. Includes investigations of ants, which allow students to establish a baseline survey of ant fauna, test the importance of ants in nutrient cycling and soil structure maintenances, and increase student…

  9. Using Ants to Investigate the Environment

    ERIC Educational Resources Information Center

    Hagevik, Rita A.

    2005-01-01

    The best place for students to begin to understand complex environmental relationships is in their own back yards. Doing investigations of ants allows students to establish a baseline survey of ant fauna, test the importance of ants in nutrient cycling and soil structure maintenance, and increase their understanding of the environment and their…

  10. Phenology and Biology of Climate Change Investigation

    NSDL National Science Digital Library

    Digital RMBL (Rocky Mountain Biological Laboratory)

    This lesson is an investigation of the impact of climate change on the phenology of a variety of taxa, including migrating birds and hibernating animals in the Colorado Rockies. Students analyze 40 years of data collected by Billy Barr from the Rocky Mountain Biological Laboratory.

  11. Bark Beetle Infestation Investigation: Estimation and Pheromones

    NSDL National Science Digital Library

    2012-05-14

    This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo. Learners also think about how pheromones could be used to trap the beetles. The activity is written for a kit that can be checked out of a library, but the kit is not necessary.

  12. A serious game for traffic accident investigators

    E-print Network

    Romano, Daniela

    to enhance the performances of the police officers to address some of the problems identifiedA serious game for traffic accident investigators 1. INTRODUCTION All new police officers recruited with the current training process in Dubai Police (BinSubaih et al, 2005a). The general problem with training

  13. Investigating Diffusion of Molecules in Liquid

    NSDL National Science Digital Library

    Jean Karschnia Valley Crossing Community School Woodbury, MN

    This activity is a guided inquiry of how molecules move in liquid. Students develop questions, use their observation skills to describe what they saw, record and analyze their findings, and use their data to begin to hypothesize what is happening in the investigation.

  14. Experimental Techniques for Investigating Chaos in Electronics

    E-print Network

    Tse, Chi K. "Michael"

    . The quest for an explanation for the observed unusual behavior mo- tivates in-depth analysis18 Experimental Techniques for Investigating Chaos in Electronics Chi K. Tse 1 Department of experimental measurements and computer simulations in the study of nonlinear systems. A tutorial overview

  15. Using Simulations to Investigate Management Decision Making.

    ERIC Educational Resources Information Center

    Prohaska, Charles R.; Frank, Ellen J.

    1990-01-01

    Describes a pilot investigation that used a computer-based total enterprise simulation as a research methodology for studying management decision making with students in an MBA program. Discussion of performance criteria highlights return on investment (ROI) as the best measure of group performance, and future research needs are suggested. (eight…

  16. Investigation of Multistage Approaches to Examination Timetabling

    E-print Network

    Bargiela, Andrzej

    examination timetabling benchmark show that the performance of Variable Neighbourhood Search great deluge are commonly used as construction heuristics in examination timetabling. On the other hand, an improvementMISTA 2013 Investigation of Multistage Approaches to Examination Timetabling Syariza Abdul Rahman

  17. Investigation of cable deterioration inside reactor containment

    Microsoft Academic Search

    R. L. Clough; K. T. Gillen

    1982-01-01

    The deterioration of polyethylene and polyvinyl chloride cable materials in the containment building of an operating nuclear reactor has been investigated. Since the maximum dose experienced by the cable materials was only 2.5 Mrad during about 12 yr of operating life, the extent of material degradation was surprising. Laboratory aging experiments on the two materials established that the cause of

  18. Woodbiological investigations on panels of rembrandt paintings

    Microsoft Academic Search

    J. Bauch; D. Eckstein

    1981-01-01

    Paintings on 150 wooden panels accepted and not accepted as authentic Rembrandts were investigated using wood-anatomical and dendrochronological techniques. Paintings on 131 panels came from oaks in the coastal area of the Netherlands and 1 panel came from an oak in the interior. The wood of the remaining 18 panels was from beech, poplar and walnut, presumably from the Netherlands,

  19. Research Investigation of Information Access Methods

    ERIC Educational Resources Information Center

    Heinrichs, John H.; Sharkey, Thomas W.; Lim, Jeen-Su

    2006-01-01

    This study investigates the satisfaction of library users at Wayne State University who utilize alternative information access methods. The LibQUAL+[TM] desired and perceived that satisfaction ratings are used to determine the user's "superiority gap." By focusing limited library resources to address "superiority gap" issues identified by each…

  20. Investigation of micropaleontological and paleomagnetic data

    NSDL National Science Digital Library

    Stephen Schellenberg

    After exposure to the basic concepts of biostratigraphy and magnetostratigraphy, participants apply these concepts to produce a biomagnetostratigraphic age model using microfossil and paleomagnetic data from a Paleogene core recovered from Walvis Ridge in the South Atlantic (Ocean Drilling Program Site 1262). The investigation has three parts: First, observed first and last occurrences of various planktonic foraminifera species at different core depths are given absolute ages through reference to the Berggren et al. (1985) time-scale. Second, these planktonic foraminiferal data are used to identify magnetic reversals within the same core and thereby assign absolute ages to these events. Third, the resulting biomagnetostratigraphic age model is used to estimate the time between two well-documented "hyperthermals" within the core, the Paleocene-Eocene Thermal Maximum (PETM) and the Eocene Layer of Mysterious Origin (ELMO). The investigation illustrates how biostratigraphy and magnetostratigraphy complement one another and together provide an operational time-domain for all subsequent studies, be they paleoceanographic, evolutionary, etc. Note that this investigation operates on an established timescale (i.e., Berggren et al, 1985) and does not explictly demonstrate how such timescales are developed. Thus, instructors are encouraged to have students construct a simple composite relative time scale from basic outcrop data prior to this investigation.

  1. Dynamical and photometric investigation of comets

    NASA Technical Reports Server (NTRS)

    Sekanina, Z.

    1980-01-01

    The findings of dynamic and photometric investigations of comets are summarized, and include discussions of the comets Bennett 1970 II, Kohoutek 1973f, West 1976 VI, and periodic comets d'Arrest, Encke, and Swift Tuttle. The phenomena examined include striated and anomalous tails, tail composition and the dynamics of vaporizing dust particles, the evolution of dust jets, and split and dissipating comets.

  2. Numerical investigations of the evolution of sandpiles

    Microsoft Academic Search

    Volkhard Buchholtz; Thorsten Pöschel

    1994-01-01

    The evolution of a pile of granular material is investigated by molecular dynamics using a new model including nonsphericity of the particles instead of introducing static friction terms. The angle of repose of the piles as well as the avalanche statistics gathered by the simulation agree with experimental results. The angle of repose of the pile is determined by the

  3. Clean Waters of Rhode Island Primary Investigators

    E-print Network

    Rhode Island, University of

    Clean Waters of Rhode Island Primary Investigators Harold Knickle Donald Gray #12;Final Report Clean Waters of Rhode Island By Harold Knickle and Donald Gray Department of Chemical Engineering University of Rhode Island Kingston, Rhode Island 02881 May 2007 #12;Abstract There were two thrusts

  4. INVESTIGATING LIGHTLY SUPERVISED ACOUSTIC MODEL TRAINING

    E-print Network

    INVESTIGATING LIGHTLY SUPERVISED ACOUSTIC MODEL TRAINING Lori Lamel, Jean-Luc Gauvain, Gilles Adda%. However, acoustic model development for the recognizers requires large corpora of manually transcribed differ- ent levels of supervision for acoustic model training in order to re- duce the system development

  5. INVESTIGATION A Resolution of the Mutation Load

    E-print Network

    Keightley, Peter

    INVESTIGATION A Resolution of the Mutation Load Paradox in Humans Yann Lesecque,*,,1 Peter D survival or fertility. It has been argued that the mutation load, the proportional reduction in population to reproduce. Deleterious mutations therefore impose a cost or load on the population. The evolutionary

  6. The Investigation of Motor Cooling Performance

    Microsoft Academic Search

    Chih-Chung Chang; Sy-Chi Kuo; Chen-Kang Huang; Sih-Li Chen

    2009-01-01

    This study experimentally and numerically investigates motor cooling performance. The motor consists of a centrifugal fan, two axial fans, a shaft, a stator, a rotor and a heat exchanger with 637 cooling tubes. The pressure rise-flow rate (P-Q) performance curves of the cooling fans at 1800 rpm are tested using a test apparatus complying with the Chinese National Standard (CNS)

  7. NEW INVESTIGATOR GRANT MRF GRANT REGULATIONS & GUIDELINES

    E-print Network

    Chapman, Michael S.

    NEW INVESTIGATOR GRANT MRF GRANT REGULATIONS & GUIDELINES FOR ADMINISTRATION OF GRANTS AWARDED BY THE MEDICAL RESEARCH FOUNDATION COMMITTEE OF OREGON REGULATIONS 1. MRF grants are awarded to institutions. The grantee institution will account for expenditures at the close of the grant period. 2. Funds will be used

  8. Investigation into Bandwidth Limitations of Microstrip Reflectarrays

    Microsoft Academic Search

    Khalil H. Sayidmarie; M. E. Bialkowski

    2008-01-01

    The paper describes theoretical investigations into the bandwidth limitations of a microstrip reflectarray which uses variable size antenna elements for its phasing. Three main factors limiting the bandwidth are considered. The first one is related to the phase compensation that is required to convert a spherical wavefront launched by the feed into a planar wavefront. The second one is linked

  9. Consumer ethics: a cross-cultural investigation

    Microsoft Academic Search

    Jamal A. Al-Khatib; Scott J. Vitell; Mohammed Y. A. Rawwas

    1997-01-01

    In recent years, business ethics has drawn increased interest from business and marketing practitioners as well as from academicians. Despite the repeated call in the literature for cross-cultural research in this age of globalization, virtually no studies have examined the ethical beliefs and ideologies of foreign consumers and compared them to those of US consumers. Investigates the ethical beliefs, preferred

  10. Theoretical investigation of the microwave electron gun

    Microsoft Academic Search

    J. Gao

    1990-01-01

    In this article the microwave electron gun (rf gun) is investigated theoretically in a general way. After a brief review of the sources of emittance growth in a cavity, the optimization criteria are given and optimized electric field distributions on the axes of the cavities are found, from which cavities for a rf gun can be designed.

  11. Psychological Approaches for Investigating Women's Career Advancement

    Microsoft Academic Search

    Phyllis Tharenou

    1990-01-01

    The investigation by psychologists of women's work-rôle achievements and career advancement, especially into the managerial rôle, is classified into two broad categories of conceptual approach. The traditional orientation, emphasising person-centred explanations for women's lack of advancement, is contrasted with the more contemporary approaches, which consider the person in relation to contextual factors. It is argued that social cognition theory, with

  12. INVESTIGATION Gene Genealogies Within a Fixed Pedigree,

    E-print Network

    INVESTIGATION Gene Genealogies Within a Fixed Pedigree, and the Robustness of Kingman's Coalescent, not as a random quantity. Gene genealogical models should describe the outcome of the percolation of genetic provide a surprisingly accurate description of gene genealogies on a fixed pedigree. We study

  13. Investigations in particle physics and cosmology

    SciTech Connect

    White, M.

    1992-01-01

    This thesis divides naturally into three parts. The first deals with the use of gravitational lensing as a probe of cosmology: An analysis of the limits on the cosmological constant that can be inferred from lensing statistics, paying particular attention to lensing models and sources of uncertainty; and an investigation into the use of lens systems as probes of a changing gravitational constant. The second part is a report on investigations of the solar neutrino problem. Using extensive numerical calculations of the propagation of neutrinos through the sun and the response of the Homestake and Kamiokande detectors, the Homestake and Kamiokande data sets are utilized to investigate which models may or may not fit the data. The dependence of conclusions on the treatment of the data sets is discussed. The viability of some solar-model-based solutions to the problem is also investigated. Part three deals with the search for the Higgs boson at the two proposed supercolliders: LHC and SSC. Calculations of previously unconsidered backgrounds to Higgs production in association with top, anti-top pairs are presented. Based on this a brief analysis of electromagnetic calorimetry requirements for an observable signal is discussed.

  14. 20 Investigating Policy Processes: The Governance Analytical

    E-print Network

    Richner, Heinz

    403 20 Investigating Policy Processes: The Governance Analytical Framework (GAF) Marc Hufty1 between the use of the concept for prescriptive and analytical purposes. The present article is based networks, leading to the development of the Govern- ance Analytical Framework (GAF). The GAF is a practical

  15. Investigating Web Searching Behavior in Home Environments.

    ERIC Educational Resources Information Center

    Rieh, Soo Young

    2003-01-01

    Investigates situational elements of the home as a Web use environment, examining how domestic settings influenced people's Web search activities and behaviors. The subjects, 12 participants in 10 households, were found to search on the Web more frequently, more briefly, and less intensely for broader and more diverse information. Results have…

  16. Investigating Probability with the NBA Draft Lottery.

    ERIC Educational Resources Information Center

    Quinn, Robert J.

    1997-01-01

    Investigates an interesting application of probability in the world of sports. Considers the role of permutations in the lottery system used by the National Basketball Association (NBA) in the United States to determine the order in which nonplayoff teams select players from the college ranks. Presents a lesson on this topic in which students work…

  17. Investigation of helicon ion source extraction systems.

    PubMed

    Mordyk, S; Miroshnichenko, V; Shulha, D; Storizhko, V

    2008-02-01

    Various versions of an extraction system for a helicon ion source have been investigated in high plasma density (>10(12) cm(-3)) modes. The measurements of the plasma density were carried out with a microwave interferometer. Experiments were performed with hydrogen and helium gases. The preliminary results indicate that specially designed extractors are very promising for improving ion beam paraxial brightness. PMID:18315198

  18. Investigation of helicon ion source extraction systems

    SciTech Connect

    Mordyk, S.; Miroshnichenko, V.; Shulha, D.; Storizhko, V. [Institute of Applied Physics (IAP), NAS Ukraine (NASU), Sumy 40030 (Ukraine)

    2008-02-15

    Various versions of an extraction system for a helicon ion source have been investigated in high plasma density (>10{sup 12} cm{sup -3}) modes. The measurements of the plasma density were carried out with a microwave interferometer. Experiments were performed with hydrogen and helium gases. The preliminary results indicate that specially designed extractors are very promising for improving ion beam paraxial brightness.

  19. Numerical investigation of anisotropically driven developed turbulence

    Microsoft Academic Search

    E. A. Hayryan; E. Jurcisinova; M. Jurcisin; M. Stehlik

    2007-01-01

    The fully developed turbulence with axial anisotropy for dimensions d > 2 is investigated by means of renormalization group approach. The corresponding system of strongly nonlinear renormalization group equations which contain angle integrals is solved numerically. Possible utilization of the parallel programming methods is discussed. As a result, the influence of anisotropy on the stability of the Kolmogorov scaling regime

  20. Investigating Citizenship: An Agenda for Citizenship Studies

    Microsoft Academic Search

    Engin F. Isin; Bryan S. Turner

    2007-01-01

    This essay takes stock of our editorial collaboration in the past decade and outlines those ideas that we find most promising and approaches that are most fruitful in investigating citizenship. We offer it as an agenda; not so much a dogmatic sequence of principles as an ethos toward conceiving democratic citizenship as a cosmopolitan virtue. We propose a cosmopolitan mobility

  1. Procedures for ground-water investigations

    SciTech Connect

    Not Available

    1992-12-01

    This manual was developed by the Pacific Northwest Laboratory (PNL) to document the procedures used to carry out and control the technical aspects of ground-water investigations at the PNL. Ground-water monitoring procedures are developed and used in accordance with the PNL Quality Assurance Program.

  2. Shallow seismic investigations in the Valles Caldera

    E-print Network

    West, Michael

    Shallow seismic investigations in the Valles Caldera Presented by: Michael West, New Mexico State component of JTEX · Three lines centered on caldera · NW-SE deployed in 1993 · E-W & SW-NE in 1995 velocity material beneath rift · Strong contrast between east and west sides · Hint of Valle Grande caldera

  3. A Systems Approach to Investigating Interpersonal Strife.

    ERIC Educational Resources Information Center

    Kunce, Joseph T.; And Others

    1984-01-01

    Investigated the relationships between computer-simulated, in-vitro interactional personality behavior and various indices of interpersonal relationships using data collected from 31 families. Analysis showed that strife was allied most closely with rigid, unstable interpersonal interactions. Concluded that the systems approach offers a unique,…

  4. Investigating Pedagogical Value of Wiki Technology

    ERIC Educational Resources Information Center

    Hazari, Sunil; North, Alexa; Moreland, Deborah

    2009-01-01

    This exploratory study investigates the potential of Wiki technology as a tool for teaching and learning. Wikis are a component of Web 2.0 technology tools that provide collaborative features and active learning opportunities in a web-based environment. This research study sought to empirically determine the pedagogical value of using Wiki…

  5. Investigating Our Environment. Science: Grade 6.

    ERIC Educational Resources Information Center

    New York City Board of Education, Brooklyn, NY. Bureau of Curriculum Development.

    Intended mainly for use in the intermediate grades, this document provides demonstrations, field trips and laboratory experiences designed to help students investigate the role that people play in problems associated with environmental quality, pollution, and ecology in general. The book was developed as an alternative program to the regular sixth…

  6. Korean Books and FRBR: An Investigation

    ERIC Educational Resources Information Center

    Kim, Jeong-Hyen; Moon, Ji-Hyun

    2010-01-01

    Purpose: The purpose of this study is to investigate the characteristics of Korean books by analysing their "work types" based on the Functional Requirements for Bibliographic Records (FRBR) model. Design/methodology/approach: A total of 1,000 Korean books were randomly chosen from the Korean National Bibliography (KNB) 2008 at the National…

  7. Investigating Contingency Awareness Using Atari 2600 Games

    E-print Network

    Bowling, Michael

    Investigating Contingency Awareness Using Atari 2600 Games Marc G. Bellemare and Joel Veness Contingency awareness is the recognition that some aspects of a future observation are under an agent of contingency awareness in reinforce- ment learning using the platform of Atari 2600 games. We introduce

  8. Investigating Adolescent Stress and Body Image

    ERIC Educational Resources Information Center

    Murray, Kristen M.; Byrne, Don G.; Rieger, Elizabeth

    2011-01-01

    Adolescent stress is clearly implicated in the development of mental health problems. However, its role in dysfunctional body image, which rises markedly in adolescence, has not been investigated. The present study examined the link between stress and body image, as well as self-esteem and depressive symptoms, in 533 high school students in grades…

  9. Buried Alive! An Investigation of Plant Dormancy

    ERIC Educational Resources Information Center

    Allen, Ashley J.; Balschweid, Mark; Hammond, Paul; Henderson, Brian; Johnson, Peggy A.; Kite, Abigayle; Martin, Stephanie

    2004-01-01

    In this investigation, pairs of upper elementary students test germination percentage using seeds of Indian corn ("Zea mays"), scarlet runner beans ("Phaseolus coccineus"), and the prairie cup-plant ("Silphium perfoliatum") grown on rolled, damp paper towels. The pairs compare seeds that have been stratified, a simulation of overwintering and…

  10. Teachers and Students Investigating Plants in Space

    NSDL National Science Digital Library

    In this activity students will grow "AstroPlants," a special fast-growing plant used in Space Shuttle microgravity experiments. They will become familiar with the growth process and life cycle of the plants and investigate the effects of gravity and light on plant orientation and guidance.

  11. ORIGINAL INVESTIGATION Marital Quality and Occurrence

    E-print Network

    Gallo, Linda C.

    ORIGINAL INVESTIGATION Marital Quality and Occurrence of the Metabolic Syndrome in Women Wendy M the metabolic syndrome compared with other women. Methods: Four hundred thirteen middle-aged women from and 3 years later. Metabolic syndrome (diagnosed according to the criteria of the National Cholesterol

  12. INVESTIGATION Precise and Heritable Genome Editing in

    E-print Network

    Meyer, Barbara

    INVESTIGATION Precise and Heritable Genome Editing in Evolutionarily Diverse Nematodes Using TALENs using site-specific nucleases to modify the Caenorhabditis elegans genome achieved only the heritable and homology-directed repair to create heritable, precise insertion, deletion, or substitution of specific DNA

  13. An Investigation of Second-Language Teaching.

    ERIC Educational Resources Information Center

    Agard, Frederick B.; Dunkel, Harold B.

    This investigation of high school and college language programs in the 1940's presents information on the objectives of language teaching and the measurement of language proficiency. An aural-oral testing program is described, and the aural-oral experimental groups are compared with conventionally taught classes. Advanced levels of language skill…

  14. Framework for a Digital Forensic Investigation

    Microsoft Academic Search

    Michael Kohn; Martin S. Olivier; Jan H. P. Eloff

    2006-01-01

    Computer Forensics is essential for the successful prosecution of computer criminals. For a forensic investigation to be performed successfully there are a number of important steps that have to be considered and taken. The aim of this paper is to define a clear, step-by-step framework for the collection of evidence suitable for presentation in a court of law. Existing forensic

  15. LAUSD's Business Services Center. An Investigative Report.

    ERIC Educational Resources Information Center

    Armoudian, Maria

    An investigative report examines the Los Angeles Unified School District's (LAUSD's) attempt to obtain emergency funding, following the Los Angeles earthquake, for its abandoned Business Services Center (BSC). It examines the LAUSD's declaration of emergency and the pursuit of emergency funds, the district's search for replacement office space,…

  16. The GGS\\/POLAR magnetic fields investigation

    Microsoft Academic Search

    C. T. Russell; R. C. Snare; J. D. Means; D. Pierce; D. Dearborn; M. Larson; G. Barr; G. Le

    1995-01-01

    The magnetometer on the POLAR Spacecraft is a high precision instrument designed to measure the magnetic fields at both high and low altitudes in the polar magnetosphere in 3 ranges of 700, 5700, and 47000 nT. This instrument will be used to investigate the behavior of fieldaligned current systems and the role they play in the acceleration of particles, and

  17. Spill Sleuths: An Interdisciplinary Environmental Health Investigation

    ERIC Educational Resources Information Center

    Rudensey, Lyle; Whidden, Jeff

    2005-01-01

    "We are on the eve of total contamination," said an eighth grade "toxicologist" at a mock town meeting at Mount Baker Middle School in Mount Vernon, Washington. The meeting was the culmination of a month-long investigation by students to determine why some of the townspeople were getting sick. During the unit, students used skills from several…

  18. AUGER ELECTRON SPECTROSCOPY AND ELECTROCHEMICAL INVESTIGATIONS

    Microsoft Academic Search

    D. Saidi; B. Zaid; N. Souami; M. Negache; A Si Ahmed

    2009-01-01

    The fractured faces of 12%Cr martensitic stainless steel specimens, virgin material (sample 1) and material having been in service in steam turbine (sample 2), were investigated by Auger electron spectroscopy , scanning electron microscopy SEM. Pitting corrosion behaviour of the same specimens was also examined by potentiodynamic cyclic polarisation techniques. For the samples 1, the brittle and intergranular fracture mode

  19. Investigating the Intron Recognition Mechanism in Eukaryotes

    Microsoft Academic Search

    Lesley Collins; David Penny

    2006-01-01

    Recent studies indicate that many introns, as well as the complex spliceosomal mechanism to remove them, were present early in eukaryotic evolution. This study examines intron and exon characteristics from annotations of whole genomes to investigate the intron recognition mechanism. Exon definition uses the exon as the unit of recognition, placing length constraints on the exon but not on the

  20. Combinatorial investigation of ferromagnetic shape memory materials

    Microsoft Academic Search

    Olugbenga O. Famodu

    2005-01-01

    Combinatorial synthesis is research methodology which allows one to systemically study a large number of compositionally varying samples simultaneously. We apply this technique to the investigation of multifunctional materials. Different designs of combinatorial libraries and various characterization tools are implemented in order to rapidly map composition-structure-property relationships in a variety of materials systems. In this thesis, I will discuss combinatorial