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1

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

Microsoft Academic Search

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

Justinian Anatory; Nelson Theethayi; Mussa Kissaka; Nerey Mvungi

2007-01-01

2

30 CFR 77.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2012 CFR

...medium-voltage ground check monitor circuits. 77.902 Section 77.902 Mineral...Medium-Voltage Alternating Current Circuits § 77.902 Low- and medium-voltage ground check monitor circuits. On and after September...

2012-07-01

3

30 CFR 75.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2011 CFR

...medium-voltage ground check monitor circuits. 75.902 Section 75.902 Mineral...Medium-Voltage Alternating Current Circuits § 75.902 Low- and medium-voltage ground check monitor circuits. [Statutory Provisions]...

2011-07-01

4

30 CFR 75.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2010 CFR

...medium-voltage ground check monitor circuits. 75.902 Section 75.902 Mineral...Medium-Voltage Alternating Current Circuits § 75.902 Low- and medium-voltage ground check monitor circuits. [Statutory Provisions]...

2010-07-01

5

30 CFR 77.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2010 CFR

...medium-voltage ground check monitor circuits. 77.902 Section 77.902 Mineral...Medium-Voltage Alternating Current Circuits § 77.902 Low- and medium-voltage ground check monitor circuits. On and after September...

2010-07-01

6

30 CFR 75.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2013 CFR

...medium-voltage ground check monitor circuits. 75.902 Section 75.902 Mineral...Medium-Voltage Alternating Current Circuits § 75.902 Low- and medium-voltage ground check monitor circuits. [Statutory Provisions]...

2013-07-01

7

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

Code of Federal Regulations, 2013 CFR

...trailing cables for medium-voltage circuits. 75.907 Section 75.907 Mineral...Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory Provisions]...

2013-07-01

8

30 CFR 77.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2011 CFR

...medium-voltage ground check monitor circuits. 77.902 Section 77.902 Mineral...Medium-Voltage Alternating Current Circuits § 77.902 Low- and medium-voltage ground check monitor circuits. On and after September...

2011-07-01

9

30 CFR 77.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2014 CFR

...medium-voltage ground check monitor circuits. 77.902 Section 77.902 Mineral...Medium-Voltage Alternating Current Circuits § 77.902 Low- and medium-voltage ground check monitor circuits. On and after September...

2014-07-01

10

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

Code of Federal Regulations, 2012 CFR

...trailing cables for medium-voltage circuits. 75.907 Section 75.907 Mineral...Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory Provisions]...

2012-07-01

11

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

Code of Federal Regulations, 2014 CFR

...trailing cables for medium-voltage circuits. 75.907 Section 75.907 Mineral...Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory Provisions]...

2014-07-01

12

30 CFR 75.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2012 CFR

...medium-voltage ground check monitor circuits. 75.902 Section 75.902 Mineral...Medium-Voltage Alternating Current Circuits § 75.902 Low- and medium-voltage ground check monitor circuits. [Statutory Provisions]...

2012-07-01

13

30 CFR 77.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2013 CFR

...medium-voltage ground check monitor circuits. 77.902 Section 77.902 Mineral...Medium-Voltage Alternating Current Circuits § 77.902 Low- and medium-voltage ground check monitor circuits. On and after September...

2013-07-01

14

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

Code of Federal Regulations, 2010 CFR

...trailing cables for medium-voltage circuits. 75.907 Section 75.907 Mineral...Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory Provisions]...

2010-07-01

15

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

Code of Federal Regulations, 2011 CFR

...trailing cables for medium-voltage circuits. 75.907 Section 75.907 Mineral...Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory Provisions]...

2011-07-01

16

30 CFR 75.902 - Low- and medium-voltage ground check monitor circuits.  

Code of Federal Regulations, 2014 CFR

...medium-voltage ground check monitor circuits. 75.902 Section 75.902 Mineral...Medium-Voltage Alternating Current Circuits § 75.902 Low- and medium-voltage ground check monitor circuits. [Statutory Provisions]...

2014-07-01

17

Emission Characteristics and Interference Constraint of Overhead Medium-Voltage Broadband Power Line (BPL) Systems  

Microsoft Academic Search

We investigate the measurement, interference and capacity issues of the overhead medium-voltage (MV) broadband over power line (BPL) systems operating between 1.7 and 80 MHz. The MV power lines are modeled as a 3-phase set of parallel wires with infinite length and above a lossy earth. Electric field strength is calculated. Two important parameter settings are addressed for the measurement

Song Liu; Larry J. Greenstein

2008-01-01

18

Capacity of Overhead Medium Voltage Power Line Communication Channels  

Microsoft Academic Search

This paper considers broadband transmission via the overhead medium voltage (MV) grid. The MV broadband over power lines (MV\\/BPL) channels considered are three-phase overhead MV lines above lossy plane ground. To determine the end-to-end transfer function of any MV\\/BPL configuration the scattering matrix method is adopted. Various topologies of MV\\/BPL transmission channels have been studied with regard to their end-to-end

Athanasios G. Lazaropoulos; Panayiotis G. Cottis

2010-01-01

19

Series-stacked medium voltage electronic voltage regulator  

Microsoft Academic Search

This paper discusses the development of a series- stacked medium-voltage electronic voltage regulator for the pur- pose of regulating the voltage on a 22 kV three-phase transmission line. The three-phase regulator consists of three independent 12.75 kV regulator cells, connected in a star configuration. Each regulator cell consists of an autotransformer with one common and two series windings. An AC-to-AC

Males Tomlinson; Dewald Abrie; Toit Mouton

2011-01-01

20

Commercialization of Medium Voltage HTS Triax TM Cable Systems  

SciTech Connect

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.

Knoll, David

2012-12-31

21

Medium voltage overhead power-line broadband communications; transmission capacity and electromagnetic interference  

Microsoft Academic Search

A channel model suitable for multi-wire overhead medium-voltage lines is proposed. This model is then employed in order to evaluate the multipath channel impulse response and the associated transmission capacity limit in actual overhead medium-voltage power distribution networks for broadband power-line communications applications. Electromagnetic interference limitations of such systems are discussed.

P. Amirshahi; M. Kavehrad

2005-01-01

22

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

Code of Federal Regulations, 2013 CFR

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

2013-07-01

23

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

Code of Federal Regulations, 2012 CFR

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

2012-07-01

24

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

Code of Federal Regulations, 2011 CFR

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

2011-07-01

25

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

Code of Federal Regulations, 2010 CFR

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

2010-07-01

26

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

Code of Federal Regulations, 2014 CFR

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

2014-07-01

27

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

Code of Federal Regulations, 2010 CFR

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

2010-07-01

28

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

Code of Federal Regulations, 2012 CFR

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

2012-07-01

29

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

Code of Federal Regulations, 2013 CFR

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

2013-07-01

30

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

Code of Federal Regulations, 2014 CFR

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

2014-07-01

31

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

Code of Federal Regulations, 2011 CFR

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

2011-07-01

32

30 CFR 77.901 - Protection of low- and medium-voltage three-phase circuits.  

Code of Federal Regulations, 2010 CFR

...2) A grounding circuit originating at...frames of all the electric equipment supplied power from the circuit. (b) Grounding...medium-voltage circuits supplying power...current stationary electric equipment...

2010-07-01

33

30 CFR 77.901 - Protection of low- and medium-voltage three-phase circuits.  

Code of Federal Regulations, 2014 CFR

...2) A grounding circuit originating at...frames of all the electric equipment supplied power from the circuit. (b) Grounding...medium-voltage circuits supplying power...current stationary electric equipment...

2014-07-01

34

30 CFR 77.901 - Protection of low- and medium-voltage three-phase circuits.  

Code of Federal Regulations, 2012 CFR

...2) A grounding circuit originating at...frames of all the electric equipment supplied power from the circuit. (b) Grounding...medium-voltage circuits supplying power...current stationary electric equipment...

2012-07-01

35

30 CFR 77.901 - Protection of low- and medium-voltage three-phase circuits.  

Code of Federal Regulations, 2011 CFR

...2) A grounding circuit originating at...frames of all the electric equipment supplied power from the circuit. (b) Grounding...medium-voltage circuits supplying power...current stationary electric equipment...

2011-07-01

36

30 CFR 77.901 - Protection of low- and medium-voltage three-phase circuits.  

Code of Federal Regulations, 2013 CFR

...2) A grounding circuit originating at...frames of all the electric equipment supplied power from the circuit. (b) Grounding...medium-voltage circuits supplying power...current stationary electric equipment...

2013-07-01

37

Analysis of asset health : an approach to monitoring and diagnostics for medium voltage circuit breakers  

E-print Network

The Medium Voltage Electric Industry is a very conservative and risk adverse sector that has undergone very little change in the past 30 years when compared to other technologically dependent activities; this reality is ...

Corona, Erick (Erick Gustavo)

2013-01-01

38

Model of the arc earth-fault for medium voltage networks  

NASA Astrophysics Data System (ADS)

In this paper the universal model of dynamic short-circuit arcs is presented for simulation of earth-fault in medium voltage networks. The model describes the entire arc short-circuit process: the ignition, the burning stage, the arc extinction and the increasing recovery voltage. Four alternative choices of the characteristics of the static arc are implemented and compared. Simulation results in medium voltage networks are described. Realistic current and voltage time dependencies are obtained.

Marciniak, Lubomir

2011-06-01

39

Power losses evaluation of three multilevel converter topologies for direct interface with medium voltage grids  

Microsoft Academic Search

Acknowledgementsproject this report is based on was funded by E.ON as part of the E.ON International Research Initiative. Responsibility for the content of this publication lies with the author. Abstract paper presents the power losses evaluation and comparison of three different Mega Watt MW scale multilevel converter topologies proposed for interfacing energy storage systems to medium voltage grids using Medium

Mohamed Rashed; Christian Klumpner; Greg Asher

2011-01-01

40

Transmission Channel Model and Capacity of Overhead Multi-conductor Medium-Voltage Power-lines for Broadband Communications  

E-print Network

-voltage power distribution networks for broadband power-line communications applications. Keywords - channelTransmission Channel Model and Capacity of Overhead Multi-conductor Medium-Voltage Power-lines model, impulse response, power-line communications, ground admittance, medium voltage, capacity. I

Kavehrad, Mohsen

41

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

NASA Astrophysics Data System (ADS)

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.

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

2014-05-01

42

Development of Medium-Voltage and Large-Capacity Uninterruptible Power Supply System  

NASA Astrophysics Data System (ADS)

A 2-MVA uninterruptible power supply (UPS) system has been developed for compensating for voltage dips in a medium voltage network. The UPS system realizes a high efficiency (99.7%) during single-pulse switching. In this paper, the UPS configurations, storage devices, and transfer switches are compared. Thereafter, the details of the UPS system, the results of the short-circuit test and the system efficiencies are described.

Fujii, Kansuke; Kikuchi, Takayuki; Yoda, Kazuyuki

43

Interference Evaluation of Overhead Medium-Voltage Broadband Power Line Systems  

Microsoft Academic Search

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

Song Liu; Larry J. Greenstein

2010-01-01

44

Modeling and Interference Evaluation of Overhead Medium-Voltage Broadband Power Line (BPL) Systems  

Microsoft Academic Search

We analyze the radio interference from a Broadband Power Line (BPL) system operating between 2 MHz and several tens of MHz. The overhead medium-voltage (MV) power line is modeled as a 3-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.

Song Liu; Larry J. Greenstein

2007-01-01

45

Broadband Transmission via Underground Medium-Voltage Power Lines—Part I: Transmission Characteristics  

Microsoft Academic Search

The transmission characteristics of underground medium-voltage\\/broadband over power line (MV\\/BPL) channels are examined analytically. By appropriately modifying multiconductor transmission-line theory, the bottom-up approach, already used to treat overhead MV\\/BPL transmission, is extended to analyze BPL transmission in three-phase underground MV lines with common shield and armor. ThIS analysis shows that these cables may support five modes, giving rise to five

Athanasios G. Lazaropoulos; Panayiotis G. Cottis

2010-01-01

46

Ride-Through of Medium Voltage Synchronous Machine Centrifugal Compressor Drives  

Microsoft Academic Search

Medium voltage (MV) synchronous machines (SMs) are expected to ride through adjustable speed drive (ASD) faults, excitation faults, system faults\\/disturbances and supply transfers. Models suitable for direct-on-line and ASD ride-through simula- tions are discussed. Case studies, simulation and test results are presented for an 11 kV ASD for 17 MW SMs and for a 55 MW SM. It is shown

Frieder Endrejat; Pragasen Pillay

2011-01-01

47

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

Microsoft Academic Search

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

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

2003-01-01

48

Calculated sputtering and atomic displacement cross-sections for applications to medium voltage analytical electron microscopy  

SciTech Connect

The development of medium voltage electron microscopes having high brightness electron sources and ultra-high vacuum environments has been anticipated by the microscopy community now for several years. The advantages of such a configuration have been discussed to great lengths, while the potential disadvantages have for the most part been neglected. The most detrimental of these relative to microcharacterization are the effects of electron sputtering and atomic displacement to the local specimen composition. These effects have in the past been considered mainly in the high voltage electron microscope regime and generally were ignored in lower voltage instruments. Recent experimental measurements have shown that the effects of electron sputtering as well as radiation induced segregation can be observed in conventional transmission electron microscopes. It is, therefore, important to determine at what point the effects will begin to manifest themselves in the new generation of medium voltage analytical electron microscopes. In this manuscript we present new calculations which allow the individual experimentalist to determine the potential threshold levels for a particular elemental system and thus avoid the dangers of introducing artifacts during microanalysis. 12 refs., 3 figs.

Bradley, C.R.; Zaluzec, N.J.

1987-08-01

49

The application of a medium voltage (4160 VAC) variable frequency drive on an underground mine belt conveyor system  

Microsoft Academic Search

High performance underground mine conveyor belts require special starting and operating characteristics. This paper is a summary of how a medium voltage (4160 VAC) variable frequency drive (VFD) was used to meet these requirements. The belt drive system consists of a mandated primary switch gear, drive rated transformer with controlled inductance, variable frequency drive, output switchgear and operational requirements. Items

V. L. Kitts; W. K. Stees

2000-01-01

50

Simulation and Laboratory Experimental Tests of a Line to Shield Medium-Voltage Power-Line Communication System  

Microsoft Academic Search

A complete model of a power-line communication (PLC) system on a medium-voltage (MV) network in the case of a line-shield configuration is presented in this paper. An MV cable model in a line-shield configuration is considered together with the power transformers, the signal coupling networks, and the receiving and transmitting line coupling interface of a ST7540 FSK power-line transceiver. Simulations

Antonio Cataliotti; Valentina Cosentino; Dario Di Cara; Giovanni Tine

2011-01-01

51

The Selection Algorithm for Connection Modes of Medium Voltage Power Distribution Network Based on FAHP-GRA  

NASA Astrophysics Data System (ADS)

This paper used fuzzy analytic hierarchy process (FAHP) and gray relational analysis (GRA) to solve the selection for the connection modes of medium voltage (MV) power distribution network. Firstly, it established the comprehensive evaluation indicator system from technicality, economy, and adaptability. Secondly, FAHP can evaluate the indicator weights, and avoid the ambiguity and uncertainty of judgment matrix. Finally, it combined with GRA to complete the comprehensive decision-making. This method also solves the error of the fuzzy albino number caused by fuzzy comprehensive evaluation theory. In the end, a practical example verified the reasonable and practical of this method.

Han, Wu; Han, Lin; Bin, Chen; Han, Wu; ying, Wen Bu

52

A medium frequency transformer with multiple secondary windings for medium voltage converter based wind turbine power generating systems  

NASA Astrophysics Data System (ADS)

Recent advances in magnetic materials have led to the development of compact and light weight, medium and high frequency transformers, which would be a possible solution to reducing the size and weight of wind turbine power generating systems. This paper presents the overall design and analysis of a Metglas amorphous alloy 2605SA1 based medium frequency transformer to generate the isolated balanced multiple DC supplies for medium voltage converter systems. A comprehensive electromagnetic analysis is conducted on the proposed design based on experimental results. The test stand, data analysis, and test results are discussed.

Islam, Md Rabiul; Guo, Youguang; Zhu, Jianguo

2013-05-01

53

Analysis and Design of Power Electronic Transformer for Medium Voltage Levels  

Microsoft Academic Search

One key component of the future automation is replacement of conventional distribution transformers by an all-solid-state (power-electronic) alternative. In this paper, the optimum design of a power electronic transformer (PET) is investigated. In the design process, the PFC and DC-DC converters have been integrated to achieve higher efficiency. The proposed PET performs typical functions and has advantages such as power

H. Iman-Eini; S. Farhangi

2006-01-01

54

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

NASA Astrophysics Data System (ADS)

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.

Kondo, Ryota; Akagi, Hirofumi

55

A Medium-Voltage Motor Drive with a Modular Multilevel PWM Inverter Part II. Startup Method and Performance  

NASA Astrophysics Data System (ADS)

This paper presents a medium-voltage motor drive with a modular multilevel PWM inverter, and focuses on a startup method and its performance. It is formed by six modular arms, each of which consists of a cascaded stack of multiple bidirectional chopper-cells. The frequency of the dominant ac-voltage fluctuation is equal to the motor (inverter) frequency. These fluctuations occur in the dc capacitor of each chopper-cell, and the magnitude of the fluctuation is inversely proportional to the motor frequency. Because of the increased voltage fluctuation in low-frequency regions, the so-called “volt-per-hertz control” cannot be applied in motor starting. The startup method proposed in this paper is suitable for a motor drive with the modular multilevel PWM inverter. It enables the motor to produce a startup torque loaded on the motor at an initial amplitude and a fixed frequency of the inverter while taking into account constraints on the motor current and the ac-voltage fluctuation. The validity of the startup method as well as the startup performance is confirmed by experiment and simulation.

Nishimura, Kazutoshi; Hagiwara, Makoto; Akagi, Hirofumi

56

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

NASA Astrophysics Data System (ADS)

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 chopper-cell because it may affect the voltage rating of the power switching devices used. This paper describes the theoretical equations related to the amount of the voltage fluctuation. A downscaled model rated at 400V and 15kW is designed and built to confirm the validity and effectiveness of the nine-level (17-level in line-to-line) PWM inverter that is intended for use in medium-voltage motor drives to achieve energy savings.

Hagiwara, Makoto; Nishimura, Kazutoshi; Akagi, Hirofumi

57

Measurements and Modeling of Noise on 22.9kV Medium-Voltage Underground Power Line for Broadband Power Line Communication  

Microsoft Academic Search

\\u000a This paper proposed the measurements and modeling of noise on the 22.9-kV Medium-Voltage (MV) underground power distribution\\u000a cable for Broadband Power Line Communication (BPLC). The proposed measurement system was composed of inductive coupler and\\u000a Digital Phosphor Oscilloscope (DPO). The measurement noise data was obtained from thirty-two pad mounted transformers in the\\u000a test field located in Choji area of Ansan city.

Seungjoon Lee; Donghwan Shin; Yonghwa Kim; Jaejo Lee; Kihwan Eom

2010-01-01

58

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

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.

Erdman, W.; Behnke, M.

2005-11-01

59

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

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.

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

2014-11-01

60

Investigators  

Microsoft Academic Search

We organised a two-day workshop to promote our multi-expertise collaborative project on Chiral Symmetry Breaking in the strong interactions. Including the six investigators in our group, there were twenty-eight participants. Twelve talks were presented, reporting on novel insights and methods: AdS\\/CFT duality of large-Nc QCD to a gravity on AdS5, lattice-QCD and Dyson-Schwinger approaches. The possibility of a separation between

Craig Roberts; Donald Sinclair; Jeff Harvey; David Kutasov; Sophia Domokos; Carlos Wagner

2007-01-01

61

Operation of a Medium-Voltage Drive Under Faulty Conditions  

Microsoft Academic Search

This paper presents a method for operating cascaded multilevel inverters when one or more power cells are damaged. The method is based on the use of additional switches in the power circuit to bypass the faulty cell. To control the cells, the angle of phase shifting in the carrier signals is modified according to the number of operating cells, to

J. Rodriguez; P. W. Hammond; J. Pontt; R. Musalem; P. Lezana; M. J. Escobar

2005-01-01

62

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

NASA Technical Reports Server (NTRS)

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.)

Vorpenian, Vatche

2008-01-01

63

Abb Inc. medium-voltage products' supply chain analysis, including inventory, supplier scorecard, and risk assessments  

E-print Network

In conformance with ABB's process excellence plan, this thesis study was undertaken to support improvements in on-time delivery of components, decreased order cycles, and reduced inventory levels for ADVAC (spring-mechan ...

Gaskins, Tamboura E. (Tamboura Elyse)

2006-01-01

64

Interference characteristics of broadband power line communication systems using aerial medium voltage wires  

Microsoft Academic Search

The promise of broadband power line (BPL) communications - broadband access to virtually every home in the United States - remains unfulfilled if the radio emissions from these systems cause significant harmful interference to other users of the wireless spectrum. This article presents an elementary analysis of the physical mechanisms underlying these emissions, from which the interference characteristics of BPL

P. S. Henry

2005-01-01

65

ESRDC ship notional baseline Medium Voltage Direct Current (MVDC) architecture thermal simulation and visualization  

E-print Network

This work presents a fast visualization and thermal simulation tool developed as part of the Electric Ship Research and Development Consortium (ESRDC) funded by the Office of Naval Research (ONR) that is capable of providing ...

Chryssostomidis, Chryssostomos

2011-01-01

66

Medium Voltage Overhead Power-line Broadband Communications; Transmission Capacity and Electromagnetic Interference  

E-print Network

and Electromagnetic Interference P. Amirshahi and M. Kavehrad (FIEEE) The Pennsylvania State University, Department distribution networks for broadband power-line communications applications. Electromagnetic interference distribution network. Interference issue is discussed and remedies are suggested. II. Analysis of MTL Analysis

Kavehrad, Mohsen

67

Modular converter architecture for medium voltage ultra fast EV charging stations: Global system considerations  

Microsoft Academic Search

Electric Vehicles (EVs) are expected to contribute significantly to the reduction of CO2 emissions and other types of pollution within the next years. However, the concept of their ultra fast charging still poses demanding requirements, both in terms of the EV battery and the impact on the power grid. Towards this direction, emerging power electronics interfaces as well as energy

Michail Vasiladiotis; Alfred Rufer; Antoine Beguin

2012-01-01

68

Stator insulation problems associated with low voltage and medium voltage PWM drives  

Microsoft Academic Search

About 15 years ago, the short risetime pulses caused by voltage source, pulse width modulated converters were first recognized as a cause of stator winding insulation failure in low voltage motors. The root cause was found to be the large number of PWM voltage pulses from the drive, which caused partial discharges between turns in the stator. These discharges eventually

G. C. Stone; I. M. Culbert; B. A. Lloyd

2007-01-01

69

Development, Testing and Installation of a Superconducting Fault Current Limiter for Medium Voltage Distribution Networks  

NASA Astrophysics Data System (ADS)

Since 2009 Ricerca sul Sistema Energetico (RSE S.p.A.) has been involved in the design of resistive-type Superconducting Fault Current Limiter (SFCL) for MV applications to be installed in the A2A Reti Elettriche S.p.A distribution grid in the Milano area. The project started with simulations, design and testing activities for a singlephase device; in this paper we report on the successive step, which is concerned with developing, testing and installation at the hosting utility of the final three-phase SFCL prototype. The result of this research activity is a resistive-type 9 kV/3.4 MVA SFCL device, based on first generation (1G) BSCCO tapes, developed by RSE in the framework of a R&D national project. Owing to the positive test results of partial discharge, dielectric and shortcircuit results the three-phase SFCL device is being to be installed in the A2A distribution grid in the Milano area and it is going to be soon energized starting a one-year long field-testing activity.

Martini, Luciano; Bocchi, Marco; Ascade, Massimo; Valzasina, Angelo; Rossi, Valerio; Angeli, Giuliano; Ravetta, Cesare

70

Passive Harmonic Filters for Medium-Voltage Industrial Systems: Practical Considerations and Topology Analysis  

Microsoft Academic Search

Nowadays, passive harmonic filters are the preferred mitigation scheme for harmonics in power systems. Several types of harmonic filters are available, which are installed according to system topology and to the engineer's judgment. The purpose of this paper is to provide comprehensive information about the most common passive filters and to clarify the design and practical considerations. It compares the

Alexandre B. Nassif; Wilsun Xu

2007-01-01

71

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

SciTech Connect

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.

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

72

Advanced Medium-Voltage Bidirectional DC-DC Conversion Systems for Future Electric Energy Delivery and Management Systems  

Microsoft Academic Search

The distributed renewable energy generation and utilization are constantly growing, and are expected to be integrated with the conventional grid. The growing pressure for innovative solutions will demand power electronics to take an even larger role in future electric energy delivery and management systems, since power electronics are required for the conversion and control of electric energy by most dispersed

Haifeng Fan

2011-01-01

73

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

Microsoft Academic Search

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

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

2009-01-01

74

30 CFR 75.901 - Protection of low- and medium-voltage three-phase circuits used underground.  

Code of Federal Regulations, 2012 CFR

...proper ohmic value to limit the ground fault current to 25 amperes. The grounding resistor shall be rated for maximum fault current continuously and insulated from...must be provided to limit the ground-fault current to not more than 0.5...

2012-07-01

75

30 CFR 75.901 - Protection of low- and medium-voltage three-phase circuits used underground.  

Code of Federal Regulations, 2013 CFR

...proper ohmic value to limit the ground fault current to 25 amperes. The grounding resistor shall be rated for maximum fault current continuously and insulated from...must be provided to limit the ground-fault current to not more than 0.5...

2013-07-01

76

30 CFR 75.901 - Protection of low- and medium-voltage three-phase circuits used underground.  

Code of Federal Regulations, 2014 CFR

...proper ohmic value to limit the ground fault current to 25 amperes. The grounding resistor shall be rated for maximum fault current continuously and insulated from...must be provided to limit the ground-fault current to not more than 0.5...

2014-07-01

77

30 CFR 75.901 - Protection of low- and medium-voltage three-phase circuits used underground.  

Code of Federal Regulations, 2011 CFR

...proper ohmic value to limit the ground fault current to 25 amperes. The grounding resistor shall be rated for maximum fault current continuously and insulated from...must be provided to limit the ground-fault current to not more than 0.5...

2011-07-01

78

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

SciTech Connect

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.

None

2010-09-01

79

30 CFR 75.901 - Protection of low- and medium-voltage three-phase circuits used underground.  

Code of Federal Regulations, 2010 CFR

...from ground for a voltage equal to the phase-to-phase voltage of the system. ...phase-to-phase voltage of the system must...three-phase output circuit of the generator must...75 percent of the minimum available short...

2010-07-01

80

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

NASA Astrophysics Data System (ADS)

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 will describe in details and compare two local water measurement methods using analytical electron microscopy. The first one is based on darkfield imaging. It is applied on freeze-dried biological cryosections; it allows indirect measurement of the water content at the subcellular level from recorded maps of darkfield intensity. The second method uses electron energy loss spectroscopy. It is applied to hydrated biological cryosections. It is based on the differences that appear in the electron energy loss spectra of macromolecular assemblies and vitrified ice in the 0-30 eV range. By a multiple least squares (MLS) fit between an experimental energy loss spectrum and reference spectra of both frozen-hydrated ice and macromolecular assemblies we can deduce directly the local water concentration in biological cryosections at the subcellular level. These two methods are applied to two test specimens: human erythrocytes in plasma, and baker's yeast (Saccharomyses Cerevisiae) cryosections. We compare the water content measurements obtained by these two methods and discuss their advantages and drawbacks.

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

2000-09-01

81

Statistics Investigations  

NSDL National Science Digital Library

This webpage contains statistics 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.

2013-01-01

82

Watershed Investigations  

ERIC Educational Resources Information Center

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…

Bodzin, Alec; Shive, Louise

2004-01-01

83

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.

84

Investigator Resources  

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 Investigator Resources Investigator

85

Investigator Resources  

Cancer.gov

CTEP recognizes the importance of encouraging and supporting young investigators as they embark upon a clinical cancer research career. We have implemented several programs geared to assist young investigators navigate the CTEP program and the LOI development and submission process.

86

Investigator Resources  

Cancer.gov

Below please find instructions to investigators seeking to request specimens from the North American Breast Cancer Group (NABCG) Correlative Sciences Committee (CSC) for use in correlative scientific studies.

87

Watershed Investigations  

NSDL National Science Digital Library

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.

Bodzin, Alec; Shive, Louise

2004-04-01

88

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.

89

Forensics Investigator  

MedlinePLUS

... and if anything is expected to increase in demand. Forensic investigators will always be needed to back up the efforts of other law enforcement officials. Working Conditions & Context Forensic science technicians ...

90

Investigation Organizer  

NASA Technical Reports Server (NTRS)

Contents include the folloving:Overview of the Application; Input Data; Analytical Process; Tool's Output; and Application of the Results of the Analysis.The tool enables the first element through a Web-based application that can be accessed by distributed teams to store and retrieve any type of digital investigation material in a secure environment. The second is accomplished by making the relationships between information explicit through the use of a semantic network-a structure that literally allows an investigator or team to "connect -the-dots." The third element, the significance of the correlated information, is established through causality and consistency tests using a number of different methods embedded within the tool, including fault trees, event sequences, and other accident models. And finally, the evidence gathered and structured within the tool can be directly, electronically archived to preserve the evidence and investigative reasoning.

Panontin, Tina; Carvalho, Robert; Keller, Richard

2004-01-01

91

Interactive Investigator  

NSDL National Science Digital Library

Interactive Investigator, available through Virtual Museum Canada, is a website "for anyone with an interest in the different scientific methods used to solve crimes." Users will find a database of forensic science, containing short but informative essays on forensic entomology, toxicology, alcohol analysis, and various other forensic science topics. A simple timeline reviews key dates in the development of forensics, starting with the creation of the Paris Institute for Forensic Science in 1868. But the main feature (and the most fun) is an interactive game, in which players collect and analyze crime scene clues to solve a murder case. Interactive Investigator is also available in French.

92

Rollercoaster Investigations  

NSDL National Science Digital Library

This activity will allow students to explore the motion and speed of an object. While constructing a rollercoaster and using the Scientific Method, students will create their own question and then investigate it, finding out whether the speed of an object is affected by the track it follows.

Holly Mentillo

2012-09-01

93

Laboratory investigations  

SciTech Connect

The primary objectives were to examine the site-specific physical, chemical, and biological factors that impact construction, durability and performance of the proposed 5-MW (sub e) solar pond system at the Salton Sea. The interactions of the water, salt, and soil of the site and on material compatibility were examined. Potential interactions of the water/brine and soil are particularly important because the pond will utilize the naturally occurring clays as a bottom seal. Although there is a considerable and growing solar pond literature, little written information deals with the important site-specific investigations of water, salt, and soil. Therefore, technical effort was directed toward identifying the factors that should be investigated and determining methods of investigation. As a result, a by-product was the development of an approach for site-specific investigations and some specific methodologies. This development should continue in order to establish a generic approach for evaluating the suitability of any site for the construction of large-scale solar ponds.

Not Available

1984-09-01

94

Soil Investigations  

NSDL National Science Digital Library

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.

Integrated Teaching And Learning Program

95

Sunblock Investigation  

NSDL National Science Digital Library

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.

Company, The J.

2008-01-01

96

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.

97

Investigating Invasives  

NSDL National Science Digital Library

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).

Mary Lightbody

2008-11-01

98

Investigating Atheism  

NSDL National Science Digital Library

With their website, Investigating Atheism, the University of Cambridge hopes to add some clarity to the subject. Despite the attention recent books on atheism have received, they have had a mixed reception from the religious communities and from fellow atheists and agnostics. The goal of the site is to "set these contemporary "God Wars" in their historical context, and to offer a range of perspectives (from all sides) on the chief issues raised by the new atheists." A good place to start exploring this very well organized website is by looking in the Selected Features box on the right side of the homepage. There, a visitor can get an overview of the issues and the players, by clicking on "Current Controversies", "Atheist Politics", "Atheism and Meaning", "Arguments for Disbelief", and "Links". The "Links" section is divided up between Atheistic/Humanistic and Responses to the Debate. Visitors will find that studying atheism can be more complicated than it seems. The "History" tab points out the difficulty in recounting the history of atheism, because there is disagreement over its beginnings and players. Click on "Demographics" on the left side of the page to read about the obstacles faced when trying to get an accurate count of the number of atheists in the world today. Imperfect data is available, however, and such data suggests between 500 million and 750 million people don't believe in God.

99

A multi-level buck converter based rectifier with sinusoidal inputs and unity power factor for medium voltage (4160-7200 V) applications  

Microsoft Academic Search

A novel rectifier topology for high power (0.5 to 10 MVA) current source based AC motor drives is proposed. This rectifier is composed of a multi-winding transformer, a multilevel diode rectifier and a multi-level buck converter. The rectifier produces near unity input power factor and sinusoidal input current under any operating conditions. In addition, the proposed rectifier has a few

M. L. Zhang; B. Wu; Y. Xiao; F. Dewinter; R. Sotudeh

1999-01-01

100

A multilevel buck converter based rectifier with sinusoidal inputs and unity power factor for medium voltage (4160-7200 V) applications  

Microsoft Academic Search

A novel rectifier topology for high power (0.5 to 10 MVA) current source based AC motor drives is proposed. This rectifier is composed of a multi-winding transformer, a multi-level diode rectifier and a modified multi-level buck converter. The rectifier produces near unity input power factor and sinusoidal input current under any operating conditions. In addition, the proposed rectifier features reliable

Michael Lan Zhang; Bin Wu; Yuan Xiao; F. A. Dewinter; R. Sotudeh

2002-01-01

101

Death Investigation Certificate  

E-print Network

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

Saldin, Dilano

102

Success with Investigations.  

ERIC Educational Resources Information Center

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)

Chin, Christine

2003-01-01

103

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.

104

Sea Anemone: Investigations.  

ERIC Educational Resources Information Center

Several investigations can be undertaken with live sea anemones. A sea anemone's feeding response, fighting power, color, and symbiotic relationships to other invertebrates (such as a marine hermit crab) can be investigated in the high school classroom. Background information and laboratory procedures are provided. (Author/JN)

Hunt, John D.

1982-01-01

105

Ancillary investigations in uveitis  

PubMed Central

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

Gupta, Vishali; Gupta, Amod

2013-01-01

106

Investigating Global Connections  

NSDL National Science Digital Library

In this online interactive, learners investigate changes in the environment at various locations across the United States. Investigations of an Alaskan coastal community, the Pika, coral reef habitat, the American goldfinch, glacier ice melt, and the pine beetle lead learners to discover that our climate is changing.

National Park Service

2012-07-24

107

Investigating the Watergate Scandal.  

ERIC Educational Resources Information Center

Summarizes the events leading up to and the investigation that followed the Watergate break-in. Presents a lesson plan using primary documents that allows students to explore the workings of congressional investigations, the key figures in the scandal, and the arguments of the different participants. Includes copies of the documents. (DSK)

Ritchie, Donald A.

1998-01-01

108

Crime Scene Investigation.  

ERIC Educational Resources Information Center

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…

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

109

Investigations in Martian Sedimentology  

NASA Technical Reports Server (NTRS)

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.

Moore, Jeffrey M.

1998-01-01

110

Exploring Earth Investigations  

NSDL National Science Digital Library

Exploring Earth Investigations are Internet-based activities that use animations, interactive graphics, and unique imagery to help students gather information about a particular Earth science theme, issue, or concept. Exploring Earth Investigations were created by Houghton-Mifflin/McDougal-Littell in collaboration with TERC.

2008-07-01

111

Floodplain Development Investigation  

NSDL National Science Digital Library

This investigation involves using spatial thinking and intermediate to advanced Geographic Information Systems (GIS) skills to investigate suburban sprawl in detail, looking at land use decisions made in a rapidly developing suburb west of St. Louis, Missouri. The investigation also helps students to consider the risk/reward tradeoffs made in deciding to build in a desirable location that also happens to be in a floodplain. This investigation introduces several new skills in data management, and makes use of ArcViewâ??s statistics functions as land use designations are compared inside and outside of the 100 year floodplain. An optional performance assessment task challenges students to investigate land use decisions before and after the flood of 1993 to analyze how decisions may change after a major natural disaster.

Coulter, Bob

112

Floodplain Development Investigation  

NSDL National Science Digital Library

This investigation involves using spatial thinking and intermediate to advanced Geographic Information Systems (GIS) skills to investigate suburban sprawl in detail, looking at land use decisions made in a rapidly developing suburb west of St. Louis, Missouri. The investigation also helps students to consider the risk/reward tradeoffs made in deciding to build in a desirable location that also happens to be in a floodplain. This investigation introduces several new skills in data management, and makes use of ArcView’s statistics functions as land use designations are compared inside and outside of the 100 year floodplain. An optional performance assessment task challenges students to investigate land use decisions before and after the flood of 1993 to analyze how decisions may change after a major natural disaster.

Bob Coulter

2007-01-01

113

Microgravity silicon zoning investigation  

NASA Technical Reports Server (NTRS)

The flow instabilities in floating zones of silicon were investigated and methods for investigation of these instabilities in microgravity were defined. Three principal tasks were involved: (1) characterization of the float zone in small diameter rods; (2) investigation of melt flow instabilities in circular melts in silicon disks; and (3) the development of a prototype of an apparatus that could be used in near term space experiments to investigate flow instabilities in a molten zone. It is shown that in a resistance heated zoner with 4 to 7 mm diameter silicon rods that the critical Marangoni number is about 1480 compared to a predicted value of 14 indicative that viable space experiments might be performed. The prototype float zone apparatus is built and specifications are prepared for a flight zoner should a decision be reached to proceed with a space flight experimental investigation.

Kern, E. L.; Gill, G. L., Jr.

1985-01-01

114

Tectonics Geospatial Investigations  

NSDL National Science Digital Library

Tectonics is a series of geospatial investigations designed to augment existing middle school Earth science curriculum. Students use Web GIS to investigate important tectonics concepts. The investigations include scientific practices, crosscutting concepts, and core ideas from the National Research Council (2012) Framework for K-12 Science Education. Students will explore six questions: 1. What geologic hazards exist near me? Which plate boundary is closest to me? 2. How do we recognize plate boundaries? 3. How does thermal energy move around the Earth? 4. What happens when plates diverge? 5. What happens when plates move sideways past each other? 6. What happens when plates collide?

115

Investigating Perception and Illusion  

NSDL National Science Digital Library

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

John Eichinger

2009-05-30

116

Introduction: Investigating Walls  

NSDL National Science Digital Library

This collection of educational activities and investigations provides ideas on how to teach art, history, geography, language arts, math, and science using the opportunities and examples provided by stone walls.

117

Student Investigations Using Chromatography  

ERIC Educational Resources Information Center

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)

Witters, Weldon L.; Bush, Kenneth

1970-01-01

118

Skylab EREP Investigations Summary  

NASA Technical Reports Server (NTRS)

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.

Pierson, W. J. (editor)

1978-01-01

119

Dendritic Growth Investigators  

NASA Technical Reports Server (NTRS)

Representatives of NASA materials science experiments supported the NASA exhibit at the Rernselaer Polytechnic Institute's Space Week activities, April 5 through 11, 1999. From left to right are: Angie Jackman, project manager at NASA's Marshall Space Flight Center for dendritic growth experiments; Dr. Martin Glicksman of Rennselaer Polytechnic Instutute, Troy, NY, principal investigator on the Isothermal Dendritic Growth Experiment (IDGE) that flew three times on the Space Shuttle; and Dr. Matthew Koss of College of the Holy Cross in Worcester, MA, a co-investigator on the IDGE and now principal investigator on the Transient Dendritic Solidification Experiment being developed for the International Space Station (ISS). The image at far left is a dendrite grown in Glicksman's IDGE tests aboard the Shuttle. Glicksman is also principal investigator for the Evolution of Local Microstructures: Spatial Instabilities of Coarsening Clusters.

2000-01-01

120

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.

121

Investigational Drug Steering Committee  

Cancer.gov

The Investigational Drug Steering Committee (IDSC) was established in 2005 to collaborate with the NCI in the design and prioritization of early phase drug development trials with agents for which CTEP holds an IND.

122

Resources for Investigators  

Cancer.gov

Resources for Investigators Biorepositories Information about accessing biospecimens collected from DCP-supported clinical trials and projects. Clinical Trials Prevention and detection trials sponsored by NCI. Statistical Software Other NCI Resources Back

123

Resources for Investigators  

Cancer.gov

Resources for Investigators NCI Links NIH Links Other Links Clinical Trials Management Resource Website NCI CTCAE v4.0 NCI Data and Safety Monitoring Requirements NCI Booklet: "Taking Part in Clinical Trials: Cancer Prevention Studies; What

124

Multiple Principal Investigators  

Cancer.gov

Below is information to learn about NIH definitions, policies, and awards available to apply for support using the Multiple Principal Investigator (PI) model that supports team science. Answers to FAQs are included.

125

Crime Scene Investigation  

NSDL National Science Digital Library

This video segment from IdahoPTV's D4K explores the tools and forensic science that crime scene investigators use to collect evidence to help solve crimes, and study animals, archaeology and paleontology.

Idaho PTV

2011-08-09

126

Investigating Neighborhood Wetlands  

NSDL National Science Digital Library

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.

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.

127

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).

128

Guest Investigator Puzzle  

NSDL National Science Digital Library

After a brief introduction to astronomy, stellar types and the Guest Investigator program for the Extreme Ultraviolet Explorer (EUVE) NASA satellite, students conduct a brief astrophysics lab. This lab consists of matching the EUVE spectra of various kinds of mystery stars with the spectra of known stars taken at Extreme Ultraviolet (EUV) and optical wavelengths to determine their type. Students will become familiar with various types of stars and how astronomers use their spectra to distinguish between them. They will also learn how research astronomers obtain spectra from stars using a NASA satellite through the Guest Investigator (GI) process.

129

Systems special investigation group  

NASA Technical Reports Server (NTRS)

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.

1991-01-01

130

Hypnosis in criminal investigation  

Microsoft Academic Search

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

William S. Kroger; Richard G. Douce

1979-01-01

131

Soil, An Environmental Investigation.  

ERIC Educational Resources Information Center

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…

National Wildlife Federation, Washington, DC.

132

A Microscale Exsolution Investigation  

E-print Network

A Microscale Exsolution Investigation Markus Buchgraber, Anthony R. Kovscek Department of Energy large volumes of brine to become saturated with dissolved CO2 at concentrations of 50 g/l or more. As CO 2000 3000 4000 5000 Solubility, g/l Depth, feet CO2 Solubility solubility,10,000 mg/l

Stanford University

133

Acid Rain Investigations.  

ERIC Educational Resources Information Center

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)

Hugo, John C.

1992-01-01

134

Seasonal Change Investigations  

ERIC Educational Resources Information Center

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…

Smith, Wendy

2009-01-01

135

Investigating Ocean Pollution.  

ERIC Educational Resources Information Center

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…

LeBeau, Sue

1998-01-01

136

Investigation of semiconductors  

NSDL National Science Digital Library

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.

Shenk, Lynne

137

Galileo radio science investigations  

Microsoft Academic Search

The radio science investigations planned for Galileo's 6-year flight to and 2-year orbit of Jupiter use as their instrument the dual-frequency radio system on the spacecraft operating in conjunction with various US and German tracking stations on Earth. The planned radio propagation experiments are based on measurements of absolute and differential propagation time delay, differential phase delay, Doppler shift, signal

H. T. Howard; V. R. Eshleman; D. P. Hinson; A. J. Kliore; G. F. Lindal; R. Woo; M. K. Bird; H. Volland; P. Edenhoffer; M. Paetzold; H. Porsche

1992-01-01

138

The Polar Insulation Investigation  

ERIC Educational Resources Information Center

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…

Urban-Rich, Juanita

2006-01-01

139

Charles Darwin's Botanical Investigations  

ERIC Educational Resources Information Center

Charles Darwin's botanical studies provide a way to expose students to his work that followed the publication of "On the Origin of Species." We can use stories from his plant investigations to illustrate key concepts in the life sciences and model how questions are asked and answered in science.

Harley, Suzanne M.

2010-01-01

140

Investigating Children's Mathematics Readiness  

ERIC Educational Resources Information Center

A sample of 244 children (average age: 61 months) and their parents from the Dallas and Fort Worth (DFW) metroplex area in Texas were surveyed to investigate children's mathematics readiness. This study was conducted as part of a project funded by a local child care council, composed of business, civic, and education leaders in the community. The…

Lee, Joohi; Autry, Mary Murray; Fox, Jill; Williams, Cynthia

2008-01-01

141

Investigating Mendelian Genetics  

NSDL National Science Digital Library

The genetics investigations in this 15-page booklet were designed for students to develop understanding of the following biological concepts and skills:- MendelÂs law of segregation and law of independent assortment- Inheritance of 2 traits- How genotypes influence phenotypes- Scientific inquiry, including interpretation of evidence

Program, The W.

142

Investigating Your Environment.  

ERIC Educational Resources Information Center

The goal of this interdisciplinary curriculum is to enable students to make informed and responsible decisions about natural resources management by promoting an understanding of natural, social, and economic environments and the student's role in affecting all three. The included investigations utilize processes and techniques that help people…

Forest Service (USDA), Washington, DC.

143

Biosurveillance in outbreak investigations.  

PubMed

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

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

2013-03-01

144

Ice Core Investigations  

ERIC Educational Resources Information Center

What can glaciers tell us about volcanoes and atmospheric conditions? How does this information relate to our understanding of climate change? Ice Core Investigations is an original and innovative activity that explores these types of questions. It brings together popular science issues such as research, climate change, ice core drilling, and air…

Krim, Jessica; Brody, Michael

2008-01-01

145

Introduction to Biological Investigations  

NSDL National Science Digital Library

Introduction to Biological Investigations is a course that was developed to introduce the scientific method through practical application. This active, student-centered experience fosters fundamental skills that promote creativity, critical thinking, and scientific communication. The course has been well received by first-year students, and assessment results have been highly positive.

Fitzpatrick, Kathleen A.; Foote, Linda C.

2004-11-01

146

An Investigation of Synesthesia  

Microsoft Academic Search

This study was designed to investigate relations between synesthesia (the occurrence of imagery in one sense modality in response to sensations in another) and intellectual and personality functioning. Female (N = 204) and male (N = 170) subjects completed a visual-auditory synesthesia battery, paper-and-pencil synesthesia tests, the Multidimensional Personality Questionnaire (MPQ), and a brief intelligence test. The findings indicate generalized

Charles M. Rader; Auke Tellegen

1987-01-01

147

Investigating the Line  

NSDL National Science Digital Library

In the related activity called "Colors Collide or Combine," learners are intrigued by the apparent "line" that forms where colors from M&M coatings meet but do not mix. In this activity, learners investigate whether this non-mixing property is unique to M&M's and find that it happens whenever similar liquids come together.

Kessler, James H.; Galvan, Patricia M.

2007-01-01

148

Investigating Chromatography: selecting variables  

NSDL National Science Digital Library

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.

Nancy Gerber

149

Investigation of photosensitive disorders.  

PubMed

Investigation of photodermatosis is based primarily on the history and clinical findings, histological, immunological and biochemical findings are variably helpful depending on the clinical picture. Formal testing for photosensitivity may be the only definitive test proving photosensitivity on occasion. This article delineates the important features which allow classification of patients which then enables appropriate treatment. PMID:15533238

Murphy, Gillian M

2004-12-01

150

Physics in Carnacki's investigations  

Microsoft Academic Search

In the stories of Carnacki, created by the English writer William H. Hodgson and written between 1910 and 1912, we find an interesting mixture of science and fantasy. In spite of the fact that Carnacki is a ghost finder, who investigates in an environment where supernatural is acting, we see the character using technology and sometimes discussing of physics phenomena

Amelia Sparavigna

2007-01-01

151

Telescope Spacer Design Investigations  

NASA Technical Reports Server (NTRS)

Space-based interferometric gravitational wave observatories will measure changes in the distance between free falling proof masses inside widely separated spacecraft with pm sensitivity. These observatories will use fast telescopes to exchange laser beams. These telescopes are part of the probed optical distances and any length change in the gravitational wave band between secondary and primary can limit the sensitivity of the observatories. Furthermore, the large distance between and space constrains on the spacecraft require to use very fast telescopes with f-numbers approaching unity. These telescopes are very sensitive against any absolute length change which would reduce interferometer visibility and, ultimately, sensitivity. Our group has assembled a Silicon Carbide test structure and investigated its dimensional in the 1 OA-4 to 1 Hz frequency band at different operating temperatures. We also measured the overall length change and started investigating asymmetric length changes during cool down which would lead to misalignments in the telescope.

Livas, Jeffrey; Preston, Alix; Arsenovich, Petar

2011-01-01

152

Geophysical investigations in Jordan  

USGS Publications Warehouse

A number of geophysical investigations have been undertaken in the Hashemite Kingdom of Jordan to provide data for understanding the tectonic framework, the pattern of seismicity, earthquake hazards and geothermal resources of the country. Both the historical seismic record and the observed recent seismicity point to the dominance of the Dead Sea Rift as the main locus of seismic activity but significant branching trends and gaps in the seismicity pattern are also seen. A wide variety of focal plane solutions are observed emphasizing the complex pattern of fault activity in the vicinity of the rift zone. Geophysical investigations directed towards the geothermal assessment of the prominent thermal springs of Zerga Ma'in and Zara are not supportive of the presence of a crustal magmatic source. ?? 1990.

Kovach, R.L.; Andreasen, G.E.; Gettings, M.E.; El-Kaysi, K.

1990-01-01

153

Investigating an issue  

NSDL National Science Digital Library

This critical thinking guide introduces students to a three-stage process for investigating an issue. The three stages include discovering and defining, delving deep, and responding to the issue. A student tip sheet explains each stage and enables students to work through the processes in a step-by-step manner while seeing how the information is tied together. Students identify, explore, and critically summarize the information concerning their issue. A graphic organizer provides students with an opportunity to evaluate the issue they have researched. A brief outline of the three stages provides students with a handy summary for use while investigating an issue. The activity sheets are in pdf format and are provided as part of a site about the future of energy. Copyright 2005 Eisenhower National Clearinghouse

Project, Iowa P.

2004-01-01

154

OTV bearing deflection investigation  

NASA Technical Reports Server (NTRS)

The primary goal of the Bearing Deflectometer Investigation was to gain experience in the use of fiber optic displacement probe technology for bearing health monitoring in a liquid hydrogen turbo pump. The work specified in this Task Order was conducted in conjunction with Air Force Rocket Propulsion Laboratory Contract F04611-86-C-0010. APD conducted the analysis and design coordination to provide a displacement probe design compatible with the XLR-134 liquid hydrogen turbo pump assembly (TPA). Specifications and requirements of the bearing deflectometer were established working with Mechanical Technology Instruments, Inc. (MTI). The TPA design accommodated positioning of the probe to measure outer race cyclic deflections of the pump inlet bearing. The fiber optic sensor was installed as required in the TPA and sensor output was recorded during the TPA testing. Data review indicated that no bearing deflection signature could be differentiated from the inherent system noise. Alternate sensor installations were not investigated, but might yield different results.

Reimer, B. L.; Diepenbrock, R. T.; Millis, M. G.

1993-01-01

155

The gravimetric geodesy investigation  

NASA Technical Reports Server (NTRS)

The Gravimetric Geodesy Investigation which will utilize altimeter and satellite-to-satellite tracking data from GEOS-C, ATS-F, and other spacecraft as appropriate to improve our knowledge of the earth's gravitational field is discussed. This investigation is interrelated with the study of oceanographic phenomena such as those associated with tides and currents, hence the latter are considered together with gravitational effects in the analysis of the data. The oceanographic effects, each of the order of a meter or two in amplitude and with still smaller uncertainties does not seriously hamper the altimeter gravimetric studies at the five meter level. Laser and satellite-to-satellite tracking data, when combined with the altimeter results, should provide the basis for such studies over wide areas of the ocean surface. Laser and conventional geodetic tracking data from ISAGEX and succeeding campaigns will provide a valuable framework for these analyses.

Siry, J. W.

1971-01-01

156

Rocket Motor Microphone Investigation  

NASA Technical Reports Server (NTRS)

At ATK's facility in Utah, large full-scale solid rocket motors are tested. The largest is a five-segment version of the reusable solid rocket motor, which is for use on the Ares I launch vehicle. As a continuous improvement project, ATK and BYU investigated the use of microphones on these static tests, the vibration and temperature to which the instruments are subjected, and in particular the use of vent tubes and the effects these vents have at low frequencies.

Pilkey, Debbie; Herrera, Eric; Gee, Kent L.; Giraud, Jerom H.; Young, Devin J.

2010-01-01

157

Tree Growth Investigation  

NSDL National Science Digital Library

This activity (located on page 3 of the PDF) is a full inquiry investigation into tree growth rates. Groups of learners will count tree rings to determine each tree’s age. A thorough sample of other measurements will then be taken to calculate the trees’ fastest, slowest, and overall average growth rate. Presenting the results in a table allows learners to compare data for different types of trees. Relates to linked video, DragonflyTV GPS: Temperate Rainforest.

Twin Cities Public Television, Inc.

2007-01-01

158

Investigating With Charles Darwin  

NSDL National Science Digital Library

Naturalist Charles Darwin made observations, conducted experiments, and kept detailed notebooks of his findings throughout his life. He was regularly transfixed by his observations of the natural world, whether in his early collecting days, during his legendary voyage on the Beagle , or on his daily walks in later life through the British countryside. This article offers two scientific investigations to deepen students' understandings of not only how science operates, but how Darwin in particular, approached analysis of the natural world.

Eichinger, John

2008-10-01

159

Colored Shadows Investigation  

NSDL National Science Digital Library

This activity (located on page 3 of the PDF) is a full inquiry investigation into mixing colors with light. Groups of learners will set up colored lights in a darkened room and record the color of shadows cast by each color. They will continue to collect data as they experiment with combinations of multiple colored lights and produce a data table to organize their findings. Relates to linked video, DragonflyTV GPS: Light and Color.

Twin Cities Public Television, Inc.

2006-01-01

160

Investigating Magnetic Force Fields  

NSDL National Science Digital Library

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.

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

2012-03-18

161

Investigating Local Ecosystems  

NSDL National Science Digital Library

The purpose of this Science NetLinks lesson is to guide students through investigations of the habitats of local plants and animals; to explore some of the ways animals depend on plants and each other. In order to learn about living environments, young children should begin with direct observation of their immediate surroundings, such as a backyard, schoolyard or local pond. As students observe their environment, they should have many opportunities to record and communicate their findings using words and pictures.

Science Netlinks;

2000-12-06

162

Free compressible jet investigation  

NASA Astrophysics Data System (ADS)

The nozzle pressure ratio (NPR) effect on a supersonic turbulent jet was investigated. A dedicated convergent/divergent nozzle together with a flow feeding system was designed and manufactured. A nozzle Mach exit of M j = 1.5 was selected in order to obtain a convective Mach number of M c = 0.6. The flow was investigated for over-expanded, correctly expanded and under-expanded jet conditions. Mach number, total temperature and flow velocity measurements were carried out in order to characterise the jet behaviour. The inlet conditions of the jet flow were monitored in order to calculate the nozzle exit speed of sound and evaluate the mean Mach number distribution starting from the flow velocity data. A detailed analysis of the Mach results obtained by a static Pitot probe and by a particle image velocimetry measurement system was carried out. The mean flow velocity was investigated, and the axial Mach decay and the spreading rate were associated with the flow structures and with the compressibility effects. Aerodynamics of the different jet conditions was evaluated, and the shock cells structures were detected and discussed correlating the jet structure to the flow fluctuation and local turbulence. The longitudinal and radial distribution of the total temperature was investigated, and the temperature profiles were analysed and discussed. The total temperature behaviour was correlated to the turbulent phenomena and to the NPR jet conditions. Self-similarity condition was encountered and discussed for the over-expanded jet. Compressibility effects on the local turbulence, on the turbulent kinetic energy and on the Reynolds tensor were discussed.

De Gregorio, Fabrizio

2014-03-01

163

STS investigators' guide  

NASA Technical Reports Server (NTRS)

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.

1989-01-01

164

Investigational Approaches for Mesothelioma  

PubMed Central

Malignant pleural mesothelioma (MPM) is a rare, aggressive tumor with a poor prognosis. In view of the poor survival benefit from first-line chemotherapy and the lack of subsequent effective treatment options, there is a strong need for the development of more effective treatment approaches for patients with MPM. This review will provide a comprehensive state of the art of new investigational approaches for mesothelioma. In an introductory section, the etiology, epidemiology, natural history, and standard of care treatment for MPM will be discussed. This review provide an update of the major clinical trials that impact mesothelioma treatment, discuss the impact of novel therapeutics, and provide perspective on where the clinical research in mesothelioma is moving. The evidence was collected by a systematic analysis of the literature (2000–2011) using the databases Medline (National Library of Medicine, USA), Embase (Elsevier, Netherlands), Cochrane Library (Great Britain), National Guideline Clearinghouse (USA), HTA Database (International Network of Agencies for Health Technology Assessment – INAHTA), NIH database (USA), International Pleural Mesothelioma Program – WHOLIS (WHO Database), with the following keywords and filters: mesothelioma, guidelines, treatment, surgery, chemotherapy, radiotherapy, review, investigational, drugs. Currently different targeted therapies and biologicals are under investigation for MPM. It is important that the molecular biologic research should first focus on mesothelioma-specific pathways and biomarkers in order to have more effective treatment options for this disease. The use of array technology will be certainly an implicit gain in the identification of new potential prognostic or biomarkers or important pathways in the MPM pathogenesis. Probably a central mesothelioma virtual tissue bank may contribute to the ultimate goal to identify druggable targets and to develop personalized treatment for the MPM patients. PMID:22666659

Surmont, Veerle F.; van Thiel, Eric R. E.; Vermaelen, Karim; van Meerbeeck, Jan P.

2011-01-01

165

Investigating the Invisible  

NSDL National Science Digital Library

In this open inquiry activity introducing concepts of remote sensing, students will discuss and research different invisible phenomena. They will then test and verify the existence of selected invisible phenomena by using measurement or detection devices. Depending on the phenomena being investigated, some of the following supplies are suggested: thermometer, light meter, decibel meter, telescope, gas sensors, filters, anemometer, and/or radon testing kit. This activity is part of the Ground Truth Studies Teacher Handbook, which provides more than 20 activities to build student understanding of global change and remote sensing, and includes background chapters for teachers, glossary, and appendices.

166

Radar Investigations of Asteroids  

NASA Technical Reports Server (NTRS)

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.

Ostro, S. J.

1984-01-01

167

The Polar Insulation Investigation  

NSDL National Science Digital Library

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.

Juanita Urban-Rich

2006-10-01

168

Airplane Wing Investigation  

NSDL National Science Digital Library

This activity (located on page 3 of the PDF) is a full inquiry investigation into Bernoulli’s principle and airplane wings. Learners will design and build their own airplane wing models out of Styrofoam, record their mass, and then use a fan to measure the “weight” change when air flows over the wing. Results from testing other wing shapes and sizes are then measured to chart relationships between lift and wing size and shape. Relates to linked video, DragonflyTV GPS: Balloon Fiesta.

Twin Cities Public Television, Inc.

2007-01-01

169

Investigation of Distant Quasars  

NASA Astrophysics Data System (ADS)

To study physical and morphological characteristics of distant quasars we carry out radio-optical investigation of 30 quasars from the Cambridge 7C catalogue second area (0.097 square radians). All these objects have angular sizes less than 1 arcsec on 102 MHz images. Average values of absolute magnitudes and spectral indices have been calculated for them (M = -26.51 +/- 0.25, a = 0.66+/-0.25). It was shown that 60% of compact radio sources from the FIRST catalogue (1400 MHz) are candidates of distant quasars.

Hovhannisyan, Martik; Andreasyan, R.; Paronyan, G.; Abrahamyan, H.

2014-07-01

170

Apollo light flash investigations  

NASA Technical Reports Server (NTRS)

The visual phenomenon of light flashes resulting from high energy, heavy cosmic rays penetrating the command module structure and crewmembers' eyes is investigated. Light flash events observed during dedicated sessions on Apollo 15, 16, 17 are described along with a Monte Carlo simulation of the exposure of an astronaut to cosmic radiation during a mission. Results of the Apollo Light Flash Moving Emulsion Detector experiment developed for Apollo 16 and 17 to obtain a direct record of incident cosmic ray particles are correlated with crewmembers' reports of light flashes.

Osborne, W. Z.; Pinsky, L. S.; Bailey, J. V.

1975-01-01

171

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

2008-10-13

172

Bearing fatigue investigation 3  

NASA Technical Reports Server (NTRS)

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.

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

1982-01-01

173

Investigation of erectile dysfunction  

PubMed Central

Erectile dysfunction (ED) represents a common and debilitating condition with a wide range of organic and non-organic causes. Physical aetiologies can be divided into disorders affecting arterial inflow, the venous occlusion mechanism or the penile structure itself. Various imaging modalities can be utilised to investigate the physical causes of ED, but penile Doppler sonography (PDS) is the most informative technique, indicated in those patients with ED who do not respond to oral pharmacological agents (e.g. phosphodiesterase type 5 inhibitors). This review will examine the anatomical and physiological basis of penile erection, the method for performing PDS and features of specific causes of ED, and will also consider the alternative imaging modalities available. PMID:23118101

Patel, D V; Halls, J; Patel, U

2012-01-01

174

Vitamin D Investigation  

NASA Technical Reports Server (NTRS)

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.

1986-01-01

175

Aquifier stability investigation  

NASA Astrophysics Data System (ADS)

The reservoir Stability Studies Program had four major activities: a state-of-the-art survey to establish preliminary stability criteria and identify areas requiring research and development; numerical modeling; laboratory testing to provide data for use in numerical models and to investigate fundamental rock mechanics, thermal, fluid, and geochemical response of aquifer materials; and field studies to verify the feasibility of air injection and recovery under CAES conditions in an aquifer, to validate and refine the stability criteria, and to evaluate the accuracy and adequacy of the numerical and experimental methodologies developed in previous work. Three phases of study, including preliminary criteria formulation, numerical model development, and experimental assessment of CAES reservoir materials have been completed. Present activity consists of construction and operation of the aquifer field test, and associated numerical and experimental work in support of that activity.

Allen, R. D.; Doherty, T. J.

1981-09-01

176

Investigations of lunar materials  

NASA Technical Reports Server (NTRS)

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.

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

1972-01-01

177

Investigations of bipolar magnetotransistor  

NASA Astrophysics Data System (ADS)

(BMT) with well. Investigation by the modem two-dimensional TCAD of the volume SRH-recombination are studied of the lateral bipolar magnetotransistor with the diffusion well for the physicists of working and high sensitivity designs. Magnetic field effect create volume concentration-recombination mechanism of the current negative sensitivity. For raising sensitivity is conduct study of series lateral bipolar magnetotransistor with base in well. Joining the contacts of base and well creates a threshold of operating, negative magnetosensitivity, growing of sensitivity in weak magnetic field. Transistor can serve the generator electron-hole plasma. Device has volumetric generation-recombination mechanism of sensitivity, new principle of getting maximum relative sensitivity on the current 2000 1/T in the magnetic field of the Earth.

Tikhonov, R. D.

2006-05-01

178

Soldering In Space Investigation  

NASA Technical Reports Server (NTRS)

This video captures Mike Fincke melting solder during the first set of planned In-Space Soldering Investigation (ISSI) experiments onboard the International Space Station (ISS). In the video, Fincke touches the tip of the soldering iron to a wire wrapped with rosin-core solder.Review of the experiment video revealed melting kinetics, wetting characteristics, and equilibrium shape attainment of the solder charge. The main photograph shows the results of feeding solder wire onto a heated surface. Here the solder is still attached with the spool seen floating in the foreground of the image. The inset photograph at right, shows a set of three simple melting experiments in which the solder, not affected by gravity, achieved an unexpected equilibrium football shape on the wire. Samples returned to Earth were examined for porosity and flux distribution as well as micro structural development. ISSI's purpose was to find out how solder behaves in a weightless environment and promote our knowledge of fabrication and repair techniques that might be employed during extended space exploration missions.

2004-01-01

179

Soldering In Space Investigation  

NASA Technical Reports Server (NTRS)

This video captures Mike Fincke melting solder during the first set of planned In-Space Soldering Investigation (ISSI) experiments onboard the International Space Station (ISS). In the video, Fincke touches the tip of the soldering iron to a wire wrapped with rosin-core solder. Review of the experiment video revealed melting kinetics, wetting characteristics, and equilibrium shape attainment of the solder charge. The main photograph shows the results of feeding solder wire onto a heated surface. Here the solder is still attached with the spool seen floating in the foreground of the image. The inset photograph at right, shows a set of three simple melting experiments in which the solder, not affected by gravity, achieved an unexpected equilibrium football shape on the wire. Samples returned to Earth were examined for porosity and flux distribution as well as micro structural development. ISSI's purpose was to find out how solder behaves in a weightless environment and promote our knowledge of fabrication and repair techniques that might be employed during extended space exploration missions.

2004-01-01

180

Ship Creek bioassessment investigations  

SciTech Connect

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.

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

1995-06-01

181

The Dawn Topography Investigation  

NASA Technical Reports Server (NTRS)

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.

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

182

Sabatier Catalyst Poisoning Investigation  

NASA Technical Reports Server (NTRS)

The Carbon Dioxide Reduction Assembly (CRA) on the International Space Station (ISS) has been operational since 2010. The CRA uses a Sabatier reactor to produce water and methane by reaction of the metabolic CO2 scrubbed from the cabin air and the hydrogen byproduct from the water electrolysis system used for metabolic oxygen generation. Incorporating the CRA into the overall air revitalization system has facilitated life support system loop closure on the ISS reducing resupply logistics and thereby enhancing longer term missions. The CRA utilizes CO2 which has been adsorbed in a 5A molecular sieve within the Carbon Dioxide Removal Assembly, CDRA. There is a potential of compounds with molecular dimensions similar to, or less than CO2 to also be adsorbed. In this fashion trace contaminants may be concentrated within the CDRA and subsequently desorbed with the CO2 to the CRA. Currently, there is no provision to remove contaminants prior to entering the Sabatier catalyst bed. The risk associated with this is potential catalyst degradation due to trace organic contaminants in the CRA carbon dioxide feed acting as catalyst poisons. To better understand this risk, United Technologies Aerospace System (UTAS) has teamed with MSFC to investigate the impact of various trace contaminants on the CRA catalyst performance at relative ISS cabin air concentrations and at about 200/400 times of ISS concentrations, representative of the potential concentrating effect of the CDRA molecular sieve. This paper summarizes our initial assessment results.

Nallette, Tim; Perry, Jay; Abney, Morgan; Knox, Jim; Goldblatt, Loel

2013-01-01

183

Kapton HN investigations  

SciTech Connect

Kapton HN properties and the properties of the slip additive calcium phosphate dibasic (CaHPO{sub 4}) were investigated. Impurity analyses were performed on the compound by inductively coupled plasma (ICP) and ion chromatography (IC). Other analyses on the slip additive included: processing solution -- dissolution analysis, high-explosive compatibility studies, scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and particle size distribution. Testing and analyses were also performed on Kapton HN film and other polyimide films that could serve as possible replacements for Kapton HN. The polyimide films that were tested are: Upilex-R, Upilex-S, Upilex-SGA, and Apical. The analyses performed were: infrared (IR), x-ray photoelectron spectroscopy (XPS), SEM/EDS, high-potential breakdown testing, (PVD) physical vapor deposition adhesion tests, and peel tests. Upilex-S flyer cables were also fabricated and successfully test fired. In addition to these raw material tests, production cables were chemically treated and destructively (high potential) tested. A long-term aging environment for production cables was also selected, and aging tests were begun. 9 figs., 7 tabs.

Williams, M.K.; Huelskamp, M.A.; Armstrong, K.P.; Brandon, J.L.; Lavoie, J.M. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)); Smith, A.E. (Sandia National Labs., Albuquerque, NM (USA))

1990-09-28

184

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

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.

None

2012-01-25

185

Nevada nuclear waste storage investigations  

NASA Astrophysics Data System (ADS)

Tasks performed to improve the technology of nuclear waste storage and disposal and to determine whether underground rock media at NTS are acceptable for a high level nuclear waste repository are described. These include: weapons test seismic investigations, geologic and hydrologic investigations, media investigations, engineering and technical support, quality assurance, technical overview, Climax spent fuel test, National Waste Terminal Storage program support, rock mechanics investigations, and radionuclide migration investigations.

1980-12-01

186

Cassini Plasma Spectrometer Investigation  

NASA Astrophysics Data System (ADS)

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 Saturn’s magnetosphere and its complex interactions with Titan, the icy satellites and rings, Saturn’s ionosphere and aurora, and the solar wind. Our design approach meets these goals by emphasizing two complementary types of measurements: high-time resolution velocity distributions of electrons and all major ion species; and lower-time resolution, high-mass resolution spectra of all ion species. The CAPS instrument is made up of three sensors: the Electron Spectrometer (ELS), the Ion Beam Spectrometer (IBS), and the Ion Mass Spectrometer (IMS). The ELS measures the velocity distribution of electrons from 0.6 eV to 28,250 keV, a range that permits coverage of thermal electrons found at Titan and near the ring plane as well as more energetic trapped electrons and auroral particles. The IBS measures ion velocity distributions with very high angular and energy resolution from 1 eV to 49,800 keV. It is specially designed to measure sharply defined ion beams expected in the solar wind at 9.5 AU, highly directional rammed ion fluxes encountered in Titan’s ionosphere, and anticipated field-aligned auroral fluxes. The IMS is designed to measure the composition of hot, diffuse magnetospheric plasmas and low-concentration ion species 1 eV to 50,280 eV with an atomic resolution M/?M ˜70 and, for certain molecules, (such asN 2 + and CO+), effective resolution as high as ˜2500. The three sensors are mounted on a motor-driven actuator that rotates the entire instrument over approximately one-half of the sky every 3 min.

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

2004-09-01

187

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

ERIC Educational Resources Information Center

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;…

Renner, John W.; And Others

188

3, 677703, 2003 Investigation of  

E-print Network

ACPD 3, 677­703, 2003 Investigation of airborne foot-and-mouth disease virus transmission T and Physics Discussions Investigation of airborne foot-and-mouth disease virus transmission during low.mikkelsen@risoe.dk) 677 #12;ACPD 3, 677­703, 2003 Investigation of airborne foot-and-mouth disease virus transmission T

Paris-Sud XI, Université de

189

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

190

Artificial Selection Lab, Investigation #1  

NSDL National Science Digital Library

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).

AP Biology Investigative Labs: An Inquiry-Based Approach

191

FOSS Variables FOSS Lifeboat Investigation: Developing Investigable Question, Investigation (Experimentation), and Communicating Results  

NSDL National Science Digital Library

This activity is an extension of the FOSS Variables Lifeboat investigation. Students choose a lifeboats variable to investigate, write up an experiment based on the variable to be tested, test the variable, and create a lifeboats investigation poster to share their results.

Walvatne, Amy

192

Physics. Student Investigations and Readings. Investigations in Natural Science.  

ERIC Educational Resources Information Center

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 36 physics investigations which focus on concepts related to: movement; vectors; falling objects; force and acceleration; a…

Renner, John W.; And Others

193

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

194

Accident/Mishap Investigation System  

NASA Technical Reports Server (NTRS)

InvestigationOrganizer (IO) is a Web-based collaborative information system that integrates the generic functionality of a database, a document repository, a semantic hypermedia browser, and a rule-based inference system with specialized modeling and visualization functionality to support accident/mishap investigation teams. This accessible, online structure is designed to support investigators by allowing them to make explicit, shared, and meaningful links among evidence, causal models, findings, and recommendations.

Keller, Richard; Wolfe, Shawn; Gawdiak, Yuri; Carvalho, Robert; Panontin, Tina; Williams, James; Sturken, Ian

2007-01-01

195

24 CFR 146.37 - Investigation.  

Code of Federal Regulations, 2012 CFR

... 2012-04-01 false Investigation. 146.37 Section 146...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Settlement, and Enforcement Procedures § 146.37 Investigation. (a) Investigation...

2012-04-01

196

24 CFR 146.37 - Investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 false Investigation. 146.37 Section 146...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Settlement, and Enforcement Procedures § 146.37 Investigation. (a) Investigation...

2011-04-01

197

24 CFR 146.37 - Investigation.  

Code of Federal Regulations, 2014 CFR

... 2014-04-01 false Investigation. 146.37 Section 146...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Settlement, and Enforcement Procedures § 146.37 Investigation. (a) Investigation...

2014-04-01

198

24 CFR 146.37 - Investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Investigation. 146.37 Section 146...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Settlement, and Enforcement Procedures § 146.37 Investigation. (a) Investigation...

2010-04-01

199

24 CFR 146.37 - Investigation.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 false Investigation. 146.37 Section 146...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Settlement, and Enforcement Procedures § 146.37 Investigation. (a) Investigation...

2013-04-01

200

The NCI Outstanding Investigator Award  

Cancer.gov

NCI’s new Outstanding Investigator Award (OIA) encourages research with breakthrough potential. The OIA will support investigators with outstanding records of productivity in cancer research with up to $600,000 in direct costs per year for 7 years to provide funding stability. NCI anticipates making about 50 awards annually.

201

Enacting forensics in homicide investigations  

Microsoft Academic Search

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

Robin Williams; Jason Weetman

2012-01-01

202

Four Investigations of Animal Behavior.  

ERIC Educational Resources Information Center

Describes four techniques for investigating animal behavior in situations where it is relatively easy to obtain meaningful data. Presents investigations for attention responses and habituation of domestic animals to sound stimuli, interaction of lambs and ewes, behavior of lambs in a simple T-maze, and vigilance in birds at a feeder. (JRH)

Cheverton, John

1997-01-01

203

PRE-INVESTIGATION WATER ELECTROLYSIS  

E-print Network

efficient. However, hydrogen has to be extracted from water in order to avoid the pollution problemsPRE-INVESTIGATION OF WATER ELECTROLYSIS PSO-F&U 2006-1-6287 Draft 04-02-2008 #12;2 Foreword This report is the result of an investigation of water electrolysis for hydrogen production in the energy

204

Diving fatality investigations: recent changes.  

PubMed

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

Edmonds, Carl; Caruso, James

2014-06-01

205

Investigative Case - "Goodbye Honey Buckets"  

NSDL National Science Digital Library

Students will investigate arctic geology and hydrology as well as tundra ecology as they consider options for sewage treatment. Public safety, environmental impact, and issues of construction and engineering will be explored.

Developed by Lana McNeil, College of Rural Alaska, Nome for Lifelines Online. (http://bioquest.org/lifelines/index.html)

206

Accident investigation: keep asking "why?".  

PubMed

Finding the causes of an accident or operating problem and deciding what actions to take to prevent it happening again is rather like dismantling a set of Russian dolls (Fig. 1). Each time we ask "why?" (or a similar searching question) we find another cause besides the ones we have found already and another action (or set of actions) we can take to prevent similar accidents occurring again. Many investigators stop too soon. This occurred at Flixborough, at Bhopal and in the investigation of many lesser-known accidents. We are more likely to find the deeper causes and the more original actions if groups of people with wide interests and experience are able to take part in the investigations or discuss the investigation reports. We should never look at an accident report as "closing out" a problem. As we read it, we should ask ourselves, "what else could be done?" PMID:16162391

Kletz, Trevor A

2006-03-17

207

Investigating Kinetic and Potential Energy  

NSDL National Science Digital Library

Students use media resources and an in-class investigation to explore the types of energy within different types of systems. They also use the formulas for kinetic and potential energy to examine the path of a projectile.

WGBH Educational Foundation

2007-04-19

208

Fermilab: Data-based Investigations  

NSDL National Science Digital Library

This is a set of six student investigations developed to support core proficiencies via use of data available through national laboratories. Investigations appropriate for high school include: Searching for the Top Quark Mass, Investigating Special Relativity, Cosmic Ray e-Lab, and Search for Higgs. Investigations for both middle school and high school include: Sloan Sky Server Projects and Simply Prairie. All data is freely available for download, with explicit instructions provided in the teacher's guide. The package includes student activity pages and an online homepage for learners. A goal of the project is to promote the teaching of modern physics topics, using data analysis as the framework for study. Fermilab is a national science laboratory whose primary focus of research is high energy physics. It is the home of the Tevatron, the world's second-largest particle accelerator.

Laboratory, Fermi N.

2011-09-14

209

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

210

SURFACE SCIENCE INVESTIGATION OF CORROSION  

E-print Network

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

Petta, Jason

211

Investigation of Zerodur material processing  

NASA Technical Reports Server (NTRS)

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.

Johnson, R. Barry

1993-01-01

212

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.

213

An Investigation on Quadratic Equations.  

ERIC Educational Resources Information Center

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)

Hirst, Keith

1988-01-01

214

78 FR 64026 - Investigative Hearing  

Federal Register 2010, 2011, 2012, 2013, 2014

...2013, the National Transportation Safety Board (NTSB) will convene an investigative...of existing Federal passenger car safety standards emphasizing `forward...Metro-North's organizational safety culture. Parties to the hearing...

2013-10-25

215

COFS 1 Guest Investigator Program  

NASA Technical Reports Server (NTRS)

The process for selecting guest investigators for participation in the Control of Flexible Structures (COFS)-1 program is described. Contracts and grants will be awarded in late CY87. A straw-man list of types of experiments and a distribution of the experiments has been defined to initiate definition of an experiments package which supports development and validation of control structures interaction technology. A schedule of guest investigator participation has been developed.

Fontana, Anthony; Wright, Robert L.

1986-01-01

216

Hurricane Katrina Wind Investigation Report  

SciTech Connect

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

Desjarlais, A. O.

2007-08-15

217

Responsibility-Based Youth Programs Evaluation: Investigating the Investigations.  

ERIC Educational Resources Information Center

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…

Hellison, Don; Walsh, David

2002-01-01

218

SOFIA general investigator science program  

NASA Astrophysics Data System (ADS)

SOFIA is a joint project between NASA and DLR, the German Aerospace Center, to provide the worldwide astronomical community with an observatory that offers unique capabilities from visible to far-infrared wavelengths. SOFIA consists of a 2.7-m telescope mounted in a highly modified Boeing 747-SP aircraft, a suite of instruments, and the scientific and operational infrastructure to support the observing program. This paper describes the current status of the observatory and details the General Investigator program. The observatory has recently completed major development activities, and it has transitioned into full operational status. Under the General Investigator program, astronomers submit proposals that are peer reviewed for observation on the facility. We describe the results from the first two cycles of the General Investigator program. We also describe some of the new observational capabilities that will be available for Cycle 3, which will begin in 2015.

Young, Erick T.; Andersson, B.-G.; Becklin, Eric E.; Reach, William T.; Sankrit, Ravi; Zinnecker, Hans; Krabbe, Alfred

2014-07-01

219

100 Areas CERCLA ecological investigations  

SciTech Connect

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.

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

1993-09-01

220

Investigation of Transient Sublimator Performance  

NASA Technical Reports Server (NTRS)

Sublimators have been used for heat rejection in a variety of space applications including the Apollo Lunar Module and the Extravehicular Mobility Unit (EMU). Sublimators typically operate with steady-state feedwater utilization at or near 100%. However, sublimators are currently being considered to operate in a cyclical topping mode during low lunar orbit for Altair and possibly Orion, which represents a new mode of operation. This paper will investigate the feedwater utilization when a sublimator is used in this nontraditional manner. This paper includes testing efforts to date to investigate the Orbit-Averaged Feedwater Utilization (OAFU) for a sublimator.

Leimkuehler, Thomas O.; Sheth, Rubik; Stephan, Ryan A.

2009-01-01

221

Critical Viscosity of Xenon investigators  

NASA Technical Reports Server (NTRS)

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.

2001-01-01

222

Investigation of the Challenger Accident  

NASA Technical Reports Server (NTRS)

The work of the Presidential Commission on the Space Shuttle Challenger Accident (hereafter referred to as the Rogers Commission) and the work of the National Aeronautics and Space Administration in investigating the causes of the accident were reviewed. In addition to reviewing the five volumes of the Rogers Commission, the entire direct on-line Rogers Commission data base, which included full-text and document retrieval capability was also reviewed. The findings and recommendations contained also include materials submitted for the record, staff investigations, interviews, and trips.

1986-01-01

223

22 CFR 218.34 - Investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Investigation. 218.34 Section 218...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 218.34 Investigation. (a) Informal...

2010-04-01

224

22 CFR 143.34 - Investigation.  

Code of Federal Regulations, 2014 CFR

... 2014-04-01 false Investigation. 143.34 Section 143...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 143.34 Investigation. (a) Informal...

2014-04-01

225

22 CFR 218.34 - Investigation.  

Code of Federal Regulations, 2012 CFR

... 2012-04-01 false Investigation. 218.34 Section 218...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 218.34 Investigation. (a) Informal...

2012-04-01

226

22 CFR 143.34 - Investigation.  

Code of Federal Regulations, 2012 CFR

... 2012-04-01 false Investigation. 143.34 Section 143...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 143.34 Investigation. (a) Informal...

2012-04-01

227

34 CFR 110.33 - Investigation.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Investigation. 110.33 Section 110...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 110.33 Investigation. (a) Initial...

2012-07-01

228

14 CFR 1252.403 - Investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Investigation. 1252.403 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement...Procedures § 1252.403 Investigation. (a) Informal...

2010-01-01

229

34 CFR 110.33 - Investigation.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 false Investigation. 110.33 Section 110...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 110.33 Investigation. (a) Initial...

2014-07-01

230

22 CFR 143.34 - Investigation.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 false Investigation. 143.34 Section 143...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 143.34 Investigation. (a) Informal...

2013-04-01

231

34 CFR 110.33 - Investigation.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Investigation. 110.33 Section 110...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 110.33 Investigation. (a) Initial...

2013-07-01

232

22 CFR 218.34 - Investigation.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 false Investigation. 218.34 Section 218...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 218.34 Investigation. (a) Informal...

2013-04-01

233

14 CFR 1252.403 - Investigation.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 false Investigation. 1252.403 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement...Procedures § 1252.403 Investigation. (a) Informal...

2012-01-01

234

22 CFR 143.34 - Investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 false Investigation. 143.34 Section 143...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 143.34 Investigation. (a) Informal...

2011-04-01

235

14 CFR 1252.403 - Investigation.  

Code of Federal Regulations, 2014 CFR

... 2014-01-01 false Investigation. 1252.403 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement...Procedures § 1252.403 Investigation. (a) Informal...

2014-01-01

236

22 CFR 218.34 - Investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 false Investigation. 218.34 Section 218...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 218.34 Investigation. (a) Informal...

2011-04-01

237

34 CFR 110.33 - Investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Investigation. 110.33 Section 110...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 110.33 Investigation. (a) Initial...

2011-07-01

238

14 CFR 1252.403 - Investigation.  

Code of Federal Regulations, 2011 CFR

... 2010-01-01 true Investigation. 1252.403 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement...Procedures § 1252.403 Investigation. (a) Informal...

2011-01-01

239

14 CFR 1252.403 - Investigation.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 false Investigation. 1252.403 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement...Procedures § 1252.403 Investigation. (a) Informal...

2013-01-01

240

22 CFR 143.34 - Investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Investigation. 143.34 Section 143...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 143.34 Investigation. (a) Informal...

2010-04-01

241

22 CFR 218.34 - Investigation.  

Code of Federal Regulations, 2014 CFR

... 2014-04-01 false Investigation. 218.34 Section 218...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 218.34 Investigation. (a) Informal...

2014-04-01

242

34 CFR 110.33 - Investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Investigation. 110.33 Section 110...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 110.33 Investigation. (a) Initial...

2010-07-01

243

Why Are Mathematical Investigations Important?  

ERIC Educational Resources Information Center

"Research studies show that when students discover mathematical ideas and invent mathematical procedures, they have a stronger conceptual understanding of connections between mathematical ideas." Flewelling and Higginson state that inquiry, investigations, and problem solving "give students the opportunity to use their imagination and to get into…

Quinnell, Lorna

2010-01-01

244

Mars Observer magnetic fields investigation  

Microsoft Academic Search

The magnetic fields experiment designed for the Mars Observer mission will provide definitive measurements of the Martian magnetic field from the transition and mapping orbits planned for the Mars Observer. The paper describes the instruments (which include a classical magnetometer and an electron reflection magnetometer) and techniques designed to investigate the nature of the Martian magnetic field and the Mars-solar

J. E. P. Connerney; P. Wasilewski; R. P. Lin; K. A. Anderson; C. W. Carlson; J. McFadden; D. W. Curtis; H. Reme; A. Cros; J. L. Médale; J. A. Sauvaud; C. d'Uston; S. J. Bauer; P. Cloutier; Michael Mayhew; N. F. Ness

1992-01-01

245

Investigating Gender Differences in Reading  

ERIC Educational Resources Information Center

Girls consistently outperform boys on tests of reading comprehension, although the reason for this is not clear. In this review, differences between boys and girls in areas relating to reading will be investigated as possible explanations for consistent gender differences in reading attainment. The review will examine gender differences within the…

Logan, Sarah; Johnston, Rhona

2010-01-01

246

Neuropsychological investigation of amateur boxers  

Microsoft Academic Search

Amateur boxing is faced with criticism over the potential damage the sport inflicts on those who participate. The most sensitive measure of early neurological dysfunction is neuropsychological investigation. Ten studies employing such assessments on 289 amateur boxers are reviewed. The forms of analysis undertaken include controlled comparison with other sportsmen, of both active and former boxers, detailed pre- and post-bout

R J Butler

1994-01-01

247

Ionic Liquids from Theoretical Investigations  

NASA Astrophysics Data System (ADS)

Theoretical investigations of ionic liquids are reviewed. Three main cate-gories are discussed, i.e., static quantum chemical calculations (electronic structure methods), traditional molecular dynamics simulations and first-principles molecular dynamics simulations. Simple models are reviewed in brief.

Kirchner, Barbara

248

Investigating University-School Partnerships  

ERIC Educational Resources Information Center

Investigating University-School Partnerships: A Volume in Professional Development School Research, the fourth book in the PDS Research Series developed by the same editors, includes a collection of organized papers that represent the best and latest examples of practitioner thinking, research, and program design and evaluation in the field at the…

Nath, Janice, Ed.; Guadarrama, Irma N., Ed.; Ramsey, John, Ed.

2011-01-01

249

Radar investigation of masonry structures  

Microsoft Academic Search

For the investigation of the influence of structural features in masonry on the propagation of electromagnetic impulses emitted by radar, different physical models containing various brick materials were constructed. As structural defects, full and empty joints, layered structures and larger air voids were considered. Some of the simpler models were stored in a tank filled with distilled water or with

C Maierhofer; S Leipold

2001-01-01

250

Mobilising Ethnographers Investigating Technologised Learning  

ERIC Educational Resources Information Center

This paper intends to problematise understandings of the ethnographer's presence in investigating contemporary forms of technologised learning. The ubiquity of new educational technologies raises questions concerning the spaces of education and learning, and challenges, at the same time, the sense of "being there" in terms of the face-to-face…

Landri, Paolo

2013-01-01

251

Thematic mapper design parameter investigation  

NASA Technical Reports Server (NTRS)

Simulated multispectral data sets used in the Thematic Mapper design parameter investigation are analyzed. The sets were produced by processing high-resolution digital multispectral data through models of the various Thematic Mapper configurations and then through three resampling techniques as a simulation of ground processing. Emphasis is placed on classification processing and analysis of results.

Colby, C. P., Jr.; Wheeler, S. G.; Miller, W.

1978-01-01

252

Investigational Drug Steering Committee Roster  

Cancer.gov

Investigational Drug Steering Committee Roster Co-chairs Lillian Siu, M.D.Princess Margaret HospitalUniversity of TorontoToronto, Ontario Amit Oza, M.D.Princess Margaret HospitalUniversity of TorontoToronto, Ontario Members Carol Aghajanian, M.D.Memorial

253

Investigating the Electrolysis of Water  

NSDL National Science Digital Library

In this lab exercise, students will investigate the electrolysis of water, using an electrolyser and a fuel cell. Step by step directions are provided for this experiment, along with a graphical representation of the setup. This document may be downloaded in PDF file format.

2012-04-23

254

Corrosion Investigations at Maribo Sakskbing  

E-print Network

Corrosion Investigations at Maribo Sakskøbing Combined Heat and Power Plant Part IV Melanie Biede Vattenfall A/S Søren Aakjær Jensen/Ole Hede Larsen DONG Energy April 2007. #12;2 CORROSION.................................................................................................. 16 3.1. Measured corrosion attack

255

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.

256

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.

257

An Investigation of Document Partitions.  

ERIC Educational Resources Information Center

Empirical significance of document partitions is investigated as a function of index term-weight and similarity thresholds. Results show the same empirically preferred partitions can be detected by two independent strategies: an analysis of cluster-based retrieval analysis and an analysis of regularities in the underlying structure of the document…

Shaw, W. M., Jr.

1986-01-01

258

Defining Problems and Planning Investigations  

NSDL National Science Digital Library

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.

Dustin Cannarella

2011-10-01

259

Investigating Earthquakes through Regional Seismicity  

NSDL National Science Digital Library

In this module, sudents will use online interactive materials to investigate the nature of earthquakes. The module consists of three major sections, "What is an Earthquake?", "The Distribution of Earthquakes", and "Measuring Earthquakes". Each section presents online material for background and interactive learning activities which help them to understand such characteristics of earthquakes as their associated faults, rates of occurrence, magnitudes, and geographic distribution.

John Marquis

260

Offender profiling and investigative psychology  

Microsoft Academic Search

The origins of 'Offender Profiling' in the advice given by police medical advisors and other experts to criminal investigations are briefly outlined. The spread of such advice to police enquiries across the United States in the early 1970s, culminating in its uptake by Special Agents of the FBI in the mid-1970s and the widespread promotion of their ser- vices through

David Canter

2004-01-01

261

Campus Life and Government Investigations.  

ERIC Educational Resources Information Center

This paper discusses the proper way to conduct official government investigations on college campuses within the framework of the Fourth Amendment to the United States Constitution which protects against unreasonable searches and seizures. The article emphasizes that this amendment lays the groundwork for the limitations on the exercise of…

Shekleton, James F.

262

The WIND magnetic field investigation  

Microsoft Academic Search

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

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

263

The NEAR laser ranging investigation  

Microsoft Academic Search

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

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

1997-01-01

264

Investigations on Multiplication of Fractions.  

ERIC Educational Resources Information Center

Three different models with continuous materials, discontinuous materials, and number lines were used to study the operation concept in six investigations on multiplication with fractions with pupils aged 11-12 in a Penang International School. All approaches could be understood by pupils, but they preferred the area and fractional models. (MNS)

Sai, Khoo Phon; Inder, Walter R. D.

1984-01-01

265

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.

2012-10-11

266

19 CFR 204.2 - Investigations.  

Code of Federal Regulations, 2010 CFR

...Investigations. 204.2 Section 204.2 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION NONADJUDICATIVE INVESTIGATIONS INVESTIGATIONS OF EFFECTS OF IMPORTS ON AGRICULTURAL PROGRAMS § 204.2 Investigations....

2010-04-01

267

Scientific Investigation with the SJCSI  

NASA Astrophysics Data System (ADS)

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.

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

2012-04-01

268

Crop Science Investigation (CSI) Network  

NSDL National Science Digital Library

Crop Science Investigation (CSI) Network        This site is designed to serve as a clearinghouse of lesson plans and other materials useful for teaching 4-H and FFA youth about crop and soil sciences.  Check out this site for information to use in your classroom, workshops, or 4-H meetings.       As youth become less connected with agriculture, it is essential to teach them about agriculture. A series of workshops, called Crop Science Investigation or CSI was created to help spark the interest of youth to learn about crops and plants.Dig into some interesting facts about Nebraska crops.Learn how crops grow and factors that affect them.Learn about exciting career opportunities related to crop and plant science. The University of Nebraska offers great majors for anyone interested in anything plants!  Check it out!

269

Eosinophilic oesophagitis: investigations and management.  

PubMed

Eosinophilic oesophagitis (EO) is an immune/antigen mediated, chronic, relapsing disease characterised by dysphagia, food bolus impaction and a dense oesophageal eosinophilic infiltrate. Characteristic endoscopic features include corrugated rings, linear furrows and white exudates, but none are diagnostic. Despite its increasing prevalence, EO remains underdiagnosed. There is a strong association with other atopic conditions. Symptoms, histology and endoscopic findings can overlap with gastro-oesophageal reflux disease. Currently endoscopy and oesophageal biopsies are the investigation of choice. Oesophageal physiology studies, endoscopic ultrasound, impedance planimetry and serology may have a role in the diagnosis and monitoring of response to therapy. Acid reducing medication is advocated as first line or adjuvant therapy. Dietary therapy is comprised of elimination diets or can be guided by allergen assessment. In adults, topical corticosteroids are the mainstay of therapy. Endoscopic dilatation is safe and effective for the treatment of non-responsive strictures. Other therapeutic options (immunomodulators, biological agents, leukotriene receptor antagonists) are under investigation. PMID:24664254

Kumar, Mayur; Sweis, Rami; Wong, Terry

2014-05-01

270

Investigating e-Market Evolution  

Microsoft Academic Search

A market is in equilibrium if there is no opportunity for risk-free, or low-risk, profit. The majority of real markets are\\u000a not in equilibrium thus presenting the opportunity for novel forms of transactions to take advantage of such risk-free, or\\u000a low-risk, profits. The introduction of such novel forms of transaction is an instance of market evolution. A project is investigating

John K. Debenham

2002-01-01

271

Shuttle Fuel Feedliner Cracking Investigation  

NASA Technical Reports Server (NTRS)

This presentation provides an overview of material covered during 'Space Shuttle Fuel Feedliner Cracking Investigation MSFC Fluids Workshop' held November 19-21, 2002. Topics covered include: cracks on fuel feed lines of Orbiter space shuttles, fluid driven cracking analysis, liner structural modes, structural motion in a fluid, fluid borne drivers, three dimensional computational fluid dynamics models, fluid borne drivers from pumps, amplification mechanisms, flow parameter mapping, and flight engine flow map.

Nesman, Tomas E.; Turner, Jim (Technical Monitor)

2002-01-01

272

Cytological investigations on Bulgarian phanerogams  

Microsoft Academic Search

Baltisberger, M.: Cytological investigations on Bulgarian phanerogams. - Willdenowia 36 (Special Issue): 205-216. - ISSN 0511-9618; © 2006 BGBM Berlin-Dahlem. doi:10.3372\\/wi.36.36117 (available via http:\\/\\/dx.doi.org\\/) Chromosome numbers are given for 35 species of angiosperms from Bulgaria, nine of which are the first reports on Bulgarian material; for Geum bulgaricum a new ploidy level is reported. The karyo- types are presented for

MATTHIAS BALTISBERGER

2006-01-01

273

Investigating Natural Selection: Elementary School  

NSDL National Science Digital Library

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.

2010-01-01

274

Rosetta Radio Science Investigations (RSI)  

Microsoft Academic Search

The Rosetta spacecraft has been successfully launched on 2nd March 2004 to its new target comet 67 P\\/Churyumov-Gerasimenko.\\u000a The science objectives of the Rosetta Radio Science Investigations (RSI) experiment address fundamental aspects of cometary\\u000a physics such as the mass and bulk density of the nucleus, its gravity field, its interplanetary orbit perturbed by nongravitational\\u000a forces, its size and shape, its

Martin Pätzold; Bernd Häusler; Kaare Aksnes; John D. Anderson; Sami W. Asmar; Jean-Pierre Barriot; Michael K. Bird; Hermann Boehnhardt; Werner Eidel; Eberhardt Grün; Wing H. Ip; Essam Marouf; Trevor Morley; Fritz M. Neubauer; Hans Rickman; Nicolas Thomas; Bruce T. Tsurutani; Max K. Wallis; N. C. Wickramasinghe; Eirik Mysen; Oystein Olson; Stefan Remus; Silvia Tellmann; Thomas Andert; Ludmila Carone; Markus Fels; Christina Stanzel; Iris Audenrieth-Kersten; Alexander Gahr; Anna-Liane Müller; Dusan Stupar; Christina Walter

2007-01-01

275

Investigating leaking underground storage tanks  

E-print Network

an analysis of pertinent data, modified. ACKNOWLEDGEMENTS I thank those who assisted me during the field investigation portion of this research project: Tim Dale, Janice Smith-Bagheri, and Dave White (driller). Without their assistance and suggestions... LEAKING UNDERGROUND STORAGE TANK CASE STUDY Previous Work . Drilling, Sampling, and Well Construction Drilling Method and Equipment . Sampling Considerations . Sampling Methods Sampling Procedure Well Design and Construction Analysis of Data...

Upton, David Thompson

1989-01-01

276

Dynamic investigations of force transducers  

NASA Astrophysics Data System (ADS)

The dynamic calibration of force transducers based on the determination of inertia forces is described. The frequency dependency of the dynamic sensitivity for different types of transducers is investigated and discussed with a theoretical model. It was found that force transducers of high static quality can exhibit a completely different dynamic behavior. These differences are essentially due to influences from spring effects in the force introduction. The resonance behavior is analyzed to determine the stiffness and damping of the transducer.

Kumme, R.

277

Systems special investigation group overview  

NASA Technical Reports Server (NTRS)

The Systems Special Investigation Group (SIG) has undertaken investigations in the four major engineering disciplines represented by LDEF hardware: electrical, mechanical, thermal, and optical systems. Testing was planned for the highest possible level of assembly, and top level system tests for nearly all systems were performed at this time. Testing to date was performed on a mix of LDEF and individual experimenter systems. No electrical or mechanical system level failures attributed to the spaceflight environment were detected by the Systems SIG. Some low cost electrical components were used successfully, although relays were a continuing problem. Extensive mechanical galling was observed, but no evidence of coldwelding was identified. A working index of observed systems anomalies was created and will be used to support the tracking and resolution of these effects. LDEF hardware currently available to the Systems SIG includes most of the LDEF facility systems hardware, and some significant experimenter hardware as well. A series of work packages was developed for each of several subsystem types where further testing is of critical interest. The Systems SIG is distributing a regular newsletter to the greater LDEF community in order to maintain coherence in an investigation which is widely scattered both in subject matter and in geography. Circulation of this informal document has quadrupled in its first year.

Mason, James B.; Dursch, Harry; Edelman, Joel

1992-01-01

278

Investigation of musicality in birdsong.  

PubMed

Songbirds spend much of their time learning, producing, and listening to complex vocal sequences we call songs. Songs are learned via cultural transmission, and singing, usually by males, has a strong impact on the behavioral state of the listeners, often promoting affiliation, pair bonding, or aggression. What is it in the acoustic structure of birdsong that makes it such a potent stimulus? We suggest that birdsong potency might be driven by principles similar to those that make music so effective in inducing emotional responses in humans: a combination of rhythms and pitches-and the transitions between acoustic states-affecting emotions through creating expectations, anticipations, tension, tension release, or surprise. Here we propose a framework for investigating how birdsong, like human music, employs the above "musical" features to affect the emotions of avian listeners. First we analyze songs of thrush nightingales (Luscinia luscinia) by examining their trajectories in terms of transitions in rhythm and pitch. These transitions show gradual escalations and graceful modifications, which are comparable to some aspects of human musicality. We then explore the feasibility of stripping such putative musical features from the songs and testing how this might affect patterns of auditory responses, focusing on fMRI data in songbirds that demonstrate the feasibility of such approaches. Finally, we explore ideas for investigating whether musical features of birdsong activate avian brains and affect avian behavior in manners comparable to music's effects on humans. In conclusion, we suggest that birdsong research would benefit from current advances in music theory by attempting to identify structures that are designed to elicit listeners' emotions and then testing for such effects experimentally. Birdsong research that takes into account the striking complexity of song structure in light of its more immediate function - to affect behavioral state in listeners - could provide a useful animal model for studying basic principles of music neuroscience in a system that is very accessible for investigation, and where developmental auditory and social experience can be tightly controlled. PMID:24036130

Rothenberg, David; Roeske, Tina C; Voss, Henning U; Naguib, Marc; Tchernichovski, Ofer

2014-02-01

279

Investigation of musicality in birdsong  

PubMed Central

Songbirds spend much of their time learning, producing, and listening to complex vocal sequences we call songs. Songs are learned via cultural transmission, and singing, usually by males, has a strong impact on the behavioral state of the listeners, often promoting affiliation, pair bonding, or aggression. What is it in the acoustic structure of birdsong that makes it such a potent stimulus? We suggest that birdsong potency might be driven by principles similar to those that make music so effective in inducing emotional responses in humans: a combination of rhythms and pitches —and the transitions between acoustic states—affecting emotions through creating expectations, anticipations, tension, tension release, or surprise. Here we propose a framework for investigating how birdsong, like human music, employs the above “musical” features to affect the emotions of avian listeners. First we analyze songs of thrush nightingales (Luscinia luscinia) by examining their trajectories in terms of transitions in rhythm and pitch. These transitions show gradual escalations and graceful modifications, which are comparable to some aspects of human musicality. We then explore the feasibility of stripping such putative musical features from the songs and testing how this might affect patterns of auditory responses, focusing on fMRI data in songbirds that demonstrate the feasibility of such approaches. Finally, we explore ideas for investigating whether musical features of birdsong activate avian brains and affect avian behavior in manners comparable to music’s effects on humans. In conclusion, we suggest that birdsong research would benefit from current advances in music theory by attempting to identify structures that are designed to elicit listeners’ emotions and then testing for such effects experimentally. Birdsong research that takes into account the striking complexity of song structure in light of its more immediate function – to affect behavioral state in listeners – could provide a useful animal model for studying basic principles of music neuroscience in a system that is very accessible for investigation, and where developmental auditory and social experience can be tightly controlled. PMID:24036130

Rothenberg, David; Roeske, Tina C.; Voss, Henning U.; Naguib, Marc; Tchernichovski, Ofer

2013-01-01

280

Investigational drugs for eating disorders.  

PubMed

The eating disorders anorexia nervosa, bulimia nervosa and binge eating disorder are common, significant public health problems which are treated with nutritional, psychotherapeutic and pharmacological interventions. A number of drugs (mostly antidepressant drugs) are currently used in their treatment to some benefit, but there is substantial room for improvement. A wide variety of compounds are listed as under investigation for the treatment of eating disorders. They have a diverse variety of mechanisms of action, reflecting the complex nature of the control of food intake. While none of these compounds are close to release at present, the diversity of mechanisms under study lend some optimism that more effective approaches will be identified. PMID:12605570

Crow, Scott; Brown, Eric

2003-03-01

281

Probeware Tools for Science Investigations  

NSDL National Science Digital Library

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.

Park, John C.

2008-01-01

282

Investigating Community and Social Capital  

NSDL National Science Digital Library

Investigating Community and Social Capital introduces students to quantitative social science research with a case study on social capital. Some of the concepts illustrated include replication, unit of analysis, level of measurement, analysis over time versus cross-sectional analysis, crosstabulation, creating an index, and correlation. I hope that instructors find this to be an uncomplicated and useful enhancement to courses in disciplines such as political science, public administration and policy, and sociology. My larger goal is to introduce students to the merits and rewards of quantitative social science research and to demonstrate the power of this approach.

ICPSR

283

Experimental investigation of hypersonic aerodynamics  

NASA Technical Reports Server (NTRS)

An extensive series of ballistic range tests are currently being conducted at the Ames Research Center. These tests are intended to investigate the hypersonic aerodynamic characteristics of two basic configurations, which are: the blunt-cone Galileo probe which is scheduled to be launched in late 1989 and will enter the atmosphere of Jupiter in 1994, and a generic slender cone configuration to provide experimental aerodynamic data including good flow-field definition which computational aerodynamicists could use to validate their computer codes. Some of the results obtained thus far are presented and work for the near future is discussed.

Heinemann, K.; Intrieri, Peter F.

1987-01-01

284

Forensic Science: Hair Sample Investigation  

NSDL National Science Digital Library

This activity (on page 2 of the PDF) is a full inquiry investigation into how hairs from a crime scene are matched to suspects. Learners each take a single hair from their own head, then put it directly into the beam of a laser pointer. This projects the unique pattern of each hair onto a piece of paper to be traced, measured, identified and compared with the others. Learners can conclude this activity by setting up a mystery exercise with prepared samples of hair already in frames. Relates to linked video, DragonflyTV: Forensics.

Twin Cities Public Television, Inc.

2006-01-01

285

Overview of the Systems Special Investigation Group investigation  

NASA Technical Reports Server (NTRS)

The Long Duration Exposure Facility (LDEF) carried a remarkable variety of electrical, mechanical, thermal, and optical systems, subsystems, and components. Nineteen of the fifty-seven experiments flown on LDEF contained functional systems that were active on-orbit. Almost all of the other experiments possessed at least a few specific components of interest to the Systems Special Investigation Group (Systems SIG), such as adhesives, seals, fasteners, optical components, and thermal blankets. Almost all top level functional testing of the active LDEF and experiment systems has been completed. Failure analysis of both LDEF hardware and individual experiments that failed to perform as designed has also been completed. Testing of system components and experimenter hardware of interest to the Systems SIG is ongoing. All available testing and analysis results were collected and integrated by the Systems SIG. An overview of our findings is provided. An LDEF Optical Experiment Database containing information for all 29 optical related experiments is also discussed.

Mason, James B.; Dursch, Harry; Edelman, Joel

1993-01-01

286

Investigating Functional Dyspepsia in Asia  

PubMed Central

The diagnosis of functional dyspepsia (FD) is challenging since it depends largely on symptoms which are often heterogeneous and overlapping. This is particularly so in Asia with many different cultures and languages. Symptom-based diagnosis of FD based on Rome III criteria has not been fully validated and it may not be suitable in some Asian populations. Clinicians often assume that investigations in FD are not rewarding and physiological tests are often not available unless in the research setting. Investigation of alarm features and role of Helicobacter pylori in FD remain controversial but experts agreed that both should be tested. Physiological tests including gastric accommodation and chemical hypersensitivity tests are underutilized in Asia and available studies were few. While experts do not recommend routine clinical use of gastric accommodation tests but they agree that these tests can be advocated if clinically indicated. Empiric therapeutic trial is not currently a diagnostic option. The pathogenesis of FD is still poorly understood and there is a substantial placebo response. As a conclusion, a diagnosis of FD is challenging especially so in the context of Asia and despite the limitations of available physiological tests experts agreed that these tests can be advocated if and when clinically indicated. PMID:22837871

Lee, Yeong Yeh

2012-01-01

287

Bioanalysis Young Investigator: Sadagopan Krishnan.  

PubMed

Supervisor's supporting comments. I am pleased to recommend Sadagopan Krishnan for the Bioanalysis Young Investigator award. Sadagopan is a bright, creative and highly-motivated young bioanalytical chemist. His theses in our laboratory involved the development of electrochemiluminescent arrays for chemical toxicity screening utilizing cytochrome P450 metalloenzymes. He was senior author of a paper in Analytical Chemistry on this that was featured on the cover. He also investigated fundamental properties of human metabolic cytochrome P450s - research was carried out at his own initiative, and explains for the first time the role of iron spin state on enzyme electron transfer rates. He then developed thin films that mimic the natural cytochrome P450 redox cycle for the first time. He worked with several other group members to develop a superparamagnetic labeling scheme for immunosensing of proteins by surface plasmon resonance at unprecedented low levels, down to 10 fg/ml. Sadagopan has also demonstrated strong leadership skills. After his PhD, Sadagopan joined the group of Fraser Armstrong at Oxford University, UK, as a postdoctoral fellow. He is currently expanding his research horizons into the area of biofuel cells. His eventual goal is to join the faculty of a major university and build a world-class research group in bioanalytical chemistry. PMID:21545342

Krishnan, Sadagopan

2011-05-01

288

Investigation and bioremediation of pentachlorophenol  

SciTech Connect

This case study concerns the investigation and remediation of pentachlorophenol (PCP) impacted soil. The scope of activities are adaptable for use at federal facilities with polychlorinated hydrocarbon or similar impacted soils. The scope of activities included site characterization, biotreatability testing, fate and transport modeling, and on-site enhanced biodegradation within an engineered biopile augmented with air injection and soil moisture controls. Upon investigation, significant levels of PCP were discovered in site soils, PCP contamination was detected at levels exceeding regulatory limits in the shallow soil immediately surrounding the former dip tank. Groundwater did not contain detectable levels of PCP. Using the data collected, the Seasonal Soil Compartment Model (SESOIL) was utilized to assess the fate and transport mechanisms of PCP in the unsaturated zone to aid in identifying remediation options. The recommended remediation option included excavation and on-site enhanced (forced-air injection and soil moisture control) biostimulation of 2,400 cubic yards of affected soils. Negotiations with the regulatory agencies for acceptance of the proposed remedial activities and proposed clean-up levels were successful.

Metzinger, C.S. [EMCON, Sacramento, CA (United States)

1994-12-31

289

Measles investigation: a moving target.  

PubMed

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

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

2014-08-01

290

Rotational Investigation of Tropane Alkaloids  

NASA Astrophysics Data System (ADS)

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

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

2010-06-01

291

Fundamental Investigations of Airframe Noise  

NASA Technical Reports Server (NTRS)

An extensive numerical and experimental study of airframe noise mechanisms associated with a subsonic high-lift system has been performed at NASA Langley Research Center (LaRC). Investigations involving both steady and unsteady computations and experiments on a small-scale, part-span flap model are presented. Both surface (steady and unsteady pressure measurements, hot films, oil flows, pressure sensitive paint) and off surface (5 hole-probe, particle-imaged velocimetry, laser velocimetry, laser light sheet measurements) were taken in the LaRC Quiet Flow Facility (QFF) and several hard-wall tunnels up to flight Reynolds number. Successful microphone array measurements were also taken providing both acoustic source maps on the model, and quantitative spectra. Critical directivity measurements were obtained in the QFF. NASA Langley unstructured and structured Reynolds- Averaged Navier-Stokes codes modeled the flap geometries excellent comparisons with surface and offsurface experimental data were obtained. Subsequently, these meanflow calculations were utilized in both linear stability and direct numerical simulations of the flap-edge flow field to calculate unsteady surface pressures and farfield acoustic spectra. Accurate calculations were critical in obtaining not only noise source characteristics, but shear layer correction data as well. Techniques utilized in these investigations as well as brief overviews of results will be given.

Macaraeg, M. G.

2004-01-01

292

Investigating legal aspects of cyberbullying.  

PubMed

In the UK schools are required by law to protect students from bullying; the responsibility of teachers to govern such behaviour has been extended outside the school setting to include cyberbullying. In this investigation, cyberbullying in secondary education is explored from the student perspective using a qualitative method of enquiry. Reported awareness and understanding about the legal aspects of cyberbullying are investigated; consideration is given to legislation, cybercrime, children's rights, school sanctions and safeguarding responsibilities. A total of 197 male and female students aged between 11 and 14 years old participated. Despite the availability of information on guidelines and legislation at national, local, and school level, this does not appear to have reached ground level of the individual student. There is a considerable gap between what students should know and what they report to be aware of with regard to legal aspects of cyberbullying. To address concerns of keeping up with the pace of change in cyberbullying, a collaborative approach is required with young people and adults sharing expertise. PMID:23079364

Paul, Simone; Smith, Peter K; Blumberg, Herbert H

2012-11-01

293

Microgravity Science Glovebox Investigations SUBSA  

NASA Technical Reports Server (NTRS)

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.

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

294

AP Biology Investigation #6: Cellular Respiration  

NSDL National Science Digital Library

This is the Advanced Placement Investigation into cellular respiration (#6). The investigation was developed by the College Board for use in AP Biology classes. Students begin by investigating the question, What factors affect the rate of cellular respiration in multicellular organisms? Later, students investigate one of their own questions that arose during the first investigation. Wisconsin Fast Plants are used as a model organism.

Approach, Ap B.

295

What Makes a Successful Congressional Investigation?  

ERIC Educational Resources Information Center

Relates the story of the evolution of Congressional abilities to conduct investigations of governmental figures and agencies. Uses a series of famous investigations including Teapot Dome, the Pecora Wall Street Investigation, Senator Harry Truman's war-profiteering investigations, Senator Joseph McCarthy's anticommunist investigations, and…

Ritchie, Donald A.

1998-01-01

296

Investigation on drop size distribution  

NASA Astrophysics Data System (ADS)

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 drop size distribution, were experimentally determined. For swirl atomizer, all the factors causing mean diameter decreasing will decrease the parameter N. For air blast atomizer, increasing atomization air velocity, and decreasing air/liquid ratio will decrease the parameter N. N also increases with axial distance. Based on the experimental data, and the mathematical equation, the ratio of MMD/SMD is a single function of N and can be used to indicate the uniformity of drop size distribution of sprays, particularly for sprays expressed by different distribution functions.

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

1984-06-01

297

Phytochemical investigations on Iris germanica.  

PubMed

Phytochemical investigations on the methanol extract of Iris germanica resulted in the isolation of a new benzene derivative, 2'-methyl-6'-hydroxy cyclohexenyl-3-methyl-1-acetophenone ether (1). Further, another known benzene derivative, isopenol (2), also afforded two known isoflavones, irisolone (3) and irisolidone (4). The structure of the new compound was determined on the basis of spectroscopic data, including 2D-NMR experiments, while the known compounds were identified on the basis of their spectral data and existing literature evidence. The comparison of the spectral data of the irisolidone (3) with that reported for the molecule led us to revise some of the reported 1H-NMR chemical shift assignments. PMID:20077306

Asghar, Syeda Farina; Habib-ur-Rehman; Atta-ur-Rahman; Choudhary, M Iqbal

2010-01-01

298

Selling Complementary Patents: Experimental Investigation  

SciTech Connect

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.

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

2010-02-01

299

Numerical investigation of stall flutter  

SciTech Connect

Unsteady, separated, high Reynolds number flow over an airfoil undergoing oscillatory motion is investigated numerically. The compressible form of the Reynolds-averaged governing equations is solved using a high-order, upwind biased numerical scheme. The turbulent flow region is computed using a one-equation turbulence model. The computed results show that the key to the accurate prediction of the unsteady loads at stall flutter conditions is the modeling of the transitional flow region at the leading edge. A simplified criterion for the transition onset is used. The transitional flow region is computed with a modified form of the turbulence model. The computed solution, where the transitional flow region is included, shows that the small laminar/transitional separation bubble forming during the pitch-up motion has a decisive effect on the near-wall flow and the development of the unsteady loads. Detailed comparisons of computed fully turbulent and transitional flow solutions with experimental data are presented.

Ekaterinaris, J.A. [NASA Ames Research Center, Moffett Field, CA (United States). Navy-NASA Joint Inst. of Aeronautics; Platzer, M.F. [Naval Postgraduate School, Monterey, CA (United States). Dept. of Aeronautics and Astronautics

1996-04-01

300

Barchan dune asymmetry: Numerical investigation  

E-print Network

Barchan dunes --- crescent-shaped dunes that form in areas of unidirectional winds and low sand availability --- commonly display an asymmetric shape, with one limb extended downwind. Several factors have been identified as potential causes for barchan dune asymmetry on Earth and Mars: asymmetric bimodal wind regime, topography, influx asymmetry and dune collision. However, the dynamics and potential range of barchan morphologies emerging under each specific scenario that leads to dune asymmetry are far from being understood. In the present work, we use dune modeling in order to investigate the formation and evolution of asymmetric barchans. We find that a bimodal wind regime causes limb extension when the divergence angle between primary and secondary winds is larger than $90^{\\circ}$, whereas the extended limb evolves into a seif dune if the ratio between secondary and primary transport rates is larger than 25%. Calculations of dune formation on an inclined surface under constant wind direction also lead to...

Parteli, Eric J R; Bourke, Mary C; Tsoar, Haim; Poeschel, Thorsten; Herrmann, Hans J

2013-01-01

301

Investigation of ultraviolet interstellar extinction  

NASA Technical Reports Server (NTRS)

Results concerning interstellar extinction in the ultraviolet are reported. These results were initially obtained by using data from main-sequence stars and were extended to include supergiants and emission stars. The principal finding of the analysis of ultraviolet extinction is not only that it is wavelength dependent, but that if changes with galactic longitude in the U3 passband (lambda sub eff = 1621 A); it does not change significantly in the U2 passband (lambda sub eff = 2308 A). Where data are available in the U4 passband (lambda sub eff = 1537 A), they confirm the rapid rise of extinction in the ultraviolet found by other investigators. However, in all cases, emission stars must be used with great caution. It is important to realize that while extinction continues to rise toward shorter wavelengths in the ultraviolet, including the shortest ultraviolet wavelengths measured (1100 A), it no longer plays an important role in the X-ray region (50 A).

Payne, C.; Haramundanis, K. L.

1973-01-01

302

Investigations into Planetary Dust Adhesion  

NASA Astrophysics Data System (ADS)

Adhesion is the force of attraction between a dust particle and a surface. The magnitude of dust adhesion is an important factor that affects the functioning of spacecraft and equipment during the planetary surface exploration. An improved understanding of the mechanisms that govern dust adhesion will allow for the development of dust mitigation strategies. Experimental and theoretical investigations are underway to better determine the effect of different planetary environments on dust adhesion. The mechanisms of dust adhesion include covalent bonding, hydrogen bonding, cementation, ice bridges, capillary forces, van der Waals forces, and electrostatic forces. All forces that contribute to dust adhesion are functions of the distance between a dust particle and a surface. When the energy of gas adsorption is greater than the adhesion energy, a dust particle will be separated from a surface by a layer of adsorbed gas. The thickness of adsorbed gas controls the spacing between the dust particle and the surface. Adsorbed gas thickness is a function of the ambient environmental conditions. Thus, planetary environment affects adhesion. Past experiments on powdered minerals in different environments have shown that adhesion is significantly affected by temperature, humidity, and atmospheric pressure. In Earth's environment, dust adhesion is most affected by capillary forces and humidity. In the lunar environment, ultrahigh vacuum produces strong adhesion. In Martian and cometary environments, ice condensation may control adhesion. A theoretical model is being developed by the investigators. The model is based on van der Waals and electrostatic forces acting across adsorbed gas. The model accounts for ice condensation and capillary tension and can be employed to explain the effects of environmental conditions on dust adhesion. Laboratory experiments are being conducted and results are being compared with the model.

Perko, H. A.; Green, J. R.; Nelson, J. D.

2001-12-01

303

Investigation of Celestial Solid Analogs  

NASA Technical Reports Server (NTRS)

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.

Sievers, A. J.

2003-01-01

304

Spectroscopic investigation of protein corona  

NASA Astrophysics Data System (ADS)

Nanotechnology has revolutionalized the landscape of modern science and technology, including materials, electronics, therapeutics, bioimaging, sensing, and the environment. Research in the past decade has examined the fate of nanomaterials in vitro and in vivo, as well as the interactions between nanoparticles and biological and ecosystems using primarily toxicological and ecotoxicological approaches. However, due to the versatility in the physical and physicochemical properties of nanoparticles, and due to the vast complexity of their hosting systems, the solubility, transformation, and biocompatibility of nanomaterials are still poorly understood. Nanotechnology has been undergoing tremendous development in recent decades, driven by realized perceived applications of nanomaterials in electronics, therapeutics, imaging, sensing, environmental remediation, and consumer products. Nanoparticles on entering the blood stream undergo an identity change, they become coated with proteins. There are different kind of proteins present in blood. Proteins compete for getting coated over the surface of nanoparticle and this whole entity of proteins coated over nanoparticle surface is called Protein Corona. Proteins tightly bound to the surface of nanoparticle form hard corona and the ones loosely bound on the outer surface form soft corona. This dissertation is aimed at spectroscopic investigation of Protein Corona. Chapter I of this dissertation offers a comprehensive review of the literature based on nanomaterials with the focus on carbon based nanomaterilas and introduction to Protein Corona. Chapter II is based different methods used for Graphene Synthesis,different types of defects and doping. In Chapter III influence of defects on Graphene Protein Corona was investigated. Chapter IV is based on the study of Apoptosis induced cell death by Gold and silver nanoparticles. In vitro study of effect of Protein Corona on toxicity of cells was done.

Choudhary, Poonam

305

Investigation and management of dysphagia.  

PubMed

Dysphagia is a common finding in infants and children with neuromuscular disabilities. Dysphagia may be developmental, as in the preterm infant, transient, chronic, or progressive. The evaluation of dysphagia must take into account the age of the patient and typical development of feeding and swallowing for that age. The typical abilities seen in neonatal, early infancy, later infancy and early childhood periods vary in sensorimotor skills and feeding efficiency. In addition to knowing the substrate of expected skills by age, knowledge of the neurophysiology of feeding and swallowing is essential to diagnosis. Each physiologic phase of deglutition: oral, pharyngeal, and esophageal can present with symptoms of dysphagia that can guide investigation. Common symptoms of dysphagia include generalized feeding difficulty such as poor efficiency, food refusal and failure to thrive. Specific symptoms include tongue thrust, choking, cough, and oxygen desaturation. The possibility of dysphagia can be identified through a thorough feeding history. Examination initially includes the infant's muscle tone and posture in the head, neck and body. Anomalies of structures of the head and neck must be identified and examined for their effect on function. Next, examination of oral structures for reflexes, tongue movements, and symmetry will identify neurologic abnormalities. Observation of feeding is essential and will reveal signs of dysphagia. Aspiration in the infant can present without specific signs. Respiratory abnormalities or Gastroesophageal reflux can be identified during history or examination. Investigation of dysphagia most commonly includes videofluoroscopy, endoscopy, and ultrasonography. The management of dysphagia requires an individualized approach and will include neurologic, respiratory, nutritional and possibly gastrointestinal management. Six broad areas are identified that must be considered in the management of dysphagia in infants and children. They include: normalization of posture and positioning, adaptation of foods and feeding equipment, oromotor therapy, feeding therapy, nutritional support and management of associated disorders. A team of professionals will assist the parent and child in achieving pleasant feedings to foster appropriate growth and development. PMID:14992457

Dusick, Anna

2003-12-01

306

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 2010-07-01 false Ethics investigation. 776.84 Section 776.84...Complaint Processing Procedures § 776.84 Ethics investigation. (a) Whenever an ethics investigation is initiated, the covered...

2010-07-01

307

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 2011-07-01 false Ethics investigation. 776.84 Section 776.84...Complaint Processing Procedures § 776.84 Ethics investigation. (a) Whenever an ethics investigation is initiated, the covered...

2011-07-01

308

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 2013-07-01 false Ethics investigation. 776.84 Section 776.84...Complaint Processing Procedures § 776.84 Ethics investigation. (a) Whenever an ethics investigation is initiated, the covered...

2013-07-01

309

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 2014-07-01 false Ethics investigation. 776.84 Section 776.84...Complaint Processing Procedures § 776.84 Ethics investigation. (a) Whenever an ethics investigation is initiated, the covered...

2014-07-01

310

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 2012-07-01 false Ethics investigation. 776.84 Section 776.84...Complaint Processing Procedures § 776.84 Ethics investigation. (a) Whenever an ethics investigation is initiated, the covered...

2012-07-01

311

29 CFR 32.45 - Investigations.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Investigations. 32.45 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Procedures § 32.45 Investigations. (a) Periodic compliance...which will assist in the investigation and resolution of...

2012-07-01

312

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Investigation. 91.44 Section 91...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement...Procedures § 91.44 Investigation. (a) Informal...

2011-10-01

313

29 CFR 32.45 - Investigations.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 true Investigations. 32.45 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Procedures § 32.45 Investigations. (a) Periodic compliance...which will assist in the investigation and resolution of...

2010-07-01

314

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Investigation. 91.44 Section 91...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement...Procedures § 91.44 Investigation. (a) Informal...

2013-10-01

315

29 CFR 32.45 - Investigations.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Investigations. 32.45 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Procedures § 32.45 Investigations. (a) Periodic compliance...which will assist in the investigation and resolution of...

2011-07-01

316

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 false Investigation. 91.44 Section 91...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement...Procedures § 91.44 Investigation. (a) Informal...

2014-10-01

317

29 CFR 35.33 - Investigations.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Investigations. 35.33 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE DEPARTMENT OF LABOR Investigation, Conciliation, and...Procedures § 35.33 Investigations. (a) Initial...

2012-07-01

318

29 CFR 35.33 - Investigations.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Investigations. 35.33 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE DEPARTMENT OF LABOR Investigation, Conciliation, and...Procedures § 35.33 Investigations. (a) Initial...

2011-07-01

319

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Investigation. 91.44 Section 91...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement...Procedures § 91.44 Investigation. (a) Informal...

2010-10-01

320

29 CFR 32.45 - Investigations.  

Code of Federal Regulations, 2014 CFR

...2013-07-01 true Investigations. 32.45 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Procedures § 32.45 Investigations. (a) Periodic compliance...which will assist in the investigation and resolution of...

2014-07-01

321

29 CFR 32.45 - Investigations.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Investigations. 32.45 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Procedures § 32.45 Investigations. (a) Periodic compliance...which will assist in the investigation and resolution of...

2013-07-01

322

29 CFR 35.33 - Investigations.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Investigations. 35.33 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE DEPARTMENT OF LABOR Investigation, Conciliation, and...Procedures § 35.33 Investigations. (a) Initial...

2013-07-01

323

29 CFR 35.33 - Investigations.  

Code of Federal Regulations, 2014 CFR

...2013-07-01 true Investigations. 35.33 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE DEPARTMENT OF LABOR Investigation, Conciliation, and...Procedures § 35.33 Investigations. (a) Initial...

2014-07-01

324

29 CFR 35.33 - Investigations.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 true Investigations. 35.33 Section...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE DEPARTMENT OF LABOR Investigation, Conciliation, and...Procedures § 35.33 Investigations. (a) Initial...

2010-07-01

325

FINANCIAL DISCLOSURE FORM Name of Investigator ____________________________________________________ Date __________________  

E-print Network

FINANCIAL DISCLOSURE FORM Name of Investigator. #12;NOTES: Each investigator is responsible for updating this financial disclosure statement during stocks or stock options in which the Investigators' holdings exceed $10,000. 2. List the sources of all

O'Laughlin, Jay

326

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Investigation. 91.44 Section 91...ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement...Procedures § 91.44 Investigation. (a) Informal...

2012-10-01

327

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2013 CFR

...NONDISCRIMINATION IN FEDERALLY-ASSISTED PROGRAMS (FEMA REG. 5) Nondiscrimination on the...Receiving Federal Financial Assistance From FEMA Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) FEMA will investigate complaints that...

2013-10-01

328

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2011 CFR

...NONDISCRIMINATION IN FEDERALLY-ASSISTED PROGRAMS (FEMA REG. 5) Nondiscrimination on the...Receiving Federal Financial Assistance From FEMA Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) FEMA will investigate complaints that...

2011-10-01

329

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2012 CFR

...NONDISCRIMINATION IN FEDERALLY-ASSISTED PROGRAMS (FEMA REG. 5) Nondiscrimination on the...Receiving Federal Financial Assistance From FEMA Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) FEMA will investigate complaints that...

2012-10-01

330

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2014 CFR

...NONDISCRIMINATION IN FEDERALLY-ASSISTED PROGRAMS (FEMA REG. 5) Nondiscrimination on the...Receiving Federal Financial Assistance From FEMA Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) FEMA will investigate complaints that...

2014-10-01

331

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2010 CFR

...NONDISCRIMINATION IN FEDERALLY-ASSISTED PROGRAMS (FEMA REG. 5) Nondiscrimination on the...Receiving Federal Financial Assistance From FEMA Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) FEMA will investigate complaints that...

2010-10-01

332

45 CFR 1156.17 - Investigation.  

Code of Federal Regulations, 2010 CFR

...THE ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE ARTS NONDISCRIMINATION ON THE...Informal investigation. (1) The Endowment will investigate complaints that are...part of the initial investigation, the Endowment will use informal...

2010-10-01

333

45 CFR 1156.17 - Investigation.  

Code of Federal Regulations, 2011 CFR

...THE ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE ARTS NONDISCRIMINATION ON THE...Informal investigation. (1) The Endowment will investigate complaints that are...part of the initial investigation, the Endowment will use informal...

2011-10-01

334

45 CFR 1156.17 - Investigation.  

Code of Federal Regulations, 2013 CFR

...THE ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE ARTS NONDISCRIMINATION ON THE...Informal investigation. (1) The Endowment will investigate complaints that are...part of the initial investigation, the Endowment will use informal...

2013-10-01

335

45 CFR 1156.17 - Investigation.  

Code of Federal Regulations, 2014 CFR

...THE ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE ARTS NONDISCRIMINATION ON THE...Informal investigation. (1) The Endowment will investigate complaints that are...part of the initial investigation, the Endowment will use informal...

2014-10-01

336

45 CFR 1156.17 - Investigation.  

Code of Federal Regulations, 2012 CFR

...THE ARTS AND THE HUMANITIES NATIONAL ENDOWMENT FOR THE ARTS NONDISCRIMINATION ON THE...Informal investigation. (1) The Endowment will investigate complaints that are...part of the initial investigation, the Endowment will use informal...

2012-10-01

337

19 CFR 204.4 - Supplemental investigations.  

Code of Federal Regulations, 2010 CFR

...investigations. 204.4 Section 204.4 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION NONADJUDICATIVE INVESTIGATIONS INVESTIGATIONS OF EFFECTS OF IMPORTS ON AGRICULTURAL PROGRAMS § 204.4 Supplemental...

2010-04-01

338

49 CFR 225.31 - Investigations.  

Code of Federal Regulations, 2010 CFR

... Investigations. (a) It is the policy of the FRA to investigate rail transportation accidents/incidents which result...railroad safety. (b) FRA representatives are authorized to investigate accidents/incidents and have been issued...

2010-10-01

339

30 CFR 50.11 - Investigation.  

Code of Federal Regulations, 2010 CFR

...the operator of his decision. If MSHA decides to investigate an accident, it will initiate the investigation...notification. (b) Each operator of a mine shall investigate each accident and each occupational...

2010-07-01

340

Investigation of irradiated soil byproducts.  

PubMed

The high dose irradiation of windblown soil deposited onto the surface of spent nuclear fuel is of concern to long-term fuel storage stability. Such soils could be exposed to radiation fields as great as 1.08 x 10(-3) C/kg-s (15,000 R/hr) during the 40-year anticipated period of interim dry storage prior to placement at the proposed national repository. The total absorbed dose in these cases could be as high as 5 x 10(7) Gy (5 x 10(9) rads). This investigation evaluated the potential generation of explosive or combustible irradiation byproducts during this irradiation. It focuses on the production of radiolytic byproducts generated within the pore water of surrogate clays that are consistent with those found on the Idaho National Engineering and Environmental Laboratory. Synthesized surrogates of localized soils containing combinations of clay, water, and aluminum samples, enclosed within a stainless steel vessel were irradiated and the quantities of the byproducts generated measured. Two types of clays, varying primarily in the presence of iron oxide, were investigated. Two treatment levels of irradiation and a control were investigated. An 18-Mev linear accelerator was used to irradiate samples. The first irradiation level provided an absorbed dose of 3.9 x 10(5)+/-1.4 x 10(5)Gy (3.9 x 10(7)+/-1.4 x 10(7) rads) in a 3-h period. At the second irradiation level, 4.8 x 10(5)+/-2.0 x 10(5)Gy (4.8 x 10(7)+/-2.0 x 10(7) rads) were delivered in a 6-h period. When averaged over all treatment parameters, irradiated clay samples with and without iron (III) oxide (moisture content = 40%) had a production rate of hydrogen gas that was a strong function of radiation-dose. A g-value of 5.61 x 10(-9)+/-1.56 x 10(-9) mol/J (0.054+/-0.015 molecules/100-eV) per mass of pore water was observed in the clay samples without iron (III) oxide for hydrogen gas production. A g-value of 1.07 x 10(-8)+/-2.91 x 10(-9) mol/J (0.103+0.028 molecules/100-eV) per mass of pore water was observed in the iron (III) oxide containing clay samples for hydrogen gas production. This value was noticeably larger when the samples were spiked with both KCl and KNO3 salts. The ratio of oxygen to nitrogen gas was observed to increase as a function of absorbed dose particularly in the presence of both KCl and KNO3 salts. The creation of radiolytic byproducts produced an observable but small increase in headspace pressure. Temperature increases during irradiation were not observed. Additionally, KCl and KNO3 salts added to the clays enhanced nitrite production as a function of radiation-dose and the type of clay considered. The addition of aluminum to these samples had no statistically discernable impact at the alpha = 0.05 level. Generation of the irradiation products, hydrogen peroxide and hydrogen gas also depended upon the type of clay irradiated and the presence of both KCl and KNO3 salts and the total dose received. PMID:11478625

Brey, R R; Rodriguez, R; Harmon, J F; Winston, P

2001-01-01

341

An investigation of turbulence models  

NASA Technical Reports Server (NTRS)

The accuracy to which a turbulent boundary layer or wake can be predicted numerically depends on the validity of the turbulence closure model used. The modeling of turbulence physics is one of the most difficult problems in computational fluid dynamics (CFD). In fact, it is one of the pacing factors in the development of CFD. In general, there are three main approaches to the description of trubulence physics. First is turbulence modeling in which the Reynolds averaged Navier-Stokes equations are used and some closure approximation is made for the Reynolds stresses. A second approach to turbulence is large eddy simulation (LES) in which the computational mesh is taken to be fine enough that the large scale structure of the turbulence can be calculated directly. An empirical assumption must be made for the small scale sub-grid turbulence. The third approach is direct simulation. In this technique the Navier-Strokes equations are solved directly on a mesh which if fine enough to resolve the smallest length scale of the turbulence. The Reynolds averaged equations are not used and no closure assumption is required. These last two approaches require extensive computer resources and as such are not engineering tools. The purpose of the work was to investigate the various engineering turbulence models for accuracy and ease of programming. This involved comparison of the models with each other and with experimental data.

Doria, Michael L.

1988-01-01

342

Groundwater Resources: Investigation and Development  

NASA Astrophysics Data System (ADS)

A glance through the table of contents of this volume might suggest that it is yet another introductory text on principles of groundwater hydrology. All of the usual basic topics are covered including definitions of terms and concepts, aquifer types, drilling methods, and pumping tests. But partly because this book is intended for practicing groundwater consultants rather than students, other less elementary topics such as environmental isotope techniques, geochemical methods, interpretation and utilization of spring flow, geophysical methods, and groundwater balances are also included.According to the preface, ‘practical applicability’ is stressed ‘to show how groundwater investigations should be conducted using a systematic, well-directed effort’ and to describe ‘… what to do, what to avoid, and what kind of results one can reasonably expect …’ While this book was published as part of a series of monographs on water pollution, it is more in the nature of a handbook than a true monograph. That is, it is not an in-depth treatment of a single topic but presents a broad introduction to the ways in

Anderson, Mary P.

343

Theoretical investigation of astacin proteolysis.  

PubMed

Astacin, acting as the prototype of astacin family and of the metzincin superfamily, is a mononuclear zinc enzyme that catalyzes the hydrolysis of polypeptides and proteins. In the present article, the reaction mechanism of astacin has been investigated using density functional theory (DFT) method. Using a model of the active site constructed on the basis of the X-ray crystal structure of astacin, the potential energy surface for catalytic reaction has been mapped and the transition states and intermediates along the reaction pathway are characterized. The calculations give general support to the previously proposed mechanism by experiments, which mainly involve nucleophilic attack on carbonyl group of substrate and C-N bond cleavage, and reveal more detailed mechanistic features. The Glu93 functions as a crucial general base to activate the zinc-bound water and the resulting zinc-bound hydroxide acts as the real nucleophile. It is demonstrated that there exists a "reactant region", where the interconversion between zinc-bound water and zinc-bound hydroxide occurs rapidly. The rate-limiting step is predicted to be the nucleophilic attack, which leads to an anionic gem-diolate tetrahedral intermediate. During the catalysis, zinc ion provides main catalytic power by stabilizing the developing charge of tetrahedral intermediate, while the Tyr149 residue also partially contributes to the catalysis by stabilizing the anionic intermediate. In addition, it is shown that the Cys64 plays roles in assisting in binding and orientating the substrate via electrostatic interaction. PMID:22484502

Chen, Shi-Lu; Li, Ze-Sheng; Fang, Wei-Hai

2012-06-01

344

Gelled MMH hypergolic droplet investigation  

NASA Astrophysics Data System (ADS)

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.

Solomon, Yair

345

Scientists Investigate Recent Philippine Landslide  

NASA Astrophysics Data System (ADS)

A massive landslide devastated the community of Barangay Guinsaugon, Municipality of St. Bernard, Southern Leyte Province, Philippines, at about 10:30 local time on 17 February. The landslide occurred along the steep fault scarp of the Philippine Fault Zone (PFZ) (Figure 1a), a large and active tectonic structure that traverses the entire length of the Philippines [Allen, 1962]. Barangay Guinsaugon is located at the foot of the scarp, directly in the path of the downward moving mass of earth. As of 24 February, the landslide caused 122 confirmed deaths; 1,328 people still are missing. To assist in the search and rescue operations that followed the landside, a team of geologists and physicists from the University of Philippines (UP-Diliman, Quezon City) and Ateneo de Manila University conducted an investigation of this area on 21-25 February. The UP-Ateneo team provided technical advice on the geology, which included the identification of the type and characteristics of the landslide.

Lagmay, Alfredo Mahar A.; Ong, John Burtkenley T.; Fernandez, Dan Ferdinand D.; Lapus, Mark R.; Rodolfo, Raymond S.; Tengonciang, Arlene Mae P.; Soria, Janneli Lea A.; Baliatan, Eden G.; Quimba, Zareth L.; Uichanco, Christopher L.; Paguican, Engielle Mae R.; Remedio, Armelle Reca C.; Lorenzo, Genevieve Rose H.; Avila, Francia B.; Valdivia, Waldemar

2006-03-01

346

Investigation into nitrided spur gears  

SciTech Connect

The cold forging method has been widely used in industry to produce machine parts. In general, gears are produced by shaping or hobbing. One of the shaping techniques is precision forging, which has several advantages over hobbing. In the present study, cold forging of spur gears from Ti-6Al-4V material is introduced. To improve the surface properties of the resulting gears, plasma nitriding was carried out. Nuclear reaction analysis was carried out to obtain the nitrogen concentration, while the micro-PIXE technique was used to determine the elemental distribution in the matrix after forging and nitriding processes. Scanning electron microscopy and x-ray powder diffraction were used to investigate the metallurgical changes and formation of nitride components in the surface region. Microhardness and friction tests were carried out to measure the hardness depth profile and friction coefficient at the surface. Finally, scoring failure tests were conducted to determine the rotational speed at which the gears failed. Three distinct regions were obtained in the nitride region, and at the initial stages of the scoring tests, failure in surface roughness was observed in the vicinity of the tip of the gear tooth. This occurred at a particular rotational speed and work input.

Yilbas, B.S.; Coban, A.; Nickel, J.; Sunar, M.; Sami, M.; Abdul Aleem, B.J. [King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia)

1996-12-01

347

Supercritical waste oxidation pump investigation  

SciTech Connect

This report investigates the pumping techniques and pumping equipment that would be appropriate for a 5,000 gallon per day supercritical water oxidation waste disposal facility. The pumps must boost water, waste, and additives from atmospheric pressure to approximately 27.6 MPa (4,000 psia). The required flow ranges from 10 gpm to less than 0.1 gpm. For the higher flows, many commercial piston pumps are available. These pumps have packing and check-valves that will require periodic maintenance; probably at 2 to 6 month intervals. Several commercial diaphragm pumps were also discovered that could pump the higher flow rates. Diaphragm pumps have the advantage of not requiring dynamic seals. For the lower flows associated with the waste and additive materials, commercial diaphragm pumps. are available. Difficult to pump materials that are sticky, radioactive, or contain solids, could be injected with an accumulator using an inert gas as the driving mechanism. The information presented in this report serves as a spring board for trade studies and the development of equipment specifications.

Thurston, G.; Garcia, K.

1993-02-01

348

Mission Investigates Tropical Cirrus Clouds  

NASA Astrophysics Data System (ADS)

It has been a year since NASA conducted the highly successful Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment Study (CRYSTAL-FACE). The measurement campaign was designed to investigate the physical properties and formation processes of tropical cirrus clouds. CRYSTAL-FACE was sponsored by NASA's Earth Science Enterprise as an integral component of its Earth observation research strategy, and included substantial collaboration with the National Oceanic and Atmospheric Administration, the National Science Foundation, the Department of Energy, and the Naval Research Laboratory. During July 2002, the mission's six aircraft (NASA ER-2, NASA WB-57, Scaled Composites Proteus, University of North Dakota Citation, NSF-supported NRL P-3, and NRL Twin Otter) operated from the Key West Naval Air Facility. In addition, ground sites were located at the Tamiami airport on the east coast of Florida and near Everglades City on the west coast of Florida. Aircraft and ground site measurements are listed in Table 1. Data archiving is complete, and the data are now available to the general scientific community. Detailed instrument descriptions as well as the final data can be found on the CRYSTAL-FACE Web site (http://cloud1.arc.nasa.gov/crystalface/).

Jenson, Eric; Starr, David; Toon, Owen B.

2004-02-01

349

Tribological investigation of oriented HDPE.  

PubMed

The possibility to control the wear properties of high-density polyethylene (HDPE) material at an early processing stage is explored. Wear measurements of cold roll-drawn HDPE with two different draw ratios were carried out for three sliding planes, each in two directions. The dependence of the wear properties on the degree and direction of orientation was investigated. The experiments were performed in a pin-on-disc machine in a dry environment. The tribo-couple consisted of HDPE plates versus a standardised diamond coated steel disc. The results show that the wear resistance of cold roll-drawn HDPE differ widely, by a factor up to 6, depending on the sliding direction relative to the drawing direction. The material has a significantly better wear resistance when the sliding direction was perpendicular to the processing direction. The best wear resistance was in the end plane and it was improved by a factor up to 3.6 when the draw ratio was increased from 2 to 4. These results indicate that molecular orientation by polymer processing is a promising method to improve the wear properties and decrease the wear debris production of HDPE. PMID:12115454

Hoseini, Mohammed; Lausmaa, Jukka; Boldizar, Antal

2002-09-15

350

Structural investigation of graphitic foam  

NASA Astrophysics Data System (ADS)

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.

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

2002-03-01

351

Bioanalysis young investigator: Sathyadevi Venkataramani.  

PubMed

It is with great pleasure that I am writing to recommend Sathyadevi Venkataramani who works as a Scientist in Integrated BioTherapeutics (IBT). Sathya did her graduate research work at the University of Zurich (Switzerland) where she focused on using various bioanalytical tools to characterize the stability of repeat proteins that are emerging as excellent alternatives to antibody therapy. She successfully published her research findings in journals including Protein Science, Biochemistry and Current Microbiology. As a postdoctoral associate at Stanford University (CA, USA) and as a Scientist in Solus Biosystems (CA, USA), she thoroughly investigated the applications of spectroscopy and chromatography for characterizing the stability of monoclonal antibodies and other therapeutic proteins. Being the first author in all her publications and corresponding author of her last few highlights her highly competent skills (both writing and oral), enthusiasm, research motivation, hard work, scientific capabilities, innovative thinking and the terrific passion in implementing those. I am very impressed that she is serving as an ad-hoc peer reviewer for journals such as Molecular Biology Reports, American Association of Pharmaceutical Scientists PharmSciTech, Research and Reports in Biochemistry and as a Faculty of Biochemistry for Webmed Central. Currently she is leading the protein chemistry group in Integrated BioTherapeutics, Inc. (IBT) and is already in possession of a couple of manuscripts and patents from IBT. Her expertise and unquenchable enthusiasm in the bioanalysis field have tremendously helped to improve the quality and quantity of proteins in IBT. It is a very commendable idea of Bioanalysis to appreciate and recognize the young rising stars of the scientific world and I am very excited and honored to recommend Sathya among those for the year 2012. PMID:22612680

Venkataramani, Sathyadevi

2012-05-01

352

Field investigation of keyblock stability  

SciTech Connect

Discontinuities in a rock mass can intersect an excavation surface to form discrete blocks (keyblocks) which can be unstable. This engineering problem is divided into two parts: block identification, and evaluation of block stability. One stable keyblock and thirteen fallen keyblocks were observed in field investigations at the Nevada Test Site. Nine blocks were measured in detail sufficient to allow back-analysis of their stability. Measurements included block geometry, and discontinuity roughness and compressive strength. Back-analysis correctly predicted stability or failure in all but two cases. These two exceptions involved situations that violated the stress assumptions of the stability calculations. Keyblock faces correlated well with known joint set orientations. The effect of tunnel orientation on keyblock frequency was apparent. Back-analysis of physical models successfully predicted block pullout force for two-dimensional models of unit thickness. Two-dimensional (2D) and three-dimensional (3D) analytic models for the stability of simple pyramidal keyblocks were examined. Calculated stability is greater for 3D analyses than for 2D analyses. Calculated keyblock stability increases with larger in situ stress magnitudes, larger lateral stress ratios, and larger shear strengths. Discontinuity stiffness controls block displacement more strongly than it does stability itself. Large keyblocks are less stable than small ones, and stability increases as blocks become more slender. Rock mass temperature decreases reduce the confining stress magnitudes and can lead to failure. The pattern of stresses affecting each block face explains conceptually the occurrence of pyramidal keyblocks that are truncated near their apex.

Yow, J.L. Jr.

1985-04-01

353

[Ethics in nursing research and investigation].  

PubMed

Investigation is indispensable for the nursing profession because it contributes to the development of the overall set of knowledge the profession has and thereby improves the practical, clinical care given to patients. However if we look into the history of research and investigation, we realize that investigators have not always respected persons' fundamental rights. This article starts with a short introduction which highlights the role played by investigation for the nursing profession. Then the author presents a historical overview on investigation in order to provide insights into the ethical problems related to investigation, and finally the author comments on the main ethical criteria which should be followed during investigation by nurses. PMID:20143735

Busquets Alibés, Ester

2009-12-01

354

Investigating Reaction-Driven Cracking  

NASA Astrophysics Data System (ADS)

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

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

2013-12-01

355

33 CFR 116.20 - Detailed investigation.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Detailed investigation. 116.20 Section 116.20 Navigation and Navigable Waters COAST GUARD... ALTERATION OF UNREASONABLY OBSTRUCTIVE BRIDGES § 116.20 Detailed investigation. (a) When...

2010-07-01

356

33 CFR 116.15 - Preliminary investigation.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Preliminary investigation. 116.15 Section 116.15 Navigation and Navigable Waters COAST GUARD... ALTERATION OF UNREASONABLY OBSTRUCTIVE BRIDGES § 116.15 Preliminary investigation. (a)...

2010-07-01

357

EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF SNOW MELTING  

E-print Network

EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF SNOW MELTING ON HEATED HORIZONTAL SURFACES By SEAN INVESTIGATION OF SNOW MELTING ON HEATED HORIZONTAL SURFACES Thesis Approved: Dean of the Graduate College Thesis..............................................................................................................5 2.3 Snow/Ice Physical Properties

358

10 CFR 4.334 - Investigation.  

Code of Federal Regulations, 2013 CFR

...false Investigation. 4.334 Section 4.334 Energy NUCLEAR REGULATORY COMMISSION NONDISCRIMINATION IN FEDERALLY ASSISTED...ASSISTANCE FROM THE COMMISSION Regulations Implementing the Age Discrimination Act of 1975, as Amended Investigation,...

2013-01-01

359

10 CFR 4.334 - Investigation.  

Code of Federal Regulations, 2012 CFR

...false Investigation. 4.334 Section 4.334 Energy NUCLEAR REGULATORY COMMISSION NONDISCRIMINATION IN FEDERALLY ASSISTED...ASSISTANCE FROM THE COMMISSION Regulations Implementing the Age Discrimination Act of 1975, as Amended Investigation,...

2012-01-01

360

10 CFR 4.334 - Investigation.  

Code of Federal Regulations, 2011 CFR

...false Investigation. 4.334 Section 4.334 Energy NUCLEAR REGULATORY COMMISSION NONDISCRIMINATION IN FEDERALLY ASSISTED...ASSISTANCE FROM THE COMMISSION Regulations Implementing the Age Discrimination Act of 1975, as Amended Investigation,...

2011-01-01

361

10 CFR 4.334 - Investigation.  

Code of Federal Regulations, 2014 CFR

...false Investigation. 4.334 Section 4.334 Energy NUCLEAR REGULATORY COMMISSION NONDISCRIMINATION IN FEDERALLY ASSISTED...ASSISTANCE FROM THE COMMISSION Regulations Implementing the Age Discrimination Act of 1975, as Amended Investigation,...

2014-01-01

362

10 CFR 4.334 - Investigation.  

Code of Federal Regulations, 2010 CFR

...false Investigation. 4.334 Section 4.334 Energy NUCLEAR REGULATORY COMMISSION NONDISCRIMINATION IN FEDERALLY ASSISTED...ASSISTANCE FROM THE COMMISSION Regulations Implementing the Age Discrimination Act of 1975, as Amended Investigation,...

2010-01-01

363

41 CFR 101-39.403 - Investigation.  

Code of Federal Regulations, 2010 CFR

...agency employing the vehicle operator shall investigate the accident within 48 hours after...may investigate any accident involving an IFMS vehicle when deemed necessary...statements, the Motor Vehicle Accident Report (SF...

2010-07-01

364

40 CFR 7.120 - Complaint investigations.  

Code of Federal Regulations, 2010 CFR

...120 Complaint investigations. The OCR shall promptly investigate all complaints...alleged discriminatory acts, unless the OCR waives the time limit for good cause...discriminatory acts. (c) Notification. The OCR will notify the complainant and the...

2010-07-01

365

Investigating Processes of Sedimentation in Gravel Pits  

NSDL National Science Digital Library

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.

Olson, Melissa

366

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2013 CFR

... Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS South Pacific Tuna Fisheries § 300.41 Investigation notification. Upon commencement of an investigation under section 10(b)(1) of...

2013-10-01

367

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2012 CFR

... Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS South Pacific Tuna Fisheries § 300.41 Investigation notification. Upon commencement of an investigation under section 10(b)(1) of...

2012-10-01

368

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2011 CFR

... Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS South Pacific Tuna Fisheries § 300.41 Investigation notification. Upon commencement of an investigation under section 10(b)(1) of...

2011-10-01

369

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2010 CFR

... Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS South Pacific Tuna Fisheries § 300.41 Investigation notification. Upon commencement of an investigation under section 10(b)(1) of...

2010-10-01

370

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2014 CFR

... Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS South Pacific Tuna Fisheries § 300.41 Investigation notification. Upon commencement of an investigation under section 10(b)(1) of...

2014-10-01

371

Integrating the Sciences to Investigate Groundwater Pollution  

ERIC Educational Resources Information Center

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,…

Grady, Julie R.; Madden, Andrew S.

2010-01-01

372

Modern accident investigation – Four major challenges  

Microsoft Academic Search

Nowadays, ‘investigation’ is a very commonly advocated approach and consequently is becoming an umbrella concept. ‘Investigation’ includes many types of approaches on different system levels. Originating from transport accidents and crime scenes, ‘investigation’ ranges from genocide, natural disasters, via discrimination, health care to crime fighting, economic fraud and ethical questions in engineering and management. In such a changing operating environment

Sverre Roed-Larsen; John Stoop

373

Physics. Teacher's Guide. Investigations in Natural Science.  

ERIC Educational Resources Information Center

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 teaching guide is designed for use with the 36 physics investigations found in the student manual. These investigations focus on concepts related to:…

Renner, John W.; And Others

374

A Classroom Investigation into the Catenary  

ERIC Educational Resources Information Center

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…

Staples, Ed

2011-01-01

375

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

376

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 National Laboratory, DK-4000 Roskilde, Denmark June 1980 #12;INVESTIGATIONS OF ELECTROSTATIC ION WAVES IN A COLLISIONLESS PLASMA BY POUL MICHELSEN #12;RIS�-R-417 INVESTIGATIONS OF ELECTROSTATIC ION WAVES

377

The engineering investigation of aircraft accidents  

NASA Technical Reports Server (NTRS)

The organization and plan for an investigation, procedures used at the scene of the accident, engineering aspects covered in the main investigation, use of special analytical techniques and simulation tools, and use of flight recorder data are discussed. Examples of investigations are used to illustrate the processes used.

Anderson, S. B.

1982-01-01

378

Biology. Teacher's Guide. Investigations in Natural Science.  

ERIC Educational Resources Information Center

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 teaching guide is designed for use with the 18 biology investigations found in the student manual. These investigations focus on concepts related to:…

Renner, John W.; And Others

379

An Extended Model of Cybercrime Investigations  

Microsoft Academic Search

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

Seamus O. Ciardhuáin

2004-01-01

380

Mathematical Investigations--Powerful Learning Situations.  

ERIC Educational Resources Information Center

Lists questions and answers for mathematical investigations that teachers should ask when they consider using alternative approaches to teach new content. Presents an example of a mathematical investigation on concepts of area, symmetry, pattern, function, algebraic rules, and Pythagorean theorem. Argues that investigations offer opportunities for…

Chapin, Suzanne H.

1998-01-01

381

Investigational drug practices in Michigan hospitals.  

PubMed

All 188 acute-care hospitals in Michigan with licensed pharmacies were surveyed to assess compliance with recommendations of ASHP, FDA, and the Joint Commission on Accreditation of Healthcare Organizations related to investigational drug use; other practice issues related to investigational drugs but not covered in those guidelines were also studied. Pharmacy directors were questioned about their practices for approving, prescribing, procuring, storing, and labeling investigational drugs; preparation, content, and use of investigational drug data sheets; record keeping; personnel issues; and other investigational drug services provided by the pharmacy department. The response rate was 84.5% (159 completed questionnaires returned), but only 44 respondents (27.7%) indicated that investigational drugs were currently used in their institutions. Written investigational drug policies and procedures were available in 116 (73.0%) of the responding pharmacy departments. Respondents currently handling investigational drugs had high rates of adherence for the following practice guidelines: preparation of data sheets (75.0%), storage (97.7%), monitoring of investigational drug use and stock levels (79.5%), and maintaining perpetual inventories (79.5%). Areas with relatively poor adherence rates included pharmacy department preparation of investigational drug patient-information sheets (20.5%), maintaining information within the pharmacy on minimum stock levels (53.9%), mode of shipment (30.8%), time to receive investigational drugs after order placed (38.5%), acceptance of nursing transcriptions of oral orders (56.8%), including "investigational drug" on the dispensing label (55.8%), and approval of data sheets by the investigator and the institutional review board (40.5% and 37.8%, respectively). Pharmacy departments, regardless of hospital size, should improve their adherence to ASHP, FDA, and Joint Commission guidelines for handling investigational drugs. PMID:2757042

Cohen, I A; Foote, M L; Kirking, D M; Tankanow, R M; Conlon, P F

1989-07-01

382

Criminal Profile Construction and Investigative Procedures  

Microsoft Academic Search

This chapter deals with the development and construction of a criminal profile. The integration of a psychological profile\\u000a with an ongoing investigation is discussed in the context of a multiple child serial murder investigation. The importance\\u000a of teamwork involving various members of a homicide task force and the independent skills they bring to an investigation is\\u000a emphasized. Psychodynamic factors are

Ronald Turco

383

Postgraduate Medical Education Clinician Investigator Program (CIP)  

E-print Network

1 Postgraduate Medical Education Clinician Investigator Program (CIP .................................................4 1.2.1 Medical Research Expert.6 ACADEMIC SESSIONS AND ETHICS TRAINING ..................................................................10

Hitchcock, Adam P.

384

Advanced Propulsion Physics Lab: Eagleworks Investigations  

NASA Technical Reports Server (NTRS)

Eagleworks Laboratory is an advanced propulsions physics laboratory with two primary investigations currently underway. The first is a Quantum Vacuum Plasma Thruster (QVPT or Q-thrusters), an advanced electric propulsion technology in the development and demonstration phase. The second investigation is in Warp Field Interferometry (WFI). This is an investigation of Dr. Harold "Sonny" White's theoretical physics models for warp field equations using optical experiments in the Electro Optical laboratory (EOL) at Johnson Space Center. These investigations are pursuing technology necessary to enable human exploration of the solar system and beyond.

Scogin, Tyler

2014-01-01

385

40 CFR 68.60 - Incident investigation.  

Code of Federal Regulations, 2010 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Program 2 Prevention Program § 68.60 Incident investigation. (a) The owner or operator shall...

2010-07-01

386

40 CFR 68.81 - Incident investigation.  

Code of Federal Regulations, 2010 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Program 3 Prevention Program § 68.81 Incident investigation. (a) The owner or operator shall...

2010-07-01

387

Immigrant Studies: Investigating Our Heritage. User's Guide.  

ERIC Educational Resources Information Center

Using a variety of learning activities and primary sources, elementary and secondary students investigate family and community history and ethnicity. The major goals of the units are to provide factual information about immigrants to America from about 1820 to 1920 and to assist students in investigating immigrant history and heritage in their…

Wagner, Sherri; Wagner, Kenneth

388

The Enhanced Digital Investigation Process Model  

Microsoft Academic Search

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

Venansius Baryamureeba; Florence Tushabe

2004-01-01

389

THE ELECTRICAL RESISTIVITY METER IN FISHERY INVESTIGATIONS  

E-print Network

THE ELECTRICAL RESISTIVITY METER IN FISHERY INVESTIGATIONS I Marine Biological Laboratory! WOODS RESISTIVITY METER IN FISHERY INVESTIGATIONS By Robert E. Lennon Fishery Research Biologist Appalachian Sport) BiblioKiMpliy : p. ]!. 1. Electric meters. 2. Water--Analysis. 3. Electric fishing. I. Title. ( Series

390

Shipboard investigations with selected fuels of tomorrow  

Microsoft Academic Search

This paper describes a 2 1\\/2 year project to investigate both short and long term effects that extreme marine residual fuel qualities could have on shipboard handling, preparation and engine performance. The investigations were carried out on a 44800 T deadweight ''LASH'' vessel, powered by a Sulzer 9RND90 two-stroke crosshead diesel engine. 15 refs.

G. J. Hellingman; S. Barrow

1982-01-01

391

Investigating Variables : Passengers Supported by Lifeboats  

NSDL National Science Digital Library

Short description This activity is a lab investigation where students develop an investigable inquiry question, construct a fleet of boats, collect data about how many passengers (pennies) each will hold before sinking, interpret their findings, and will share methods and results during a poster session.

392

Stanford University Sponsor-Investigator Research Requirements  

E-print Network

submission of amendments, annual and final reports · Timely submission of reports (adverse events and others) · Serious, unexpected adverse experience associated with the use of the drug o Written reports (no later the investigational drug is administered or dispensed. Investigational New Drug (IND): A drug permitted by the FDA

Puglisi, Joseph

393

DNA Barcoding Investigations Bring Biology to Life  

ERIC Educational Resources Information Center

This article describes how DNA barcoding investigations bring biology to life. Biologists recognize the power of DNA barcoding not just to teach biology through connections to the real world but also to immerse students in the exciting process of science. As an investigator in the Program for the Human Environment at Rockefeller University in New…

Musante, Susan

2010-01-01

394

76 FR 45168 - Rules Relating to Investigations  

Federal Register 2010, 2011, 2012, 2013, 2014

...applicable provisions of law. This section implements...civil investigative demands described in section...comply with such demands. Moreover, ensuring...consumer financial law ultimately benefits...the provisions of law applicable to such...Civil investigative demands. (a) In...

2011-07-28

395

77 FR 39101 - Rules Relating to Investigations  

Federal Register 2010, 2011, 2012, 2013, 2014

...Federal consumer financial law, issue in writing, and...a civil investigative demand.'' The language...Federal consumer financial law'' refers to the institution...and the provisions of law applicable to such violation...6 Civil investigative demands. (a) In general....

2012-06-29

396

Investigations in Life Science, Junior High.  

ERIC Educational Resources Information Center

Developed for teachers of junior high school science classes, this unit presents ten investigations on plant growth, animal life, pond life, and general science interests. These investigations are designed to accompany any popular life science textbooks, may be used to supplement a year-long course in life science, are intended as a springboard…

Stephenson, Robert L.

397

Cancer Cluster Investigation in a School District.  

ERIC Educational Resources Information Center

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…

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

1997-01-01

398

Teaching Adult Students Mathematical Investigations-6.  

ERIC Educational Resources Information Center

Teaching Adult Students Mathematical Investigation is based on the continuing research work carried out for the last ten years of teaching on the Foundation Course in Mathematics at Goldsmiths, University of London. Teaching Mathematical Investigation to adult students is a very challenging and often rewarding experience for adult educators as…

Angiama, R. O.

399

The Locust Jump: An Integrated Laboratory Investigation  

ERIC Educational Resources Information Center

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…

Scott, Jon

2005-01-01

400

Investigations: A Mathematical Cornucopia of Pumpkins  

NSDL National Science Digital Library

This 11-page article presents a hands-on, open-ended activity from "Investigations", a regular feature of Teaching Children Mathematics. The activity focuses on teaching data analysis and algebra through measuring the attributes of pumpkins. The four-day investigation is discussed through lesson plans and support resources.

Gebhard, Glenn

2006-09-01

401

Earth Control and Investigations: Training Course 1974.  

ERIC Educational Resources Information 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)

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

402

Investigation of microwave antennas with improved performances  

Microsoft Academic Search

This dissertation presents the investigation of antennas with improved performances at microwave frequencies. It covers the following three topics: the study of the metamaterial with near-zero index of refraction and its application in directive antenna design, the design technique of a wideband circularly polarized patch antenna for 60GHz wireless application and the investigation of a novel direction of arrival (DOA)

Rongguo Zhou

2010-01-01

403

AN INVESTIGATION OF DATA COMPRESSION TECHNIQUES FOR  

E-print Network

AN INVESTIGATION OF DATA COMPRESSION TECHNIQUES FOR HYPERSPECTRAL CORE IMAGER DATA Kerry-Anne Cawse investigate algorithms for tractable analysis of real hyperspec- tral image data, from core samples provided. In the case of the AngloGold Ashanti Hyperspectral Core Imager (HCI), however, one metre of core generates 250

Damelin, Steven

404

Earth Control and Investigations, Training Course 1972.  

ERIC Educational Resources Information Center

Compiled in this notebook is material from an Earth Control and Investigations Course offered by the Earth Science Branch of the Division of General Research, Engineering and Research Center, Denver, Colorado. The training is designed to promote consistency and uniformity in control and investigation procedures throughout the Bureau of…

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

405

Human Factors in Cabin Accident Investigations  

NASA Technical Reports Server (NTRS)

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.

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

1996-01-01

406

Investigating mesoscopic circuits with entangled state representations  

NASA Astrophysics Data System (ADS)

By employing the continuous parameter entangled state representations, we investigate the energy level and the wave function for a capacitively and mutual-inductively coupled LC mesoscopic circuit. It is found that investigating the mesoscopic circuit in such representations can bring us the following conveniences. Firstly, the dynamical equation is naturally transformed into a single-variable differential equation. Secondly, the center-of-mass kinetic energy is included in the energy level of the system. Thus it is instructive to introduce the entangled state representation into the investigation of mesoscopic circuits.

Liang, Bao-Long; Wang, Ji-Suo; Meng, Xiang-Guo; Yang, Qin-Ying

2013-01-01

407

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2014 CFR

...investigations. 2638.503 Section 2638.503 Administrative Personnel OFFICE OF GOVERNMENT ETHICS GOVERNMENT ETHICS OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective and Remedial Action in...

2014-01-01

408

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2013 CFR

...investigations. 2638.503 Section 2638.503 Administrative Personnel OFFICE OF GOVERNMENT ETHICS GOVERNMENT ETHICS OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective and Remedial Action in...

2013-01-01

409

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2011 CFR

...investigations. 2638.503 Section 2638.503 Administrative Personnel OFFICE OF GOVERNMENT ETHICS GOVERNMENT ETHICS OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective and Remedial Action in...

2011-01-01

410

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2012 CFR

...investigations. 2638.503 Section 2638.503 Administrative Personnel OFFICE OF GOVERNMENT ETHICS GOVERNMENT ETHICS OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective and Remedial Action in...

2012-01-01

411

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2010 CFR

...investigations. 2638.503 Section 2638.503 Administrative Personnel OFFICE OF GOVERNMENT ETHICS GOVERNMENT ETHICS OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective and Remedial Action in...

2010-01-01

412

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 ...

413

Investigation of thermal conductivity of liquid freons  

Microsoft Academic Search

The temperature dependence of the thermal conductivity of five liquid freons is experimentally investigated. An empirical relation for generalization of the obtained data is offered. The thermal conductivity of liquid Freons 11, 21, 114, and 115 is calculated.

O. B. Tsvetkov

1965-01-01

414

Inspection Date Performed by: Principal Investigator  

E-print Network

Inspection Date Performed by: Principal Investigator 01BIO Biological Safety Biological safety issue00001[ ] Improper work in biosafety cabinet00002[ ] Biohazardous waste overfilled00003[ ] Sharps on lab bench00008[ ] Sharps disposal issue00009[ ] 02CHM Chemical Safety Chemical safety issue

Sura, Philip

415

Investigations in Marine Chemistry: Tide Pool Ecology.  

ERIC Educational Resources Information Center

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)

Schlenker, Richard M.

416

Investigating Plant Physiology with Wisconsin Fast Plants  

NSDL National Science Digital Library

The activities and backgroundinformation in this booklet are designed to support investigations into three primary areas of plant physiology (how plants function): Nutrition, Tropism, and Hormone Response (using gibberellin).

The Wisconsin Fast Plants Program

417

Investigations of Anomalous Earthquakes at Active Volcanoes.  

E-print Network

??This dissertation investigates the link between volcanic unrest and the occurrence of moderate-to-large earthquakes with a specific type of focal mechanism. Vertical compensated-linear-vector-dipole (vertical-CLVD) earthquakes… (more)

Shuler, Ashley Elizabeth

2012-01-01

418

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2010 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION BUY AMERICA REQUIREMENTS § 661.15 Investigation...bidder or offeror who has submitted the required Buy America certificate is complying with the Buy America provision. A false certification...

2010-10-01

419

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2013 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION BUY AMERICA REQUIREMENTS § 661.15 Investigation...bidder or offeror who has submitted the required Buy America certificate is complying with the Buy America provision. A false certification...

2013-10-01

420

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2014 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION BUY AMERICA REQUIREMENTS § 661.15 Investigation...bidder or offeror who has submitted the required Buy America certificate is complying with the Buy America provision. A false certification...

2014-10-01

421

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2012 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION BUY AMERICA REQUIREMENTS § 661.15 Investigation...bidder or offeror who has submitted the required Buy America certificate is complying with the Buy America provision. A false certification...

2012-10-01

422

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2011 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION BUY AMERICA REQUIREMENTS § 661.15 Investigation...bidder or offeror who has submitted the required Buy America certificate is complying with the Buy America provision. A false certification...

2011-10-01

423

Mathematical Investigations Using Logo. Part Two.  

ERIC Educational Resources Information Center

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)

Brown, Ken

1986-01-01

424

10 CFR 1040.89-7 - Investigation.  

Code of Federal Regulations, 2010 CFR

...Director, Office of Civil Rights and Diversity, will review complaints that are unresolved...Director, Office of Civil Rights and Diversity. (4) The settlement shall not...Director, Office of Civil Rights and Diversity, will assign an Investigator to...

2010-01-01

425

INVESTIGATION Genomic Sequence Diversity and Population  

E-print Network

for biological research. The genetic diversity contained in the global population of yeast strains represents find diversity among these strains is principally organized by geography, with European, North AmericanINVESTIGATION Genomic Sequence Diversity and Population Structure of Saccharomyces cerevisiae

Fay, Justin

426

Generating Quasigroups: A Group Theory Investigation  

ERIC Educational Resources Information Center

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.

Lynch, Mark A. M.

2011-01-01

427

41 CFR 105-70.004 - Investigation.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Investigation. 105-70.004 Section 105-70.004 Public Contracts and Property Management ...Regional Offices-General Services Administration 70-IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL...

2010-07-01

428

24 CFR 28.15 - Investigation.  

Code of Federal Regulations, 2011 CFR

HUD may initiate a Program Fraud Civil Remedies Act (31 U.S.C. 3801) case against a respondent only upon an investigation by the Inspector General or his or her designee. (b) Subpoena. Pursuant to 31...

2011-04-01

429

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.

430

PRISE: petroleum resource investigation summary and evaluation  

E-print Network

analysis and assessment of the new methodology. We developed a methodology we call PRISE, which uses software that investigates relationships among data published for both conventional and unconventional resources in the seven mature U.S. basins. PRISE...

Old, Sara

2008-10-10

431

Chemical Reactions: Investigating Exothermic and Endothermic Reactions  

NSDL National Science Digital Library

This activity is an inquiry-based investigation where students discover the indicators of chemical reactions (endothermic and exothermic) by collecting data and using that data to develop a testable question for further experimentation.

432

Investigating Ecosystems: Determining Feeding Relationships among Organisms  

NSDL National Science Digital Library

This activity is a field investigation in which students identify organisms and their energy sources. Students collect data and create a food web that explains how the organisms in their ecosystem are related.

Anna Potvin, Pine City Secondary, Pine City, MN

433

45 CFR 689.6 - Investigations.  

Code of Federal Regulations, 2011 CFR

...Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION RESEARCH MISCONDUCT § 689.6 Investigations...these agencies or the NSF, OIG will determine what information, if any, may be disclosed to the subject of...

2011-10-01

434

45 CFR 689.6 - Investigations.  

Code of Federal Regulations, 2012 CFR

...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;...

2012-10-01

435

45 CFR 689.6 - Investigations.  

Code of Federal Regulations, 2014 CFR

...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;...

2014-10-01

436

45 CFR 689.6 - Investigations.  

Code of Federal Regulations, 2013 CFR

...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;...

2013-10-01

437

CPTAC Proteome Characterization Center Principal Investigators  

Cancer.gov

The following are the five Clinical Proteomic Tumor Analysis Consortium (CPTAC) teams, representing a network of seven Proteome Characterization Centers.  Teams are listed by grant title with their respective Principal Investigators: Cancer Proteomic

438

21 CFR 312.55 - Informing investigators.  

Code of Federal Regulations, 2010 CFR

...HEALTH AND HUMAN SERVICES (CONTINUED) DRUGS FOR HUMAN USE INVESTIGATIONAL NEW DRUG APPLICATION Responsibilities of Sponsors...by or reported to the sponsor on the drug, particularly with respect to adverse effects and safe use. Such...

2010-04-01

439

Glassy materials investigated for nuclear reactor applications  

NASA Technical Reports Server (NTRS)

Studies determine the feasibility of preparing fuel-bearing glasses and glasses bearing neutron-absorbing materials for use as crystalline fuel and control rods for reactors. Properties investigated were devitrification resistance, urania solubility, and density.

Lynch, E. D.

1968-01-01

440

17 CFR 200.66 - Investigations.  

Code of Federal Regulations, 2010 CFR

...exercise of the investigatory power, and no public pronouncement of the pendency of such an investigation should be made in the absence of reasonable evidence that the law has been violated and that the public welfare demand...

2010-04-01

441

INVESTIGATION OF BULK POWER ERCOT (Texas)  

E-print Network

INVESTIGATION OF BULK POWER MARKETS ERCOT (Texas) November 1, 2000 The analyses and conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 A. Electric Reliability Council of Texas (ERCOT) . . . . . . . . . . . . . . . . . . . . . . . . 4-2 B. The 1995 Texas Electricity Restructuring Statute

Laughlin, Robert B.

442

How Might You Investigate Scientific Phenomena  

NSDL National Science Digital Library

Exploring Earth Investigations are Internet-based activities that use animations, interactive graphics, and unique imagery to help students gather information about a particular Earth science theme, issue, or concept.

TERC (www.terc.edu)

443

49 CFR 107.305 - Investigations.  

Code of Federal Regulations, 2011 CFR

...Associate Administrator encourages voluntary production of documents in accordance with and...statements, photocopying, photography, and video- and audio-recording. (4) With...investigator may issue a subpoena for the production of documentary or other tangible...

2011-10-01

444

INVESTIGATION OF THE ORION RESEARCH AMMONIA MONITOR  

EPA Science Inventory

The Orion Research ammonia monitor was investigated using the Orion specifications and environmental considerations as a guide. Laboratory tests under controlled environmental conditions showed the electronic stability (drift) to be well within + or - 10 percent of reading over t...

445

75 FR 57472 - Clinical Investigator Training Course  

Federal Register 2010, 2011, 2012, 2013, 2014

...Programs, in cosponsorship with the Clinical Trials Transformation Initiative (CTTI...the conduct and/or design of clinical trials (clinical investigators...considerations involved in the conduct of clinical trials. DATES: The training...

2010-09-21

446

Mechanisms of superconductivity investigated by nuclear radiation  

NASA Technical Reports Server (NTRS)

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.

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

1967-01-01

447

ORIGINAL INVESTIGATION Tamoxifen disrupts consolidation and retrieval  

E-print Network

ORIGINAL INVESTIGATION Tamoxifen disrupts consolidation and retrieval of morphine # Springer-Verlag 2009 Abstract Rationale Tamoxifen (TMX), a selective estrogen receptor modulator, can might be prevented by E2 treatment. Keywords Memory. SERM . Tamoxifen . Estradiol . Morphine

Duchaine, Bradley C.

448

45 CFR 689.6 - Investigations.  

Code of Federal Regulations, 2010 CFR

...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;...

2010-10-01

449

Deer Lodge Valley investigations, western Montana  

SciTech Connect

A review of the geothermal investigations conducted in the Deer Lodge Valley of Western Montana is briefly presented. Maps of the generalized geology and Bouguer gravity and graphs of selected geothermal gradients and resistivity sounding profiles are presented. (MJF)

Wideman, C.J.; Sonderegger, J.; Crase, E.; Peterson, J.; Ruscetta, C.A. (ed.)

1982-07-01

450

Investigating packaging effects on bandgap references  

E-print Network

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 ...

Palakodety, Ravi (Ravi Kiran)

2007-01-01

451

7 CFR 966.72 - Investigation.  

Code of Federal Regulations, 2014 CFR

... AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE TOMATOES GROWN IN FLORIDA Order Regulating Handling Exemptions § 966.72 Investigation. The committee shall be...

2014-01-01

452

49 CFR 107.305 - Investigations.  

Code of Federal Regulations, 2012 CFR

...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...

2012-10-01

453

49 CFR 107.305 - Investigations.  

Code of Federal Regulations, 2013 CFR

...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...

2013-10-01

454

49 CFR 107.305 - Investigations.  

Code of Federal Regulations, 2014 CFR

...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...

2014-10-01

455

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.

456

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2010 CFR

...Section 556.4 Indians NATIONAL INDIAN GAMING COMMISSION, DEPARTMENT OF THE INTERIOR GAMING LICENSES AND BACKGROUND INVESTIGATIONS FOR...management official and for each key employee of a gaming operation. (a) A tribe shall...

2010-04-01

457

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2011 CFR

...Section 556.4 Indians NATIONAL INDIAN GAMING COMMISSION, DEPARTMENT OF THE INTERIOR GAMING LICENSES AND BACKGROUND INVESTIGATIONS FOR...management official and for each key employee of a gaming operation. (a) A tribe shall...

2011-04-01

458

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2012 CFR

...Section 556.4 Indians NATIONAL INDIAN GAMING COMMISSION, DEPARTMENT OF THE INTERIOR GAMING LICENSES AND BACKGROUND INVESTIGATIONS FOR...management official and for each key employee of a gaming operation. (a) A tribe shall...

2012-04-01

459

Investigation of laser polarized xenon magnetic resonance  

NASA Technical Reports Server (NTRS)

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.

Walsworth, Ronald L.

1998-01-01

460

A geologic investigation of Longhorn Cavern  

E-print Network

Major Subject: Geology A GEOLOGIC INVESTIGATION OF LONGHORN CAVERN A Thesis by VICTORIA LYNN WALTERS Approved as to style and content by: Christ pher C. Mathewson (Chair of Committee) Wy M Ah (Member) J. R. Giardino (Member) John H. Spang... (Head of Department) December 1992 ABSTRACT A Geologic Investigation of Longhorn Cavern. (December 1992) Victoria Lynn Walters, B. S. , Stephen F. Austin State University Chair of Advisory Committee: Dr. Christopher C. Mathewson Longhorn Cavern...

Walters, Victoria Lynn

1992-01-01

461

The SIR-B science investigations plan  

NASA Technical Reports Server (NTRS)

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.

1984-01-01

462

Cancer Prevention and Control Investigators Workshop  

Cancer.gov

The purpose of the Cancer Prevention and Control Investigators Workshop is to convene key investigators from each of the Community Clinical Oncology Program's (CCOP) Research Bases to outline the National Cancer Institute's (NCI) expanded focus for cancer control and prevention research for the future. The expanded focus resulted from the yearlong deliberation of the CCOP Strategic Issues and Priorities, which have been approved by the Board of Scientific Advisors and the NCI Scientific Program Leadership Group.

463

Radio science investigations with Mars Observer  

Microsoft Academic Search

Mars Observer radio science investigations focus on two major areas of study: the gravity field and the atmosphere of Mars. Measurement accuracies expressed as an equivalent spacecraft velocity are expected to be of the order of 100 microns\\/s (for both types of investigations) from use of an improved radio transponder for two-way spacecraft tracking and a highly stable on-board oscillator

G. L. Tyler; Georges Balmino; David P. Hinson; William L. Sjogren; David E. Smith; Richard Woo; Sami W. Asmar; Michael J. Connally; Carole L. Hamilton; Richard A. Simpson

1992-01-01

464

Investigation of paramagnetic response of metallic epoxies  

NASA Technical Reports Server (NTRS)

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.

Ash, R. L.; Chegini, H.

1986-01-01

465

A rheological investigation of vesicular rhyolite  

Microsoft Academic Search

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

N. Bagdassarov; D. B. Dingwell

1992-01-01

466

Geologic investigations of outer planets satellites  

NASA Technical Reports Server (NTRS)

Four tests are examined: (1) investigation of volcanism on Io; Interim results of thermal and structural modeling of volcanism on Io are presented, (2) a study of the ancient heavily cratered regions on Ganymede, (3) a geologic comparison of the cratering record on Ganymede and Callisto, and (4) a geological and chemical investigation of internal resurfacing processes on the Saturnian satellites. Tasks 2, 3, and 4 utilize Voyager imaging data.

Strom, R. G.

1984-01-01

467

Injury and Illness Prevention Programs Investigation of Accidents, Injuries and Illnesses INVESTIGATION OF ACCIDENTS,  

E-print Network

Injury and Illness Prevention Programs Investigation of Accidents, Injuries and Illnesses 1 INVESTIGATION OF ACCIDENTS, INJURIES AND ILLNESSES AG TOOL 1 I. Purpose Investigations are conducted to find out the cause of accidents, injuries and illnesses, and to prevent similar events from happening in the future

Leistikow, Bruce N.

468

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

Microsoft Academic Search

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

Paul Hunton

2011-01-01

469

21 CFR 312.40 - General requirements for use of an investigational new drug in a clinical investigation.  

Code of Federal Regulations, 2011 CFR

...requirements for use of an investigational new drug in a clinical investigation. 312... DRUGS FOR HUMAN USE INVESTIGATIONAL NEW DRUG APPLICATION Administrative Actions...requirements for use of an investigational new drug in a clinical investigation....

2011-04-01

470

21 CFR 312.40 - General requirements for use of an investigational new drug in a clinical investigation.  

Code of Federal Regulations, 2010 CFR

...requirements for use of an investigational new drug in a clinical investigation. 312... DRUGS FOR HUMAN USE INVESTIGATIONAL NEW DRUG APPLICATION Administrative Actions...requirements for use of an investigational new drug in a clinical investigation....

2010-04-01

471

Cyber Forensics Ontology for Cyber Criminal Investigation  

NASA Astrophysics Data System (ADS)

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.

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

472

Where Do I Start (Beginning the Investigation)?  

NASA Astrophysics Data System (ADS)

No doubt some will open directly to this chapter, because your product is contaminated with an undesirable microbe, or perhaps you have been asked to do such an investigation for another company's facility not previously observed by you and naturally you want tips on how to find where the contaminant is getting into the product stream. This chapter takes the reader through the process of beginning the investigation including understanding the process including the production schedule and critically reviewing previously generated laboratory data. Understanding the critical control points and validity of their critical limits is also important. Scoping the extent of the problem is next. It is always a good idea for the factory to have a rigorously validated cleaning and sanitation procedure that provides a documented "sanitation breakpoint," which can be useful in the "scoping" process, although some contamination events may extend past these "break-points." Touring the facility is next wherein preliminary pre-selection of areas for future sampling can be done. Operational samples and observations in non-food contact areas can be taken at this time. Then the operations personnel need to be consulted and plans made for an appropriate amount of time to observe equipment break down for "post-operational" sampling and "pre-operational" investigational sampling. Hence the chapter further discusses preparing operations personnel for the disruptions that go along with these investigations and assembling the sampling team. The chapter concludes with a discussion of post-startup observations after an investigation and sampling.

Kornacki, Jeffrey L.

473

A European approach to clinical investigator training  

PubMed Central

A better education and training of clinical investigators and their teams is one of the factors that could foster the development of clinical research in Europe, a key objective of the Innovative Medicines Initiative (IMI). PharmaTrain (an IMI programme on training in medicines development), and European Clinical Research Infrastructures Network (ECRIN) have joined forces to address this issue. An advisory group composed of representatives of universities, pharmaceutical companies and other organisations met four times between June 2011 and July 2012. This resulted in a position paper proposing a strategy to improve and harmonize clinical investigator training in Europe, and including a detailed syllabus and list of learning outcomes. Major recommendations are the establishment of minimal and mutually recognized certification requirement for investigators throughout the EU and the creation of a European platform to provide a suitable course and examination infrastructure. PMID:24058345

Boeynaems, Jean-Marie; Canivet, Cindy; Chan, Anthony; Clarke, Mary J.; Cornu, Catherine; Daemen, Esther; Demotes, Jacques; Nys, Katelijne De; Hirst, Barry; Hundt, Ferdinand; Kassai, Behrouz; Kerpel-Fronius, Sandor; Kiessig, Lucy; Klech, Heinrich; Kraehenbuhl, Jean-Pierre; Lafolie, Pierre; Lucht, Martin; Niese, Detlef; Pauli-Magnus, Christiane; Peters, Barbara; Schaltenbrand, Ralf; Stockis, Armel; Stykova, Martina; Verheus, Nicolette; Klingmann, Ingrid

2013-01-01

474

Investigation of organic adhesives for hybrid microcircuits  

NASA Technical Reports Server (NTRS)

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.

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

1975-01-01

475

Laboratory investigation of constitutive property scaling behavior  

SciTech Connect

Because many constitutive rock properties must be measured at one scale but applied at another, scaling behavior is an issue facing many applied disciplines, including the petroleum industry. A research program has been established to investigate and a quantify scaling behavior through systematic physical experimentation, with the aim of developing and testing models that describe scaling behavior in a quantitative manner. Scaling of constitutive rock properties is investigated through physical experimentation involving the collection of gas-permeability data measured over a range of discrete scales. The approach is to systematically isolate those factors that influence property scaling and investigate their relative contributions to overall scaling behavior. Two blocks of rock, each exhibiting differing heterogeneity structure. have recently been examined. The two samples were found to yield different scaling behavior, as exhibited by changes in the distribution functions and semi-variograms. Simple models have been fit to the measured scaling behavior that are of similar functional form but of different magnitude.

Tidwell, V.C.

1994-10-01

476

Applying Machine Trust Models to Forensic Investigations  

NASA Astrophysics Data System (ADS)

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.

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

477

Procedures for ground-water investigations  

SciTech Connect

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.

Not Available

1989-09-01

478

Columbia Accident Investigation Board Report. Volume 3  

NASA Technical Reports Server (NTRS)

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.

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

2003-01-01

479

Wildlife health investigations: needs, challenges and recommendations  

PubMed Central

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

2013-01-01

480

Further investigation on drop size distribution measurement  

NASA Astrophysics Data System (ADS)

The extension of an investigation of an atomization drop-size distribution measurement to include the interaction of two sprays, the comparison of drop-size distribution data from an independent mode and Rosin-Rammler distribution fitting, the effect of air temperature on the drop-size measurement by a light scattering technique, and the relationship between obscuration and an atomizer fuel flow rate, is discussed. The apparatus, atomizer, and instrument are described. The results of the investigation of these aspects are presented and some further research needs are identified.

Zhao, Y. H.; Hou, M. H.; Chin, J. S.

1985-07-01

481

Investigation of sands subjected to dynamic loading  

E-print Network

INVESTIGATION OF SP&NDS SUBJECTED TO DTNAMIC LOADING A Tucsis By Gary N. Reeves Submitted to the Grad ate Coll Ee of the T xas AGM University in partial fulfillment of the requirements for the deEree of MASTER OF SCIPNCE AuBust 19G7 Major... Subject: Civil EnEineering LABORATORY INVESTIGATION OF SANDS SUBJECTED TO DYNAMIC LOADING A Thesis by Gary N. Reeves Approved as to style and content by: Chairman of Committee Head of Department Membe Me er August 1967 ACIINOWLEDGR&J. 'NTS I...

Reeves, Gary Neil

2012-06-07

482

Radar investigation of the Hockley salt dome  

E-print Network

: Geophysics RADAR INVESTIGATION OF THE HOCKLEY SALT DOME A Thesis by UAMES ANDREW HLUCHANEK A'pproved as to style and content by: (Head of Departme t ? Member) May 1. 973 ABSTRACT Radar investigation of the Hockley Salt Dome. . (Nay, 1973) James... Andrew Hluchanek, B. S. , Texas A&M University Directed by: Dr. Robert R. Unterberger Radar probing through salt was accomplished at 17 radar stations established in the United Salt Company mine at Hockley, Texas. The top of the salt dom is mapped...

Hluchanek, James Andrew

2012-06-07

483

Pore Formation and Mobility Investigation video images  

NASA Technical Reports Server (NTRS)

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.

2003-01-01

484

US Chemical Safety and Hazard Investigation Board  

NSDL National Science Digital Library

The US Chemical Safety and Hazard Investigation Board began operations in 1998 with the stated mission to promote the prevention of major chemical accidents at fixed facilities. The independent, scientific investigative agency's Web site contains historical and current data, reports, and other information on chemical accidents from around the nation. For example, on September 13, 2002, a chemical plant explosion occurred in Freeport, Texas, involving an explosion, fire, and release of chemicals to the environment. The entry contains which specific chemicals were involved and a brief report of the incident, as well as injury, containment, and other relevant information.

485

Investigation of disease risks in small areas.  

PubMed Central

The investigation of disease risks in small areas is complicated by many issues including data quality, the retrospective nature of the statistical testing, the problems of boundary definitions in time and space around a putative disease cluster, and the lack of generally accepted definitions of the key terminology. Routine data systems have revolutionised the initial investigation of disease risks near sources of environmental pollution, although problems of data analysis and interpretation remain. This is especially true of unmeasured socioeconomic confounding, which could generate apparent positive results near a pollution source. PMID:8563839

Elliott, P

1995-01-01

486

Photochemical investigation of sensitizers used in medicine  

NASA Astrophysics Data System (ADS)

In this work we present the photophysical and photochemical investigation of the same sensititizers used in phototherapy. On an example water-soluble phthalocyanines of zinc some laws of influence of structure on the spectral characteristics and condition of dye in a solution are investigated. The quantum chemistry method of intermediate neglect of differential overlap with spectroscopic parameterization is used to study the spectroscopic- luminescent and physical characteristics of other sensitizers-psoralen, its isomers and metoxysubstitutes. Efficient intersystem conversion, which cause significant population of triplets, is observed for the examined compounds. Effects of isomerism and metoxysubstitution on the energy level diagram, photoelectron spectrum, and dipole moments are demonstrated.

Kovalskaya, Natalia E.; Sokolova, Irina V.; Kuznetsova, Nina A.

2001-08-01

487

Aberration-corrected HRTEM of defects in strained La 2 CuO 4 thin films grown on SrTiO 3  

Microsoft Academic Search

The structure of lattice defects in thin La2CuO4 films grown under tensile strain on SrTiO3 (001) is investigated by the combination of state-of-the-art medium voltage aberration-corrected transmission electron microscopy together with numerical exit-plane wavefunction reconstruction. The interfacial reconstruction, the coordination in planar shear defects evolving from surface steps and misfit dislocations of the b\\u000a  = a[010] type are atomically resolved and

Lothar Houben

2006-01-01

488

12 CFR 1080.4 - Initiating and conducting investigations.  

Code of Federal Regulations, 2014 CFR

...Initiating and conducting investigations. 1080.4 Section 1080...Banking BUREAU OF CONSUMER FINANCIAL PROTECTION RULES RELATING TO INVESTIGATIONS § 1080.4 Initiating and conducting investigations. The Assistant...

2014-01-01

489

12 CFR 1080.4 - Initiating and conducting investigations.  

Code of Federal Regulations, 2013 CFR

...Initiating and conducting investigations. 1080.4 Section 1080...Banking BUREAU OF CONSUMER FINANCIAL PROTECTION RULES RELATING TO INVESTIGATIONS § 1080.4 Initiating and conducting investigations. The Assistant...

2013-01-01

490

Using Ants to Investigate the Environment  

ERIC Educational Resources Information Center

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…

Hagevik, Rita A.

2005-01-01

491

Using Ants To Investigate the Environment.  

ERIC Educational Resources Information Center

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…

Hagevik, Rita A.

2003-01-01

492

Investigation of inhalation anthrax case, United States.  

PubMed

Inhalation anthrax occurred in a man who vacationed in 4 US states where anthrax is enzootic. Despite an extensive multi-agency investigation, the specific source was not detected, and no additional related human or animal cases were found. Although rare, inhalation anthrax can occur naturally in the United States. PMID:24447835

Griffith, Jayne; Blaney, David; Shadomy, Sean; Lehman, Mark; Pesik, Nicki; Tostenson, Samantha; Delaney, Lisa; Tiller, Rebekah; DeVries, Aaron; Gomez, Thomas; Sullivan, Maureen; Blackmore, Carina; Stanek, Danielle; Lynfield, Ruth

2014-02-01

493

INVESTIGATING THERMODYNAMICS OF VERTICAL ATMOSPHERIC ENERGY TRANSPORT  

E-print Network

INVESTIGATING THERMODYNAMICS OF VERTICAL ATMOSPHERIC ENERGY TRANSPORT Wei Wu and Yangang Liu National Laboratory P.O. Box, Upton, NY www.bnl.gov ABSTRACT Thermodynamics of vertical atmospheric energy. Potential thermodynamic constraint(s) for the Earth's climate system are also explored from these simple

494

Vulvar Melanocytic Nevi: A Dermoscopic Investigation  

Microsoft Academic Search

Background: Very few dermoscopic investigations into pigmented genital lesions have been performed to date. To the best of our knowledge, no dermoscopical description of vulvar melanocytic nevi (MN) has yet been proposed. Objective: Our aims were to analyze the dermoscopic features of vulvar MN and to review the literature of dermoscopy of the vulvar area. Methods: Among 74 women presenting

Annarosa Virgili; Maria Rosaria Zampino; Andrea Marzola; Monica Corazza

2010-01-01

495

The Microscope in Early Embryological Investigation  

Microsoft Academic Search

The microscope became an instrument of scientific investigation during the 17th century, its application leading to the discovery of the spermatozoa and profound changes in embryological thought. The severe optical limitations and consequent distrust of the microscope limited its use during the 18th century, but thereafter the instrument gradually improved. By the end of the 19th century, the instrument had

Charles W. Bodemer

1973-01-01

496

RESEARCH PROTOCOL SAFETY SURVEY PRINCIPAL INVESTIGATOR (PI)  

E-print Network

, biological safety cabinets, fume hoods, containment centrifuges, etc.) to be used in this research: DateRESEARCH PROTOCOL SAFETY SURVEY PRINCIPAL INVESTIGATOR (PI): PROJECT TITLE: DATE OF SUBMISSION of the following? a. Biological Hazards (Microbiological or viral agents, pathogens, toxins, or select agents

Karsai, Istvan

497

Investigating behavioral variability in web search  

Microsoft Academic Search

Understanding the extent to which people' s search behaviors differ in terms of the interaction flow and information targeted is important in designing interfaces to help World Wide Web users search more effectively. In this paper we describe a longitudinal log-based study that investigated variability in people' s interaction behavior when engaged in search-related activities on the Web. We analyze

Ryen W. White; Steven M. Drucker

2007-01-01

498

Occupational Clusters. Occupational Investigation Guide. First Edition.  

ERIC Educational Resources Information Center

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,…

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

499

INVESTIGATION The Limits to Parapatric Speciation  

E-print Network

INVESTIGATION The Limits to Parapatric Speciation: Dobzhansky­Muller Incompatibilities ABSTRACT How much gene flow is needed to inhibit speciation by the accumulation of Dobzhansky al. 2008 and Presgraves 2010). The appeal of the DMM is its generality: Speciation happens as a by

Buerger, Reinhard

500

LAUSD's Business Services Center. An Investigative Report.  

ERIC Educational Resources Information Center

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,…

Armoudian, Maria