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Last update: November 12, 2013.
1

Data Transmission over the Medium Voltage Power Line Communication Channel  

Microsoft Academic Search

This paper investigates the suitability of utilizing a medium voltage power line as a data communication channel. The channel can be modeled as having a time-varying, frequency-dependent, signal-to-noise ratio over the communication bandwidth. Other key factors presented in the channel model are attenuation and propagation delay. Simulation studies are used to test the suitability of the medium voltage power line

Poobalan Govender; Sunil Bipraj

2006-01-01

2

High Power Medium Voltage Electronic Load.  

National Technical Information Service (NTIS)

A Pulse Width Modulation (PWM) type, high power (2Kw) medium voltage (200V) electronic load suitable for operation as a stand alone instrument or as an integral part of a more complex test configuration is described. In stand alone operation, the load pow...

M. Martin H. J. N. Spruijt

1989-01-01

3

Study on automatic routing algorithm for medium voltage powerline communication  

Microsoft Academic Search

This paper gives the analysis of the feature of the medium voltage powerline communication in the view of reliability, investment and flexibility and the discussion of the necessity of routing automatically, compares the advantages and shortcomings of the bionic algorithms people research on a lot. It proposed an improved automatically dynamic routing algorithm for medium voltage powerline communication based on

Zhi-yuan Xie; Xiao-yan Wu; Jian-ning Liu; Zhen-gang Gong; Zheng-wei Hu

2012-01-01

4

Modified medium voltage arc flash incident energy calculation method  

Microsoft Academic Search

IEEE Standard 1584-2002 provides a guide for conducting arc-flash hazard analyses for low voltage and medium voltage systems. However, users need to be aware that the models in the guide were based on the measurements of arc incident energy under a specific set of test conditions combined with theoretical work. In the medium voltage arc flash analysis, the incident energy

Alex Y. Wu

2008-01-01

5

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

Code of Federal Regulations, 2010 CFR

...MINES Underground Low- and Medium-Voltage Alternating Current...Circuits § 75.902 Low- and medium-voltage ground check monitor...September 30, 1970, low- and medium-voltage resistance grounded systems shall include a...

2009-07-01

6

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

Code of Federal Regulations, 2010 CFR

...UNDERGROUND COAL MINES Low- and Medium-Voltage Alternating Current...Circuits § 77.902 Low- and medium-voltage ground check monitor...1971, three-phase low- and medium-voltage resistance grounded systems to portable and mobile...

2009-07-01

7

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

Code of Federal Regulations, 2010 CFR

...UNDERGROUND COAL MINES Low- and Medium-Voltage Alternating Current...Circuits § 77.902 Low- and medium-voltage ground check monitor...1971, three-phase low- and medium-voltage resistance grounded systems to portable and mobile...

2010-07-01

8

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

Code of Federal Regulations, 2010 CFR

...MINES Underground Low- and Medium-Voltage Alternating Current...Circuits § 75.902 Low- and medium-voltage ground check monitor...September 30, 1970, low- and medium-voltage resistance grounded systems shall include a...

2010-07-01

9

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

Code of Federal Regulations, 2010 CFR

...77.901 Protection of low- and medium-voltage three-phase circuits. (a) Low- and medium-voltage circuits supplying power...phase-to-phase voltage of the system. (c) Low- and medium-voltage circuits supplying...

2010-07-01

10

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

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Low- and medium-voltage ground check monitor circuits...OF UNDERGROUND COAL MINES Low- and Medium-Voltage Alternating Current Circuits § 77.902 Low- and medium-voltage ground check monitor...

2013-07-01

11

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

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Low- and medium-voltage ground check monitor circuits...STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.902 Low- and medium-voltage ground check monitor...

2013-07-01

12

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

13

Contactless energy transmission for an isolated 100W gate driver supply of a medium voltage converter  

Microsoft Academic Search

In this paper, an innovative DC-DC converter is investigated which provides electrical power to the gate driver units of medium voltage level converters. For the discussed DC-DC converter, a galvanic isolation (isolation voltages of up to 35 kV) is required. This electrical isolation is achieved with a coreless transformer in order to obtain a cost-effective solution. Furthermore, the DC-DC converter

R. Steiner; P. K. Steimer; F. Krismer; J. W. Kolar

2009-01-01

14

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

15

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

16

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

Code of Federal Regulations, 2010 CFR

...2009-07-01 false Protection of low- and medium-voltage three-phase circuits. 77...OF UNDERGROUND COAL MINES Low- and Medium-Voltage Alternating Current Circuits § 77.901 Protection of low- and medium-voltage three-phase circuits....

2009-07-01

17

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

Code of Federal Regulations, 2013 CFR

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

2013-07-01

18

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

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Protection of low- and medium-voltage three-phase circuits. 77...OF UNDERGROUND COAL MINES Low- and Medium-Voltage Alternating Current Circuits § 77.901 Protection of low- and medium-voltage three-phase circuits....

2013-07-01

19

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

Code of Federal Regulations, 2010 CFR

...Underground Low- and Medium-Voltage Alternating...900 Low- and medium-voltage circuits...Provisions] Low- and medium-voltage power circuits serving...suitable circuit breakers of adequate interrupting...maintained as prescribed by the Secretary. Such...

2010-07-01

20

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

Code of Federal Regulations, 2010 CFR

...Underground Low- and Medium-Voltage Alternating...900 Low- and medium-voltage circuits...Provisions] Low- and medium-voltage power circuits serving...suitable circuit breakers of adequate interrupting...maintained as prescribed by the Secretary. Such...

2009-07-01

21

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

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Low- and medium-voltage circuits serving three-phase...STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.900 Low- and medium-voltage circuits serving...

2013-07-01

22

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

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Low- and medium-voltage circuits serving portable...OF UNDERGROUND COAL MINES Low- and Medium-Voltage Alternating Current Circuits § 77.900 Low- and medium-voltage circuits serving...

2013-07-01

23

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

24

Improvements in protection and commissioning of digital transformer relays at medium voltage industrial facilities  

Microsoft Academic Search

The application of multifunction digital relays to protect medium voltage power transformers has become a common industrial practice. Industrial transformers, unlike utility transformers, frequently use neutral grounding resistors to limit ground current during faults to 200-400A range on medium voltage systems. This paper will discuss why these types of transformers require sensitive ground differential protection. The paper will also discuss

Charles J. Mozina

2011-01-01

25

Improvements in protection and commissioning of digital transformer relays at medium voltage industrial facilities  

Microsoft Academic Search

The application of multifunction digital relays to protect medium voltage power transformers has become a common industrial practice. Industrial transformers, unlike utility transformers, frequently use neutral grounding resistors to limit ground current during faults to 200-400A range on medium voltage systems. This paper will discuss why these types of transformers require sensitive ground differential protection. The paper will also discuss

C. J. Mozina

2010-01-01

26

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

27

A Comparative Study of Medium-Voltage Power Converter Topologies for Plasma Torch Under Dynamic Operating Conditions  

Microsoft Academic Search

This paper compares several medium-voltage power conversion systems for plasma torch application. The thermal plasma torch rated for 3 MW, 2 kA with the physical size of 1 m long is selected. The dynamic characteristics of the dc arc in a plasma torch are investigated using advanced 3-D magnetohydrodynamics simulation. The arc voltage noise of plusmn10% due to the periodic

Yongsug Suh; Yongjoong Lee; Peter K. Steimer

2009-01-01

28

Calculated Sputtering and Atomic Displacement Cross-Sections for Applications to Medium Voltage Analytical Electron Microscopy.  

National Technical Information Service (NTIS)

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 disc...

C. R. Bradley N. J. Zaluzec

1987-01-01

29

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

Code of Federal Regulations, 2010 CFR

...2009-07-01 false Protection of low- and medium-voltage three-phase circuits used...STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.901 Protection of low- and medium-voltage three-phase circuits...

2009-07-01

30

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

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Protection of low- and medium-voltage three-phase circuits used...STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.901 Protection of low- and medium-voltage three-phase circuits...

2013-07-01

31

SCR self-supplied gate driver for medium-voltage application with capacitor as storage element  

Microsoft Academic Search

The resent increase in the application of medium-voltage variable-frequency drives and solid-state starters to AC motors has revived the idea of the SCR self-supplied gate driver (SSGD). This solution eliminates the need for an isolated power supply board or auxiliary power supply, with substantial savings in cost and space in medium-voltage applications. In this paper, the objective has been to

Dusan M. Raonic

2000-01-01

32

Modified Medium-Voltage Arc-Flash Incident Energy Calculation Method  

Microsoft Academic Search

The IEEE Standard 1584-2002 provides a guide for conducting arc-flash hazard analyses for low- and medium-voltage systems. Users, however, need to be aware that the models in the guide were based on the measurements of arc incident energy under a specific set of test conditions combined with theoretical work. In the medium-voltage arc-flash analysis, the incident energy calculation, according to

Alex Y. Wu

2010-01-01

33

Large scale broadband over powerline field trial on medium voltage overhead circuits  

Microsoft Academic Search

This paper presents the results of a large scale field trial conducted over a period of 18+ months for a broadband over powerline communications system in a medium voltage overhead distribution network. Specifically, this infrastructure was designed to provide high speed bi-directional communications for electric utility devices in an intelligent grid environment supporting voltage and current sensors, remote controlled pole

C. M. Arteaga; Y. J. Yang

2008-01-01

34

A field trial of medium voltage power line communication system for AMR and DAS  

Microsoft Academic Search

In this paper, a test field of high-data rate PLC using overhead medium voltage power line (MV BPLC) for applications to automatic meter reading (AMR) and distribution automation system (DAS) is introduced. It was established in Jeju island, Korea and 8.2 km long. For the MV BPLC, a MV coupler for BPLC with internal impedance matching transformer was developed. For

Dae-Eun Lee; Dong-Seok In; Jae-Jo Lee; Young-Jin Park; Kwan-Ho Kim; Ji-Tae Kim; Su-Goog Shon

2009-01-01

35

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

Microsoft Academic Search

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

C. R. Bradley; N. J. Zaluzec

1987-01-01

36

Some experience with SCR's self-powered gate driver system for medium voltage solid state starter  

Microsoft Academic Search

The objective of this work has been to propose a self-powered gate driver system for medium voltage solid state starters. This paper presents some experience with SCRs using the self-powered gate driver system (SPGDS), designed and used for starting and stopping large induction motors. The proposed system derives power for gating the SCR from energy stored in the snubber capacitors

Dusan Raonic; D. MacLennon; D. Rouard

1997-01-01

37

Development of Medium-Voltage Networks: General Layout of Electricity Supply Systems Serving Urban Areas.  

National Technical Information Service (NTIS)

The strategy for developing urban medium-voltage networks can only be based on trends of a general nature, because of the diversity of situations and layouts already in existence. The author defines these trends with regard to bulk-supply substations, the...

D. Thibon

1982-01-01

38

Standing on one leg: The modernization of a medium voltage distribution system  

Microsoft Academic Search

The modernization of a plant's medium voltage distribution system to accommodate new and existing loads is discussed. Among the various problems solved was that of providing power for continuous process operation during the utility company's concurrent upgrade of the purchase power facilities. How this was accomplished by means of a technique called `standing on one leg' is described. Also addressed

J. L. Recchiuti; W. H. Kuck; K. R. Banner

1992-01-01

39

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

Microsoft Academic Search

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

Marek Hger; Peter Bracink; Juraj Altus; A. Otc?ena?s?ova?

2010-01-01

40

Application of solid insulated materials on medium voltage switchgear of distribution lines  

Microsoft Academic Search

For medium voltage and high voltage class, SF6 gases are widely used for insulating materials for most of the switchgears at distribution lines because of its superior electrical insulating quality. However, this SF6 gas belongs to one of 6 greenhouse gases which have to be reduced each year by complying with the Kyoto's protocol signed in 1997. So many researches

Menglei Zheng; Ji Hoon Ma; Lyun Yu; Seog Won Lee; Young Geun Kim; Yang Seob Sin; Jong Heok Lee; Sung Yon Won

2010-01-01

41

Development of intelligent design and simulation platform for medium voltage circuit breakers  

Microsoft Academic Search

With the rapid development of electrical industry, the traditional design method of circuit breakers can not meet the requirement. In this paper, in order to accelerate the design period of medium voltage circuit breakers and improve the overall performance of them, an intelligent design and simulation platform has been developed. The software consists of four main modules: Module of evaluation

Yi Zhang; Guogang Zhang; Jie Wu; Weiguang Yuan; Yingsan Geng

2011-01-01

42

The Effects of Load Impedance, Line Length, and Branches in the BPLCTransmission-Lines Analysis for Medium-Voltage Channel  

Microsoft Academic Search

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

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

2007-01-01

43

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

NASA Astrophysics Data System (ADS)

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

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

2013-05-01

44

Modeling and analysis of common-mode voltages generated in medium voltage PWM-CSI drives  

Microsoft Academic Search

Common-mode voltages appear in pulse-width modulated current-source inverters (PWM-CSIs) drives due to the operating principles of the input rectifier and the output inverter. This paper presents the modeling and analysis of a medium voltage current-source inverter drive, using the Matlab software. Simulated results of the model are in close agreement with experimental waveforms obtained from an industrial AC drive, which

Jos Rodrguez; Luis Morn; Jorge Pontt; Ruben Osorio; Samir Kouro

2003-01-01

45

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

46

Broadband Transmission via Underground Medium-Voltage Power LinesPart II: Capacity  

Microsoft Academic Search

The end-to-end transfer function of three-phase underground medium-voltage broadband over power-lines (MV\\/BPL) cables with common shield and armor is determined based on a new exact version of the chain scattering matrix method. The various topologies of the underground MV grid are studied with regard to the spectral behavior of the end-to-end attenuation and to the respective capacity and are compared

Athanasios G. Lazaropoulos; Panayiotis G. Cottis

2010-01-01

47

Six-phase PMSG wind energy conversion system based on medium-voltage multilevel converter  

Microsoft Academic Search

A new power converter interface for permanent magnet synchronous generator (PMSG) based wind energy conversion systems (WECS) is presented in this paper. The converter stage is capable to stepup the low-voltage side of standard six-phase PMSG used in todays WECS to a medium-voltage grid side. The proposed converter is an hybrid back-to-back topology composed of two series connected three-phase voltage

Mario J. Duran; Samir Kouro; Bin Wu; Emil Levi; Federico Barrero; Salvador Alepuz

2011-01-01

48

Modeling and Simulation of Voltage Source ConverterMedium-voltage DC System for Stability Analysis  

Microsoft Academic Search

This article presents the modeling and simulation of a simple two-terminal and a multi-terminal voltage source converter based medium-voltage DC system, representing a simplified shipboard distribution network, for angular stability analysis. The control modes considered for the voltage source converter include the voltage control mode and the active and reactive power control schemes. The impact of these control modes on

Seetharama Rudraraju; Suresh C. Srivastava; Anurag K. Srivastava; Noel N. Schulz

2011-01-01

49

Transient recovery voltage considerations in the application of medium-voltage circuit breakers  

Microsoft Academic Search

Medium-voltage circuit breakers can fail to interrupt three-phase fault currents when power systems have transient recovery voltage (TRV) characteristics which exceed the rating of the circuit breaker. This paper examines the application of 13.8-kV generation and load switchgear for an oil refinery in which circuit parameters as originally designed would have exceeded the 13.8-kV circuit breakers' TRV ratings had corrective

David L. Swindler; Paul Schwartz; Paul S. Hamer; Stephen R. Lambert

1997-01-01

50

Medium voltage converter for permanent magnet wind power generators up to 5 MW  

Microsoft Academic Search

Wind turbines equipped with a permanent magnet excited synchronous generator have to be connected to the utility grid via a full-scale converter. Medium voltage technology tends to be more suitable for high power systems. The flexibility of full-scale converter-based systems allows easy adaptation to different grid requirements. In recent years the continuously increasing number of wind energy plants brought into

Alexander Faulstich; J. K. Stinke; Fritz Wittwer

2005-01-01

51

A modular multilevel PWM inverter for medium-voltage motor drives  

Microsoft Academic Search

This paper presents a modular multilevel PWM inverter for medium-voltage motor drives, focusing on its control method and operating performance. It is especially suitable for fans, blowers, pumps, and compressors, the load torque of which is proportional to a square of rotating speed. Particular attention is paid to dc-capacitor voltage fluctuation of each chopper-cell because it may affect the voltage

Makoto Hagiwara; Kazutoshi Nishimura; Hirofumi Akagi

2009-01-01

52

A Medium-Voltage Motor Drive With a Modular Multilevel PWM Inverter  

Microsoft Academic Search

This paper describes the control and operating performance of a modular multilevel PWM inverter for a transformerless medium-voltage motor drive. The inverter is prominent in the modular arm structure consisting of a cascaded stack of multiple bidirectional chopper-cells. The dominant ac-voltage fluctuation with the same frequency as the motor (inverter) frequency occurs across the dc capacitor of each chopper-cell. The

Makoto Hagiwara; Kazutoshi Nishimura; Hirofumi Akagi

2010-01-01

53

7Level Medium Voltage Inverter System with PWM Converter for Regenerating Operation  

Microsoft Academic Search

In medium voltage drives, no standard converter topology exists to feed induction motors. So far, various topologies have been introduced to overcome limited voltage capacity of power switching devices. In market, Neutral Point Clamped(NPC) 3-level drives and H-Bridge cascaded multi-level drives are the main stream at high voltage and large capacity inverter drives. Power module, in H-Bridge cascaded multi-level topology,

Kwang-Seob Kim; Byung-Ki Kwon; Byung-Hun Yang; Chang-Ho Choi

54

Medium-voltage adjustable-speed-drive retrofit of an existing eddy-current clutch extruder application  

Microsoft Academic Search

This paper describes a case study of replacing an eddy-current clutch with a modern medium-voltage adjustable-speed drive (ASD) for a 2250 hp extruder application. It covers key issues, justification, factory and field measurements of torque-speed profile from 0.5 to 60 Hz, as well power quality analysis. The paper reviews manufacturers' capability to build medium-voltage ASDs that produce very high and

Robert A. Hanna; Scott W. Randall

2000-01-01

55

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

NASA Astrophysics Data System (ADS)

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.

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

1987-08-01

56

Quantitative power quality and characteristic analysis of multilevel pulse width modulation methods in medium voltage high power industrial drives  

Microsoft Academic Search

The inherent low switching frequency in medium voltage (MV) alternating current (AC) industrial drives presents power quality and filter design challenges. In this paper, four multilevel pulse width modulation (PWM) methods: Phase Disposition (PD), Switching Loss Minimization (SLM), Selective Harmonic Elimination (SHE) up to 17 th and 29 th harmonics respectively are considered. The characteristics of long cable effects on

Kevin Lee; Geraldo Nojima

2011-01-01

57

Design and control of Series DC Active Filter (SDAF) for shipboard Medium-Voltage DC power system  

Microsoft Academic Search

Shipboard power system (SPS) can have either ac or dc distribution systems, or a c ombination of both ac and dc distribution systems. However, the Navy has identified Medium- Voltage DC (MVDC) as a long-term solution for electric power distribution to meet the high pow er density requirements in future shipboard power systems. Thyristor bridges are a v iable front-end

Hesam Mirzaee; Babak Parkhideh; Subhashish Bhattacharya

2011-01-01

58

Mechanical condition recognition of medium-voltage vacuum circuit breaker based on mechanism dynamic features simulation and ANN  

Microsoft Academic Search

A new research method is proposed for the medium-voltage (MV) vacuum circuit breaker's (CB's) mechanical condition monitoring, which combines the mechanism dynamic features simulation and mechanical condition recognition algorithm based on artificial neural networks (ANNs). This method includes three steps: First, the relations between eigenvalues and mechanical failures of a vacuum circuit breaker (CB) through simulation instead of measurement are

Mingzhe Rong; Xiaohua Wang; Wu Yang; Shenli Jia

2005-01-01

59

An Improved Network-Equivalent Method of Reliability Evaluation for Complex Medium-Voltage Distribution System Based on Feeder Partition  

Microsoft Academic Search

A method of reliability evaluation for complex medium-voltage distribution system based on simplified network model and network-equivalent is proposed in this paper. According to the topology of distribution system and the function of the protection device and the switch, a distribution network is divided into different zones, the distribution network based on electrical components is changed into a simplified network

Huijia Liu; Hanmei Hu

2009-01-01

60

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

Microsoft Academic Search

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

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

2000-01-01

61

Optical sensors for electrical elements of a medium voltage distribution network  

NASA Astrophysics Data System (ADS)

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

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

2012-03-01

62

Scattering Parameters-Based Channel Characterization and Modeling for Underground Medium-Voltage Power-Line Communications  

Microsoft Academic Search

Power-line communications (PLC) technologies rely on the power grid for data transmission. Since the communications channel is already deployed, this communication alternative is specially interesting for the power grid owner (i.e., the electrical utility). The medium-voltage (MV) distribution network, located after the last step-down electrical substation with typical levels from 6 to 25 kV, directly feeds large consumers and small

Ricard Aquilue; Miquel Ribo; Joan Ramon Regue; Joan Llus Pijoan; Germn Sanchez

2009-01-01

63

New medium voltage drive systems using three-level neutral point clamped inverter with high voltage IGBT  

Microsoft Academic Search

This paper presents a new range of medium voltage motor drives with a three-level neutral point clamped inverter using high-voltage IGBTs. Different line side converters are available, including a twelve pulse diode rectifier and an active front end converter in the same configuration as the inverter. Innovative features of the drive include series-connection of high-voltage IGBTs and a novel isolated

R. Sommer; A. Mertens; M. Griggs; H.-J. Conraths; M. Bruckmann; T. Greif

1999-01-01

64

A transformerless hybrid active filter using a three-level PWM converter for a medium-voltage motor drive  

Microsoft Academic Search

This paper presents a transformerless hybrid active filter integrated into a medium-voltage motor drive for energy savings. This hybrid filter is intended for harmonic-current mitigation of the three-phase diode rectifier used as the front end of the motor drive. It consists of a passive filter tuned to the seventh-harmonic frequency and an active filter using a three-level PWM converter. This

Hirofumi Akagi; Ryota Kondo

2009-01-01

65

Cabine primarie AT/MT dell'ENEL per l'alimentazione dei centri urbani. (ENEL high and medium voltage electrical substations for power supply to urban centers).  

National Technical Information Service (NTIS)

Modular high and medium voltage gas insulated electrical substations are being used by ENEL (Italian Electricity Board) to meet the specific needs of urban centers with special design and sizing constraints of a historical/architectural nature. This paper...

A. Bargigia C. Boatto A. Di Mario N. Fava S. Sciarra

1991-01-01

66

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

67

Use a less power low voltage IGBT converter to adjust speed of a full power medium voltage induction motor of fan or pump  

Microsoft Academic Search

To solve the difficulty of medium voltage variable frequency drive of fan or pump, a technique, rotor-side variable frequency drive (RVFD), is introduced that a less power (0.2-0.3P\\/sub N\\/) low voltage (<400 V) IGBT converter is used to adjust speed of a full power medium voltage (6-10 kV) motor. The features of the technique are: simple circuit, less large devices,

Chunjie Wang; Xiaoliang Ma

2004-01-01

68

Retrofit of fixed speed induction motors with medium voltage drive converters using NPC three-level inverter high-voltage IGBT based topology  

Microsoft Academic Search

This paper presents a solution to allow simple and risk-free retrofit of existing fixed speed induction motors with medium voltage adjustable speed drives to achieve attractive energy savings. The presented medium voltage adjustable speed drive consists of a twelve-pulse diode rectifier and a three-level neutral point clamped inverter using high-voltage IGBTs. Innovative features of the drive include series-connection of high-voltage

Benoit P. Schmitt; Rainer Sommer

2001-01-01

69

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

Microsoft Academic Search

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

Fei Wang

2000-01-01

70

The Effects of SF6-Cu Mixture on the Arc Characteristics in a Medium Voltage Puffer Gas Circuit Breaker due to Variation of Thermodynamic Properties and Transport Coefficients  

NASA Astrophysics Data System (ADS)

In a gas circuit breaker, metal vapor resulting from electrode erosion is injected into the arc plasma. The arc then burns in a mixture of SF6 and electrode vapor, which has properties significantly different from those of pure SF6. Thermodynamic properties and transport coefficients of thermal plasmas formed in SF6-copper vapor mixtures change as a function of temperature and pressure. The property that is mostly affected by the presence of copper is electrical conductivity, which is important in magnetohydrodynamic (MHD) analysis. In this study, the transport coefficients of SF6 in the presence of 10 percent copper are considered as the basis of MHD simulation. Comparisons are made between the results during arc formation for pure SF6 and SF6-Cu mixture in a medium voltage (MV) circuit breaker. According to the transport coefficients influenced by the SF6-Cu mixture, the distribution of the electric potential, temperature, electromagnetic force density and current density of the arc column are presented and discussed. Also, the arc stability and pinch effect near current zero with 3-D simulation are investigated, which is advantageous to improving the efficiency of arc plasma simulation.

Vahid, Abbasi; Ahmad, Gholami; Kaveh, Niayesh

2013-06-01

71

Medium VoltageHigh Power Converter Topologies Comparison Procedure, for a 6.6 kV Drive Application Using 4.5 kV IGBT Modules  

Microsoft Academic Search

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

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

2012-01-01

72

A method of reliability evaluation for complex medium-voltage distribution system based on simplified network model and network-equivalent  

Microsoft Academic Search

A method of reliability evaluation for complex medium-voltage distribution system based on simplified network model and network-equivalent is proposed in this paper. According to the topology of distribution system and the function of the protection device and the switch, a distribution network is divided into different zones, the distribution network based on electrical components is changed into a simplified network

Huijia Liu; Hanmei Hu; Jingguang Huang

2008-01-01

73

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

74

Advanced medium-voltage bidirectional dc-dc conversion systems for future electric energy delivery and management systems  

NASA Astrophysics Data System (ADS)

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 generation systems Furthermore, power electronics systems can provide additional intelligent energy management, grid stability and power quality capabilities. Medium-voltage isolated dc-dc converter will become one of the key interfaces for grid components with moderate power ratings. To address the demand of medium voltage (MV) and high power capability for future electric energy delivery and management systems, the power electronics community and industry have been reacting in two different ways: developing semiconductor technology or directly connecting devices in series/parallel to reach higher nominal voltages and currents while maintaining conventional converter topologies; and by developing new converter topologies with traditional semiconductor technology, known as multilevel converters or modular converters. The modular approach uses the well-known, mature, and cheaper power semiconductor devices by adopting new converter topologies. The main advantages of the modular approach include: significant improvement in reliability by introducing desired level of redundancy; standardization of components leading to reduction in manufacturing cost and time; power systems can be easily reconfigured to support varying input-output specifications; and possibly higher efficiency and power density of the overall system. Input-series output-parallel (ISOP) modular configuration is a good choice to realize MV to low voltage (LV) conversion for utility application. However, challenges still remain. First of all, for the high-frequency MV utility application, the low switching loss and conduction loss are must-haves for high efficiency, while bidirectional power flow capability is a must for power management requirement. To address the demand, the phase-shift dual-halfbridge (DHB) is proposed as the constituent module of ISOP configuration for MV application. The proposed ISOP DHB converter employs zero-voltage-switching (ZVS) technique combined with LV MOSFETs to achieve low switching and conduction losses under high frequency operation, and therefore high efficiency and high power density, and bidirectional power flow as well. Secondly, a large load range of high efficiency is desired rather than only a specific load point due to the continuous operation and large load variation range of utility application, which is of high importance because of the rising energy cost. This work proposes a novel DHB converter with an adaptive commutation inductor. By utilizing an adaptive inductor as the main energy transfer element, the output power can be controlled by not only the phase shift but also the commutation inductance, which allows the circulating energy to be optimized for different load conditions to maintain ZVS under light load conditions and minimize additional conduction losses under heavy load conditions as well. As a result, the efficiency at both light and heavy load can be significantly improved compared with the conventional DHB converter, and therefore extended high-efficiency range can be achieved. In addition, current stress of switch devices can be reduced. The theoretical analysis is presented and validated by the experimental results on a 50 kHz, 1 kW dc-dc converter module. Thirdly, input-voltage sharing and output-current sharing are critical to assure the advantages of the ISOP modular configuration. To solve this issue, an identically distributed control scheme is proposed in this work. The proposed control scheme, using only one distributed voltage loop to realize both input-voltage and output-current sharing, provides plug-and-play capability, possible high-level fault tolerance, and easy implementatio

Fan, Haifeng

75

Load rates of low voltage transformers and medium voltage profile assessments on a real distribution electric grid based on average Daily Load Profile (DLP) of a housing for a high penetration of plug-in hybrid electric vehicles (PHEVs)  

Microsoft Academic Search

This paper assesses the impact of PHEVs on a real medium voltage distribution electric grid based on average Daily Loads Profiles (DLPs) of a PHEV and of a housing. For three penetration rates, we show the important effects on load rates of low voltage transformers which compose the studied urban substation. Nevertheless, we demonstrate the robustness of medium voltage electric

H. Turker; A. Florescu; S. Bacha; D. Chatroux

2011-01-01

76

A Transformerless Hybrid Active Filter Using a Three-Level Pulsewidth Modulation (PWM) Converter for a Medium-Voltage Motor Drive  

Microsoft Academic Search

This paper presents a transformerless hybrid active filter integrated into a medium-voltage motor drive for energy savings. This hybrid filter is intended for line harmonic-current mitigation of the three-phase diode rectifier used as the front end of the motor drive. It is based on direct connection of a passive filter tuned to the seventh-harmonic frequency in series with an active

Hirofumi Akagi; Ryota Kondo

2010-01-01

77

SmartStretch technology. III. The impact of medium voltage stimulation and SmartStretch technology on sheep topside (m. semimembranosus) meat quality traits under commercial processing conditions.  

PubMed

This study evaluated the interaction between medium voltage electrical stimulation, SmartStretch stretching and ageing treatments on key meat quality traits of hot boned sheep m. semimembranosus. Medium voltage stimulation reduced initial pH (P<0.001), but did not impact on other meat quality traits. There was a significant interaction between stretch treatment and ageing (P<0.001) for shear force such that samples which were both stretched and aged were the most tender. Sarcomere length was significantly (P<0.001) increased by SmartStretch treatment. Control (no stretching) resulted in greater (P<0.05) cooking loss, but there was significantly less purge loss (P<0.05). The ratio 630/580 nm and a* colour values at 0 and 5 days decreased at a significantly (P<0.05) slower rate when SmartStretch was applied. Overall medium voltage stimulation did not inhibit the effectiveness of the SmartStretch treatment. The SmartStretch treatment provided significant improvement in tenderness and the potential to increase meat display time. PMID:22999000

Toohey, E S; van de Ven, R; Thompson, J M; Geesink, G H; Hopkins, D L

2012-08-31

78

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

79

The impact of new generation pre-dressing medium-voltage electrical stimulation on tenderness and colour stability in lamb meat.  

PubMed

Previous work identified that a large number of domestic lamb carcases processed in Australia do not meet the recommended pH/temperature window during chilling. New medium voltage electrical stimulation technology has been developed to alleviate this problem. This study used an optimised setting (800mA with a pulse width 0.5ms) to evaluate the effects on meat quality with a focus on tenderness and meat colour. In total 40 (electrically stimulated) and 40 (non electrically stimulated) lambs from 11 lots killed over 2 days were evaluated. There was a significant difference (P<0.05) between stimulation treatments for initial pH, rate of pH decline and the predicted temperature at pH 6.0. There was also a large difference in the number of carcases that met the recommended window (pH of 6.0, between 18 and 25C), with an average 67.5% of stimulated carcases and 25% of unstimulated carcases meeting or falling just above the recommended window. The stimulation treatment had no significant (P>0.05) effect on sarcomere length or myofibrillar fragmentation index (MFI) of the m. longissimus (LL). After 1day of ageing LL samples from stimulated carcases had a significantly lower (P<0.05) shear force than non stimulated samples, but there was no difference between stimulation treatments after 5 days ageing. However, ageing period did have a significant effect (P<0.001) on both MFI and shear force, such that 5days aged product had higher MFI and lower shear force values. There were minimal effects of stimulation on colour stability. PMID:22063030

Toohey, E S; Hopkins, D L; Stanley, D F; Nielsen, S G

2007-11-07

80

Asset Management of Medium Voltage Cable Networks  

Microsoft Academic Search

This paper describes the background to research currently underway associated with asset management (AM) of degraded cable\\u000a networks in North Queensland. In the paper the main failure mode of cables installed twenty years ago is identified as the\\u000a growth of water trees through the cable insulation. The costs of managing water tree degradation in a large distribution network\\u000a are considered

D Birtwhistle; R Gilbert; J Lyall; B Oyegoke; L Powell; T Saha

81

Medium voltage SF6 circuit-breaker arc model application  

Microsoft Academic Search

This paper presents an arc model used to evaluate the SF6 circuit-breaker interruption capacity on non-completely standardized conditions. A method is shown to calculate the arc parameters and their application on an electromagnetic transients program. Tests and simulations were carried out concerning transformer fed fault and short-line fault.

Lucilius Carlos Pinto; Luiz Cera Zanetta Jr

2000-01-01

82

Research of Noise Characteristics for 10kV Medium-Voltage Power Lines  

Microsoft Academic Search

This paper presents experimental research on the noise characteristics performed on 10-kV overhead power lines. The frequency range of interest is from 40 kHz to 2 MHz. The results show that: 1) The noise level of the 10-kV power networks depends on the power network structure, configuration, and loads. It is often higher than that of the low-voltage power networks.

Zheng Tao; Yang Xiaoxian; Zhang Baohui; Chen Jian; Yao Zhi; Tian Zhihong

2007-01-01

83

Thermal Effects of High-Frequency Voltage on Medium Voltage Cable Terminations  

Microsoft Academic Search

Field experiences have shown that transmission systems using voltage sourced converters (VSCs) with IGBT's can produce high frequency harmonic resonances in the VSC station environment. Modern cable terminations using non-geometric stress grading can be susceptible to degradation under these harmonics. In this study a setup was designed to test cable terminations under conditions representative of high frequency harmonic resonance in

Sarajit Banerjee; Shesha H. Jayaram

2007-01-01

84

A Series Connected Three-Level Inverter Topology For Medium Voltage Squirrel Cage Motor Drive Applications  

Microsoft Academic Search

The application of PWM voltages using two level high voltage inverters to a squirrel cage induction motor (SQIM) can cause high bearing currents, heating of rotor shaft, voltage spike across the motor terminals, etc. The increase in the number of steps of the motor voltage and hence decreasing the dv\\/dt applied to the machine terminals can be a solution to

Suvajit Mukherjee; Gautam Poddar

2008-01-01

85

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

86

Inhomogeneity effects in HTS coated conductors used as resistive FCLs in medium voltage grids  

NASA Astrophysics Data System (ADS)

For resistive fault current limiters (RFCLs) based on high temperature superconducting coated conductors (HTS-CCs), inhomogeneity, in terms of critical current and geometrical imperfections such as stabilizer and substrate thicknesses, plays a very important role and it may limit the penetration of such devices into the electrical market. This paper presents an electrothermal model, developed in SimPowerSystem, able to describe the transient response of HTS-CC candidates with different degrees of inhomogeneity, both in terms of critical current and of stabilizer thickness. Critical current inhomogeneity has been modeled with Gaussian distributions. The layer thicknesses used in the simulations have been chosen by fitting the temperature dependence of real tape resistances. Our approach considers relative inhomogeneity positions as well as thermal conduction along the HTS-CC length. The model is tuned using experimental measurements made on ReBaCuO coated conductors. A new dynamical thermal calibration of the model is proposed using finite element method calculations. Inhomegeneity effects with different possible faults (e.g. three phase and single phase short-circuit) are presented.

Colangelo, Daniele; Dutoit, Bertrand

2012-09-01

87

Development of improved methods for type testing present day medium voltage circuit breakers for outdoor service  

Microsoft Academic Search

Many of the standards for required fault current interrupting tests for circuit breakers rated at 15 to 72.5 kV were written for oil breakers or magnetically blasted air circuit breakers. In either case the interrupting medium which is produced by vaporizing, decomposing and ionizing the materials in the immediate vicinity of the arc is gas either mostly hydrogen for oil

S. B. Kuznetsov; H. E. Spindle

1993-01-01

88

Medium-voltage adjustable-speed drives-users' and manufacturers' experiences  

Microsoft Academic Search

Energy management and the efficient use of electricity are being promoted by most electric utilities in Canada and the USA. In some cases, cash incentives are being offered toward conducting feasibility studies and project implementation when the energy paybacks are attractive. This paper presents the results of a comprehensive study completed in July 1995 for a large Canadian electric utility,

Robert A. Hanna; Shiva Prabhu

1997-01-01

89

Tantalum Hybrid Capacitors - The Capacitors with the Highest Available Power Density in Medium Voltage Range  

Microsoft Academic Search

Tantalum Hybrid electrolytic\\/electrochemical capacitors are very versatile compo- nents, used in a wide variety of applications. This paper deals with pulse discharge characte- ristics measurement and specific power determination of these capacitors. Capacitors with ? 100 V rated voltage were chosen for the measurement. The capacitors were repetitively dis- charged into a low resistance load. More than 140 surge discharges

David ?espiva; Zuzana Kejkov

90

Bayesian Selectivity Technique for Earth Fault Protection in Medium-Voltage Networks  

Microsoft Academic Search

In Nordic countries, distribution networks are unearthed or compensated. Earth faults, particularly in compensated networks, provide fault currents that are low compared to the load currents. Identification of the faulty feeder is therefore difficult. A preliminary description of discrete wavelet transform (DWT)-Bayesian selectivity technique was introduced in reference 1 to identify the faulty feeder. It was dependent on a conditional

Nagy I. Elkalashy; Abdelsalam M. Elhaffar; Tamer A. Kawady; Naser G. Tarhuni; Matti Lehtonen

2010-01-01

91

Control and Performance of a Medium-Voltage Transformerless Cascade PWM STATCOM with Star-Configuration  

Microsoft Academic Search

This paper presents a three-phase transformerless cascade PWM STATCOM intended for installation on industrial and utility power distribution systems. It proposes a control method that devotes itself mainly to meeting a demand of reactive power, as well as to voltage-balancing of the multiple isolated and split dc capacitors. The control method is characterized by fast and stable voltage-balancing performance and

Tsurugi Yoshii; Shigenori Inoue; H. Akagi

2006-01-01

92

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

93

Development and test of a medium voltage converter for ocean observatories  

Microsoft Academic Search

Power system engineering for ocean observatories has been an active area of research and development for the past 10 years. A number of architectures have been reported and discussed, including AC systems, DC systems, constant-voltage systems, constant-current systems, and various series and parallel cable topologies. A sequence of engineering analyses and prototype experiments led the U.S. MARS and the Canadian

John Walrod; Joseph Key

2009-01-01

94

A new current relay for capacitors in medium voltage LC harmonic filters  

Microsoft Academic Search

Static LC filters are usually used in industrial installations in conjunction with generating harmonic loads, for instance arc furnaces, for voltage quality control. The filter is matched at some frequency between the third and the seventh harmonic, but currents wider spectrum of frequency will flow through the filter. Peak and rms voltages, each on individual capacitor will vary with harmonic,

M. T. Andrade

2004-01-01

95

The peculiarities of interruption of the medium voltage motors by VCB with CuCr contacts [vacuum circuit breakers  

Microsoft Academic Search

The Monte-Carlo simulation technique and appropriate software has been developed to analyze the switching overvoltages occurring at the interruption of 6 and 10 kV motors by vacuum circuit breakers (VCB) with CuCr contacts. VCB parameters have been determined experimentally. A comparison has been provided between VCB switching behaviour at the interruption of 6 and 10 kV motors. Voltage escalation has

Alexy M. Chaly; Alevtina T. Chalaya; Victor N. Poluyanov; Irina N. Poluyanova

1998-01-01

96

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

Code of Federal Regulations, 2010 CFR

...to subpart J of this part) or (iii) Between...to subpart J of this part) (3) Each three-phase output circuit of the generator must...specified in 30 CFR part 18, appendix I, table...listing the maximum circuit interrupting...

2010-07-01

97

The Performance of Strippable and Bonded Screened Medium-Voltage XLPE-Insulated Cables Under Long-Term Accelerated Aging  

Microsoft Academic Search

XLPE high-voltage underground cables are being extensively used in Arabian Gulf countries. Most of these cables are being manufactured locally. Although XLPE has excellent dielectric characteristics, extensive premature failures have been reported by the local power utilities. The main causes of such premature failures are related to manufacturing defects and insulation degradation mainly caused by water treeing phenomena. In this

A. Al-Arainy; Nazar H. Malik; Mohammed Iqbal Qureshi; Mohammed Nabih Al-Saati

2007-01-01

98

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

99

A sensitivity approach to the sizing of insulated power cables in low and medium voltage electrical power distribution systems  

Microsoft Academic Search

The sizing of insulated power cables for use in electrical power distribution systems is based on definite engineering criteria. Cable or conductor size for a given current loading (ampacity) is the cross-sectional area or size of the current carrying portion of the cable, namely the conductor expressed in AWG (American Wire Gauge) or KCM (Kilocircular mils). The most commonly used

A. K. Hiranandani

1989-01-01

100

A transformerless hybrid active filter for integration into a medium-voltage motor drive with a passive front end  

Microsoft Academic Search

This paper discusses a transformerless hybrid active filter integrated into the 6.6-kV, 1-MW adjustable-speed motor drive having a three-phase diode rectifier at the front end. The hybrid filter consists of an active filter using a three-level diode-clamped PWM converter rated at 60 kVA, and a 250-kVA passive filter tuned to the 7th-harmonic frequency. They are directly connected in series without

Hirofumi Akagi

2007-01-01

101

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

102

Investigating investigators: examining witnesses' influence on investigators.  

PubMed

This research examined the influence of eyewitness identification decisions on participants in the role of police investigators. Undergraduate "investigators" interviewed confederate "witnesses" and then searched a computer database of potential suspects. The database included information on each suspect's physical description, prior criminal record, alibi, and fingerprints. Participants selected a suspect and estimated the probability that the suspect was guilty. Investigators subsequently administered a photo lineup to the witness and re-estimated the suspect's guilt. If the witness identified the suspect probability estimates increased dramatically. If the witness identified an innocent lineup member or rejected the lineup, investigators' probability estimates dropped significantly, even when pre-lineup objective evidence (e.g., fingerprints) was strong. Performance of participants acting as witnesses in two baseline studies was at chance. Therefore, participant-investigators greatly overestimated the amount of information gain provided by eyewitness identifications. PMID:16741634

Dahl, Leora C; Lindsay, D Stephen; Brimacombe, C A Elizabeth

2006-12-01

103

Investigative Reporting.  

ERIC Educational Resources Information Center

|This book is devoted to investigative reporting. Chapters tell how to decide on a subject, how to find and evaluate sources, how to approach and interview the sources and the subject of the investigation, how to write the investigative story, how to insure that it gets published, and how to advance the aims of an investigation, even after the

Anderson, David; Benjaminson, Peter

104

Groundwater Investigations  

NSDL National Science Digital Library

Groundwater Investigations is a series of lessons designed to introduce and provide direct experience with physical and computational modeling in a practical scientific context. Each investigation explores basic concepts of the water cycle and pollutant transport within the unsaturated zone of the soil column.

Love, Garrett R.

105

Investigator Resources  

Cancer.gov

The Cancer Therapy Evaluation Program (CTEP) of the National Cancer Institute sponsors clinical trials of investigational agents within its Phase I and and Phase II clinical trials networks, as well as through the large Cooperative Groups.

106

Investigative Photography.  

National Technical Information Service (NTIS)

The report is directed toward arson investigators, fire protection consultants, engineers, metallurgists, or other technical specialists who could use photography as an adjunct to their reports and as a valuable aid in court. Cameras, light meters, electr...

E. R. Berrin

1977-01-01

107

Outbreak Investigations  

Center for Food Safety and Applied Nutrition (CFSAN)

Links to the Ongoing Investigations of the Coordinated Outbreak Response and Evaluation (CORE) Network sorted by year. More results from www.fda.gov/food/recalls,%20outbreaks%20&%20emergencies/outbreaks

108

Quaternary investigation  

SciTech Connect

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

Stieve, A.

1991-05-15

109

CAESAR investigations  

NASA Astrophysics Data System (ADS)

The Coordinate Auroral Experiment using Scatter And Rocket investigations was performed by combining high resolution in-situ measurements using rocket-borne instrumentation and ground-based observations with EISCAT. Magnetosphere/ionosphere interaction during discrete auroral arc conditions was studied by observing energetic charged particle distributions and electrodynamic processes as well as parameters of the ionospheric plasma associated with the arc. The electric and magnetic field configurations and the current systems related to the arc were investigated. Two identical payloads were built and launched with Skylark 12 motors from Andoya (Norway).

Rinnert, K.; Wilhelm, K.; Kohl, H.; Schlegel, K.; Dehmel, G.; Luehr, H.; Kloecker, N.; Oelschlaegel, W.; Gough, M. P.; Holback, B.

1987-08-01

110

Temperature Investigations  

NSDL National Science Digital Library

This guided inquiry activity uses a modified version of the Science Writing Heuristic to give undergraduate students an opportunity to refine their use of the scientific method and analytical skills while learning about the factors that influence a regions temperature. Student groups design three sets of experiments that investigate how temperature is affected by: 1) surface albedo; 2) sun angle; and 3) surface composition. For each investigation, the students must develop a research hypothesis, identify the corresponding variables, design and execute an experiment, analyze data, and communicate their ideas to their peers.

Gray, Kyle

111

Investigating Sleep  

NSDL National Science Digital Library

In this activity about sleep rhythms (on page 25 of the PDF), learners will investigate how changing the time they go to bed impacts their own sleep patterns. For one night, learners will go to bed one hour earlier than usual. They will observe and record any impacts that this change has on their abilities to fall asleep, and on their usual wake times the next morning. This lesson guide includes background information, setup and management tips, extensions and a handout.

Moreno, Nancy P.; Tharp, Barbara Z.; Vogt, Greg L.

2009-01-01

112

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.

2005-12-08

113

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.

114

A medium-voltage transformerless AC\\/DC power conversion system consisting of a diode rectifier and a shunt hybrid filter  

Microsoft Academic Search

This paper proposes a 3.3-kV transformerless AC-to-DC power conversion system consisting of a three-phase six-pulse diode rectifier and a shunt hybrid filter. The hybrid filter is formed by a single tuned LC filter per phase and a small-rated three-phase active filter, which are directly connected in series without any matching transformer. The required rating of the active filter is much

Sunt Srianthumrong; Hirofumi Akagi

2003-01-01

115

A medium-voltage transformerless AC\\/DC power conversion system consisting of a diode rectifier and a shunt hybrid filter  

Microsoft Academic Search

This paper proposes a 3.3-kV transformerless AC-to-DC power conversion system consisting of a three-phase six-pulse diode rectifier and a shunt hybrid filter. The hybrid filter is formed by a single tuned LC filter per phase and a small-rated three-phase active filter, which are directly connected in series without any matching transformer. The required rating of the active filter is much

Sunt Srianthumrong; Hirofumi Akagi

2002-01-01

116

Analysis of the fatigue causes on the rotor bars of squirrel cage asynchronous motors: experimental analysis and modelling of medium voltage motors  

Microsoft Academic Search

The rotor bars of squirrel cage asynchronous motors are subject to mechanical forces and electrical and thermal transient processes. During the transient operation of the machine, especially during its start up, the high values of current flowing through the cage produce small deformations in bar and end rings. These deformations, combined with the expansions and contractions caused by transient thermal

M. F. Cabanas; J. L. Ruiz Gonzalez; J. L. B. Sampayo; M. G. Melerot; C. H. Rojas; F. Pedrayes; A. Arguelles; J. Vina

2003-01-01

117

Investigator-Initiated Investigational New Drug (IND) ...  

Center for Drug Evaluation (CDER)

... Emergency Investigational New Drug (EIND) Applications for Antiviral Products; ... Investigator-Initiated Investigational New Drug (IND) Applications. ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

118

Investigations of induced currents in human bodies due to exposure to EMF from low voltage appliances  

Microsoft Academic Search

Extremely Low Frequency Electromagnetic Fields (ELF) due to low and medium voltages are normally low. But with the wide spread and increase in the use of electrical energy, the potential for exposure has increased considerably. Exposure to man made electrical appliances generally ranges from 15 V\\/m up to 100 V\\/m for electric fields and from 0.1 T to more than

A. Hossam-Eldin; K. Youssef; H. Karawia

2006-01-01

119

Federal Bureau of Investigation and Terrorism Investigations.  

National Technical Information Service (NTIS)

The Federal Bureau of Investigation (FBI, the Bureau) is the lead federal law enforcement agency charged with counterterrorism investigations. Since the September 11, 2001 (9/11) attacks, the FBI has implemented a series of reforms intended to transform i...

J. P. Bjelopera

2011-01-01

120

Hospital security investigations.  

PubMed

The author discusses the importance of investigation in the hospital setting and how to conduct a good investigation. A security investigation in the healthcare field, he says, may be quite different from one in law enforcement. PMID:11951391

Houston, Keith M

2002-01-01

121

INVESTIGATIVE IMAGE PROCESSING: THE WACO INVESTIGATION  

Microsoft Academic Search

This paper presents some of the the image processing tech- niques that were applied to seek an answer to the ques- tion whether agents of the Federal Bureau of Investigation (FBI) were shooting at Branch Davidian sect members in the tragic event in Waco, Texas, U.S., 1993. The \\

Lena Klasn

2001-01-01

122

Clinical Investigation Program.  

National Technical Information Service (NTIS)

Subject report identifies those individuals who are conducting investigative protocols at Tripler Army Medical Center. An abstract of each project giving abbreviated technical objectives, methods, and progress is presented. Investigations were conducted b...

S. A. Cucinell

1984-01-01

123

Investigational Adverse Experience Reporting  

Microsoft Academic Search

This discussion centers on the adverse experience reporting techniques and governmental requirements for investigational products (Phases I-III). The adverse experience reporting rate for investigational products has steadily increased over the past six years. To meet this increased reporting rate, the computer systems at Merck have become highly sophisticated. The specific governmental AE reporting requirements for investigational products of North America

Robert A. Michalak

1987-01-01

124

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

125

Manage equipment failure investigation  

SciTech Connect

Determining the cause of plant equipment failure may be relatively easy or it may involve complex laboratory testing and analysis. Given the variety of situations requiring plant equipment failure investigation, a systematic process for managing failure investigations is desirable. Guidelines and check lists are useful. Systematic execution of the recommendations and guidelines in this article should lead to successful and cost-effective failure investigations. A generic check list for executing the process is provided in Table 1 and a generic work scope for a failure investigation is provided in Table 2.

McHaney, J.H. [Metallurgical Consultants, Inc., Houston, TX (United States); Williamson, G.C. [ARCO Alaska, Inc., Anchorage, AK (United States)

1997-01-01

126

Research Divisions and Investigators  

Center for Drug Evaluation (CDER)

... Therapeutic Biological Research Divisions and Investigators Research Projects. Office of Biotechnology Products. Division of Monoclonal Antibodies ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

127

Investigating Encrypted Material  

NASA Astrophysics Data System (ADS)

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

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

128

Let's Investigate Mars  

NSDL National Science Digital Library

In this activity, students will formulate an original question based on recent Mars robotic investigations and design an original, collaborative inquiry investigation. They will then present their inquiry question and investigation to the class and revise the investigation based on feedback from the class. The activity is designed to accompany the Kids' Science News Network (KSNN) 21st Century Explorer 30-second news break entitled 'Why Do We Want to Study and Travel to Mars?' The activity includes a teacher's guide and instructions for students, and a Spanish translation is available.

129

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.

Gupta, Vishali; Gupta, Amod

2013-01-01

130

Istrazivacko novinarstvo (Investigative Journalism).  

ERIC Educational Resources Information Center

|Reports that the democratization of the political system establishes a special type of reporting: the "so-called" investigative journalism. Defines the basic characteristics of this type of journalism--states that the journalist conducts the investigation very thoroughly, using special techniques/methods. Sees the journalist's role as "watchdog"

Kosir, Manca

1995-01-01

131

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

132

Editor's Note: Investigation Skills  

NSDL National Science Digital Library

To borrow an idea from John Dewey, problem solving is both the method and purpose of education. Teaching investigation skills can help students move into understanding and applying content to solve real problems. Investigation skills must move from being seen as "supplemental" to core. The articles in this month's issue of Science and Children can help you to achieve this goal.

Ohana, Chris

2006-10-01

133

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 ArcViews 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

2007-01-01

134

Gear Crack Propagation Investigations.  

National Technical Information Service (NTIS)

Analytical and experimental studies were performed to investigate the effect of gear rim thickness on crack propagation life. The FRANC (FRacture ANalysis Code) computer program was used to simulate crack propagation. The FRANC program used principles of ...

D. G. Lewicki R. Ballarini

1996-01-01

135

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

136

Investigative Photography (Revised).  

National Technical Information Service (NTIS)

Directed toward arson investigators, fire protection consultants, engineers, metallurgists, or other technical specialists who could use photography as an adjunct to their reports and as a valuable aid in court. Cameras, light meters, electronic flashes, ...

E. R. Berrin

1982-01-01

137

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.

Ptv, Idaho

2011-08-09

138

Investigation of Shotcrete.  

National Technical Information Service (NTIS)

Two processes for pneumatic application of concrete (shotcreting), the wet and dry, both with fine and coarse aggregate, were investigated. Specimens cored from panels of the pneumatically applied concrete were tested to determine such physical properties...

W. O. Tynes W. F. McCleese

1974-01-01

139

Investigations of Probabilistic Inference.  

National Technical Information Service (NTIS)

Reports first-year results of project, The Use of Protocol Analysis and Process Tracing Techniques to Investigate Probabilistic Inference. Research indicates that the most recently presented information is given more attention in situations that require t...

R. M. Hamm

1990-01-01

140

Investigational New Drug Applications  

Center for Biologics Evaluation and Research (CBER)

... New Drug Applications, Content and Format of Investigational New Drug Applications (INDs) for Phase 1 Studies of Drugs, Including Well ... More results from www.fda.gov/drugs/guidancecomplianceregulatoryinformation/guidances

141

Investigating the Influence of \\  

Microsoft Academic Search

This study investigates the effect of inquiry-based instruction on 8th graders' motivation in learning physical science. 295 students participated in this study. The experimental group consisted of five classes (n=155), the \\

Chih-Chung Tsai; Hsiao-Lin Tuan; Chi-Chin Chin; Jung-Chi Chang

142

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

143

WETLAND DETECTION METHODS INVESTIGATION  

EPA Science Inventory

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

144

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.

145

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

Eichinger, John

2009-05-30

146

Old Faithful Plumbing Investigation  

NSDL National Science Digital Library

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

Twin Cities Public Television, Inc.

2007-01-01

147

Ice Core Investigations  

NSDL National Science Digital Library

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 pollution to create a meaningful science learning experience for students.

Krim, Jessica; Brody, Michael

2008-09-01

148

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

149

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

150

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

151

Civil aircraft accident investigation.  

PubMed

This talk reviews some historic aircraft accidents and some more recent. It reflects on the division of accident causes, considering mechanical failures and aircrew failures, and on aircrew training. Investigation results may lead to improved aircraft design, and to appropriate crew training. PMID:24057309

Haines, Daniel

2013-01-01

152

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

153

Styles of Historical Investigation.  

ERIC Educational Resources Information Center

Four styles of historical investigation are identified: realistic, formal, expressive, and pragmatic. For each style the philosophical assumptions of the historian, the methods employed, and criteria for judgment are discussed. Examples of each style in the literature of art education are also examined. (Author/RM)

Erickson, Mary

1985-01-01

154

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

155

Energetic Particles Investigation (EPI)  

Microsoft Academic Search

The Energetic Particles Investigation (EPI) instrument operates during the pre-entry phase of the Galileo Probe. The major science objective is to study the energetic particle population in the innermost regions of the Jovian magnetosphere within 4 radii of the cloud tops and into the upper atmosphere. To achieve these objectives the EPI instrument will make omnidirectional measurements of

H. M. Fischer; J. D. Mihalov; L. J. Lanzerotti; G. Wibberenz; K. Rinnert; F. O. Gliem; J. Bach

1992-01-01

156

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

2013-02-28

157

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

158

Investigations in Martian Sedimentology.  

National Technical Information Service (NTIS)

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 ...

J. M. Moore

1998-01-01

159

Composting: A Scientific Investigation  

NSDL National Science Digital Library

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

Sciences, California A.

2008-01-01

160

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

161

Investigating Online Learning.  

ERIC Educational Resources Information Center

Reports on Try Science, a program designed to investigate the learning experiences and outcomes of teachers engaged in a unique collaboration--a master's degree program in science education for elementary and middle school teachers conducted entirely online. Discusses the learning experiences, degree of understanding of meaning of inquiry in

Hands On!, 2003

2003-01-01

162

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.

163

Managing Criminal Investigations.  

ERIC Educational Resources Information Center

|The report discusses many ways for police managers to improve the success of their departments' criminal investigation efforts. Management issues addressed include budgeting and allocating resources; improving relationships with the prosecutor; interacting with the public, especially victims and witnesses; improving relationships between

Bloch, Peter B.; Weidman, Donald R.

164

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:- Mendels 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.

165

Varieties of Investigative Evaluation.  

ERIC Educational Resources Information Center

|Seven articles highlight evaluations that are especially investigative in nature to examine how common elements in these studies can be used to improve evaluation and practice. The evaluator is seen as detective, ethnographer and management consultant, national program monitor and analyst, and international development specialist. (SLD)|

Smith, Nick L., Ed.

1992-01-01

166

SCI: Skin Cancer Investigation  

NSDL National Science Digital Library

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

American Association for the Advancement of Science (AAAS;)

2010-05-26

167

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.

Gerber, Nancy

168

Practical Investigations of Volition.  

ERIC Educational Resources Information Center

|Studied conditions and consequences, the characteristics of agentic (volitional, teleological) human behavior in investigations of weight control, vocational exploration, and eating disorders. Demonstrated the ability of individuals professing eating and exercise problems, to exhibit control; and in separate study examining personality factors

Lazarick, Donna L.; And Others

1988-01-01

169

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

Urban-Rich, Juanita

2006-01-01

170

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

171

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

172

OTV bearing deflection investigation  

NASA Astrophysics Data System (ADS)

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.

1993-04-01

173

Investigating effects of temperature  

NSDL National Science Digital Library

To address SC.5.P.9.1, students can be given opportunities to compare the reaction with microwaving and without microwaving. Students could also investigate the differences between putting the milk blobs in the refrigerator or leaving them out.Incorporate the nature of science by giving students opportunities to hypothesize throughout the activity. For example, students can hypothesize what they think will be different between the warm milk and the cold milk. Students may draw upon their previous experience with cooking or with leaving milk out of the fridge. Students could record their hypotheses and observations in a science notebook. Recording observations about the milk and vinegar before and after heating the milk will also support nature of science. After the investigation, students could be given opportunities to ask questions about how temperature affects other reactions or mixtures or ask questions related to chemical reactions.

2011-09-12

174

Ball Lightning Investigations  

NASA Astrophysics Data System (ADS)

Ball lightning (BL) researches' review and theoretical models of three different authors are presented. The general review covers investigations from 1838 until the present day, and includes a discussion on observation data, experimental modeling, and theoretical approaches. Section 6.1 is written by Bychkov and Nikitin; authors of the sections 6.2, 6.3 and 6.4 are, respectively, Bychkov, Nikitin and Dijkhuis.

Bychkov, V. L.; Nikitin, A. I.; Dijkhuis, G. C.

175

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

176

Snettisham line investigation  

SciTech Connect

The first phase of the study involved the Electro-Magnetic Transient Program (EMTP) studies of the Snettisham line investigation. The EMTP was successfully run with half voltage line energization and with full line energization. The computer runs of the full voltage energization showed a large number of surge arrestor operations with high arrester currents. At half voltage energization, none of the arresters operated and harmonic voltages and currents were considerably less than in the full voltage case. (MOW)

Not Available

1984-12-21

177

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 trees 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

178

Airplane Wing Investigation  

NSDL National Science Digital Library

This activity (located on page 3 of the PDF) is a full inquiry investigation into Bernoullis 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

179

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 (20002011) 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.

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

2011-01-01

180

Fire investigation handbook  

NASA Astrophysics Data System (ADS)

The handbook is a reference tool designed to be used by the beginning or by the experienced fire investigator. How each person uses this book will depend upon a particular need and level of experience. The broad areas covered are: fire ground procedures; post fire interviews; the building and its makeup; ignition sources; the chemistry and physics of fire and sources of information. The appendices have sections on how to organize an arson task force; the expert witness; independent testing laboratories; and selective bibliography.

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

1980-08-01

181

Investigate incidents with MRC  

SciTech Connect

Incident reports often say that the root cause of an accident was failure to follow established procedures. There are two inherent fallacies in this statement. The first is singling out one cause above all others as the root cause. Identifying only one cause is usually oversimplistic and can result in seriously incomplete preventive measures. This paper reports on the concept of multiple root cause (MRC) which is receiving increased recognition as a more effective model. The second fallacy is identifying 'failure to follow established procedure' as a 'root' cause. The underlying reasons for failing to follow the procedure must be identified, evaluated and corrected. If the investigation stops prematurely (and thus fails to address these underlying causes), then preventive actions will likely be incomplete and thereby less effective.

Philley, J. (Haliburton NUS, Environmental Corp., Houston, TX (United States))

1992-09-01

182

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

183

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.

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

2012-01-01

184

Radar investigation of asteroids  

NASA Astrophysics Data System (ADS)

Radar investigations were conducted of selected minor planets, including: (1) observations during 1981-82 of 10 potential targets (2 Pallas, 8 Flora, 12 Victoria, 15 Eunomia, 19 Fortuna, 22 Kalliope, 132 Aethra, 219 Thusnelda, 433 Eros, and 2100 Ra-Shalom); and (2) continued analyses of observational data obtained during 1980-81 for 10 other asteroids (4 Vesta, 7 Iris, 16 Psyche, 75 Eurydike, 97 Klotho, 216 Kleopatra, 1685 Toro, 1862 Apollo, 1865 Cerberus, and 1915 Quetzalcoatl). Scientific objectives include estimation of echo strength, polarization, spectral shape, spectral bandwidth, and Doppler shift. These measurements: (1) yield estimates of target size, shape, and spin vector; (2) place constraints on topography, morphology, and composition of the planetary surface; (3) yield refined estimates of target orbital parameters; (4) reveal the presence of asteroidal satellites.

Ostro, S. J.

1981-07-01

185

Investigations of Sayre's Equation.  

NASA Astrophysics Data System (ADS)

Available from UMI in association with The British Library. Since the discovery of X-ray diffraction, various methods of using it to solve crystal structures have been developed. The major methods used can be divided into two categories: (1) Patterson function based methods; (2) Direct phase-determination methods. In the early days of structure determination from X-ray diffraction, Patterson methods played the leading role. Direct phase-determining methods ('direct methods' for short) were introduced by D. Harker and J. S. Kasper in the form of inequality relationships in 1948. A significant development of direct methods was produced by Sayre (1952). The equation he introduced, generally called Sayre's equation, gives exact relationships between structure factors for equal atoms. Later Cochran (1955) derived the so-called triple phase relationship, the main means by which it has become possible to find the structure factor phases automatically by computer. Although the background theory of direct methods is very mathematical, the user of direct-methods computer programs needs no detailed knowledge of these automatic processes in order to solve structures. Recently introduced direct methods are based on Sayre's equation, so it is important to investigate its properties thoroughly. One such new method involves the Sayre equation tangent formula (SETF) which attempts to minimise the least square residual for the Sayre's equations (Debaerdemaeker, Tate and Woolfson; 1985). In chapters I-III the principles and developments of direct methods will be described and in chapters IV -VI the properties of Sayre's equation and its modification will be discussed. Finally, in chapter VII, there will be described the investigation of the possible use of an equation, similar in type to Sayre's equation, derived from the characteristics of the Patterson function.

Shiono, Masaaki

186

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 levelseliminating 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. Satcons new power conversion devices will eliminate these heavy transformers and connect a utility-scale solar power system directly to the grid. Satcons modular devices are designed to ensure reliabilityif one device fails it can be bypassed and the system can continue to run.

None

2012-01-25

187

Evaluation of the Military Criminal Investigative Organizations Sexual Assault Investigations.  

National Technical Information Service (NTIS)

We evaluated the Military Criminal Investigative Organizations' (MCIOs') sexual assault investigations completed in 2010 to determine whether they completed investigations as required by DoD, Military Service, and MCIO guidance. Our evaluation focused on ...

R. R. Stone

2013-01-01

188

The Dawn Topography Investigation  

NASA Astrophysics Data System (ADS)

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 Dawns 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 Vestas 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, F.; Scholten, F.; Gaskell, R. W.; Jorda, L.; Keller, H.-U.; Zuber, M. T.; Smith, D. E.; Mastrodemos, N.; Mottola, S.

2011-12-01

189

Energetic Particles Investigation (EPI)  

NASA Astrophysics Data System (ADS)

The EPI instrument operates during the pre-entry phase of the Galileo Probe. The main objective is the study of the energetic particle population in the inner Jovian magnetosphere and in the upper atmosphere. This will be achieved through omnidirectional measurements of electrons, protons, alpha-particles and heavy ions (Z greater than 2) and recording intensity profiles with a spatial resolution of about 0.02 Jupiter radii. Sectored data will also be obtained for electrons, protons, and alpha-particles to determine directional anisotropies and particle pitch angle distributions. The detector assembly is a two-element telescope using totally depleted circular silicon surface-barrier detectors surrounded by cylindrical tungsten shielding. The lower energy threshold of the particle species investigated during the Probe's pre-entry phase is determined by the material thickness of the Probe's rear heat shield which is required for heat protection of the scientific payload during entry into the Jovian atmosphere. The EPI instrument is combined with the Lightning and Radio Emission Detector and both instruments share one interface of the Probe's power, command, and data unit.

Fischer, H. M.; Mihalov, J. D.; Lanzerotti, L. J.; Wibberenz, G.; Rinnert, K.; Gliem, F. O.; Bach, J.

1992-05-01

190

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

191

The Juno Waves investigation  

NASA Astrophysics Data System (ADS)

The Juno spacecraft was successfully launched on 5 August 2011 to begin its journey to Jupiter. With its arrival in the summer of 2016, the latest in a series of missions to Jupiter will begin. Juno will explore the origins of not only Jupiter, but also the solar system as a whole by understanding the interior of the planet and its atmospheric composition and dynamics. Juno will also be the first mission to explore Jupiter's polar magnetosphere and auroras. The Waves investigation is part of a suite of instruments which will contribute to this latter objective. Waves will measure wave electric fields in the frequency range from 50 Hz to 40 MHz and magnetic fields in the range of 50 Hz to 20 kHz to study radio and plasma waves in Jupiter's polar magnetosphere. Most importantly, Waves will contribute to understanding auroral processes at the giant planet via in situ observations of the sources of Jovian hectometric and decametric radiation as well as plasma waves which likely accelerate particles as part of the auroral process.

Kurth, W. S.; Kirchner, D. L.; Hospodarsky, G. B.; Mokrzycki, B. T.; Averkamp, T. F.; Robison, W. T.; Piker, C. W.; Gurnett, D. A.; Sampl, M.; Rucker, H. O.; Zarka, P.

2012-09-01

192

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

193

FDA Investigations Operations Manual, 2013.  

National Technical Information Service (NTIS)

This is the Investigations Operations Manual (IOM) for the year 2013. The IOM is the primary source regarding Agency policy and procedures for field investigators and inspectors. This extends to all individuals who perform field investigational activities...

2013-01-01

194

Aquifer stability investigations  

SciTech Connect

The study of compressed air energy storage (CAES) in porous rock reservoirs is carried out within the Reservoir Stability Studies Program at Pacific Northwest Laboratory. The goal of the study is to establish criteria for long-term stability of aquifer CAES reservoirs. These criteria are intended to be guidelines and check lists that utilities and architect-engineering firms may use to evaluate reservoir stability at candidate CAES sites. These criteria will be quantitative where possible, qualitative where necessary, and will provide a focal point for CAES relevant geotechnical knowledge, whether developed within this study or available from petroleum, mining or other geotechnical practices using rock materials. 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. Work is presently planned to be complete by 1983 at the end of the field test. At that time the final stability criteria for aquifers will be issued. Attached here also are preliminary criteria for aquifers.

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

1981-09-01

195

Criminal investigative analysis.  

PubMed

In its pursuit of those responsible for the commission of serious violent crime, law enforcement will continue to explore and refine the Criminal Investigative Analysis process. To this end, it will enthusiastically collaborate with the medical profession. The results of continuing studies will be made available to relevant bodies. If a general practitioner becomes aware of a patient's unexplained changes of behaviour an additional question should perhaps be considered: "What else is happening in your life?" The response and its evaluation and subsequent intervention may avert a tragedy. Notification of police and anonymity of a practitioner are always contentious issues. In my mind, responsibility to the community in general completely over-shadows the debate on anonymity and confidentiality. In recent discussions with professionals involved in the mental health field there was a consensus that if a treating doctor becomes aware that a person is likely to be violent or cause harm to themselves or the community, the problem of confidentiality does not occur. The safety of the public is paramount. In addition, senior vice president of the Australian Medical Association, Dr Brendan Nelson, was quoted in the Sunday Age 16 August 1992 as follows: "If a patient tells you that she is going to kill her husband and you believe it is a serious threat, then you have a responsibility to the person whose life is in danger to inform the authorities." To do otherwise, surely is an injustice and it would appear to therefore follow, also unethical and immoral.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:8481116

Minisini, C

1993-04-01

196

Clinical Investigator Inspection List (CLIIL)  

Center for Drug Evaluation (CDER)

... addresses, and other information gathered from inspections of clinical investigators who have performed studies with investigational human drugs. ... More results from www.fda.gov/drugs/informationondrugs

197

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

198

Chemistry. 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 19 chemistry investigations. These investigations focus on concepts related to: interactions with water; salt and calcium;

Renner, John W.; And Others

199

Chemistry. 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 19 chemistry investigations. These investigations focus on concepts related to: interactions with water; salt and calcium;

Renner, John W.; And Others

200

Investigating Investigators: How Presentation Order Influences ParticipantInvestigators Interpretations of Eyewitness Identification and Alibi Evidence  

Microsoft Academic Search

Presentation order of ID and Alibi evidence was manipulated for undergraduate participants who conducted a simulated police\\u000a investigation. Experiment 1 found a recency effect when an eyewitness rejected the investigators suspect. Experiment 2 also\\u000a examined order effects, exploring how participantinvestigators evaluated alibi information in addition to eyewitness ID information.\\u000a When investigators saw the witness identify the suspect but also received

Leora C. Dahl; C. A. Elizabeth Brimacombe; D. Stephen Lindsay

2009-01-01

201

Information for Clinical Investigators (INDs)  

Center for Drug Evaluation (CDER)

... Information for Clinical Investigators (INDs). ... During these trials, an investigation compound is administered to humans and is evaluated for its safety ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

202

Lithium Inorganic Electrolyte Battery Investigation.  

National Technical Information Service (NTIS)

Lithium Thionyl Chloride Batteries were investigated for three potential applications and their performance measured under simulated loads. The problem of passivation during storage was investigated and additions of 5 weight percent sulfur dioxide was fou...

D. L. Chua C. R. Walk

1977-01-01

203

Investigation of Optimum Laser Pumping.  

National Technical Information Service (NTIS)

An important task of the Optimum Pumping Technology program is the investigation of the feasibility of discharge pumping electronic transition lasers. Such an investigation requires a detailed knowledge of the secondary electron transport properties that ...

B. N. ivastava J. H. Jacob M. Rokni

1978-01-01

204

Investigating investigators: how presentation order influences participant-investigators' interpretations of eyewitness identification and alibi evidence.  

PubMed

Presentation order of ID and Alibi evidence was manipulated for undergraduate participants who conducted a simulated police investigation. Experiment 1 found a recency effect when an eyewitness rejected the investigator's suspect. Experiment 2 also examined order effects, exploring how participant-investigators evaluated alibi information in addition to eyewitness ID information. When investigators saw the witness identify the suspect but also received a strong alibi for that suspect a recency effect occurred, such that whichever piece of information occurred at the end of the procedure had the strongest impact on investigators. Thus, type of evidence and evidence order both had a dramatic influence on participant-investigators' decisions. PMID:18810615

Dahl, Leora C; Brimacombe, C A Elizabeth; Lindsay, D Stephen

2008-09-23

205

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

206

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

207

Investigation of the acute abdomen  

Microsoft Academic Search

The acute abdomen accounts for the majority of general surgical emergency admissions. The causes range from life-threatening surgical emergencies to benign, gynaecological and even medical conditions. A systematic approach is required for accurate diagnosis. For most patients with an acute abdomen, investigations will supplement a careful structured history and examination. Appropriate investigations are important, to confirm the diagnosis and start

Janette K. Smith; Dileep N. Lobo

2008-01-01

208

Investigative Tracking in Library Evaluation.  

ERIC Educational Resources Information Center

|A pilot study of the use of an investigative journalism document-tracking procedure in the evaluation of library operations is discussed. The technique provides a straightforward but powerful method of evaluation that is equally applicable in simple studies and complex investigations. (Author/AL)|

Smith, Nick L.

1982-01-01

209

A Psychoacoustic Investigation of Foreignness.  

ERIC Educational Resources Information Center

|A study was conducted to investigate and measure the foreignness of ten languages. Forty-five listeners judged the relative foreignness of 2,250 paired utterances, and ordinal scales were made from their judgments. The purpose of the investigation was to determine the feasibility of the development of an auditory, foreign-language aptitude test

Alford, Bronwyn Lindsay

210

Community Investigations: Looking at Uncertainty.  

ERIC Educational Resources Information Center

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

Kolbe, Tom

1999-01-01

211

Economic Crime Investigators at Work  

Microsoft Academic Search

This article presents the findings of an empirical study on the work of economic crime (EC) investigators, describing and analyzing its key, particular features. In the 1990s, there were real efforts towards, and some success in, making economic crime control a routine and normal part of police work in Finland. The extent to which such forms of investigation can be

Anne Alvesalo

2003-01-01

212

ENGINEERING CONSIDERATIONS: WATERBORNE DISEASE INVESTIGATIONS  

EPA Science Inventory

As part of a disease outbreak investigation involving drinking water, an engineering investigation may be necessary to determine how or why the pathogen of concern was able to get to the consumer. In many of the US outbreaks, the survival of the pathogen was dependent on multiple...

213

PSYCHOLOGICAL INVESTIGATIONS OF UNCONSCIOUS PERCEPTION  

Microsoft Academic Search

This paper reviews the history of psychological investigations of unconscious perception and summarizes the current status of experimental research in this area of investigation. The research findings described in the paper illustrate how it is possible to distinguish experimentally between conscious and unconscious perception. The most success- ful experimental strategy has been to show that a stimulus can have qualitatively

Philip M. Merikle; Ontario N; Meredyth Daneman

1998-01-01

214

Investigating Investigators: Examining the Impact of Eyewitness Identification Evidence on Student-Investigators  

Microsoft Academic Search

This research examined the impact of eyewitness identification decisions on student-investigators. Undergraduates played the\\u000a role of police investigators and interviewed student-witnesses who had been shown either a good or poor view of the perpetrator\\u000a in a videotaped crime. Based on information obtained from the witness, student-investigators then chose a suspect from a database\\u000a containing information about potential suspects and rated

Melissa A. Boyce; D. Stephen Lindsay; C. A. E. Brimacombe

2008-01-01

215

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

Microsoft Academic Search

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

Amelia Phillips; Kara L. Nance

2010-01-01

216

Investigating investigators: examining the impact of eyewitness identification evidence on student-investigators.  

PubMed

This research examined the impact of eyewitness identification decisions on student-investigators. Undergraduates played the role of police investigators and interviewed student-witnesses who had been shown either a good or poor view of the perpetrator in a videotaped crime. Based on information obtained from the witness, student-investigators then chose a suspect from a database containing information about potential suspects and rated the probability that their suspect was the culprit. Investigators then administered a photo lineup to witnesses, and re-rated the probability that their suspect was guilty. Student-investigators were highly influenced by eyewitness identification decisions, typically overestimating the information gained from the identification decision (except under conditions that led witnesses to be very accurate), and were generally unable to differentiate between accurate and inaccurate witnesses. PMID:18060486

Boyce, Melissa A; Lindsay, D Stephen; Brimacombe, C A E

2007-12-01

217

Mishap Investigation, Reporting, and Recordkeeping.  

National Technical Information Service (NTIS)

The Instruction reissues and updates Department of Defense (DoD) Instruction 6055.7, December 16, 1981. The Instruction updates guidance for investigation, reporting, and recordkeeping on mishaps and occupational illnesses. The Instruction provides format...

J. Currin

1989-01-01

218

Biochemical Investigations on Blood Parasitism.  

National Technical Information Service (NTIS)

A summary is given of the results of an investigation of the nature of blood parasitism by utilizing the obligate intracellular malaria parasite as a model for understanding intracellular parasitism. Selected for study were the quality and quantity of ami...

I. W. Sherman

1970-01-01

219

Solid State Doppler Sensor Investigation.  

National Technical Information Service (NTIS)

The report describes the investigations for a new airborne solid state doppler sensor that provides 3-axis velocity data for doppler navigation with greatly improved accuracy and low lag. Heading velocity estimation within 0.05% is achieved with smoothing...

A. E. Ruvin L. I. Smilen L. Weinberg

1972-01-01

220

THERMOGRAVIMETRIC KINETICS INVESTIGATION OF BIOBLENDS  

Technology Transfer Automated Retrieval System (TEKTRAN)

Bioblends are polymer blends in which at least one component is biodegradable. Binary bioblends of polystyrene (PS) with biodegradable polyesters were prepared and investigated using Derivative Thermogravimetric (DTGA) degradation kinetics. The biodegradable polyesters were: Poly(lactic acid) (PL...

221

Human Factors in Incident Investigation.  

National Technical Information Service (NTIS)

The Savannah River Site (SRS), located in South Carolina, is a key Department of Energy production and research facility for nuclear materials. Incident investigations performed at the Savannah River Site showed the cause of approximately 75% of all opera...

M. E. Armstrong

1989-01-01

222

Multidisciplinary Accident Investigation. Volume I.  

National Technical Information Service (NTIS)

The report describes the methodology, results, discussions, conclusions and recommendations pertaining to the investigation of 50 fatal and non-fatal vehicular accidents occurring in the Greater Baltimore metropolitan area from June 28, 1974 to June 30, 1...

R. S. Fisher

1976-01-01

223

Investigation of Oblique Hypervelocity Impact.  

National Technical Information Service (NTIS)

This report describes the results of an investigation of phenomena associated with the oblique hypervelocity impact of spherical projectiles on multi-sheet aluminum structures. A model to be employed in the design of meteoroid and space debris protection ...

W. P. Schonberg

1987-01-01

224

Experimental Investigation of Dynamic Stall.  

National Technical Information Service (NTIS)

This thesis discusses an experimental investigation of dynamic stall for an NACA 0015 airfoil rotated at different constant angular rates. It describes a microcomputer-based automatic data acquisition system capable of acquiring 1000 items of data per sec...

D. C. Daley

1983-01-01

225

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)

226

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.

Foundation, Wgbh E.

2007-04-19

227

IND Application Procedures: Investigator's Responsibilities  

Center for Drug Evaluation (CDER)

... the Controlled Substances Act, the investigator must take adequate precautions to prevent theft or diversion of the substance into illegal channels of ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

228

Investigations of Molecular Halogen Lasers.  

National Technical Information Service (NTIS)

This work reports on experimental and theoretical investigations of D' -> A' transitions from an ionically bound upper level to a covalent lower state in diatomic halogen molecules. In homonuclear molecules laser action had been achieved by other authors....

M. Diegelmann

1980-01-01

229

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.

230

Hurricane Katrina Wind Investigation Report  

Microsoft Academic Search

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

2007-01-01

231

Questions on the WTC Investigation  

Microsoft Academic Search

A critique of the World Trade Center investigation with respect to the cause of the collapse of towers 1 and 2 is presented.\\u000a The official investigation conducted by the National Institute of Standards and Technology (NIST) concluded that the collapse\\u000a was due to the fires heating the core columns that were stripped of insulation by the aircraft impacts. An alternative

James G. Quintiere

232

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

233

An Investigation of Students' Ability To Communicate Science Investigations.  

ERIC Educational Resources Information Center

A study investigated the ability of educationally disadvantaged and limited-English-proficient University of Cape Town (South Africa) students to write about science research projects. Analysis of students' reports showed a strong relationship between task presentation methods, specific task-completion guidelines, and quality of writing. Poor

Kaunda, L.; Allie, S.; Buffler, A.; Campbell, B.; Lubben, F.

1998-01-01

234

Investigative Reporters and Editors, Inc.  

NSDL National Science Digital Library

In 1975, a group of concerned reporters and investigative journalists met to share personal stories about reporting and writing. After one of their number suggested that what most characterizes the investigative reporter is "a sense of outrage", they agreed to form the group that is now known as Investigative Reporters and Editors (IRE). On their homepage, visitors can read more about their mission, and job-seekers will definitely want to visit the "Networking/Jobs" section, as it contains recent job postings from around the country, complete with an RSS feed. Journalists and other such types will want to get their feet wet in the "Resource Center", with support from a number of charitable organizations, the Resource Center contains a database of over 20,000 stories and links to helpful news sources.

235

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

236

21 CFR 312.55 - Informing investigators.  

Code of Federal Regulations, 2013 CFR

...INVESTIGATIONAL NEW DRUG APPLICATION Responsibilities of Sponsors and Investigators § 312.55 Informing investigators. (a) Before the investigation begins, a sponsor (other than a sponsor-investigator) shall give each...

2013-04-01

237

Hrtem Investigation of Nanocrystalline Materials  

NASA Astrophysics Data System (ADS)

The microstructural and structural investigation performed on nanocrystalline (NC) materials will be reported using TEM, SAED, EDS, HRTEM and XRD measurements. The aim of this investigation was to characterize ZrO2 and ZrO2-Y2O3 NC materials prepared by ball-milling. To elucidate the process of aloying of ZrO2-Y2O3 NC material the HRTEM image processing was applied which gave a strong support to the methods mentioned. The methods gave the evidence into a particular process on the atomic level.

Tonejc, Andjelka M.

238

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

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

2011-01-01

239

The Early Years: Investigable Questions  

NSDL National Science Digital Library

Teachers may not need to teach children to ask questions, just develop that safe place where questions can be voiced, observe children to see the questions in their actions, and develop a culture that appreciates and records questions. An investigable que

Ashbrook, Peggy

2010-12-01

240

Titanium Drill Pipe Extrusion Investigation.  

National Technical Information Service (NTIS)

In the titanium drill pipe extrusion investigation in progress at Harvey Aluminum, extrusion work to date has not shown optimum benefits of the steel clad billets because of lubrication failure. As a result of a meeting in November with personnel of Brown...

H. L. Gilbert

1965-01-01

241

Investigation of space filling capacitors  

Microsoft Academic Search

This paper investigates the usage of the family of space filling curves in capacitor design. Some of the known family members are studied regarding their applications as area efficient capacitor elements. One of the main advantages of these structures is that they divide the space into two continuous electrodes. This makes extra connecting vias and metal layers unnecessary, and enables

T. Moselhy; H. Ghali; H. F. Ragaie; H. Haddara

2003-01-01

242

Yukon River Anadromous Fish Investigations.  

National Technical Information Service (NTIS)

The current Yukon River Anadromous Fish Investigations were initiated in 1972 to determine: (1) The size and effect of commercial and subsistence harvests on the various stocks of king and chum salmon; (2) develop estimates or indices of the magnitudes an...

L. L. Trasky

1974-01-01

243

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

Logan, Sarah; Johnston, Rhona

2010-01-01

244

Investigating gender differences in reading  

Microsoft Academic Search

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 following different aspects of reading: differences in behavioural and

Sarah Logan; Rhona Johnston

2010-01-01

245

Phenomenological investigations into personnel signatures  

Microsoft Academic Search

Georgia Tech has initiated a research program into the issues surrounding the detection of covert personnel present in a wide variety of scenarios. These initial investigations have been focused on a detailed phenomenological analysis of human physiology with the subsequent identification and characterization of potential observables-particularly in the context of urban environments during this phase. A parallel effort focused on

J. Michael Cathcart

2005-01-01

246

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

247

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.

Marquis, John; Hafner, Katrin; Hauksson, Egill

248

The Glast Guest Investigator Program  

SciTech Connect

We provide an overview of the GLAST Guest Investigator (GI) program, which will support basic research relevant to the GLAST mission in yearly cycles beginning approximately two months after launch. Current details about the GLAST GI program will always be posted on the GLAST Science Support Center (GSSC) website: http://glast.gsfc.nasa.gov/ssc/.

Band, David L. [Code 661, NASA/GSFC, Greenbelt, MD 20771 (United States); CRESST/UMBC (United States)

2007-07-12

249

(Structural investigation of curium bismuthide)  

Microsoft Academic Search

The primary objective of the collaborative studies with EITU was to study curium bismuthide using energy dispersive X-ray diffraction to monitor its structure as a function of pressure. This objective was accomplished and the material was investigated up to 0.48 megabars of pressure. These studies were a continuation of established and productive collaborations between ORNL and EITU. The study of

Haire

1990-01-01

250

SERI research investigates core daylighting  

SciTech Connect

SERI's Thermal Systems and Engineering Branch investigated the direct use of heliostats for illuminating the interiors of nonresidential buildings. Although it is still in the early, experimental stage, this project is one of a variety of advanced core daylighting concepts being tested, including selective glazing materials, direct-beam daylighting, optical fibers, and light pipes.

Not Available

1984-11-01

251

Investigating Students' Foreign Language Anxiety  

Microsoft Academic Search

This paper investigates Indonesian students' foreign language anxiety. It seeks to find out the types of anxiety experienced by FL learners and the strategies they use to cope with their anxiety. Questionnaires with a Likert scale ranging from disagree to agree were used to collect data. The findings revealed that the majority of students, despite their gender and level differences,

Ardi Marwan

2007-01-01

252

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.

253

Indoor air quality investigation protocols  

SciTech Connect

Over the past 10 to 15 years, an increasing number of complaints about discomfort and health effects related to indoor air quality (IAQ) have been reported. The increase in complaints has been accompanied by an increase in requests for IAQ investigations. This study presents an overview of the many IAQ investigation protocols published since 1984. For analysis, the protocols are divided into four categories: solution-oriented, building diagnostics, industrial hygiene, and epidemiology. In general, the protocols begin with general observations, proceed to collect more specific data as indicated, and end with conclusions and recommendations. A generic IAQ protocol is presented that incorporates the common aspects of the various protocols. All of the current protocols place heavy emphasis on the ventilation system during the investigation. A major problem affecting all of the current protocols is the lack of generally accepted IAQ standards. IN addition, the use of questionnaires, occupant interviews, and personal diaries (as well as the point in the investigation at which they are administered) differs among the protocols. Medical evaluations and verification procedures also differ among the protocols.

Greene, R.E.; Williams, P.L. [Univ. of Georgia, Athens, GA (United States)

1996-10-01

254

Investigation of Superlattice Device Structures.  

National Technical Information Service (NTIS)

This report describes the investigation of growth properties, and the structure of epitaxial multilayer Si(Si(1x)Ge(x)) films grown on bulk Silicon Substrates. It also describes the fabrication and characterization of MOSFET and MESFET devices made on the...

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

1985-01-01

255

Mechanical Hole Burning Spectroscopic Investigation  

Microsoft Academic Search

Mechanical spectral hole burning (MSHB) was previously applied to a densely entangled block copolymer and successfully distinguishes the heterogeneous from the homogeneous state. Here, we chose polystyrene (PS) solutions to further investigate the effect of entanglement density on mechanical spectral hole burning. The entanglement density was varied by changing either solution concentration or molecular weight of the PS. Dynamics in

Qian Qin; Gregory McKenna

2008-01-01

256

Investigation following resuscitated cardiac arrest.  

PubMed

Roughly two thirds of resuscitated cardiac arrests in children and youth are due to inherited heart diseases. The most commonly implicated are the cardiac ion channelopathies long QT syndrome, CPVT (catecholaminergic polymorphic ventricular tachycardia) and Brugada syndrome. Diagnosis is pivotal to further management of the child if he/she survives, and also to other family members who may be at risk. Thorough investigation of the cardiac arrest survivor is essential to either identify or exclude inherited heart disease. If standard cardiac investigation does not reveal a diagnosis, pharmacological provocation tests are needed to unmask electrocardiographic signs of disease, even if, due to severe brain injury, it is planned ultimately to allow a natural death. Examples are the ajmaline/flecainide challenge for Brugada syndrome and epinephrine for CPVT. A supportive, informative and sympathetic approach to the family is essential. An arrhythmia specialist and a cardiac genetic service should be involved early, with storage of DNA and cardiac/genetic investigation of the family. This review proposes a diagnostic algorithm-based approach to the investigation of this increasingly common clinical scenario. PMID:23060598

Skinner, Jonathan R

2012-10-11

257

Investigating Minerals: Promoting Integrated Inquiry  

ERIC Educational Resources Information Center

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

Thompson, Rudi; Carmack, Elizabeth

2007-01-01

258

INVESTIGATIONS WITH MERCURY FLOW REACTOR  

EPA Science Inventory

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

259

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

260

Investigation of Supercritical (Feher) Cycle.  

National Technical Information Service (NTIS)

Preliminary Design of the XFCTAP 01-01 Combined Rotating Unit (CRU) is described in this report. The unit is intended for the investigation of Supercritical (Feher) cycle engine components. The CRU consists of a single stage axial reaction turbine, a sing...

1968-01-01

261

The Glast Guest Investigator Program  

NASA Astrophysics Data System (ADS)

We provide an overview of the GLAST Guest Investigator (GI) program, which will support basic research relevant to the GLAST mission in yearly cycles beginning approximately two months after launch. Current details about the GLAST GI program will always be posted on the GLAST Science Support Center (GSSC) website: http://glast.gsfc.nasa.gov/ssc/.

Band, David L.

2007-07-01

262

Kursanov's Ideas in Phytohormone Investigations  

Microsoft Academic Search

The main scientific interests of A.L. Kursanov concerned the translocation of substances throughout the plant, which unites different organs into a whole organism. He paid close attention to both the export of assimilates from leaves and the influx of the products synthesized in the roots, including those formed with the participation of uptaken substances, into shoots. His investigations covered specific

O. N. Kulaeva

2002-01-01

263

Microstructural investigations on aerated concrete  

Microsoft Academic Search

Aerated concrete is characterized by the presence of large voids deliberately included in its matrix to reduce the density. This study reports the investigations conducted on the structure of cement-based autoclaved aerated concrete (AAC) and non-AAC with sand or fly ash as the filler. The reasons for changes in compressive strength and drying shrinkage are explained with reference to the

N. Narayanan; K. Ramamurthy

2000-01-01

264

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

265

Investigating Factors that Influence Climate  

NSDL National Science Digital Library

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

266

Mechanical Hole Burning Spectroscopic Investigation  

NASA Astrophysics Data System (ADS)

Mechanical spectral hole burning (MSHB) was previously applied to a densely entangled block copolymer and successfully distinguishes the heterogeneous from the homogeneous state. Here, we chose polystyrene (PS) solutions to further investigate the effect of entanglement density on mechanical spectral hole burning. The entanglement density was varied by changing either solution concentration or molecular weight of the PS. Dynamics in different regimes ranging from close to the Rouse regime into the terminal region were also examined.Our results are consistent with a heterogeneous dynamics over both entanglement (or plateau) and Rouse regimes. Terminal relaxation dynamics, on the other hand, were always found to be homogeneous for the PS/diethyl phthalate solutions investigated. In addition, no significant dependence of the hole burning event on entanglement density was observed.

Qin, Qian; McKenna, Gregory

2008-03-01

267

Combinatorial Investigations of Polymer Adhesion  

NSDL National Science Digital Library

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

Crosby, Alfred; Karim, Alamgir; Amis, Eric

2001-01-01

268

Neuropsychological investigation of amateur boxers.  

PubMed Central

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 analysis, analysis of the influence of within-boxing variables, length of career, level of competition and prospective longitudinal investigation. Amateur boxers were found to exhibit no signs of neuropsychological dysfunction in any analysis. However some trends emerged suggesting a long career in amateur boxing might reduce fine motor reactions, although such findings are within the normal range and do not represent central neuropsychological functioning. Thus amateur boxing does not appear to expose individuals to neurological dysfunction.

Butler, R J

1994-01-01

269

Microstructural investigations on aerated concrete  

SciTech Connect

Aerated concrete is characterized by the presence of large voids deliberately included in its matrix to reduce the density. This study reports the investigations conducted on the structure of cement-based autoclaved aerated concrete (AAC) and non-AAC with sand or fly ash as the filler. The reasons for changes in compressive strength and drying shrinkage are explained with reference to the changes in the microstructure. Compositional analysis was carried out using XRD. It was observed that fly ash responds poorly to autoclaving. The process of pore refinement in fly ash mixes is discussed with reference to the formation of Hadley grains as well as fly ash hydration. The paste-void interface in aerated concrete investigated in relation to the paste-aggregate interface in normal concrete revealed the existence of an interfacial transition zone.

Narayanan, N.; Ramamurthy, K.

2000-03-01

270

Authorship Analysis in Cybercrime Investigation  

Microsoft Academic Search

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

Rong Zheng; Yi Qin; Zan Huang; Hsinchun Chen

2003-01-01

271

?SR investigation of cupric oxide  

Microsoft Academic Search

TF and ZF?SR-investigations were performed on high purity CuO powder. By TF measurements a phase transition to the ordered state was observed at 227K. A commensurate-incommensurate phase transition was detected at 213K by ZF measurements. In the commensurate phase we observed the Larmor precession. Four signals were detected below 55K, but by increasing temperature above 190K, precession became having only

V. N. Duginov; V. G. Grebinnik; K. I. Gritsaj; T. N. Mamedov; V. G. Olshevsky; V. Yu. Pomjakushin; V. A. Zhukov; B. F. Kirillov; I. A. Krivosheev; A. V. Pirogov; A. N. Ponomarev

1994-01-01

272

Theoretical investigation of neutral francium  

Microsoft Academic Search

Energy levels of neutral francium are investigated in the Ritz formalism along the Rydberg series up to n = 30. Transition probabilities are calculated for the s-p and p-d transitions. Core-polarization effects are included in the model adopted. The validity of the approach has been tested by comparison with the laser lifetime measurements available for the 70953-4075\\/31\\/24\\/012\\/img7 and 70953-4075\\/31\\/24\\/012\\/img8 states

E. Bimont; P. Quinet; V. Van Renterghem

1998-01-01

273

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

274

Investigation on Pyrolysis of Casein  

Microsoft Academic Search

First casein was processed by pyrolysis and investigated under optimal thermal treatment condition to obtain a good quality\\u000a adsorbent with high developed porosity structure and liquid product as a complex raw material for different kind of organic\\u000a compounds with interesting properties and structures. The yields of hard residue, pitch, pyrolysis water and gases were determined\\u000a and compared with the yields

B. Purevsuren; Y. Davaajav

2001-01-01

275

Rosetta Radio Science Investigations (RSI)  

NASA Astrophysics Data System (ADS)

The Rosetta Radio Science Investigations (RSI) experiment addresses fundamental aspects of cometary physics such as the mass and bulk density of the nucleus, its gravity field, nucleus size and shape, internal structure, composition and roughness of the nucleus surface, the abundance of large dust grains, the plasma content in the coma and the combined dust and gas mass flux. RSI does not have a dedicated instrument on the Rosetta spacecraft but makes use of the onboard radio subsystem which is responsible for communication between the spacecraft and the ground stations on Earth. The Rosetta radio subsystem is specially equipped with an Ultra-Stable Oscillator (USO) which significantly improves the sensitivity and accuracy of the measurements. The spacecraft is capable of receiving two uplink signals non-simultaneously at either X-band (7100 MHz) or S-band via the High Gain Antenna (HGA). The downlink transmission via the HGA can occur simultaneously at S-band and X-band. RSI is interested in the nondispersive frequency shifts (classical Doppler) and dispersive frequency shifts (due to the ionized propagation medium), the signal power and the polarization of the radio carrier waves. Variations in these parameters will yield information on the motion of the spacecraft, the perturbing forces acting on the spacecraft and the propagation medium. The RSI science objectives are divided into the primary science objectives (a) cometary gravity field investigations, (b) comet nucleus investigations, (c) cometary coma investigations, (d) asteroid mass and bulk density and the secondary science objectives (e) solar corona sounding, (f) a search for gravitational waves at the comet, the asteroids flybys and during cruise.

Paetzold, M.

276

Empirical Investigations of Student Understanding  

NSDL National Science Digital Library

Why study student understanding of physics? For some of us, "because it's there" is a large part of the reason. However, many of us are also strongly committed to using our findings to improve teaching at the classroom level. One type of investigation that has proven fruitful as a guide for improving student learning is discussed in the article. The underlying goals and assumptions are discussed in general terms. A specific example provides a context for discussing the interpretation of student thinking.

Heron, Paula R.

2005-11-02

277

Experimental investigation of stochastic resonance  

NASA Astrophysics Data System (ADS)

We report the experimental evidence of Stochastic Resonance in the polarized emission of a semiconductor laser. We give for the first time in a real system a complete characterization of the phenomenon based on the residence times probability density, with quantitative agreement with existing theories. By using an accurate choice of the indicator, we also provide a clear evidence of the bona fide resonance. Moreover, we are able to introduce and investigate for the first time a Three-state Stochastic Resonance. .

Barbay, Sylvain; Giacomelli, Giovanni; Marin, Francesco; Rabbiosi, Ivan; Voignier, Vincent

2000-02-01

278

Investigative Experience and Profile Accuracy  

Microsoft Academic Search

\\u000a This chapter describes the research that sought to test the assumption by Hazelwood et al. (1) that investigative experience is an important attribute that those who construct criminal profiles should possess. This\\u000a research replicated components of the study by Kocsis et al. (2) and compared a group of Irish police officers with two control groups of university students in a

David Gogan

279

Investigating heating dynamics in sparks  

NASA Astrophysics Data System (ADS)

After the first streamer discharge front in a spark, heating and gas expansion sets in.This effect underlies the streamer to leader transition in air, and becomes strongerwith increasing density of the medium. We model and solve heat generation by the discharge,the thermal shock and the induced pressure wave. In particular, we investigate the electric breakdown of supercritical nitrogen and the subsequent recovery of insulation, motivated by a possible applicationas a high voltage switch.

Markosyan, Aram; Zhang, Jin; van Heesch, Bert; Ebert, Ute

2013-04-01

280

Investigating the semiconductor industry cycles  

Microsoft Academic Search

The aim of this article is to investigate the links between semiconductor sales and various macroeconomic, financial, industrial variables including inventories, equipment orders or semiconductor sector stock index. Statistical properties of these variables are studied. Both short-run and long-run interactions are analysed. On the short-run, our results indicate that relationships often imply feedbacks. Through the implementation of cointegration analysis, we

M. Aubry; P. Renou-Maissant

2013-01-01

281

Investigation of capacitor voltage transformers  

Microsoft Academic Search

An investigation has been carried out on 330-kV and 132-kV CVTs (capacitor voltage transformers) with seven to ten years of service life. The population total was 148 with an extensive DGA (dissolved gas analysis) testing history. The failures and high DGA results could not be correlated with location operating conditions or associated equipment. Units removed from service for high gas

J. Rungis

1990-01-01

282

21 CFR 312.64 - Investigator reports.  

Code of Federal Regulations, 2013 CFR

... 312.64 Section 312.64 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF...Investigators § 312.64 Investigator reports. (a) Progress reports...clinical investigations. (b) Safety reports . An investigator...

2013-04-01

283

ENVIRONMENTAL INVESTIGATIONS BRANCH STANDARD OPERATING PROCEDURES, 2001  

EPA Science Inventory

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

284

21 CFR 812.45 - Informing investigators.  

Code of Federal Regulations, 2013 CFR

...SERVICES (CONTINUED) MEDICAL DEVICES INVESTIGATIONAL DEVICE EXEMPTIONS Responsibilities of Sponsors § 812.45 Informing investigators. A sponsor shall supply all investigators participating in the investigation with copies of the...

2013-04-01

285

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2012 CFR

...Procedures § 91.44 Investigation. (a) Informal investigation. (1) HHS will investigate... (2) As part of the initial investigation HHS will use informal...signed by the parties and an authorized official...

2012-10-01

286

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2011 CFR

...Procedures § 91.44 Investigation. (a) Informal investigation. (1) HHS will investigate... (2) As part of the initial investigation HHS will use informal...signed by the parties and an authorized official...

2011-10-01

287

32 CFR 147.21 - Expanding investigations.  

Code of Federal Regulations, 2013 CFR

...National Defense 1 2013-07-01 2013-07-01 false Expanding investigations. 147.21 Section 147.21 National...CLASSIFIED INFORMATION Investigative Standards § 147.21 Expanding investigations. Investigations and reinvestigations...

2013-07-01

288

32 CFR 147.21 - Expanding investigations.  

Code of Federal Regulations, 2010 CFR

...National Defense 1 2009-07-01 2009-07-01 false Expanding investigations. 147.21 Section 147.21 National...CLASSIFIED INFORMATION Investigative Standards § 147.21 Expanding investigations. Investigations and reinvestigations...

2009-07-01

289

32 CFR 147.21 - Expanding investigations.  

Code of Federal Regulations, 2010 CFR

...National Defense 1 2010-07-01 2010-07-01 false Expanding investigations. 147.21 Section 147.21 National...CLASSIFIED INFORMATION Investigative Standards § 147.21 Expanding investigations. Investigations and reinvestigations...

2010-07-01

290

Rosetta Radio Science Investigations (RSI)  

NASA Astrophysics Data System (ADS)

The Rosetta spacecraft has been successfully launched on 2nd March 2004 to its new target comet 67 P/Churyumov-Gerasimenko. The science objectives of the Rosetta Radio Science Investigations (RSI) experiment address fundamental aspects of cometary physics such as the mass and bulk density of the nucleus, its gravity field, its interplanetary orbit perturbed by nongravitational forces, its size and shape, its internal structure, the composition and roughness of the nucleus surface, the abundance of large dust grains, the plasma content in the coma and the combined dust and gas mass flux. The masses of two asteroids, Steins and Lutetia, shall be determined during flybys in 2008 and 2010, respectively. Secondary objectives are the radio sounding of the solar corona during the superior conjunctions of the spacecraft with the Sun during the cruise phase. The radio carrier links of the spacecraft Telemetry, Tracking and Command (TT&C) subsystem between the orbiter and the Earth will be used for these investigations. An Ultrastable oscillator (USO) connected to both transponders of the radio subsystem serves as a stable frequency reference source for both radio downlinks at X-band (8.4 GHz) and S-band (2.3 GHz) in the one-way mode. The simultaneous and coherent dual-frequency downlinks via the High Gain Antenna (HGA) permit separation of contributions from the classical Doppler shift and the dispersive media effects caused by the motion of the spacecraft with respect to the Earth and the propagation of the signals through the dispersive media, respectively. The investigation relies on the observation of the phase, amplitude, polarization and propagation times of radio signals transmitted from the spacecraft and received with ground station antennas on Earth. The radio signals are affected by the medium through which the signals propagate (atmospheres, ionospheres, interplanetary medium, solar corona), by the gravitational influence of the planet on the spacecraft and finally by the performance of the various systems involved both on the spacecraft and on ground.

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

2007-02-01

291

QENS investigation of filled rubbers  

NASA Astrophysics Data System (ADS)

The polymer segmental dynamics is investigated in a series of silica-filled rubbers. The presence of inert fillers in polymers greatly affects the mechanical and physical performance of the final materials. For example, silica has been proposed as a reinforcing agent of elastomers in tire production. Results from quasielastic neutron scattering and Dynamic Mechanical Thermal Analysis (DMTA) measurements are presented on styrene-ran-butadiene rubber filled with silica. A clear indication is obtained of the existence of a bimodal dynamics, which can be rationalized in terms of the relaxation of bulk rubber and the much slower relaxation of the rubber adsorbed on the filler surface.

Triolo, A.; Lo Celso, F.; Negroni, F.; Arrighi, V.; Qian, H.; Lechner, R. E.; Desmedt, A.; Pieper, J.; Frick, B.; Triolo, R.

292

[DNA examination for criminal investigation].  

PubMed

The main purpose of DNA examination in a criminal investigation is identification from biological specimen material (sample). Occasionally, DNA genotyping of the sample in which decomposition, pollution, mixture, degeneration, etc., have progressed is requested for identification. In addition, in cases of a small amount of sample, it is not possible to conduct checks many times. The Police Agency in Japan introduced the multiplex PCR system that can detect 15 kinds of STR genotyping and perform sex determination simultaneously using only a small amount of DNA. PMID:20815150

Takahashi, Masanori

2008-11-30

293

New Digital Forensics Investigation Procedure Model  

Microsoft Academic Search

In this paper, we presented a new digital forensics investigation procedure model which is as follows: investigation preparation, classifying cyber crime and deciding investigation priority, investigating damaged (victim) digital crime scene, criminal profiling consultant and analysis, tracking suspects, investigating injurer digital crime scene, summoning suspect, additional investigation, writing criminal profiling, writing report.

Yong-Dal Shin; Cyber Police

2008-01-01

294

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. cija, J.-U. Grabow, J. A. Fernndez, F. Castao, in publication, 2010 E. J. Cocinero, A. Lesarri, P. cija, J.-U. Grabow, J. A. Fernndez, F. Castao, Phys. Chem. Chem. Phys.,in press, 2010

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

2010-06-01

295

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

296

QUANTITATIVE INVESTIGATIONS OF IDIOTYPIC ANTIBODIES  

PubMed Central

The effect of challenge by antigen on persistence of clones of antibody-producing cells and on the induction of new clones was investigated through quantitative measurements of idiotypic specificities. In each of nine rabbits idiotypic specificities present in the earliest bleedings were completely replaced after a few months; subsequent changes occurred much more slowly. On a quantitative basis the population of molecules used as immunogen always reacted most effectively with the homologous anti-idiotypic antiserum. Little effect of increased antigen dose on the rate of change of idiotype was observed. Even large amounts of antigen administered every 2 wk caused only gradual changes in idiotypic specificities. This was attributed either to more effective capture of antigen by memory cells, as compared to precursor cells, or to the induction of tolerance in those clones that were not expressed. In two of three rabbits on a monthly injection schedule, the idiotypic specificities identified underwent very slow changes over a period as long as 17 months. Changes occurred more rapidly when antigen was administered every 2 wk. In each of four rabbits investigated, all idiotypic specificities identified before a 5 month rest period were still present afterwards, indicating the survival of essentially all clones of antibody-producing cells during that interval. Quantitative inhibition data indicated that some new clones of cells were initiated.

Spring, Susan B.; Schroeder, Kenneth W.; Nisonoff, Alfred

1971-01-01

297

Glaciological investigation on Midtdalsbreen, Norway  

NASA Astrophysics Data System (ADS)

Parameters as thermal regimes, velocity, snow variation and melting of the glacier have an impact on the moraine formation in the front of glaciers. The purpose of this exploration was to study how important the glaciological parameters is for the moraine formation in front of Midtdalsbreen in Norway (60? 33'N, 7? 25'E). To investigate the formation, glaciological parameter as temperature and velocity was surveyed. All investigation was accomplished in the ablation area, from the front and 500m inwards. Observations show that the moraine forms in the front was formed with transportation of sediments, wich are freezed under the base of the glacier sole. The transportation take places through the natural flow of the glaciers. Glacier velocity mesurments show that the velocity in the frontal part was approximately 7cm pr. day. Further inwards the velocity was approximately 12cm. Measurements of the thermal regime indicated that the glacier has a cold layer, approximately 15m tick, and had a beneath temperate layer. In the front, where the glacier thickness is lower than 15m thick, the glacier is cold-based. The further indicates that the sediments freeze to the glacier sole, where the glacier thickness is 15 meters or less.

Sorteberg, H. K.

2009-04-01

298

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.

Lee, Yeong Yeh

2012-01-01

299

Analysis of lightning-caused distribution transformer failures  

Microsoft Academic Search

This paper investigates the effects of direct strokes to medium-voltage (MV) lines by analyzing the surges at the primary and secondary sides of a single-phase distribution transformer installed in a typical rural network of the state of Rio Grande do Sul, located in the South of Brazil. The distribution transformers of AES Sul, the electric utility, present a high failure

T. O. de Carvalho; A. Piantini; P. F. Obase; J. M. Janiszewski; E. L. Batista

2011-01-01

300

Arcing behaviour on TMF-contacts at high-current interrupting operations  

Microsoft Academic Search

Vacuum circuit breakers are widely used in the medium voltage area. The majority of the installed vacuum tubes is equipped with electrodes using the transverse magnetic field (TMF) design forcing the electric arc on a circular motion to avoid severe local overheating. A vacuum test switch was used to investigate the arc movement behaviour between spiral-shaped and cup-shaped electrodes at

C. Wolf; M. Kurrat; M. Lindmayer; D. Gentsch

2010-01-01

301

Nuclear California: an investigative report  

SciTech Connect

A team of investigative reporters examines the development of nuclear technology in California since the 1950s and challenges the lack of information on safety and military policy that is made available to the public. The 19 reports cover the potential for accidents caused by human actions or natural causes, terrorism, the nuclear-weapons industry and its relation to national security, and the problems of waste disposal and plant decommissioning. The book concludes with a plan for California to secede from nuclear America on the basis of government-withheld information about the risks. An atlas shows the relationship of earthquake faults and major radioactive material sites, truck and rail routes, and the locations of military and civilian reactors and contractors. A directory of the nuclear industry and a consumer's guide to radiation appear in the appendix. 5 figures, 2 tables. (DCK)

Kaplan, D.E. (ed.)

1982-01-01

302

(Structural investigation of curium bismuthide)  

SciTech Connect

The primary objective of the collaborative studies with EITU was to study curium bismuthide using energy dispersive X-ray diffraction to monitor its structure as a function of pressure. This objective was accomplished and the material was investigated up to 0.48 megabars of pressure. These studies were a continuation of established and productive collaborations between ORNL and EITU. The study of this curium compound is significant in that it is the first 5f-element bismuthide to be studied under pressure. Bismuth has the highest Z and the largest radius of the pnictogen group of elements (important for Hill Plot assessments) and has the greatest potential to form f-p type bonding with actinides under pressure. From a preliminary assessment of our experimental data it has been determined that two structural transitions occurred in the curium bismuthide sample as a result of the applied pressure.

Haire, R.G.

1990-10-12

303

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

304

Phytochemical investigation of Turnera diffusa.  

PubMed

A phytochemical investigation of Turnera diffusa afforded 35 compounds, comprised of flavonoids, terpenoids, saccharides, phenolics, and cyanogenic derivatives, including five new compounds (1-5) and a new natural product (6). These compounds were characterized as luteolin 8-C-E-propenoic acid (1), luteolin 8-C-beta-[6-deoxy-2-O-(alpha-l-rhamnopyranosyl)-xylo-hexopyranos-3-uloside] (2), apigenin 7-O-(6' '-O-p-Z-coumaroyl-beta-d-glucopyranoside) (3), apigenin 7-O-(4' '-O-p-Z-coumaroylglucoside) (4), syringetin 3-O-[beta-d-glucopyranosyl-(1-->6)-beta-d-glucopyranoside] (5), and laricitin 3-O-[beta-d-glucopyranosyl-(1-->6)-beta-d-glucopyranoside] (6). Their structures were determined by spectroscopic and chemical methods. PMID:17284070

Zhao, Jianping; Pawar, Rahul S; Ali, Zulfiqar; Khan, Ikhlas A

2007-02-07

305

Postirradiation investigations at Forschungszentrum Juelich  

SciTech Connect

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

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

1998-09-01

306

A Microscale Gas Trapping Investigation  

NASA Astrophysics Data System (ADS)

Immobilization and trapping of CO2 enhances its geological storage security. The trapping mechanism has been characterized into four main groups: structural, residual, dissolution and mineralization. While structural trapping acts immediately when injection starts and is well investigated, residual and dissolution trapping contribution increase over geological storage time and need to be better understood to develop more accurate models and simulator predictions. Dissolution trapping is controlled by a phase equilibrium process. The local equality of fugacities in the aqueous and the gas phase determines the amount of CO2 to be transferred. Complete dissolution of a single gas bubble can only happen after the continuous gas phase has been disconnected and immobilized by capillary trapping. This process on the other hand is governed by flow rate and pore body to throat size in the porous media. In this study, we focus on an experimental pore-scale investigation of residual and capillary trapping. Our work is a precursor to designing storage processes with enhancing storage security. In the present work, CO2-water imbibition experiments were conducted in visual micromodels whose pore space is geometrically and topologically similar to Berea sandstone. High -resolution, micro-visual data, in the form of photographs and video footage, describes the trapping mechanism and especially the disconnection and shrinkage of the CO2 phase in various phase conditions (gas-liquid-supercritical). During final bubble dissolution, special emphasis was placed on the homogeneous and heterogonous dissolution cases and their impact on storage security. Results show that the depending on the flow rate of the imbibing water different trapping mechanism are observed. Lower rates comparable to the trailing edge of the CO2 plume led to a greater frequency of snap off events and greater trapped residual saturation whereas higher rates comparable to the near wellbore area during enhanced sequestration (CO2-water alternating injection) showed displacement of gas bubbles and greater dissolution rates that ultimately leads to very low or zero gas saturation. Furthermore complete dissolution events showed that homogenous as well as heterogeneous dissolution occurs, whereas the latter could be subdivided into microbubble formation and dissolution on crevices or pore roughness. Based on the observations we can conclude that the type of rock and its roughness as well as the fines present in the brine are important factors determining the dissolution mechanism.

Buchgraber, M.; Kovscek, A. R.

2011-12-01

307

Experimental investigations of drops interaction  

NASA Astrophysics Data System (ADS)

In the present work the problem on influence of hydrodynamic instability of surfactant transfer through drops interfaces on interaction of the drops is experimentally investigated. As against the standard models, where the influence of surfactant on drops interaction on "far" distances is caused by interaction of double electric layers on a surface of drops, the " macroscopical hydrodynamic interaction '' is examined. The problem on stability of an emulsion was investigated experimentally in two statements. In the first problem an alcohol containing aniline drop is placed in water. Dissolution of alcohol is accompanied by allocation of heat and an establishment of concentration and temperature fields around the drop. A bit later a radial field of concentration of alcohol is formed around of the drop. The second drop of aniline (without alcohol) is located on some distance from the first drop. This drop gets in the non-uniform field of concentration of alcohol created by the first drop and, as a result, a non-uniform surface tension is arisen along a surface of a drop. Thus the liquid motion in the drop and in environmental liquid is caused by the Marangoni convection. Arising Marangoni stresses will move the drop along a direction connecting the centers of both drops. In the second problem the drop of aniline is located in an alcohol water solution. As well as earlier, water and aniline are in mutually sated condition; influence of gravity on position of a drop also is excluded with the help of Plateau technique. Around of a drop the radial field of alcohol concentration is formed. The second drop is located on some distance from the first one. In this variant the second drop should move from the first drop. The control of drops parameters and supervision was carried out in a plane-parallel beam of light on experimental setup, which was made on the basis of the schliren device. This assembled setup allowed observing the image of a drop and visualizing the concentration fields. The following basic results were received: 1). At addition of surfactant with negative adsorption in the environmental solution, the weighed drops miss. The distance between drops is proportional to their radius and has difficult dependence on surfactant concentration in solution; 2). At the presence in one of the drops the surfactant with negative adsorption the drops coagulate; 3). The possibilities of changing of emulsions stability by addition of surfactant with positive or negative adsorption in environmental solution or a in a drop is proved experimentally.

Reshetnikov, D. G.

308

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

309

Quantitative investigations of aggregate systems  

NASA Astrophysics Data System (ADS)

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

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

2012-07-01

310

Cold Fusion, A Journalistic Investigation  

NASA Astrophysics Data System (ADS)

Author of the recent book, The Rebirth of Cold Fusion, and founder of New Energy Times, Steven B. Krivit presents a summary of cold fusion's, past, present and possible future. This talk will briefly review five highlights of the recent New Energy Times investigation into cold fusion research:1. Analysis of early studies that supposedly disproved cold fusion.2. Key early corroborations that supported the claims of Fleischmann and Pons.3. The evolving understanding of cold fusion reaction paths and by-products.4. A look at volumetric power density.5. Brief comparison of the progress in hot fusion research as compared to cold fusion research.New Energy Times, founded in 2000, is an independent communications company which currently specializes in reporting on cold fusion researchootnotetextReferences and copies of the presentation are available at www.newenergytimes.com/reports/aps2005.htmhttp://www.newenergytimes.com/reports/aps2005.htm. It has no affiliations with any organization, entity or party which invests in these technologies, nor any individual researcher or research facility.

Krivit, Steven B.

2005-03-01

311

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

312

Investigations on Flexible Multiferroic Composites  

NASA Astrophysics Data System (ADS)

Multiferroic ceramics are one of the most attractive materials for the next generation computer memories, smart sensors, and high frequency microelectronic devices. As compared to single phase multiferroic, piezoelectric-magnetostrictive composite materials exhibit larger magnetoelectric coefficients and therefore better suited for practical applications. In the present paper, we have provided a brief introduction on the multiferroic electro-ceramics followed by the outline of recent research trends on these materials. The potentials of flexible polymer-magnetostrictive composite materials, synthesized by economic chemical based processing routes, has been outlined. To make flexible multiferroic composites, cobalt iron oxide (CoFe2O4) (CFO) spinel powders were synthesized by a polymer assisted decomposition route. The cation mixing in as prepared as well as calcined CFO powders were investigated by XRD Rietveld refinement. Guided by the structural refinement results the processing conditions of the powder synthesis were optimized to yield spinal CFO powder with improved magnetic properties. These powders were dispersed into ferroelectric polyvinyledene (PVDF) matrix and the polymer-spinal composite was cast using different weight fractions of the spinel component. The composites were characterized in terms of its structure and microstructure. Preliminary dielectric and magnetic properties of these CFO-polymer composites is reported.

Roy, Subhasis; Biswas, Bulbul; Majumder, S. B.

2008-10-01

313

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

314

Molecular dynamics investigation on tin  

NASA Astrophysics Data System (ADS)

Laser-produced tin (Sn) plasma has been considered as one of main candidates for extreme ultraviolet (EUV) light source used in EUV lithography. In order to increase conversion efficiency and to mitigate energetic ions and neutral from laser-produced Sn plasma, fundamental investigation is necessary. Theoretical study by means of hydrodynamic simulation is expected to guide us to optimize Sn target and pumping conditions. Equation of state of materials is an inevitable ingredient of all hydrodynamic simulations. However, the early stages of the laser-matter interaction process, equation of state at phase transition, for example, liquid-vapor transition, and the ejection of particles are remain unexplored. The aim of this research is to report the simulated properties of Sn over wide physical conditions by means of Materials Studio code and a 3D homemade molecular dynamics code developed for this purpose. Results have shown transient effects on the phase transitions. The simulation results are compared to experimental data obtained by pulsed laser ablation of Sn. Velocity distributions of evaporated particles from the Sn are discussed as a function of laser fluence. Also, the equation of state has been tabulated in warm dense region.

Masnavi, M.; Parchamy Araghy, H.; Ghoranneviss, M.; Nakajima, M.; Endo, A.; Horioka, K.

2010-11-01

315

15 CFR 20.13 - Investigation.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Investigation. 20.13 Section 20.13...RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 20.13 Investigation. (a) Informal...

2012-01-01

316

30 CFR 50.11 - Investigation.  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

317

14 CFR 1252.403 - Investigation.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Investigation. 1252.403 Section 1252...RECEIVING FEDERAL FINANCIAL ASSISTANCE Investigation, Conciliation, and Enforcement Procedures § 1252.403 Investigation. (a) Informal...

2012-01-01

318

42 CFR 455.14 - Preliminary investigation.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Preliminary investigation. 455.14 Section 455.14 Public... Medicaid Agency Fraud Detection and Investigation Program § 455.14 Preliminary investigation. If the agency receives a...

2012-10-01

319

48 CFR 222.406-8 - Investigations.  

Code of Federal Regulations, 2012 CFR

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

2012-10-01

320

37 CFR 11.22 - Disciplinary investigations.  

Code of Federal Regulations, 2013 CFR

...Disciplinary investigations. (a) The OED Director is authorized to investigate possible...An investigation may be initiated when the OED Director receives a grievance, information...report the information or evidence to the OED Director. The OED Director may...

2013-07-01

321

21 CFR 812.46 - Monitoring investigations.  

Code of Federal Regulations, 2013 CFR

...EXEMPTIONS Responsibilities of Sponsors § 812.46 Monitoring investigations... (a) Securing compliance. A sponsor who discovers that an investigator...participation in the investigation. A sponsor shall also require such an...

2013-04-01

322

What Is Not Fair with Investigations?  

ERIC Educational Resources Information Center

|Defines six types of investigations: (1) classifying and identifying; (2) fair testing; (3) pattern seeking; (4) exploring; (5) investigating models; and (6) making things or developing systems. Challenges the dominance of fair testing in school science investigations. (Author/WRM)|

Watson, Rod; Goldsworthy, Anne; Wood-Robinson, Valerie

1999-01-01

323

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2011 CFR

...Procedures § 7.943 Investigation. (a) Informal investigation. (1) FEMA will... (2) As part of the initial investigation, FEMA will use informal...signed by the parties and an authorized official...

2011-10-01

324

44 CFR 7.943 - Investigation.  

Code of Federal Regulations, 2012 CFR

...Procedures § 7.943 Investigation. (a) Informal investigation. (1) FEMA will... (2) As part of the initial investigation, FEMA will use informal...signed by the parties and an authorized official...

2012-10-01

325

Numerical Investigation of Circumplanetary Disks  

NASA Astrophysics Data System (ADS)

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

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

2012-10-01

326

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

327

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

328

Athena Mars rover science investigation  

NASA Astrophysics Data System (ADS)

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

Squyres, Steven W.; Arvidson, Raymond E.; Baumgartner, Eric T.; Bell, James F.; Christensen, Philip R.; Gorevan, Stephen; Herkenhoff, Kenneth E.; Klingelhfer, Gstar; Madsen, Morten Bo; Morris, Richard V.; Rieder, Rudolf; Romero, Raul A.

2003-12-01

329

Tribochemical investigation of microelectronic materials  

NASA Astrophysics Data System (ADS)

To achieve efficient planarization with reduced device dimensions in integrated circuits, a better understanding of the physics, chemistry, and the complex interplay involved in chemical mechanical planarization (CMP) is needed. The CMP process takes place at the interface of the pad and wafer in the presence of the fluid slurry medium. The hardness of Cu is significantly less than the slurry abrasive particles which are usually alumina or silica. It has been accepted that a surface layer can protect the Cu surface from scratching during CMP. Four competing mechanisms in materials removal have been reported: the chemical dissolution of Cu, the mechanical removal through slurry abrasives, the formation of thin layer of Cu oxide and the sweeping surface material by slurry flow. Despite the previous investigation of Cu removal, the electrochemical properties of Cu surface layer is yet to be understood. The motivation of this research was to understand the fundamental aspects of removal mechanisms in terms of electrochemical interactions, chemical dissolution, mechanical wear, and factors affecting planarization. Since one of the major requirements in CMP is to have a high surface finish, i.e., low surface roughness, optimization of the surface finish in reference to various parameters was emphasized. Three approaches were used in this research: in situ measurement of material removal, exploration of the electropotential activation and passivation at the copper surface and modeling of the synergistic electrochemical-mechanical interactions on the copper surface. In this research, copper polishing experiments were conducted using a table top tribometer. A potentiostat was coupled with this tribometer. This combination enabled the evaluation of important variables such as applied pressure, polishing speed, slurry chemistry, pH, materials, and applied DC potential. Experiments were designed to understand the combined and individual effect of electrochemical interactions as well as mechanical impact during polishing. Extensive surface characterization was performed with AFM, SEM, TEM and XPS. An innovative method for direct material removal measurement on the nanometer scale was developed and used. Experimental observations were compared with the theoretically calculated material removal rate values. The synergistic effect of all of the components of the process, which result in a better quality surface finish was quantitatively evaluated for the first time. Impressed potential during CMP proved to be a controlling parameter in the material removal mechanism. Using the experimental results, a model was developed, which provided a practical insight into the CMP process. The research is expected to help with electrochemical material removal in copper planarization with low-k dielectrics.

Kulkarni, Milind Sudhakar

330

Policy and Guidelines for Investigational Agent Distribution  

Cancer.gov

The Division of Cancer Prevention (DCP) provides investigational agents for use in DCP approved protocols to participating investigators with a current signed FDA 1572 (MS Word doc) on file with DCP. Orders will only be shipped to the shipping address indicated on the investigators FDA form 1572.

331

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

332

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2012 CFR

...Section 300.41 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...

2012-10-01

333

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2011 CFR

...Section 300.41 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...

2011-10-01

334

29 CFR 1986.104 - Investigation.  

Code of Federal Regulations, 2013 CFR

...PROCEDURES FOR THE HANDLING OF RETALIATION COMPLAINTS UNDER THE EMPLOYEE PROTECTION PROVISION OF THE SEAMAN'S PROTECTION ACT (SPA), AS AMENDED Complaints, Investigations, Findings, and Preliminary Orders § 1986.104 Investigation....

2013-07-01

335

Experimental Investigations on Anhydrite. Report No. 2.  

National Technical Information Service (NTIS)

Results of investigations of Swiss anhydrite rock are presented. The investigations concerning the mechanical behavior of anhydrite show that its stability is heavily dependent on the grain size and the structure. Other stability-determining factors such ...

W. H. Mueller U. Briegel

1977-01-01

336

Instrumentation for the Hydrogeological Investigation Programme.  

National Technical Information Service (NTIS)

The groundwater measurements during the operation stage are mainly included in an automatic data acquisition system, designed for the thermal investigations of the water in the rock cavern. For the hydrogeological investigations, eight boreholes were equi...

B. Fogdestam L. Saernblad T. Olsson

1984-01-01

337

Tracer Investigations of Catalytic Reactions of Hydrocarbons.  

National Technical Information Service (NTIS)

Tracer techniques with sup 14 C-labelled compounds were used to investigate the isomerization of C sub 8 -aromatics and reforming of light gasoline. The investigations aimed at determining the selectivity of newly developed catalysts and at elucidating th...

J. Dermietzel

1984-01-01

338

IND Applications for Clinical Investigations: Previous Human ...  

Center for Drug Evaluation (CDER)

... If an investigational drug has been investigated or marketed previously, either in the United States or other countries, detailed information about ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

339

Geomorphic Investigation of Montgomery Point, Arkansas.  

National Technical Information Service (NTIS)

This study provides a geomorphic foundation for a cultural resource investigation of the proposed rock and dam site. Specific objectives of this investigation are to identify and define the major geomorphic features and processes in the study area, recons...

J. B. Dunbar

1993-01-01

340

IND Applications for Clinical Investigations: Overview  

Center for Drug Evaluation (CDER)

... IND Applications for Clinical Investigations: Overview. ... Review Time for initial submission of an ... may proceed with a clinical investigation once the ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

341

49 CFR 31.4 - Investigation.  

Code of Federal Regulations, 2012 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2012-10-01

342

43 CFR 35.4 - Investigation.  

Code of Federal Regulations, 2012 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2012-10-01

343

6 CFR 13.4 - Investigation.  

Code of Federal Regulations, 2012 CFR

...findings and conclusions of such investigation to the Reviewing Official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...Official to report violations of criminal law to the Attorney...

2012-01-01

344

The Criminal Investigation Process: A Summary Report.  

National Technical Information Service (NTIS)

The criminal investigation process in municipal and county police departments was studied by survey, interviews and observations, and special data collection. Investigators spend about 7% of their time on activities that lead to solving crimes. Case solut...

J. M. Chaiken P. W. Greenwood J. Petersilia

1976-01-01

345

49 CFR 31.4 - Investigation.  

Code of Federal Regulations, 2011 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2011-10-01

346

15 CFR 25.4 - Investigation.  

Code of Federal Regulations, 2012 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2012-01-01

347

7 CFR 1.304 - Investigation.  

Code of Federal Regulations, 2012 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (h) Nothing...official to report violations of criminal law to the Attorney...

2012-01-01

348

45 CFR 79.4 - Investigation.  

Code of Federal Regulations, 2012 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2012-10-01

349

43 CFR 35.4 - Investigation.  

Code of Federal Regulations, 2011 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2011-10-01

350

45 CFR 79.4 - Investigation.  

Code of Federal Regulations, 2011 CFR

...findings and conclusions of such investigation to the reviewing official...to avoid interference with a criminal investigation or prosecution. (d) Nothing...official to report violations of criminal law to the Attorney...

2011-10-01

351

Guidance for Industry: Investigational New Drug Applications ...  

Center for Biologics Evaluation and Research (CBER)

Text Version... and FDA Staff Investigational New Drug Applications (INDs) for Minimally ... Investigational New Drug Applications (INDs) for Minimally ... More results from www.fda.gov/downloads/biologicsbloodvaccines/guidancecomplianceregulatoryinformation

352

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

353

46 CFR 298.15 - Investigation fee.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Investigation fee. 298.15 Section 298.15...GUARANTEES Eligibility § 298.15 Investigation fee. (a) In general. Before...Letter Commitment, you shall pay us an investigation fee. The Letter Commitment...

2012-10-01

354

41 CFR 101-39.403 - Investigation.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2007-07-01 true Investigation. 101-39.403 Section 101-39...4-Accidents and Claims § 101-39.403 Investigation. (a) Every accident involving...when deemed necessary. Should such investigation develop additional information,...

2011-07-01

355

49 CFR 260.11 - Investigation charge.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Investigation charge. 260.11 Section 260...FINANCING PROGRAM Overview § 260.11 Investigation charge. (a) Applicants for financial...this part may be required to pay an investigation charge of up to one-half of...

2011-10-01

356

40 CFR 68.81 - Incident investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Incident investigation. 68.81 Section 68.81 Protection...Prevention Program § 68.81 Incident investigation. (a) The owner or operator...regulated substance. (b) An incident investigation shall be initiated as promptly...

2011-07-01

357

49 CFR 659.35 - Investigations.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Investigations. 659.35 Section 659.35 ...State Oversight Agency § 659.35 Investigations. (a) The oversight agency...oversight agency must use its own investigation procedures or those that have...

2011-10-01

358

49 CFR 659.35 - Investigations.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Investigations. 659.35 Section 659.35 ...State Oversight Agency § 659.35 Investigations. (a) The oversight agency...oversight agency must use its own investigation procedures or those that have...

2012-10-01

359

46 CFR 298.15 - Investigation fee.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Investigation fee. 298.15 Section 298.15...GUARANTEES Eligibility § 298.15 Investigation fee. (a) In general. Before...Letter Commitment, you shall pay us an investigation fee. The Letter Commitment...

2011-10-01

360

40 CFR 68.60 - Incident investigation.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Incident investigation. 68.60 Section 68.60 Protection...Prevention Program § 68.60 Incident investigation. (a) The owner or operator...catastrophic release. (b) An incident investigation shall be initiated as promptly...

2011-07-01

361

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. Ciardhuin

2004-01-01

362

Chemistry. 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 19 chemistry investigations found in the student manual. These investigations focus on concepts related to:

Renner, John W.; And Others

363

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

364

Chemistry. 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 19 chemistry investigations found in the student manual. These investigations focus on concepts related to:

Renner, John W.; And Others

365

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

366

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

367

Extended automatic reasoning of criminal investigation  

Microsoft Academic Search

This paper proposes an extended fuzzy reasoning principle (EFRP) for criminal investigation and a new framework for automatic reasoning based on extension relationship mapping. We develop a conceptual model of the cognitive abilities that a criminal investigator uses during a criminal investigation. Two mapping models are set up by constructing a pattern on practical crime model and on-the-spot model respectively.

Jin Li; Ping He

2009-01-01

368

Investigation of Allegations of Cheating on FBI's Domestic Investigations and Operations Guide (DIOG) Exam.  

National Technical Information Service (NTIS)

In December 2008, the Federal Bureau of Investigation (FBI) implemented a new Domestic Investigations and Operations Guide (DIOG), which described the procedures its employees must follow when conducting domestic investigations. The DIOG replaced several ...

2010-01-01

369

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

370

Final Rule: Investigational New Drug Safety Reporting ...  

Center for Drug Evaluation (CDER)

... The Food and Drug Administration is issuing final regulations addressing the safety reporting requirements for investigational new drug ... More results from www.fda.gov/drugs/developmentapprovalprocess/howdrugsaredevelopedandapproved

371

49 CFR 1503.203 - Investigations.  

Code of Federal Regulations, 2011 CFR

... Section 1503.203 Transportation Other Regulations Relating to Transportation (Continued) TRANSPORTATION SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY ADMINISTRATIVE AND PROCEDURAL RULES INVESTIGATIVE AND...

2011-10-01

372

Investigating the Mathematical Process with Nonlinear Asymptotes  

ERIC Educational Resources Information Center

Under the backdrop of the investigation of rational functions and their respective curved asymptotes, the reader is invited to experience the mathematical process alongside the authors and observe the application of the NCTM Process Standards and the use of multiple representations in the investigation and solution of a problem. (Contains 9

Bosse, Michael J.; DeUrquidi, Karen A.; Edwards, David L.; Nandakumar, N. R.

2008-01-01

373

Traumatic stress of multiple murder investigations  

Microsoft Academic Search

The investigation of multiple murders is becoming increasingly common to America's communities. With the response to and investigation of such crimes comes significant and unique stress to law enforcement personnel. Such stressors fall into two broad categories: organizational and event. Successful management of this unique type of law enforcement stress requires a strong organizational commitment, specific management programs involving training

James D. Sewell

1993-01-01

374

NASA Heavy Lift Rotorcraft Systems Investigation  

Microsoft Academic Search

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

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

375

Difficulties Confronting Young Children Undertaking Investigations  

Microsoft Academic Search

One approach to providing a mathematically rich curriculum is to involve young children in mathematical investigations in which they engage in the exploration of meaningful problems, and problem posing. However, there is limited research on how teachers can facilitate young children's learning through investigations. This study explored the difficulties seven-to-eight year old students experienced when they began an investigatory program.

Carmel M Diezmann; James J Watters; Lyn D English

376

Fostering new investigators in Reproductive Immunology  

Microsoft Academic Search

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

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

2011-01-01

377

Investigating Child Language Acquisition through Computational Modelling  

Microsoft Academic Search

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

Kris Jack; Chris Reed; Annalu Waller

378

Multinational seismic investigation focuses on Rabaul volcano  

Microsoft Academic Search

An improved disaster-reduction strategy for civil authorities and communities on the Gazelle Peninsula in Papua New Guinea is anticipated as a result of a multinational seismic investigation now under way there. Data collection has been completed but interpretation is at a preliminary stage. Volcanic eruptions in 1994 devastated the town of Rabaul and other communities on the peninsula.The investigation, known

O. Gudmundsson; R. W. Johnson; D. M. Finlayson; Y. Nishimura; H. Shimamura; A. Terashima; I. Itikarai; C. Thurber

1999-01-01

379

Investigation of Terra Cotta artefacts with terahertz  

NASA Astrophysics Data System (ADS)

Terahertz Time Domain Imaging has been used in the last few years for the investigation of cultural heritage. In this article, the authors demonstrate the possibility to apply it for the investigation of clay artifacts. Tomographic images were obtained of a model in reflection, and an Egyptian vessel in transmission.

Labaune, Julien; Jackson, J. Bianca; Fukunaga, Kaori; White, Jeffrey; D'Alessandro, Laura; Whyte, Alison; Menu, Michel; Mourou, Gerard

2011-10-01

380

25 Low-Cost Biology Investigations.  

ERIC Educational Resources Information Center

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

Beller, Joel

381

Beam investigations at a multicusp ion source  

Microsoft Academic Search

In cooperation with the Lawrence Berkeley Laboratory, a multicusp ion source has been investigated. The goal of these investigations is to generate a nearly pure atomic nitrogen (N+) ion beam. To achieve this, the discharge chamber is divided into two parts of different plasma parameters by means of a filter magnetic field. As beam diagnostics, a bending magnet and a

K. Volk; H. Klein; K. N. Leung

1992-01-01

382

Cognitive failure analysis for aircraft accident investigation  

Microsoft Academic Search

The present studies were undertaken to investigate the applicability of an information processing approach to human failure in the aircraft cockpit. Using data obtained from official aircraft accident investigation reports, a database of accidents and incidents involving New Zealand civil aircraft between 1982 and 1991 was compiled. In the first study, reports were coded into one of three error stages

DAVID OHARE; MARK WIGGINS; RICHARD BATT; DIANNE MORRISON

1994-01-01

383

Investigative Journalism and the Moral Order.  

ERIC Educational Resources Information Center

|Examines how investigative journalists work within the unresolved tension between detached observation and active moral agency. Concludes that investigative journalism may oversee the reinforcement of dominant moral values, but may also preside over the definition and development, as well as the debasement and dissolution, of those values. (MS)|

Glasser, Theodore L.; Ettema, James S.

1989-01-01

384

Investigative Journalism Techniques. Evaluation Guide Number 6.  

ERIC Educational Resources Information Center

|Noting that program evaluators can profit by adopting the investigative journalist's goal of discovering hidden information, this guide explores the journalist's investigative process--without its element of suspicion--and discusses how components of this process can be applied to program evaluation. After listing the major characteristics of the

St. John, Mark

385

Serial Murder Investigation: Prospects for Police Networking  

Microsoft Academic Search

The intention of this article is to explore current impediments to networking which have impeded investigation and apprehension efforts in serial murder cases and to present alternatives for the future which could significantly impact upon arrests. The analysis first focuses upon a case history of the investigation in one serial murder case with a secondary discussion of corresponding networking problems

Thomas OReilly-Fleming

1992-01-01

386

Lifetime investigation of high power IGBT modules  

Microsoft Academic Search

This article concerns lifetime investigation of high power IGBT modules. Other research investigating windturbine failures of modern wind turbines observed that the power converter counts for 15 % of all failures. A test bench capable of testing the IGBT power modules in an accelerated application specific working point was constructed. The working point was given with regards to voltage, current,

Jens Due; Stig Munk-Nielsen; Rasmus Nielsen

2011-01-01

387

Investigations of the software testing coupling effect  

Microsoft Academic Search

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

A. Jefferson Offutt

1992-01-01

388

Investigation of regenerable sorbents for CO capture  

Microsoft Academic Search

An experimental investigation was undertaken in pursuit of identifying novel dry, regenerable scrubbing processes for the capture of CO from a gaseous stream. Recent investigations by Japanese researchers have identified supported alkali carbonate materials that can remove CO in the presence of water vapor to form an alkali bicarbonate. The sorbent is thermally regenerated by heating, yielding CO and HO

J. S. Hoffman; H. W. Pennline

1999-01-01

389

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.

390

The lessons of the Challenger investigations  

Microsoft Academic Search

It is pointed out that, both in methodology and in findings, the investigations of the Challenger disaster by a Presidential Commission and by a Congressional committee demonstrate that even in highly technical matters meaning is socially constructed. The author examines the evidence and testimony before the investigating bodies and finds that, before the launch, NASA officials construed information about O-ring

Paul M. Dombrowski

1991-01-01

391

Waco investigation: analysis of FLIR videotapes  

Microsoft Academic Search

This paper presents some of the image processing techniques that were applied to seek an answer to the question whether agents of the Federal Bureau of Investigation (FBI) directed gunfired against the Branch Davidian complex in the tragic event that took place in Waco, Texas, U.S., 1993. The task for this investigation was to provide a scientific opinion that clarified

Lena M. Klasen

2001-01-01

392

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

393

Investigating Elementary Teachers' Conceptions of Animal Classification  

ERIC Educational Resources Information Center

|Numerous studies have been conducted regarding alternative conceptions about animal diversity and classification, many of which have used a cross-age approach to investigate how students' conceptions change over time. None of these studies, however, have investigated teachers' conceptions of animal classification. This study was intended to

Burgoon, Jacob N.; Duran, Emilio

2012-01-01

394

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.

395

Online Investigation of SMEs Competitive Advantage  

Microsoft Academic Search

Although much has been done about competitiveness of SMEs in the last years, there are many open questions. In this paper we set out to use public Internet information and investigate big number of companies web sites. We present a methodology that uses a business intelligence tool for online data collection and analytics for investigation. The goal is to use

Petko Ruskov; Kaloyan Haralampiev; Lachesar Georgiev

396

Investigation of Propulsive Aspects of Mach Effects  

SciTech Connect

Results of a continuing investigation of the propulsive potential of Mach effects - the fluctuation of the rest masses of objects that store internal energy as they are accelerated by external forces - obtained in the past year or so are reported. Two chief lines of investigation have been pursued: testing Mach-Lorentz thrusters (MLTs) and exploration of the 'bulk acceleration' conjecture.

Woodward, James F. [Department of Physics California State University Fullerton Fullerton, CA 92834 714-278-3596 (United States)

2009-03-16

397

Outdoor Education: Issues & Investigations, 5-8.  

ERIC Educational Resources Information Center

|Designed to familiarize Oklahoma students with their environment by providing opportunities for exploration, investigation, and evaluation, this outdoor education guide contains suggested activities to be used as a starting point to arouse the interest and curiosity of students through direct observation and investigation. As an additional

Boules, Allen, Ed.

398

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

399

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

400

A cyber-crime investigation framework  

Microsoft Academic Search

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

Vasilios Katos; Peter M. Bednar

2008-01-01

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

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

403

Gravitation and celestial mechanics investigations with Galileo  

Microsoft Academic Search

The gravitation and celestial mechanics investigations during the cruise phase and Orbiter phase of the Galileo mission depend on Doppler and ranging measurements generated by the Deep Space Network (DSN) at its three spacecraft tracking sites in California, Australia, and Spain. Other investigations which also rely on DSN data, and which like ours fall under the general discipline of spacecraft

J. W. ARMSTRONG; J. K. Campbell; F. B. Estabrook; T. P. Krisher; E. L. Lau

1992-01-01

404

Criminal profiling in the investigative process  

Microsoft Academic Search

Extract: In recent years, criminal profiling has received a great deal of attention from both the popular media and professional circles. However, the application of criminal profiling to the investigative process is still misunderstood. A criminal profile can offer more to an investigation than is realised by many individuals. These services include, but are by no means limited to, victimological

Andrew Lowe

2002-01-01

405

ENGINEERING ASPECTS OF WATERBORNE DISEASE INVESTIGATIONS  

EPA Science Inventory

As part of a disease outbreak investigation involving drinking water, an engineering investigation may be necessary to determine how or why the pathogen of concern was able to get to the consumer. In many of the US outbreaks, the survival of the pathogen was dependent on multiple...

406

Investigations on Paraquat Toxicity in Fishes  

Microsoft Academic Search

The effect of paraquat in different concentrations on three fish species, carp (Cyprinus carpio L.) silver carp (Hypophthalmichthys molitrix V.) and sheatfish (Silurus glanis L.) with different feeding habits was investigated.The harmful effect of the chemical investigated was determined by measuring transaminase, lactate dehydrogenase and acetylcholinesterase enzyme activities in blood sera. Paraquat significantly increased transaminase and lactate dehydrogenase activity and

Jnos Nemcsk; Laszlo Orbn; Bla Asztalos; Zsuzsanna Buzs; Agnes Nmeth; Laszlo Boross

1985-01-01

407

How Might You Investigate Scientific Phenomena?  

NSDL National Science Digital Library

This site, part of Exploring Earth Investigation by McDougal Littell and TERC, examines how to investigate scientific phenomena. The investigations "were designed to build students' knowledge of Earth Science conceptsâ¦and to raise student awareness of Earth as a system of interconnected components and processes." Here, visitors will learn about the steps that allow scientists to create valid investigations of phenomena: forming a hypothesis, determining the appropriate method of investigation, collecting and graphing data, and hypothesis testing. Many sections have illustrative images and interactive features which help students understand the topics presented, and the final section ends with questions for students to further explore as well as a link to some NASA datasets. This is an excellent site for any Earth Science classroom as an introductory lecture to the scientific method or as an out-of-class exploration for students.

2008-09-05

408

Internal investigations: a proactive approach to compliance.  

PubMed

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

Schillaci, A; Radler, L

2000-09-01

409

Field and laboratory investigations of selenium transformation  

SciTech Connect

This quarterly report discusses the preparation and results of a field investigation of a selected coal mine site in Oklahoma. The field investigation has been on-going since July 1990. An analysis of this data would be useful in providing information for potential Se mobility from a coal mine site and the distribution of Se in a soil profile of reclaimed land. Also, included is the investigation and preliminary results of SeO{sub 3}{sup 2{minus}} adsorption and desorption using different soil media, including coal mine spoils (overburden).

Atalay, A.; Koll, K.J.

1990-12-01

410

SRP baseline hydrogeologic investigation: Aquifer characterization  

SciTech Connect

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

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

1992-03-31

411

Methods and Strategies: Developing Investigative Skills Purposefully  

NSDL National Science Digital Library

Members of a team of educators and university students participating in the project, Pittsburgh Partnership for Energizing Science in Urban Schools, addressed the issue of helping students develop investigative skills within the context of an introductory science unit for fourth graders. The unit focuses on data-collection techniques and is a component of the district's required curriculum. It contains four hands-on investigations, each involving a different technique: rubbing, carbon printing, chromatography, and reflecting. The approach described here can be used as a model to transform the skills learned in a science classroom from general to investigative ones.

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

2007-11-01

412

Investigations into the Reliability of Electrophotography.  

National Technical Information Service (NTIS)

Investigations into corona-discharge photography show that subjects placed in a high-voltage field exhibit corona that may be recorded photographically. The corona formation and structure depend on the applied field strength and gradient, the type of film...

D. Faust G. L. Gross H. J. Kyler J. O. Pehek

1975-01-01

413

49 CFR 225.31 - Investigations.  

Code of Federal Regulations, 2011 CFR

...concerning accidents/incidents under investigation, to make inquiries of persons having knowledge of the facts, conduct interviews and inquiries, and attend as an observer, hearings conducted by railroads. When necessary to carry out an...

2011-10-01

414

12 CFR 308.503 - Investigations.  

Code of Federal Regulations, 2013 CFR

... 308.503 Section 308.503 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF PRACTICE AND PROCEDURE Program Fraud Civil Remedies and Procedures § 308.503 Investigations....

2013-01-01

415

Acoustic Emission Investigation - Helicopter Rotor System.  

National Technical Information Service (NTIS)

An investigation was carried out to determine the feasibility of detecting fatigue crack initiation and growth in dynamically loaded helicopter rotor systems. This was accomplished by first conducting laboratory tests to determine fatigue emission charact...

R. M. Rusnak H. C. Yee J. K. Sen

1976-01-01

416

PILOT INVESTIGATION OF SECONDARY SLUDGE DEWATERING ALTERNATIVES  

EPA Science Inventory

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

417

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.

418

Kenyan Students are Guided into Investigative Journalism.  

ERIC Educational Resources Information Center

|Discusses the difficulties encountered by public affairs reporting students in Kenya when trying to obtain information from public officials. Describes the alternative investigative methods devised in individual tutorial sessions with the students and instructor and the results. (HTH)|

Scotton, James F.

1986-01-01

419

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.

420

14 CFR 1260.35 - Investigative Requirements.  

Code of Federal Regulations, 2012 CFR

...Investigative Requirements January 2004 (a) NASA reserves the right to perform security checks and to deny or restrict access to a NASA Center, facility, or computer system, or to NASA technical information, as NASA deems...

2012-01-01

421

77 FR 51943 - Procedures for Safety Investigations  

Federal Register 2010, 2011, 2012, 2013

...DEFENSE NUCLEAR FACILITIES SAFETY BOARD 10 CFR Part 1708 Procedures...Investigations AGENCY: Defense Nuclear Facilities Safety Board. ACTION: Proposed...SUMMARY: The Defense Nuclear Facilities Safety Board is extending the...

2012-08-28

422

Mathematical Investigations Using Logo: Part 1.  

ERIC Educational Resources Information Center

|Describes investigations involving data acquisition and analysis using microcomputers running the LOGO programing language. Provides new primitives to add to LOGO to access information from the analog to digital converter of a BBC microcomputer, giving samples of student results. (JM)|

Brown, Ken

1986-01-01

423

29 CFR 1984.104 - Investigation.  

Code of Federal Regulations, 2013 CFR

...OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT...UNDER SECTION 1558 OF THE AFFORDABLE CARE ACT Complaints, Investigations...general provisions of the Affordable Care Act under which...United States Department of Health and Human...

2013-07-01

424

Preliminary Investigation of Profiling Tools and Methods.  

National Technical Information Service (NTIS)

The purpose of this technical memorandum is to outline the proposed component of project 15AG: Canadian Forces (CF) Enhanced Influence Operations and the preliminary investigation of profiling tools for CF application and purposes. There are several diffe...

A. Hawton C. Powlesland K. Richards Q. Lam W. Sullivan-Kwantes

2011-01-01

425

Investigation of Optical Print Media: Initial Survey.  

National Technical Information Service (NTIS)

The investigation describes the characteristics and properties of several optical papers suitable for optical printing. 3M Dry Silve Papers are discussed alont with Kodak's Linagraph paper. Special ultraviolet imaging paper developed by DuPont are discuss...

D. D. Curry

1972-01-01

426

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

427

Guide for Explosion and Bombing Scene Investigation.  

National Technical Information Service (NTIS)

The investigation conducted at the scene of an explosion or bombing plays a vital role in uncovering the truth about the incident. The evidence recovered can be critical in identifying, charging, and ultimately convicting suspected criminals. For this rea...

2000-01-01

428

7 CFR 248.19 - Investigations.  

Code of Federal Regulations, 2013 CFR

... FOOD AND NUTRITION SERVICE, DEPARTMENT OF AGRICULTURE CHILD NUTRITION PROGRAMS WIC FARMERS' MARKET NUTRITION PROGRAM...investigation, proceeding, or hearing under this part. The identity of every complainant shall be kept confidential except to...

2013-01-01

429

7 CFR 249.19 - Investigations.  

Code of Federal Regulations, 2013 CFR

... FOOD AND NUTRITION SERVICE, DEPARTMENT OF AGRICULTURE CHILD NUTRITION PROGRAMS SENIOR FARMERS' MARKET NUTRITION PROGRAM...investigation, proceeding, or hearing under this Part. The identity of every complainant shall be kept confidential except to...

2013-01-01

430

7 CFR 948.31 - Investigation.  

Code of Federal Regulations, 2013 CFR

...SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE IRISH POTATOES GROWN IN COLORADO Order Regulating Handling Exemptions § 948.31 Investigation. An area committee shall be permitted at any time...

2013-01-01

431

Further Investigations of Oblique Hypervelocity Impact Phenomena.  

National Technical Information Service (NTIS)

The results of a continuing investigation of the phenomena associated with the oblique hypervelocity impact of spherical projectiles onto multi-sheet aluminum structures are described. A series of equations that quantitatively describes these phenomena is...

W. P. Schonberg

1988-01-01

432

Mlg Receives 2009 Cryosphere Young Investigator Award  

NASA Astrophysics Data System (ADS)

Thomas Mlg received the 2009 Cryosphere Young Investigator Award at the 2009 AGU Fall Meeting, held 14-18 December in San Francisco, Calif. The award is for a significant contribution to cryospheric science and technology.

Kaser, Georg; Mlg, Thomas

2010-05-01

433

Experimental Investigation of Centrifugal Compressor Stabilization Techniques.  

National Technical Information Service (NTIS)

Results from a series of experiments to investigate techniques for extending the stable flow range of a centrifugal compressor are reported. The research was conducted in a high-speed centrifugal compressor at the NASA Glenn Research Center. The stabilizi...

G. J. Skoch

2003-01-01

434

Investigating Automotive Gear Lubricant Copper Corrosivity.  

National Technical Information Service (NTIS)

An investigation was initiated to identify relationships between copper strip ratings and organic acidity/alkalinity values for gear oils meeting both military and commercial factory-fill specifications. No correlation was found to exist between organic a...

J. V. Shimek M. E. LePera

1973-01-01

435

Computational Investigation of Subsonic Torsional Airfoil Flutter.  

National Technical Information Service (NTIS)

In this thesis single-degree-of-freedom torsional airfoil flutter is investigated using an incompressible potential flow code, a compressible inviscid Euler code and a compressible viscous Navier-Stokes code. It is found that the classical linearized inco...

C. Kakkavas

1998-01-01

436

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...

437

Software Reliability Experiments Data Analysis and Investigation.  

National Technical Information Service (NTIS)

The objectives are to investigate the fundamental reasons which cause independently developed software programs to fail dependently, and to examine fault tolerant software structures which maximize reliability gain in the presence of such dependent failur...

J. L. Walker A. K. Caglayan

1991-01-01

438

Mass Spectrometric Investigations on Ruthenium Isotopic Abundances.  

National Technical Information Service (NTIS)

Ruthenium isotopic compositions were measured on various terrestrial samples. One measurement was made on meteoritic material and assumed to be representative of primordial ruthenium. These measurements were made possible after a careful investigation of ...

C. Devillers T. Lecomte M. Lucas R. Hagemann

1976-01-01

439

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.

440

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2011 CFR

...security number(s), birth date, place of birth, citizenship, gender, all languages (spoken or written); (2) Currently...investigation, a tribe or its agents shall keep confidential the identity of each person interviewed in the course of the...

2013-04-01

441

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.

442

An Investigation of Cerebrospinal Fluid Shunt Valves.  

National Technical Information Service (NTIS)

The report represents the results of phase II of an investigation involving the development and evaluation of tests which can be used to demonstrate that a given Cerebrospinal Fluid (CSF) Shunt Valve will perform its intended regulating function. Included...

H. D. Keith X. Avula C. Schelich C. Watts

1981-01-01

443

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2010 CFR

...hearing before the investigating officer (IO); (2) To inspect all evidence gathered...this section); (6) To challenge the IO for cause (such challenges must be made... (d) If a hearing is requested, the IO will conduct the hearing after...

2010-07-01

444

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2010 CFR

...hearing before the investigating officer (IO); (2) To inspect all evidence gathered...this section); (6) To challenge the IO for cause (such challenges must be made... (d) If a hearing is requested, the IO will conduct the hearing after...

2009-07-01

445

Contact Information for Questions about Clinical Investigations ...  

Center for Drug Evaluation (CDER)

... As a result of a natural disaster, clinical investigations and human subject protection programs at institutions in affected areas may be interrupted ... More results from www.fda.gov/drugs/emergencypreparedness

446

Theoretical Investigation of a Parallel Genetic Algorithm.  

National Technical Information Service (NTIS)

In the past few years the limitations of uniprocessor computing systems and the increasing availability of multiprocessors have led to investigations of parallel genetic algorithms. One algorithm in particular, called PGA, consists of a set of communicati...

C. C. Pettey M. R. Leuze

1989-01-01

447

Federal Bureau of Investigation Laboratory 2005 Report.  

National Technical Information Service (NTIS)

Investigations and intelligence gathering are the lifeblood of the FBI, and the FBI Laboratory supports those efforts. FBI Laboratory personnel routinely examine evidence from major cases, as well as other cases you may never read about in the newspaper. ...

2005-01-01

448

Investigation of Premature Distresses in Flexible Pavements.  

National Technical Information Service (NTIS)

The study was undertaken to investigate the growing concern regarding premature distresses in flexible pavements in North Carolina and to identify the causes and mechanisms associated with these untimely failures. This objective was approached through ext...

N. P. Khosla

1985-01-01

449

29 CFR 1982.104 - Investigation.  

Code of Federal Regulations, 2013 CFR

...AS SECTION 1413 OF THE IMPLEMENTING RECOMMENDATIONS OF THE 9/11 COMMISSION ACT OF 2007, AND THE FEDERAL RAILROAD SAFETY...BY SECTION 1521 OF THE IMPLEMENTING RECOMMENDATIONS OF THE 9/11 COMMISSION ACT OF 2007 Complaints, Investigations,...

2013-07-01

450

Investigation of RF Coupling with UWB Radar.  

National Technical Information Service (NTIS)

Direct experimental investigations of the coupling of microwave to military systems involves technically difficult instrumentation of the equipment. The problems associated with instrumenting the equipment can be avoided by exploiting the properties of ul...

A. J. E. Taylor R. A. Clement C. Hall D. M. Parkes

1995-01-01

451

FDA Investigates Acute Hepatitis Illnesses Potentially Linked ...  

Center for Food Safety and Applied Nutrition (CFSAN)

... The FDA along with the Centers for Disease Control and Prevention (CDC) and the Hawaii Department of Health (DOH) are investigating a growing ... More results from www.fda.gov/food/recalls,%20outbreaks%20&%20emergencies/outbreaks

452

Planned Axial Reorientation Investigation on Sloshsat.  

National Technical Information Service (NTIS)

This paper details the design and logic of an experimental investigation to study axial reorientation in low gravity. The Sloshsat free-flyer is described. The planned axial reorientation experiments and test matrixes are presented. Existing analytical to...

D. J. Chato

2000-01-01

453

Glaciological Investigations in Disco Bay Region 1983.  

National Technical Information Service (NTIS)

Glaciological investigations and reconnaissance in connection with hydropower have been carried out in the Disko Bugt area in 1983. The field programme is mainly concentrated on mass balance measurements on the Inland Ice at Pakitsup ilordlia north-east o...

H. Hoejmark Thomsen

1984-01-01

454

Investigating Factors Influencing Rates of Chemical Reactions  

NSDL National Science Digital Library

This activity is a lab investigation in which students observe the rate of generation of hydrogen gas from a reaction, and then modify the procedure to compare another variable affecting the rate of this reaction.

Derickson, Paula

455

29 CFR 24.104 - Investigation.  

Code of Federal Regulations, 2013 CFR

...applicable to investigations under the Safe Drinking Water Act; Federal Water Pollution...absence of the complainant's protected behavior or conduct. (5) If the respondent...adverse action in the absence of the behavior protected by the Act, the...

2013-07-01

456

McGee Ranch CPT investigation  

SciTech Connect

Applied Research Associated, Inc. (ARA), under contract to Argonne National Laboratory to perform work for Westinghouse Hanford Company (WHC), conducted Peizo Cone Penetration (P-CPT) Tests as part of an investigation of the fine-textured soils at the McGee Ranch Site. The purpose of the investigation was to characterize a potential borrow area for fine-textured soil materials that would be used to construct multi-layer closure covers on the Hanford Site. As part of the investigation, WHC conducted non auger-drill borings on the site during September 1992. ARA`s objective was to characterize the soils at the McGee Ranch site using the cone penetrometer and compare the findings with the lithologic characterization obtained from geologic boring logs. This report documents ARA`s site investigation efforts, test techniques, and analysis of the data for field work conducted April 14 and 15, 1993.

Cassem, B.R.

1993-06-15

457

46 CFR 555.5 - Investigations.  

Code of Federal Regulations, 2012 CFR

...procedures set forth in the notice. Submissions filed in response to a notice of investigation may include written data and statistics, views, and legal arguments. Factual information submitted shall be certified under oath. An original and...

2012-10-01

458

Laboratory Investigation That Identified the Cause of ...  

Center for Biologics Evaluation and Research (CBER)

Text VersionPage 1. Laboratory investigation that identified the ... October 3, 2012 Science Board Meeting ... Each video experiment is 1 hour long Spatial scale: ... More results from www.fda.gov/downloads/advisorycommittees/committeesmeetingmaterials

459

42 CFR 457.925 - Preliminary investigation.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) STATE CHILDREN'S HEALTH INSURANCE PROGRAMS (SCHIPs) ALLOTMENTS AND GRANTS...investigation. If the State agency receives a complaint of fraud or abuse from any source or identifies questionable practices, the...

2012-10-01

460

Leptospirosis in Ceylon - Epidemiological and Laboratory Investigation.  

National Technical Information Service (NTIS)

Investigations were undertaken to establish the serotypes prevalent and the vectors for them in Ceylon. The methods adopted were: human and animal tissues and body fluids were cultured direct; tissues from some animals were passaged through hamsters; surf...

K. Nityananda

1970-01-01

461

Investigation of a Leadership Development Program.  

National Technical Information Service (NTIS)

This study investigated whether individual leadership style and characteristics are affected by leadership training. A quantitative approach was taken, using Sashkin's Visionary Leadership Theory (VLT) to study the effects of a certificated military leade...

B. D. Lafferty

1998-01-01

462

Investigation of Fan Blade Shroud Mechanical Damping.  

National Technical Information Service (NTIS)

This program was conducted to investigate the effect of dry friction damping at the shroud interfaces on the structural dynamic characteristics of shrouded fan blades typical of current high performance jet engines. An analytical definition of the loads g...

D. A. Rimkunas H. M. Frye

1979-01-01

463

Information on Submitting an Investigational New Drug ...  

Center for Biologics Evaluation and Research (CBER)

... For all other investigational drugs, call 301-827-4570. ... All sections on form FDA 1571 must be addressed in the submission. ... More results from www.fda.gov/biologicsbloodvaccines/developmentapprovalprocess/investigationalnewdrugindordeviceexemptionideprocess

464

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

465

[Investigation of antioxidant activity of quinoline thioderivatives].  

PubMed

Antioxidant activity of new synthetic physiologically active substances (thioderivatives of quinoline) are investigated using the complex of primary estimation techniques in vitro and in vivo. It is shown that the compounds investigated display both antiradical and anti-oxidative activity, most strongly delineated for the compounds with methoxygroup in the 6th position of quinoline cycle. The suppositions concerning the mechanism of their antioxidant activity are made. PMID:16566134

Hromova, V P; Omel'ianchyk, L O; Brazhko, O A; Zavhorodni?, M P; Shapoval, H S; Tarasiuk, O P

466

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

467

Cyber Forensics Ontology for Cyber Criminal Investigation  

Microsoft Academic Search

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

Heum Park; Sunho Cho; Hyuk-Chul Kwon

2009-01-01

468

Investigating halo substructures with annual modulation signature  

Microsoft Academic Search

Galaxy hierarchical formation theories, numerical simulations, the discovery of the Sagittarius Dwarf Elliptical Galaxy (SagDEG)\\u000a in 1994 and more recent investigations suggest that the dark halo of the Milky Way can have a rich phenomenology containing\\u000a non-thermalized substructures. In the present preliminary study, we investigate the case of the SagDEG (the best known satellite\\u000a galaxy in the Milky Way crossing

R. Bernabei; P. Belli; F. Montecchia; F. Nozzoli; F. Cappella; A. Incicchitti; D. Prosperi; R. Cerulli; C. J. Dai; H. L. He; H. H. Kuang; J. M. Ma; X. D. Sheng; Z. P. Ye; M. Martinez; G. Giuffrida

2006-01-01

469

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.

470

Investigating Large-Scale Data Breach Cases  

Microsoft Academic Search

\\u000a \\u000a J. Andrew Valentine is currently a senior investigator and team lead for the Forensics and Incident Response Team within Verizon Business\\/Cybertrust\\u000a Inc. Mr. Valentine has led a number of high-profile investigations involving network breach and data compromise within the\\u000a United States as well as internationally many of which have led to successful indictment and prosecution. His work is highly

J. Andrew Valentine

471

Investigation of electrical properties of carbon nanotubes  

Microsoft Academic Search

This paper presents the investigation of electrical properties of carbon nanotubes (CNT). A sandwich configuration, quartz substrate\\/Cr\\/Al\\/CNT (partially immersed in SiN)\\/Cr\\/Al was investigated. The CNT are mainly oriented parallel with the electrodes. Current - voltage characteristics were taken at 20 K and room temperature and a current - temperature characteristic was taken at constant voltage (20 mV). The I -

Magdalena Lidia Ciurea; Ionel Stavarache; Ana-Maria Lepadatu; Vladimir Iancu; M. Dragoman; G. Konstantinidis; R. Buiculescu

2009-01-01

472

Investigating the Worth of Internet Advertising  

Microsoft Academic Search

This research investigates the advertising potential of the Internet services offered by television stations. It develops a conceptual framework for assessing the benefit of such on-line services. The framework at the core of the research, the On-line-Success-per-Programme-Typology, integrates programmes, success factors, and on-line services to provide a basis for detailed investigation. To develop this framework, the paper analyses the interdependencies

C LOEBBECKE; P POWELL; S TRILLINGH

1998-01-01

473

INVESTIGATION OF SULPHONAMIDES EFFECT ON ANAMMOX PROCESS  

Microsoft Academic Search

The influence of selected sulphonamides such as sulphacetamide (SCM) and p- toluenesulphonamide (p-TSA) on the Anammox process was investigated. The short-term (14-hour) and long-term (90-day) exposure of mixed Anammox culture to SCM and p-TSA was applied. The aim of long-term exposure study (conducted in continuous-flow bioreactors) was to investigate a long-term influence of sulphonamides on Anammox process and on adaptation

Anna Makuch

474

Experimental Investigations of Sandy Riverbed Morphology  

Microsoft Academic Search

\\u000a Contemporary advances in experimental methods and technologies are facilitating new and valuable insight into research questions\\u000a of long standing. Following a review of the history of investigations regarding sandy riverbed morphology, this chapter presents\\u000a a series of recent investigations into outstanding gaps in understanding of fluvial bedforms. Equipment advances are highlighted\\u000a in terms of use of a viscous-fluid flume, a

Stephen Coleman

475

RCRA Facility Investigation/Remedial Investigation Report for the Grace Road Site (631-22G)  

SciTech Connect

This report summarizes the activities and documents the results of a Resource Conservation and Recovery Act Facility Investigation/Remedial Investigation conducted at Grace Road Site on the Savannah River Site near Aiken, South Carolina.

Palmer, E.

1998-10-02

476

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

477

Scientific Investigations of Elementary School Children  

NASA Astrophysics Data System (ADS)

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

Valanides, Nicos; Papageorgiou, Maria; Angeli, Charoula

2013-04-01

478

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.

479

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

480

Laboratory Investigations of the Extreme Universe  

SciTech Connect

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

Chen, Pisin

2003-08-06

481

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.

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

482

(Hyperfine experimental investigation of zirconia ceramics)  

SciTech Connect

This research program has encompassed a broad investigation of microscopic structure and point defect properties in insulating materials and some recent exploratory work on semiconductors. The major experimental technique is perturbed angular correlation (PAC) spectroscopy. Our research provides information about the microscopic structure, nucleation, and equilibrium of structural phases in materials under investigation. We have studied phase equilibria in monoclinic, tetragonal, and cubic zirconia in the past and have recently begun more detailed investigation of high-temperature anomalies in monoclinic zirconia and tetragonal stabilized zirconia. We also have found a number of instances where the indium PAC probe has detected subtle phase changes, small precipitate formation, and other phase behavior that are difficult to detect by conventional diffraction methods. The PAC experimental technique is described briefly in section 2, and recent research is reviewed in section 3.

Not Available

1992-01-01

483

[Advances in the investigation of schizophrenia].  

PubMed

The recent advances in the investigation of schizophrenia were reviewed. Three major fields are considered relevant: 1. Genetic studies with the remarkable finding of the 6pter-p22 chromosome linkage study, which will lead to better understanding about inheritance of disease in the future; 2. The new x-ray techniques, including our own investigations showing smaller brain size in our patients, and 3. The prominent new antipsychotic drugs, as effective as the older drugs but with fewer side effects. PMID:9410794

Garnica-Portillo, R

484

Beam investigations at a multicusp ion source  

SciTech Connect

In cooperation with the Lawrence Berkeley Laboratory, a multicusp ion source has been investigated. The goal of these investigations is to generate a nearly pure atomic nitrogen (N{sup +}) ion beam. To achieve this, the discharge chamber is divided into two parts of different plasma parameters by means of a filter magnetic field. As beam diagnostics, a bending magnet and a faraday cup have been used. Measurements of the beam current density and the ion composition for a wide range of discharge conditions have been performed. By using a Langmuir probe, we have performed measurements of electron temperature and electron density.

Volk, K.; Klein, H. (Institut fuer Angewandte Physik der Johann Wolfgang Goethe-Universitaet, Robert-Mayer-Strasse 2-4, D-6000 Frankfurt am Main (Germany)); Leung, K.N. (Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States))

1992-04-01

485

Experimental investigation of thermal barriers. Final report  

SciTech Connect

During this contract period, we completed the following small scale laboratory experiments: (a) plasma confinement by picket fence cusp magnetic fields. (b) Electrostatic plugging of picket fence cusps. (c) Investigations of sheath phenomena including: characteristics of probe sheaths, secondary electrons in a plasma-wall sheath, and end wall characteristics in TMX. (d) Suppression of secondary electron emission by permanent magnet produced multidipole magnetic field. (e) Electron thermal insulation by double layers and multiple double layers. Many of these investigations have already had important consequences in the development of improvement for neutral beam sources.

Hershkowitz, N.

1984-04-01

486

Physics 620D: Electricity, Teacher Investigations  

NSDL National Science Digital Library

Stephen T. Thornton, a professor in the department of physics at the University of Virginia, has created this website to bring together a number of lesson plans for teachers in the field. Within this "Teacher Investigations" section of the site, visitors can look over three different classroom activities. The investigations include explorations into the world of light bulbs, the workings of circuits, and so on. Each activity includes a number of helpful diagrams, instructions, and questions for group discussion. Additionally, the site contains a list of recommended readings for physics teachers.

Thornton, Stephen T.

487

Physics 620D: Electricity, Teacher Investigations  

NSDL National Science Digital Library

Stephen T. Thornton, a professor in the department of physics at the University of Virginia, has created this website to bring together a number of lesson plans for teachers in the field. Within this âTeacher Investigationsâ section of the site, visitors can look over three different classroom activities. The investigations include explorations into the world of lightbulbs, the workings of circuits, and so on. Each activity includes a number of helpful diagrams, instructions, and questions for group discussion. Additionally, the site contains a list of recommended readings for physics teachers.

Thornton, Stephen T.

2007-04-18

488

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.

Elliott, P

1995-01-01

489

Offline loop investigation for handwriting analysis.  

PubMed

Resolution of different types of loops in handwritten script presents a difficult task and is an important step in many classic word recognition systems, writer modeling, and signature verification. When processing a handwritten script, a great deal of ambiguity occurs when strokes overlap, merge, or intersect. This paper presents a novel loop modeling and contour-based handwriting analysis that improves loop investigation. We show excellent results on various loop resolution scenarios, including axial loop understanding and collapsed loop recovery. We demonstrate our approach for loop investigation on several realistic data sets of static binary images and compare with the ground truth of the genuine online signal. PMID:19110488

Steinherz, Tal; Doermann, David; Rivlin, Ehud; Intrator, Nathan

2009-02-01

490

Investigating similarity in turbulent jets by LDA  

NASA Astrophysics Data System (ADS)

In this paper, a proof of the existence of the similarity in simple round and coaxial jets is given for nondimensional mean velocity and for turbulence. This proof is based on experimental investigation and analysis of mean velocity and turbulent profiles in simple round or coaxial free jets obtained from DISA 55x two-dimensional Laser Doppler Anemometry (LDA). It is concluded that: LDA can be used to investigate the similarity of isobaric compressible and incompressible jets. The similarity curve of the mean velocity and the root mean square of the turbulence are insensitive to thickness of nozzle lips and Re number.

Jiang, Z.; Lin, Q.

1986-03-01

491

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

492

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

493

Investigation of Crystal Growth from Solutions.  

National Technical Information Service (NTIS)

The quality was investigated of a crystal of Rochelle salt grown from a solution placed in the zero-gravity environment of Skylab 4. The crystal has the following unique features: (1) the typical cavity is a long tube extending along the c-axis, the avera...

I. Miyagawa

1974-01-01

494

Spill Sleuths: An Interdisciplinary Environmental Health Investigation  

ERIC Educational Resources Information Center

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

Rudensey, Lyle; Whidden, Jeff

2005-01-01

495

Investigation of leather industry competitiveness in Iran  

Microsoft Academic Search

Purpose The purpose of this paper is to investigate the competitiveness of the Iranian leather value chain (LVC) and compare that with those of nine other countries including China, Pakistan, Turkey, Republic of Korea, Indonesia, Spain, Italy, Brazil and the USA. The results presented in the paper seek to assist in assessing the competitive performance of the LVC in

Rasoul Shafaei; Hamid Shahriari; Morteza Moradi

2009-01-01

496

Investigations for a Mobile Environmental Education Laboratory.  

ERIC Educational Resources Information Center

|Envirpnmental investigations in this compilation were developed in conjunction with the establishment of a mobile environmental education laboratory, a demonstration project of the Kingsport (Tennessee) City School System. The 50 activities are divided into five categories: basic resources, environmental problems, living organisms, community

Childress, Ronald B.

497

A Serious Game for Traffic Accident Investigators  

ERIC Educational Resources Information Center

|In Dubai, traffic accidents kill one person every 37 hours and injure one person every 3 hours. Novice traffic accident investigators in the Dubai police force are expected to "learn by doing" in this intense environment. Currently, they use no alternative to the real world in order to practice. This paper argues for the use of an alternative

Binsubaih, Ahmed; Maddock, Steve; Romano, Daniela

2006-01-01

498

Investigation of the Therac-25 Accidents  

Microsoft Academic Search

Between June 1985 and January 1987, the Therac-25 medical electron accelerator was involved in six massive radiation overdoses. As a result, several people died and others were seriously injured. A detailed investigation of the factors involved in the software-related overdoses and attempts by users, manufacturers, and government agencies to deal with the accidents is presented. The authors demonstrate the complex

Nancy G. Leveson; Clark Savage Turner

1993-01-01

499

Geologic History Field Investigation - Minnehaha Falls  

NSDL National Science Digital Library

This activity is an inquiry-based field investigation of the geologic history of the Minnehaha Falls and St. Anthony Falls areas of Minneapolis. Students will be introduced to rocks and the stories rocks tell in a genuine geologic context, rather than as samples in the classroom.

Kevin Swanson and Justin Larson, Chippewa Middle School, North Oaks, MN

500

Confidential Informants in National Security Investigations  

Microsoft Academic Search

Although a body of law has developed around the use of confidential informants in criminal investigations, the role of informants in national security matters is less clearly defined. This Note first examines the limitations on the use of informants in the criminal context that are imposed by the Fourth Amendment, a detailed set of guidelines issued by the Attorney General,

Daniel V Ward

2006-01-01