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1

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

Code of Federal Regulations, 2010 CFR

... 2010-07-01 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...

2010-07-01

2

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

Code of Federal Regulations, 2010 CFR

... 2010-07-01 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...

2010-07-01

3

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

Code of Federal Regulations, 2010 CFR

...2010-07-01 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....

2010-07-01

4

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

Code of Federal Regulations, 2010 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...

2010-07-01

5

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

Code of Federal Regulations, 2010 CFR

... 2010-07-01 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...

2010-07-01

6

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

Code of Federal Regulations, 2010 CFR

... 2010-07-01 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...

2010-07-01

7

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

8

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

Code of Federal Regulations, 2010 CFR

...2010-07-01 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...

2010-07-01

9

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

E-print Network

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

Corona, Erick (Erick Gustavo)

2013-01-01

10

Model of the arc earth-fault for medium voltage networks  

NASA Astrophysics Data System (ADS)

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

Marciniak, Lubomir

2011-06-01

11

New variable speed drive with proven motor friendly performance for medium voltage motors  

Microsoft Academic Search

A medium voltage VSD is described, where existing standard motors can be connected. The sinusoidal quality of its output voltage is proven by AC machine manufacturer tests. No additional motor losses exist compared to operation direct on line. For quadratic loads like pumps and fans, self-ventilated motors can be operated at variable speed without cooling problems. This paper describes a

Juergen K. Steinke; Risto Vuolle; Herbert Prenner; J. Jarvinen

1999-01-01

12

Medium-Voltage Multilevel Converters—State of the Art, Challenges, and Requirements in Industrial Applications  

Microsoft Academic Search

This paper gives an overview of medium-voltage (MV) multilevel converters with a focus on achieving minimum harmonic distortion and high efficiency at low switching frequency operation. Increasing the power rating by minimizing switching frequency while still maintaining reasonable power quality is an important requirement and a persistent challenge for the industry. Existing solutions are discussed and analyzed based on their

Haitham Abu-Rub; Joachim Holtz; Jose Rodriguez; Ge Baoming

2010-01-01

13

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

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

14

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

Microsoft Academic Search

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

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

2003-01-01

15

Modelling, simulation and analysis of a Modular Multilevel Converter for medium voltage applications  

Microsoft Academic Search

The Modular Multilevel Converter (M2C) is an emerging multilevel converter for HVDC and FACTS as well as for future AC-fed traction vehicles or medium voltage drives (MVD). A suitable converter model of the Modular Multilevel Converter (M2C) is presented. A 7.2 kV, 7.5 MVA converter is taken as an example to analyze characteristic waveforms of the converter. The cause of

Steffen Rohner; Steffen Bernet; Marc Hiller; Rainer Sommer

2010-01-01

16

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

17

A comparative study on the shielding effect of tree, concrete building on direct lightning strokes to medium voltage distribution line  

Microsoft Academic Search

Lightning overvoltages are responsible for the majority of faults and outages that occur in Medium Voltage (MV) distribution networks. The overhead lines can be protected from the above phenomena with adequate installation of surge arresters and shield wires. Insulation enhancement can also play a significant role in minimizing outage rates of the lines, though it will not be so effective.

M. A. Omidiora; M. Lehtonen

2008-01-01

18

Application of Single Pole AutoReclosing in Medium Voltage Distribution Networks for Improving Integration of Distributed Generation  

Microsoft Academic Search

This paper is divided into three parts. The first part presents a bibliographical survey about the advances to date in the area of protection of medium voltage (MV) distribution networks with distributed generation (DG). The second part discusses the transient stability of distributed synchronous generators, and the application of single pole auto-reclosing (SPAR) scheme in MV distribution networks. In the

M. A. Figueroa; E. Orduna

2006-01-01

19

Medium voltage three-level converters for the grid connection of a multi-MW wind turbine  

Microsoft Academic Search

Three-level (3L) neutral point clamped (NPC), flying capacitor (FC), and H-bridge (HB) voltage source converters (VSCs) as a grid-side full-scale medium voltage (MV) converter are modeled, controlled, and simulated for the grid connection of a hypothetical 6MW wind turbine. Via the converter topological features and the simulation results demonstrating the converter performance, these three 3L-VSCs are discussed and compared in

Osman S. Senturk; Lars Helle; Stig Munk-Nielsen; Pedro Rodriguez; Remus Teodorescu

2009-01-01

20

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

21

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

NASA Astrophysics Data System (ADS)

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

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

22

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

23

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

24

Medium Voltage–High 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

25

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

2011-12-01

26

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

NASA Astrophysics Data System (ADS)

This paper presents a medium-voltage motor drive with a three-phase modular multilevel PWM inverter and focuses on its control method and operating performance. This motor drive is particularly suitable for fans, blowers, pumps, and compressors, in which the load torque is proportional to the square of the rotating speed. Particular attention is paid to the dc-capacitor voltage fluctuation of each chopper-cell because it may affect the voltage rating of the power switching devices used. This paper describes the theoretical equations related to the amount of the voltage fluctuation. A downscaled model rated at 400V and 15kW is designed and built to confirm the validity and effectiveness of the nine-level (17-level in line-to-line) PWM inverter that is intended for use in medium-voltage motor drives to achieve energy savings.

Hagiwara, Makoto; Nishimura, Kazutoshi; Akagi, Hirofumi

27

An Effective Control Technique for Medium-Voltage High-Power Induction Motor Fed by Cascaded Neutral-Point-Clamped Inverter  

Microsoft Academic Search

For a cascaded neutral-point-clamped (NPC) inverter applied to the medium-voltage high-power induction-motor (IM) drives, an effective control technique is proposed in this paper. The novel sinusoidal pulsewidth modulation (PWM) pulse-rotation-control approach, for a wide range of output voltage, provides a simple way to implement vector control for IM when the cascaded NPC inverter is employed. The proposed method presents great

Baoming Ge; Fang Zheng Peng; Aníbal T. de Almeida; Haitham Abu-Rub

2010-01-01

28

Design and power management of an offshore medium voltage DC microgrid realized through high voltage power electronics technologies and control  

NASA Astrophysics Data System (ADS)

The growth in the electric power industry's portfolio of Direct Current (DC) based generation and loads have captured the attention of many leading research institutions. Opportunities for using DC based systems have been explored in electric ship design and have been a proven, reliable solution for transmitting bulk power onshore and offshore. To integrate many of the renewable resources into our existing AC grid, a number of power conversions through power electronics are required to condition the equipment for direct connection. Within the power conversion stages, there is always a requirement to convert to or from DC. The AC microgrid is a conceptual solution proposed for integrating various types of renewable generation resources. The fundamental microgrid requirements include the capability of operating in islanding mode and/or grid connected modes. The technical challenges associated with microgrids include (1) operation modes and transitions that comply with IEEE1547 without extensive custom engineering and (2) control architecture and communication. The Medium Voltage DC (MVDC) architecture, explored by the University of Pittsburgh, can be visualized as a special type of DC microgrid. This dissertation is multi-faceted, focused on many design aspects of an offshore DC microgrid. The focal points of the discussion are focused on optimized high power, high frequency magnetic material performance in electric machines, transformers, and DC/DC power converters---all components found within offshore, power system architectures. A new controller design based upon model reference control is proposed and shown to stabilize the electric motor drives (modeled as constant power loads), which serve as the largest power consuming entities in the microgrid. The design and simulation of a state-of-the-art multilevel converter for High Voltage DC (HVDC) is discussed and a component sensitivity analysis on fault current peaks is explored. A power management routine is proposed and evaluated as the DC microgrid is disturbed through various mode transitions. Finally, two communication protocols are described for the microgrid---one to minimize communication overhead inside the microgrid and another to provide robust and scalable intra-grid communication. The work presented is supported by Asea Brown Boveri (ABB) Corporate Research Center within the Active Grid Infrastructure program, the Advanced Research Project Agency - Energy (ARPA-E) through the Solar ADEPT program, and Mitsubishi Electric Corporation (MELCO).

Grainger, Brandon Michael

29

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

Microsoft Academic Search

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

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

2010-01-01

30

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

31

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

Microsoft Academic Search

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

Vahid Abbasi; Ahmad Gholami; Kaveh Niayesh

2012-01-01

32

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

SciTech Connect

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

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

2014-11-01

33

A vector control technique for medium voltage multilevel inverters  

Microsoft Academic Search

This paper presents a switching strategy for multilevel cascade inverters, based on the space vector theory. The proposed switching strategy generates a voltage vector with very low harmonic distortion and reduced switching frequency. This new control method is an attractive alternative to the classic multilevel PWM techniques considering the following aspects: (i) voltage and current THD, (ii) range of linear

J. Rodriguez; P. Correa; L. Moran

2001-01-01

34

A vector control technique for medium-voltage multilevel inverters  

Microsoft Academic Search

This paper presents a switching strategy for multilevel cascade inverters, based on the space-vector theory. The proposed switching strategy generates a voltage vector with very low harmonic distortion and reduced switching frequency. This new control method is an attractive alternative to the classic multilevel pulsewidth modulation techniques considering the following aspects: (1) voltage and current total harmonic distortion; (2) range

José Rodríguez; Luis Morán; Pablo Correa; Cesar Silva

2002-01-01

35

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

NASA Technical Reports Server (NTRS)

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

Vorpenian, Vatche

2008-01-01

36

Height Optimization for a Medium-Voltage Planar Package  

Microsoft Academic Search

Due to the thin structure employed in planar packaging, the high electric field intensity may occur inside the power module, leading to degradation of the dielectric performance. To resolve this issue, the Metal-Posts-Interconnected Parallel Plate Structure (MPIPPS) is used to reduce the high field concentration in the power module. However, the high bonding joint in MPIPPS will cause high thermo-mechanical

Xiao Cao; Tao Wang; Khai D. T. Ngo; Guo-Quan Lu

2009-01-01

37

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

E-print Network

for the location of the discharge sites [2]. In the present study, ultrasonic acoustic emission was directly. FUNDAMENTALS Focussing on corona discharge and surface discharge, i.e. electrical gas discharges occurring

Boyer, Edmond

38

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

39

Considerations for ground fault protection in medium-voltage industrial and cogeneration systems  

Microsoft Academic Search

Several aspects are presented of system grounding and the limitations of some systems with respect to applying ground fault protection to industrial distribution networks. Relays cannot prevent damage by themselves, nor can they be applied to compensate for design deficiencies. It is pointed out that there is no one absolute solution to system grounding and\\/or protection, but judgment can be

D. J. Love; N. Hashemi

1988-01-01

40

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

E-print Network

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

Chryssostomidis, Chryssostomos

2011-01-01

41

Parametric Study of Joint Height for a Medium-Voltage Planar Package  

Microsoft Academic Search

Due to the thin structure used in planar packaging, the electric field intensity within the encapsulation is high, leading to degradation of the dielectric performance. To resolve this issue, a metal posts interconnected parallel plate structure (MPIPPS) is used to reduce the high electric field concentration in the power module. However, the high bonding joint in MPIPPS causes large thermo-mechanical

Xiao Cao; Tao Wang; Khai D. T. Ngo; Guo-Quan Lu

2010-01-01

42

Modeling of medium voltage power electronics converters utilizing advanced simulation tools  

Microsoft Academic Search

This paper addresses the steady-state and dynamic modeling of a three-level, neutral-point-clamped (NPC) voltage source converter (VSC) with active front-end (AFE) in a commercial 2.5 MW variable speed motor drive (VSD). The AFE of the modeled VSD adopts the selective harmonic elimination SHE-PWM technique with the optimization of inverter power capacity and power source quality for a wide- range VSD

Oleg Vodyakho; Tim Chiocchio; Michael Steurer; Chris Edrington; Mike Sloderbeck

2011-01-01

43

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

44

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

45

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

Code of Federal Regulations, 2011 CFR

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

2011-07-01

46

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

Code of Federal Regulations, 2014 CFR

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

2014-07-01

47

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

Code of Federal Regulations, 2012 CFR

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

2012-07-01

48

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

Code of Federal Regulations, 2013 CFR

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

2013-07-01

49

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

Microsoft Academic Search

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

Haifeng Fan

2011-01-01

50

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

SciTech Connect

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

None

2010-09-01

51

Statistics Investigations  

NSDL National Science Digital Library

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

2013-01-01

52

Investigator Resources  

Cancer.gov

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

53

Investigator Resources  

Cancer.gov

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

54

Investigator Resources  

Cancer.gov

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

55

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

E-print Network

in a porous energy absorber during an internal arc fault in a medium voltage apparatus. A one dimensional gas understanding of the physical phenomena involved, as for example the cooling and the shock wave absorption and the people are generally very delicate to realize and very expensive, because the energy to be absorbed

Sart, Remi

56

Investigator Resources  

Cancer.gov

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

57

Fire investigation  

NASA Astrophysics Data System (ADS)

There was considerable progress made on several fronts of fire investigation in the United States in recent years. Progress was made in increasing the quantity of fire investigation and reporting, through efforts to develop the National Fire Incident Reporting System. Improving overall quality of fire investigation is the objective of efforts such as the Fire Investigation Handbook, which was developed and published by the National Bureau of Standards, and the upgrading and expanding of the ""dictionary'' of fire investigation and reporting, the NFPA 901, Uniform Coding for Fire Protection, system. The science of fire investigation as furthered also by new approaches to post fire interviews being developed at the University of Washington, and by in-depth research into factors involved in several large loss fires, including the MGM Grand Hotel in Las Vegas. Finally, the use of special study fire investigations - in-depth investigations concentrating on specific fire problems - is producing new glimpses into the nature of the national fire problem. A brief description of the status of efforts in each of these areas is discussed.

Gomberg, A.

58

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.

Garrett R Love

59

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 Phase II clinical trials networks, as well as through the NCI Clinical Trials Network (NCTN).

60

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

61

Investigation Organizer  

NASA Technical Reports Server (NTRS)

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

Panontin, Tina; Carvalho, Robert; Keller, Richard

2004-01-01

62

Interactive Investigator  

NSDL National Science Digital Library

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

63

Investigating DNA  

NSDL National Science Digital Library

Investigating DNA is a set of activities selected for students in a high school biology course, as well as a model for organizing and managing instruction in a high school science class. Students learn basic techniques of modern biology, the story of the discovery of DNA, and the structure and properties of DNA. They also learn to work as a team, manage their time in the classroom and lab, follow written and demonstrated procedures, and evaluate their own work. Investigating DNA includes a rationale for this approach, strategies for managing the activities, a description of each activity and a listing of resources available.

Leslie Ann Pierce (Thomas A. Edison High School REV)

1994-07-30

64

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.

Kyle Gray

65

Investigation begun.  

PubMed

Texas prosecutors are investigating the possibility of criminal wrongdoing by the Panhandle AIDS Support Organization. A financial management audit was requested by the organization's board of directors. Nancy Ray, executive director of the Panhandle AIDS Support Organization until February 1998, is the presumed target of the inquiry. PMID:11366961

1999-05-14

66

Tetrahedra investigation  

NSDL National Science Digital Library

In this interactive lesson, students use spatial sense and abstract reasoning to investigate colorings of the faces of a tetrahedron. The lesson includes an introductory activity, Flash applets to help students eliminate rotational duplications, and an animated demonstration of the final result. Downloadable teachers notes (doc) and a student worksheet (pdf) are provided.

2011-01-01

67

Site Investigation  

NSDL National Science Digital Library

Authors Clayton, Matthews and Simon offer their work, titled "Site Investigation," for free download. The text is broken up into chapters, and can be accessed together or separately. Additionally, users can also access a free copy of "Critical State Soil Mechanics" by authors Schofield and Wroth.

Clayton, C.R.I.

68

Investigational Techniques  

Microsoft Academic Search

There are various clinical neurophysiological techniques which have been applied to the investigation of the pelvic floor and neurogenic bladder. Sphincter electromyography (EMG) has proved to be particularly valuable in identifying patients with parkinsonism who have multiple system atrophy. EMG of the striated muscle of the urethral sphincter is essential in recognizing the abnormal spontaneous activity which causes urinary retention

Clare J. Fowler

1998-01-01

69

Investigating Starch  

NSDL National Science Digital Library

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

2014-01-28

70

Soil Investigations  

NSDL National Science Digital Library

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

Integrated Teaching and Learning Program,

71

Sunblock Investigation  

NSDL National Science Digital Library

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

The Jim Henson Company

2008-01-01

72

Rollercoaster Investigations  

NSDL National Science Digital Library

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

Holly Mentillo

2012-09-01

73

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.

Nancy P. Moreno

2009-01-01

74

Investigator Resources  

Cancer.gov

The Cancer Trials Support Unit (CTSU) is a service of the National Cancer Institute (NCI) designed to facilitate access to NCI-funded clinical trials for qualified clinical sites and to support the management and conduct of those clinical trials. CTSU membership provides access to a wide range of information and support services for qualified investigators and research staff. The CTSU Registration Page provides additional details regarding member access.

75

Investigating Invasives  

NSDL National Science Digital Library

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

Mary Lightbody

2008-11-01

76

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.

77

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.

78

2. INVESTIGATOR(S) 3. INTRODUCTION  

E-print Network

27, 2011 2. INVESTIGATOR(S) 2.1 Investigator(s) Name and Title Dr. Wolfgang Ludwig Centre de Laboratoire des Mécanismes de Tranfert en Géologie CNRS / University Paul Sabatier, Toulouse, France 2.2 Title

79

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

80

2. INVESTIGATOR(S) 3. INTRODUCTION  

E-print Network

26, 2011 2. INVESTIGATOR(S) 2.1 Investigator(s) Name and Title Dr. Wolfgang Ludwig Centre de Laboratoire des Mécanismes de Tranfert en Géologie CNRS / University Paul Sabatier, Toulouse, France 2.2 Title.3 Contacts (For Data Production Information) Contact 1 Contact 2 2.3.1 Name Dr. Wolfgang Ludwig Dr. Philippe

81

Death Investigation Certificate  

E-print Network

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

Saldin, Dilano

82

Medical device incident investigation.  

PubMed

FDA Medical Device Reporting regulations require investigation and reporting of certain device-related incidents. Medical device incident investigation is also a key component of risk management for healthcare delivery organizations. However, the fundamental objective of incident investigation is to identify the root cause of an incident and mitigate the risk (probability x severity) of recurrence. PMID:17487098

Baretich, Matthew F

2007-01-01

83

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

84

Investigating the Ocean  

NSDL National Science Digital Library

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

85

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

86

Investigating Global Connections  

NSDL National Science Digital Library

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

2012-07-24

87

Ancillary investigations in uveitis  

PubMed Central

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

Gupta, Vishali; Gupta, Amod

2013-01-01

88

Vamistor resistor investigation  

NASA Technical Reports Server (NTRS)

Results are presented of the failure investigation conducted on resistors produced by the Vamistor Divison, Wagner Electric Corporation. This failure investigation included; failure analyses, chemical and metallurgical analyses, failure mechanism studies, seal leak analyses, and nondestructive stress tests. The data, information, conclusions, and recommendation can be helpful in assessing current usage of these resistors.

1973-01-01

89

Investigations in Martian Sedimentology  

NASA Technical Reports Server (NTRS)

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

Moore, Jeffrey M.

1998-01-01

90

Assessment of Biology Investigations.  

ERIC Educational Resources Information Center

Makes a case for the assessment of investigations against the Concept of Evidence in written tests as a potentially more reliable and valid way of assessing the ideas used in all types of biology investigations, thus reducing the distorting effect of assessment on the curriculum. (Author/SOE)

Roberts, Ros; Gott, Richard

2003-01-01

91

Floodplain Development Investigation  

NSDL National Science Digital Library

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

Coulter, Bob

92

Floodplain Development Investigation  

NSDL National Science Digital Library

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

Bob Coulter

2007-01-01

93

Microgravity silicon zoning investigation  

NASA Technical Reports Server (NTRS)

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

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

1985-01-01

94

Investigational Drug Steering Committee  

Cancer.gov

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

95

Investigating Neighborhood Wetlands  

NSDL National Science Digital Library

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

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

96

Dendritic Growth Investigators  

NASA Technical Reports Server (NTRS)

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

2000-01-01

97

Crime Scene Investigation  

NSDL National Science Digital Library

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

Idaho PTV

2011-08-09

98

Access to Investigational Drugs  

MedlinePLUS

... investigational drugs through mechanisms such as expanded access protocols and special exception programs, but specific criteria must ... drugs include mechanisms such as an expanded access protocol or a special or compassionate exception. The sponsor ...

99

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

100

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.

101

INVESTIGATION HIGHLIGHTED ARTICLE  

E-print Network

(Clarke et al. 1968; Mallet 1989; Joron et al. 2006), snails (Murray and Clarke 1976), and fish (Winge and predation. Here we use genome-wide linkage mapping in threespine stickleback fish to investigate the genetic

Shapiro, Mike

102

Skylab EREP Investigations Summary  

NASA Technical Reports Server (NTRS)

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

Pierson, W. J. (editor)

1978-01-01

103

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...

104

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

105

Resources for Investigators  

Cancer.gov

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

106

Journal of Investigative Dermatology  

NSDL National Science Digital Library

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

107

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

108

Systems special investigation group  

NASA Technical Reports Server (NTRS)

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

1991-01-01

109

Subsonic Scarf Inlets Investigated  

NASA Technical Reports Server (NTRS)

A computational investigation is underway at the NASA Glenn Research Center to determine the aerodynamic performance of subsonic scarf inlets. These inlets are characterized as being longer over the lower portion of the inlet, as shown in the preceding figure. One of the key variables being investigated in the research is the circumferential extent of the longer portion of the inlet. It shows two specific geometries that are being examined: one in which the length of the inlet transitions from long-to-short over the full 180 deg. from bottom to top, and a second in which the length transitions over 67.5 deg.

Abbott, John M.

2005-01-01

110

Investigating the Line  

NSDL National Science Digital Library

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

James H. Kessler

2007-01-01

111

Investigation of quantum roulette  

E-print Network

In this paper, by using permutation matrices as a representation of symmetric group $S_N$ and Foureir matrix, we investigate quantum roulette with arbitrary $N$ state. This strategy, which we introduce, is general method that allows to solve quantum game for arbitrary $N$ state. Finally, for example we employ this strategy for quantum roulette with N=3.

Salimi, S

2008-01-01

112

Acid Rain Investigations.  

ERIC Educational Resources Information Center

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

Hugo, John C.

1992-01-01

113

Investigating the Insides  

NSDL National Science Digital Library

In this activity, learners work in teams to investigate the composition of unseen materials using a variety of tools. This open-ended engagement activity mimics how scientists discover clues about the interiors of planets with cameras and other instruments onboard spacecraft.

2014-07-11

114

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

115

The Polar Insulation Investigation  

ERIC Educational Resources Information Center

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

Urban-Rich, Juanita

2006-01-01

116

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

117

Galileo radio science investigations  

Microsoft Academic Search

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

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

1992-01-01

118

Investigating Nitrogen Dioxide  

NSDL National Science Digital Library

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

119

7, 203245, 2007 Investigative  

E-print Network

ACPD 7, 203­245, 2007 Investigative modeling of new pathways for SAO formation B. K. Pun and C for secondary organic aerosol formation B. K. Pun and C. Seigneur Atmospheric and Environmental Research, Inc December 2006 ­ Published: 10 January 2007 Correspondence to: B. K. Pun (pun@aer.com) 203 #12;ACPD 7, 203

Paris-Sud XI, Université de

120

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

121

Midcareer and Established Investigators  

Cancer.gov

A listing of links for information on NCI-supported fellowships, research career development awards and training/education research programs for midcareer and established investigators who are pursuing careers in: basic science; clinical science; and cancer prevention; cancer control; or the behavioral or population sciences.

122

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

123

Investigating the Human Experience  

ERIC Educational Resources Information Center

A project entitled "Investigating the Human Experience," which was funded by the National Endowment for the Humanities, enables the College of DuPage to conduct a series of free films in various off-campus facilities. Documentaries and recent TV specials are shown, followed by a group discussion moderated by an instructor from the college.…

Ducote, Richard L.; Peterson, Robert E.

1975-01-01

124

Investigating Your Environment.  

ERIC Educational Resources Information Center

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

Forest Service (USDA), Washington, DC.

125

Physics in Carnacki's investigations  

Microsoft Academic Search

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

Amelia Sparavigna

2007-01-01

126

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.

Lynne Shenk

127

Investigations into Character Enhancement.  

ERIC Educational Resources Information Center

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

Hartoonian, H. Michael

2001-01-01

128

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

129

Clinical Investigations Branch (CIB)  

Cancer.gov

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

130

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.

131

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

132

Federal Bureau of Investigation  

MedlinePLUS

... Crime You can report violations of U.S. federal law or submit Information in a criminal or terrorism investigation as follows: Submit a tip electronically Contact your local FBI office Contact your nearest overseas office Report online crime or e-mail ... Resources for: Law Enforcement | Intel Partners | Researchers/Students | Communities | Parents | Victims | ...

133

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.

Kathleen A. FitzPatrick

2004-11-01

134

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

135

UC San Diego Investigates  

E-print Network

UC San Diego Invisible NO MORe: Scripps Investigates Ocean Acidification With shocking spee vulnerable to ocean acidification are vital to ocean food webs. Pteropods are small marine snails's leading ocean acidification researchers. They are bridging fields such as marine biology, physics

Schurgers, Curt

136

Investigating Ramps and Sliders.  

ERIC Educational Resources Information Center

Offers a series of hands-on activities for introducing students to concepts of energy transfer and conversion. Describes how simple devices as marbles, ramps, and sliders can be used to gauge the transfer of energy and assist in the development of investigative skills. (ML)

Malone, Mark R.

1986-01-01

137

INVESTIGATION HIGHLIGHTED ARTICLE  

E-print Network

crossovers. We used unique features of Drosophila melanogaster to investigate origins and properties years ago by T. H. Morgan and his students in classic studies of Drosophila genetics (Morgan 1911 Helicase Is Absent in Drosophila Matthew C. LaFave,*,1,2 Sabrina L. Andersen,*,1,3 Eric P. Stoffregen

Sekelsky, Jeff

138

INVESTIGATION HIGHLIGHTED ARTICLE  

E-print Network

INVESTIGATION HIGHLIGHTED ARTICLE Effect of Genetic Variation in a Drosophila Model of Diabetes to a molecular mechanism demonstrate the many advantages Drosophila holds in determining the genetic models of human disease in experimental organisms. Drosophila can provide genetic in- sights relevant

Gruber, Jonathan

139

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.

140

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.

California Academy of Sciences

2008-01-01

141

FCS Technology Investigation Overview  

NASA Technical Reports Server (NTRS)

This working paper provides an overview of the Future Communication Study (FCS) technology investigation progress. It includes a description of the methodology applied to technology evaluation; evaluation criteria; and technology screening (down select) results. A comparison of screening results with other similar technology screening activities is provided. Additional information included in this working paper is a description of in-depth studies (including characterization of the L-band aeronautical channel; L-band deployment cost assessment; and performance assessments of candidate technologies in the applicable aeronautical channel) that have been conducted to support technology evaluations. The paper concludes with a description on-going activities leading to conclusion of the technology investigation and the development of technology recommendations.

Budinger, James; Gilbert, Tricia

2007-01-01

142

DTP - NCI Investigational Drugs  

Cancer.gov

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

143

INVESTIGATION OF QUANTUM ROULETTE  

Microsoft Academic Search

In this paper, by using permutation matrices as a representation of symmetric\\u000agroup $S_N$ and Fourier matrix, we investigate quantum roulette with an\\u000aarbitrary $N$-state. This strategy, which we introduce, is general method that\\u000aallows us to solve quantum game for an arbitrary $N$-state. We consider the\\u000ainteraction between the system and its environment and study the effect of the

S. SALIMI; M. M. SOLTANZADEH

2009-01-01

144

Genesis Failure Investigation Report  

NASA Technical Reports Server (NTRS)

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

Klein, John

2004-01-01

145

Tree Growth Investigation  

NSDL National Science Digital Library

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

Twin Cities Public Television, Inc.

2007-01-01

146

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

147

Investigating Magnetic Force Fields  

NSDL National Science Digital Library

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

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

2012-03-18

148

Investigating With Charles Darwin  

NSDL National Science Digital Library

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

John Eichinger

2008-10-01

149

Rocket Motor Microphone Investigation  

NASA Technical Reports Server (NTRS)

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

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

2010-01-01

150

Volcanic Material Catapult Investigation  

NSDL National Science Digital Library

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

Twin Cities Public Television, Inc.

2007-01-01

151

Colored Shadows Investigation  

NSDL National Science Digital Library

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

Twin Cities Public Television, Inc.

2006-01-01

152

STS investigators' guide  

NASA Technical Reports Server (NTRS)

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

1989-01-01

153

Cooperative Soft Pork Investigations.  

E-print Network

. L. FRAZIER, Stenographer W. L. HEARN, Stenographer MARGARET SHELDON, Stenographer 3PERATIVE SOFT PORK INVESTIGATIONS. PART 1.-A ~\\{ETHOD. FOR T+IE TESTING OF PORK ON THE BASIS OF FIRNNESS. P. V. Ewing, Roy 31. Green, and L. B. Burk. 2.A... TENTATIVE ST-4Nn-4RD FOR THE TESTING OF PORK ON THE .BASIS OF FIRMNESS'. P. V. Ewing, L. B. Burk, and Roy M. Green. PART 3.-A~!r~nlon~I?nl GRADING OF PORK ON THE BASIS OF FIRMNESS. P. V. Ewing and L. B. Burk. 4.-METHOD OF ESTB..~CTING FAT SANPLES FROM...

Ewing, P. V. (Perry Van); Green, Roy M.; Burk, L. B. (Lloyd Byron); Wright, L. H.

1918-01-01

154

Investigation of quantum roulette  

E-print Network

In this paper, by using permutation matrices as a representation of symmetric group $S_N$ and Fourier matrix, we investigate quantum roulette with an arbitrary $N$-state. This strategy, which we introduce, is general method that allows us to solve quantum game for an arbitrary $N$-state. We consider the interaction between the system and its environment and study the effect of the depolarizing channel on this strategy. Finally, as an example we employ this strategy for quantum roulette with N=3.

S. Salimi; M. M. Soltanzadeh

2009-04-30

155

The Polar Insulation Investigation  

NSDL National Science Digital Library

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

Juanita Urban-Rich

2006-10-01

156

Radar Investigations of Asteroids  

NASA Technical Reports Server (NTRS)

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

Ostro, S. J.

1984-01-01

157

Airplane Wing Investigation  

NSDL National Science Digital Library

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

2012-05-09

158

Apollo light flash investigations  

NASA Technical Reports Server (NTRS)

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

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

1975-01-01

159

Exploring Earth: Investigations  

NSDL National Science Digital Library

These visualizations and internet-based activities were designed to accompany the high-school textbook "Earth Science" (McDougal Littell), but may be used as stand-alone activities. They use animations, interactive graphics, and imagery to help students gather information about a particular Earth science theme, issue, or concept. For each investigation, students examine a sequence of web pages on which they manipulate graphics or interpret image data. The pages contain background text and questions to help guide students' thinking. Topics include Earth as a system, the Earth's structure and motion, minerals, rocks, plate tectonics, volcanoes, earthquakes, and many others.

160

VAB Sway Investigation  

NASA Technical Reports Server (NTRS)

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

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

2013-01-01

161

Investigating the Invisible  

NSDL National Science Digital Library

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

162

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

163

Microwave radar oceanographic investigations  

NASA Technical Reports Server (NTRS)

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

Jackson, F. C.

1988-01-01

164

Dark Matter Investigations  

NASA Astrophysics Data System (ADS)

Experimental observations and theoretical considerations have shown that a large part of the Universe is made of Cold Dark Matter particles, relics from the Big Bang; this has currently motivated a large experimental effort to investigate them both by direct and indirect detection methods. In particular, the DAMA/NaI experiment (? 100 kg highly radiopure NaI(Tl)) had the unique feature to effectively investigate the presence of a Dark Matter particle component in the galactic halo in a model independent way by exploiting the so-called annual modulation signature. With a total exposure of more than 105 kg · day, collected over seven annual cycles deep underground at the Gran Sasso National Laboratory of the I.N.F.N., it has pointed out - at 6.3 ? C.L. - an effect which satisfies all the many peculiarities of the signature. Several (but still few with respect to the possibilities) corollary model dependent quests for the candidate particle have been carried out and some of the obtained results are summarized here.

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

2006-10-01

165

Dynamics Explorer guest investigator  

NASA Technical Reports Server (NTRS)

The research has focused on using the SAI auroral images as a high resolution auroral precipitation input to the USU global scale ionospheric model. From the global scale modeling viewpoint, these images offer unique spatial and temporal resolution since all prior studies have used empirical auroral models. These latter models are devoid of storm, substorm, or discrete oval features. The research focused on the problems in converting images to energy flux; using LAPU data to calibrate these energy fluxes; using the USU Time Dependent Ionospheric Model (TDIM) to look at the ionospheric consequences of this structure; and then using DE-2 in-situ observations to compare with the TDIM ionospheric parameters. In carrying out these studies, several additional investigations cropped up which were pursued to help meet the overall goals. The foremost difficulty in carrying out the TDIM modeling in conjunction with the high resolution DE auroral model was that of defining an appropriate ionospheric convection pattern. Under northward conditions this pattern is very complex. In order to study Theta aurora or in general northward IMF conditions, a new model was required. Hence, a study was completed to supply this new model to drive the TDIM as a function of the IMF. With the DE auroral model having adequate resolution to show structure on the 100's of km and all model electric fields being devoid of such structure, an investigation was pursued to find out the effects of structures in the electric field on the F-region.

Sojka, J. J.

1988-01-01

166

Dynamics Explorer guest investigator  

NASA Astrophysics Data System (ADS)

The research has focused on using the SAI auroral images as a high resolution auroral precipitation input to the USU global scale ionospheric model. From the global scale modeling viewpoint, these images offer unique spatial and temporal resolution since all prior studies have used empirical auroral models. These latter models are devoid of storm, substorm, or discrete oval features. The research focused on the problems in converting images to energy flux; using LAPU data to calibrate these energy fluxes; using the USU Time Dependent Ionospheric Model (TDIM) to look at the ionospheric consequences of this structure; and then using DE-2 in-situ observations to compare with the TDIM ionospheric parameters. In carrying out these studies, several additional investigations cropped up which were pursued to help meet the overall goals. The foremost difficulty in carrying out the TDIM modeling in conjunction with the high resolution DE auroral model was that of defining an appropriate ionospheric convection pattern. Under northward conditions this pattern is very complex. In order to study Theta aurora or in general northward IMF conditions, a new model was required. Hence, a study was completed to supply this new model to drive the TDIM as a function of the IMF. With the DE auroral model having adequate resolution to show structure on the 100's of km and all model electric fields being devoid of such structure, an investigation was pursued to find out the effects of structures in the electric field on the F-region.

Sojka, J. J.

1988-08-01

167

Bearing fatigue investigation 3  

NASA Technical Reports Server (NTRS)

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

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

1982-01-01

168

Investigating diffusion with technology  

NASA Astrophysics Data System (ADS)

The activities described here allow students to explore the concept of diffusion with the use of common equipment such as computers, webcams and analysis software. The procedure includes taking a series of digital pictures of a container of water with a webcam as a dye slowly diffuses. At known time points, measurements of the pixel densities (darkness) of the digital pictures are recorded and then plotted on a graph. The resulting graph of darkness versus time allows students to see the results of diffusion of the dye over time. Through modification of the basic lesson plan, students are able to investigate the influence of a variety of variables on diffusion. Furthermore, students are able to expand the boundaries of their thinking by formulating hypotheses and testing their hypotheses through experimentation. As a result, students acquire a relevant science experience through taking measurements, organizing data into tables, analysing data and drawing conclusions.

Miller, Jon S.; Windelborn, Augden F.

2013-07-01

169

Vitamin D Investigation  

NASA Technical Reports Server (NTRS)

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

1986-01-01

170

Investigating the Dark Halo  

NASA Astrophysics Data System (ADS)

The low background DAMA/NaI experiment (? 100 kg highly radiopure NaI(Tl)) at the Gran Sasso National Laboratory of the I.N.F.N. investigated the presence of Dark Matter particle in the galactic halo by exploiting the model independent annual modulation signature. This experiment has collected data over seven annual cycles for a total exposure of more than 105 kg × day and has pointed out at 6.3 ? C.L. a modulation effect satisfying all the many peculiarities of the signature. Several corollary model dependent quests for the candidate particle have also been carried out. At present the second generation DAMA/LIBRA set-up (? 250 kg highly radiopure NaI(Tl)) is in operation. A R&D towards possible 1 ton NaI(Tl) set-up is also in progress.

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

2009-01-01

171

Dynamic airfoil stall investigations  

NASA Technical Reports Server (NTRS)

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

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

1992-01-01

172

Investigations of lunar materials  

NASA Technical Reports Server (NTRS)

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

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

1972-01-01

173

Syncope: investigation and treatment.  

PubMed

Syncope is a common condition that can be both disabling and expensive to treat. Although investigative modalities are sometimes required, a diagnosis can often be made with a good history and physical exam. Recent reports have identified specific historic features that are more suggestive of cardiac syncope as compared with vasovagal syncope and seizures. Advances in ambulatory electrocardiography (in particular the implantable loop recorder) have proven invaluable in both difficult-to-diagnose syncope, and in advancing our knowledge of its mechanisms. When clear dysrhythmias are manifest, appropriate therapies are self-evident. However, recurrent vasovagal syncope continues to be a condition that can be difficult to treat. Fortunately, there are well-conducted trials of both pharmacologic therapies (b-blockers, alpha agonists, and selective serotonin reuptake inhibitors) and nonpharmacologic treatments (orthostatic physical training and dual-chamber pacemakers) that should provide more guidance in the near future. PMID:12169232

Raj, Satish R; Sheldon, Robert S

2002-09-01

174

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

175

Gear Crack Propagation Investigation  

NASA Technical Reports Server (NTRS)

Reduced weight is a major design goal in aircraft power transmissions. Some gear designs incorporate thin rims to help meet this goal. Thin rims, however, may lead to bending fatigue cracks. These cracks may propagate through a gear tooth or into the gear rim. A crack that propagates through a tooth would probably not be catastrophic, and ample warning of a failure could be possible. On the other hand, a crack that propagates through the rim would be catastrophic. Such cracks could lead to disengagement of a rotor or propeller from an engine, loss of an aircraft, and fatalities. To help create and validate tools for the gear designer, the NASA Lewis Research Center performed in-house analytical and experimental studies to investigate the effect of rim thickness on gear-tooth crack propagation. Our goal was to determine whether cracks grew through gear teeth (benign failure mode) or through gear rims (catastrophic failure mode) for various rim thicknesses. In addition, we investigated the effect of rim thickness on crack propagation life. A finite-element-based computer program simulated gear-tooth crack propagation. The analysis used principles of linear elastic fracture mechanics, and quarter-point, triangular elements were used at the crack tip to represent the stress singularity. The program had an automated crack propagation option in which cracks were grown numerically via an automated remeshing scheme. Crack-tip stress-intensity factors were estimated to determine crack-propagation direction. Also, various fatigue crack growth models were used to estimate crack-propagation life. Experiments were performed in Lewis' Spur Gear Fatigue Rig to validate predicted crack propagation results. Gears with various backup ratios were tested to validate crack-path predictions. Also, test gears were installed with special crack-propagation gages in the tooth fillet region to measure bending-fatigue crack growth. From both predictions and tests, gears with backup ratios (rim thickness divided by tooth height) of 3.3 and 1.0 produced tooth fractures, whereas a backup ratio of 0.3 produced rim fractures. For a backup ratio of 0.5, the experiments produced rim fractures and the predictions produced both rim and tooth fractures, depending on the initial geometry of the crack. Good correlation between predicted and measured crack growth was achieved when the fatigue crack-closure concept was introduced into the analysis. As the gear rim thickness decreased, the compressive cyclic stress in the gear-tooth fillet region increased. This retarded crack growth and increased the number of crack-propagation cycles to failure.

1995-01-01

176

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

177

HALOE Science Investigation  

NASA Technical Reports Server (NTRS)

This cooperative agreement has investigated a number of spectroscopic problems of interest to the Halogen Occultation Experiment (HALOE). The types of studies performed are in two parts, namely, those that involve the testing and characterization of correlation spectrometers and those that provide basic molecular spectroscopic information. In addition, some solar studies were performed with the calibration data returned by HALOE from orbit. In order to accomplish this a software package was written as part of this cooperative agreement. The HALOE spectroscopic instrument package was used in various tests of the HALOE flight instrument. These included the spectral response test, the early stages of the gas response test and various spectral response tests of the detectors and optical elements of the instruments. Considerable effort was also expended upon the proper laboratory setup for many of the prelaunch tests of the HALOE flight instrument, including the spectral response test and the gas response test. These tests provided the calibration and the assurance that the calibration was performed correctly.

Benner, D. Chris

1998-01-01

178

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

179

Sabatier Catalyst Poisoning Investigation  

NASA Technical Reports Server (NTRS)

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

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

2013-01-01

180

Gear crack propagation investigations  

NASA Technical Reports Server (NTRS)

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 linear elastic fracture mechanics, finite element modeling, and a unique re-meshing scheme to determine crack tip stress distributions, estimate stress intensity factors, and model crack propagation. Various fatigue crack growth models were used to estimate crack propagation life based on the calculated stress intensity factors. Experimental tests were performed in a gear fatigue rig to validate predicted crack propagation results. Test gears were installed with special crack propagation gages in the tooth fillet region to measure bending fatigue crack growth. Good correlation between predicted and measured crack growth was achieved when the fatigue crack closure concept was introduced into the analysis. As the gear rim thickness decreased, the compressive cyclic stress in the gear tooth fillet region increased. This retarded crack growth and increased the number of crack propagation cycles to failure.

Lewicki, David G.; Ballarini, Roberto

1996-01-01

181

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

182

Soldering In Space Investigation  

NASA Technical Reports Server (NTRS)

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

2004-01-01

183

Soldering In Space Investigation  

NASA Technical Reports Server (NTRS)

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

2004-01-01

184

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

SciTech Connect

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

None

2012-01-25

185

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

186

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

187

Artificial Selection Lab, Investigation #1  

NSDL National Science Digital Library

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

AP Biology Investigative Labs: An Inquiry-Based Approach

188

Investigating Your Environment. Student Handbook.  

ERIC Educational Resources Information Center

This handbook is designed to encourage students to investigate their environment. The techniques of investigative studies are explained and the means of implementing them are discussed. Environmental problems such as air and water quality, noise pollution, land use, and population studies are the suggested targets of the students' investigations.…

Biological Sciences Curriculum Study, Boulder, CO.

189

Investigating a computerized scaffolding software for student designed science investigations  

Microsoft Academic Search

Science standards call for students to develop skills in designing their own investigations. However, this is a complex task that is likely to overload the working memory capacities of students, therefore requiring scaffolding. This study investigated the effects of a computerized scaffold for student-designed experiments. Students (N = 102) used the computer program to individually design an experiment during the

Kelly M. Deters

2009-01-01

190

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

191

Accessing and Investigating Population Data  

NSDL National Science Digital Library

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

Grace M. Burton

2000-01-01

192

Accident/Mishap Investigation System  

NASA Technical Reports Server (NTRS)

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

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

2007-01-01

193

An Aircraft Accident Investigation: Revisited  

Microsoft Academic Search

Aircraft accidents are usually complex, and hence their investigation requires expertise from several fields. The challenge\\u000a for an investigating team is to analyze the bits and pieces of information gathered in the course of the investigation through\\u000a background information, interrogation, and material evidence and stitch them into a descriptive picture to arrive at the possible\\u000a cause(s) of the accident. During

S. K. Bhaumik

2008-01-01

194

37 CFR 11.22 - Investigations.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Investigations. 11.22 Section...TRADEMARK OFFICE Investigations and Disciplinary...Jurisdiction, Sanctions, Investigations, and Proceedings...discipline. An investigation may be...

2010-07-01

195

Principal Investigator Consent Form Authentication  

E-print Network

Principal Investigator Consent Form Authentication (November 21, 2005) A copy of this certificate that the specific consent form used in connection with each research project conforms to all requirements (BREB). > The principal investigator must ensure that the specific consent form submitted

Handy, Todd C.

196

Investigating Your Environment. Teachers' Handbook.  

ERIC Educational Resources Information Center

This teachers' handbook outlines the philosophy of this program, the methods of teaching it, and the information needed to perform the investigations. The purpose of this program is to encourage students to identify an environmental area to work in and to provide them with the tools to investigate it. The program fosters the idea of unsupervised…

Biological Sciences Curriculum Study, Boulder, CO.

197

The NCI Outstanding Investigator Award  

Cancer.gov

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

198

PRE-INVESTIGATION WATER ELECTROLYSIS  

E-print Network

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

199

Diving fatality investigations: recent changes.  

PubMed

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

Edmonds, Carl; Caruso, James

2014-06-01

200

Investigating Special Properties of Light  

NSDL National Science Digital Library

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

201

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...

202

PMB — Investigator Registration Expiration Date  

Cancer.gov

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

203

Investigation of the Zoom Lens.  

ERIC Educational Resources Information Center

Describes an open-ended investigation in which students have to look into a feature of lens performance that is not commonly found in textbook materials on optics. Presents explanations and sample results. (WRM)

Auty, Geoff

1999-01-01

204

Investigation of Zerodur material processing  

NASA Technical Reports Server (NTRS)

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

Johnson, R. Barry

1993-01-01

205

An Investigation on Quadratic Equations.  

ERIC Educational Resources Information Center

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

Hirst, Keith

1988-01-01

206

Investigational Drug Steering Committee Update  

Cancer.gov

Investigational Drug Steering Committee Update Angiogenesis Task Force Cardiovascular Toxicities Panel Michael Maitland, M.D., Ph.D. Angiogenesis Taskforce Cardiovascular Toxicities Panel „ Formation „ Process „ Results “we need to do something about

207

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)

208

78 FR 64026 - Investigative Hearing  

Federal Register 2010, 2011, 2012, 2013, 2014

...for the ongoing investigation into two Metro-North Railroad accidents that occurred...m. eastern daylight time, eastbound Metro-North Railroad passenger train 1548...track number 4 and was struck by westbound Metro-North Railroad passenger train...

2013-10-25

209

Plant improvement Investigations on transforming  

E-print Network

Plant improvement Investigations on transforming Triticum aestivum via the pollen tube pathway N the necessary conditions to transform wheat Triticum aestivum using the pollen tube pathway. Three methods. Triticum aestivum = wheat / transformation / pollen / nuclease Résumé — Recherches sur la

Paris-Sud XI, Université de

210

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.

211

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

212

Cognitive fallacies and criminal investigations.  

PubMed

The human mind is susceptible to inherent fallacies that often hamper fully rational action. Many such misconceptions have an evolutionary background and are thus difficult to avert. Deficits in the reliability of eye-witnesses are well known to legal professionals; however, less attention has been paid to such effects in crime investigators. In order to obtain an "inside view" on the role of cognitive misconceptions in criminalistic work, a list of fallacies from the literature was adapted to criminalistic settings. The statements on this list were rated by highly experienced crime scene investigators according to the assumed likelihood of these errors to appear and their severity of effect. Among others, selective perception, expectation and confirmation bias, anchoring/"pars per toto" errors and "onus probandi"-shifting the burden of proof from the investigator to the suspect-were frequently considered to negatively affect criminal investigations. As a consequence, the following measures are proposed: alerting investigating officers in their training to cognitive fallacies and promoting the exchange of experiences in peer circles of investigators on a regular basis. Furthermore, the improvement of the organizational error culture and the establishment of a failure analysis system in order to identify and alleviate error prone processes are suggested. PMID:25754002

Ditrich, Hans

2015-03-01

213

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

214

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

NASA Astrophysics Data System (ADS)

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

Salcedo Ulerio, Reynaldo Odalis

215

Ground vortex flow field investigation  

NASA Technical Reports Server (NTRS)

Flow field investigations were conducted at the NASA Ames-Dryden Flow Visualization Facility (water tunnel) to investigate the ground effect produced by the impingement of jets from aircraft nozzles on a ground board in a STOL operation. Effects on the overall flow field with both a stationary and a moving ground board were photographed and compared with similar data found in other references. Nozzle jet impingement angles, nozzle and inlet interaction, side-by-side nozzles, nozzles in tandem, and nozzles and inlets mounted on a flat plate model were investigated. Results show that the wall jet that generates the ground effect is unsteady and the boundary between the ground vortex flow field and the free-stream flow is unsteady. Additionally, the forward projection of the ground vortex flow field with a moving ground board is one-third less than that measured over a fixed ground board. Results also showed that inlets did not alter the ground vortex flow field.

Kuhn, Richard E.; Delfrate, John H.; Eshleman, James E.

1988-01-01

216

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

217

Modeling of a Spring\\/Damper System for Electrical Contacts using Dynamic Designer in Autodesk Mechanical Desktop  

Microsoft Academic Search

Extreme space limitations and the desire to reduce the bounce between contacts prompted an investigation of the use of Belleville washers and Sorbothane as part of a spring\\/damper system in a medium voltage high-speed shorting device. Experimental tests in conjunction with mechanism simulation have been used to optimize a spring and damping system for the minimization of bounce that occurs

Mary B. Groff

218

Thermal analysis for determination of current carrying capacity of PE and XLPE insulated power cables using finite element method  

Microsoft Academic Search

Transient heat transfer analysis of medium voltage, PE and XLPE insulated underground power cables are investigated by applying finite element modeling developed under a finite element software utilizing principle of virtual temperatures which is the quadratic functional form of the variational formulation of the transient heat transfer equation. Obtained results are compared with and verified by experimental heat transfer data

I. Kocar; A. Ertas

2004-01-01

219

Investigation of the Challenger Accident  

NASA Technical Reports Server (NTRS)

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

1986-01-01

220

Critical Viscosity of Xenon investigators  

NASA Technical Reports Server (NTRS)

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

2001-01-01

221

10 CFR 501.180 - Investigations.  

Code of Federal Regulations, 2010 CFR

...ADMINISTRATIVE PROCEDURES AND SANCTIONS Investigations, Violations, Sanctions and Judicial Actions § 501.180 Investigations. (a) General. ...conferences in conjunction with any investigation. (b) Any duly...

2010-01-01

222

Investigating Evolution with Living Plants.  

ERIC Educational Resources Information Center

Describes two investigative labs that use live plants to illustrate important biological principles, include quantitative analysis, and require very little equipment. Each lab is adaptable to a variety of class sizes, course contents, and student backgrounds. Topics include the evolution of flower size in Mimulus and pollination of Brassicas. (DDR)

Schlessman, Mark A.

1997-01-01

223

BIOINFORMATICS Investigating metabolite essentiality through  

E-print Network

validation and refinement in newly sequenced organisms. Combining an in silico genome-scale model of E. coli@mail.med.upenn.edu 1 INTRODUCTION Recent years have witnessed the sequencing and annotation of over one hundredBIOINFORMATICS Investigating metabolite essentiality through genome scale analysis of E. coli

Belta, Calin A.

224

INVESTIGATION Global Population Genetic Structure  

E-print Network

INVESTIGATION Global Population Genetic Structure of Caenorhabditis remanei Reveals Incipient-wide population genetic processes for their outcrossing relatives, which represent the reproductive state species from China, C. sp. 23. We find high genetic variation globally and within each local population

Cutter, Asher D.

225

Investigation of protein structure determination  

E-print Network

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

226

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.

227

Consortium investigation of breccia 67435  

NASA Technical Reports Server (NTRS)

The paper presents results of the initial phase of a consortium investigation of lunar rock 67435, a glass coated breccia which contains a unique spinel-troctolite clast. These results include oxygen isotopic data for the host breccia, bulk composition data for the host breccia, glass coating and a large aphanitic clast, and detailed petrographic descriptions of all lithologies encountered.

Warner, R. D.; Planner, H. N.; Keil, K.; Murali, A. V.; Ma, M.-S.; Schmitt, R. A.; Ehmann, W. D.; James, W. D., Jr.; Clayton, R. N.; Mayeda, T. K.

1976-01-01

228

The WIND magnetic field investigation  

Microsoft Academic Search

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

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

1995-01-01

229

Investigational Drug Steering Committee Roster  

Cancer.gov

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

230

Investigating Community and Social Capital  

NSDL National Science Digital Library

Investigating Community and Social Capital introduces students to quantitative social science research with a case study on social capital. Some of the concepts illustrated include replication, unit of analysis, level of measurement, analysis over time versus cross-sectional analysis, crosstabulation, creating an index, and correlation.

Lori M. Weber

231

CODE OF PRACTICE ON INVESTIGATIONS  

E-print Network

history 21 4.7. Medical records and other records relating to care, education etc 22 4.8 Research of criminal or other wrongful conduct 20 4.6 Biological and medical investigations and previous medical.1 Adverse events in any type of situation 27 12.2. Adverse events in clinical and other medical

Mottram, Nigel

232

Investigational Drug Steering Committee Roster  

Cancer.gov

Investigational Drug Steering Committee Roster Co-chairs Michael Carducci, M.D. Johns Hopkins University School of Medicine Baltimore, MD Amit Oza, M.D. Princess Margaret Hospital University of Toronto Toronto, Ontario Members Carol Aghajanian, M.D. Memorial

233

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

234

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

235

Visualizing Chemistry: Investigations for Teachers.  

ERIC Educational Resources Information Center

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

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

236

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.

237

Nuclear California: an investigative report  

Microsoft Academic Search

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

1982-01-01

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 the…

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

2011-01-01

239

Investigating Earthquakes through Regional Seismicity  

NSDL National Science Digital Library

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

John Marquis

240

Research News Clinical Investigation Center  

E-print Network

Research News Clinical Investigation Center Winter 2013 Advancing Veterinary and Human Medicine to one limb and has not metastasized. · Owners are willing to pursue amputation and chemotherapy previous surgery, chemotherapy, or radiation treatments for the osteosarcoma. The study covers the costs

Blanchette, Robert A.

241

The Galileo Plasma wave investigation  

Microsoft Academic Search

The purpose of the Galileo plasma wave investigation is to study plasma waves and radio emissions in the magnetosphere of Jupiter. The plasma wave instrument uses an electric dipole antenna to detect electric fields, and two search coil magnetic antennas to detect magnetic fields. The frequency range covered is 5 Hz to 5.6 MHz for electric fields and 5 Hz

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

1992-01-01

242

Investigation on laser safety informatics  

Microsoft Academic Search

With the aid of the detection on the multimedia messaging service (MMS) of the laser accidents, novel insecurity factors in laser safety informatics are investigated. By using continuously improved laser self-organization safety system, new concepts of laser safety are developed. Various kinds of accidents can be avoided when comprehensive protective measures are taken.

Chongwen Guan; Shizhan Lei; Yingjian Wang

2009-01-01

243

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...

244

Mobilising Ethnographers Investigating Technologised Learning  

ERIC Educational Resources Information Center

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

Landri, Paolo

2013-01-01

245

Defining Problems and Planning Investigations  

NSDL National Science Digital Library

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

Dustin Cannarella

2011-10-01

246

40 CFR 1620.4 - Investigations.  

Code of Federal Regulations, 2010 CFR

...HAZARD INVESTIGATION BOARD ADMINISTRATIVE CLAIMS ARISING UNDER THE FEDERAL TORT CLAIMS ACT § 1620.4 Investigations. CSB may investigate, or may request any other Federal agency to investigate, a claim filed under this...

2010-07-01

247

32 CFR 776.84 - Ethics investigation.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Ethics investigation. 776...MISCELLANEOUS RULES PROFESSIONAL CONDUCT OF ATTORNEYS...Procedures § 776.84 Ethics investigation. ...Counsel shall review all ethics investigations. If...investigation, that professional disciplinary...

2010-07-01

248

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2012 CFR

...RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) HHS will investigate complaints that are unresolved...2) As part of the initial investigation HHS will use informal fact finding...

2012-10-01

249

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2014 CFR

...RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) HHS will investigate complaints that are unresolved...2) As part of the initial investigation HHS will use informal fact finding...

2014-10-01

250

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2010 CFR

...RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) HHS will investigate complaints that are unresolved...2) As part of the initial investigation HHS will use informal fact finding...

2010-10-01

251

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2011 CFR

...RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) HHS will investigate complaints that are unresolved...2) As part of the initial investigation HHS will use informal fact finding...

2011-10-01

252

45 CFR 91.44 - Investigation.  

Code of Federal Regulations, 2013 CFR

...RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM HHS Investigation, Conciliation, and Enforcement... (a) Informal investigation. (1) HHS will investigate complaints that are unresolved...2) As part of the initial investigation HHS will use informal fact finding...

2013-10-01

253

10 CFR 218.40 - Investigations.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Investigations. 218.40 ...OIL ALLOCATION Investigations, Violations, Sanctions and Judicial Actions § 218.40 Investigations. (a) The...authority to conduct an investigation and to take...

2010-01-01

254

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

255

ATMOS Spacelab 1 science investigation  

NASA Technical Reports Server (NTRS)

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

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

1979-01-01

256

Eosinophilic oesophagitis: investigations and management.  

PubMed

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

Kumar, Mayur; Sweis, Rami; Wong, Terry

2014-05-01

257

Crop Science Investigation (CSI) Network  

NSDL National Science Digital Library

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

258

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

2001-01-01

259

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

260

Cytological investigations on Bulgarian phanerogams  

Microsoft Academic Search

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

MATTHIAS BALTISBERGER

2006-01-01

261

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. Biémont; P. Quinet; V. Van Renterghem

1998-01-01

262

Sea Turtle First Aid Investigation  

NSDL National Science Digital Library

This activity (located on page 4 of the PDF) is a full inquiry investigation into testing a repair material. Groups of learners perform “first aid” on a cut orange, which represents propeller damage on the back of a leatherback sea turtle. Learners use a variety of repair materials and predict how well various treatments will work, then observe treated, untreated, and uncut control oranges for 4 days. Relates to linked video, DragonflyTV GPS: Sea Turtles.

Twin Cities Public Television, Inc.

2007-01-01

263

Investigations on Barium Ferrite Magnets  

Microsoft Academic Search

Barium ferrite (BaO:6Fe2O3) has been investigated magnetically to test the predictions of fine particle theory in the region of grain sizes larger than the critical one for which no satisfactory theory exists as yet. Grain size and coercive force of polycrystalline magnets (nonoriented and crystal oriented) were closely related to sintering temperatures. A comparison of theoretical and observed temperature dependence

K. J. Sixtus; K. J. Kronenberg; R. K. Tenzer

1956-01-01

264

Investigating Natural Selection: Elementary School  

NSDL National Science Digital Library

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

2010-01-01

265

Shuttle Fuel Feedliner Cracking Investigation  

NASA Technical Reports Server (NTRS)

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

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

2002-01-01

266

Investigating leaking underground storage tanks  

E-print Network

tanks. Construction activity includes installation of tanks, modification of tanks, and removal of tanks (Texas Register, 1989). It is during the removal of many of these older tanks that releases to the environment are discovered by the presence... using a mud rotary rig (Figure 2). In all three borings, the presence of benzene, toluene, ethylbenzene, and xylene (BTEX's) was detected, prompting investigators to surmise that contamination was widespread across the entire site property. Because...

Upton, David Thompson

1989-01-01

267

Kinetic investigation of wood pyrolysis  

SciTech Connect

The objective of this investigation was to determine the kinetics of the primary reactions of wood pyrolysis. A new experimental method was developed which enabled us to measure the rate of gas, tar, and char production while taking into account the temperature variations during the wood heating up. The experimental method developed did not require any sophisticated instruments. It facilitated the collection of gas, tar and residue (unreacted wood and char) as well as accurate measurement of the temperature inside the wood sample. Expressions relating the kinetic parameters to the measured variables were derived. The pyrolysis kinetics was investigated in the range of 300 to 400/sup 0/C at atmospheric pressure and under nitrogen atmosphere. Reaction temperature and mass fractions of gas, tar, and residue were measured as a function of time. Assuming first-order reactions, the kinetic parameters were determined using differential method. The measured activation energies of wood pyrolysis to gas, tar, and char were 88.6, 112.7, and 106.5 kJ/mole, respectively. These kinetic data were then used to predict the yield of the various pyrolysis products. It was found that the best prediction was obtained when an integral-mean temperature obtained from the temperature-time curve was used as reaction temperature. The pyrolysis products were analyzed to investigate the influence of the pyrolysis conditions on the composition. The gas consisted mainly of carbon dioxide, carbon monoxide, oxygen, and C/sub 3//sup +/-compounds. The gas composition depended on reaction time as well as reactor temperature. The tar analysis indicated that the tar consisted of about seven compounds. Its major compound was believed to be levoglucosan. Elemental analysis for the char showed that the carbon content increased with increasing temperature.

Thurner, F.; Mann, U.; Beck, S. R.

1980-06-01

268

Electrokinetic investigation of surfactant adsorption.  

PubMed

Fuerstenau [D.W. Fuerstenau, in: M.L. Hair (Ed.), Dekker, New York, 1971, p. 143] has already discussed the role of hydrocarbon chain of surfactants, the effect of alkyl chain length, chain structure and the pH of the solution on the adsorption process of surfactants. Later Kosmulski [M. Kosmulski, Chemical Properties of Material Surfaces, Surfactant Science Series, vol. 102, Dekker, New York, Basel, 2001] included the effect of surfactant concentration, equilibration time, temperature and electrolyte in his approaches. Certainly, the character of the head groups of the surfactant and the properties of the adsorbent surface are the basis for the adsorption process. Different surfactants and adsorbents cause different adsorption mechanisms described firstly by Rosen [M.J. Rosen, Surfactants and Interfacial Phenomena, second ed., Wiley, New York, 1989]. These adsorption mechanisms and their influencing factors were studied by electrokinetic investigations. Here only changes of the charges at the surfaces could be detected. To control the results of electrokinetic investigations they were compared with results from ellipsometric measurements. In the case of surfactant adsorption the chain length was vitally important. It could be shown by the adsorption of alkyl trimethyl ammonium bromides onto polymer films spin coated at wafer surfaces. The influence of the chain length depending on surface properties of the polymer film was studied. Streaming potential measurements were applied for these investigations. The obtained results enabled us to calculate the molar cohesive free energy per mol of CH2-group in the alkaline chain of the surfactant if all other specific adsorption effects were neglected. PMID:17335842

Bellmann, C; Synytska, A; Caspari, A; Drechsler, A; Grundke, K

2007-05-15

269

Investigation of musicality in birdsong  

PubMed Central

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

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

2013-01-01

270

Expanded access to investigational drugs.  

PubMed

To the Editor: Darrow et al. (Jan. 15 issue)(1) highlight the challenges posed by expanded patient access to unapproved drugs, including an application process that may have been complicated by the time and complexity for physicians to complete the form currently used by the Food and Drug Administration (FDA) and multiple associated documents.(2) On February 4, 2015, the FDA published draft guidance on a streamlined process for individual-patient expanded-access submissions by physicians treating single patients with investigational drugs.(3) The process continues to protect patients while not undermining clinical-trial enrollment. Feedback from academia, physicians, patients, advocacy groups, and industry helped the . . . PMID:25839859

Lurie, Peter; Chan-Tack, Kirk M; Woodcock, Janet

2015-04-01

271

Expanded access to investigational drugs.  

PubMed

To the Editor: Darrow et al. (Jan. 15 issue)(1) highlight the challenges posed by expanded patient access to unapproved drugs, including an application process that may have been complicated by the time and complexity for physicians to complete the form currently used by the Food and Drug Administration (FDA) and multiple associated documents.(2) On February 4, 2015, the FDA published draft guidance on a streamlined process for individual-patient expanded-access submissions by physicians treating single patients with investigational drugs.(3) The process continues to protect patients while not undermining clinical-trial enrollment. Feedback from academia, physicians, patients, advocacy groups, and industry helped the . . . PMID:25839858

2015-04-01

272

Dynamics explorer interdisciplinary scientist investigations  

NASA Technical Reports Server (NTRS)

This document is a final report on research activities and accomplishments that occurred during the funding period of 10-1-90 through 1-30-94. The focus of our interdisciplinary investigation during the Dynamics Explorer Mission was on the complex coupling processes that tap the magnetic-storm energy, stored in the ring current particle reservoir, and transport this energy into the subauroral, midlatitude and even equatorial ionospheric regions. The transport of energy through the inner magnetosphere and into the underlying ionospheric regions is a critical element in our understanding of the impact of solar and magnetic disturbances on upper atmospheric and ionospheric regions equatorward of the auroral zone.

Kozyra, Janet U.; Nagy, A. F.

1994-01-01

273

Forensic Science: Hair Sample Investigation  

NSDL National Science Digital Library

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

Twin Cities Public Television, Inc.

2006-01-01

274

Overview of the Systems Special Investigation Group investigation  

NASA Technical Reports Server (NTRS)

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

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

1993-01-01

275

Rotational Investigation of Tropane Alkaloids  

NASA Astrophysics Data System (ADS)

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

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

2010-06-01

276

AP Biology Investigation #6: Cellular Respiration  

NSDL National Science Digital Library

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

AP Biology Investigative Labs: An Inquiry-Based Approach

277

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

278

Delaminations Investigated With Ultrasonic Spectroscopy  

NASA Technical Reports Server (NTRS)

A previous study suggested that the ultrasonic spectroscopy technique identified possible disbonds or delaminations in polymer matrix composite (PMC) rings sectioned from flywheel rotors (ref. 1). These results went unsubstantiated by other nondestructive evaluation (NDE) methods. To explain the results, PMC rings were further investigated with ultrasonic spectroscopy (ref. 2). The ultrasonic spectroscopy system utilizes a continuous-swept sine waveform as the input. After the swept sine wave traverses the material, the captured waveform is subjected to two fast Fourier transforms. The second fast Fourier transform along with equalization of the frequency spectrum, allows for evaluation of the fundamental resonant frequency. The full-thickness resonance, the resonance corresponding to the location of the intentional disbond, and the frequency spectrum were examined in an effort to characterize the sensitivity of the NDE method to various delamination conditions.

Cosgriff, Laura M.

2003-01-01

279

Marketing an investigational drug service.  

PubMed

The customer survey was a useful tool for marketing the IDS. It provided guidelines for making decisions about the best use of limited human and material resources. Analyzing the results of the survey provided new priorities and directions for the IDS. These results were then used in conjunction with pharmacy financial and operational data to focus on areas of greatest importance to the customers and the pharmacy. Physicians should not be reluctant to pursue compassionate use treatments because of the administrative programs responsibilities that accompany such programs. Every patient should have the opportunity to benefit from alternative therapies that are investigational. For the quality of patient care to be maintained or even enhanced when studies are conducted, nurses must be well trained. The marketing survey fulfilled its purpose of identifying service gaps and allowing us to improve our services. PMID:10128789

Johnson, V B; Crane, V; Hayman, J N

1993-04-01

280

Barchan dune asymmetry: Numerical investigation  

E-print Network

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

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

2013-01-01

281

Spectroscopic investigation of protein corona  

NASA Astrophysics Data System (ADS)

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

Choudhary, Poonam

282

29 CFR 24.104 - Investigation.  

Code of Federal Regulations, 2011 CFR

...STATUTES AND SECTION 211 OF THE ENERGY REORGANIZATION ACT OF 1974...investigations under the Safe Drinking Water Act; Federal Water...f) Investigation under the Energy Reorganization Act. In addition...to investigations under the Energy Reorganization Act....

2011-07-01

283

29 CFR 24.104 - Investigation.  

Code of Federal Regulations, 2010 CFR

...applicable to investigations under the Safe Drinking Water Act; Federal Water Pollution Control...activity. (e) Investigation under the Energy Reorganization Act. In addition to...applicable only to investigations under the Energy Reorganization Act. (1) A...

2010-07-01

284

29 CFR 1984.104 - Investigation.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Investigation. 1984.104 Section 1984.104 Labor Regulations Relating to Labor (Continued...Investigations, Findings and Preliminary Orders § 1984.104 Investigation. (a) Upon...

2014-07-01

285

29 CFR 1984.104 - Investigation.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Investigation. 1984.104 Section 1984.104 Labor Regulations Relating to Labor (Continued...Investigations, Findings and Preliminary Orders § 1984.104 Investigation. (a) Upon...

2013-07-01

286

16 CFR 1605.6 - Investigational hearings.  

Code of Federal Regulations, 2013 CFR

... Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION FLAMMABLE FABRICS ACT REGULATIONS INVESTIGATIONS, INSPECTIONS AND INQUIRIES PURSUANT TO THE FLAMMABLE FABRICS ACT Procedures for Investigations, Inspections and Inquiries §...

2013-01-01

287

16 CFR 1605.6 - Investigational hearings.  

Code of Federal Regulations, 2011 CFR

... Commercial Practices CONSUMER PRODUCT SAFETY COMMISSION FLAMMABLE FABRICS ACT REGULATIONS INVESTIGATIONS, INSPECTIONS AND INQUIRIES PURSUANT TO THE FLAMMABLE FABRICS ACT Procedures for Investigations, Inspections and Inquiries §...

2011-01-01

288

Investigation of irradiated soil byproducts.  

PubMed

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

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

2001-01-01

289

Investigating the biology of consciousness.  

PubMed Central

The fact that consciousness is a private, first-person phenomenon makes it more difficult to study than other cognitive phenomena that, although being equally private, also have characteristic behavioural signatures. Nonetheless, by combining cognitive and neurobiological methods, it is possible to approach consciousness, to describe its cognitive nature, its behavioural correlates, its possible evolutionary origin and functional role; last but not least, it is possible to investigate its neuroanatomical and neurophysiological underpinnings. In this brief essay I distinguish between two kinds of consciousness: core consciousness and extended consciousness. Core consciousness corresponds to the transient process that is incessantly generated relative to any object with which an organism interacts, and during which a transient core self and transient sense of knowing are automatically generated. Core consciousness requires neither language nor working memory, and needs only a brief short-term memory. Extended consciousness is a more complex process. It depends on the gradual build-up of an autobiographical self, a set of conceptual memories pertaining to both past and anticipated experiences of an individual, and it requires conventional memory. Extended consciousness is enhanced by language. PMID:9854259

Damasio, A R

1998-01-01

290

Experimental investigation of sputtering mechanism  

NASA Astrophysics Data System (ADS)

A low-pressure tetrode sputtering system with the use of two permanent magnets is introduced. Positive Ar ions in the plasma confined to a narrow column by the magnetic field bombard the target of - 1kV. The structure of the films deposited by sputtering and the surface structure of the target bombarded by the ions are investigated by SEM. The SEM pictures shows that the films are composed of accumulated solid particles, and that many smooth projections are distributed on the target surface, which was in a state of melt during the bombardment, some projections having cavities similar to craters of volcanoes. Thus, it is considered that the particles are ejected from the target as melted droplets and solidified by the radiation loss of heat during their flight to the substrate, and that the ejections are due to explosions of bubbles formed by gases contained in the melt. This idea of particle ejections contradicts apparently the atomic evaporation theory, which is supported by the Stern-Gerlach experiments. This contradiction, however, can be avoided if we consider that the atom beams in the experiment are formed by atoms effused from the slit of the oven, in which droplets ejected from the melt are finally dissolved into single atoms by their successive collision against the walls of the oven.

Yamaguti, Tasaburô; Watanabe, Yasuyoshi

1980-01-01

291

Gelled MMH hypergolic droplet investigation  

NASA Astrophysics Data System (ADS)

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

Solomon, Yair

292

Tribological investigation of oriented HDPE.  

PubMed

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

Hoseini, Mohammed; Lausmaa, Jukka; Boldizar, Antal

2002-09-15

293

Predictive biomarkers investigated in glioblastoma.  

PubMed

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

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

2014-09-01

294

Combinatorial Investigations of Interfacial Failure  

NSDL National Science Digital Library

Conventional measurements of interfacial strength focus on a single variable, whereas many variables couple nontrivially and simultaneously to de?ne this property. We present a combinatorial methodology that allows the effects of multivariable environments on interfacial strength to be investigated in a high-throughput, parallel, and quantitative manner. This technique is largely based on the theory of Johnson, Kendall, and Roberts that quanti?es adhesion through the contact and separation of a spherical lens and ?at substrate. For our experiments, we fabricated a combinatorial library consisting of a two-dimensional array of spherical caps and a complementary substrate. The array of spherical caps was brought into contact and subsequently separated from the substrate, whereas the relative displacement and contact area of the individual lenses were recorded. With gradient library-fabrication methods, two adhesion-controlling parameters can be continuously varied along the orthogonal axes of the array. In this manner, each lens quanti?es the interfacial strength at a unique point in parameter space. We demonstrate this multilens contactadhesion test by measuring the effect of temperature and coating thickness on the self-adhesion of polystyrene thin ?lms. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 883–891, 2003

Crosby, Alfred

2003-01-01

295

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

296

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

297

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 investigator’s FDA form 1572.

298

Bioanalysis young investigator: Sathyadevi Venkataramani.  

PubMed

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

Venkataramani, Sathyadevi

2012-05-01

299

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

300

QUANTITATIVE INVESTIGATIONS OF IDIOTYPIC ANTIBODIES  

PubMed Central

Specifically purified anti-p-azobenzoate antibodies of the IgG class from individual rabbits were used to elicit anti-idiotypic antibodies in recipient rabbits. Allotypes of each donor and recipient were matched. When polymerized antibodies were used for immunization, more than 80% of the recipients responded with the formation of antibodies that precipitated the monomeric donor antibody. Percentages of precipitable molecules in the donor antibody population (D) varied from 4 to 56. As little as 4% was readily detectable by the Ouchterlony method or precipitin test. Specificity of the reaction was tested by double diffusion in agar gel against a panel of purified antibenzoate antibodies from 14 heterologous rabbits and, quantitatively, in three systems by measurement of the extent of coprecipitation of heterologous, radiolabeled antibenzoate antibodies. No cross-reactions were observed. Reactions were shown to be attributable to antibenzoate antibodies in the donor serum, and contributions of allotypic reactions were excluded. In three systems investigated quantitatively, and in one studied qualitatively, two recipients of the same donor antibody produced anti-antibody that reacted with essentially the same subfraction of the donor antibody population. The findings that only a portion of the D population is immunogenic, and that the same subfraction is frequently immunogenic in different recipients, suggest that the immunogenic population comprises a limited number of homogeneous groups of antibody molecules. This is supported by the small number of bands usually observed by the Ouchterlony technique. Quantitative methods of analysis should provide an approach to the study of cell populations producing antibodies of a particular idiotype. PMID:5347693

Daugharty, Harry; Hopper, John E.; MacDonald, A. Bruce; Nisonoff, Alfred

1969-01-01

301

Athena Mars rover science investigation  

USGS Publications Warehouse

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

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

2003-01-01

302

Introducing The Process of Investigative Science  

NSDL National Science Digital Library

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

Linda Akiyama

2012-03-22

303

LISA telescope spacer design investigations  

NASA Astrophysics Data System (ADS)

The Laser Interferometer Space Antenna (LISA) is a space-based gravitational wave observa-tory with the goal of observing Gravitational Waves (GWs) from astronomical sources in a frequency range from 30 µHz to 0.1 Hz. The detection of GWs at such low frequency requires measurements of distances at the pico-meter level between bodies separated by 5 million kilo-meters. The LISA mission consists of three identical spacecraft (SC) separated by 5 × 106 km forming an equilateral triangle. Each SC contains two optical assemblies and two vacuum en-closures housing one proof mass (PM) in geodesic (free fall) motion each. The two assemblies on one SC are each pointing towards an identical assembly on each of the other two SC to form a non-equal arm interferometer. The measurement of the GW strain is done by measuring the change in the length of the optical path between the PMs of one arm relative to the other arms caused by the pass of a GW. An important element of the Interferometric Measurement System (IMS) is the telescope which, on one hand, gathers the light coming from the far SC (˜100 pW) and, on the other hand, expands and collimates the small outgoing beam ( 1 W) and sends it to the far SC. Due to the very demanding sensitivity requirements care must be taken in the design and validation of the telescope not to degrade the IMS performance. For instance, the diameter of the telescope sets the the shot noise of the IMS and depends critically on the diameter of the primary and the divergence angle of the outgoing beam. As the telescope is rather fast telescope, the divergence angle is a critical function of the overall separation between the primary and secondary. Any long term changes of the distance of more than a a few micro-meter would be detrimental to the LISA mission. Similarly challenging are the requirements on the in-band path-length noise for the telescope which has to be kept below 1 pm Hz-1/2 in the LISA band. Different configurations (on-axis/off axis) and materials such as Silicon Carbide (SiC) and Carbon Fiber Reinforced Plastic (CFRP) are considered to be used in the telescope spacer structure. We will describe our experimental efforts to understand and quantify the behavior of different materials and also discuss a first investigation of a specific on-axis SiC telescope spacer for LISA. This work is supported by NASA contract 00069955.

Sanjuan, Josep; Mueller, Guido; Livas, Jeffrey; Preston, Alix; Arsenovic, Petar; Castellucci, Kevin; Generie, Joseph; Howard, Joseph; Stebbins, Robin

304

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

305

Investigating Reaction-Driven Cracking  

NASA Astrophysics Data System (ADS)

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

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

2013-12-01

306

Cancer Clinical Investigator Team Leadership Award (CCITLA)  

Cancer.gov

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

307

21 CFR 1230.33 - Investigations.  

Code of Federal Regulations, 2012 CFR

...FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations...investigations, including the inspection of premises where dangerous caustic and corrosive substances subject to the act are...

2012-04-01

308

21 CFR 1230.33 - Investigations.  

Code of Federal Regulations, 2013 CFR

...FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations...investigations, including the inspection of premises where dangerous caustic and corrosive substances subject to the act are...

2013-04-01

309

21 CFR 1230.33 - Investigations.  

Code of Federal Regulations, 2011 CFR

...FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations...investigations, including the inspection of premises where dangerous caustic and corrosive substances subject to the act are...

2011-04-01

310

21 CFR 1230.33 - Investigations.  

Code of Federal Regulations, 2010 CFR

...FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations...investigations, including the inspection of premises where dangerous caustic and corrosive substances subject to the act are...

2010-04-01

311

21 CFR 1230.33 - Investigations.  

Code of Federal Regulations, 2014 CFR

...FOOD AND DRUG ADMINISTRATION REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT Administrative Procedures § 1230.33 Investigations...investigations, including the inspection of premises where dangerous caustic and corrosive substances subject to the act are...

2014-04-01

312

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2011 CFR

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

2011-10-01

313

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2014 CFR

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

2014-10-01

314

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2012 CFR

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

2012-10-01

315

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2013 CFR

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

2013-10-01

316

50 CFR 300.41 - Investigation notification.  

Code of Federal Regulations, 2010 CFR

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

2010-10-01

317

78 FR 63988 - Clinical Investigator Training Course  

Federal Register 2010, 2011, 2012, 2013, 2014

...investigators in understanding what preclinical and clinical information is needed...ethical obligations of clinical research, and acceptable scientific and...investigator's brochure,'' i.e., the preclinical information (toxicology,...

2013-10-25

318

77 FR 60440 - Clinical Investigator Training Course  

Federal Register 2010, 2011, 2012, 2013, 2014

...investigators in understanding what preclinical and clinical information is needed...ethical obligations of clinical research, and acceptable scientific and...investigator's brochure,'' i.e., the preclinical information (toxicology,...

2012-10-03

319

10 CFR 590.109 - FE investigations.  

Code of Federal Regulations, 2010 CFR

10 Energy 4 2010-01-01 2010-01-01 false FE investigations. 590.109 Section 590.109 Energy ...AND EXPORT OF NATURAL GAS General Provisions § 590.109 FE investigations. The Assistant Secretary or the Assistant...

2010-01-01

320

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.

Melissa Olson

321

BIM Anatomy An investigation into implementation prerequisites  

E-print Network

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

322

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

323

Clinical investigation program, fiscal year 1991  

Microsoft Academic Search

Subject report identifies the research activities conducted at William Beaumont Army Medical Center by investigators who had protocols approved by the Clinical Investigation Committee, the Institutional Review Board, and the Animal Use Committee. This report includes all protocols registered with the Department of Clinical Investigation during FY 1991. All known presentations and publications are also included. The research protocols described

Manuel Schydlower

1992-01-01

324

Modern accident investigation – Four major challenges  

Microsoft Academic Search

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

Sverre Roed-Larsen; John Stoop

325

Mathematical Investigations--Powerful Learning Situations.  

ERIC Educational Resources Information Center

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

Chapin, Suzanne H.

1998-01-01

326

Kinesthetic Investigations in the Physics Classroom  

ERIC Educational Resources Information Center

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

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

2014-01-01

327

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

328

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

329

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

330

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

NSDL National Science Digital Library

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

Paul Davis

331

Clinical investigation program, fiscal year 1991  

NASA Astrophysics Data System (ADS)

Subject report identifies the research activities conducted at William Beaumont Army Medical Center by investigators who had protocols approved by the Clinical Investigation Committee, the Institutional Review Board, and the Animal Use Committee. This report includes all protocols registered with the Department of Clinical Investigation during FY 1991. All known presentations and publications are also included. The research protocols described were conducted under the provisions of AR 40-38 (Clinical Investigation Program); AR 40-7 (Use of Investigational Drugs in Humans and the Use of Schedule 1 Controlled Substances); AR 70-25 (Usle of Volunteers as Subjects of Research); HSC 40-32 (Management of Clinical Investigation Protocols and Reports); and AR 70-18 (The Use of Animals in DOS programs).

Schydlower, Manuel

1992-02-01

332

INVESTIGATION Emergent Neutrality in Adaptive Asexual Evolution  

E-print Network

INVESTIGATION Emergent Neutrality in Adaptive Asexual Evolution Stephan Schiffels,*,1 Gergely J the speed of adaptation in large asexual populations (Fisher 1930; Muller 1932; Smith 1971; Felsenstein 1974

Lässig, Michael

333

Concept Mapping for Digital Forensic Investigations  

NASA Astrophysics Data System (ADS)

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

Tanner, April; Dampier, David

334

Manual on Subsurface Investigations National Highway Institute  

E-print Network

in subsurface investigation, exploration methods, equipment types and their suitability are discussed. Various methods are covered. Laboratory index, strength, and stiffness testing are reviewed in complement

Mayne, Paul W.

335

Advanced Propulsion Physics Lab: Eagleworks Investigations  

NASA Technical Reports Server (NTRS)

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

Scogin, Tyler

2014-01-01

336

Postgraduate Medical Education Clinician Investigator Program (CIP)  

E-print Network

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

Hitchcock, Adam P.

337

39 CFR 230.4 - Arrest and investigative powers of criminal investigators.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Arrest and investigative powers of criminal investigators...General Policy and Authority § 230.4 Arrest and investigative powers of criminal investigators...authority of the United States; (2) Make arrests without warrant for offenses...

2014-07-01

338

39 CFR 230.4 - Arrest and investigative powers of criminal investigators.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Arrest and investigative powers of criminal investigators...General Policy and Authority § 230.4 Arrest and investigative powers of criminal investigators...authority of the United States; (2) Make arrests without warrant for offenses...

2012-07-01

339

39 CFR 230.4 - Arrest and investigative powers of criminal investigators.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Arrest and investigative powers of criminal investigators...General Policy and Authority § 230.4 Arrest and investigative powers of criminal investigators...authority of the United States; (2) Make arrests without warrant for offenses...

2010-07-01

340

39 CFR 230.4 - Arrest and investigative powers of criminal investigators.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Arrest and investigative powers of criminal investigators...General Policy and Authority § 230.4 Arrest and investigative powers of criminal investigators...authority of the United States; (2) Make arrests without warrant for offenses...

2013-07-01

341

39 CFR 230.4 - Arrest and investigative powers of criminal investigators.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Arrest and investigative powers of criminal investigators...General Policy and Authority § 230.4 Arrest and investigative powers of criminal investigators...authority of the United States; (2) Make arrests without warrant for offenses...

2011-07-01

342

78 FR 5276 - Tribal Background Investigations and Licensing  

Federal Register 2010, 2011, 2012, 2013, 2014

...regulatory investigations or prosecutions...license, or investigations of activities...Background investigations. A tribe shall...background investigation for each primary...prosecution or a conviction, the...

2013-01-25

343

76 FR 79567 - Tribal Background Investigations and Licensing  

Federal Register 2010, 2011, 2012, 2013, 2014

...regulatory investigations or prosecutions...license, or investigations of activities...Background investigations. A tribe shall...background investigation for each primary...prosecution or a conviction, the...

2011-12-22

344

History Scene Investigations: From Clues to Conclusions  

ERIC Educational Resources Information Center

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

McIntyre, Beverly

2011-01-01

345

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

346

Goals, Objectives, and Investigations for Venus Exploration  

E-print Network

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

Rathbun, Julie A.

347

Expanding Cooperative Learning through Group Investigation.  

ERIC Educational Resources Information Center

This book provides educators with the background and procedures needed to conduct group investigation, a method for classroom instruction in which students work collaboratively in small groups to examine, experience, and understand their topic of study. Significantly different from traditional instruction, group investigation is designed to appeal…

Sharan, Yael; Sharan, Shlomo

348

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

349

Teaching Adult Students Mathematical Investigations-6.  

ERIC Educational Resources Information Center

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

Angiama, R. O.

350

Investigating Child Language Acquisition through Computational Modelling  

E-print Network

Investigating Child Language Acquisition through Computational Modelling Kris Jack, Chris Reed modelling of language acquisition tend to investigate particular behaviours such as lexical acquisition. This problem is no more evident than in the area of first language acquisition. Children acquire language

Hammerton, James

351

Investigations: A Mathematical Cornucopia of Pumpkins  

NSDL National Science Digital Library

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

Glenn Gebhard

352

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

353

The Power of Investigative Calculus Projects  

ERIC Educational Resources Information Center

This article describes investigative calculus projects in which students explore a question or problem of their own construction. Three exemplary pieces of student work are showcased. Investigative calculus projects are an excellent way to foster student understanding and interest in calculus. (Contains 4 figures.)

Perrin, John Robert; Quinn, Robert J.

2008-01-01

354

Investigating Conscious Experience through the Beeper Project  

ERIC Educational Resources Information Center

The Experience Sampling Method (ESM; Larson & Csikszentmihalyi, 1983) is a means to investigate the subjective experiences of individuals as they go about their daily lives. Students from 2 Adolescent Psychology courses used the ESM in a required "beeper project." Student research teams investigated a typical week in the life of an adolescent by…

Punzo, Vincent A.; Miller, Emily

2002-01-01

355

Hydrodynamic investigation of the AUV PICASSO  

Microsoft Academic Search

JAMSTEC developed the AUV PICASSO for study of the deep-sea plankton and marine snow. To obtain adequate cruising performance such as propulsive performance and maneuverability, investigation of hydrodynamic performance is of necessity. The authors conducted the investigations of hydrodynamic performance of the AUV PICASSO such as a water resistance of hull with the numerical analysis - CFD and the experiments

Tomoya Inoue; Hiroyoshi Suzuki; Atsushi Yamamichi; Risa Kitamoto; Yoshitaka Watanabe; Hiroshi Yoshida

2011-01-01

356

Mars Climate Orbiter Mishap Investigation Board  

E-print Network

Mars Climate Orbiter Mishap Investigation Board Phase I Report November 10, 1999 #12;2 Table of Contents Mars Climate Orbiter Mishap Investigation Board Phase I Report Page Signature Page (Board Members) 3 List of Consultants 4 Acknowledgements 5 Executive Summary 6 1. Mars Climate Orbiter (MCO

Leveson, Nancy

357

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

358

Investigational Drug/Device Accountability Policy Introduction  

E-print Network

of Investigational drugs/devices Store investigational drugs/devices in a secure environment with access limited and retain all returned, used study article containers/units/devices and store in a secure environment or device is used in the manner intended by the research project, is stored under appropriate controlled

Subramanian, Venkat

359

Training rail accident investigators in UK  

Microsoft Academic Search

In the UK a number of high severity rail accidents, combined with structural change in the rail industry led to the need for revised accident investigation procedures. The revised procedure addressed identified issues with accident investigation, but to ensure maximum benefit in terms of identification of underlying causes of accidents and the production of good recommendations, training for rail industry

Stephen Watson

2004-01-01

360

Assessment, investigation, and management of acute monoarthritis  

Microsoft Academic Search

Trauma is the commonest cause of acute monoarticular joint pain and swelling in patients attending an accident and emergency (A&E) department. However, in a significant minority of patients there will be no history of trauma and consequently a different approach to assessment and investigation is required. Our aim is to offer an outline of how to assess, investigate, and manage

S H Till; M L Snaith

1999-01-01

361

Psycholinguistic and neurolinguistic investigations of scalar implicature  

E-print Network

PSYCHOLINGUISTIC AND NEUROLINGUISTIC INVESTIGATIONS OF SCALAR IMPLICATURE By Stephen Politzer-Ahles Submitted to the graduate degree program in Linguistics and the Graduate Faculty of the University of Kansas in partial fulfillment...: PSYCHOLINGUISTIC AND NEUROLINGUISTIC INVESTIGATIONS OF SCALAR IMPLICATURE ________________________________ Chairperson Robert Fiorentino Date approved: 23 April 2013 iii ABSTRACT The present study examines the representation...

Politzer-Ahles, Stephen

2013-05-31

362

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

363

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.

364

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

365

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

366

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

367

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

368

Investigation of Outbreaks Complicated by Universal Exposure  

PubMed Central

Outbreaks in which most or all persons were exposed to the same suspected source of infection, so-called universal exposure, are common. They represent a challenge for public health specialists because conducting analytical studies in such investigations is complicated by the absence of a nonexposed group. We describe different strategies that can support investigations of outbreaks with universal exposure. The value of descriptive epidemiology, extensive environmental investigation, and the hypothesis-generation phase cannot be overemphasized. An exposure that seems universal may in fact not be universal when additional aspects of the exposure are taken into account. Each exposure has unique characteristics that may not be captured when investigators rely on the tools readily at hand, such as standard questionnaires. We therefore encourage field epidemiologists to be creative and consider the use of alternative data sources or original techniques in their investigations of outbreaks with universal exposure. PMID:23092616

Bousema, Teun; Oliver, Isabel

2012-01-01

369

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

370

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

371

Radar investigation of the Hockley salt dome  

E-print Network

RADAR INVESTIGATION OF T}IE HOCVLEY SA11 DOME A Thesis JAMES ANDREW HLUCHANEK Submi ted to the Graduate College ot Texas ARM Univorsity in partial fulfillment of the requirement for the degree of. MASTFR OF SCIFNCE N". y 1973 Major Suhject...: Geophysics RADAR INVESTIGATION OF THE HOCKLEY SALT DOME A Thesis by UAMES ANDREW HLUCHANEK A'pproved as to style and content by: (Head of Departme t ? Member) May 1. 973 ABSTRACT Radar investigation of the Hockley Salt Dome. . (Nay, 1973) James...

Hluchanek, James Andrew

1973-01-01

372

How Might You Investigate Scientific Phenomena  

NSDL National Science Digital Library

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

TERC (www.terc.edu)

373

INVESTIGATION OF BULK POWER ERCOT (Texas)  

E-print Network

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

Laughlin, Robert B.

374

Investigation of asymmetric plasma blob dynamics  

E-print Network

The dynamics of asymmetric blobs is investigated in the Versatile Toroidal Facility (VTF) at MIT. Blobs are local regions of enhanced plasma density. Blobs are relevant to several areas of physics research, including fusion ...

Soane, Alexander (Alexander Visotsky)

2009-01-01

375

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Agency investigations. 2638.503 Section...OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective...in Cases Involving Individual Executive Agency Employees § 2638.503 Agency...

2011-01-01

376

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Agency investigations. 2638.503 Section...OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective...in Cases Involving Individual Executive Agency Employees § 2638.503 Agency...

2010-01-01

377

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Agency investigations. 2638.503 Section...OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective...in Cases Involving Individual Executive Agency Employees § 2638.503 Agency...

2014-01-01

378

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Agency investigations. 2638.503 Section...OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective...in Cases Involving Individual Executive Agency Employees § 2638.503 Agency...

2013-01-01

379

5 CFR 2638.503 - Agency investigations.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Agency investigations. 2638.503 Section...OFFICE OF GOVERNMENT ETHICS AND EXECUTIVE AGENCY ETHICS PROGRAM RESPONSIBILITIES Corrective...in Cases Involving Individual Executive Agency Employees § 2638.503 Agency...

2012-01-01

380

18 CFR 808.12 - Investigative powers.  

Code of Federal Regulations, 2010 CFR

...Resources SUSQUEHANNA RIVER BASIN COMMISSION HEARINGS AND ENFORCEMENT...or investigate any person or project to determine compliance...necessary to assure that any project is constructed, operated...to inspect all areas where a project is being constructed,...

2010-04-01

381

Jigsaw: Supporting Investigative Analysis through Interactive Visualization  

E-print Network

Jigsaw: Supporting Investigative Analysis through Interactive Visualization John Stasko Carsten G a visual analytic system called Jigsaw that represents documents and their entities visually in order quickly. Jigsaw provides multiple coordinated views of document entities with a special emphasis

Stasko, John T.

382

A Computer Investigation of the Educational Process  

ERIC Educational Resources Information Center

Examines the role of computers in investigating teaching and learning processes and concludes that computer based experiments can be effective if they meet the same requirements that must be met by direct instruction techniques. (Author/DB)

Orlov, I. A.; And Others

1976-01-01

383

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...

384

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

385

Glassy materials investigated for nuclear reactor applications  

NASA Technical Reports Server (NTRS)

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

Lynch, E. D.

1968-01-01

386

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2010 CFR

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

2010-10-01

387

Investigating Plant Physiology with Wisconsin Fast Plants  

NSDL National Science Digital Library

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

The Wisconsin Fast Plants Program

388

Investigation of Variables Associated with Vaccine Acceptance  

E-print Network

Abstract The current study investigated the relationship between the Health Belief Model (HBM) framework, social variables, personality factors, and H1N1 flu vaccine acceptance. Four hundred thirty two undergraduate students completed online...

Black, Lora L.

2011-12-31

389

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2010 CFR

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

2010-04-01

390

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.

Paula Derickson

391

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...

392

77 FR 44174 - Procedures for Safety Investigations  

Federal Register 2010, 2011, 2012, 2013, 2014

...investigations. 1708.110 Multiple interests. 1708.111 Sequestration of witnesses. 1708.112 Appearance and practice before...attorney from being present during testimony. Sec. 1708.111 Sequestration of witnesses. (a) Witnesses shall be sequestered...

2012-07-27

393

Investigating Ecosystems: Determining Feeding Relationships among Organisms  

NSDL National Science Digital Library

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

Anna Potvin, Pine City Secondary, Pine City, MN

394

Interactive eshopping experience: an empirical investigation  

E-print Network

Utilizing an experimental design, the study investigates the effects of eshopping behavior (experiential, utilitarian, or mixed) and interactivity level (low or high) on the consequences of eshopping (site attitude and future purchase intentions...

Mahfouz, Ahmed Yousry Mohamed

2005-02-17

395

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

396

Investigative study of holographic recording materials development  

NASA Technical Reports Server (NTRS)

The potential of certain cis-trans isomers and doped LiNbO3 for the holographic read/write/erase memory application was investigated. The cis-trans work involved the photochemical investigation of a number of potential materials as well as specific molecular engineering efforts on alpha-methyl stilbene and its derivatives. These efforts resulted in an increase in the change in index of refraction, and thereby, in potential recording utility, of an order of magnitude. The work on LiNbO3 was directed toward a preliminary investigation of the dynamics of the writing process. Several samples and a variety of writing conditions were investigated. An unexpected and as yet unexplained improvement in material behavior with continued recycling was observed. In addition, some effort was devoted to an analysis of the physical conditions under which several current theories of the optical damage process are valid.

1972-01-01

397

INVESTIGATION Genome Scans for Transmission Ratio  

E-print Network

INVESTIGATION Genome Scans for Transmission Ratio Distortion Regions in Mice Joaquim Casellas,*,,1, University of California, Davis, California 95616-8521, Departments of Medicine, Biochemistry and Molecular Genetics and Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia 22908

Yandell, Brian S.

398

Investigating packaging effects on bandgap references  

E-print Network

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

Palakodety, Ravi (Ravi Kiran)

2007-01-01

399

Date: ____________________________ Audited By: _____________________ Department: ____________________________ Principal Investigator: _____________________________  

E-print Network

: ____________________________ Principal Investigator: _____________________________ ______________________________ Building & Room (face velocity monitor, gauge, Kimwipe) Total number fume hood and certification dates Inspection tag storage areas neat and clean Flammable storage within allowable limits (NYCFD) Segregation of incompatible

Jia, Songtao

400

Investigation of shielding from cosmic radiation  

NASA Technical Reports Server (NTRS)

Shielding from cosmic radiation is investigated. Attenuation of high energy protons in shielding material is noted and accumulations of radiation doses due to nuclear interactions in the shielding are studied. Shielding of artificial earth satellites is described.

Dubkin, V. Y.; Kovalev, Y. Y.; Skvortsov, S. S.; Smirennyy, L. N.; Vikhrov, A. I.

1973-01-01

401

Mechanisms of superconductivity investigated by nuclear radiation  

NASA Technical Reports Server (NTRS)

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

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

1967-01-01

402

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.

403

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

404

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.

405

7 CFR 948.31 - Investigation.  

Code of Federal Regulations, 2010 CFR

... AGRICULTURAL MARKETING 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...

2010-01-01

406

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2012 CFR

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

2012-10-01

407

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2013 CFR

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

2013-10-01

408

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2011 CFR

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

2011-10-01

409

49 CFR 661.15 - Investigation procedures.  

Code of Federal Regulations, 2014 CFR

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

2014-10-01

410

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.

411

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2013 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

412

25 CFR 556.4 - Background investigations.  

Code of Federal Regulations, 2014 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...

2014-04-01

413

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.

414

A data accounting system for clinical investigators.  

PubMed

Clinical investigators often preprocess, process, and analyze their data without benefit of formally organized research centers to oversee data management. This article outlines a practical three-file structure to help guide these investigators track and document their data through processing and analyses. The proposed process can be implemented without additional training or specialized software. Thus, it is particularly well suited for research projects with small budgets or limited access to viable research/data coordinating centers. PMID:17460138

Kashner, T Michael; Hinson, Robert; Holland, Gloria J; Mickey, Don D; Hoffman, Keith; Lind, Lisa; Johnson, Linda D; Chang, Barbara K; Golden, Richard M; Henley, Steven S

2007-01-01

415

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

416

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

417

Geologic investigations of outer planets satellites  

NASA Technical Reports Server (NTRS)

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

Strom, R. G.

1984-01-01

418

Investigation of laser polarized xenon magnetic resonance  

NASA Technical Reports Server (NTRS)

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

Walsworth, Ronald L.

1998-01-01

419

Investigation of dielectric overlay microstrip circuits  

E-print Network

INVESTIGATION OF DIELECTRIC OVERLAY MICROSTRIP CIRCUITS A Thesis by JAMES LOUIS KLEIN Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1988 Major... Subject: Electrical Engineering INVESTIGATION OF DIELECTRIC OVERLAY MICRO STRIP CIRCUITS A Thesis by JAMES LOUIS KLEIN Approved as to style and content by: Kai Chang Robert D. Nevels (Member) Krzysztof A. Michalski (Member) Mark H. Weichold...

Klein, James Louis

1988-01-01

420

Cancer Prevention and Control Investigators Meeting  

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) focus for cancer control and prevention research for the future. In addition to discussing the yearlong deliberation of the CCOP Strategic Issues and Priorities, which have been approved by the NCI leadership, the priorities of the new Director of the Division of Cancer Prevention will be discussed.

421

The SIR-B science investigations plan  

NASA Technical Reports Server (NTRS)

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

1984-01-01

422

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

423

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.

424

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

425

Police investigations: discretion denied yet undeniably exercised  

PubMed Central

Police investigations involve determining whether a crime has been committed, and if so what type of crime, who has committed it and whether there is the evidence to charge the perpetrators. Drawing on fieldwork in Delhi and Mumbai, this paper explores how police investigations unfolded in the specific context of women’s deaths by burning in India. In particular, it focuses on the use of discretion despite its denial by those exercising it. In India, there are distinctive statutes relating to women’s suspicious deaths, reflecting the widespread expectation that the bride’s family will pay a dowry to the groom’s family and the tensions to which this may on occasion give rise in the early years of a marriage. Often, there are conflicting claims influencing how the woman’s death is classified. These in turn affect police investigation. The nature and direction of police discretion in investigating women’s deaths by burning reflect in part the unique nature of the legislation and the particular sensitivities in relation to these types of death. They also highlight processes that are liable to be at work in any crime investigation. It was found that police officers exercised unacknowledged discretion at seven specific points in the investigative process, with potentially significant consequences for the achievement of just outcomes: first response, recording the victim’s ‘dying declaration’, inquest, registering of the ‘First Information Report’, collecting evidence, arrest and framing of the charges.

Belur, J.; Tilley, N.; Osrin, D.; Daruwalla, N.; Kumar, M.; Tiwari, V.

2014-01-01

426

Application of geophysics to acid mine drainage investigations. Volume 2. Site investigations  

Microsoft Academic Search

The report describes geophysical field investigations undertaken to evaluate the utility of surface geophysical techniques in detecting and monitoring groundwater pollution from mine waste in the Western United States. The document addresses results of investigations at Spenceville Copper Mine, Leviathan Sulfur Mine, Iron Mountain Copper Mine, and Walker Copper Mine. Methods used in the field investigations included conventional D.C. resistivity,

Custis

1994-01-01

427

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

ERIC Educational Resources Information Center

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

Moeed, Azra

2013-01-01

428

Environmental investigations in China - Lessons learned  

SciTech Connect

Western manufacturing companies seeking to build or acquire manufacturing capacity in China will likely need to perform an environmental assessment or environmental investigation of an existing enterprise facility, or of a greenfield site for a new facility. The purpose of the environmental assessment or investigation is to assess and investigate the potential presence of hazardous contamination and the potential liabilities associated with a facility or site as a result of the past and present use of the property. Types of environmental investigations in China have included the following: Environmental site assessments (Phase 1); Environmental site investigations (Phase 2); Environmental impact assessments (EIA); Environmental pollution abatement plans (air, water); Institutional strengthening projects (lending institutions); and mine waste management (China National Non-Ferrous Metals Corporation). This article will examine the realities and logistics of performing environmental site assessments (ESAs) in China. It will provide a discussion of the following items: environmental concerns; standards used for ESAs environmental regulations; information sources for ESAs; drilling contractors for soil and groundwater sampling; materials for construction of monitoring wells; analytical laboratories; and work authorization and government documentation.

Scott, J.C. [Woodward-Clyde International, Denver, CO (United States); Couldwell, C. [Woodward-Clyde International, Auckland (New Zealand)

1997-12-31

429

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.

430

Cyber Forensics Ontology for Cyber Criminal Investigation  

NASA Astrophysics Data System (ADS)

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

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

431

Investigation of organic adhesives for hybrid microcircuits  

NASA Technical Reports Server (NTRS)

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

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

1975-01-01

432

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

433

Laboratory Investigations into the Extreme Universe  

E-print Network

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 investigations 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 fundamental physics in extreme limits. We give examples of possible laboratory experiments that investigate into the extreme universe.

Pisin Chen

2003-03-15

434

Columbia Accident Investigation Board Report. Volume 3  

NASA Technical Reports Server (NTRS)

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

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

2003-01-01

435

Laboratory investigation of constitutive property scaling behavior  

SciTech Connect

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

Tidwell, V.C.

1994-10-01

436

A European approach to clinical investigator training.  

PubMed

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

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

2013-01-01

437

An investigation of symptoms predating CFS onset.  

PubMed

The Fukuda et al. (1994) criteria for chronic fatigue syndrome (CFS) specifies that a symptom can only be included within a diagnosis if it is experienced concurrently or following the onset of fatigue. In order to investigate this issue, participants provided information on persisting symptoms (lasting greater than six months) and whether those symptoms occurred prior to, concurrently, or following the onset of their fatigue. More symptoms were experienced after the fatigue onset than prior to the fatigue onset; however, a considerable number of participants reported experiencing persisting symptoms prior to the onset of CFS. Particularly, rates of hay fever and asthma were higher prior to the illness. Investigating symptoms prior to the onset of the illness might provide investigators with ways to better understand the etiology of this illness. PMID:25584528

Evans, Meredyth; Barry, Morgan; Im, Young; Brown, Abigail; Jason, Leonard A

2015-01-01

438

Independent accident investigation: a modern safety tool.  

PubMed

Historically, safety has been subjected to a fragmented approach. In the past, every department has had its own responsibility towards safety, focusing either on working conditions, internal safety, external safety, rescue and emergency, public order or security. They each issued policy documents, which in their time were leading statements for elaboration and regulation. They also addressed safety issues with tools of various nature, often specifically developed within their domain. Due to a series of major accidents and disasters, the focus of attention is shifting from complying with quantitative risk standards towards intervention in primary operational processes, coping with systemic deficiencies and a more integrated assessment of safety in its societal context. In The Netherlands recognition of the importance of independent investigations has led to an expansion of this philosophy from the transport sector to other sectors. The philosophy now covers transport, industry, defense, natural disaster, environment and health and other major occurrences such as explosions, fires, and collapse of buildings or structures. In 2003 a multi-sector covering law will establish an independent safety board in The Netherlands. At a European level, mandatory investigation agencies are recognized as indispensable safety instruments for aviation, railways and the maritime sector, for which EU Directives are in place or being progressed [Transport accident and incident investigation in the European Union, European Transport Safety Council, ISBN 90-76024-10-3, Brussel, 2001]. Due to a series of major events, attention has been drawn to the consequences of disasters, highlighting the involvement of rescue and emergency services. They also have become subjected to investigative efforts, which in return, puts demands on investigation methodology. This paper comments on an evolutionary development in safety thinking and of safety boards, highlighting some consequences for strategic perspectives in a further development of independent accident investigation. PMID:15231346

Stoop, John A

2004-07-26

439

Wildlife health investigations: needs, challenges and recommendations.  

PubMed

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

Ryser-Degiorgis, Marie-Pierre

2013-01-01

440

Parasexuality in genitourinary investigations: a qualitative study  

PubMed Central

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

2014-01-01

441

Investigation of Dendrimer-Membrane Interactions  

NASA Astrophysics Data System (ADS)

Modified Polyamidoamine (PAMAM) dendrimers show great promise as targeted drug transport agents. Current research efforts point to the possibility of dramatic improvements to conventional chemotherapy by selectively delivering a therapeutic to antigen bearing tumor cells. In order to better understand the uptake mechanism of such devices into cells we are investigating dendrimer-surface adsorption and dendrimer-membrane interactions using atomic force microscopy, light scattering and computer simulations. Model systems consisting of supported DMPC lipid bilayers have shown interesting results suggesting the shape and architecture of nano-devices play an important role for their biologic activity. We are also investigating the effect of targeted drug vehicles on cells in vitro.

Mecke, Almut; Hessler, Jessica; Lee, Inhan; Banaszak Holl, Mark; Orr, Bradford; Patri, Anil K.; Baker, J. R.

2003-03-01

442

Investigation of sands subjected to dynamic loading  

E-print Network

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

Reeves, Gary Neil

1967-01-01

443

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

444

Spectroscopic investigation of Nd3+ in ASL  

Microsoft Academic Search

Nd3+-activated strontium lanthanum aluminate Sr1-xNdyLax-yMgxAl12-xO19 (ASL: Nd) crystals are investigated especially for 4F3\\/24I9\\/2 laser emission in 900 nm range. The optimisation of laser emission characteristics requires a detailed knowledge of spectral features and their dependence on composition. The spectral investigation of Nd3+ in ASL on an extended composition range (especially small x) reveals new spectral features. Connecting spectral and structural

A. Lupei; V. Lupei; C. Gheorghe; L. Gheorghe; D. Vivien; G. Aka

2005-01-01

445

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 monitoring procedures are developed and used in accordance with the PNL Quality Assurance Program.

Not Available

1992-12-01

446

Radio science investigations with Mars Observer  

NASA Technical Reports Server (NTRS)

Mars Observer radio science investigations focus on two major areas of study: the gravity field and the atmosphere of Mars. Measurement accuracies expressed as an equivalent spacecraft velocity are expected to be of the order of 100 microns/s (for both types of investigations) from use of an improved radio transponder for two-way spacecraft tracking and a highly stable on-board oscillator for atmospheric occultation measurements. Planned gravity investigations include a combination of classical and modern elements. A spherical harmonic (or equivalent) field model of degree and order in the range 30-50 will be obtained, while interpretation will be in terms of internal stress and density models for the planet, using the topography to be obtained from the Mars Observer laser altimeter. Atmospheric investigations will emphasize precision measurement of the thermal structure and dynamics in the polar regions, which are regularly accessible as a result of the highly inclined orbit. Studies based on the measurements will include polar processes, cycling of the atmosphere between the poles, traveling baroclinic disturbances, small-scale waves and turbulence, the planetary boundary layer, and (possibly) the variability and altitude of the ionosphere.

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

1992-01-01

447

Towards an Ontology of Data Mining Investigations  

NASA Astrophysics Data System (ADS)

Motivated by the need for unification of the domain of data mining and the demand for formalized representation of outcomes of data mining investigations, we address the task of constructing an ontology of data mining. In this paper we present an updated version of the OntoDM ontology, that is based on a recent proposal of a general framework for data mining and it is aligned with the ontology of biomedical investigations (OBI) . The ontology aims at describing and formalizing entities from the domain of data mining and knowledge discovery. It includes definitions of basic data mining entities (e.g., datatype, dataset, data mining task, data mining algorithm etc.) and allows extensions with more complex data mining entities (e.g. constraints, data mining scenarios and data mining experiments). Unlike most existing approaches to constructing ontologies of data mining, OntoDM is compliant to best practices in engineering ontologies that describe scientific investigations (e.g., OBI ) and is a step towards an ontology of data mining investigations. OntoDM is available at: http://kt.ijs.si/panovp/OntoDM/ .

Panov, Pan?e; Soldatova, Larisa N.; Džeroski, Sašo

448

Research Investigation of Information Access Methods  

ERIC Educational Resources Information Center

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

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

2006-01-01

449

Consumption-Saving Investigation: United States  

Microsoft Academic Search

This paper uses historical data from the United States to investigate the simple Keynesian consumption-income relationship. When structural breaks are taken into account, the theory of the simple Keynesian consumption function performs quite well in describing what is seen in the US data. Students and instructors of macroeconomic theory should be interested in these results, which demonstrate that the simple

Jamie Emerson

2011-01-01

450

INVESTIGATION A Screen for Germination Mutants in  

E-print Network

INVESTIGATION A Screen for Germination Mutants in Saccharomyces cerevisiae Anne Kloimwieder Spore germination in Saccharomyces cerevisiae is a process in which a quiescent cell begins to divide Saccharomyces cerevisiae germination sporulation ERG6 TRF4 In the budding yeast, Saccharomyces cerevisiae

Winston, Fred

451

Experimental Investigation of the Atomic Hafnium Anion  

Microsoft Academic Search

An experimental investigation has demonstrated that Hf^- is formed in a long-lived state (> 55 microseconds) that is most likely stable, and determined the electron affinity of hafnium. The experiments were performed using the Negative Ion Research Facility at the University of Nevada, Reno in a research collaboration with members of the Photonics Research Center at the United States Military

V. T. Davis; J. S. Thompson

2004-01-01

452

ARM Madden-Julian Oscillation Investigation Experiment  

ScienceCinema

Results of the ARM Madden-Julian Oscillation (MJO) Investigation Experiment (AMIE) field campaign are contributing significantly to concurrent national and international research efforts addressing questions about how the MJO initiates and changes as it passes phenomenon differs in observations versus models.

Long, Chuck

2014-06-13

453

INVESTIGATION Genotype Imputation Reference Panel Selection  

E-print Network

94305 ABSTRACT The recent dramatic cost reduction of next-generation sequencing technology enables, such as array data from genome-wide association studies, a cost-effective approach is to sequence a subset investigators to assess most variants in the human genome to identify risk variants for complex diseases

Rosenberg, Noah

454

Numerical Investigations of Polyester Coextrusion Instabilities  

E-print Network

Numerical Investigations of Polyester Coextrusion Instabilities O. Mahdaouia and P. Laureb,a and J polyesters for which Preprint submitted to Journal of Non-Newtonian Fluid Mechanics December 7, 2012 hal polyester patented formulations which present very different rheological properties. For some processing

Paris-Sud XI, Université de

455

Investigation of hot QCD matter: theoretical aspects  

NASA Astrophysics Data System (ADS)

This lecture presents an overview of the status of the investigation of the properties of the quark-gluon plasma using relativistic heavy ion collisions at the Relativistic Heavy Ion Collider and the Large Hadron Collider. It focuses on the insights that have been obtained by the comparison between experimental data from both facilities and theoretical calculations.

Müller, Berndt

2013-12-01

456

A practical plan for implementing investigative laboratories  

NSDL National Science Digital Library

This resource outlines methods developed to promote investigative instead of demonstrative laboratory exercises as means of teaching concepts and introducing students to the scientific process. Students are guided through a variety of modular studies from which they can then formulate and test their own hypotheses.

Jean L. Dickey, Robert J. Kosinski (Clemson University; )

1991-01-01

457

LAUSD's Business Services Center. An Investigative Report.  

ERIC Educational Resources Information Center

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

Armoudian, Maria

458

Investigating Competition in the Retail Petrol Market.  

ERIC Educational Resources Information Center

A questionnaire that college economics students can use to investigate the degree and nature of competition in the retail market for petrol is provided. A simple computer program is included to help in the analysis of the questionnaire. (Author/RM)

Davies, P.

1984-01-01

459

School Roles: A Way to Investigate Participation  

ERIC Educational Resources Information Center

Students who are more engaged in school have higher academic achievement, lower dropout rates, and increased involvement in activities during early adulthood. Unfortunately, children with disabilities participate less than children without disabilities, thus increasing their risk for depression and anxiety. This study investigated the lack of…

Specht, Jacqueline A.; King, Gillian A.; Servais, Michelle; Kertoy, Marilyn; Spencer, Terry

2011-01-01

460

34 CFR 33.4 - Investigation.  

Code of Federal Regulations, 2013 CFR

(1) The subpoena so issued must notify the person to whom it is addressed of the authority under which the subpoena is issued and must identify the records or documents sought; (2) The investigating official may designate a person to act on his or her behalf to receive the documents sought;...

2013-07-01

461

Investigating Preservice Teachers' Literature Selection Process.  

ERIC Educational Resources Information Center

This paper examines the literature selection and evaluation practices of preservice teachers, investigating trends in choosing and acquiring literature and factors affecting the literature's appeal. Participants were undergraduate students enrolled in a language arts course for elementary school majors who completed a survey and attached it to a…

Michna, Katie Charisse Neves

462

An Investigation of the SOAR Study Method  

ERIC Educational Resources Information Center

Students are rarely taught how to study. When study strategy instruction occurs, weak strategies are often advocated or strategies are presented in a hodgepodge leaving students without a systematic study plan. This experiment investigated a systematic study plan called SOAR that includes the components of "S"election, "O"rganization,…

Jairam, Dharma; Kiewra, Kenneth A.

2009-01-01

463

Bubbles, Bubbles: Integrated Investigations with Floating Spheres  

ERIC Educational Resources Information Center

In this article, the author describes integrated science and mathematics activities developed for fourth-grade students to explore and investigate three-dimensional geometric shapes, Bernoulli's principle, estimation, and art with and through bubbles. Students were engaged in thinking and reflection on the questions their teachers asked and were…

Reeder, Stacy

2007-01-01

464

Investigation of Inhalation Anthrax Case, United States  

PubMed Central

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

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

2014-01-01

465

Investigating University Students' Beliefs about Language Learning  

ERIC Educational Resources Information Center

The aim of the study is to investigate beliefs students usually held about language learning, based on the Beliefs About Language Learning Inventory (BALLI) questionnaire (Horwitz, 1988). For this purpose, 423 University learners of English in Iran were selected. Running descriptive statistics and the scree plot test, five factors were extracted:…

Mohebi, Sanaz Ghobadi; Khodadady, Ebrahim

2011-01-01

466

A Study of Investigating Child Abuse  

Microsoft Academic Search

Child abuse can take many forms. Such forms can include physical abuse, verbal abuse, sexual abuse, psychological abuse, neglect, and maltreatment. The child will almost always be questioned about the abuse. The way in which the police officers and the criminal justice system go about their investigation can affect the child. There are certain ways in which to question a

Bryan Cairnduff

2012-01-01

467

Investigating Adolescent Stress and Body Image  

ERIC Educational Resources Information Center

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

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

2011-01-01

468

Linguistic Investigations into Ellipsis in Classical Sanskrit  

NASA Astrophysics Data System (ADS)

Ellipsis is a common phenomenon of Classical Sanskrit prose. No inventory of the forms of ellipsis in Classical Sanskrit has been made. This paper presents an inventory, based both on a systematic investigation of one text and on examples based on sundry reading.

Gillon, Brendan S.

469

Teaching Adult Students Mathematical Investigation--2.  

ERIC Educational Resources Information Center

This paper is based on the on-going research work and teaching carried out in the Mathematics Foundations Course (MFC) at Goldsmiths College, University of London. It is argued that teaching adult students mathematical investigation has given insight into the way they learn mathematics better and removes the barriers of mathematics phobia. It…

Angiama, R. O.

470

Some Investigations on Lightning Protection for Buildings  

Microsoft Academic Search

A description is given of investigations conducted for a large manufacturer of explosives to determine upon a suitable system of lightning protection for buildings containing explosives. The work is divided into the following sections: (1) An analysis by oscillograph of the secondary currents induced by actual lightning discharges in vertical earthed conductors, the results seeming to indicate that such currents

L. A. De Blois

1914-01-01

471

INVESTIGATION Estimate of the Spontaneous Mutation Rate  

E-print Network

INVESTIGATION Estimate of the Spontaneous Mutation Rate in Chlamydomonas reinhardtii Rob W. Ness,1 of spontaneous mutations, including their rate, distribution across the genome, and fitness consequences, is of central importance to biology. However, the low rate of mutation has made it difficult to study

Keightley, Peter

472

INVESTIGATION A Resolution of the Mutation Load  

E-print Network

INVESTIGATION A Resolution of the Mutation Load Paradox in Humans Yann Lesecque,*,,1 Peter D ABSTRACT Current information on the rate of mutation and the fraction of sites in the genome that are subject to selection suggests that each human has received, on average, at least two new harmful mutations

Keightley, Peter

473

Investigation of At-Risk Patent Filings  

ERIC Educational Resources Information Center

The author presents an investigation of patent-application filings made without external financial support, or "at-risk", based on inventions disclosed to the University of California from fiscal years 1991 to 2000. The success of the at-risk patent applications filed on these invention disclosures is examined from the perspective of agreements…

Livne, O.

2003-01-01

474

Investigating Complexity Using Excel and Visual Basic.  

ERIC Educational Resources Information Center

Shows how some of the simple ideas in complexity can be investigated using a spreadsheet and a macro written in Visual Basic. Shows how the sandpile model of Bak, Chao, and Wiesenfeld can be simulated and animated. The model produces results that cannot easily be predicted from its properties. (Author/MM)

Zetie, K. P.

2001-01-01

475

An Empirical Investigation into Programming Language Syntax  

ERIC Educational Resources Information Center

Recent studies in the literature have shown that syntax remains a significant barrier to novice computer science students in the field. While this syntax barrier is known to exist, whether and how it varies across programming languages has not been carefully investigated. For this article, we conducted four empirical studies on programming…

Stefik, Andreas; Siebert, Susanna

2013-01-01

476

Investigating Diffusion of Molecules in Liquid  

NSDL National Science Digital Library

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

Jean Karschnia Valley Crossing Community School Woodbury, MN

477

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

478

Investigation of electrons interaction in a superconductor  

E-print Network

Investigating the interaction of electrons in a superconductor by means of a method of solitary waves of Korteweg - de Vries, we refute the claim of absence of "Cooper pairs" in a superconductor. We also indicate that the nondissipative transfer of energy in the superconductor is possible only with the help of a pair of electrons.

Iogann Tolbatov

2009-10-21

479

INVESTIGATION OF 'LEGIONELLA PNEUMOPHILA' IN DRINKING WATER  

EPA Science Inventory

An investigation of Legionella pneumophila in drinking water systems and home plumbing appurtenances was done. In Phase 1, 68 water samples were collected from kitchen sink faucets in homes on 17 community water systems. No. L. pneumophila organisms were isolated. In Phase 1A, th...

480

The Laboratory: A Place to Investigate.  

ERIC Educational Resources Information Center

This document on the undergraduate laboratory biology course is organized into 4 parts. Part 1 deals with the role of investigation in the undergraduate curricula. Chapters in this section deal with the time for laboratory reform; some special considerations in designing laboratory programs for nonmajors; the appropriate laboratory experiences for…

Thornton, John W., Ed.

481

21 CFR 812.25 - Investigational plan.  

Code of Federal Regulations, 2014 CFR

...scientifically sound. (c) Risk analysis. A description and analysis of all increased risks to which subjects will be exposed...the manner in which these risks will be minimized; a justification...investigation; and a description of the patient population, including the...

2014-04-01

482

21 CFR 812.25 - Investigational plan.  

Code of Federal Regulations, 2010 CFR

...scientifically sound. (c) Risk analysis. A description and analysis of all increased risks to which subjects will be exposed...the manner in which these risks will be minimized; a justification...investigation; and a description of the patient population, including the...

2010-04-01

483

21 CFR 812.25 - Investigational plan.  

Code of Federal Regulations, 2012 CFR

...scientifically sound. (c) Risk analysis. A description and analysis of all increased risks to which subjects will be exposed...the manner in which these risks will be minimized; a justification...investigation; and a description of the patient population, including the...

2012-04-01

484

21 CFR 812.25 - Investigational plan.  

Code of Federal Regulations, 2013 CFR

...scientifically sound. (c) Risk analysis. A description and analysis of all increased risks to which subjects will be exposed...the manner in which these risks will be minimized; a justification...investigation; and a description of the patient population, including the...

2013-04-01

485

21 CFR 812.25 - Investigational plan.  

Code of Federal Regulations, 2011 CFR

...scientifically sound. (c) Risk analysis. A description and analysis of all increased risks to which subjects will be exposed...the manner in which these risks will be minimized; a justification...investigation; and a description of the patient population, including the...

2011-04-01

486

ORIGINAL ARTICLE Investigation of archaeal and bacterial  

E-print Network

of the earlier studies of fermented food have focused on lactic acid bacteria (LAB) in the fermentation processORIGINAL ARTICLE Investigation of archaeal and bacterial diversity in fermented seafood using, Seoul, Republic of Korea Little is known about the archaeal diversity of fermented seafood; most

Bae, Jin-Woo

487

Structural and Therapeutic Investigations of Human Lipoxygenase  

E-print Network

the structural and kinetic properties of the enzyme.in the kinetic isotope effect (KIE) of both enzymes in akinetic and structural studies we investigated the role of the polycystin-1 lipoxygenase alpha-toxin (PLAT) domain’s role in enzyme

Hoobler, Eric Kerstan

2013-01-01

488

Investigating the Effectiveness of Classroom Diagnostic Tools  

ERIC Educational Resources Information Center

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

Schultz, Robert K.

2012-01-01

489

Jigsaw: supporting investigative analysis through interactive visualization  

Microsoft Academic Search

Investigative analysts who work with collections of text documents connect embedded threads of evidence in order to formulate hypotheses about plans and activities of potential interest. As the number of documents and the corre- sponding number of concepts and entities within the documents grow larger, sense-making processes become more and more difficult for the analysts. We have developed a visual

John T. Stasko; Carsten Görg; Zhicheng Liu

2008-01-01

490

Jigsaw: Supporting Investigative Analysis through Interactive Visualization  

Microsoft Academic Search

Investigative analysts who work with collections of text documents connect embedded threads of evidence in order to formulate hy- potheses about plans and activities of potential interest. As the number of documents and the corresponding number of concepts and entities within the documents grow larger, sense-making pro- cesses become more and more difcult for the analysts. We have developed a

John T. Stasko; Carsten Görg; Zhicheng Liu; Kanupriya Singhal

2007-01-01

491

Investigating Ceiling Effects in Longitudinal Data Analysis  

ERIC Educational Resources Information Center

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

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

2008-01-01

492

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

493

A serious game for traffic accident investigators  

Microsoft Academic Search

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 learning environment,

Ahmed Binsubaih; Steve Maddock; Daniela Romano

2006-01-01

494

An Investigation of Different String Coding Methods.  

ERIC Educational Resources Information Center

Investigates techniques for automatic coding of English language strings which involve titles drawn from bibliographic files, but do not require prior knowledge of source. Coding methods (basic, maximum entropy principle), results of test using 6,260 titles from British National Bibliography, and variations in code element ordering are…

Goyal, Pankaj

1984-01-01

495

Investigation of an air separation unit explosion  

Microsoft Academic Search

This paper describes the investigation of the cause of a serious explosion in an air separation unit in Bintulu (Malaysia) on 25 December 1997. Since the cause of the explosion was not obvious, a large number of possible scenarios was generated, followed by a systematic process of elimination. Ultimately, conclusive evidence was obtained that combustible airborne particulates had passed the

R. M. van Hardeveld; M. J. Groeneveld; J.-Y. Lehman; D. C. Bull

2001-01-01

496

Biochemical investigations of retinotectal adhesive specificity  

Microsoft Academic Search

The preferential adhesion of chick neural retina cells to surfaces of intact optic tecta has been investigated biochemically. The study uses a collection assay in which single cells from either dorsal or ventral halves of neural retina adhere preferentially to ventral or dorsal halves of optic tecta, respectively. The data presented support the following conclusions: (a) The adhesion of ventral

RICHARD B. MARCHASE

1977-01-01

497

MATERIAL TRANSFER FORM A. Principal Investigator  

E-print Network

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

Ollivier-Gooch, Carl

498

INVESTIGATION A General Mechanistic Model for Admixture  

E-print Network

source population are constant over time, the long-term limit of the expectation of the admixture human populations have been employed in assess- ing patterns of migration and genetic structure (ParraINVESTIGATION A General Mechanistic Model for Admixture Histories of Hybrid Populations Paul Verdu1

Rosenberg, Noah

499

Lessons from London Schools: Investigating the Success  

ERIC Educational Resources Information Center

This research seeks to investigate the claim that London schools have improved dramatically since 2000. The authors have reviewed the evidence of transformational change and explored possible reasons for the development in London's schools. The project was guided by three questions: (1) Is the success of London's schools as real as has…

Baars, Sam; Bernardes, Eleanor; Elwick, Alex; Malortie, Abigail; McAleavy, Tony; McInerney, Laura; Menzies, Loic; Riggall, Anna

2014-01-01

500

Investigating Instructional Leadership for Special Education  

Microsoft Academic Search

Instructional leadership has been studied since the inception of public education in the United States, but few studies have addressed the supervisory practices used to ensure that students who have disabilities receive an appropriate public education. We used grounded theory methods to investigate how instructional leadership for special education occurs in elementary schools. Our analysis produced detailed descriptions of the

Debora A. Bays; Jean B. Crockett

2007-01-01