These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

PWR blowdown heat transfer separate-effects program data evaluation report. THTF test series II  

Microsoft Academic Search

Thermal-hydraulic phenomena are analyzed for test series II conducted at the Thermal-Hydraulic Test Facility (THTF) as part of the Pressurized-Water Reactor Blowdown Heat Transfer Separate-Effects Program at Oak Ridge National Laboratory. A discussion of the effects of test section outlet fluid subcooling, bundle power, and inactive rods on thermal-hydraulic behavior in the THTF is presented. A mechanism that may be

C. B. Mullins; C. R. Hyman; W. G. Craddick; T. M. Anklam; R. A. Hedrick

1979-01-01

2

Extending the Alternating Series Test  

ERIC Educational Resources Information Center

Alternating series have the simplest of sign patterns. What about series with more complicated patterns? By inspecting the alternating series test closely, we find a theorem that applies to more complicated sign patterns, and beyond.

Katsuura, Hidefumi

2012-01-01

3

PWR Blowdown Heat Transfer Separate-Effects Program data evaluation report: heat transfer for THTF test series 100  

Microsoft Academic Search

Heat transfer phenomena are analyzed for test series 100 of the Thermal-Hydraulic Test Facility, part of the Pressurized-Water Reactor Blowdown Heat Transfer Separate-Effects Program. Heater rod surface temperatures are found to be sensitive to relatively small variations in flow. The mechanisms causing departure from nucleate boiling and rewetting are analyzed. Comparisons are made between heater rod surface temperatures calculated from

W. G. Craddick; C. R. Hyman; R. A. Hedrick; C. B. Mullins; K. G. Turnage

1978-01-01

4

SERIES-X test results  

NASA Astrophysics Data System (ADS)

The SERIES-X project which demonstrates the feasibility of a method involving measurements of the distance from the TOPEX earth satellite and various points on the ground to Global Positioning System (GPS) satellites is described. The features of SERIES-X are compared with three better-known geodetic-quality GPS systems (Geostar, Macrometer, and SERIES). It is shown that the system is capable of measuring the positions of isolated stations, but its accuracy is improved when it measures baselines. Test results of some measurements of baselines ranging in length from 15 to 171,000 m are presented and discussed.

Crow, R. B.; Bletzacker, F. R.; Najarian, R. J.; Purcell, G. H., Jr.; Statman, J. I.; Thomas, J. B.

5

J series thruster thermal test results  

NASA Technical Reports Server (NTRS)

Test experience with J series ion thrusters have indicated that the present thruster design may result in excessive temperatures in areas which utilize organic materials such as wire insulation, with the resultant outgassing and potential contamination of insulating materials. Further, it appears that thermal data obtained with earlier thruster designs, such as the 700 series thruster, may not be directly applicable to the J series design. Two J series thrusters were fitted with thermocouples and critical temperatures measured for a variety of configurations and operating parameters. Completely enclosing the thruster to reduce facility contamination significantly increased temperatures prompting the selection of a compromise geometry for life testing. The operating parameter having the largest effect on temperatures was discharge power, while beam power affected little else than extraction system temperatures. Several off-normal operating modes were also investigated. Data believed to be sufficient to effectively modify existing thermal models were obtained from the tests.

Bechtel, R. T.; Dulgeroff, C. R.

1982-01-01

6

PWR blowdown heat transfer separate-effects program data evaluation report: system response for thermal-hydraulic test facility test series 100  

Microsoft Academic Search

Selected reduced instrument responses and analyses of the indicated phenomena are presented for Thermal-Hydraulic Test Facility (THTF) test series 100, which is part of the PWR Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomena that govern the energy transfer and transport processes occurring during a postulated loss-of-coolant accident in a pressurized-water reactor

R. A. Hedrick; W. G. Craddick; K. G. Turnage; C. R. Hyman

1977-01-01

7

Effective Strategies for Dealing with Test Anxiety. Teacher to Teacher Series.  

ERIC Educational Resources Information Center

Test anxiety is exceedingly common among learners in adult basic education. Any one or more of the following can cause individuals to experience test anxiety: learned behavior resulting from the expectations of parents, teachers, or significant others; associations that students have built between grades or test performance and personal worth;…

Collins, Lisa

8

Single-event Effect Report for EPC Series eGaN FETs: Proton Testing for SEE and TNID Effects  

NASA Technical Reports Server (NTRS)

Previous testing of the Enhanced Power Conversion (EPC) eGaN FETs showed sensitivity to destructive single-event effects (SEE) effects to heavy ions. The presence of tungsten plugs in the gate area raises concerns that the device may be vulnerable to SEE from protons. Irradiation of biased and unbiased devices with heavy ion has results in some damage suspected of being due to total non-ionizing dose (TNID). Proton irradiation is a better radiation type to study this effect. This study presents the results of testing device with protons for SEE and TNID. No SEE in the EPC2012 device, the most sensitive device to SEE, were seen with 53 MeV protons at several angles. The devices continued to function after 1.5 Mrad (Si) of proton dose with only a slight shift in parameters. These results suggest that gross TNID will not be a factor in using these devices nor suffer from SEE due to protons. However, the device should be tested at with 500 MeV protons to guarantee to immunity proton SEE.

Scheick, Leif

2014-01-01

9

Test for series-connected circuit breakers  

Microsoft Academic Search

Series-rated circuit breakers are commonplace, but not always well understood. This paper provides basic information on how a series rating is tested and relates that information to the interaction of the overcurrent protective devices involved. The paper also explores the question of whether calculations can be used to determine the series rating of an untested combination.

George D. Gregory; Wayne Stoppelmoor

2003-01-01

10

Understanding Cancer Series: Gene Testing  

Cancer.gov

Lydia Schindler Donna Kerrigan, M.S. Jeanne Kelly Brian Hollen Illustrates what genes are, explains how mutations occur and are identified within genes, and discusses the benefits and limitations of gene testing for cancer and other disorders. These PowerPoint slides are not locked files. You can mix and match slides from different tutorials as you prepare your own lectures. In the Notes section, you will find explanations of the graphics.

11

Technical Manual: 2002 Series GED Tests  

ERIC Educational Resources Information Center

This manual was written to provide technical information regarding the 2002 Series GED (General Educational Development) Tests. Throughout this manual, documentation is provided regarding the development of the GED Tests, data collection activities, as well as reliability and validity evidence. The purpose of this manual is to provide evidence…

Ezzelle, Carol; Setzer, J. Carl

2009-01-01

12

The NASA B-757 HIRF Test Series: Flight Test Results  

NASA Technical Reports Server (NTRS)

In 1995, the NASA Langley Research Center conducted a series of aircraft tests aimed at characterizing the electromagnetic environment (EME) in and around a Boeing 757 airliner. Measurements were made of the electromagnetic energy coupled into the aircraft and the signals induced on select structures as the aircraft was flown past known RF transmitters. These measurements were conducted to provide data for the validation of computational techniques for the assessment of electromagnetic effects in commercial transport aircraft. This paper reports on the results of flight tests using RF radiators in the HF, VHF, and UHF ranges and on efforts to use computational and analytical techniques to predict RF field levels inside the airliner at these frequencies.

Moeller, Karl J.; Dudley, Kenneth L.

1997-01-01

13

PBF-LOCA Test Series: Test LOC-5 experiment predictions  

Microsoft Academic Search

The Loss of Coolant Accident (LOCA) Test Series being conducted in the Power Burst Facility (PBF) at the Idaho National Engineering Laboratory has been designed to provide data for the development and the assessment of fuel behavior computer codes used to predict the response of a pressurized light water reactor (PWR) during a hypothetical break in the cold-leg inlet or

M. E. Waterman; T. R. Yackle

1979-01-01

14

Testing the Effectiveness of an Intervention Model Based on Data Use: A Replication Series across Clusters of Schools  

ERIC Educational Resources Information Center

Intervention models based on data use can be effective in raising student achievement. This article presents 3 studies of one such model which had reported improved reading comprehension levels in 7 poor urban multicultural schools serving indigenous and ethnic minority communities. The intervention (the Learning Schools Model) used a process…

McNaughton, Stuart; Lai, Mei Kuin; Hsiao, Selena

2012-01-01

15

Photopatch testing: recommendations for a European photopatch test baseline series.  

PubMed

In order to establish a consensus recommendation for performing photopatch testing, a photopatch test taskforce group was established under the joint umbrella of the European Society for Contact Dermatitis and the European Society for Photodermatology in 2000. After proposing the most adequate methodology in 2004 and completing a European multicentre photopatch test study in 2011, this taskforce is recommending a list of photoallergens that should form part of a baseline series for photopatch testing in Europe. It contains mainly ultraviolet filters and drugs, mostly non-steroidal anti-inflammatory drugs. The choice of chemicals was based on the results of a recent multicentre study, previous published cases of photoallergy, and use of the substances in the European market. It is suggested that an extended list of photoallergens should be photopatch tested in selected cases, along with patients' own products. Two contact allergens, cinnamyl alcohol and decyl glucoside, should be simultaneously patch tested in order to clarify photopatch and patch test reactions, respectively, to ketoprofen and methylene bis-benzotriazolyl tetramethylbutylphenol (Tinosorb M™). PMID:23510344

Gonçalo, Margarida; Ferguson, James; Bonevalle, Annie; Bruynzeel, Derk P; Giménez-Arnau, Ana; Goossens, An; Kerr, Alastair; Lecha, Mario; Neumann, Norbert; Niklasson, Bo; Pigatto, Paolo; Rhodes, Lesley E; Rustemeyer, Thomas; Sarkany, Robert; Thomas, Pierre; Wilkinson, Mark

2013-04-01

16

Fluid flow measurements of Test Series A and B for the Small Scale Seal Performance Tests  

SciTech Connect

The degree of waste isolation achieved by a repository seal system is dependent upon the fluid flow characteristics, or permeability, of the seals. In order to obtain meaningful, site-specific data on the performance of various possible seal system components, a series of in situ experiments called the Small Scale Seal Performance Tests (SSSPT) are being conducted at the Waste Isolation Pilot Plant (WIPP). This report contains the results of gas flow, tracer penetration, and brine flow tests conducted on concrete seals in vertical (Test Series A) and horizontal (Test Series B) configurations. The test objectives were to evaluate the seal performance and to determine if there existed scaling effects which could influence future SSSPT designs. 3 refs., 77 figs.

Peterson, E.W.; Lagus, P.L.; Lie, K.

1987-12-01

17

Space shuttle orbiter test flight series  

NASA Technical Reports Server (NTRS)

The proposed studies on the space shuttle orbiter test taxi runs and captive flight tests were set forth. The orbiter test flights, the approach and landing tests (ALT), and the ground vibration tests were cited. Free flight plans, the space shuttle ALT crews, and 747 carrier aircraft crew were considered.

Garrett, D.; Gordon, R.; Jackson, R. B.

1977-01-01

18

A comparison of tests for positive term series  

E-print Network

: the Ratio test [3], D'Alembert's Root test [1], Cauchy's Integral test [3], Cauchy's Condensation test [2], Raabe's test [I], Gauss's test [6], the Comparison test [2], and Kummer's test [4]. These tests all examine the convergence or divergence... of the ~Pdt lthltNth tt 1~$tt CHAPTER II THE COMPARISON OF TESTS A List of Tests In this chapter we compare tests for convergence of positive term series. The table, following the listing of the tests, is included as a quick reference to the relative...

Krohn, Stuart Anthony

2012-06-07

19

Series and parallel arc-fault circuit interrupter tests.  

SciTech Connect

While the 2011 National Electrical Code%C2%AE (NEC) only requires series arc-fault protection, some arc-fault circuit interrupter (AFCI) manufacturers are designing products to detect and mitigate both series and parallel arc-faults. Sandia National Laboratories (SNL) has extensively investigated the electrical differences of series and parallel arc-faults and has offered possible classification and mitigation solutions. As part of this effort, Sandia National Laboratories has collaborated with MidNite Solar to create and test a 24-string combiner box with an AFCI which detects, differentiates, and de-energizes series and parallel arc-faults. In the case of the MidNite AFCI prototype, series arc-faults are mitigated by opening the PV strings, whereas parallel arc-faults are mitigated by shorting the array. A range of different experimental series and parallel arc-fault tests with the MidNite combiner box were performed at the Distributed Energy Technologies Laboratory (DETL) at SNL in Albuquerque, NM. In all the tests, the prototype de-energized the arc-faults in the time period required by the arc-fault circuit interrupt testing standard, UL 1699B. The experimental tests confirm series and parallel arc-faults can be successfully mitigated with a combiner box-integrated solution.

Johnson, Jay; Fresquez, Armando J.; Gudgel, Bob [MidNite Solar, Arlington, WA; Meares, Andrew [MidNite Solar, Arlington, WA

2013-07-01

20

Mighty Eagle 'Rocks' Flight Testing Series - Duration: 2:00.  

NASA Video Gallery

The "Mighty Eagle," a NASA robotic prototype lander, recently completed a series of test objectives â?? even going as high as 100 feet for several free flights. The vehicle is a three-legged protot...

21

Ecotoxicological test systems proceedings of a series of workshops  

SciTech Connect

A series of six workshops was conducted by the Environmental Sciences Division, Oak Ridge National Laboratory, to identify laboratory methods and data evaluation techniques for predicting the environmental effects of chemical substances. Methods were evaluated for their potential for standardization and for use in the ecological hazard and risk assessment processes under the Toxic Substances Control Act. The workshops addressed assessment and policy requirements of multispecies toxicology test procedures, mathematical models useful in hazard and risk assessments, and methods for measuring effects of chemicals on terrestrial and aquatic population interactions and ecosystem properties. The workshops were primarily used as a mechanism to gather information about research in progress. This information was part of the data base used to prepare a critical review of laboratory methods for ecological toxicology.

Hammons, A.S. (ed.)

1981-06-01

22

Growth hormone stimulation test - series (image)  

MedlinePLUS

The growth hormone (GH) is a protein hormone released from the anterior pituitary gland under the control of the hypothalamus. In children, GH has growth-promoting effects on the body. It stimulates the ...

23

Testing the effectiveness of mobile home weatherization measures in a controlled environment: The SERI CMFERT (Collaborative Manufactured Buildings Facility for Energy Research and Training) Project  

Microsoft Academic Search

For several years the Solar Energy Research Institute has been testing the effectiveness of mobile home weatherization measures, with the support of the US DOE Office of State and Local Assistance Programs Weatherization Assistance Program, the DOE Office of Buildings and Community Systems, the seven states within the federal Weatherization Region 7, the Colorado Division of Housing, and the DOE

R. D. Judkoff; C. E. Hancock; E. Franconi

1990-01-01

24

Iranian rainfall series analysis by means of nonparametric tests  

NASA Astrophysics Data System (ADS)

The study of the trends and fluctuations in rainfall has received a great deal of attention, since changes in rainfall patterns may lead to floods or droughts. The objective of this study was to analyze the annual, seasonal, and monthly rainfall time series at seven rain gauge stations in the west of Iran for a 40-year period (from October 1969 to September 2009). The homogeneity of the rainfall data sets at the rain gauge stations was checked by using the cumulative deviations test. Three nonparametric tests, namely Kendall, Spearman, and Mann-Kendall, at the 95 % confidence level were used for the trend analysis and the Theil-Sen estimator was applied for determining the magnitudes of the trends. According to the homogeneity analysis, all of the rainfall series except the September series at Vasaj station were found to be homogeneous. The obtained results showed an insignificant trend in the annual and seasonal rainfall series at the majority of the considered stations. Moreover, only three significant trends were observed at the February rainfall of Aghajanbolaghi station, the November series of Vasaj station, and the March rainfall series of Khomigan station. The findings of this study on the temporal trends of rainfall can be implemented to improve the water resources strategies in the study region.

Talaee, P. Hosseinzadeh

2014-05-01

25

Testing the effectiveness of mobile home weatherization measures in a controlled environment: The SERI CMFERT (Collaborative Manufactured Buildings Facility for Energy Research and Training) Project  

SciTech Connect

For several years the Solar Energy Research Institute has been testing the effectiveness of mobile home weatherization measures, with the support of the US DOE Office of State and Local Assistance Programs Weatherization Assistance Program, the DOE Office of Buildings and Community Systems, the seven states within the federal Weatherization Region 7, the Colorado Division of Housing, and the DOE Denver Support Office. During the winter of 1988--89, several weatherization measures were thermally tested on three mobile homes under controlled conditions inside a large environmental enclosure. The effects of each weatherization measure on conduction losses, infiltration losses, and combined furnace and duct-delivered heat efficiency were monitored. The retrofit options included air sealing, duct repair, furnace tune-up, interior storm panels, floor insulation, and roof insulation. The study demonstrated that cost-effective heating energy savings of about 20% to 50% are possible if weatherization techniques adapted to the special construction details in mobile homes are applied. 24 refs., 18 figs., 9 tabs.

Judkoff, R.D.; Hancock, C.E.; Franconi, E.

1990-03-01

26

Using Textbooks Effectively. TESOL Classroom Practice Series  

ERIC Educational Resources Information Center

This volume in the TESOL Classroom Practice Series asks one fundamental question, "How can teachers teach the students, not the book?" The response, given within "Using Textbooks Effectively", is to move beyond the textbook as a separate entity and view it instead as part of the ESOL curriculum process and as a tool for student learning. The…

Savova, Lilia, Ed.

2009-01-01

27

Science Library of Test Items. Volume Eleven. Mastery Testing Programme. [Mastery Tests Series 3.] Tests M27-M38.  

ERIC Educational Resources Information Center

As part of a series of tests to measure mastery of specific skills in the natural sciences, copies of tests 27 through 38 include: (27) reading a grid plan; (28) identifying common invertebrates; (29) characteristics of invertebrates; (30) identifying elements; (31) using scientific notation part I; (32) classifying minerals; (33) predicting the…

New South Wales Dept. of Education, Sydney (Australia).

28

Test Series 4: seismic-fragility tests of naturally-aged Exide EMP13 battery cells  

Microsoft Academic Search

This report, the fourth in a test series of an extensive seismic research program, covers the testing of a 27-year old lead-antimony Exide EMP-13 cells from the recently decommissioned Shippingport Atomic Power Station. The Exide cells were tested in two configurations using a triaxial shake table: single-cell tests, rigidly mounted; and multicell (five-cell) tests, mounted in a typical battery rack.

L. L. Bonzon; D. B. Hente; B. M. Kukreti; J. Schendel; J. D. Tulk; W. J. Janis; D. A. Black; G. D. Paulsen; B. D. Aucoin

1985-01-01

29

Materials Evaluation Test Series (METS) 04, 05, and 06  

SciTech Connect

The purpose of this work is to examine the environmental, safety, health and operational aspects of detonating a confined explosive test apparatus that has been designed to maximize the dynamics of impact on beryllium metal components for Contained Firing Facility (CFF) applications. A combination of experimental collection and evaluation methods were designed and implemented to provide an evaluation of immediately postdetonation by-products reflecting a potential worst-case scenario beryllium aerosolization explosive event. The collective Material Evaluation Test Series (METS) 04 - 06 provided explosive devices designed to scale for the dedicated METS firing tank that would provide a post-detonation internal environment comparable to the CFF. The experimental results provided appropriate information to develop operational parameters to be considered for conducting full-scale beryllium-containing experimental tests with similar designs within CFF and B801A. These operational procedures include the inclusion of chelating agents in pre-shot CFF cardboard containers with a minimum of 600 gallons content, an extended time period post-test before purging the CFF chamber, and an adaptation of approaches toward applications of the scrubber and HEPA systems during the post-shot sequence for an integrated environmental, safety, and health approach. In addition, re-entry and film retrieval procedures will be adapted, in line with abatement techniques for cleaning the chamber, that will be required for work inside a CFF that will contain an elevated concentration of spherical and highly aerosolizable beryllium particulate.

Zalk, D; Ingram, C; Simmons, L; Arganbright, R; Lyle, J; Wong, K

2006-03-23

30

[Patch testing with the "Austrian standard series"--epidemiologic test values and results].  

PubMed

Patch testing for contact allergies is routinely performed by applying a "standard series" of the most frequently occurring contact allergens. Internationally "established" standard series have to be adapted to country- and population-specific factors (i.e., distribution of gender and age, occupational behavior, environmental factors etc.). In 1992 and 1993 altogether 11,690 patients were patch tested in 14 Austrian test centers with the "Austrian standard patch test series" as recommended by the working group "Contact Allergy" of the Austrian Society of Dermatology. Altogether data on 11,544 patients were complete and are analyzed in this study. 71.5% of the test population were female with an average age of 39 years, whereas the male patients had an average age of 40 years. 38.1% of the patients were younger than 30 years, 47.8% were in the group ranging from 31 to 60 years and 14% of the tested patients were older than 60 years. Cutaneous sensitization was found in 51% of the people tested with the "Austrian standard series". This proportion varied between 40.8 and 61.4% from center to center (with more than 100 tested persons). 15 (60%) of the 25 test substances in 1992 and 17 (68%) in 1993 surpassed the limit of a sensitization frequency of 1%. The "hit list" of substances did not differ qualitatively from those of other international studies, with only one remarkable, well described "Austrian-specific" exception, namely the mercury-containing thiomersal (second place).(ABSTRACT TRUNCATED AT 250 WORDS) PMID:7610657

Kränke, B; Binder, M; Derhaschnig, J; Komericki, P; Pirkhammer, D; Ziegler, V; Aberer, W

1995-01-01

31

FIELD DISPERSANT EFFECTIVENESS TEST  

EPA Science Inventory

The EPA's OHMSETT facility has developed a rapid field test that includes some of the theoretical aspects and conditions of dispersion at sea. This Field Dispersant Effectiveness Test (FDET) has been used to evaluate the dispersibility of various commonly-transported oils and mak...

32

Progress report on LLTR Series II Test A-2 (Part 1). [LMFBR  

SciTech Connect

This document contains a complete set of valid and final digital and analog data plots for LLTR Series II, Test A-2. Included is an Accuracy Statement regarding this data as required by Revision 0 of the GE Test Request, Specification No. 23A2062. The Series II, Sodium-Water Reaction Test A-2 was performed in the Large Leak Test Rig (LLTR) at the Energy Technology Engineering Center (ETEC). This was the third of three planned double-edged guillotine (DEG) rupture tests of a single tube which will be followed by a number of small leak tests. The test article is the LLTI which is a full-size diameter internals, shortened in length and prototypic of the CRBR steam generator. It is installed in the Large Leak Test Vessel (LLTV). The overall test program was formulated by General Electric (GE) as Test Requester to establish steam generator design and to verify analytical models/codes to estimate the effect of large leak accidents in an LMFBR demonstration plant steam generator and system.

Freede, W.J.; Neely, H.H.

1980-01-01

33

Curriculum-Referenced Test Development Workshop Series: Workshops One through Three.  

ERIC Educational Resources Information Center

This set of materials represents the first three workshops in a series of five designed to assist school districts and educators to develop their own curriculum-referenced tests. The series has been assembled to provide school districts with a relatively inexpensive test development method. The series is designed to reduce costs by pooling…

Arter, Judith A.

34

Thermal-hydraulic analysis of semiscale Mod1 integral blowdown-reflood tests (baseline ECC test series)  

Microsoft Academic Search

Selected experiment data from tests performed during the Semiscale Mod-1 baseline emergency core cooling test series (Series 4) are analyzed. The analysis is confined primarily to data that have been analyzed with respect to the significant phenomena that occur in the Mod-1 system during the blowdown, refill, and reflood phases of an integral blowdown-reflood test. Analyses concerned with the blowdown

Cozzuol

1977-01-01

35

PX series AMTEC cell design, testing and analysis  

SciTech Connect

PX (Pluto Express) cell testing and analysis has shown that AMTEC (Alkali Metal Thermal to Electric Conversion) cells can reach the power levels required by proposed RPS (Radioisotope Power Supply) system designs. A major PX cell design challenge was to optimize the power and efficiency of the cell while allowing a broad operational power range. These design optimization issues are greatly dependent on the placement of the evaporation zone. Before the PX-2 and PX-4 cells were built, the results from the PX-1, ATC-2 (artery test cell) and design analysis indicated the need for a thermal bridge between the heat input surface of the cell and the structure supporting the evaporation zone. Test and analytic results are presented illustrating the magnitude of the power transfer to the evaporation zone and the effect of this power transfer on the performance of the cell. Comparisons are also made between the cell test data and analytic results of cell performance to validate the analytic models.

Borkowski, C.A.; Sievers, R.K.; Hendricks, T.J. [Advanced Modular Power Systems, Inc., Ann Arbor, MI (United States)

1997-12-31

36

CLINICAL EVALUATION OF PATIENTS PATCH TESTED WITH PLANT SERIES: A PROSPECTIVE STUDY  

PubMed Central

Background: Plants are ubiquitous in nature and are essential for human life, though some do have detrimental effects. In India, there are various indigenous and foreign plants that are well known to cause dermatitis, Parthenium hysterophorus being the foremost. Aims of the Study: To study the clinical features of patients presenting with plant dermatitis and evaluate plant allergen series patch test results. Materials and Methods: 50 patients with suspected plant dermatitis were evaluated regarding evolution of dermatitis, precipitating factors and contact with various plants. 31 patients (62%) complained of photo sensitivity and 24 (48%) had involvement of sun-exposed areas. Our provisional diagnoses included allergic contact dermatitis in 16, air borne contact dermatitis in 9, phytophotodermatitis in 7, photodermatitis in 6, airborne contact dermatitis to other causes in 4, phytodermatitis in 3. Patients were patch tested with Indian standard series of allergens as well as plant allergen series consisting of common allergenic plants of local flora in and around Manipal and also with plants strongly suspected by the patient. 35 tested positive with maximum positives (26 patients, i.e., 52%) to Parthenium hysterophorus (Compositae). Results: The result of patch testing was correlated with the history and clinical examination and relevance established. Conclusions: Majority of the patients with clinically suspected plant dermatitis belonged to 3rd or 4th decade and Parthenium was the leading plant allergen Sensitization to Leguminosae plants and Hopea ponga, seen in 9 cases, have not been reported earlier in literature. PMID:21965844

Davis, Suraj V; Shenoi, S D; Prabhu, S; Shirwaiker, A; Balachandran, C

2011-01-01

37

Relay test program. Series 2 tests: Integral testing of relays and circuit breakers  

SciTech Connect

This report presents the results of a relay test program conducted by Brookhaven National Laboratory (BNL) under the sponsorship of the US Nuclear Regulatory Commission (NRC). The program is a continuation of an earlier test program the results of which were published in NUREG/CR-4867. The current program was carried out in two phases: electrical testing and vibration testing. The objective was primarily to focus on the electrical discontinuity or continuity of relays and circuit breaker tripping mechanisms subjected to electrical pulses and vibration loads. The electrical testing was conducted by KEMA-Powertest Company and the vibration testing was performed at Wyle Laboratories, Huntsville, Alabama. This report discusses the test procedures, presents the test data, includes an analysis of the data and provides recommendations regarding reliable relay testing.

Bandyopadhyay, K.K.; Kunkel, C.; Shteyngart, S. [Brookhaven National Lab., Upton, NY (United States)

1994-02-01

38

The Facilities Committee. AGB Effective Committee Series  

ERIC Educational Resources Information Center

This publication is part of an Association of Governing Boards of Universities and Colleges (AGB) series devoted to strengthening the role of key standing committees of governing boards. While there is no optimum committee system for institutions of higher education, certain principles, practices, and procedures prevail. The best practices…

Kaiser, Harvey H.

2012-01-01

39

Test Series 4: seismic-fragility tests of naturally-aged Exide EMP-13 battery cells  

SciTech Connect

This report, the fourth in a test series of an extensive seismic research program, covers the testing of a 27-year old lead-antimony Exide EMP-13 cells from the recently decommissioned Shippingport Atomic Power Station. The Exide cells were tested in two configurations using a triaxial shake table: single-cell tests, rigidly mounted; and multicell (five-cell) tests, mounted in a typical battery rack. A total of nine electrically active cells was used in the two different cell configurations. None of the nine cells failed during the actual seismic tests when a range of ZPAs up to 1.5 g was imposed. Subsequent discharge capacity tests of five of the cells showed, however, that none of the cells could deliver the accepted standard of 80% of their rated electrical capacity for 3 hours. In fact, none of the 5 cells could deliver more than a 33% capacity. Two of the seismically tested cells and one untested, low capacity cell were disassembled for examination and metallurgical analyses. The inspection showed the cells to be in poor condition. The negative plates in the vicinity of the bus connections were extremely weak, the positive buses were corroded and brittle, negative and positive active material utilization was extremely uneven, and corrosion products littered the cells.

Bonzon, L.L.; Hente, D.B.; Kukreti, B.M.; Schendel, J.; Tulk, J.D.; Janis, W.J.; Black, D.A.; Paulsen, G.D.; Aucoin, B.D.

1985-03-01

40

Series  

Microsoft Academic Search

Mining time series data is an important approach for the analysis in many application areas as diverse as biology, environmental research, medicine, or stock chart analysis. As nearly all data mining tasks on this kind of data depend on a distance function between two time series, a huge number of such functions has been developed during the last decades. The

Hans-Peter Kriegel; Peer Kroger; Peter Kunath; Alexey Pryakhin; Matthias Renz

41

General-purpose heat source development: Extended series test program SRB fragment/fuselage tests  

NASA Astrophysics Data System (ADS)

General-Purpose Heat Source radioisotope thermoelectric generators (GPHS-RTGs) will provide electrical power for the NASA Galileo and European Space Agency (ESA) Ulysses missions. Each GPHS-RTG comprises two major components: GPHS modules, which provide thermal energy, and a thermoelectric converter, which converts the thermal energy into electrical power. Each of the 18 GPHS modules in a GPHS-RTG contains four Pu-238O2-fueled capsules. LANL conducted a series of safety verification tests on the GPHS-RTG before the scheduled May 1986 launch of the Galileo spacecraft to assess the ability of the GPHS modules to contain plutonia in potential accident environments. As a result of the Challenger 51-L accident in January 1986, NASA postponed the launch of Galileo; the spacecraft launch vehicle was reconfigured and the spacecraft trajectory modified. These actions prompted NASA to reevaluate potential mission accidents and the extended series safety test program was initiated. This program included a series of solid rocket booster (SRB) fragment/fuselage tests that simulated the interaction of SRB fragments generated in an SRB motor case rupture (or resulting from a range safety officer SRB destruct action) with sections of the Shuttle Orbiter. The test data helped verify and refine the analytical models of the SRB fragment/fuselage interaction. The results showed that the fragment velocity decreased significantly (up to 40 percent) after penetrating the Orbiter section(s). The interactions also reduced, and in some cases eliminated, the original fragment rotational rate and direction and initiated rotation in other directions.

Cull, Theresa A.

1989-06-01

42

General-purpose heat source development: Extended series test program SRB fragment/fuselage tests  

SciTech Connect

General-Purpose Heat Source radioisotope thermoelectric generators (GPHS-RTGs) will provide electrical power for the NASA Galileo and European Space Agency (ESA) Ulysses missions. Each GPHS-RTG comprises two major components: GPHS modules, which provide thermal energy, and a thermoelectric converter, which converts the thermal energy into electrical power. Each of the 18 GPHS modules in a GPHS-RTG contains four /sup 238/PuO/sub 2/-fueled capsules. LANL conducted a series of safety verification tests on the GPHS-RTG before the scheduled May 1986 launch of the Galileo spacecraft to assess the ability of the GPHS modules to contain plutonia in potential accident environments. As a result of the Challenger 51-L accident in January 1986, NASA postponed the launch of Galileo; the spacecraft launch vehicle was reconfigured and the spacecraft trajectory modified. These actions prompted NASA to reevaluate potential mission accidents and the extended series safety test program was initiated. This program included a series of solid rocket booster (SRB) fragment/fuselage tests that simulated the interaction of SRB fragments generated in an SRB motor case rupture (or resulting from a range safety officer SRB destruct action) with sections of the Shuttle Orbiter. The test data helped verify and refine the analytical models of the SRB fragment/fuselage interaction. The results showed that the fragment velocity decreased significantly (up to 40%) after penetrating the Orbiter section(s). The interactions also reduced, and in some cases eliminated, the original fragment rotational rate and direction and initiated rotation in other directions. 5 refs., 11 figs., 2 tabs.

Cull, T.A.

1989-06-01

43

General-Purpose Heat Source development: Extended series test program large fragment tests  

SciTech Connect

General-Purpose Heat Source radioisotope thermoelectric generators (GPHS-RTGs) will provide electric power for the NASA Galileo and European Space Agency Ulysses missions. Each GPHS-RTG comprises two major components: GPHS modules, which provide thermal energy, and a thermoelectric converter, which converts the thermal energy into electric power. Each of the 18 GPHS modules in a GPHS-RTG contains four /sup 238/PuO/sub 2/-fueled capsules. LANL conducted a series of safety verification tests on the GPHS-RTG before the scheduled May 1986 launch of the Galileo spacecraft to assess the ability of the GPHS modules to contain the plutonia in potential accident environments. As a result of the Challenger 51-L accident in January 1986, NASA postponed the launch of Galileo; the launch vehicle was reconfigured and the spacecraft trajectory was modified. These actions prompted NASA to reevaluate potential mission accidents, and an extended series safety test program was initiated. The program included a series of large fragment tests that simulated the collision of solid rocket booster (SRB) fragments, generated in an SRB motor case rupture or resulting from a range safety officer SRB destruct action, with the GPHS-RTG. The tests indicated that fueled clads, inside a converter, will not breach or release fuel after a square (142 cm on a side) SRB fragment impacts flat-on at velocities up to 212 m/s, and that only the leading fueled capsules breach and release fuel after the square SRB fragment impacts the modules, inside the converter, edge-on at 95 m/s. 8 refs., 32 figs., 7 tabs.

Cull, T.A.

1989-08-01

44

Misuse Study of Latch Attachment: A Series of Frontal Sled Tests  

PubMed Central

This study was initiated to quantify the effects of the misuse in LATCH lower webbing. In the short period since the implementation of the LATCH system several cases of potential misuses have been reported. A series of sled tests in frontal impact mode were conducted with various misuse conditions (loose attachment of LATCH lower webbing, misrouting of LATCH lower webbing and child seat back inclination) for both forward and rearward facing child safety seats (FFCSS and RFCSS). Results from these tests are compared and discussed with that of the standard test with no misuse and showed that as the slack in the lower LATCH webbing increased, ATD injury measures exceeded the limits. The FFCSS tests in the reclined condition yielded lower injury values for all except the chest G’s when compared to the standard upright test. In the misrouting tests the ATD kinematics depended on the routing pivot point, the lower the pivot point the better the ATD kinematics. Similar findings were also observed in the RFCSS tests. The use of top tether with the FFCSS substantially improved the performance of the Hybrid III 3 year old ATD in spite of misuse conditions and the injury values were lower than the corresponding tests with no top tether. The effective reduction was 37% in the HIC values, 6% in the chest G’s, 30% in the head excursion, 22 % in the knee excursion and finally 37 % reduction in the Nij values. PMID:18184489

Menon, Rajiv; Ghati, Yoganand

2007-01-01

45

PATEGE: An Automatic DC Parametric Test Generation System for Series Gated ECL Circuits  

Microsoft Academic Search

For ECL circuits, DC parametric tests such as input current (IIL, IIH), reference voltage (VBB), and power supply current (ICC) tests are executed as well as functional tests. This paper describes an automatic DC parametric test generation system PATEGE for the series gated ECL circuits. PATEGE can automatically generate the test patterns and calculate the expected values for IIL, IIH,

Takuji OGIHARA; S. Saruyama; S. Murai

1985-01-01

46

PATEGE: an automatic DC parametric test generation system for series gated ECL circuits  

Microsoft Academic Search

For ECL circuits. DC parametric tests such as input current (IIL IIH), reference voltage (VBB), and power supply current (ICC) tests are executed as well as functional tests.This paper describes: an automatic DC parametric test generation system PATEGE for the series gated ECL circuits. PATEGE can automatically generate the test patterns and calculate the expected values for IIL, IIH, VBB

Takuji Ogihara; Shuichi Saruyama; Shinichi Murai

1985-01-01

47

What Makes a Coursebook Series Stand the Test of Time?  

ERIC Educational Resources Information Center

Intriguingly, at a time when the ELT market is inundated with state-of-the-art coursebooks teaching modern-day English, a 30-year-old series enjoys continuing popularity in some secondary schools in Hungary. Why would teachers, several of whom are school-based teacher-mentors in the vanguard of the profession, purposefully choose materials which…

Illes, Eva

2009-01-01

48

Full-scale aircraft cabin flammability tests of improved fire-resistant materials, test series 2  

NASA Technical Reports Server (NTRS)

Full-scale aircraft flammability tests in which the effectiveness of new fire-resistant materials was evaluated by comparing their burning characteristics with those of other fire-resistant aircraft materials were described. New-fire-resistant materials that are more economical and better suited for aircraft use than the previously tested fire-resistant materials were tested. The fuel ignition source for one test was JP-4; a smokeless fuel was used for the other test. Test objectives, methods, materials, and results are presented and discussed. The results indicate that, similar to the fire-resistant materials tested previously, the new materials decompose rather than ignite and do not support fire propagation. Furthermore, the new materials did not produce a flash fire.

Stuckey, R. N.; Bricker, R. W.; Kuminecz, J. F.; Supkis, D. E.

1976-01-01

49

Current Developments in Language Testing. Anthology Series 25.  

ERIC Educational Resources Information Center

The selection of papers on language testing includes: "Language Testing in the 1990s: How Far Have We Come? How Much Further Have We To Go?" (J. Charles Alderson); "Current Research/Development in Language Testing" (John W. Oller, Jr.); "The Difficulties of Difficulty: Prompts in Writing Assessment" (Liz Hamp-Lyons, Sheila Prochnow); "The Validity…

Anivan, Sarinee, Ed.

50

NASA Boeing 757 HIRF test series low power on-the-ground tests  

SciTech Connect

The data acquisition phase of a program intended to provide data for the validation of computational, analytical, and experimental techniques for the assessment of electromagnetic effects in commercial transports; for the checkout of instrumentation for following test programs; and for the support of protection engineering of airborne systems has been completed. Funded by the NASA Fly-By-Light/ Power-By-Wire Program, the initial phase involved on-the-ground electromagnetic measurements using the NASA Boeing 757 and was executed in the LESLI Facility at the USAF Phillips Laboratory. The major participants in this project were LLNL, NASA Langley Research Center, Phillips Laboratory, and UIE, Inc. The tests were performed over a five week period during September through November, 1994. Measurements were made of the fields coupled into the aircraft interior and signals induced in select structures and equipment under controlled illumination by RF fields. A characterization of the ground was also performed to permit ground effects to be included in forthcoming validation exercises. This report and the associated test plan that is included as an appendix represent a definition of the overall on-the-ground test program. They include descriptions of the test rationale, test layout, and samples of the data. In this report, a detailed description of each executed test is provided, as is the data identification (data id) relating the specific test with its relevant data files. Samples of some inferences from the data that will be useful in protection engineering and EM effects mitigation are also presented. The test plan which guided the execution of the tests, a test report by UIE Inc., and the report describing the concrete pad characterization are included as appendices.

Poggio, A.J.; Pennock, S.T.; Zacharias, R.A.; Avalle, C.A.; Carney, H.L. [National Aeronautics and Space Administration, Langley AFB, VA (United States). Langley Research Center] [National Aeronautics and Space Administration, Langley AFB, VA (United States). Langley Research Center

1996-08-01

51

IMPROVED LABORATORY DISPERSANT EFFECTIVENESS TEST  

EPA Science Inventory

The U.S. Environmental Protection Agency (EPA) initiated a program to evaluate an Improved Laboratory Dispersant Effectiveness Test (ILDET) which was developed to replace EPA's Revised Standard Dispersant Effectiveness Test (RSDET). The report summarizes the development of the IL...

52

The Building Blocks of State Testing Programs. Statement Series.  

ERIC Educational Resources Information Center

To ensure that educational tests do the least harm and bring the greatest good to the education of elementary and secondary school students, it is important that parents, teachers, educational administrators, and policy makers be actively involved in test construction and use. The purpose of this Statement is to provide a checklist of some…

Shore, Arnold; Pedulla, Joseph; Clarke, Marguerite

53

Experiment data report for Semiscale Mod3 blowdown heat transfer test S-07-1 (baseline test series). [PWR  

Microsoft Academic Search

Recorded test data are presented for Test S-07-1 of the Semiscale Mod-3 baseline test series. This test is one of several Semiscale Mod-3 experiments conducted to investigate the thermal and hydraulic phenomena accompanying a hypothesized loss-of-coolant accident in a pressurized water reactor (PWR) system. Test S-07-1 was conducted from initial conditions of 15 878 kPa and 559 K to investigate

B. L. Collins; K. E. Sackett; K. Stanger

1978-01-01

54

Experiment data report for Semiscale Mod3 blowdown heat transfer test S-07-3 (baseline test series). [PWR  

Microsoft Academic Search

Recorded test data are presented for Test S-07-3 of the Semiscale Mod-3 baseline test series. This test is one of several Semiscale Mod-3 experiments conducted to investigate the thermal and hydraulic phenomena accompanying a hypothesized loss-of-coolant accident in a pressurized water reactor (PWR) system. Test S-07-3 was conducted from initial conditions of 15.90 MPa and 558 K to investigate the

R. L. Gillins; K. E. Sackett; K. Stanger

1978-01-01

55

Experiment data report for Semiscale Mod3 blowdown heat transfer test S-07-2 (baseline test series). [PWR  

Microsoft Academic Search

Recorded test data are presented for Test S-07-2 of the Semiscale Mod-3 baseline test series. This test is one of several Semiscale Mod-3 experiments conducted to investigate the thermal and hydraulic phenomena accompanying a hypothesized loss-of-coolant accident in a pressurized water reactor (PWR) system. Test S-07-2 was conducted from initial conditions of 15.1 MPa and 558 K to investigate the

V. Esparza; K. E. Sackett; K. Stanger

1978-01-01

56

National Poverty Center Working Paper Series The Black-White Test Score Gap  

E-print Network

National Poverty Center Working Paper Series #05-09 June 2005 The Black-White Test Score Gap This paper is available online at the National Poverty Center Working Paper Series index at: http of the author(s) and do not necessarily reflect the view of the National Poverty Center or any sponsoring agency

Shyy, Wei

57

The Use of Time Series Analysis and t Tests with Serially Correlated Data Tests.  

ERIC Educational Resources Information Center

Results of three methods of analysis applied to simulated autocorrelated data sets with an intervention point (varying in autocorrelation degree, variance of error term, and magnitude of intervention effect) are compared and presented. The three methods are: t tests; maximum likelihood Box-Jenkins (ARIMA); and Bayesian Box Jenkins. (Author/AEF)

Nicolich, Mark J.; Weinstein, Carol S.

1981-01-01

58

Shot Bee, a test of the TEAPOT series, 22 March 1955. Technical report  

SciTech Connect

This report describes the activities of more than 3,000 DOD personnel, both military and civilian, in Shot BEE, the sixth nuclear test in the TEAPOT atmospheric nuclear weapons testing series. The test was conducted on 22 March 1955 and involved participants from Exercise Desert Rock VI, AFSWP, AFSWC, and the AEC Test Groups. The Marine Brigade Exercise troop test involved 2,271 Marines and was the largest single project conducted during Operation TEAPOT.

Maag, C.; Wilkinson, M.; Rohrer, S.

1981-11-24

59

X-0557 modified Steven tests : series I and II /.  

SciTech Connect

Low-velocity mechanical impact leading to unintentional reaction is of concern in accident scenarios involving the handling, transport, and storage of high explosives (HE). These have been investigated using different experimental techniques, from small- to large-scale, including, but not limited to the drop weight impact, Taylor anvil impact, Susan,1 and more recently, the Steven and Modified Steven tests.2-8 Ideally, the data will be used to further advance 3-D finite element analysis predictive capability with improved bulk constitutive HE models for the assessment of HE response to mechanical insult. Our overall objectives for these experiments were to (1) evaluate the HE reaction threshold behavior for two different lots of X-0557, and (2) characterize the degree of reaction violence relative to a detonation. This report summarizes our single impact test results on the two different lots of X-0557 in Modified Steven targets.

Straight, J. W. (James W.); Osborn, M. A. (Michael A.); Coulter, W. L. (William L.); Mang, J. T. (Joseph T.); Anderson, M. C. (Mark C.); Idar, D. J. (Deanne J.)

2002-01-01

60

Ground testing on the nonvented fill method of orbital propellant transfer: Results of initial test series  

NASA Technical Reports Server (NTRS)

The results are presented of a series of no-vent fill experiments conducted on a 175 cu ft flightweight hydrogen tank. The experiments consisted of the nonvented fill of the tankage with liquid hydrogen using two different inlet systems (top spray, and bottom spray) at different tank initial conditions and inflow rates. Nine tests were completed of which six filled in excess of 94 percent. The experiments demonstrated a consistent and repeatable ability to fill the tank in excess of 94 percent using the nonvented fill technique. Ninety-four percent was established as the high level cutoff due to requirements for some tank ullage to prevent rapid tank pressure rise which occurs in a tank filled entirely with liquid. The best fill was terminated at 94 percent full with a tank internal pressure less than 26 psia. Although the baseline initial tank wall temperature criteria was that all portions of the tank wall be less than 40 R, fills were achieved with initial wall temperatures as high as 227 R.

Chato, David J.

1991-01-01

61

Single-event Effect Report for EPC Series eGaN FETs: Comparison of EPC1000 and EPC2000 Series Devices for Destructive SEE  

NASA Technical Reports Server (NTRS)

Recent testing of the EPC1000 series eGaN FETs has shown sensitivity to Single Event Effects (SEE) that are destructive. These effects are most likely the failure of the very thin gate structure in HEMT architecture. EPC has recently changed the doping of the substrate to improve the performance and the SEE response. This testing compares the SEE response of both devices.

Scheick, Leif

2014-01-01

62

Aircraft control surface failure detection and isolation using the OSGLR test. [orthogonal series generalized likelihood ratio  

NASA Technical Reports Server (NTRS)

The performance of the orthogonal series generalized likelihood ratio (OSGLR) test in detecting and isolating commercial aircraft control surface and actuator failures is evaluated. A modification to incorporate age-weighting which significantly reduces the sensitivity of the algorithm to modeling errors is presented. The steady-state implementation of the algorithm based on a single linear model valid for a cruise flight condition is tested using a nonlinear aircraft simulation. A number of off-nominal no-failure flight conditions including maneuvers, nonzero flap deflections, different turbulence levels and steady winds were tested. Based on the no-failure decision functions produced by off-nominal flight conditions, the failure detection and isolation performance at the nominal flight condition was determined. The extension of the algorithm to a wider flight envelope by scheduling on dynamic pressure and flap deflection is examined. Based on this testing, the OSGLR algorithm should be capable of detecting control surface failures that would affect the safe operation of a commercial aircraft. Isolation may be difficult if there are several surfaces which produce similar effects on the aircraft. Extending the algorithm over the entire operating envelope of a commercial aircraft appears feasible.

Bonnice, W. F.; Motyka, P.; Wagner, E.; Hall, S. R.

1986-01-01

63

An improved portmanteau test for autocorrelated errors in interrupted time-series regression models  

Microsoft Academic Search

A new portmanteau test for autocorrelation among the errors of interrupted time-series regression models is proposed. Simulation\\u000a results demonstrate that the inferential properties of the proposedQ\\u000a H-M test statistic are considerably more satisfactory than those of the well known Ljung-Box test and moderately better than\\u000a those of the Box-Pierce test. These conclusions generally hold for a wide variety of autoregressive

Bradley E. Huitema; Joseph W. McKean

2007-01-01

64

Effective Second Language Writing. TESOL Classroom Practice Series  

ERIC Educational Resources Information Center

The classroom practices discussed in "Effective Second Language Writing" reflect various trends and methodologies; however, the underlying theme in this volume of the Classroom Practice Series is the need for clear and meaningful communication between ESL writers and their readers. While approaches differ, two core beliefs are constant: ESL…

Kasten, Susan, Ed.

2010-01-01

65

Enraf series 854 Advanced Technology Gauge (ATG) acceptance test procedure. Revision 3  

SciTech Connect

This procedure provides acceptance testing for Enraf Series 854 level gauges used to monitor levels in Hanford Waste Storage Tanks. The test will verify that the gauge functions according to the manufacturer`s instructions and specifications and is properly setup prior to being delivered to the tank farm area.

Barnes, G.A.

1995-05-08

66

Testing for a Unit Root in a Time Series With a Changing Mean  

Microsoft Academic Search

This study considers testing for a unit root in a time series characterized by a structural change in its mean level. My approach follows the “intervention analysis” of Box and Tiao (1975) in the sense that I consider the change as being exogenous and as occurring at a known date. Standard unit-root tests are shown to be biased toward nonrejection

Pierre Perron

1990-01-01

67

SERIES-X test results. [for measuring TOPEX earth satellite orbits  

NASA Technical Reports Server (NTRS)

The SERIES-X project which demonstrates the feasibility of a method involving measurements of the distance from the TOPEX earth satellite and various points on the ground to Global Positioning System (GPS) satellites is described. The features of SERIES-X are compared with three better-known geodetic-quality GPS systems (Geostar, Macrometer, and SERIES). It is shown that the system is capable of measuring the positions of isolated stations, but its accuracy is improved when it measures baselines. Test results of some measurements of baselines ranging in length from 15 to 171,000 m are presented and discussed.

Crow, R. B.; Bletzacker, F. R.; Najarian, R. J.; Purcell, G. H., Jr.; Statman, J. I.; Thomas, J. B.

1984-01-01

68

Experiment data report for Semiscale Mod-2A Intermediate Break Test Series (Test S-IB-3). [Data on microfiche  

SciTech Connect

This report presents test data recorded for Test S-IB-3 of the Semiscale Mod-2A Intermediate Break Test Series. This test is one of a series of Semiscale tests investigating thermal-hydraulic phenomena resulting from a hypothesized loss-of-coolant accident (LOCA) in a pressurized water reactor (PWR) system. These tests provide experimental data for assessing the analytical capability of computer codes used in LOCA analysis. The primary objective of Test S-IB-3 was to provide reference data for comparison of Semiscale test results with those from the LOBI B-RIM test conducted in the Loop Blowdown Investigation Facility at Ispra, Italy. Test IB-3 will also expand the break data base in the 10 to 200% range. Test S-IB-3 was conducted from initial conditions closely approximating the specified initial conditions: system pressure, 15.5 MPa; cold leg temperature, 563/sup 0/ K; and core power level, 1.44 MW. This report presents the uninterpreted data, mostly in microfiche form.

Sackett, K.E.; Clegg, L.B.

1982-06-01

69

ORNL rod-bundle heat-transfer test data. Volume 7. Thermal-Hydraulic Test Facility experimental data report for test series 3. 07. 9 - steady-state film boiling in upflow  

Microsoft Academic Search

Thermal-Hydraulic Test Facility (THTF) test series 3.07.9 was conducted by members of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer (BDHT) Separate-Effects Program on September 11, September 18, and October 1, 1980. The objective of the program is to investigate heat transfer phenomena believed to occur in PWRs during accidents, including small- and large-break loss-of-coolant accidents. Test

C. B. Mullins; D. K. Felde; A. G. Sutton; S. S. Gould; D. G. Morris; J. J. Robinson

1982-01-01

70

Optical Kerr-effect measurement for a series of alcohols  

NASA Astrophysics Data System (ADS)

Nanosecond optical Kerr-effect (OKE) measurements are reported using a modified apparatus, designed to enable rapid and precise data recording in pure liquids. Careful design of the apparatus enables measurements to be made at several inducing wavelengths without substantial apparatus modifications. The first measurement of the optical Kerr effect for benzene at an inducing wavelength of 532 nm is presented together with novel OKE data for the hitherto unstudied homologous alcohol series from methanol to 1-dodecanol. Analysis of the results indicates for this series the existence of a linear relationship between the carbon chain length and the optically induced Kerr constant somewhat similar to the behavior previously observed in the n-alkanes.

Harrison, Neil J.; Jennings, Barry R.

1993-06-01

71

ORNL rod-bundle heat-transfer test data. Volume 7. Thermal-Hydraulic Test Facility experimental data report for test series 3. 07. 9 - steady-state film boiling in upflow  

SciTech Connect

Thermal-Hydraulic Test Facility (THTF) test series 3.07.9 was conducted by members of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer (BDHT) Separate-Effects Program on September 11, September 18, and October 1, 1980. The objective of the program is to investigate heat transfer phenomena believed to occur in PWRs during accidents, including small- and large-break loss-of-coolant accidents. Test series 3.07.9 was designed to provide steady-state film boiling data in rod bundle geometry under reactor accident-type conditions. This report presents the reduced instrument responses for THTF test series 3.07.9. Also included are uncertainties in the instrument responses, calculated mass flows, and calculated rod powers.

Mullins, C.B.; Felde, D.K.; Sutton, A.G.; Gould, S.S.; Morris, D.G.; Robinson, J.J.

1982-05-01

72

Transient irradiation effect on 4000 series CMOS circuits  

Microsoft Academic Search

Various CMOS devices from the 4000 series were studied as to the effects on circuit performance of exposure to an X-ray burst. The functional characteristics of the equipment were determined before irradiation, then compared with electrical measurements made on the same equipment after exposure. The radiative beam was produced by an X-ray emitter which generates 20 billion rad\\/sec. Total dosage

G. Goeransson; P. Zamuhl; B. Danielsson

1981-01-01

73

Radioisotope Thermoelectric Generator Transporation System licensed hardware second certification test series and package shock mount system test  

SciTech Connect

This paper presents a summary of two separate drop test a e performed in support of the Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS). The first portion of this paper presents the second series of drop testing required to demonstrate that the RTG package design meets the requirements of Title 10, Code of Federal Regulations, ``Part 71`` (10 CFR 71). Results of the first test series, performed in July 1994, demonstrated that some design changes were necessary. The package design was modified to improve test performance and the design changes were incorporated into the Safety Analysis Report for Packaging (SARP). The second full-size certification test article (CTA-2) incorporated the modified design and was tested at the US Department of Energy`s (DOE) Hanford Site near Richland, Washington. With the successful completion of the test series, and pending DOE Office of Facility Safety Analysis approval of the SARP, a certificate of compliance will be issued for the RTG package allowing its use. The second portion of this paper presents the design and testing of the RTG Package Mount System. The RTG package mount was designed to protect the RTG from excessive vibration during transport, provide shock protection during on/off loading, and provide a mechanism for moving the RTG package with a forklift. Military Standard (MIL-STD) 810E, Transit Drop Procedure (DOE 1989), was used to verify that the shock limiting system limited accelerations in excess of 15 G`s at frequencies below 150 Hz. Results of the package mount drop tests indicate that an impact force of 15 G`s was not exceeded in any test from a free drop height of 457 mm (18 in.).

Ferrell, P.C.; Moody, D.A.

1995-10-01

74

Unraveling the cause-effect relation between time series.  

PubMed

Given two time series, can one faithfully tell, in a rigorous and quantitative way, the cause and effect between them? Based on a recently rigorized physical notion, namely, information flow, we solve an inverse problem and give this important and challenging question, which is of interest in a wide variety of disciplines, a positive answer. Here causality is measured by the time rate of information flowing from one series to the other. The resulting formula is tight in form, involving only commonly used statistics, namely, sample covariances; an immediate corollary is that causation implies correlation, but correlation does not imply causation. It has been validated with touchstone linear and nonlinear series, purportedly generated with one-way causality that evades the traditional approaches. It has also been applied successfully to the investigation of real-world problems; an example presented here is the cause-and-effect relation between the two climate modes, El Niño and the Indian Ocean Dipole (IOD), which have been linked to hazards in far-flung regions of the globe. In general, the two modes are mutually causal, but the causality is asymmetric: El Niño tends to stabilize IOD, while IOD functions to make El Niño more uncertain. To El Niño, the information flowing from IOD manifests itself as a propagation of uncertainty from the Indian Ocean. PMID:25493782

Liang, X San

2014-11-01

75

Thermal-hydraulic analysis of the semiscale Mod1 blowdown heat transfer test series. [PWR  

Microsoft Academic Search

Selected experimental thermal-hydraulic data from the recent Semiscale Mod-1 blowdown heat transfer test series are analyzed from an experimental viewpoint with emphasis on explaining those phenomena which influence core fluid behavior. Comparisons are made between the trends measured by the system instrumentation and the trends predicted by the RELAP4 computer code to aid in obtaining an understanding of the interactions

Cozzuol

1976-01-01

76

Thermal-hydraulic response of the semiscale Mod1 system: isothermal test series  

Microsoft Academic Search

Selected experimental thermal-hydraulic data from the recent isothermal ; blowdown test series performed in the Semiscale Mod-1 geometry are analyzed from ; an experimental viewpoint with emphasis on explaining differences between the ; data and expected results. Comparisons are made between the trends measured by ; the system instrumentation and the trends predicted by analytical tools, ; including the RELAP4

Cartmill

1975-01-01

77

BIMA Memoranda Series Report from First Hat Creek Fiber-Optic Test  

E-print Network

BIMA Memoranda Series Report from First Hat Creek Fiber-Optic Test Lee G. Mundy, William C. Erickson, Arie W. Grossman University of Maryland October 2, 1991 Abstract A fiber-optic link to fiber-optic LO and IF distri* *bution. 1 Introduction During the week of September 16 to 20

78

COMPREHENSIVE SERIES OF TESTS ON SEISMIC PERFORMANCE OF REINFORCED CONCRETE BEAM-COLUMN JOINTS  

E-print Network

moment resisting frame reinforced concrete structures may be more vulnerable than we expect. Immediate in high seismic zone have provisions for design of reinforced concrete beam-column joints to preclude1 COMPREHENSIVE SERIES OF TESTS ON SEISMIC PERFORMANCE OF REINFORCED CONCRETE BEAM-COLUMN JOINTS

Shiohara, Hitoshi

79

Testing a series of causal propositions relating time in child care to children's externalizing behavior.  

PubMed

Prior research has documented associations between hours in child care and children's externalizing behavior. A series of longitudinal analyses were conducted to address 5 propositions, each testing the hypothesis that child care hours causes externalizing behavior. Data from the National Institute of Child Health and Human Development Early Child Care Research Network (NICHD) Study of Early Child Care and Youth Development were used in this investigation because they include repeated measures of child care experiences, externalizing behavior, and family characteristics. There were 3 main findings. First, the evidence linking child care hours with externalizing behavior was equivocal in that results varied across model specifications. Second, the association between child care hours and externalizing behavior was not due to a child effect. Third, child care quality and proportion of time spent with a large group of peers moderated the effects of child care hours on externalizing behavior. The number of hours spent in child care was more strongly related to externalizing behavior when children were in low-quality child care and when children spent a greater proportion of time with a large group of peers. The magnitude of associations between child care hours and externalizing behavior was modest. Implications are that parents and policymakers must take into account that externalizing behavior is predicted from a constellation of variables in multiple contexts. PMID:20053002

McCartney, Kathleen; Burchinal, Margaret; Clarke-Stewart, Alison; Clarke-Stewart, Aliso; Bub, Kristen L; Owen, Margaret T; Belsky, Jay

2010-01-01

80

ORNL rod-bundle heat-transfer test data. Volume 4. ORNL small-break LOCA heat transfer test series II: experimental data report. [PWR  

Microsoft Academic Search

This report presents experimental data and calculated steady-state and transient instrument uncertainties from the Oak Ridge National Laboratory Small Break LOCA Heat Transfer Test Series II. The subject test series was composed of six combined heat transfer and mixture level swell tests, six additional mixture level swell tests, five high-pressure reflood tests, and five high-pressure boiloff tests. Also, the data

T. M. Anklam; D. F. Hunt; D. K. Felde; M. S. Thompson; A. G. Sutton; S. S. Gould; C. R. Hyman

1982-01-01

81

Test Series 2: seismic-fragility tests of naturally-aged Class 1E Exide FHC-19 battery cells  

SciTech Connect

The seismic-fragility of naturally-aged nuclear station safety-related batteries is of interest for two reasons: (1) to determine actual failure modes and their thresholds and (2) to determine the validity of using the electrical capacity of individual cells as an indicator of the ''end-of-life'' of a battery if subjected to a seismic event. This report, the second in a test series of an extensive seismic research program, covers the testing of 10-year old lead-calcium Exide FHC-19 cells from the Calvert Cliffs Nuclear Power Station operated by the Baltimore Gas and Electric Company. The Exide cells were tested in two configurations using a triaxial shake table: single-cell tests, both rigidly and loosely mounted; and multicell (three-cell) tests, mounted in a typical battery rack. A total of six electrically active cells was used in the two different cell configurations.

Bonzon, L. L.; Hente, D. B.; Kukreti, B. M.; Schendel, J.; Tulk, J. D.; Janis, W. J.; Black, D. A.; Paulsen, G. D.; Aucoin, B. D.

1985-03-01

82

Hospital waste shredder test series at the DONLEE Pilot Test Facility. Final report  

SciTech Connect

This report describes the coal firing and coal and noninfectious hospital waste co-firing testing and emissions rates for the tests conducted at the DONLEE pilot plant facility during mid-December 1991 through early March 1992. The emissions obtained during these tests are in turn used to predict the emission rates for the proof-of-concept facility that is to be built at the Lebanon Veterans Affairs Medical Center. In addition, the reliability and performance of the waste shredding/feeding system were evaluated from this testing.

Not Available

1992-09-01

83

Hospital waste shredder test series at the DONLEE Pilot Test Facility  

SciTech Connect

This report describes the coal firing and coal and noninfectious hospital waste co-firing testing and emissions rates for the tests conducted at the DONLEE pilot plant facility during mid-December 1991 through early March 1992. The emissions obtained during these tests are in turn used to predict the emission rates for the proof-of-concept facility that is to be built at the Lebanon Veterans Affairs Medical Center. In addition, the reliability and performance of the waste shredding/feeding system were evaluated from this testing.

Not Available

1992-09-01

84

Test Series 2: seismic-fragility tests of naturally-aged Class 1E Exide FHC-19 battery cells  

Microsoft Academic Search

The seismic-fragility of naturally-aged nuclear station safety-related batteries is of interest for two reasons: (1) to determine actual failure modes and their thresholds and (2) to determine the validity of using the electrical capacity of individual cells as an indicator of the ''end-of-life'' of a battery if subjected to a seismic event. This report, the second in a test series

L. L. Bonzon; D. B. Hente; B. M. Kukreti; J. Schendel; J. D. Tulk; W. J. Janis; D. A. Black; G. D. Paulsen; B. D. Aucoin

1985-01-01

85

Test series 1: seismic-fragility tests of naturally-aged Class 1E Gould NCX-2250 battery cells  

Microsoft Academic Search

The seismic-fragility response of naturally-aged, nuclear station, safety-related batteries is of interest for two reasons: (1) to determine actual failure modes and thresholds; and (2) to determine the validity of using the electrical capacity of individual cells as an indicator of the end-of-life of a battery, given a seismic event. This report covers the first test series of an extensive

L. L. Bonzon; D. B. Hente; B. M. Kukreti; J. S. Schendel; J. D. Tulk; W. J. Janis; D. A. Black; G. D. Paulsen; B. D. Aucoin

1984-01-01

86

Overview of the 6 Meter HIAD Inflatable Structure and Flexible TPS Static Load Test Series  

NASA Technical Reports Server (NTRS)

To support NASAs long term goal of landing humans on Mars, technologies which enable the landing of heavy payloads are being developed. Current entry, decent, and landing technologies are not practical for this class of payloads due to geometric constraints dictated by current launch vehicle fairing limitations. Therefore, past and present technologies are now being explored to provide a mass and volume efficient solution to atmospheric entry, including Hypersonic Inflatable Aerodynamic Decelerators (HIADs). At the beginning of 2014, a 6m HIAD inflatable structure with an integrated flexible thermal protection system (TPS) was subjected to a static load test series to verify the designs structural performance. The 6m HIAD structure was constructed in a stacked toroid configuration using nine inflatable torus segments composed of fiber reinforced thin films, which were joined together using adhesives and high strength textile woven structural straps to help distribute the loads throughout the inflatable structure. The 6m flexible TPS was constructed using multiple layers of high performance materials to protect the inflatable structure from heat loads that would be seen during atmospheric entry. To perform the static load test series, a custom test fixture was constructed. The fixture consisted of a structural tub rim with enough height to allow for displacement of the inflatable structure as loads were applied. The bottom of the tub rim had an airtight seal with the floor. The centerbody of the inflatable structure was attached to a pedestal mount as seen in Figure 1. Using an impermeable membrane seal draped over the test article, partial vacuum was pulled beneath the HIAD, resulting in a uniform static pressure load applied to the outer surface. During the test series an extensive amount of instrumentation was used to provide many data sets including: deformed shape, shoulder deflection, strap loads, cord loads, inflation pressures, and applied static load.In this overview, the 6m HIAD static load test series will be discussed in detail, including the 6m HIAD inflatable structure and flexible TPS design, test setup and execution, and finally initial results and conclusions from the test series.

Swanson, Greg; Kazemba, Cole; Johnson, Keith; Calomino, Anthony; Hughes, Steve; Cassell, Alan; Cheatwood, Neil

2014-01-01

87

Test series 1: seismic-fragility tests of naturally-aged Class 1E Gould NCX-2250 battery cells  

SciTech Connect

The seismic-fragility response of naturally-aged, nuclear station, safety-related batteries is of interest for two reasons: (1) to determine actual failure modes and thresholds; and (2) to determine the validity of using the electrical capacity of individual cells as an indicator of the end-of-life of a battery, given a seismic event. This report covers the first test series of an extensive program using 12-year old, lead-calcium, Gould NCX-2250 cells, from the James A. Fitzpatrick Nuclear Power Station operated by the New York Power Authority. Seismic tests with three cell configurations were performed using a triaxial shake table: single-cell tests, rigidly mounted; multi-cell (three) tests, mounted in a typical battery rack; and single-cell tests specifically aimed towards examining propagation of pre-existing case cracks. In general the test philosophy was to monitor the electrical properties including discharge capacity of cells through a graduated series of g-level step increases until either the shake-table limits were reached or until electrical failure of the cells occurred. Of nine electrically active cells, six failed during seismic testing over a range of imposed g-level loads in excess of a 1-g ZPA. Post-test examination revealed a common failure mode, the cracking at the abnormally brittle, positive lead bus-bar/post interface; further examination showed that the failure zone was extremely coarse grained and extensively corroded. Presently accepted accelerated-aging methods for qualifying batteries, per IEEE Std. 535-1979, are based on plate growth, but these naturally-aged 12-year old cells showed no significant plate growth.

Bonzon, L. L.; Hente, D. B.; Kukreti, B. M.; Schendel, J. S.; Tulk, J. D.; Janis, W. J.; Black, D A; Paulsen, G. D.; Aucoin, B. D.

1984-09-01

88

ORNL small-break LOCA heat transfer test series I: rod bundle heat transfer analysis  

Microsoft Academic Search

ORNL has experimentally investigated heat transfer and reflood under conditions similar to those expected in small-break loss-of-coolant accidents (SBLOCAs). Presented are results and analysis of the first of two series of uncovered bundle heat transfer tests. Specifically, a high-pressure high-temperature data base of experimental heat transfer coefficients and local fluid conditions has been compiled. In addition, a heat transfer model

Anklam

1981-01-01

89

Beta/gamma test problems for ITS. [Integrated Tiger Series (ITS)  

SciTech Connect

The Integrated Tiger Series of Coupled Electron/Photon Monte Carlo Transport Codes (ITS 3.0, PC Version) was used at Oak Ridge National Laboratory (ORNL) to compare with and extend the experimental findings of the beta/gamma response of selected health physics instruments. In order to assure that ITS gives correct results, several beta/gamma problems have been tested. ITS was used to simulate these problems numerically, and results for each were compared to the problem's experimental or analytical results. ITS successfully predicted the experimental or analytical results of all tested problems within the statistical uncertainty inherent in the Monte Carlo method.

Mei, G.T.

1993-01-01

90

Minimum-test series for the intermediate-size inducer pump in SPTF at ETEC  

SciTech Connect

The overall test program includes pump assembly, installation, testing, removal from the test loop, disassembly and final inspection of the entire pump. Testing will include: checkout tests, head/flow and efficiency characterizations at design and two-loop flow/speed ratios and at selected sodium temperatures; suction performance determination; and a design point endurance test, up to 2000 hours, based on available time. The endurance test will be run at 100 percent NPSH margin. After testing, the pump will be cleaned of sodium, disassembled, and examined to determine the effects of operation at 100 percent NPSH margin for an extended period of time. The testing will be done at Energy Technology Engineering Center (ETEC). Assembly, sodium removal, disassembly, and initial inspection will be performed at Component Handling and Cleaning Facility (CHCF) and sodium testing will be done at Sodium Pump Test Facility (SPTF).

Not Available

1980-01-04

91

Modulation and SSR tests performed on the BPA 500 kV thyristor controlled series capacitor unit at Slatt substation  

SciTech Connect

Field experience is reported for a thyristor controlled series capacitor (TCSC) recently commissioned at BPA`s Slatt substation. Subsynchronous resonance tests show that TCSC interactions with shaft dynamics of PGE`s Boardman steam generator are well understood and are effectively avoided by normal TCSC valve firing logic. Modulation tests, performed with the Boardman plant off line, show that the TCSC can be a powerful and responsive actuator for swing damping. Security considerations did not permit lightly damped operation of the controlled plant. Close analysis indicates that the TCSC damping contribution, though small, was measurable. The best estimate is that damping for the McNary mode is 7.33% and 8.55%, for the TCSC damper loop open and closed respectively. TCSC testing and monitoring is facilitated by an advanced interactive measurement network representing BPA`s approach to the information requirements of major control systems.

Hauer, J.F. [Pacific Northwest Lab., Richland, WA (United States)] [Pacific Northwest Lab., Richland, WA (United States); Mittelstadt, W.A. [Bonneville Power Administration, Portland, OR (United States)] [Bonneville Power Administration, Portland, OR (United States); Piwko, R.J. [General Electric Co., Schenectady, NY (United States)] [General Electric Co., Schenectady, NY (United States); Damsky, B.L. [Electric Power Research Inst., Palo Alto, CA (United States)] [Electric Power Research Inst., Palo Alto, CA (United States); Eden, J.D. [Portland General Electric, OR (United States)] [Portland General Electric, OR (United States)

1996-05-01

92

Modulation and SSR tests performed on the BPA 500 kV thyristor controlled series capacitor unit at Slatt substation  

SciTech Connect

Field experience is reported for a thyristor controlled series capacitor (TCSC) recently commissioned at BPA`s Slatt substation. Subsynchronous resonance tests show that TCSC interactions with shaft dynamics of PGE`s Boardman steam generator are well understood and are effectively avoided by normal TCSC valve firing logic. Modulation tests, performed with the Boardman plant off line, show that the TCSC can be a powerful and responsive actuator for swing damping. Security considerations did not permit lightly damped operation of the controlled plant. Close analysis indicates that the TCSC damping contribution, though small, was measurable. The best estimate is that damping for the McNary mode is 7.33% and 8.55%, for the TCSC damper loop open and closed respectively. TCSC testing and monitoring is facilitated by an advanced interactive measurement network representing BPA`s approach to the information requirements of major control systems.

Hauer, J.F. [Pacific Northwest Lab., Richland, WA (United States)] [Pacific Northwest Lab., Richland, WA (United States); Mittelstadt, W.A. [Bonneville Power Administration, Portland, OR (United States)] [Bonneville Power Administration, Portland, OR (United States); Piwko, R.J. [General Electric Co., Schenectady, NY (United States)] [General Electric Co., Schenectady, NY (United States); Damsky, B.L. [Electric Power Research Inst., Palo Alto, CA (United States)] [Electric Power Research Inst., Palo Alto, CA (United States); Eden, J.D. [Portland General Electric, OR (United States)] [Portland General Electric, OR (United States)

1995-07-01

93

Strategies of symbolization in cardiovascular time series to test individual gestational development in the fetus.  

PubMed

The analysis of symbolic dynamics applied to physiological time series retrieves dynamical properties of the underlying regulation which are robust against the symbolic transformation. In this study, three different transformations to produce a symbolic series were applied to fetal RR interval series to test whether they reflect individual changes of fetal heart rate variability in the course of pregnancy. Each transformation was applied to 215 heartbeat datasets obtained from 11 fetuses during the second and the third trimester of pregnancy (at least 10 datasets per fetus, median 17). In the symbolic series, the occurrence of symbolic sequences of length 3 was categorized according to the amount of variations in the sequence: no variation of the symbols, one variation, two variations. Linear regression with respect to gestational age showed that the individual course during pregnancy performed best using a binary transformation reflecting whether the RR interval differences are below or above a threshold. The median goodness of fit of the individual regression lines was 0.73 and also the variability among the individual slopes was low. Other transformations to symbolic dynamics performed worse but were still able to reflect the individual progress of fetal cardiovascular regulation. PMID:25548263

Cysarz, Dirk; Edelhäuser, Friedrich; Van Leeuwen, Peter

2015-02-13

94

REACTIVITY INITIATED ACCIDENT TEST SERIES TEST RIA 1-4 EXPERIMENT PREDICTIONS  

SciTech Connect

The results of the pretest analyses for Test RIA 1-4 are presented. Test RIA 1-4 consists of a 3x3 array of previously irradiated MAP! fuel rods. The rods have 5.7% enriched UO{sub 2} fuel in zircaloy-4 cladding with an average burnup of 5300 MWd/t. The objective for Test RIA 1-4 is to provide information regarding loss-of-coolable fuel rod geometry following RIA event for a radial-average peak fuel enthalpy equivalent to the present licensing criteria of 1172 J/g (280 cal/g UO{sub 2}). Radial averaged peak fuel enthalpies of 1172 J/g (280 cal/g) 1077 J/g {257 cal/g), and 978 J/g (234 cal/g) for the corner, side, and center fuel rods, respectively, are planned to be achieved during a 2.7 ms reactor period power burst. The results of the FRAP-T5 analyses indicate that all nine rods will fail within 26 ms from the start of the power burst due to pellet-cladding mechanical interaction. All of the rods will undergo partial fuel melting. All rods will operate under extended film boiling (>30 sec) conditions and about 70% of the cladding length is expected to be molten. Approximately 15% of the cladding thickness will be oxided. Fuel swelling due to fission gas release and melting combined with fuel and cladding fragmentation, will probably produce a complete coolant flow blockage within the flow shroud.

Fukuda, S. K.; Martinson, Z. R.

1980-02-01

95

Assessing and Improving State-Based Class Testing: A Series of Experiments  

E-print Network

--This paper describes an empirical investigation of the cost effectiveness of well-known state-based testing and effectiveness? . What, in general, are the cost-effectiveness tradeoffs to be considered? Such investigations], [26], [37]. However, little is known about the effectiveness in practice of such criteria. Since

Di Penta, Massimiliano

96

[The dermatoscopy in the skin pathergy testing: case series in patients with suspected Behçet's Disease].  

PubMed

Behçet's disease is a multisystemic disease consisting of a varying combination of ocular, mucocutaneous, neurologic, cardiovascular, gastrointestinal and other manifestations. Its diagnosis is based on clinical criteria, in which a positive pathergy test scores 1. A case series with 26 suspected patients is presented, and the skin pathergy test was performed in 23. The results were read in 48hours, and they were considered negative when without papule, and positive with a papule or pustule. Positive results were divided by papule size, and dermatoscopy was done to measure and observe its clinical aspects. After the readings, a biopsy was performed, with annotation of histopathological aspects. The test was negative in 2 (8.7%) and positive in 21 (91.3%) patients. The results and the literature review are presented. PMID:25445631

Scherrer, Maria Antonieta Rios; de Castro, Lúcia Porto Fonseca; Rocha, Vanessa Barreto; Pacheco, Leonardo

2014-01-01

97

Clinical effectiveness of electroacupuncture in meralgia paraesthetica: a case series  

PubMed Central

Background Meralgia paraesthetica is a fairly common condition resulting from entrapment of the lateral femoral cutaneous nerve. I have found that acupuncture produces a rapid improvement, sometimes effecting a cure, after only one or two treatments. I therefore invited referrals in order to collect a case series. Methods A series of 10 patients, which included two who had refused surgery, but excluded those with significant lumbar spine problems, were treated. Visual Analogue Scale pain scores and analgesic intake were recorded weekly, starting before treatment. Four patients were receiving high doses of analgesics and the average period of symptoms was 3–4?years. Acupuncture points used were BL25, GB30, GB34, GB31, GB32, Huatuojiaji and ah shi points of the buttock and thigh, up to a depth of 7.5?cm. Electroacupuncture was normally given from the second treatment. Results Without exception, patients were specifically tender over GB31 before they started treatment. Most were also tender over the upper lumbar spine. An average of four to five sessions of acupuncture was given. The pain scores for all 10 patients improved by at least 50%, including that of a patient with a 20-year history. At follow-up (varying from 3 to 36?months), improvement was nearly 100%. Most patients were able to stop their analgesics. Conclusions Meralgia paraesthetica appears to respond rapidly to electroacupuncture. A significant trigger point at GB31 was universally present, which may aid diagnosis, although the reason for this is unclear. Further controlled studies are justified. PMID:24152611

Alexander, Rosemary E

2013-01-01

98

Fitting Categorical Models to Effect Sizes from a Series of Experiments  

Microsoft Academic Search

One method of combining the results of a series of two-group experiments involves the estimation of the effect size (population value of the standarized mean difference) for each experiment. When each experiment has the same effect size, a pooled estimate of effect size provides a summary of the results of the series of experiments. However, when effect sizes are not

Larry V. Hedges

1982-01-01

99

A test of uranium-series dating of fossil tooth enamel: results from Tournal Cave, France  

USGS Publications Warehouse

A series of well preserved mammal bones and horse teeth was analyzed from archaeological levels of Tournal Cave (Magdalenian, Aurignacian, and Mousterain) to test the hypothesis that well-crystallized enamel behaves more as a closed system than does whole bone. The isotopic composition of bones and tooth enamels from this deposit meet criteria for confidence, and gave no reasons to suspect contamination or open-system behavior. Two samples for which 231Pa could be analyzed showed internal concordance with the respective 230Th ages. In spite of the favourable isotopic criteria, however, comparison of the U-series ages of the bones and the tooth enamel with stratigraphic position and 14C control indicated the dates were not meaningful. In general, both bones and tooth enamels gave ages too young, although some were clearly too old. Neither group showed any systematic increase of age with stratigraphic depth. Tooth enamel, therefore, shows no advantage over bone for U-series dating for this site. In Tournal cave both bones and enamel are apparently open to U, which is probably cycling as a consequences of post-depositional groundwater movement. ?? 1988.

Bischoff, J.L.; Rosenbauer, R.J.; Tavoso, A.; de Lumley, H.

1988-01-01

100

Estimation of interaction between climatic processes: Effect of sparse sample of analyzed data series  

NASA Astrophysics Data System (ADS)

It is shown that the approach based on the Granger causality may lead to erroneous conclusions about bidirectional coupling (BC) in the case of unidirectional coupling (UC) and quite a sparse sample of the data series analyzed. This effect was revealed in an analysis of coupling between variations in the solar irradiance and global surface temperature. We present a statistical test to confirm or reject speculations about the character (unidirectional or bidirectional) of coupling. The corresponding analysis of coupling between phenomena of El Niño and the Indian Monsoon confirmed the earlier conclusions about their mutual influence.

Smirnov, D. A.; Mokhov, I. I.

2013-09-01

101

The Interrupted Time Series as Quasi-Experiment: Three Tests of Significance. A Fortran Program for the CDC 3400 Computer.  

ERIC Educational Resources Information Center

Computational formulae for the following three tests of significance, useful in the interrupted time series design, are given: (1) a "t" test (Mood, 1950) for the significance of the first post-change observation from a value predicted by a linear fit of the pre-change observations; (2) an "F" test (Walker and Lev, 1953) of the hypothesis that one…

Sween, Joyce; Campbell, Donald T.

102

Experiment data report for semiscale Mod3 integral blowdown and reflood heat transfer test S-07-6 (Baseline Test Series). [PWR  

Microsoft Academic Search

Recorded test data are presented for Test S-07-6 of the Semiscale Mod-3 baseline test series. This test is one of several Semiscale Mod-3 experiments conducted to investigate the thermal and hydraulic phenomena accompanying a hypothesized loss-of-coolant accident in a pressurized water reactor (PWR) system. Test S-07-6 was conducted from initial conditions of 15.21 MPa and 559 K to investigate the

V. Esparza; K. E. Sackett; K. Stanger

1979-01-01

103

Accountability and Testing. NAESP School Leadership Digest Second Series, Number 5. ERIC/CEM Research Analysis Series, Number 20.  

ERIC Educational Resources Information Center

What is meant by "accountability" varies a great deal. It is not, however, the tools such as merit salary plans, voucher plans, and management techniques that are used to achieve accountability. Accountability has from its earliest days been tied to testing. In discussing testing, it is necessary to discuss the pros and cons of standardized, or…

Mazzarella, Jo Ann

104

Systematic Two-Dimensional Cascade Tests of NACA 65-Series Compressor Blades at Low Speeds  

NASA Technical Reports Server (NTRS)

The performance of NACA 65-series compressor blade section in cascade has been investigated systematically in a low-speed cascade tunnel. Porous test-section side walls and for high-pressure-rise conditions, porous flexible end walls were employed to establish conditions closely simulating two-dimensional flow. Blade sections of design lift coefficients from 0 to 2.7 were tested over the usable angle-of-attack range for various combinations of inlet-flow angle. A sufficient number of combinations were tested to permit interpolation and extrapolation of the data to all conditions within the usual range of application. The results of this investigation indicate a continuous variation of blade-section performance as the major cascade parameters, blade camber, inlet angle, and solidity were varied over the test range. Summary curves of the results have been prepared to enable compressor designers to select the proper blade camber and angle of attack when the compressor velocity diagram and desired solidity have been determined.

Emery, James C; Herrig, L Joseph; Erwin, John R; Felix, A Richard

1958-01-01

105

Tank Tests of NACA Model 40 Series of Hulls for Small Flying Boats and Amphibians  

NASA Technical Reports Server (NTRS)

The NACA model 40 series of flying-boat hull models consists of 2 forebodies and 3 afterbodies combined to provide several forms suitable for use in small marine aircraft. One forebody is the usual form with hollow bow sections and the other has a bottom surface that is completely developable from bow to step. The afterbodies include a short pointed afterbody with an extension for the tail surfaces, a long afterbody similar to that of a seaplane float but long enough to carry the tail surfaces, and a third obtained by fitting a second step in the latter afterbody. The various combinations were tested in the NACA Tank by the general method over a suitable range of loadings. Fixed-trim tests were made for all speeds likely to be used and free-to-trim tests were made at low speeds to slightly beyond the hump speed. The characteristics of the hulls at best trim angles have been deduced from the data of the tests at fixed trim angles and are given in the form of nondimensional coefficients applicable to any size hull.

Parkinson, John B; Dawson, John R

1937-01-01

106

Economic downturns and male cesarean deliveries: a time-series test of the economic stress hypothesis  

PubMed Central

Background In light of the recent Great Recession, increasing attention has focused on the health consequences of economic downturns. The perinatal literature does not converge on whether ambient economic declines threaten the health of cohorts in gestation. We set out to test the economic stress hypothesis that the monthly count of cesarean deliveries (CD), which may gauge the level of fetal distress in a population, rises after the economy declines. We focus on male CD since the literature reports that male more than female fetuses appear sensitive to stressors in utero. Methods We tested our ecological hypothesis in California for 228 months from January 1989 to December 2007, the most recent data available to us at the time of our tests. We used as the independent variable the Bureau of Labor Statistics unadjusted total state employment series. Time-series methods controlled for patterns of male CD over time. We also adjusted for the monthly count of female CD, which controls for well-characterized factors (e.g., medical-legal environment, changing risk profile of births) that affect CD but are shared across infant sex. Results Findings support the economic stress hypothesis in that male CD increases above its expected value one month after employment declines (employment coefficient?=?-24.09, standard error?=?11.88, p?=?.04). Additional exploratory analyses at the metropolitan level indicate that findings in Los Angeles and Orange Counties appear to drive the State-level relation. Conclusions Contracting economies may perturb the health of male more than female fetuses sufficiently enough to warrant more CD. Male relative to female CD may sensitively gauge the cohort health of gestations. PMID:24906208

2014-01-01

107

Test Series 3: seismic-fragility tests of naturally-aged Class 1E C and D LCU-13 battery cells  

Microsoft Academic Search

This report, the third in a test series of an extensive seismic research program, covers the testing of 10-year old lead-calcium C and D LCU-13 cells from the North Anna Nuclear Power Station operated by the Virginia Electric and Power Company. The C and D cells were tested in two configurations using a triaxial shake table: single-cell tests, both rigidly

L. L. Bonzon; D. B. Hente; B. M. Kukreti; J. Schendel; J. D. Tulk; W. J. Janis; D. A. Black; G. D. Paulsen; B. D. Aucoin

1985-01-01

108

Pretest Report for the Full Span Propulsive Wing/Canard Model Test in the NASA Langley 4 x 7 Meter Low Speed Wind Tunnel Second Series Test  

NASA Technical Reports Server (NTRS)

A full span propulsive wing/canard model is to be tested in the NASA Langley Research Center (LaRC) 4 x 7 meter low speed wind tunnel. These tests are a continuation of the tests conducted in Feb. 1984, NASA test No.290, and are being conducted under NASA Contract NAS1-17171. The purpose of these tests is to obtain extensive lateral-directional data with a revised fuselage concept. The wings, canards, and vertical tail of this second test series model are the same as tested in the previous test period. The fuselage and internal flow path have been modified to better reflect an external configuration suitable for a fighter airplane. Internal ducting and structure were changed as required to provide test efficiency and blowing control. The model fuselage tested during the 1984 tests was fabricated with flat sides to provide multiple wing and canard placement variations. The locations of the wing and canard are important variables in configuration development. With the establishment of the desired relative placement of the lifting surfaces, a typically shaped fuselage has been fabricated for these tests. This report provides the information necessary for the second series tests of the propulsive wing/canard model. The discussion in this report is limited to that affected by the model changes and to the second series test program. The pretest report information for test 290 which is valid for the second series test was published in Rockwell report NR 83H-79. This report is presented as Appendix 1 and the modified fuselage stress report is presented as Appendix 2 to this pretest report.

Stewart, V. R.

1986-01-01

109

The Governance Committee: Independent Institutions. AGB Effective Committee Series  

ERIC Educational Resources Information Center

This publication is part of an AGB series devoted to strengthening the role of key standing committees of governing boards. While there is no optimal committee system for institutions of higher education, certain principles, practices, and procedures prevail. The best practices outlined in this publication support the objectives of board…

Wilson, E. B.; Lanier, James L.

2013-01-01

110

Note---Analysis of Time Series with Calendar Effects  

Microsoft Academic Search

Most national economic data and many marketing series are compiled monthly according to the Gregorian Calendar, but some of the ancient festivals or holidays, such as Easter, Jewish Passover, and Chinese New Year, are set by lunar calendar. Therefore the date of a holiday may vary between two adjacent months from year to year. Some product marketing and consumer behavior

Lon-Mu Liu

1980-01-01

111

Health maintenance facility system effectiveness testing  

NASA Technical Reports Server (NTRS)

The Medical Simulations Working Group conducted a series of medical simulations to evaluate the proposed Health Maintenance Facility (HMF) Preliminary Design Review (PDR) configuration. The goal of these simulations was to test the system effectiveness of the HMF PDR configurations. The objectives of the medical simulations are to (1) ensure fulfillment of requirements with this HMF design, (2) demonstrate the conformance of the system to human engineering design criteria, and (3) determine whether undesirable design or procedural features were introduced into the design. The simulations consisted of performing 6 different medical scenarios with the HMF mockup in the KRUG laboratory. The scenarios included representative medical procedures and used a broad spectrum of HMF equipment and supplies. Scripts were written and simulations performed by medical simulations working group members under observation from others. Data were collected by means of questionnaires, debriefings, and videotapes. Results were extracted and listed in the individual reports. Specific issues and recommendations from each simulation were compiled into the individual reports. General issues regarding the PDR design of the HMF are outlined in the summary report.

Lloyd, Charles W.; Gosbee, John; Bueker, Richard; Kupra, Debra; Ruta, Mary

1993-01-01

112

Effects of structural tests on aircraft safety  

Microsoft Academic Search

This paper investigates the effects of structural tests on aircraft safety. In particular, the paper focuses on the effect of the number of coupon tests and structural element tests on the final distribution of failure stress. The mean failure stress is assumed to be predicted by a failure criterion (e.g. Tsai-Wu), and the initial distribution of this mean failure stress

Erdem Acar; Raphael T. Haftka; Nam-Ho Kim; Deepti Buchi

113

RESEARCH REPORTS Paradoxical Effects of Testing  

E-print Network

RESEARCH REPORTS Paradoxical Effects of Testing: Retrieval Enhances Both Accurate Recall (RES). Here, we sought to test the generality of RES and to further elucidate its underlying mechanisms even when proactive interference played a minimal role. Keywords: testing effect, eyewitness memory

Chan, Jason C.K.

114

a New Category Stream Cipher Using Novel and Tested Pseudorandom Character Series with Dynamic Swapping  

NASA Astrophysics Data System (ADS)

This symmetric key algorithm and its implementation convert manually entered password into mathematical expression, which is further used to generate an infinitely non-repetitive sequence of presumably random characters. These random series of characters are used to encrypt the data. This encrypted data stream is in turn swapped by dividing the data, block by block and the size of the blocks keep changing from the beginning of the data to the end of the data. The swapping commences from the beginning of the encryption and proceeds. The size of the block for swapping is narrow compared to the full length of the data and entirely depends on the one of the earlier characters which has already got swapped away from its initial position. All the characters will be mapped uniquely to mathematical expressions of a set of parameters in a pool of 256 expressions. These expressions corresponding to all characters in a password are added together to obtain a resultant expression. The above mentioned expressions corresponding to each character are further modified in advance (before summing up together) by including a `position index'. This is inevitable to take care of the repetition of characters within a password and also in the case of a permutated password. In the case of permutated passwords, the random characters generated should be different in each case. In another words, each character and its position in the password have its own unique identity. Two pools of mathematical expressions are employed, coupled with different initiations to the parameters, to get a couple of pseudorandom character series, one's value being fed to the other. These are XORed together giving rise to a random series passing the popularly available randomness tests done by Nernst and Die hard. The initiating vector will be using, possibly the system time, and annexed with the original password to get the modified password. The system is similar to the conventional IV manipulation. The swapping will obviate substitution attack and the initiating vector method will prevent the possibility of reuse of key.

Muralee, Krishnan C. R.

2008-10-01

115

Evaluation of trommels for waste-to-energy plants: Phase 1 report of the Doncaster and Byker test series  

SciTech Connect

The performance testing of two commercial scale trommels, used for size separation of bulk municipal waste and the first phase of the testwork carried out are reported. The commercial scale trommels examined during this testwork are sited at Doncaster and at Byker. The major difference between the two plants is that raw refuse is processed in the Doncaster plant trommel and pulverised refuse in the Byker plant trommel. Both plants produce a magnetic ferrous fraction as well as a refuse derived fuel prepared by upgrading the intermediate sized product from the rotary screen using air classification, magnetic separation, further size reduction and pelletization. However, they differ in many respects; the feed to the Byker trommel is preshredded (-7'') while that at Doncaster is treated as received and the latter plant also has additional facilities for glass and paper recovery. The report provides detailed accounts of the Byker and Doncaster tests and compares the two screening operations highlighting the effects of the major variables investigated. These results highlight the current lack of understanding of trommel processes in that both series unequivocally demonstrate considerable errors in the design ratings assigned to each unit. Accordingly, the results of the Byker tests relate largely to overloaded conditions, particularly in the fine screen section, while those from the Doncaster tests represent conditions of considerable underloading.Valuable information relating to the effects of trommel speed, installation of lifters and scrolls, aperture size selection and mode of particle presentation to the screen plante has been reported in addition to the experience and methods of interpreting data resulting from the use of surrogate pulses. (MCW)

Barton, J.

1981-12-01

116

Patch test standard series recommended by the Brazilian Contact Dermatitis Study Group during the 2006-2011 period.  

PubMed

A retrospective study was carried out between 2006-2011. Six hundred and eighteen patients with suspected allergic contact dermatitis underwent the standard patch test series recommended by the Brazilian Contact Dermatitis Research Group. The aim of our study was to evaluate the variation of positive patch-test results from standard series year by year. The most frequently positive allergens were: nickel sulfate, thimerosal and potassium bichromate. Decrease of positive patch-test results over the years was statistically significant for: lanolin (p=0.01), neomycin (p=0.01) and anthraquinone (p=0.04). A follow-up study should be useful in determining which allergens could be excluded from standard series, as they may represent low sensitization risk. PMID:24474122

Duarte, Ida Alzira Gomes; Tanaka, Greta Merie; Suzuki, Nathalie Mie; Lazzarini, Rosana; Lopes, Andressa Sato de Aquino; Volpini, Beatrice Mussio Fornazier; Castro, Paulo Carrara de

2013-01-01

117

Patch test standard series recommended by the Brazilian Contact Dermatitis Study Group during the 2006-2011 period*  

PubMed Central

A retrospective study was carried out between 2006-2011. Six hundred and eighteen patients with suspected allergic contact dermatitis underwent the standard patch test series recommended by the Brazilian Contact Dermatitis Research Group. The aim of our study was to evaluate the variation of positive patch-test results from standard series year by year. The most frequently positive allergens were: nickel sulfate, thimerosal and potassium bichromate. Decrease of positive patch-test results over the years was statistically significant for: lanolin (p=0.01), neomycin (p=0.01) and anthraquinone (p=0.04). A follow-up study should be useful in determining which allergens could be excluded from standard series, as they may represent low sensitization risk. PMID:24474122

Duarte, Ida Alzira Gomes; Tanaka, Greta Merie; Suzuki, Nathalie Mie; Lazzarini, Rosana; Lopes, Andressa Sato de Aquino; Volpini, Beatrice Mussio Fornazier; de Castro, Paulo Carrara

2013-01-01

118

Forecasting volcanic air pollution in Hawaii: Tests of time series models  

NASA Astrophysics Data System (ADS)

Volcanic air pollution, known as vog (volcanic smog) has recently become a major issue in the Hawaiian islands. Vog is caused when volcanic gases react with oxygen and water vapor. It consists of a mixture of gases and aerosols, which include sulfur dioxide and other sulfates. The source of the volcanic gases is the continuing eruption of Mount Kilauea. This paper studies predicting vog using statistical methods. The data sets include time series for SO2 and SO4, over locations spanning the west, south and southeast coasts of Hawaii, and the city of Hilo. The forecasting models include regressions and neural networks, and a frequency domain algorithm. The most typical pattern for the SO2 data is for the frequency domain method to yield the most accurate forecasts over the first few hours, and at the 24 h horizon. The neural net places second. For the SO4 data, the results are less consistent. At two sites, the neural net generally yields the most accurate forecasts, except at the 1 and 24 h horizons, where the frequency domain technique wins narrowly. At one site, the neural net and the frequency domain algorithm yield comparable errors over the first 5 h, after which the neural net dominates. At the remaining site, the frequency domain method is more accurate over the first 4 h, after which the neural net achieves smaller errors. For all the series, the average errors are well within one standard deviation of the actual data at all the horizons. However, the errors also show irregular outliers. In essence, the models capture the central tendency of the data, but are less effective in predicting the extreme events.

Reikard, Gordon

2012-12-01

119

Metals Analysis Results for the Structural Qualification Test Series (SQTS) 01 - 05.  

SciTech Connect

Enclosed is the report summarizing the metals analysis results at the Contained Firing Facility (CFF), during SQTS 01 - 05. This metals analysis includes evaluation of a bulk dust and surface swipe sampling protocol during the testing series that obtained samples at 3 primary locations in the CFF chamber area. The sampling protocol for each of the bulk dust samples involves an assessment of the concentration for 20 different metals, the oxidation state of selected metals, a particle size selective analysis, and morphological information. In addition, surface swipes were taken during SQTS 05 on the equipment and personnel door frames to indicate the characteristics of airborne metals due to leakage past the gasket seals. The bulk dust metals analysis indicates a nearly complete conversion of the aluminum casing to an oxide form with an even split between spherical and non-spherical morphology. Size selective analysis shows 83% of the particulates are in the inhalable size range of less than 100 microns and 46% are in the respirable range of less than 10 microns. Combining metals analysis and leakage results indicate the potential for a problematic personal exposure to metals external to the chamber unless modifications are made. Please feel free to call me at 2-8904 if you have any questions or if I may be of further service.

Zalk, D

2006-04-11

120

Resolving pertussis immunity and vaccine effectiveness using incidence time series  

PubMed Central

Resolving the long-term, population-level consequence of vaccine-induced immunity to pertussis is a key challenge for control strategies and vaccine development. Controlled vaccine efficacy studies provide invaluable information; however, they are limited in scope by their sample size and follow-up duration. Long-term time series of incidence data collected by public health institutions provide insight at a broader scale, especially when the data are spatially explicit and age stratified. By using modern ecological and statistical methodolgies, which are reviewed in this paper, new insights into the duration of transmission-blocking immunity and the age-specific patterns of transmission can be gained. Recent advances in computing power and statistical software development will increasingly make these methods available to public health practitioners, vaccine developers and academics alike. PMID:23249232

Lavine, Jennie S; Rohani, Pejman

2013-01-01

121

A Testing Effect with Multimedia Learning  

ERIC Educational Resources Information Center

A testing effect occurs when a learner performs better on a retention test after studying the material and taking a practice-retention test than after studying the material twice. In the present study, 282 participants watched a narrated animation about lightning formation and then watched the presentation again (restudy), took a…

Johnson, Cheryl I.; Mayer, Richard E.

2009-01-01

122

A PERFORMANCE TEST OF TEACHING EFFECTIVENESS.  

ERIC Educational Resources Information Center

THIS REPORT DESCRIBES THE INITIAL VALIDATION OF PERFORMANCE TESTS OF TEACHER EFFECTIVENESS--USING PUPIL GAINS AS THE CRITERION OF EFFECTIVENESS--AND THE STEPS TAKEN IN RECOGNITION OF THE PROPRIETY OF SUCH MEASURES ONLY IF ALL TEACHERS ARE TEACHING FOR THE SAME OBJECTIVES. AS A FIRST STEP, IT WAS HYPOTHESIZED THAT A VALID PERFORMANCE TEST OF…

BAKER, EVA L.; POPHAM, V. JAMES

123

Single Event Effect (SEE) Test Planning 101  

NASA Technical Reports Server (NTRS)

This is a course on SEE Test Plan development. It is an introductory discussion of the items that go into planning an SEE test that should complement the SEE test methodology used. Material will only cover heavy ion SEE testing and not proton, LASER, or other though many of the discussed items may be applicable. While standards and guidelines for how-to perform single event effects (SEE) testing have existed almost since the first cyclotron testing, guidance on the development of SEE test plans has not been as easy to find. In this section of the short course, we attempt to rectify this lack. We consider the approach outlined here as a "living" document: mission specific constraints and new technology related issues always need to be taken into account. We note that we will use the term "test planning" in the context of those items being included in a test plan.

LaBel, Kenneth A.; Pellish, Jonathan; Berg, Melanie D.

2011-01-01

124

The Cost Effectiveness of Whole School Reforms. Urban Diversity Series.  

ERIC Educational Resources Information Center

This report examines issues related to the cost effectiveness of whole school reform. The first section discusses the development of whole school reform models, criteria for model adoption, and challenges of whole school reform for evaluation. The second section, "Comparing Effectiveness," looks at models for evaluation (experimental,…

Levin, Henry M.

125

77 FR 38280 - Final Test Guidelines; 810 Series 2000 Product Performance; Notice of Availability  

Federal Register 2010, 2011, 2012, 2013

...Recommendations. These final test guidelines address efficacy testing...water. B. How were these final test guidelines developed? The product...and Coordination and Policy's Web site: http://www.epa...scipoly/sap/index.htm. The test guidelines described in...

2012-06-27

126

Retrieval Mode Distinguishes the Testing Effect from the Generation Effect  

ERIC Educational Resources Information Center

A series of four experiments examined the effects of generation vs. retrieval practice on subsequent retention. Subjects were first exposed to a list of target words. Then the subjects were shown the targets again intact for Read trials or they were shown fragments of the targets. Subjects in Generate conditions were told to complete the fragments…

Karpicke, Jeffrey D.; Zaromb, Franklin M.

2010-01-01

127

Effective Pedagogy in Social Sciences. Educational Practices Series-23  

ERIC Educational Resources Information Center

This booklet is a synthesis of research on social sciences teaching that has been shown to have a positive effect on a range of desirable student outcomes: cognitive, skills, participatory and affective outcomes. Education in the social sciences plays an important role in developing students' sense of identity and influencing the ways in which…

Sinnema, Claire; Aitken, Graeme

2012-01-01

128

Effective Pedagogy in Mathematics. Educational Practices Series-19  

ERIC Educational Resources Information Center

This booklet focuses on effective mathematics teaching. Drawing on a wide range of research, it describes the kinds of pedagogical approaches that engage learners and lead to desirable outcomes. The aim of the booklet is to deepen the understanding of practitioners, teacher educators, and policy makers and assist them to optimize opportunities for…

Anthony, Glenda; Walshaw, Margaret

2009-01-01

129

Tests of N.A.C.A. airfoils in the variable density wind tunnel Series 44 and 64  

NASA Technical Reports Server (NTRS)

This note is one of a series covering an investigation of a number of related airfoils. It presents the results obtained from tests in the N.A.C.A. Variable Density Wind Tunnel of two groups of six airfoils each. One group, the 44 series, has a maximum mean camber of 4 percent of the chord at a position 0.4 of the chord behind the leading edge and the other group, the 64 series, has a maximum mean camber of 6 percent of the chord at the same position. The members within each group differ only in maximum thickness, the maximum thickness/chord ratios being: 0.06, 0.09, 0.12, 0.15, 0.18, and 0.21. The results are analyzed with a view to indicating the variation of the aerodynamic characteristics with profile thickness for airfoils having a certain mean camber line form.

Jacobs, Eastman N; Pinkerton, Robert M

1931-01-01

130

The effect of a series of organic cations upon the plasmalemmal serotonin transporter, SERT.  

PubMed

The aim of this work was to test the effect of a series of organic cations upon the activity of the plasma membrane serotonin transporter (SERT). The experiments were performed using the JAR cell line that constitutively expresses high levels of SERT, and rat intestine, whose mucosal epithelial cells also express SERT. Initial rates of (3)H-serotonin ((3)H-5HT; 200 nM) uptake were not changed by some of the organic cations tested (guanidine, N-methylnicotinamide, choline, atenolol, caffeine and theophylline), but were slightly (15-30%) inhibited by some other organic cations, at the highest concentrations tested (thiamine (3 mM), cimetidine (1 mM) and tetraethylammonium (3 mM)). On the other hand, some other organic cations reduced, in a concentration-dependent manner, uptake of (3)H-5HT by JAR cells (IC(50)s of 0.3, 1.3, 5.4, 89.3, 460 and 748 microM for quinidine, verapamil, propranolol, amiloride, nicotine and clonidine, respectively). Quinidine, clonidine and amiloride seem to be competitive inhibitors of (3)H-5HT uptake, whereas verapamil, nicotine and propranolol appear to be uncompetitive or non-competitive inhibitors. Moreover, quinidine, verapamil and propranolol trans-inhibited (3)H-5HT uptake, whereas clonidine, nicotine and amiloride were devoid of effect. Finally, these six organic cations were able to significantly increase the serosal-to-mucosal apparent permeability (P(app)) to (3)H-5HT of rat jejunum, ileum and colon. In conclusion, human and rat SERT-mediated transport is inhibited by several distinct organic cations, some of which are therapeutic agents or drugs of abuse. Knowledge on which organic cations interfere with SERT-mediated transport of 5HT will have major implications in tissues where 5HT plays important physiological roles (eg. central nervous system, intestine and placenta). PMID:15501483

Keating, E; Lemos, C; Monteiro, R; Azevedo, I; Martel, F

2004-11-19

131

Random Test Run Length and Effectiveness  

NASA Technical Reports Server (NTRS)

A poorly understood but important factor in many applications of random testing is the selection of a maximum length for test runs. Given a limited time for testing, it is seldom clear whether executing a small number of long runs or a large number of short runs maximizes utility. It is generally expected that longer runs are more likely to expose failures -- which is certainly true with respect to runs shorter than the shortest failing trace. However, longer runs produce longer failing traces, requiring more effort from humans in debugging or more resources for automated minimization. In testing with feedback, increasing ranges for parameters may also cause the probability of failure to decrease in longer runs. We show that the choice of test length dramatically impacts the effectiveness of random testing, and that the patterns observed in simple models and predicted by analysis are useful in understanding effects observed.

Andrews, James H.; Groce, Alex; Weston, Melissa; Xu, Ru-Gang

2008-01-01

132

Modular Cognitive Behavioral Therapy for Youth Anxiety Disorders: A Partial Effectiveness Test in Schools  

ERIC Educational Resources Information Center

The current study used a programmatic dissemination model as a guiding framework for testing an evidence-supported treatment (EST) for child anxiety disorders in the school setting. The main goal of the project was to conduct the first of a planned series of partial-effectiveness tests (group-design randomized controlled trials) evaluating the…

Chiu, Angela Wai Mon

2010-01-01

133

Advanced CMOS Radiation Effects Testing Analysis  

NASA Technical Reports Server (NTRS)

Presentation at the annual NASA Electronic Parts and Packaging (NEPP) Program Electronic Technology Workshop (ETW). The material includes an update of progress in this NEPP task area over the past year, which includes testing, evaluation, and analysis of radiation effects data on the IBM 32 nm silicon-on-insulator (SOI) complementary metal oxide semiconductor (CMOS) process. The testing was conducted using test vehicles supplied by directly by IBM.

Pellish, Jonathan Allen; Marshall, Paul W.; Rodbell, Kenneth P.; Gordon, Michael S.; LaBel, Kenneth A.; Schwank, James R.; Dodds, Nathaniel A.; Castaneda, Carlos M.; Berg, Melanie D.; Kim, Hak S.; Phan, Anthony M.; Seidleck, Christina M.

2014-01-01

134

Advanced CMOS Radiation Effects Testing and Analysis  

NASA Technical Reports Server (NTRS)

Presentation at the annual NASA Electronic Parts and Packaging (NEPP) Program Electronic Technology Workshop (ETW). The material includes an update of progress in this NEPP task area over the past year, which includes testing, evaluation, and analysis of radiation effects data on the IBM 32 nm silicon-on-insulator (SOI) complementary metal oxide semiconductor (CMOS) process. The testing was conducted using test vehicles supplied by directly by IBM.

Pellish, J. A.; Marshall, P. W.; Rodbell, K. P.; Gordon, M. S.; LaBel, K. A.; Schwank, J. R.; Dodds, N. A.; Castaneda, C. M.; Berg, M. D.; Kim, H. S.; Phan, A. M.; Seidleck, C. M.

2014-01-01

135

Software partitioning for effective automated unit testing  

Microsoft Academic Search

A key problem for effective unit testing is the difficulty of partitioning large software systems into appropriate units that can be tested in isolation. We present an approach that identifies control and data inter-dependencies between soft- ware components using static program analysis, and divides the source code into units where highly-intertwined compo- nents are grouped together. Those units can then

Arindam Chakrabarti; Patrice Godefroid

2006-01-01

136

Effects of acetyl-DL-leucine in patients with cerebellar ataxia: a case series.  

PubMed

No existing medication has yet been shown to convincingly improve cerebellar ataxia. Therefore, the identification of new drugs for its symptomatic treatment is desirable. The objective of this case series was to evaluate the efficacy of treatment of cerebellar ataxia with the amino acid acetyl-DL-leucine (Tanganil). Thirteen patients (eight males, median age 51 years) with degenerative cerebellar ataxia of different etiologies (SCA1/2, ADCA, AOA, SAOA) were treated with acetyl-DL-leucine (5 g/day) without titration for 1 week. Motor function was evaluated by changes in the Scale for the Rating and Assessment of Ataxia (SARA) and in the Spinocerebellar Ataxia Functional Index (SCAFI) during treatment compared to a baseline examination. Quality of life (EuroQol-5D-3L) and side effects were also assessed. Mean total SARA decreased remarkably (p = 0.002) from a baseline of 16.1 ± 7.1 to 12.8 ± 6.8 (mean ± SD) on medication. There were also significant improvements in sub-scores for gait (p = 0.022), speech (p = 0.007), finger-chase (p = 0.042), nose-finger-test (p = 0.035), rapid-alternating-movements (p = 0.002) and heel-to-shin (p = 0.018). Furthermore, patients showed better performance in the SCAFI consisting of the 8-m-walking-time (8 MW, p = 0.003), 9-Hole-Peg-Test of the dominant hand (9HPTD, p = 0.011) and the PATA rate (p = 0.005). Quality of life increased during treatment (p = 0.003). No side effects were reported. In conclusion, acetyl-DL-leucine significantly improved ataxic symptoms without side effects and therefore showed a good risk-benefit profile. These findings need to be confirmed in placebo-controlled trials. PMID:23835634

Strupp, Michael; Teufel, Julian; Habs, Maximilian; Feuerecker, Regina; Muth, Carolin; van de Warrenburg, Bart P; Klopstock, Thomas; Feil, Katharina

2013-10-01

137

Tide effects removed from well tests  

SciTech Connect

To avoid distorted data when analyzing well pressure tests of permeable offshore reservoirs, one needs to account for periodic ocean tidal stress. Quartz-crystal bottom hole pressure recorders provide a high resolution of reservoir pressure but also measures pressure fluctuations from tidal effects during well testing. Periodic oscillations in the reservoir pressure are due to the three mechanisms: solid earth tide; barometric tide/effect; and ocean tide. The paper uses sample data from an offshore reservoir to illustrate how tide effects can be identified in the data and the correction procedure to use to remove these effects.

Aase, E.P.B.; Jelmert, T.A. [Norwegian Inst. of Technology, Trondeim (Norway); Vik, S.A. [Saga Petroleum A.S., Sandvika (Norway)

1995-05-01

138

The Effects of Brief Hypnotherapy in a Series of Psychosomatic Problems  

Microsoft Academic Search

The use of hypnosis on its own or in association with other treatment procedures produced improvement, subjectively and\\/or objectively, in 17 of a series of 50 patients suffering from a variety of psychosomatic problems. All 50 patients were tested for trance capacity. When this was present to any reasonable degree, the patients were immediately instructed in how to induce the

F. H. Frankel

1973-01-01

139

Interpreting the Macroeconomic Time Series Facts: The Effects of Monetary Policy  

Microsoft Academic Search

Existing theory and evidence on the effects of monetary policy are reviewed. Substantial room for disagreement among economists remains. New evidence, based on multivariate time series studies of several countries, is presented. While certain patterns in the data consistent with effective monetary policy are strikingly similar across countries, others, particularly the tendency of interest rate increases to predict high inflation,

Christopher A. Sims

1992-01-01

140

Optical Kerr effect in viscous media: I. The homologous series of polyoxyethylenediols  

Microsoft Academic Search

Results of temperature dependence of the optical Kerr effect in a series of homologous polyoxyethylenediols are presented. The molecular Kerr constant was found to increase with growing molecular weight of a polydiol. The temperature dependence ofthe optical Kerr effect clearly indicates the influence of viscosity in these media.

Zdzislaw Blaszczak; Marek Halas; Waleed el Shirbeeny; Ewa Andrzejewska; Maciej Andrzejewski

2000-01-01

141

Development, testing, and certification of the Northrup, Inc., ML series concentrating solar collector model NSC-01-0732  

NASA Technical Reports Server (NTRS)

A summary is presented of the additional development work on the existing ML Series concentrating solar collector for use with solar heating and cooling systems. The report discusses the intended use of the final report, describes the development hardware, lists deliverable end items, deals with problems encountered during fabrication and testing, and includes certification statements of performance. This report shows that the products developed are marketable and suitable for public use.

Parker, J. C.

1979-01-01

142

Eliminating access to anonymous HIV antibody testing in North Carolina: effects on HIV testing and partner notification.  

PubMed

Anonymous HIV testing may attract persons who might otherwise not be tested but may hinder partner notification. We evaluated the effects on North Carolina's HIV testing and partner notification programs of policy changes that eliminated and later restored anonymous testing in 82 counties. We used an interrupted time-series design to compare counties eliminating with counties retaining anonymous testing. We analyzed HIV testing and partner notification data from before, during, and after elimination of anonymous testing. After elimination of anonymous testing in 82 counties, the mean monthly level of testing (+/- SE) increased by 45%, or 548 (+/- 123) tests per month, while in 18 counties that retained anonymous testing, there was a 63% increase, or 802 (+/- 162) tests per month (p > .05). Among men of all races, testing increased by 16%, or 155 (+/- 35) tests per month, in counties that eliminated anonymous testing; and by 51%, or 305 (+/- 42) tests per month (p < .05), in counties that retained anonymous testing. After elimination of anonymous testing, both county types experienced similar increases in the rate of partners notified. However, partner notification was more successful if the index patient was tested confidentially; 2.7 times as many partners per index patient were notified and counseled. There was no effect on testing or on partner notification rates following restoration of anonymous testing. Substantial community opposition to eliminating anonymous testing was encountered. The policy change appeared to result in a slight decrease in testing among men and a slight increase in partners notified. Programs considering the elimination of anonymous testing should weigh these potential gains and losses, as well as the impact on relationships between the public health and advocacy communities PMID:9117462

Kassler, W J; Meriwether, R A; Klimko, T B; Peterman, T A; Zaidi, A

1997-03-01

143

Penalized Maximal F Test for Detecting Change Points of Temperature and Wind Speed Data Series  

Microsoft Academic Search

The homogeneity of the climate record continues to receive considerable attention. Time series are commonly contaminated by non-climatic discontinuities that result from station relocations, observation time changes, and station specific trends related to environmental changes in the proximity of the observation sites. Several statistical methods have been proposed for detecting undocumented shifts. Wang Xiaolan et al. proposed the penalized maximal

L. Cao; X. Liu; Q. Li

2009-01-01

144

Standard test method for determining the susceptibility to intergranular corrosion of 5XXX series Aluminum alloys by mass loss after exposure to nitric acid (NAMLT Test)  

E-print Network

1.1 This test method describes a procedure for constant immersion intergranular corrosion testing of 5XXX series aluminum alloys. 1.2 This test method is applicable only to wrought products. 1.3 This test method covers type of specimen, specimen preparation, test environment, and method of exposure. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

American Society for Testing and Materials. Philadelphia

2004-01-01

145

Test results and initial operating experience for the BPA 500 kV thyristor controlled series capacitor-modulation, SSR and performance monitoring  

SciTech Connect

Field experience is reported for a thyristor controlled series capacitor (TCSC) recently commissioned at BPA`s Slatt substation. Subsynchronous resonance tests show that TCSC interactions with shaft dynamics of PGE`s Boardman steam generator are well understood and are effectively avoided by normal TCSC valve firing logic. Modulation tests, performed with the Boardman plant off line, show that the TCSC can be a powerful and responsive actuator for swing damping. Security considerations did not permit lightly damped operation of the controlled plant. Close analysis indicates that the TCSC damping contribution, though small, was measurable. The best estimate is that damping for the McNary mode is 7.33% and 8.55%, for the TCSC damper loop open and closed respectively. TCSC testing and monitoring is facilitated by an advanced interactive measurement network representing BPA`s approach to the information requirements of major control systems.

Hauer, J.F. [Pacific Northwest Lab., Richland, WA (United States); Mittelstad, W.A. [Bonneville Power Administration, Portland, OR (United States); Piwko, R.J. Sr. [General Electric Co., Schenectady, NY (United States)] [and others

1995-12-31

146

77 FR 15750 - Final Test Guidelines; OCSPP 810 Series; Notice of Availability  

Federal Register 2010, 2011, 2012, 2013

...recommendations described in the test guidelines may be proposed...case-by-case basis. IV. How were these test guidelines developed? The product...and Coordination and Policy's Web site at http://www.epa...scipoly/sap/index.htm. The test guidelines were also...

2012-03-16

147

A new series of diarylamides possessing quinoline nucleus: Synthesis, in vitro anticancer activities, and kinase inhibitory effect.  

PubMed

Synthesis of a new series of diarylamides possessing 6,7-dimethoxy(dihydroxy)quinoline scaffold is described. Their in vitro antiproliferative activities against NCI-58 human cancer cell lines of nine different cancer types were tested. Compounds 1a and 1d-g showed the highest mean %inhibition values over the 58 cell line panel at 10 ?M, and they were further tested in 5-dose testing mode to determine their IC50 values. The five compounds were more potent than Imatinib against all the cell lines of nine different cancer types. Compound 1g showed the highest potencies. It showed inhibitory effect against C-RAF kinase (76.65% at 10 ?M concentration). PMID:25282271

El-Gamal, Mohammed I; Khan, Mohammad Ashrafuddin; Abdel-Maksoud, Mohammed S; Gamal El-Din, Mahmoud M; Oh, Chang-Hyun

2014-11-24

148

Results from Nevada Nuclear Waste Storage Investigations (NNWSI) Series 3 spent fuel dissolution tests  

SciTech Connect

The dissolution and radionuclide release behavior of spent fuel in groundwater is being studied by the Yucca Mountain Project (YMP), formerly the Nevada Nuclear Waste Storage Investigations (NNWSI) Project. Specimens prepared from pressurized water reactor fuel rod segments were tested in sealed stainless steel vessels in Nevada Test Site J-13 well water at 85{degree}C and 25{degree}C. The test matrix included three specimens of bare-fuel particles plus cladding hulls, two fuel rod segments with artificially defected cladding and water-tight end fittings, and an undefected fuel rod section with watertight end fittings. Periodic solution samples were taken during test cycles with the sample volumes replenished with fresh J-13 water. Test cycles were periodically terminated and the specimens restarted in fresh J-13 water. The specimens were run for three cycles for a total test duration of 15 months. 22 refs., 32 figs., 26 tabs.

Wilson, C.N.

1990-06-01

149

Effects of Laser Wavelength on Ablator Testing  

NASA Technical Reports Server (NTRS)

Wavelength-dependent or spectral radiation effects are potentially significant for thermal protection materials. NASA atmospheric entry simulations include trajectories with significant levels of shock layer radiation which is concentrated in narrow spectral lines. Tests using two different high powered lasers, the 10.6 micron LHMEL I CO2 laser and the near-infrared 1.07 micron fiber laser, on low density ablative thermal protection materials offer a unique opportunity to evaluate spectral effects. Test results indicated that the laser wavelength can impact the thermal response of an ablative material, in terms of bond-line temperatures, penetration times, mass losses, and char layer thicknesses.

White, Susan M.

2014-01-01

150

Advances in Educational and Psychological Testing: Theory and Applications. Evaluation in Education and Human Services Series.  

ERIC Educational Resources Information Center

The 14 chapters of this book focus on the technical advances, advances in applied settings, and emerging topics in the testing field. Part 1 discusses methodological advances, Part 2 considers developments in applied settings, and Part 3 reviews emerging topics in the field of testing. Part 1 papers include: (1) "Advances in Criterion-Referenced…

Hambleton, Ronald K., Ed.; Zaal, Jac N., Ed.

151

Performance Testing: Issues Facing Vocational Education. Research and Development Series No. 190.  

ERIC Educational Resources Information Center

Addressing issues facing vocational education on the topic of performance testing, this handbook consists of a collection of seventeen commissioned papers and reactions to the papers. Two papers are presented on each of the following types of issues that must be considered before a performance test can be constructed: philosophical, technical,…

Spirer, Janet E., Ed.

152

Statistical Considerations in Choosing a Test Reliability Coefficient. ACT Research Report Series, 2012 (10)  

ERIC Educational Resources Information Center

The purpose of this paper is to illustrate alpha's robustness and usefulness, using actual and simulated educational test data. The sampling properties of alpha are compared with the sampling properties of several other reliability coefficients: Guttman's lambda[subscript 2], lambda[subscript 4], and lambda[subscript 6]; test-retest reliability;…

Woodruff, David; Wu, Yi-Fang

2012-01-01

153

Planning, Instruction, and Assessment: Effective Teaching Practices. James H. Stronge Research-to-Practice Series  

ERIC Educational Resources Information Center

This entry in the James H. Stronge Research-to-Practice Series focuses on specific strategies teachers can use to improve the quality of their instruction. Studies have shown teacher quality to be the top indicator of student achievement, with the effects of good teachers apparent even as students move on to successive grades. In this book, Grant,…

Grant, Leslie W.; Hindman, Jennifer; Stronge, James H.

2010-01-01

154

Havemeyer Foundation Monograph Series No. 21 METABOLIC EFFECTS ON THE REPRODUCTIVE  

E-print Network

15 Havemeyer Foundation Monograph Series No. 21 METABOLIC EFFECTS ON THE REPRODUCTIVE TRACT of maintaining an annual calving interval. Pregnancy must therefore be initiated while the animal is concurrently. Failure to establish a pregnancy is the main reason for involuntary culling and calving rates to a single

Burn, Charlotte

155

Autocorrelation Effects on Least-Squares Intervention Analysis of Short Time Series.  

ERIC Educational Resources Information Center

Clarifies several issues regarding the effects of autocorrelated errors on Type I error in ordinary least-squares models. Demonstrates through Monte Carlo simulation the conditions under which distortion in Type I error is less than predicted by asymptotic theory. Suggests a recently developed small-sample method for time-series analyses. (SLD)

Huitema, Bradley E.; McKean, Joseph W.; McKnight, Scott

1999-01-01

156

ECOS Inquiries Series -University of Montana Effect of Acid Rain on the Ability of  

E-print Network

1 ECOS Inquiries Series - University of Montana Effect of Acid Rain on the Ability of Soil Microbes OF ACID RAIN ON THE ABILITY OF SOIL MICROBES TO DECOMPOSE ORGANIC NITROGEN 3. GOALS AND OBJECTIVES: a ecosystems. One well known example of this is the production of acid rain due to certain air pollutants

Brewer, Carol

157

A generalized Grubbs-Beck test statistic for detecting multiple potentially influential low outliers in flood series  

USGS Publications Warehouse

he Grubbs-Beck test is recommended by the federal guidelines for detection of low outliers in flood flow frequency computation in the United States. This paper presents a generalization of the Grubbs-Beck test for normal data (similar to the Rosner (1983) test; see also Spencer and McCuen (1996)) that can provide a consistent standard for identifying multiple potentially influential low flows. In cases where low outliers have been identified, they can be represented as “less-than” values, and a frequency distribution can be developed using censored-data statistical techniques, such as the Expected Moments Algorithm. This approach can improve the fit of the right-hand tail of a frequency distribution and provide protection from lack-of-fit due to unimportant but potentially influential low flows (PILFs) in a flood series, thus making the flood frequency analysis procedure more robust.

Cohn, T.A.; England, J.F.; Berenbrock, C.E.; Mason, R.R.; Stedinger, J.R.; Lamontagne, J.R.

2013-01-01

158

The NASA atomic oxygen effects test program  

NASA Technical Reports Server (NTRS)

The NASA Atomic Oxygen Effects Test Program was established to compare the low earth orbital simulation characteristics of existing atomic oxygen test facilities and utilize the collective data from a multitude of simulation facilities to promote understanding of mechanisms and erosion yield dependence upon energy, flux, metastables, charge, and environmental species. Four materials chosen for this evaluation include Kapton HN polyimide, FEP Teflon, polyethylene, and graphite single crystals. The conditions and results of atomic oxygen exposure of these materials is reported by the participating organizations and then assembled to identify degrees of dependency of erosion yields that may not be observable from any single atomic oxygen low earth orbital simulation facility. To date, the program includes 30 test facilities. Characteristics of the participating test facilities and results to date are reported.

Banks, Bruce A.; Rutledge, Sharon K.; Brady, Joyce A.

1988-01-01

159

Testing for a Unit Root in Time Series With Pretest Data-Based Model Selection  

Microsoft Academic Search

In this article we examine the impact of data-based lag-length estimation on the behavior of the augmented Dickey–Fuller (ADF) test for a unit root. We derive conditions under which the ADF test converges to the distribution tabulated by Dickey and Fuller and verify that these conditions are satisfied by several commonly employed lag-selection strategies. Simulation evidence indicates that the performance

Alastair R Hall

1994-01-01

160

Multistage Adaptive Testing for a Large-Scale Classification Test: Design, Heuristic Assembly, and Comparison with Other Testing Modes. ACT Research Report Series, 2012 (6)  

ERIC Educational Resources Information Center

Multistage adaptive tests (MSTs) have gained increasing popularity in recent years. MST is a balanced compromise between linear test forms (i.e., paper-and-pencil testing and computer-based testing) and traditional item-level computer-adaptive testing (CAT). It combines the advantages of both. On one hand, MST is adaptive (and therefore more…

Zheng, Yi; Nozawa, Yuki; Gao, Xiaohong; Chang, Hua-Hua

2012-01-01

161

Pressure Distribution Tests on a Series of Clark Y Biplane Cellules with Special Reference to Stability  

NASA Technical Reports Server (NTRS)

The pressure distribution data discussed in this report represents the results of part of an investigation conducted on the factors affecting the aerodynamic safety of airplanes. The present tests were made on semispan, circular-tipped Clark Y airfoil models mounted in the conventional manner on a separation plane. Pressure readings were made simultaneously at all test orifices at each of 20 angles of attack between -8 degrees and +90 degrees. The results of the tests on each wing arrangement are compared on the bases of maximum normal force coefficient, lateral stability at a low rate of roll, and relative longitudinal stability. Tabular data are also presented giving the center of pressure location of each wing.

Noyes, Richard W

1933-01-01

162

Wind Tunnel Pressure Distribution Tests on a Series of Biplane Wing Models  

NASA Technical Reports Server (NTRS)

This report is on the changes in forces on each wing of a biplane cellule when either the stagger or the gap is varied. Since each test was carried up to a 90 degree angle of attack, the results may be used in the study of stalled flight and of spinning as well as in the structural design of biplane wings.

Knight, Montgomery; Noyes, Richard

1929-01-01

163

Validity Evidence for ACT Compass® Placement Tests. ACT Research Report Series 2014 (2)  

ERIC Educational Resources Information Center

We examined the validity of using Compass® test scores and high school grade point average (GPA) for placing students in first-year college courses and for identifying students at risk of not succeeding. Consistent with other research, the combination of high school GPA and Compass scores performed better than either measure used alone. Results…

Westrick, Paul A.; Allen, Jeff

2014-01-01

164

Urine Testing for Drugs of Abuse. NIDA Research Monograph Series 73.  

ERIC Educational Resources Information Center

In the past 5 years, a growing concern over the use of illicit drugs in the workplace has led to an interest in urinalysis as a way to detect and deter drug use. This monograph provides information that will assist those involved in the planning or implementation of drug testing programs in making informed choices. Articles include: (1)…

Hawks, Richard L., Ed.; Chiang, C. Nora, Ed.

165

The Impact of Test Suite Granularity on the CostEffectiveness of Regression Testing  

E-print Network

The Impact of Test Suite Granularity on the Cost­Effectiveness of Regression Testing Gregg,pkallakug@cse.unl.edu ABSTRACT Regression testing is an expensive testing process used to validate software following modifications. The cost­effective­ ness of regression testing techniques varies with characteris­ tics of test

Rothermel, Gregg

166

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence  

PubMed Central

The distributional patterns of actively moving animals are influenced by the cues that the individuals use for choosing sites into which they settle. Individuals may gather information about habitat quality using two types of strategies, either directly assessing the relevant environmental factors, or using the presence of conspecifics or heterospecifics as an indirect measure of habitat quality. We examined patterns of heterospecific attraction with observational time-series data on a community of seven waterbird species breeding in artificial irrigation ponds. We fitted to the data a multivariate logistic regression model, which attributes the presence–absence of each species to a set of environmental and spatial covariates, to the presence of con- and heterospecifics in the previous year and to the presence of heterospecifics in the same year. All species showed a clear tendency to continue breeding in the same sites where they were observed in the previous year. Additionally, the presence of heterospecifics, both in the previous year and in the same year, generally increased the probability that the focal species was found breeding on a given pond. Our data thus give support for the heterospecific attraction hypothesis, though causal inference should be confirmed with manipulative experiments. PMID:20462909

Sebastián-González, Esther; Sánchez-Zapata, José Antonio; Botella, Francisco; Ovaskainen, Otso

2010-01-01

167

Improving the Effectiveness of Content Popularity Prediction Methods using Time Series Trends  

E-print Network

We here present a simple and effective model to predict the popularity of web content. Our solution, which is the winner of two of the three tasks of the ECML/PKDD 2014 Predictive Analytics Challenge, aims at predicting user engagement metrics, such as number of visits and social network engagement, that a web page will achieve 48 hours after its upload, using only information available in the first hour after upload. Our model is based on two steps. We first use time series clustering techniques to extract common temporal trends of content popularity. Next, we use linear regression models, exploiting as predictors both content features (e.g., numbers of visits and mentions on online social networks) and metrics that capture the distance between the popularity time series to the trends extracted in the first step. We discuss why this model is effective and show its gains over state of the art alternatives.

Figueiredo, Flavio; Almeida, Jussara M

2014-01-01

168

Modelling the neurovascular habituation effect on fMRI time series  

Microsoft Academic Search

In this paper, a novel non-stationary model of functional Magnetic Resonance Imaging (fMRI) time series is proposed. It allows us to account for some putative habituation effect arising in event-related fMRI paradigms that involves the so-called repetition-suppression phenomenon and induces decreasing magnitude responses over successive trials. Akin to , this model is defined over functionnally homogeneous regions-of-interest (ROIs) and embedded

Philippe Ciuciu; Stéphane Sockeel; Thomas Vincent; Jérôme Idier

2009-01-01

169

Analysis of Spin-dependent Peltier Effect: Spin Valves Connected in Series  

NASA Astrophysics Data System (ADS)

Recently, it has been shown in the framework of Spin Caloritronics that due to spin-dependent Peltier effect appears a temperature gradient due to spin current. In this study, we focus in the analysis of spin valves, when two or more of these nanostructures are connected in series to enhance Heat flux in the thermopile system. The temperature distribution in the system is calculated. Additionally, temperature gradient generated by spin current is determined.

Juarez-Acosta, Isaac; Olivares-Robles, Miguel Angel

2013-03-01

170

Single-Event Transient Testing of Low Dropout PNP Series Linear Voltage Regulators  

NASA Technical Reports Server (NTRS)

As demand for high-speed, on-board, digital-processing integrated circuits on spacecraft increases (field-programmable gate arrays and digital signal processors in particular), the need for the next generation point-of-load (POL) regulator becomes a prominent design issue. Shrinking process nodes have resulted in core rails dropping to values close to 1.0 V, drastically reducing margin to standard switching converters or regulators that power digital ICs. The goal of this task is to perform SET characterization of several commercial POL converters, and provide a discussion of the impact of these results to state-of-the-art digital processing IC through laser and heavy ion testing

Adell, Philippe; Allen, Gregory

2013-01-01

171

Effects of State Tests on Classroom Test Items in Mathematics  

ERIC Educational Resources Information Center

Classroom tests from nine eighth-grade mathematics teachers were collected from the 2003-04 and 2005-06 school years. These years represent one school year prior to the eighth-grade Ohio Achievement Test (OAT) in mathematics being implemented and the year after the eighth-grade OAT in mathematics was implemented, respectively. In addition,…

Boyd, Brian T.

2008-01-01

172

Multiple Choice Testing and the Retrieval Hypothesis of the Testing Effect  

ERIC Educational Resources Information Center

Taking a test often leads to enhanced later memory for the tested information, a phenomenon known as the "testing effect". This memory advantage has been reliably demonstrated with recall tests but not multiple choice tests. One potential explanation for this finding is that multiple choice tests do not rely on retrieval processes to the same…

Sensenig, Amanda E.

2010-01-01

173

The Impact of Test Suite Granularity on the CostEffectiveness of Regression Testing  

E-print Network

The Impact of Test Suite Granularity on the Cost­Effectiveness of Regression Testing Gregg,pkallakug@cse.unl.edu ABSTRACT Regression testing is an expensive testing process used to validate software following modi#12;cations. The cost-e#11;ective- ness of regression testing techniques varies with characteris- tics of test

Rothermel, Gregg

174

The Impact of Test Suite Granularity on the Cost-Effectiveness of Regression Testing  

E-print Network

The Impact of Test Suite Granularity on the Cost-Effectiveness of Regression Testing Gregg,pkallakug@cse.unl.edu ABSTRACT Regression testing is an expensive testing process used to validate software following modi cations. The cost-e ective- ness of regression testing techniques varies with characteris- tics of test

Rothermel, Gregg

175

Testing & Research, Part I. Options in Education: Program Transcripts of a Weekly Series Broadcast by Member Stations of National Public Radio. Program No. 78.  

ERIC Educational Resources Information Center

Several program transcripts on educational testing from the National Public Radio series, Options in Education, are included in this pamphlet. In "The I.Q. Controversy," Ned Block discusses culturally biased standardized tests. Dr. Harold Hodgkinson, former Director of the National Institute of Education, and Noel Epstein, Education Editor of the…

George Washington Univ., Washington, DC. Inst. for Educational Leadership.

176

Thermal Measurements from a Series of Tests with a Large Cylindrical Calorimeter on the Leeward Edge of a JP-8 Pool Fire in Cross-Flow  

SciTech Connect

As part of the full scale fuel fire experimental program, a series of JP-8 pool fire experiments with a large cylindrical calorimeter (3.66 m diameter), representing a C-141 aircraft fuselage, at the lee end of the fuel pool were performed at Naval Air Warfare Center, Weapons Division (NAWCWPNS). The series was designed to support Weapon System Safety Assessment (WSSA) needs by addressing the case of a transport aircraft subjected to a large fuel fire. The data collected from this mock series will allow for characterization of the fire environment via a survivable test fixture. This characterization will provide important background information for a future test series utilizing the same fuel pool with an actual C-141 aircraft in place of the cylindrical calorimeter.

SUO-ANTTILA,JILL M.; GRITZO,LOUIS A.

2001-07-01

177

The "Volvo Effect"--Questioning Standardized Tests.  

ERIC Educational Resources Information Center

Questions current emphasis on standardized tests and discusses several factors about the tests that should prompt reevaluation of their usefulness. Issues discussed include: development and design of standardized tests; the correlation between test scores and socioeconomic position; the discrepancy between test designs and accurate reflection of…

Wesson, Kenneth A.

2001-01-01

178

Power Series Introduction  

E-print Network

Power Series 16.4 Introduction In this section we consider power series. These are examples of infinite series where each term contains a variable, x, raised to a positive integer power. We use the ratio test to obtain the radius of convergence R, of the power series and state the important result

Vickers, James

179

Testing and Merging Information for Effect Size Estimation  

Microsoft Academic Search

A large-sample test for testing the equality of two effect sizes is presented. The null and non-null distributions of the proposed test statistic are derived. Further, the problem of estimating the effect size is considered when it is a priori suspected that two effect sizes may be close to each other. The combined data from all the samples leads to

Noriah M. Al-Kandari; Sana S. Buhamra; S. E. Ahmed

2007-01-01

180

Leadership Effectiveness. ACSA School Management Digest, Series 1, No. 16. ERIC/CEM Research Analysis Series Number 44.  

ERIC Educational Resources Information Center

Many educational administrators are too overwhelmed by paperwork and too short of time, resources, and training, to be effective leaders. Yet some educators and schools are finding ways to make good leadership easier through improving time management skills, providing assistants, instituting administrative training programs, and cutting paperwork.…

Mazzarella, Jo Ann

181

Downflow dryout in a heated ribbed vertical annulus with a cosine power profile (Results from test series ECS-2, WSR, and ECS-2cE)  

SciTech Connect

Experiments designed to investigate surface dryout in a heated, ribbed annulus test section simulating one of the annular coolant channels of a Savannah River Plant production reactor Mark 22 fuel assembly have been conducted at the Idaho National Engineering Laboratory. The inner surface of the annulus was constructed of aluminum and was electrically heated to provide an axial cosine power profile and a flat azimuthal power shape. Data presented in this report are from the ECS-2, WSR, and ECS-2cE series of tests. These experiments were conducted to examine the onset of wall thermal excursion for a range of flow, inlet fluid temperature, and annulus outlet pressure. Hydraulic boundary conditions on the test section represent flowrates (0.1--1.4 1/s), inlet fluid temperatures (293--345 K), and outlet pressures (-18--139.7 cm of water relative to the bottom of the heated length (61--200 cm of water relative to the bottom of the lower plenum)) expected to occur during the Emergency Coolant System (ECS) phase of postulated Loss-of-Coolant Accident in a production reactor. The onset of thermal excursion based on the present data is consistent with data gathered in test rigs with flat axial power profiles. The data indicate that wall dryout is primarily a function of liquid superficial velocity. Air entrainment rate was observed to be a strong function of the boundary conditions (primarily flowrate and liquid temperature), but had a minor effect on the power at the onset of thermal excursion for the range of conditions examined. 14 refs., 33 figs., 13 tabs.

Larson, T.K.; Anderson, J.L.; Condie, K.G.

1990-12-01

182

Assessments of higher-order ionospheric effects on GPS coordinate time series: A case study of CMONOC with longer time series  

NASA Astrophysics Data System (ADS)

Higher-order ionospheric (HIO) corrections are proposed to become a standard part for precise GPS data analysis. For this study, we deeply investigate the impacts of the HIO corrections on the coordinate time series by implementing re-processing of the GPS data from Crustal Movement Observation Network of China (CMONOC). Nearly 13 year data are used in our three processing runs: (a) run NO, without HOI corrections, (b) run IG, both second- and third-order corrections are modeled using the International Geomagnetic Reference Field 11 (IGRF11) to model the magnetic field, (c) run ID, the same with IG but dipole magnetic model are applied. Both spectral analysis and noise analysis are adopted to investigate these effects. Results show that for CMONOC stations, HIO corrections are found to have brought an overall improvement. After the corrections are applied, the noise amplitudes decrease, with the white noise amplitudes showing a more remarkable variation. Low-latitude sites are more affected. For different coordinate components, the impacts vary. The results of an analysis of stacked periodograms show that there is a good match between the seasonal amplitudes and the HOI corrections, and the observed variations in the coordinate time series are related to HOI effects. HOI delays partially explain the seasonal amplitudes in the coordinate time series, especially for the U component. The annual amplitudes for all components are decreased for over one-half of the selected CMONOC sites. Additionally, the semi-annual amplitudes for the sites are much more strongly affected by the corrections. However, when diplole model is used, the results are not as optimistic as IGRF model. Analysis of dipole model indicate that HIO delay lead to the increase of noise amplitudes, and that HIO delays with dipole model can generate false periodic signals. When dipole model are used in modeling HIO terms, larger residual and noise are brought in rather than the effective improvements.

Jiang, Weiping; Deng, Liansheng; Zhou, Xiaohui; Ma, Yifang

2014-05-01

183

Effect of nitrogen and fluorine on mechanical properties and bioactivity in two series of bioactive glasses.  

PubMed

Bioactive glasses are able to bond to bone through formation of carbonated hydroxyapatite in body fluids, and fluoride-releasing bioactive glasses are of interest for both orthopaedic and, in particular, dental applications for caries inhibition. However, because of their poor strength their use is restricted to non-load-bearing applications. In order to increase their mechanical properties, doping with nitrogen has been performed on two series of bioactive glasses: series (I) was a "bioglass" composition (without P2O5) within the quaternary system SiO2-Na2O-CaO-Si3N4 and series (II) was a simple substitution of CaF2 for CaO in series (I) glasses keeping the Na:Ca ratio constant. The objective of this work was to evaluate the effect of the variation in nitrogen and fluorine content on the properties of these glasses. The density, glass transition temperature, hardness and elastic modulus all increased linearly with nitrogen content which indicates that the incorporation of nitrogen stiffens the glass network because N is mainly in 3-fold coordination with Si atoms. Fluorine addition significantly decreases the thermal property values but the mechanical properties of these glasses remain unchanged with fluorine. The combination of both nitrogen and fluorine in oxyfluoronitride glasses gives better mechanical properties at much lower melting temperatures since fluorine reduces the melting point, allows higher solubility of nitrogen and does not affect the higher mechanical properties arising from incorporation of nitrogen. The characterization of these N and F substituted bioactive glasses using (29)Si MAS NMR has shown that the increase in rigidity of the glass network can be explained by the formation of SiO3N, SiO2N2 tetrahedra and Q(4) units with extra bridging anions at the expense of Q(3) units. Bioactivity of the glasses was investigated in vitro by examining apatite formation on the surface of glasses treated in acellular simulated body fluid (SBF) with ion concentrations similar to those in human blood plasma. Formation of a bioactive apatite layer on the samples treated in SBF was confirmed by grazing incidence X-ray diffraction and scanning electron microscopy (SEM) combined with energy dispersive X-ray spectroscopy (EDS). The crystallinity of this layer decreases with increasing N content suggesting that N may decrease bioactivity slightly. PMID:23676624

Bachar, Ahmed; Mercier, Cyrille; Tricoteaux, Arnaud; Hampshire, Stuart; Leriche, Anne; Follet, Claudine

2013-07-01

184

The even-odd effect in the Kerr effect for nematic homologous series  

Microsoft Academic Search

The Kerr effect of 4-n-alkyl- and 4-n-alkoxy-4'-cyanobiphenyls in their isotropic phase has been studied. The variation in the Kerr constant with the carbon chain length is discussed in comparison with even-odd effect in the nematic-isotropic transition temperature.

R. Yamamoto; S. Ishihara; S. Hayakawa; K. Morimoto

1977-01-01

185

Estimating damping effectiveness of BPA`s thyristor controlled series capacitor by applying time and frequency domain methods to measured response  

SciTech Connect

Recently, a 500-kV thyristor controlled series capacitor (TCSC) was installed in the Bonneville Power Administration system in the northwestern United States. Extensive field testing has included modulation experiments to determine the effect of the TCSC on low- frequency procedures, analysis methods, and results for estimating the damping effectiveness of the TCSC. Modulation methods include driving the TCSC with step and random noise, and analysis techniques include time (Prony analysis) and frequency-domain identification. Results indicate that: (1) the TCSC can have significant impact on system dynamics; and (2) under a very small feedback gain, the TCSC provides measurable added damping.

Trudnowski, D.J.; Donnelly, M.K.; Hauer, J.F.

1995-07-01

186

Replacement of the drop test with the vibration test — The effect of test temperature on reliability  

Microsoft Academic Search

Due to the more extensive testing of new portable products the employment of efficient testing methods has become ever more important. The replacement of the commonly employed JESD22-B111 drop test with the vibration test has been investigated owing to the inconveniences related to the drop testing. The emphasis of the study has been placed on how the results of the

T. T. Mattila; L. Suotula; J. K. Kivilahti

2008-01-01

187

Identifying Autocorrelation Generated by Various Error Processes in Interrupted Time-Series Regression Designs: A Comparison of AR1 and Portmanteau Tests  

ERIC Educational Resources Information Center

Regression models used in the analysis of interrupted time-series designs assume statistically independent errors. Four methods of evaluating this assumption are the Durbin-Watson (D-W), Huitema-McKean (H-M), Box-Pierce (B-P), and Ljung-Box (L-B) tests. These tests were compared with respect to Type I error and power under a wide variety of error…

Huitema, Bradley E.; McKean, Joseph W.

2007-01-01

188

April 24, 2001 Radiation Tests for Single Event Effects  

E-print Network

April 24, 2001 Radiation Tests for Single Event Effects for the ATLAS Tile Calorimeter Front End-mail: Richard.Teuscher@cern.ch, spano@hep.uchicago.edu Proton irradiation tests for single event effects card, and the ADC integrator card. 1 Objective This note describes proton irradiation tests for single

189

Effects of Coaching on GRE Aptitude Test Scores.  

ERIC Educational Resources Information Center

After adjusting for different background characteristics of students, effects on test scores were related to the length and type of test coaching programs offered. The data suggest that the test item types in the Graduate Record Examination General Test appear to show little susceptibility to formal coaching experiences. (Author/DWH)

Powers, Donald E.

1985-01-01

190

Preliminary Results of the Third Test Series of Nonmetal Material Flammability Evaluation In SKOROST Apparatus on the Space Station Mir  

NASA Technical Reports Server (NTRS)

The work has been done according to the US/Russian Joint Project "Experimental Evaluation of the Material Flammability in Microgravity" a continued combustion study in the SKOROST test apparatus on the OS Mir. The objective of the project was to evaluate the flammability and flame-spread rate for the selected polymer materials in low velocity flow in microgravity. Lately, the issue of nonmetal material combustion in microgravity has become of great importance, based on the necessity to develop the fire safety system for the new International Space Station (ISS). Lack of buoyant flow in microgravity reduces oxygen transfer into the combustion zone, which leads to flame extinction when the flow velocity is less than the limiting flow velocity V(sub lim) for the material. The ISS FGB fire-safety system was developed based on this phenomenon. The existence of minimum flow velocity V(sub lim) to sustain fire for the selected materials was determined both theoretically and experimentally. In the latter, it is shown that, even for thermally thin nonmetal materials with a very low oxygen index C(sub lim) of 12.5% (paper sheets with the thickness of 0.1 mm), a limiting flow velocity V(sub lim) exists at oxygen concentration Co(sub OX) = 17-21%, and is about 1.0 - 0.1 cm/sec. This might be explained by the relative increase in thermal losses due to radiation from the surface and from the gaseous phase. In the second series of experiments in Skorost apparatus on Orbital Station Mir the existence of the limiting flow velocity V(sub lim) for combustion was confirmed for PMMA and glass-epoxy composite strip samples 2 mm thick at oxygen concentration C(sub OX) = 21.5%. It was concluded that V(sub lim) depends on C(sub OX) for the PMMA sample with a low oxygen index of 15.5%, the limiting flow velocity V(sub lim) was less than 0.5 cm/sec, and for the glass-epoxy composite sample with a high oxygen index of 19%, the limiting flow velocity V(sub lim) was higher than 15 cm/sec. As of now only those materials that maintain their integrity during combustion were investigated. The materials that disintegrate when burning present more danger for fire safety because the flame can spread farther with the parts of the structure, ejected melt drops, et cetera. Materials such as polyethylene are of great interest since they form a lengthy melt zone during the combustion in normal gravity. This melt zone generates drops of liquids that promote faster flame spread compared to usual combustion. The preliminary results of polyethylene insulation flammability evaluation in microgravity are shown in the NASA Wire Insulation Flammability (WIF) experiment during Space Shuttle flight STS-50. A lot of interesting data was collected during the WIF test program. However, one of the most important results was that, in microgravity, the extinction of the polyethylene occurred almost immediately when the flow of relatively low oxygen concentration (C(sub OX)=21%) was stopped. The purpose of the work reported here is to expand the existing data base on material flammability in microgravity and to conduct the third series of the space experiment using Skorost apparatus on Orbiatl Station Mir with melting polymers, which might increase the probability of fire and its propagation in ventilated microgravity environment of orbiting spacecraft.

Ivanov, A. V.; Alymov, V. F.; Smirnov, A. B.; Shalayev, S. P.; Ye.Belov, D.; Balashov, Ye.V.; Andreeva, T. V.; Semenov, A. V.; Melikhov, A. S.; Bolodyan, I. A.; Potyakin, V. I.

1999-01-01

191

Time-series Photometry of the Pre-Main Sequence Binary V4046 Sgr: Testing the Accretion Stream Theory  

NASA Astrophysics Data System (ADS)

Most stars are born in binaries, and the evolution of protostellar disks in pre-main sequence (PMS) binary stars is a current frontier of star formation research. PMS binary stars can have up to three accretion disks: two circumstellar disks and a circumbinary disk separated by a dynamically cleared gap. Theory suggests that mass may periodically flow in an accretion stream from a circumbinary disk across the gap onto circumstellar disks or stellar surfaces. Thus, accretion in PMS binaries is controlled by not only radiation, disk viscosity, and magnetic fields, but also by orbital dynamics.As part of a larger, ongoing effort to characterize mass accretion in young binary systems, we test the predictions of the binary accretion stream theory through continuous, multi-orbit, multi-color optical and near-infrared (NIR) time-series photometry. Observations such as these are capable of detecting and characterizing these modulated accretion streams, if they are generally present. Broad-band blue and ultraviolet photometry trace the accretion luminosity and photospheric temperature while NIR photometry provide a measurement of warm circumstellar material, all as a function of orbital phase. The predicted phase and magnitude of enhanced accretion are highly dependent on the binary orbital parameters and as such, our campaign focuses on 10 PMS binaries of varying periods and eccentricities. Here we present multi-color optical (U, B,V, R), narrowband (H?), and multi-color NIR (J, H) lightcurves of the PMS binary V4046 Sgr (P=2.42 days) obtained with the SMARTS 1.3m telescope and LCOGT 1m telescope network. These results act to showcase the quality and breadth of data we have, or are currently obtaining, for each of the PMS binaries in our sample. With the full characterization of our sample, these observations will guide an extension of the accretion paradigm from single young stars to multiple systems.

Tofflemire, Benjamin M.; Mathieu, Robert D.; Ardila, David R.; Ciardi, David R.

2015-01-01

192

Scaling Effects in Direct Shear Tests  

Microsoft Academic Search

Laboratory experiments of the direct shear test were performed on spherical particles of different materials and diameters. Results of the bulk friction vs. non-dimensional shear displacement are presented as a function of the non-dimensional particle diameter. Simulations of the direct shear test were performed using the Discrete Element Method (DEM). The simulation results show Considerable differences with the physical experiments.

Andrés D. Orlando; Daniel M. Hanes; Hayley H. Shen

2009-01-01

193

Effective Teaching Practices during Physical Fitness Testing  

ERIC Educational Resources Information Center

Participation in fitness tests is among the most common memories many adults hold of physical education class. If students have a negative attitude towards fitness testing, they may be less likely to assess their own progress once they graduate. These negative attitudes often promote lifestyle choices that support participation in at-risk…

Stewart, Amanda; Elliot, Steven; Boyce, B. Ann; Block, Martin E.

2005-01-01

194

Synthesis and anti-inflammatory effects of a series of novel 7-hydroxycoumarin derivatives.  

PubMed

A number of 7-hydroxycoumarins have been synthesised by Pechmann cyclisation using differently substituted resorcinols employing perchloric acid as the condensing agent. All the compounds have been characterised by analytical and spectroscopic methods. The anti-inflammatory properties were tested with LPS-induced inflammation in J774 macrophages. Expression of iNOS and COX-2 was determined by Western blot, NO by nitrite assay and IL-6 by ELISA analyses. Fifteen of the tested 7-hydroxycoumarins also inhibited IL-6 production but none of them had any major inhibitory effect on COX-2 expression. PMID:21680063

Timonen, Juri M; Nieminen, Riina M; Sareila, Outi; Goulas, Antonis; Moilanen, Lauri J; Haukka, Matti; Vainiotalo, Pirjo; Moilanen, Eeva; Aulaskari, Paula H

2011-09-01

195

Effective software testing with a string-constraint solver  

E-print Network

This dissertation presents techniques and tools for improving software reliability, by using an expressive string-constraint solver to make implementation-based testing more effective and more applicable. Concolic testing ...

Kie?un, Adam

2009-01-01

196

Effect of chiropractic intervention on small scoliotic curves in younger subjects: A time-series cohort design  

Microsoft Academic Search

Background: Chiropractors have long claimed to affect scoliotic curves, and case studies abound reporting on successful outcomes. No clinical trials exist, however, that evaluate chiropractic's effectiveness in the management of scoliotic curves. Objective: To assess the effectiveness of chiropractic intervention in the management of adolescent idiopathic scoliosis in curves less than 20°. Design: Cohort time-series trial with all subjects electing

Charles A. Lantz; Jasper Chen

2001-01-01

197

Data book for 12.5-inch diameter SRB thermal model water flotation test: 14.7 psia, series P020  

NASA Technical Reports Server (NTRS)

Data acquired from the initial series of tests conducted to determine how thermal conditions affect SRB (Space Shuttle Solid Rocket Booster) flotation are presented. Acceleration, pressure, and temperature data recorded from initial water impact to final flotation position using a 12.5-inch diameter thermal model of the SRB at ambient pressure are included. The model was 136.9 inches long and weighed 117.3 lbm. The tests indicated the following differences from ambient temperature tests: (1) significant negative static pressures can occur during penetration; (2) maximum penetration is increased; and (3) final flotation is in the spar buoy mode.

Allums, S. L.

1974-01-01

198

Cost effective dynamic design and test requirements for Shuttle payloads  

NASA Technical Reports Server (NTRS)

The results of a study examining current spacecraft dynamic design and test requirements for the cost effective design and development of Shuttle payloads are presented. Dynamic environments, payload configurations, design/test requirements, test levels, assembly level of testing, simulation methods, prototype role, load limiting, test facilities, and flight measurements are discussed as they relate to the development of a cost effective design and test philosophy for Shuttle Spacelab payloads. It is concluded that changes to current design/test practices will minimize long range payload costs. However, changes to current practices need be quantitatively evaluated before an orderly progression to more cost effective methods can be achieved without undue risk of mission failures. Of major importance is optimization of test levels and plans for payloads and payload subsystems which will result in minimum project costs.

Stahle, C. V.; Gongloff, H. R.; Bangs, W. F.

1975-01-01

199

Effect-based interpretation of toxicity test data using probability and comparison with alternative methods of analysis  

SciTech Connect

A methodology is described that incorporates the intra- and intertest variability and the biological effect of bioassay data in evaluating the toxicity of single and multiple tests for regulatory decision-making purposes. The single- and multiple-test regulatory decision probabilities were determined from t values (n {minus} 1, one-tailed) derived from the estimated biological effect and the associated standard error at the critical sample concentration. Single-test regulatory decision probabilities below the selected minimum regulatory decision probability identify individual tests as noncompliant. A multiple-test regulatory decision probability is determined by combining the regulatory decision probability of a series of single tests. A multiple-test regulatory decision probability is determined by combining the regulatory decision probability of a series of single tests. A multiple-test regulatory decision probability below the multiple-test regulatory decision minimum identifies groups of tests in which the magnitude and persistence of the toxicity is sufficient to be considered noncompliant or to require enforcement action. Regulatory decision probabilities derived from the t distribution were compared with results based on standard and bioequivalence hypothesis tests using single- and multiple-concentration toxicity test data from an actual national pollutant discharge incorporated the precision of the effect estimate into regulatory decisions at a fixed level of effect. Also, probability-based interpretation of toxicity tests provides incentive to laboratories to produce, and permit holders to use, high-quality, precise data, particularly when multiple tests are used in regulatory decisions. These results are contrasted with standard and bioequivalence hypothesis tests in which the intratest precision is a determining factor in setting the biological effect used for regulatory decisions.

Gully, J.R.; Baird, R.B.; Markle, P.J.; Bottomley, J.P.

2000-01-01

200

Test effectiveness study report: An analytical study of system test effectiveness and reliability growth of three commercial spacecraft programs  

NASA Technical Reports Server (NTRS)

Failure data from 16 commercial spacecraft were analyzed to evaluate failure trends, reliability growth, and effectiveness of tests. It was shown that the test programs were highly effective in ensuring a high level of in-orbit reliability. There was only a single catastrophic problem in 44 years of in-orbit operation on 12 spacecraft. The results also indicate that in-orbit failure rates are highly correlated with unit and systems test failure rates. The data suggest that test effectiveness estimates can be used to guide the content of a test program to ensure that in-orbit reliability goals are achieved.

Feldstein, J. F.

1977-01-01

201

Effective random testing of concurrent programs  

Microsoft Academic Search

Multithreaded concurrent programs often exhibit wrong be- haviors due to unintended interferences among the concur- rent threads. Such errors are often hard to find because they typically manifest under very specific thread schedules. Tra- ditional testing, which pays no attention to thread schedules and non-deterministically exercises a few arbitrary sched- ules, often misses such bugs. Traditional model checking techniques, which

Koushik Sen

2007-01-01

202

Effects of Incorporating Humor in Test Items.  

ERIC Educational Resources Information Center

Two matched forms of a 50 item grammar test were developed. Twenty items designed to be humorous were included in one form. Inclusion of humorous items did not affect grammar scores on matched humorous/nonhumorous items, nor on commmon post-treatment items. Inclusion did not affect results of anxiety measures. (Author/DWH)

McMorris, Robert F.; And Others

1985-01-01

203

Time-Series Analysis: Assessing the Effects of Multiple Educational Interventions in a Small-Enrollment Course  

NSDL National Science Digital Library

Time-series designs are an alternative to pretest-posttest methods that are able to identify and measure the impacts of multiple educational interventions, even for small student populations. Here, we use an instrument employing standard multiple-choice conceptual questions to collect data from students at regular intervals. The questions are modified by asking students to distribute 100 Confidence Points among the options in order to indicate the perceived likelihood of each answer option being the correct one. Tracking the class-averaged ratings for each option produces a set of time-series. ARIMA (autoregressive integrated moving average) analysis is then used to test for, and measure, changes in each series. In particular, it is possible to discern which educational interventions produce significant changes in class performance. Cluster analysis can also identify groups of students whose ratings evolve in similar ways. A brief overview of our methods and an example are presented.

Warren, Aaron R.

2010-01-18

204

Effect of Aminophenyl and Aminothiahexyl ?-d-Glycosides of the Manno-, Gluco-, and Galacto-Series on Type 1 Fimbriae-Mediated Adhesion of Escherichia coli  

PubMed Central

Adhesion of bacteria to the glycosylated surface of their target cells is typically mediated by fimbrial lectins, exposed on the bacterial surface. Among the best-investigated and most important fimbriae are type 1 fimbriae, for which ?-d-mannopyranoside-specificity has been described. This carbohydrate specificity is mediated by the type 1 fimbrial lectin FimH. In this account, we have employed four different set-ups to assay type 1 fimbriae-mediated bacterial adhesion, including tailor-made glycoarrays. The focus of our study was on testing FimH specificity with regard to the glycone part of a glycosidic ligand by testing a series of synthetic ?-mannosides, as well as ?-glucosides and ?-galactosides. Unexpectedly, it was found that in solution all tested aminothiahexyl glycosides inhibit bacterial adhesion but that this effect is unspecific. Instead it is due to cytotoxicity of the respective glycosides at high mm concentrations. PMID:24833058

Fessele, Claudia; Lindhorst, Thisbe K.

2013-01-01

205

Irradiation effects on Charpy impact and tensile properties of low upper-shelf welds, HSSI series 2 and 3  

SciTech Connect

When reactor pressure vessel steels exhibit Charpy V-notch impact upper-shelf energy levels of less than 68 J (50 ft-lb), the requirements of Title 10, Code of Federal Regulations, Part 50, Appendix G, are not met. The regulations require, as an option, that a fracture mechanics analysis be performed that conservatively demonstrates adequate safety margins for continued operation. Under conditions where large prefracture crack-tip plastic zones are present, linear-elastic fracture mechanics concepts are not applicable, and the use of elastic-plastic fracture mechanics concepts has been recommended by the US Nuclear Regulatory Commission. A number of Babcock and Wilcox Company-fabricated reactor vessels in commercial pressurized water reactor plants include welds with both relatively low initial Charpy upper-shelf energies and high copper concentrations, which make them highly sensitive to neutron irradiation. As a result, the Charpy upper-shelf energies of many welds are expected to fall below 68 J (50 ft-lb) prior to reaching design life. The Heavy-Section Steel Irradiation Program conducted the Second and Third Irradiation Series to investigate the effects of irradiation on the ductile fracture toughness of seven commercially fabricated, low upper-shelf welds. This report represents analyses of the Charpy impact and tensile test data, including adjustments for irradiation temperature and fluence normalization, which make possible comparison of the irradiation sensitivity the different welds.

Nanstad, R.K.; Berggren, R.G. (Oak Ridge National Lab., TN (United States))

1991-08-01

206

Including the Effects of Future Tests in Aircraft Structural Design  

Microsoft Academic Search

1. Abstract In this paper, we investigate the effects of future tests on aircraft structural safety, focusing on the numbers of coupon tests and structural element tests. The mean failure stress is assumed to be predicted by a failure criterion (e.g. Tsai-Wu), and the initial distribution of this mean failure stress reflects the uncertainty in the analysis procedure that uses

Erdem Acar; Raphael T. Haftka; Nam-Ho Kim; Deepti Buchi

207

The Testing Effect on Skills Learning Might Last 6 Months  

ERIC Educational Resources Information Center

In a recent study we found that testing as a final activity in a skills course increases the learning outcome compared to spending an equal amount of time practicing. Whether this testing effect measured as skills performance can be demonstrated on long-term basis is not known. The research question was: does testing as a final activity in a…

Kromann, C. B.; Bohnstedt, C.; Jensen, M. L.; Ringsted, C.

2010-01-01

208

EVALUATION OF THREE OIL SPILL LABORATORY DISPERSANT EFFECTIVENESS TESTS  

EPA Science Inventory

EPA evaluated three laboratory Methods: the Revised Standard Dispersant Effectiveness Test currently used (and currently required by regulation) in the United States, the Swirling Flask Test (developed by Environment Canada), and the IFP-Dilution Test (used in France and other Eu...

209

Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes  

E-print Network

Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes Computer Science Department This paper presents an approach for generating test data for unit-level, and possibly integration-level, testing based on sampling over intervals of the input probability distribution, i.e., one that has been

Hayes, Jane E.

210

Scaling Effects in Direct Shear Tests  

NASA Astrophysics Data System (ADS)

Laboratory experiments of the direct shear test were performed on spherical particles of different materials and diameters. Results of the bulk friction vs. non-dimensional shear displacement are presented as a function of the non-dimensional particle diameter. Simulations of the direct shear test were performed using the Discrete Element Method (DEM). The simulation results show Considerable differences with the physical experiments. Particle level material properties, such as the coefficients of static friction, restitution and rolling friction need to be known a priori in order to guarantee that the simulation results are an accurate representation of the physical phenomenon. Furthermore, laboratory results show a clear size dependency on the results, with smaller particles having a higher bulk friction than larger ones.

Orlando, Andrés D.; Hanes, Daniel M.; Shen, Hayley H.

2009-06-01

211

Test Anxiety and Depression in Sentence Memory: Parallel Effects?  

ERIC Educational Resources Information Center

Level of state test anxiety and depression were related to encoding strategy (imagery versus sematic instructions) in a study of sentence memory. Subjects were 80 female undergraduate students. Negative effects for test anxiety were found in both strategy conditions. Negative effects were found for depression when the semantic encoding strategy…

Hedl, John J., Jr.

212

The LM-230A - A cost effective test system  

NASA Astrophysics Data System (ADS)

The development of an automatic testing system, which has a high confidence level, reduced maintainance, and reduced human error and judgement is examined. The size, complexity and cost of test stations, which perform the required evaluation of components, limit their usefulness. The design of a cost-effective system which meets specific criteria is discussed. The requirements for a test system include: (1) performance, (2) generic content, (3) expandability, (4) utility, (5) modifiability, (6) troubleshooting, (7) maintainability, (8) training, (9) portability and (10) design friendliness. The components of the portable test system LM-230A, which include a basic test set, the assembly test module and cable, a power cable, an extender card, and a self-diagnostic tool, are described. A comparison of the LM-230A with test system requirements reveals that the system adheres to most of the criteria and is an effective, versatile testing system.

Allen, P. G.

1984-01-01

213

Characterisation of a novel series of aprotinin-derived anticoagulants. II. Comparative antithrombotic effects on primary thrombus formation in vivo.  

PubMed

Upon vascular damage platelet activation and blood coagulation are initiated. Interference at the initial level of the activation of the coagulation cascade can result in effective inhibition of thrombus formation. The in vivo antithrombotic properties of a series of bovine pancreatic trypsin inhibitor mutants (BPTI, aprotinin) 4C2, 7L22, 5L15, 5L15-PEG, 6L15 and 5L84, as described in the accompanying paper, with a combined inhibitory activity on factor Xa, factor VIIa-tissue factor complex, factor XIa and plasma kallikrein were compared to rTAP, r-hirudin, heparin and enoxaparin in a platelet rich thrombosis model in hamsters. Platelet dependent thrombus deposition was quantified by dedicated image analysis after transillumination of the femoral vein to which a standardised vascular trauma was applied. After increasing intravenous bolus injections all tested agents, except for aprotinin, induced a dose dependent decrease of thrombus formation and a concomitant prolongation of the aPTT. From the linear correlation between these two parameters it was found that 5 out of the 6 tested aprotinin analogues, rTAP and r-hirudin completely inhibited thrombus formation at a therapeutical (2- to 3-fold) aPTT prolongation while 4C2, heparin and enoxaparin only inhibited thrombus formation for 40 to 50 percent at a 2-fold aPTT prolongation. Based on the calculated IC50 values for thrombus formation rTAP was found to be the most active compound in this model. It is concluded that acceptable interference at the initial level of the blood coagulation, e.g. within a therapeutical aPTT prolongation, can significantly inhibit platelet deposition at a site of vascular injury. PMID:8585002

Stassen, J M; Lambeir, A M; Vreys, I; Deckmyn, H; Matthyssens, G; Nyström, A; Vermylen, J

1995-08-01

214

Effect of self-assessment on test scores: student perceptions  

NSDL National Science Digital Library

After a sudden increase in most of the individual grades in a multiple-choice test, students were asked to rank the three most relevant factors responsible for this outcome. Among eight others, the availability of a test for self-assessment before the final test was by far the most frequently mentioned (82.4% of the students). Questions applied during different course activities did not have the same effect on student scores as the "online" self-assessment test.

Beatriz U Ramirez (Universidad de Santiago de Chile)

2010-09-01

215

The Effectiveness of Special Education: A Time Series Analysis of Reading Performance in Regular and Special Education Settings.  

ERIC Educational Resources Information Center

The impact of regular and special education on 11 learning-disabled children in fourth through sixth grade was studied by analyzing their slope of improvement on curriculum-based measures of reading scores. A time series analysis indicated that daily reading instruction in a resource room was a more effective intervention than regular education.…

Marston, Douglas

1988-01-01

216

A Bayesian model of time activity data to investigate health effect of air pollution in time series studies  

Microsoft Academic Search

Air pollution studies such as time series use measures of ambient concentration to approximate aggregate personal exposures. The resulting difference in health effects can be evaluated using survey data on the time people spend in different environments, with differing concentrations of pollutants. We present a Bayesian hierarchical model that incorporates time activity data to obtain an adjusted distribution of air

Marta Blangiardo; Anna Hansell; Sylvia Richardson

2011-01-01

217

Short term effects of air pollution on health: a European approach using epidemiologic time series data: the APHEA protocol  

Microsoft Academic Search

BACKGROUND AND OBJECTIVES: Results from several studies over the past five years have shown that the current levels of pollutants in Europe and North America have adverse short term effects on health. The APHEA project aims to quantifying these in Europe, using standardised methodology. The project protocol and analytical methodology are presented here. DESIGN: Daily time series data were gathered

K Katsouyanni; J Schwartz; C Spix; G Touloumi; D Zmirou; A Zanobetti; B Wojtyniak; J M Vonk; A Tobias; A Pönkä; S Medina; L Bachárová; H R Anderson

1996-01-01

218

Estimation of effect size in a meta-analysis of series of validity studies on matriculation examinations in Nigeria  

Microsoft Academic Search

The study formulated an algebraic path from the series of studies meta-analyzed on the validity of the University Matriculation Examination (UME) in Nigeria; in order to obtain a unique and common metrics with a view of making the results to convey the same interpretation. The study determined both the individual and overall effect sizes of 30 empirical studies. It also

E. O. Adeyemo; E. R. I. Afolabi

2009-01-01

219

A Test of the Abstinence Violation Effect.  

ERIC Educational Resources Information Center

According to the abstinence violation effect, highly controlled drinkers tend to overindulge following an initial slip. To investigate this relapse model, 47 male college students, ranging in age from 21 to 46, were assigned either to an unrestrained or a restrained drinker group according to their scores on the Restrained Drinking Scale. Subjects…

Ruderman, Audrey J.

220

Investigation on Loading Effect of a Series Resonance Circuit on Asynchronous Generator with AC-DC-AC Converter as a Load Balancer  

Microsoft Academic Search

This paper deals with the evaluation on loading effect of series resonance circuit at the point of common coupling (PCC) of an asynchronous generator. Effect of frequency variations on series resonance circuit and its effect on input side of the uncontrolled rectifier have been investigated experimentally. The result shows power factor has been improved even though load current is lagging

K. Subramanian; K. K. Ray

2009-01-01

221

Zeeman Effect of J=2 States of Sr: g-Factor Variation for Interacting Rydberg Series  

Microsoft Academic Search

Measurements of the g factor for a series of bound, 5snd J=2 states in Sr, in the region of an avoided crossing between 1D2 and 3D2 Rydberg series, show a variation which is in agreement with the prediction of multichannel quantum-defect theory. The g factor was measured by multiphonon ionization spectroscopy. The dependence of ionization signal on laser polarization was

J. J. Wynne; J. A. Armstrong; P. Esherick

1977-01-01

222

Experimental tests of the endowment effect  

Microsoft Academic Search

The endowment effect, which predicts undertrading and a willingness-to-accept greater than willingness-to-pay, is studied using responses that remove all reference to buying or selling and focuses only on choice tasks. The results significantly lower the willingness-to-pay\\/willingness-to accept discrepancy, but the latter is still significant. A high efficiency open display uniform price auction is used to exchange mugs for money. Since

Robert Franciosi; Praveen Kujal; Roland Michelitsch; Vernon Smith; Gang Deng

1996-01-01

223

Trend Change Detection in NDVI Time Series: Effects of Inter-Annual Variability and Methodology  

NASA Technical Reports Server (NTRS)

Changing trends in ecosystem productivity can be quantified using satellite observations of Normalized Difference Vegetation Index (NDVI). However, the estimation of trends from NDVI time series differs substantially depending on analyzed satellite dataset, the corresponding spatiotemporal resolution, and the applied statistical method. Here we compare the performance of a wide range of trend estimation methods and demonstrate that performance decreases with increasing inter-annual variability in the NDVI time series. Trend slope estimates based on annual aggregated time series or based on a seasonal-trend model show better performances than methods that remove the seasonal cycle of the time series. A breakpoint detection analysis reveals that an overestimation of breakpoints in NDVI trends can result in wrong or even opposite trend estimates. Based on our results, we give practical recommendations for the application of trend methods on long-term NDVI time series. Particularly, we apply and compare different methods on NDVI time series in Alaska, where both greening and browning trends have been previously observed. Here, the multi-method uncertainty of NDVI trends is quantified through the application of the different trend estimation methods. Our results indicate that greening NDVI trends in Alaska are more spatially and temporally prevalent than browning trends. We also show that detected breakpoints in NDVI trends tend to coincide with large fires. Overall, our analyses demonstrate that seasonal trend methods need to be improved against inter-annual variability to quantify changing trends in ecosystem productivity with higher accuracy.

Forkel, Matthias; Carvalhais, Nuno; Verbesselt, Jan; Mahecha, Miguel D.; Neigh, Christopher S.R.; Reichstein, Markus

2013-01-01

224

Evaluation of Changes in Correlation Dimension of a Time Series of RR Intervals during a Functional Exercise Test  

Microsoft Academic Search

Changes in the cardiac rhythm (CR) structure were analyzed from the viewpoint of nonlinear dynamics. The purpose was to evaluate the changes in the chaotic element (the correlation dimension D) of CR during a functional exercise test (the Harvard step test) in ten healthy males aged 17–18. Distinct changes in D of CR were observed during the test. Some general

A. S. Eidukaitis

2004-01-01

225

Volume 6 Issue 1 www.nasa.gov/centers/stennis January 2011 Stennis completes initial AJ26 test series  

E-print Network

by Aerojet to pro- vide first stage propulsion. The Dec. 17 test on Stennis' E-1 Test Stand involved a team of Orbital, Aerojet, and Stennis engineers, with Stennis employees serving as test conductors. The 55-second partners Pratt & Whit- ney Rocketdyne on the RS-68 engine and with Orbital Sciences/Aerojet on the AJ26

226

SERI Desiccant Cooling Test Facility. Status report. Preliminary data on the performance of a rotary parallel-passage silica-gel dehumidifier  

SciTech Connect

This report describes the SERI Desiccant Cooling Test Facility. The facility can test bench-scale rotary dehumidifiers over a wide range of controlled conditions. We constructed and installed in the test loop a prototype parallel-passage rotary dehumidifier that has spirally wound polyester tape coated with silica gel. The initial tests gave satisfactory results indicating that approximately 90% of the silica gel was active and the overall Lewis number of the wheel was near unity. The facility has several minor difficulties including an inability to control humidity satisfactorily and nonuniform and highly turbulent inlet velocities. To completely validate the facility requires a range of dehumidifier designs. Several choices are available including constructing a second parallel-passage dehumidifier with the passage spacing more uniform.

Schultz, K.J.

1986-04-01

227

Evaluation of process control effectiveness and diagnosis of variation in paper basis weight via multivariate time-series analysis  

Microsoft Academic Search

Multivariate time-series techniques are used to analyze the effectiveness of basis-weight control on a paper machine. Basis weight and four other process variables were collected from a production paper machine under three control conditions, ranging from no computer control to the normal operating basis-weight control strategy. Process control effectiveness is measured by comparing the observed output variation with an estimate

W. R. DEVRIES; S. M. WU

1978-01-01

228

Effects of testing conditions on conceptual survey results  

NSDL National Science Digital Library

Pre-testing and post-testing is a commonly used method in Physics Education Research to assess student learning gains. It is well recognized in the community that timings and incentives in delivering conceptual tests can impact test results. However, it is difficult to control these variables across different studies. As a common practice, a pre-test is often administered either at or near the beginning of a course, while a post-test can be given either at or near the end of a course. Also, in conducting such tests there often is no norm as to whether incentives should be offered to students. Because these variations can significantly affect test results, it is important to study and document their impact. We analyzed five years of data that were collected at The Ohio State University from over 2100 students, who took both the pre-test and post-test of the Conceptual Survey of Electricity and Magnetism under various timings and incentives. We observed that the actual time frame for giving a test has a marked effect on the test results and that incentive granting also has a significant influence on test outcomes. These results suggest that one should carefully monitor and document the conditions under which tests are administered.

Ding, Lin; Reay, Neville W.; Lee, Albert; Bao, Lei

2008-09-22

229

Effect of Treadmill Training on Specific Gait Parameters in Older Adults with Frailty: Case Series  

PubMed Central

Background and Purpose Treadmill walking training (TWT) as an intervention to improve the gait of frail older adults has not been well studied. In this pilot study, we describe the feasibility, tolerance, and effect of TWT on specific gait parameters during overground walking in four frail older adults as a prelude to developing larger scale exercise intervention trials in this high-risk population. Case Description Four community-residing frail older individuals (age>70) with Mini-Mental Status Examination score of 26 or higher and no activity limitations. Frailty was defined as presence of at least three out of the following five attributes: slow gait (<1 m/sec), unintentional weight loss (>10 lbs in prior year), self-report of poor grip strength, exhaustion, and low level of physical activity. Intervention TWT consisted of 24 sessions (3 times/week for 8 weeks). Five quantitative gait parameters [velocity, stride length, swing time, percentage of double support phase, coefficient of variation (COV) of stride length] during overground walking were measured at baseline, weekly during training, and immediately post-TWT. Outcome All participants tolerated TWT without significant complications. Following TWT, gait velocity increased in all participants by 6.4 to 26.8 cm/sec, which was larger than the reported value for meaningful change in gait velocity (4 cm/sec). Stride length and double support phase also showed improvement in all participants (mean percentage increase of 10.8 % for stride length, and 17.1% reduction for double support phase post training compared to baseline). Swing time improved in three participants (mean reduction of 4.5 %). The COV of stride length did not show consistent improvement. Discussion This case series shows that TWT is feasible and well tolerated by frail older adults, and may improve most gait parameters in this high-risk population. PMID:22124418

Holtzer, Roee; Mahoney, Jeannette; Wang, Cuiling; Verghese, Joe

2011-01-01

230

Separate effects test stand for obtaining hydrotransport data  

SciTech Connect

Based on earlier hydrotransport research by English and Russian researchers, a special test stand has been designed and constructed to obtain data to determine hydraulic drag, pipe wear, and comminution of particles. These data are intended for design and separate-effects operating information. This information will be used to supplement data developed by the Hydrotransport Research Facility located at the Pittsburgh Mining Operations, Pittsburgh, Pennsylvania. This report describes the equipment as designed, explains how the hydraulic drag is calculated using test-stand data, and presents some preliminary tests results using water. Tests using water are continuing to further substantiate the system and later, tests will be started using slurries.

Allen, C.H.

1980-08-01

231

Modelling and suicide: a test of the Werther effect.  

PubMed

The present study investigates whether news about suicides of prominent persons evokes an imitative effect. To this end, daily overall suicide frequencies of a German federal state, Baden-Württemberg, were examined for the years 1968 to 1980 and were related to prominent suicides that were publicized in major newspapers. Data were analysed quasi-experimentally and by means of a time series regression analysis. These methods yielded significant or marginally significant increases, respectively, for the week following the news. Alternative social psychological explanations were examined, and possible statistical artifacts were taken into account. The results are on the whole consistent with the assumption of an imitative effect. PMID:1472984

Jonas, K

1992-12-01

232

Evaluation of three oil spill laboratory dispersant effectiveness tests  

SciTech Connect

EPA evaluated three laboratory methods: the Revised Standard Dispersant Effectiveness Test currently used (and currently required by regulation) in the United States, the Swirling Flask Test (developed by Environment Canada), and the IFP-Dilution Test (used in France and other European countries). Six test oils and three dispersants were evaluated; dispersants were applied to the oil at an average 1:10 ratio (dispersant to oil) for each of the three laboratory methods. A screening criterion was established that required a combination that gave at least 20 percent effectiveness results. The selected combination turned out to be Prudhoe Bay crude oil (an EPA-American Petroleum Institute Standard Reference Oil) and the dispersant Corexit 9527. EPA's evaluation concluded that the three tests give similar precision results, but that the Swirling Flask Test was fastest, cheapest, simplest, and required least operator skill.

Sullivan, D.; Farlow, J.; Sahatjian, K.A.

1993-01-01

233

Effect of Long-Term Climbing Training on Cerebellar Ataxia: A Case Series  

PubMed Central

Background. Efficient therapy for both limb and gait ataxia is required. Climbing, a complex task for the whole motor system involving balance, body stabilization, and the simultaneous coordination of all 4 limbs, may have therapeutic potential. Objective. To investigate whether long-term climbing training improves motor function in patients with cerebellar ataxia. Methods. Four patients suffering from limb and gait ataxia underwent a 6-week climbing training. Its effect on ataxia was evaluated with validated clinical balance and manual dexterity tests and with a kinematic analysis of multijoint arm and leg pointing movements. Results. The patients increased their movement velocity and achieved a more symmetric movement speed profile in both arm and leg pointing movements. Furthermore, the 2 patients who suffered the most from gait ataxia improved their balance and 2 of the 4 patients improved manual dexterity. Conclusion. Climbing training has the potential to serve as a new rehabilitation method for patients with upper and lower limb ataxia. PMID:22191034

Marianne Anke, Stephan; Sylvie, Krattinger; Jérôme, Pasquier; Shahid, Bashir; Thomas, Fournier; Dieter Georg, Ruegg; Karin, Diserens

2011-01-01

234

The effects of nonlinear series resonance on Ohmic and stochastic heating in capacitive discharges  

SciTech Connect

The flow of electron and ion conduction currents across a nonlinear capacitive sheath to the electrode surface self-consistently sets the dc bias voltage across the sheath. We incorporate these currents into a model of a homogeneous capacitive sheath in order to determine the enhancement of the Ohmic and stochastic heating due to self-excitation of the nonlinear series resonance in an asymmetric capacitive discharge. At lower pressures, the series resonance can enhance both the Ohmic and stochastic heating by factors of 2-4, with the Ohmic heating tending to zero as the pressure decreases. The model was checked, for a particular set of parameters, by a particle-in-cell (PIC) simulation using the homogeneous sheath approximation, giving good agreement. With a self-consistent Child-law sheath, the PIC simulation showed increased heating, as expected, whether the series resonance is important or not.

Lieberman, M. A.; Lichtenberg, A. J.; Kawamura, E. [Department of Electrical Engineering and Computer Science-1770, University of California, Berkeley, California 94720 (United States); Mussenbrock, Thomas; Brinkmann, Ralf Peter [Lehrstuhl fuer Theoretische Elektrotechnik, Ruhr-Universitaet Bochum, D44801 Bochum (Germany)

2008-06-15

235

EFFECTS OF ENVIRONMENTAL CHEMICALS ON FETAL TESTES TESTOSTERONE PRODUCTION  

EPA Science Inventory

Effects of Environmental Chemicals on Fetal Testes Testosterone Production Lambright, CS , Wilson, VS , Furr, J, Wolf, CJ, Noriega, N, Gray, LE, Jr. US EPA, ORD/NHEERL/RTD, RTP, NC Exposure of pregnant rodents to certain environmental chemicals during criti...

236

Testing a Sociological Theory of Recreational Drug Effects  

ERIC Educational Resources Information Center

The hypothesis that the normal effects of recreationally used drugs vary across substances, users, and situations as a function of normative content, normative clarity, and situational context was tested. (Author/JC)

Orcutt, James D.; Briggs, Donald A.

1975-01-01

237

Effects of First Occasion Test Experience on Longitudinal Cognitive Change  

ERIC Educational Resources Information Center

Effects of additional test experience on longitudinal change in 5 cognitive abilities was examined in a sample of healthy adults ranging from 18 to 80 years of age. Participants receiving experience with parallel versions of the cognitive tests on the first occasion had more positive cognitive change an average of 2.5 years later than participants…

Salthouse, Timothy A.

2013-01-01

238

Effects of Prose Complexity on Achievement Test Item Difficulty.  

ERIC Educational Resources Information Center

To help increase the understanding of sources of difficulty in test items, a study was undertaken to evaluate the effects of various aspects of prose complexity on the difficulty of achievement test items. The items of interest were those that presented a verbal stimulus followed by a question about the stimulus and a standard set of…

Scheuneman, Janice; And Others

239

Effectiveness of Dance\\/Movement Therapy on Reducing Test Anxiety  

Microsoft Academic Search

Test anxiety is a multidimensional problem which can lead to undue distress for the individual. The objective of this pilot study was to investigate if dance\\/movement therapy (DMT) might be an effective intervention for reducing symptoms of test anxiety. Twenty-one participants, all of whom were students at an urban university, voluntarily participated in this study. Participants were both graduate and

Tracy Erwin-Grabner; Sherry W. Goodill; Ellen Schelly Hill; Kristen Von Neida

1999-01-01

240

Effects of Anxiety and Sex on Neuropsychological Tests.  

ERIC Educational Resources Information Center

Studied effects of anxiety and sex on neuropsychological test performance. Right-handed subjects responded to the Finger Tapping (FT), Form Board (FB), and State-Trait Anxiety tests. Females performed significantly slower on the FT than males, and for females, trait anxiety was negatively correlated with FT performance and positively correlated…

King, Glen D.; And Others

1978-01-01

241

Effect of Insulating Barriers in Arc Flash Testing  

Microsoft Academic Search

Low voltage arc flash testing has been conducted using the standard IEEE 1584 test procedure, but modified so that the electrode tips terminated in an insulating barrier instead of in the open air. The barrier prevents downwards arc motion, has a stabilizing effect on the arcs, and produces a strong horizontal plasma cloud flow. It also produces shorter arc lengths,

R. Wilkins; M. Lang; Malcolm Allison

2006-01-01

242

Effects of Anticipated Form of Testing on Learning. Final Report.  

ERIC Educational Resources Information Center

This report deals with the effects of an individual's expectations regarding how he will be tested on what he does during learning and what gets stored in memory. It is maintained that essay exams requiring recall are preferable to objective (recognition) tests. There are some bits of empirical evidence as well as some theoretical reasons to…

Lovelace, Eugene A.

243

The Effects of the Reverse Current Caused by the Series Compensation on the Current Differential Protection  

PubMed Central

The series capacitor compensation is one of the key technologies in the EHV and UHV long distance power transmission lines. This paper analyzes the operation characteristics of the main protection combined with the engineering practice when the transmission line overcompensation due to the series compensation system is modified and analyzes the influence of the transition resistance and the system operation mode on the current differential protection. According to the simulation results, it presents countermeasure on improving the sensitivity of differential current protection. PMID:25247206

Tang, Cui; Yin, Xianggen; Qi, Xuanwei; Zhang, Zhe

2014-01-01

244

The effects of the reverse current caused by the series compensation on the current differential protection.  

PubMed

The series capacitor compensation is one of the key technologies in the EHV and UHV long distance power transmission lines. This paper analyzes the operation characteristics of the main protection combined with the engineering practice when the transmission line overcompensation due to the series compensation system is modified and analyzes the influence of the transition resistance and the system operation mode on the current differential protection. According to the simulation results, it presents countermeasure on improving the sensitivity of differential current protection. PMID:25247206

Tang, Cui; Yin, Xianggen; Qi, Xuanwei; Zhang, Zhe; Wen, Minghao

2014-01-01

245

Baccalaureate and Beyond Longitudinal Study: 2000/01 Follow-Up Field Test Methodology Report. Working Paper Series.  

ERIC Educational Resources Information Center

This report describes and evaluates the methods and procedures used for the field test of the Baccalaureate and Beyond Longitudinal Study (B&B:2000/01). The B&B:2000/01 field test included important changes from previous B&B surveys (conducted in 1994 and 1997) in its sample design and collection of data. The introductory chapter describes the…

Biber, Melissa R.; Link, Michael W.; Riccobono, John A.; Siegel, Peter H.

246

Abstract--This paper describes the application of fuzzy logic to the Short Physical Performance Battery (SPPB) test, a series  

E-print Network

approaches in caring for the elderly. One recent example of this research focus has resulted in Tiger in elders. So, we centered on the Short Physical Performance Battery (SPPB) test [3]. This exam was created balance, gait, strength, and endurance. Although it is a timed performance test, each subtask score

He, Zhihai "Henry"

247

Representing Response-Time Information in Item Banks. Law School Admission Council Computerized Testing Report. LSAC Research Report Series.  

ERIC Educational Resources Information Center

The availability of item response times made possible by computerized testing represents an entirely new type of information about test items. This study explores the issue of how to represent response-time information in item banks. Empirical response-time distribution functions can be fit with statistical distribution functions with known…

Schnipke, Deborah L.; Scrams, David J.

248

Effectiveness of Group Interaction on Conceptual Standardized Test Performance  

NSDL National Science Digital Library

In this article, the author analyzes the effectiveness of working in pairs on the Conceptual Survey of Electricity and Magnetism test in a calculus-based introductory physics course. Students who collaborated with a peer showed significantly larger normalized gain on individual testing after the group work than those who did not collaborate. Peer collaboration also shows evidence for co-construction. We discuss the effect of pairing students with different individual achievements.

Singh, Chandralekha

2006-12-06

249

Neural correlates of testing effects in vocabulary learning.  

PubMed

Tests that require memory retrieval strongly improve long-term retention in comparison to continued studying. For example, once learners know the translation of a word, restudy practice, during which they see the word and its translation again, is less effective than testing practice, during which they see only the word and retrieve the translation from memory. In the present functional magnetic resonance imaging (fMRI) study, we investigated the neuro-cognitive mechanisms underlying this striking testing effect. Twenty-six young adults without prior knowledge of Swahili learned the translation of 100 Swahili words and then further practiced the words in an fMRI scanner by restudying or by testing. Recall of the translations on a final memory test after one week was significantly better and faster for tested words than for restudied words. Brain regions that were more active during testing than during restudying included the left inferior frontal gyrus, ventral striatum, and midbrain areas. Increased activity in the left inferior parietal and left middle temporal areas during testing but not during restudying predicted better recall on the final memory test. Together, results suggest that testing may be more beneficial than restudying due to processes related to targeted semantic elaboration and selective strengthening of associations between retrieval cues and relevant responses, and may involve increased effortful cognitive control and modulations of memory through striatal motivation and reward circuits. PMID:23578576

van den Broek, Gesa S E; Takashima, Atsuko; Segers, Eliane; Fernández, Guillén; Verhoeven, Ludo

2013-09-01

250

Single-event Effect Report for EPC Series eGaN FETs: EPC2015, EPC2014, EPC2012  

NASA Technical Reports Server (NTRS)

Heavy ion testing of newly available eGaN FETs from EPC were tested in May of 2012 at TAM. The EPC2001, EPC2012, and EPC2014 were tested for general single-event effect response from gold and xenon ions. Overall, the devices showed radiation degradation commensurate with breakdown in isolation oxides, and similar testing by EPC and Microsemi agrees with these data.

Scheick, Leif

2014-01-01

251

A Clinical Grade Sequencing-Based Assay for CEBPA Mutation Testing: Report of a Large Series of Myeloid Neoplasms.  

PubMed

Diagnostic testing for CEBPA mutations is the standard of care for cytogenetically normal acute myeloid leukemia. Widespread implementation of this testing is hampered by technical challenges associated with the GC content of the gene, the variability of the mutations, and the complexity of the sequence analysis and variant interpretation. We developed a robust Sanger-sequencing test to detect CEBPA mutations in diagnostic acute myeloid leukemia specimens. Our experience with testing 2393 cases of suspected myeloid neoplasms is presented. NPM1, FLT3-internal tandem duplication (ITD), and FLT3-D835 mutation status were determined in parallel; 160 (6.7%) cases harbored CEBPA mutations, including 86 with a single mutation and 74 with double mutations. Nineteen single-mutant cases and 3 double-mutant cases showed only nucleotide substitutions that could not be detected by fragment-analysis-based tests. A subset of cases harbored double mutations with uneven mutant allele frequency and required careful interpretation because of possible leukemic heterogeneity. NPM1 and FLT3-ITD mutations were more frequent in single- compared with double-mutation cases (31% versus 5% for NPM1, and 28% versus 16% for FLT3-ITD). This sequencing-based assay provides an efficient and reliable CEBPA mutation testing platform, permitting detection of all mutations with immediate distinction of single- and double-mutation cases. Given the technical challenges, robust Sanger-sequencing assays continue to maintain an important role in clinical CEBPA testing despite the development of multigene next-generation sequencing assays. PMID:25468431

Behdad, Amir; Weigelin, Helmut C; Elenitoba-Johnson, Kojo S J; Betz, Bryan L

2015-01-01

252

77 FR 72868 - Compliance Guidance for Small Business Entities on Labeling and Effectiveness Testing; Sunscreen...  

Federal Register 2010, 2011, 2012, 2013

...effectiveness testing. The effectiveness testing consists of a sun protection factor (SPF) Test and a Broad Spectrum (ultraviolet A (UVA) and ultraviolet B (UVB) protection) Test. In addition, a test demonstrating water resistance that accompanies the...

2012-12-06

253

Magnetocaloric effect of Gd{sub 4}(Bi{sub x}Sb{sub 1{minus}x}){sub 3} alloy series  

SciTech Connect

Alloys from the Gd{sub 4}(Bi{sub x}Sb{sub 1{minus}x}){sub 3} series were prepared by melting a stoichiometric amounts of pure metals in an induction furnace. The crystal structure is of the anti-Th{sub 3}P{sub 4} type (space group I{bar 4}3d) for all the compounds tested. The linear increase of the lattice parameters with Bi concentration is attributed to the larger atomic radius of Bi than that of Sb. Magnetic measurements show that the alloys order ferromagnetically from 266K to 330K, with the ordering temperature increasing with decreasing Bi concentration. The alloys are soft ferromagnets below their Curie temperatures, and follow the Curie-Weiss law above their ordering temperatures. The paramagnetic effective magnetic moments are low compared to the theoretical value for a free Gd{sup 3+}, while the ordered magnetic moments are close to the theoretical value for Gd. The alloys exhibit a moderate magnetocaloric effect (MCE) whose maxima are located between 270K and 338K and have relatively wide peaks. The peak MCE temperature decreases with decreasing Bi concentration while the peak height increases with decreasing Bi concentration. The Curie temperatures determined from inflection points of heat capacity are in good agreement with those obtained from the magnetocaloric effect. The MCE results obtained from the two different methods (magnetization and heat capacity) agree quite well with each other for all of the alloys in the series.

Niu, Xuejun

1999-12-01

254

Effects of Sweet Bee Venom Pharmacopuncture Treatment for Chemotherapy-Induced Peripheral Neuropathy: A Case Series  

Microsoft Academic Search

Objective. This is a case series reporting safety and degree of response to 1 dose level of sweet bee venom pharmacopuncture (SBVP) or melittin as a symptom-control therapy for chemotherapy-induced peripheral neuropathy (CIPN). Setting. All treatments were conducted at the East West Cancer Center (EWCC), Dunsan Oriental Hospital, Daejeon University, Republic of Korea, an institution that uses complementary therapies for

Jae-Woo Park; Ju-Hyun Jeon; Jeungwon Yoon; Tae-Young Jung; Ki-Rok Kwon; Chong-Kwan Cho; Yeon-Weol Lee; Stephen Sagar; Raimond Wong; Hwa-Seung Yoo

2012-01-01

255

Reversal of the Hofmeister Series: Specific Ion Effects on Peptides Jana Paterova,  

E-print Network

, they salt-out proteins from aqueous solutions. By contrast, weakly hydrated chao- tropes are not able to proteins, which facilitates their hydration.4 There are, however, at least two serious problems on proteins and the corresponding Hofmeister series by describing only the behavior of the aqueous ions

256

BIOLOGIC EFFECTS OF LOW-LEVEL IONIZING RADIATION: DISTINGUISHED LECTURER SERIES  

EPA Science Inventory

This represents the first in a series of lectures sponsored by the Agency to present a range of perspectives on controversial environmental and health issues from the vantage points of distinguished scientists. The views expressed are, therefore, not necessarily the views of the ...

257

Effects of Series Resistance and Inductance on Solar Cell Admittance Measurements(a)  

E-print Network

cells. The model circuit consists of a capacitance C in parallel with a resistance r circuit consisting of a capacitance (C) in parallel with a shunt resistance (r), with these in series admittance of a four-element circuit is calculated and compared with measurements on two typical CIGS solar

Scofield, John H.

258

Fluid dynamics test method  

NASA Technical Reports Server (NTRS)

Test method and apparatus determine fluid effective mass and damping in frequency range where effective mass may be considered as total mass less sum of slosh masses. Apparatus is designed so test tank and its mounting yoke are supported from structural test wall by series of flexures.

Gayman, W. H.

1974-01-01

259

Effects of changes in observational sites position and surrounding urbanisation on the temperature time series of the city of Trento  

NASA Astrophysics Data System (ADS)

Results from field measurements and numerical simulations are analysed to evaluate the spatial variability of near-surface temperature in the urban area of Trento in the Alps. The analysis aims at gaining information supporting the reconstruction of the series of temperature observations in the city, the earliest dating back to 1816: a challenging task, due to various relocations of the observatories and the increasing effects of urbanisation. The specifically designed field campaign was carried out from August 2009 to November 2010: five identical temperature sensors were placed at the sites of the historical observatories of Trento, to detect possible systematic differences between these places under various seasonal patterns and weather conditions. However, since differences measured nowadays may not be representative of those occurred in the past, numerical simulations were also run with the Weather Research and Forecasting (WRF) model, coupled with an advanced urban parameterization scheme, using a historical land use, reproducing early XX century urbanisation. Moreover, to test if the model is suitable to reproduce microclimatic differences in the urban area, simulations including the present land use, high-resolution urban morphology and anthropogenic heat sources were performed and compared against the observations carried out during the field campaign. The validation highlights that the model captures well the thermal field inside the urban area, as well as the average temperature differences between the urban sites, with mean absolute errors of order 1°C and 0.5°C respectively. However it reproduces poorly the variability connected with seasonality and weather conditions. Furthermore it is found that the model simulates well the typical features of the urban heat island, even though urbanisation effects tend to be overestimated. The analysis of the results of the "historical" simulations shows that temperature differences between the observatories more embedded in the urban area have not changed significantly from the past, probably due to similar changes in the surrounding urbanisation, whereas more relevant modifications have occurred at an observatory on the eastern sidewall of the valley, progressively incorporated in the urban area. Finally the comparison between "present" and "historical" simulations suggests that the progressive urbanisation has played a significant role on Trento temperature record in the last century, the effect being more significant under sunny conditions, when the urban heat island is stronger.

Giovannini, Lorenzo; Zardi, Dino; de Franceschi, Massimiliano

2014-05-01

260

CATSIB: A Modified SIBTEST Procedure To Detect Differential Item Functioning in Computerized Adaptive Tests. Law School Admission Council Computerized Testing Report. LSAC Research Report Series.  

ERIC Educational Resources Information Center

Computerized adaptive tests (CATs) pose major obstacles to the traditional assessment of differential item functioning (DIF). This paper proposes a modification of the SIBTEST DIF procedure for CATs, called CATSIB. CATSIB matches test takers on estimated ability based on unidimensional item response theory. To control for impact-induced Type I…

Nandakumar, Ratna; Roussos, Louis

261

Effect of the Botanical Compound LCS101 on Chemotherapy-Induced Symptoms in Patients with Breast Cancer: A Case Series Report  

PubMed Central

The treatment of breast cancer invariably results in severe and often debilitating symptoms that can cause significant distress and severely impair daily function and quality-of-life (QOL). We treated a series of 20 female breast cancer patients with the botanical compound LCS101 as adjuvant to conventional chemotherapy. At the end of the treatment regimen, patients rated their symptoms. 70% reported that they had either no or mildly severe levels of fatigue; 60% none to mildly severe weakness; 85% none to mildly severe pain; 70% none to mildly severe nausea; and 80% none to mildly severe vomiting. Only 20% reported severe impairment of overall function, and only 40% severely impaired QOL. No toxic effects were attributed by patients to the LCS101 treatment, and 85% reported that they believed the botanical compound had helped reduce symptoms. The effects of LCS101 on clinical outcomes in breast cancer should be tested further using randomized controlled trials. PMID:23400272

Samuels, Noah; Maimon, Yair; Zisk-Rony, Rachel Y.

2013-01-01

262

Effects of health information exchange adoption on ambulatory testing rates  

PubMed Central

Objective To determine the effects of the adoption of ambulatory electronic health information exchange (HIE) on rates of laboratory and radiology testing and allowable charges. Design Claims data from the dominant health plan in Mesa County, Colorado, from 1 April 2005 to 31 December 2010 were matched to HIE adoption data on the provider level. Using mixed effects regression models with the quarter as the unit of analysis, the effect of HIE adoption on testing rates and associated charges was assessed. Results Claims submitted by 306 providers in 69 practices for 34?818 patients were analyzed. The rate of testing per provider was expressed as tests per 1000 patients per quarter. For primary care providers, the rate of laboratory testing increased over the time span (baseline 1041 tests/1000 patients/quarter, increasing by 13.9 each quarter) and shifted downward with HIE adoption (downward shift of 83, p<0.01). A similar effect was found for specialist providers (baseline 718 tests/1000 patients/quarter, increasing by 19.1 each quarter, with HIE adoption associated with a downward shift of 119, p<0.01). Even so, imputed charges for laboratory tests did not shift downward significantly in either provider group, possibly due to the skewed nature of these data. For radiology testing, HIE adoption was not associated with significant changes in rates or imputed charges in either provider group. Conclusions Ambulatory HIE adoption is unlikely to produce significant direct savings through reductions in rates of testing. The economic benefits of HIE may reside instead in other downstream outcomes of better informed, higher quality care. PMID:23698257

Ross, Stephen E; Radcliff, Tiffany A; LeBlanc, William G; Dickinson, L Miriam; Libby, Anne M; Nease, Donald E

2013-01-01

263

Effect of copper content on corrosion behavior and chromate conversion coating protection of 7xxx series aluminum alloys  

NASA Astrophysics Data System (ADS)

The addition of Cu in Al-Zn-Mg alloys increases the mechanical strength and resistance to stress corrosion cracking of 7xxx series aluminum alloys (AA7xxx). The peak aged T6 temper provides the maximum mechanical strength by precipitation hardening. However, the presence of noble Cu makes AA7xxx-T6 more susceptible to localized corrosion, such as pitting, crevice and intergranular corrosion (IGC). In order to protect AA7xxx-T6 from localized corrosion, protective chromate conversion coatings (CCCs) must be used. Cu has been reported to affect the CCC protection performance. The exact roles of Cu content in corrosion behavior and CCC protection of AA7xxx-T6 are the focus of this study. Polarization and Electrochemical Impedance Spectroscopy (EIS) approaches were used in combination with materials characterization techniques, such as Focused Ion Beam (FIB), SEM, TEM, High Resolution TEM (HRTEM), Scanning TEM (STEM), and X-ray Photoelectron Spectrometry (XPS). Electrochemical tests on AA7xxx-T6 with various Cu content in deaerated chloride solution found that all alloys except for essentially Cu-free AA7004-T6 had two breakdown potentials, which increased logarithmically with increasing Cu content. Transient dissolution of the fine hardening precipitates and the surrounding solid solution in a thin surface layer was found in the Cu-containing alloys polarized at potentials between the two breakdown potentials. Stable dissolution associated with combined IGC and selective grain attack was found above the second breakdown potential. EIS tests revealed that the overall influence of Cu on the corrosion behavior was detrimental due to Cu enrichment in aerated chloride solution. TEM and STEM analysis revealed that CCC was heterogeneous on the heterogeneous microstructure of AA7075-T6. The coatings formed on coarse intermetallic particles were much thinner than CCC formed on the matrix. It was found that the CCC formed on the matrix mainly consisted of a CrIIIOOH backbone and chemisorbed HCrVIO4-. A sol-gel model for CCC formation was supported by the observations in this study. Finally the Cu content can have different effects on CCC protection: Cu is beneficial to CCC protection for coatings formed on polished AA7xxx-T6, but Cu is detrimental if it is enriched on the surface prior to CCC formation.

Meng, Qingjiang

264

Random Effects Structure for Confirmatory Hypothesis Testing: Keep It Maximal  

ERIC Educational Resources Information Center

Linear mixed-effects models (LMEMs) have become increasingly prominent in psycholinguistics and related areas. However, many researchers do not seem to appreciate how random effects structures affect the generalizability of an analysis. Here, we argue that researchers using LMEMs for confirmatory hypothesis testing should minimally adhere to the…

Barr, Dale J.; Levy, Roger; Scheepers, Christoph; Tily, Harry J.

2013-01-01

265

The Effect of Black Peers on Black Test Scores  

ERIC Educational Resources Information Center

Recent studies have used increasingly complex methodologies to estimate the effect of peer characteristics--race, poverty, and ability--on student achievement. A paper by Hanushek, Kain, and Rivkin using Texas state testing data has received particularly wide attention because it found a large negative effect of school percent black on black math…

Armor, David J.; Duck, Stephanie

2007-01-01

266

Testing Hypotheses on Specific Environmental Causal Effects on Behavior  

Microsoft Academic Search

There have been strong critiques of the notion that environmental influences can have an important effect on psychological functioning. The substance of these criticisms is considered in order to infer the methodological challenges that have to be met. Concepts of cause and of the testing of causal effects are discussed with a particular focus on the need to consider sample

Michael Rutter; Andrew Pickles; Robin Murray; Lindon Eaves

2001-01-01

267

Major results from safety-related integral effect tests with VISTA-ITL for the SMART design  

SciTech Connect

A series of integral effect tests (IETs) was performed by the Korea Atomic Energy Research Inst. (KAERI) using the VISTA integral test loop (VISTA-ITL) as a small-scale IET program. Among them this paper presents major results acquired from the safety-related IETs with the VISTA-ITL facility for the SMART design. Three small-break loss-of-coolant accident (SBLOCA) tests of safety injection system (SIS) line break, shutdown cooling system (SCS) line break and pressurizer safety valve (PSV) line break were successfully performed and the transient characteristics of a complete loss of flowrate (CLOF) was simulated properly with the VISTA-ITL facility. (authors)

Park, H. S.; Min, B. Y.; Shin, Y. C.; Yi, S. J. [Thermal Hydraulics Safety Research Div., Korea Atomic Energy Research Inst., 1045 Daedeokdaero, Yuseong-gu, Daejeon, 305-353 (Korea, Republic of)

2012-07-01

268

Effect of load introduction in compression testing of composite laminates  

NASA Technical Reports Server (NTRS)

Compression testing of composite materials is affected by the manner in which the compressive load is introduced. Two such effects are studied in this paper: (a) the constrained edge effect, in which transverse expansion of the edges is prevented while the axial load is introduced, and (b) nonuniform gripping, as manifested by inplane bending of the test specimen. The principle of minimum complementary energy is used to develop an analytical model that quantifies these two effects upon the measured elastic properties of laminated composites. Numerical results are presented for selected high-strength graphite/epoxy composites.

Reiss, R.; Clark, R. K.; Yao, T.-M.

1983-01-01

269

An effect of base hole size on dynamic test results  

NASA Astrophysics Data System (ADS)

This paper presents the dynamic test results of a flat-base sharp cone model hole diameters. The test Mach number is M = 5.047; cone semiangle is 10 deg; and the free-flow Reynolds number based on the model length is (2.2-13.3) x 10 to the 6th. The results show that the effect of the base hole diameter on test data really exists. In general, when the boundary-layer transition occurs on the aft surface of the model, the effect is obvious; with increasing hole diameter the static stability decreases and the dynamic stability increases. When the transition moves forward, the effect becomes unimportant. The mechanism of the effect is discussed briefly.

Lou, H.

1986-06-01

270

Effects of dating errors on nonparametric trend analyses of speleothem time series  

NASA Astrophysics Data System (ADS)

A fundamental problem in paleoclimatology is to take fully into account the various error sources when examining proxy records with quantitative methods of statistical time series analysis. Records from dated climate archives such as speleothems add extra uncertainty from the age determination to the other sources that consist in measurement and proxy errors. This paper examines three stalagmite time series of oxygen isotopic composition (?18O) from two caves in western Germany, the series AH-1 from the Atta Cave and the series Bu1 and Bu4 from the Bunker Cave. These records carry regional information about past changes in winter precipitation and temperature. U/Th and radiocarbon dating reveals that they cover the later part of the Holocene, the past 8.6 thousand years (ka). We analyse centennial- to millennial-scale climate trends by means of nonparametric Gasser-Müller kernel regression. Error bands around fitted trend curves are determined by combining (1) block bootstrap resampling to preserve noise properties (shape, autocorrelation) of the ?18O residuals and (2) timescale simulations (models StalAge and iscam). The timescale error influences on centennial- to millennial-scale trend estimation are not excessively large. We find a "mid-Holocene climate double-swing", from warm to cold to warm winter conditions (6.5 ka to 6.0 ka to 5.1 ka), with warm-cold amplitudes of around 0.5‰ ?18O; this finding is documented by all three records with high confidence. We also quantify the Medieval Warm Period (MWP), the Little Ice Age (LIA) and the current warmth. Our analyses cannot unequivocally support the conclusion that current regional winter climate is warmer than that during the MWP.

Mudelsee, M.; Fohlmeister, J.; Scholz, D.

2012-10-01

271

Effects of dating errors on nonparametric trend analyses of speleothem time series  

NASA Astrophysics Data System (ADS)

A fundamental problem in paleoclimatology is to take fully into account the various error sources when examining proxy records with quantitative methods of statistical time series analysis. Records from dated climate archives such as speleothems add extra uncertainty from the age determination to the other sources that consist in measurement and proxy errors. This paper examines three stalagmite time series of oxygen isotopic composition (?18O) from two caves in Western Germany, the series AH-1 from the Atta cave and the series Bu1 and Bu4 from the Bunker cave. These records carry regional information about past changes in winter precipitation and temperature. U/Th and radiocarbon dating reveals that they cover the later part of the Holocene, the past 8.6 thousand years (ka). We analyse centennial- to millennial-scale climate trends by means of nonparametric Gasser-Müller kernel regression. Error bands around fitted trend curves are determined by combining (1) block bootstrap resampling to preserve noise properties (shape, autocorrelation) of the ?18O residuals and (2) timescale simulations (models StalAge and iscam). The timescale error influences on centennial- to millennial-scale trend estimation are not excessively large. We find a "mid-Holocene climate double-swing", from warm to cold to warm winter conditions (6.5 ka to 6.0 ka to 5.1 ka), with warm-cold amplitudes of around 0.5‰ ?18O; this finding is documented by all three records with high confidence. We also quantify the Medieval Warm Period (MWP), the Little Ice Age (LIA) and the current warmth. Our analyses cannot unequivocally support the conclusion that current regional winter climate is warmer than that during the MWP.

Mudelsee, M.; Fohlmeister, J.; Scholz, D.

2012-05-01

272

Radiation thermometer size-of-source effect testing using aperture  

SciTech Connect

Size-of-source effect is an important attribute of any radiation thermometer. The effects of this attribute may be quantified in a number of different ways to include field-of-view, distance ratio, or size-of-source effect. These parameters provide needed information for the user of a radiation thermometer, as they aid in determining whether the measured object is large enough for adequate radiation thermometry measurement. Just as important, these parameters provide needed information for calibration. This information helps to determine calibration geometry, and it is needed for calibration uncertainty determination. For determination of size-of-source effect, there are a limited number of test methods furnished by the standards available today. The test methods available may be cumbersome to perform due to the cost of the required equipment and the time needed to set-up and perform the test. Other methods have been proposed. This paper discusses one such method. This method uses a circular aperture such as that used in radiation thermometer calibration. It describes the method both theoretically and mechanically. It then discusses testing done to verify this method comparing the results to those obtained while performing steps in current standards. Finally, based on this testing, the basis for a new standard test method is presented.

Liebmann, F.; Kolat, T. [Fluke Corporation, 799 E Utah Valley Dr., American Fork, Utah, USA, 84003 (United States)] [Fluke Corporation, 799 E Utah Valley Dr., American Fork, Utah, USA, 84003 (United States)

2013-09-11

273

Effects of automatic item eliminations based on item test analysis  

NSDL National Science Digital Library

Item test analysis is an aid to identify items that need to be eliminated from an assessment. An automatic elimination procedure based on item statistics, therefore, could help to increase the quality of a test in an objective manner. This was investigated by studying the effect of a standardized elimination procedure on the test results of a second-year course over a period of 6 successive years in 1,624 candidates. Cohort effects on the item elimination were examined by determining the number of additional items that had to be eliminated from three different tests in 3 successive academic years in two cohorts. The items that were part of more than one test and had to be eliminated according to the procedure in at least one of the tests appeared to have to be retained according to the same procedure in most of the other tests. The procedure harmed the high scoring students relatively more often than the other students, and the number of eliminated items appeared to be cohort dependent. As a consequence, automatic elimination procedures obscure the transparency of the grading process unacceptably and transform valid tests into inadequate samples of the course content.

Jaap HJ Muntinga (University of Groningen Medical Physiology); Henk A Schuil (University of Groningen Medical Physiology)

2007-09-08

274

South Carolina Statewide Testing Program 1977-78. General Report. Office of Research Report Series. Volume One/Number 40.  

ERIC Educational Resources Information Center

The results and methodology of the South Carolina 1977-78 statewide spring testing program for grades 3, 6, and 11 are presented and discussed. The discussion of the results focuses on a comparison of the 1978 results to national norms, a comparison of 1978 to 1977 results, a performance comparison across grade levels, and a comparison of skill…

Busbee, Cyril B.

275

Two-Dimensional Air-Flow Tests of the Effect of ITA Flowliner Slot Modification by Grinding/Polishing on Edge Tone Generation Potential  

NASA Technical Reports Server (NTRS)

Hersh Walker Acoustics (HWA) has performed a series of wind tunnel tests to support crack-repair studies for ITA flowliner vent slots. The overall goal of these tests is to determine if slot shape details have a significant influence on the propensity of the flowliner to produce aero-acoustic oscillations that could increase unsteady stresses on the flowliner walls. The test series, conducted using a full-scale two-dimensional model of a six-slot segment of the 38 slot liner, was intended to investigate the effects of altering slot shape by grinding away cracked portions.

Sutliff, Daniel L. (Technical Monitor); Walker, Bruce E.

2004-01-01

276

Time-series analysis of participation in nonresident hunting: the effects of license cost and quantitative fluctuations in supply.  

E-print Network

TIME -SERIES ANAI, YSIS OI' PARTICIPATION IN NQiIRESI DEN I. ' HUNTING: Tl-;E EFFECTS OI LICENSE COST ANI3 QUANTITATIVE I LUC fUWTIONS IN SVPPI. Y A lil*sis by ANTHONY PETER MAZZACCARO Subrnittc. d to the Gracluate College of Teresa ARM Unic... in Nonresident Hunting: The Effects of License Cost and Quantitative Fluctuations in Supply. (May 1974) Anthony Peter Mazzaccaro, B. S. , University of Maryland Chairnran of Advisory Committee: Dr. C. S, Van Doren The purpose of this study was to delineate...

Mazzaccaro, Anthony Peter

1974-01-01

277

For GSE Master's Degree Students -What New York State Certification Exams Am I Required to Take? ("X" means required, and CST required tests are noted as applicable. Information about the new series of New York State  

E-print Network

://www.nystce.nesinc.com/NY_annProgramUpdate.asp). GSE Program Educating All Students (EAS) Academic Literacy Skills Test (ALST) Education Teacher? ("X" means required, and CST required tests are noted as applicable. Information about the new series of New York State Teacher Certification Tests can be found at: http

Suzuki, Masatsugu

278

In vitro binding affinities of a series of flavonoids for ?-opioid receptors. Antinociceptive effect of the synthetic flavonoid 3,3-dibromoflavanone in mice.  

PubMed

The pharmacotherapy for the treatment of pain is an active area of investigation. There are effective drugs to treat this problem, but there is also a need to find alternative treatments free of undesirable side effects. In the present work the capacity of a series of flavonoids to bind to the ? opioid receptor was evaluated. The most active compound, 3,3-dibromoflavanone (31), a synthetic flavonoid, presented a significant inhibition of the binding of the selective ? opioid ligand [(3)H]DAMGO, with a Ki of 0.846 ± 0.263 ?M. Flavanone 31 was further synthesized using a simple and cheap procedure with good yield. Its in vivo effects in mice, after acute treatments, were studied using antinociceptive and behavioral assays. It showed no sedative, anxiolytic, motor incoordination effects or inhibition of the gastrointestinal transit in mice at the doses tested. It evidenced antinociceptive activity on the acetic acid-induced nociception, hot plate and formalin tests (at 10 mg/kg and 30 mg/kg). The results showed that the 5-HT2 receptor and the adrenoceptors seem unlikely to be involved in its antinociceptive effects. Naltrexone, a nonselective opioid receptors antagonist, totally blocked compound 31 antinociceptive effects on the hot plate test, but naltrindole (? opioid antagonist) and nor-binaltorphimine (? opioid antagonist) did not. These findings demonstrated that 3,3-dibromoflavanone (31), at doses that did not interfere with the motor performance, exerted clear dose dependent antinociception when assessed in the chemical and thermal models of nociception in mice and it seems that its action is related to the activation of the ? opioid receptor. PMID:23624290

Higgs, Josefina; Wasowski, Cristina; Loscalzo, Leonardo M; Marder, Mariel

2013-09-01

279

Effects of Response Instructions on Faking a Situational Judgment Test  

Microsoft Academic Search

A situational judgment test (SJT) and a Big 5 personality test were administered to 203 participants under instructions to respond honestly and to fake good using a within-subjects design. Participants indicated both the best and worst response (i.e., Knowledge) and the most likely and least likely response (i.e., Behavioral Tendency) to each situation. Faking effect size for the SJT Behavioral

Nhung T. Nguyen; Michael D. Biderman; Michael A. McDaniel

2005-01-01

280

Assessment of the prozone effect in malaria rapid diagnostic tests  

Microsoft Academic Search

BACKGROUND: The prozone effect (or high doses-hook phenomenon) consists of false-negative or false-low results in immunological tests, due to an excess of either antigens or antibodies. Although frequently cited as a cause of false-negative results in malaria rapid diagnostic tests (RDTs), especially at high parasite densities of Plasmodium falciparum, it has been poorly documented. In this study, a panel of

Philippe Gillet; Marcella Mori; Marjan Van Esbroeck; Jef Van den Ende; Jan Jacobs

2009-01-01

281

Test and evaluation of the Argonne BPAC10 Series air chamber calorimeter designed for 20 minute measurements  

SciTech Connect

This paper is the final report on DOE-OSS Task ANLE88002 Fast Air Chamber Calorimetry.'' The task objective was to design, construct, and test an isothermal air chamber calorimeter for plutonium assay of bulk samples that would meet the following requirements for sample power measurement: average sample measurement time less than 20 minutes. Measurement of samples with power output up to 10 W. Precision of better than 1% RSD for sample power greater than 1 W. Precision better than 0.010 watt SD, for sample power less than 1 W. This report gives a description of the calorimeter hardware and software and discusses the test results. The instrument operating procedure, included as an appendix, gives examples of typical input/output and explains the menu driven software. Sample measurement time of less than 20 minutes was attained by pre-equilibration of the samples in low cost precision preheaters and by prediction of equilibrium measurements. Tests at the TA55 Plutonium Facility at Los Alamos National Laboratory, on typical samples, indicates that the instrument meets all the measurement requirements.

Perry, R.B.; Fiarman, S.; Jung, E.A. (Argonne National Lab., IL (USA)); Cremers, T. (Los Alamos National Lab., NM (USA))

1990-10-01

282

Advances in series resonant inverter technology and its effect on spacecraft employing electric propulsion  

NASA Technical Reports Server (NTRS)

The efficiency of transistorized Series Resonant Inverters (SRIs), which is higher than that of silicon-controlled rectifier alternatives, reduces spacecraft radiator requirements by 40% and may eliminate the need for heat pipes on 30-cm ion thruster systems. Recently developed 10- and 25-kW inverters have potential applications in gas thrusters, and represent the first spaceborne SRI designs for such power levels. Attention is given to the design and control system approaches employed in these inverter designs to improve efficiency and reduce weight, along with the impact of such improved parameters on electric propulsion systems.

Robson, R. R.

1982-01-01

283

Instrumented impact testing machine with reduced specimen oscillation effects  

NASA Astrophysics Data System (ADS)

A pendulum-type instrumented Charpy test apparatus based on inverted test geometry was developed. Geometry inversion reduces inertia load and specimen oscillation effects. Initial impact energy is double that of standard (300 J) impact testers, allowing the use of larger (10 x 20 x 110 mm) bend specimens than normal Charpy specimens. The rotation axis in the three point bending is nearly stationary, making COD-measurements possible. Inertia effects and specimen oscillations are compared with the conventional tester, and using an analytical finite element model for Charpy V-notch specimens. Better performance for the inverted geometry is reported.

Rintamaa, R.; Ranka, K.; Wallin, K.; Ikonen, K.; Talja, H.; Kotilainen, H.; Sirkkola, E.

1984-07-01

284

Carry-over effect of a series of anomalous dry years on carbon and water exchange in a semi-arid Ponderosa Pine forest in the Pacific Northwest  

Microsoft Academic Search

The effect of a series of anomalous dry years (2001 - 2003) was investigated in the frame of continuous carbon, water and energy exchange measurements using the eddy covariance technique in a mature ponderosa pine forest over a period of 6 years (2002-2007). The annual precipitation in the series of dry years was -227 (-38%), -71 (-12%) and -197 mm

C. Thomas; B. E. Law; J. Irvine; J. Martin

2008-01-01

285

The testing effect as a function of explicit testing instructions and judgments of learning.  

PubMed

During study, people monitor their learning; the output of this monitoring is captured in so-called judgments of learning (JOLs). JOLs predict later recall better if they are made after a slight delay, instead of immediately after study (the delayed JOL effect). According to the self-fulfilling prophecy (SFP) hypothesis delayed JOLs are based on covert retrieval attempts from long-term memory, and successful retrieval attempts in themselves enhance learning (the testing effect). We compared memory for 40 Swahili-Swedish paired associates after a week as a function of three different learning conditions, namely study plus (i) explicitly instructed self-testing, (ii) delayed JOLs, or (iii) less self-testing. We showed that repeated delayed JOLs lead to a memory improvement that does not differ significantly from a comparable condition where the participants are explicitly testing memory, and both the latter groups performed reliably better than a group that self-tested less. The results suggest that delayed JOLs improve long-term retention as efficiently as explicit memory testing and lend support to the SFP hypothesis. PMID:22580409

Jönsson, Fredrik U; Hedner, Margareta; Olsson, Mats J

2012-01-01

286

A series of low-altitude aerial radiological surveys of selected regions within Areas 3, 5, 8, 9, 11, 18, and 25 at the Nevada Test Site  

SciTech Connect

A series of low-altitude, aerial radiological surveys of selected regions within Areas 3, 5, 8, 9, 11, 18,and 25 of the Nevada Test Site was conducted from December 1996 through June 1999. The surveys were conducted for the US Department of Energy by the Remote Sensing Laboratory, located in Las Vegas, Nevada, and maintained and operated by Bechtel Nevada. The flights were conducted at a nominal altitude of 15 meters above ground level along a set of parallel flight lines spaced 23 meters apart. The purpose of these low-altitude surveys was to measure, map, and define the areas of americium-241 activity. The americium contamination will be used to determine the areas of plutonium contamination. Americium-241 activity was detected within 8 of the 11 regions. The three regions where americium-241 was not detected were in the inactive Nuclear Rocket Development Station complex in Area 25, which encompassed the Test Cell A and Test Cell C reactor test stands and the Reactor Maintenance Assembly and Disassembly facility.

Colton, D.P.

1999-12-01

287

Carleton University, Technical Report SCE-04-02 September 2004 Assessing and Improving State-Based Class Testing: A Series of  

E-print Network

Benevento, Italy dipenta@unisannio.it Abstract This paper describes an empirical investigation of the cost effectiveness of well-known state- based testing techniques for classes or clusters of classes that exhibit is known about the effectiveness in practice of such criteria. Since faults are much less expensive when

Carleton University

288

Radiation effects testing at the 88-inch cyclotron at LBNL  

SciTech Connect

The effects of ionizing particles on sensitive microelectronics is an important component of the design of systems as diverse as satellites and space probes, detectors for high energy physics experiments and even internet server farms. Understanding the effects of radiation on human cells is an equally important endeavor directed towards future manned missions in space and towards cancer therapy. At the 88-Inch Cyclotron at the Berkeley Laboratory, facilities are available for radiation effects testing (RET) with heavy ions and with protons. The techniques for doing these measurements and the advantages of using a cyclotron will be discussed, and the Cyclotron facilities will be compared with other facilities worldwide. RET of the same part at several facilities of varying beam energy can provide tests of the simple models used in this field and elucidate the relative importance of atomic and nuclear effects. The results and implications of such measurements will be discussed.

McMahan, Margaret A.; Koga, Rokotura

2001-10-09

289

Further development for testing the effects of pesticides on wolf spiders.  

PubMed

Based on preliminary guidelines of the "Biologische Bundesanstalt für Land- und Forstwirtschaft" (BBA, Germany) for testing the effects of pesticides on wolf spiders (genus Pardosa, Lycosidae, Araneae), two test series were carried out with the pesticides Karate (a.i. lambda-cyhalothrin) and a noname product. At start of the test the pesticides were applied onto spiders and a sand substrate with an application apparatus. Thereafter, the mortality, the behavior, and the feeding rate were observed up to 14 days. Ninety-eight percent of the tested individuals belonged to the species Pardosa amentata. The results of the Karate experiments indicated a considerably higher reaction for males than for females. The aggression of the spiders proved to be a stress factor when the vessel was inhabited by more than one spider and caused higher mortality in individuals treated with pesticides. Spiders raised from cocoons in the laboratory were in general less sensitive than animals collected in the field and accustomed to laboratory conditions. Experiments performed with the noname pesticide in different seasons revealed that the sensitivity of the animals was influenced by their age. The parameters of mortality, behavior, and feeding rate proved to provide data adequate for evaluating the lethal and sublethal effects of the substances examined.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:7498066

Hof, A; Heimann, D; Römbke, J

1995-08-01

290

Chamber leakage effects on measured gas concentrations during contained demilitarization tests at NTS X-Tunnel  

SciTech Connect

A series of contained explosive detonation and propellant burn experiments was conducted during 1996 and 1997 using a specially constructed, large, underground chamber located in the X-tunnel complex at Area 25 of the Nevada Test Site (NTS).

Christopher R. Shadix; Joel Lipkin

1999-11-01

291

EFFECTS OF TESTS AND QUALITY CONTROL ON AIRCRAFT STRUCTURAL SAFETY  

Microsoft Academic Search

Uncertainty about material properties and analysis models is high when structures are being designed. Designing them for reasonable probabilities of failure with these high uncertainties is not feasible. Instead, the uncertainties are usually reduced before employing some measures including structural tests, quality control, maintenance and health monitoring. The importance of modeling the effects of these uncertainty reduction measures (URMs) during

Erdem Acar; Raphael T. Haftka; Nam-Ho Kim

292

EFFECT OF ADULT MALLARD AGE ON AVIAN REPRODUCTIVE TESTS  

EPA Science Inventory

The study was designed to determine the effect of using two different ages of mallard (Anas platyrhynchos) adults within the first breeding season on reproductive tests under standard Toxic Substances Control Act avian reproductive guidelines. The adult age groups were 7 and 11 m...

293

The Effectiveness of Mathematics Software for Ohio Proficiency Test Preparation.  

ERIC Educational Resources Information Center

Examines the use and effectiveness of software to help students pass the mathematics portion of the Ohio Ninth Grade Proficiency Test. Results indicated that administrative support, teachers' instructional style, teachers' perceived priority of learning about computers and software, computer availability and access, technical assistance, and…

Deubel, Patricia

2001-01-01

294

Compliance Testing for Random Effects Models With Joint Acceptance Criteria  

E-print Network

Compliance Testing for Random Effects Models With Joint Acceptance Criteria Crystal D. LINKLETTER Mathworks Natick, MA 01760 (Crystal.Linkletter@mathworks.com) C. DEVON LIN Queen's University Kingston, ON used for estimating variance components. KEY WORDS: Average criterion; Individual criterion; NIST

Ranjan, Pritam

295

Effects of hull form parameters on seakeeping for YTU gulet series with cruiser stern  

NASA Astrophysics Data System (ADS)

This study aims to identify the relations between seakeeping characteristics and hull form parameters for YTU Gulet series with cruiser stern. Seakeeping analyses are carried out by means of a computer software which is based on the strip theory and statistical short term response prediction method. Multiple regression analysis is used for numerical assessment through a computer software. RMS heave-pitch motions and absolute vertical accelerations on passenger saloon for Sea State 3 at head waves are investigated for this purpose. It is well known that while ship weight and the ratios of main dimensions are the primary factors on ship motions, other hull form parameters (CP, CWP, CVP, etc.) are the secondary factors. In this study, to have an idea of geometric properties on ship motions of gulets three different regression models are developed. The obtained outcomes provide practical predictions of seakeeping behavior of gulets with a high level of accuracy that would be useful during the concept design stage

Cakici, Ferdi; Aydin, Muhsin

2014-09-01

296

An effective approach for gap-filling continental scale remotely sensed time-series  

PubMed Central

The archives of imagery and modeled data products derived from remote sensing programs with high temporal resolution provide powerful resources for characterizing inter- and intra-annual environmental dynamics. The impressive depth of available time-series from such missions (e.g., MODIS and AVHRR) affords new opportunities for improving data usability by leveraging spatial and temporal information inherent to longitudinal geospatial datasets. In this research we develop an approach for filling gaps in imagery time-series that result primarily from cloud cover, which is particularly problematic in forested equatorial regions. Our approach consists of two, complementary gap-filling algorithms and a variety of run-time options that allow users to balance competing demands of model accuracy and processing time. We applied the gap-filling methodology to MODIS Enhanced Vegetation Index (EVI) and daytime and nighttime Land Surface Temperature (LST) datasets for the African continent for 2000–2012, with a 1 km spatial resolution, and an 8-day temporal resolution. We validated the method by introducing and filling artificial gaps, and then comparing the original data with model predictions. Our approach achieved R2 values above 0.87 even for pixels within 500 km wide introduced gaps. Furthermore, the structure of our approach allows estimation of the error associated with each gap-filled pixel based on the distance to the non-gap pixels used to model its fill value, thus providing a mechanism for including uncertainty associated with the gap-filling process in downstream applications of the resulting datasets. PMID:25642100

Weiss, Daniel J.; Atkinson, Peter M.; Bhatt, Samir; Mappin, Bonnie; Hay, Simon I.; Gething, Peter W.

2014-01-01

297

A study of the effect of nonrandom sampling on the estimation of exposure variability using exposure-time series from the OSHA IMIS health inspection database  

SciTech Connect

The objective of this study was to determine the effect of nonrandom sampling over time may have on the estimation of variability, namely the geometric standard deviation, using time series of personal exposure data.

Martinez, L.T.

1997-05-01

298

Time-series analysis of ion and isotope geochemistry of selected springs of the Nevada Test Site, Nye County, Nevada  

SciTech Connect

The temporal variations of ion and isotope geochemistry were observed at six selected springs on the Nevada Test Site, Nye County, Nevada and included: Cane, Whiterock, Captain Jack, Topopah, Tippipah, and Oak Springs. The sites were monitored from 1980 to 1982 and the following parameters were measured: temperature, pH, electrical conductance, discharge, cations (Ca{sup 2+}, Mg{sup 2+}. Na{sup +}, K{sup +}), anions Cl{sup {minus}}, SO{sub 4}{sup 2{minus}}. HCO{sub 3}{sup {minus}}, silica, stable isotopes ({delta}{sup 18}O, {delta}D, {delta}{sup 13}C), and radioactive isotopes ({sup 3}H, {sup 14}C). A more detailed study was continued from 1982 to 1988 at Cane and Whiterock Springs. Field microloggers were installed at these sites in 1985 to measure the high frequency response of temperature, electrical conductance, and discharge to local precipitation. Stage fluctuations near the discharge point dissolve minerals/salts as groundwater inundates the mineralized zone immediately above the equilibrium water table. This phenomena was most noticeable at Whiterock Spring and lagged the discharge response by several hours. Stable isotope analysis of precipitation and groundwater suggests a 1.5 to 2 month travel time for meteoric water to migrate from the recharge area to the discharge point. Groundwater age determinations suggest a mean age of approximately 30 years at Whiterock Spring and possibly older at Cane Spring. However, the short travel time and geochemical integrity of recharge pulses suggest that the waters are poorly mixed along the flow paths. 25 refs., 25 figs., 24 tabs.

Lyles, B.F.; Edkins, J.; Jacobson, R.L.; Hess, J.W.

1990-11-01

299

The effect of repeated testing on judgement biases in sheep.  

PubMed

Testing judgement biases of animals may provide insight into their affective states; however important questions about methodologies need to be answered. This experiment investigated the effect of repeated testing using unreinforced, ambiguous cues on the response of sheep to a go/no-go judgement bias test. Fifteen sheep were trained to differentiate between two locations, reinforced respectively with feed (positive) or with the presentation of a dog (negative). The responses to nine ambiguous locations, positioned between the positively and negatively reinforced locations, were tested repeatedly over 3 weeks. Sheep exhibited a symmetrical gradation in response to ambiguous locations between the positive and negative reinforcers. There was a significant decline (P=0.001) in the total number of approaches to the ambiguous positions over time (weeks). This effect of time suggests that sheep learnt that the ambiguous locations were unrewarded. This result supplies evidence of a limitation identified in current judgement bias methodology, due to repeated testing, which has the potential to provide misleading results. PMID:20117188

Doyle, Rebecca E; Vidal, Stephanie; Hinch, Geoff N; Fisher, Andrew D; Boissy, Alain; Lee, Caroline

2010-03-01

300

A linear theory of slug tests with annular effects  

NASA Astrophysics Data System (ADS)

SummaryWe derive a closed form theory of water level fluctuations caused by slug tests in a well with an annulus that extends to the piezometric surface. This hydraulics can be created by small diameter slug test equipment in a large diameter well, with an annulus established by borehole casing and the riser pipe of the equipment. The conservation of mass equation couples aquifer hydraulics, core hydraulics inside the riser pipe (which include inertia), and annular hydraulics outside the riser pipe (which include inertia and linear friction). The linear friction is needed to attenuate oscillations between the core and annulus, which would otherwise persist indefinitely after damping of aquifer discharge. A characteristic velocity is adopted for the annular friction, so that aquifer permeability is the sole calibration parameter. We calibrate the theory with overdamped and underdamped experiments run in a limestone aquifer at the Hydrogeological Experimental Site of Poitiers in France by Audouin, O., Bodin, J. 2007. Analysis of slug tests with high frequency oscillations. Journal of Hydrology 334, 282-289. The data and analytical theory yield plausible, accurate permeability estimates of 4.1 × 10 -12 and 1.7 × 10 -11 m 2. Portable, small diameter slug testing devices may accordingly be used in permanent, large diameter cased boreholes to estimate aquifer permeability, although the annular effects can obscure aquifer hydraulics. The annular effects may also occur in slug tests on wells with skins, bypasses, and packers, although different boundary and matching conditions would be needed to model this hydraulics.

Ostendorf, David W.; Zlotnik, Vitaly A.; DeGroot, Don J.

2009-04-01

301

Permutation Tests for Random Effects in Linear Mixed Models  

PubMed Central

Summary Inference regarding the inclusion or exclusion of random effects in linear mixed models is challenging because the variance components are located on the boundary of their parameter space under the usual null hypothesis. As a result, the asymptotic null distribution of the Wald, score, and likelihood ratio tests will not have the typical ?2 distribution. Although it has been proved that the correct asymptotic distribution is a mixture of ?2 distributions, the appropriate mixture distribution is rather cumbersome and nonintuitive when the null and alternative hypotheses differ by more than one random effect. As alternatives, we present two permutation tests, one that is based on the best linear unbiased predictors and one that is based on the restricted likelihood ratio test statistic. Both methods involve weighted residuals, with the weights determined by the among- and within-subject variance components. The null permutation distributions of our statistics are computed by permuting the residuals both within and among subjects and are valid both asymptotically and in small samples. We examine the size and power of our tests via simulation under a variety of settings and apply our test to a published data set of chronic myelogenous leukemia patients. PMID:21950470

Lee, Oliver E.; Braun, Thomas M.

2013-01-01

302

Effects of high energy simulated space radiation on polymeric second-surface mirrors. [thermal control coatings - performance tests  

NASA Technical Reports Server (NTRS)

A radiation effects experimental program was performed, in which second surface mirror type thermal control coatings were exposed to ultraviolet radiation, electrons, and protons simultaneously. Stability was assessed by making periodic spectral reflectance measurements in situ (and in air after testing for comparison). Solar absorption coefficients were derived by computer. Many of the exposed materials showed large amounts of degradation in reflectance absorptance, principally due to the electron exposure. A series of tests was conducted, leading to the identification of a modified second surface mirror that shows considerable improvement and promise for stability during thermal control applications in a charged particle space radiation environment.

Eogdall, L. B.; Cannaday, S. S.

1975-01-01

303

Effects of Introduced Materials in the Drift Scale Test  

SciTech Connect

Water samples previously acquired from superheated (>140 C) zones within hydrological test boreholes of the Drift Scale Test (DST) show relatively high fluoride concentrations (5-66 ppm) and low pH (3.1-3.5) values. In these high temperature regions of the rock, water is present superheated vapor only--liquid water for sampling purposes is obtained during the sampling process by cooling. Based on data collected to date, it is evident that the source of the fluoride and low pH is from introduced man-made materials (Teflon{trademark} and/or Viton{trademark} fluoroelastomer) used in the test. The test materials may contribute fluoride either by degassing hydrogen fluoride (HF) directly to produce trace concentrations of HF gas ({approx}0.1 ppm) in the high temperature steam, or by leaching fluoride in the sampling tubes after condensation of the superheated steam. HF gas is known to be released from Viton{trademark} at high temperatures (Dupont Dow Elastomers L.L.C., Elkton, MD, personal communication) and the sample water compositions indicate near stoichiometric balance of hydrogen ion and fluoride ion, indicating dissolution of HF gas into the aqueous phase. These conclusions are based on a series of water samples collected to determine if the source of the fluoride is from the degradation of materials originally installed to facilitate measurements. Analyses of these water samples show that the source of the fluoride is the introduced materials, that is the Viton{trademark} packers used to isolate test zones and/or Teflon{trademark} tubing used to draw water and steam from the test zones. In particular, water samples collected from borehole (BH) 72 high temperatures ({approx} 170 C) prior to introduction of any Viton{trademark} or Teflon{trademark} show pH Values (4.8 to 5.5) and fluoride concentrations well below 1 ppm over a period of six months. These characteristics are typical of condensing DST steam that contains only some dissolved carbon dioxide generated by water-mineral-gas reactions in the rock. With the introduction of the Viton{trademark} packer materials and Teflon{trademark} sampling tube in BH72, the water samples show pH values drop to 3.8, while fluoride rises to 2.4 ppm within three days. After nine days, the pH values reach as low as 3.4 and fluoride concentrations rise as high as 7.5 ppm in the collected samples. The background information describing the fluoride issue and a summary of the water collection activities along with the analytical results are provided below. The results of the field test confirm the hypothesis that the source of the fluoride in specific samples from the DST is the introduced test materials (i.e. Viton{trademark} and/or Teflon{trademark}). This is positive from the perspective of repository performance, particularly waste package and drip shield degradation behavior, as deleterious introduced materials would be avoided in an operating repository. Ongoing laboratory testing to be Completed in January 2002, and additional testing in BH72 and BH55 will address further details, such as the specific material introducing the fluorine and the material breakdown process.

DeLoach, L; Jones, RL

2002-01-11

304

Minimal preconditioning effects observed for inflation tests of planar tissues.  

PubMed

The purpose of this study is to investigate the effects of preconditioning on the deformation response of planar tissues measured by inflation tests. The inflation response of test specimens, including the bovine cornea, bovine and porcine sclera, and human skin, exhibited a negligible evolving deformation response when subjected to repeated pressure loading with recovery periods between cycles. Tissues obtained complete recovery to the reference state, and strain contours across the entire specimen were nearly identical at the maximum pressure of each load cycle. This repeatability was obtained regardless of strain history. These results suggest that negligible permanent change was induced in the microstructure by inflation testing. Additionally, we present data illustrating that a lack of a recovery period can result in an evolving deformation response to repeated loading that is commonly attributed to preconditioning. These results suggest that the commonly observed effects of preconditioning may be avoided by experimental design for planar tissues characterized by long collagen fibers arranged in the plane of the tissue. Specifically, if the test is designed to fully fix the specimen boundary during loading, adequate recovery periods are allowed after each load cycle, and loads are limited to avoid damage, preconditioning effects may be avoided for planar tissues. PMID:23897279

Tonge, Theresa K; Murienne, Barbara J; Coudrillier, Baptiste; Alexander, Stephen; Rothkopf, William; Nguyen, Thao D

2013-11-01

305

Effects of Salts of the Hofmeister Series on the Hydrogen Bond Network of Water  

PubMed Central

The effect of salts on water behavior has been a topic of interest for many years; however, some recent reports have suggested that ions do not influence the hydrogen bonding behavior of water. Using an effective two-state hydrogen bonding model to interpret the temperature excursion infrared response of the O-H stretch of aqueous salt solutions, we show a strong correlation between salt effects on water hydrogen bonding and the Hofmeister order. These data clearly show that salts do have a measurable impact on the equilibrium hydrogen bonding behavior of water and support models which explain Hofmeister effects on the basis of solute charge density. PMID:19847287

Vanderkooi, Jane M.

2009-01-01

306

Predicting the Effects of Test Media in Ground-Based Propulsion Testing  

NASA Technical Reports Server (NTRS)

This paper discusses the progress of work which began in mid-2004 sponsored by the Office of the Secretary of Defense (OSD) Test & Evaluation/Science & Technology (T&E/S&T) Program. The purpose of the work is to improve the state of the art of CFD capabilities for predicting the effects of the test media on the flameholding characteristics in scramjet engines. The program has several components including the development of advance algorithms and models for simulating engine flowpaths as well as a fundamental experimental and diagnostic development effort to support the formulation and validation of the mathematical models. The paper will provide details of current work involving the development of phenomenological models for Reynolds averaged Navier-Stokes codes, large-eddy simulation techniques and reduced-kinetics models. Experiments that will provide data for the modeling efforts will also be described, along with with the associated nonintrusive diagnostics used to collect the data.

Drummond, J. Philip; Danehy, Paul M.; Bivolaru, Daniel; Gaffney, Richard L.; Parker, Peter A.; Chelliah, Harsha K.; Cutler, Andrew D.; Givi, Peyman; Hassan, Hassan, A.

2006-01-01

307

PUMA-PCCS separate effect tests and RELAP5 code evaluation in PUMA  

NASA Astrophysics Data System (ADS)

One of the key areas in the design of advanced nuclear reactors is to develop a reliable Passive Containment Cooling System (PCCS). The purpose of the current work is to better understand the condensation phenomena in PCCS for the downward co-current flow of a steam/air mixture through condenser tube bundles during the three PCCS operational modes, namely the bypass mode, the cyclic venting mode and the long-term cooling mode. A series of unique separate-effect PCCS test data were obtained for condensation heat transfer in the PCCS heat exchangers of the PUMA (Purdue University Multidimensional Integral Test Assembly) facility under a task sponsored by the U.S. Nuclear Regulatory Commission. Test conditions includes bypass mode, cyclic venting mode and long term mode, covering a wide range of Loss of Coolant Accident(LOCA) conditions with a parameters of pressure, mass flow rate, noncondensable(NC) gases, and PCCS pool water level. The parametric effect studies and a further validation of the PUMA-PCCS separate effect test data were performed. The evaluation of a best estimate system code (RELAP5/MOD3.3) was performed by using unique PUMA-PCCS separate effects data and PUMA-Main Steam Line Break (MSLB) integral test (1998). Through a sensitivity studies of nodalization method and physical models on the MSLB test simulations, deficiencies in RELAP5/MOD3.3 code were found as follows: (1) over prediction of heat removal rate by condensation models, (2) overestimation of SP heat transfer through the horizontal venting line and thermal stratification distortion, (3) underestimation of NC gas effects in PCCS by the distortion of cyclic venting phenomena and (4) overestimation of the DW and SP wall condensation. The improvement for the code calculation predictions could be obtained by removing the RELAP5/MOD3.3 code deficient factors in the PUMA MSLB integral test simulation. The unique PCCS NC gas venting visualizations were obtained according to various PCCS inlet NC gas conditions. Through the local control volume analysis on the NC gas venting phenomena, the NC gas mass flow rate was obtained in the long term mode and the cyclic venting effects on the PCCS heat removal rate were analyzed. In addition, the estimation of mass and energy transfer through PCCS cyclic venting phenomena was studied by using Computational Fluid Dynamic (CFD) code simulation (FLUENT).

Choi, Sung Won

308

Random effects structure for confirmatory hypothesis testing: Keep it maximal  

PubMed Central

Linear mixed-effects models (LMEMs) have become increasingly prominent in psycholinguistics and related areas. However, many researchers do not seem to appreciate how random effects structures affect the generalizability of an analysis. Here, we argue that researchers using LMEMs for confirmatory hypothesis testing should minimally adhere to the standards that have been in place for many decades. Through theoretical arguments and Monte Carlo simulation, we show that LMEMs generalize best when they include the maximal random effects structure justified by the design. The generalization performance of LMEMs including data-driven random effects structures strongly depends upon modeling criteria and sample size, yielding reasonable results on moderately-sized samples when conservative criteria are used, but with little or no power advantage over maximal models. Finally, random-intercepts-only LMEMs used on within-subjects and/or within-items data from populations where subjects and/or items vary in their sensitivity to experimental manipulations always generalize worse than separate F1 and F2 tests, and in many cases, even worse than F1 alone. Maximal LMEMs should be the ‘gold standard’ for confirmatory hypothesis testing in psycholinguistics and beyond. PMID:24403724

Barr, Dale J.; Levy, Roger; Scheepers, Christoph; Tily, Harry J.

2013-01-01

309

A system to test the effects of materials on the electron drift lifetime in liquid argon and observations on the effect of water  

SciTech Connect

A materials test system (MTS) has been developed at FNAL to assess the suitability of materials for use in a large liquid argon time projection chamber. During development of the MTS, it was noted that controlling the cryostat pressure with a 'raining' condenser reduced the electron drift lifetime in the liquid argon. The effect of condensing has been investigated using a series of passive materials to filter the condensate. We report the results of these studies and of tests on different candidate materials for detector construction. The inferred reduction of electron drift lifetime by water concentrations in the parts per trillion is of particular interest.

Andrews, R.; Jaskierny, W.; Jostlein, H.; Kendziora, C.; Pordes, S.; Tope, T.; /Fermilab; ,

2009-07-01

310

Effect of pre-test genetic counseling for deaf adults on knowledge of genetic testing.  

PubMed

Empirical data on genetic counseling outcomes in the deaf population are needed to better serve this population. This study was an examination of genetics knowledge before and after culturally and linguistically appropriate pre-test genetic counseling in a diverse deaf adult sample. Individuals ?18 years old with early-onset sensorineural deafness were offered connexin-26/30 testing and genetic counseling. Participants completed questionnaires containing 10 genetics knowledge items at baseline and following pre-test genetic counseling. The effects of genetic counseling, prior beliefs about etiology, and participant's preferred language on genetics knowledge scores were assessed (n?=?244). Pre-test genetic counseling (p?=?.0007), language (p?test genetic counseling significantly improved deaf individuals' genetics knowledge. Assessing deaf individuals' prior beliefs is important for enhancing genetics knowledge. PMID:21818696

Baldwin, Erin E; Boudreault, Patrick; Fox, Michelle; Sinsheimer, Janet S; Palmer, Christina G S

2012-04-01

311

Experimental test results from an environmental protection agency test method for determination of vapor suppressant effectiveness  

NASA Astrophysics Data System (ADS)

The results obtained from laboratory experiments conducted using Environmental Protection Agency (EPA) subpart WWWW of 40 Code of Federal Regulations (CFR) part 63 (1)-test method are discussed in this article. The original test method was developed to measure the effectiveness of wax suppressants used to reduce hazardous air pollutant (HAP) emissions from unsaturated polyester (UP)/vinyl ester resins. Wax additions of ˜1.5% by weight to commercial UP resins suppress HAP emissions through the formation of surface barrier films. However, the tests performed in this study included the use of limestone and an adjunct, organic fiber reinforcement, rather than the wax. The addition of either commercial product to the UP formulations tested in this study was also shown to reduce HAP emissions. Suppression was a combination of absorption and an increased diffusion path barrier for the volatile organic carbon (VOC) components. Based on the limited data obtained, it was shown that the oil absorption characteristics of the two adjunct products could be used to estimate the expected level of vapor suppression for a specific resin formulation. Values reported in the literature for the oil adsorption characteristics of the adjunct limestone and the commercial biomass fiber were used in the laboratory tests. Although the oil adsorption characteristic of any ingredient added to a base resin formulation is indicative of its potential for emissions reduction, the EPA test protocol is still required to be performed for validation. Such screening tests will always be needed due to the variability associated with commercial UP resins and the evolution of customized UP/fiberglass composite formulations developed by custom molding shops.

Tock, Richard W.; Ahern, Daniel W.

2005-04-01

312

Sample Size for Joint Testing of Indirect Effects.  

PubMed

This paper presents methods to calculate sample size for evaluating mediation by joint testing of both links in an indirect pathway from exposure to mediator to outcome. Calculations rely on simulations of the underlying data structure, with testing of the two links performed under the simplifying assumption that the two test statistics are asymptotically independent. Simulations show that the proposed methods are accurate. Continuous and binary exposures and mediators, as well as continuous, binary, count, and survival outcomes are accommodated, along with over-dispersion of count outcomes, design effects, and confounding of the exposure-mediator and mediator-outcome relationships. An illustrative example is provided, and a documented R program implementing the calculations is available online. PMID:25418811

Vittinghoff, Eric; Neilands, Torsten B

2014-11-25

313

Comparison of test specific sediment effect concentrations with marine sediment quality assessment guidelines  

SciTech Connect

As part of NOAA`s National Status and Trends (NS and T) Bioeffects Assessment program and studies conducted by the National Biological Service, numerous sediment quality assessment surveys have recently been conducted along the Atlantic and Gulf coasts of the US using the sea urchin (Arbacia punctulata) fertilization and embryological development tests with pore water. Additional toxicity tests were also conducted in conjunction with most of these studies. The areas that have been sampled include Boston harbor, Massachusetts; Charleston Harbor, Winyah Bay, and Savannah River, South Carolina; St. Simon Sound, Georgia; Biscayne Bay, Tampa Bay, Choctawhatchee Bay, Apalachicola Bay, St. Andrew Bay, and Pensacola Bay, Florida; Galveston Bay, Lavaca Bay, and Sabine Lake, Texas, and 200 stations in the vicinity of offshore oil and gas production platforms in the Gulf of Mexico. Sufficient data are now available from this series of surveys to calculate test specific sediment effect concentrations (SECs). Based on these recent studies, SECs were developed for the sea urchin porewater and amphipod tests and compared with existing marine sediment quality assessment guidelines.

Carr, R.S.; Biedenbach, J.M. [National Biological Service, Corpus Christi, TX (United States). Marine Ecotoxicology Research Station; Long, E.R. [NOAA, Seattle, WA (United States); MacDonald, D.D. [MacDonald Environmental Sciences Ltd., Ladysmith, British Columbia (Canada)

1995-12-31

314

Corrosion Behavior of Titanate Ceramics in Short-Term MCC-1 Tests: The Effects of Surface Finish  

SciTech Connect

Two series of MCC-1 tests were designed and conducted to describe the effects of surface finish on the corrosion behavior of titanate ceramics. These effects are important for the comparison of short-term test results from different laboratories. Test samples were prepared with 240- and 600-grit finishes. Tests, conducted for 1, 3, 7, and 14 days at 90 C, were carried out in Teflon{reg_sign} vessels. Two different ceramics were used in this study: a Hf-Ce-Ce ceramic containing pyrochlore, perovskite, rutile and a small amount of a silicate phase, and a Hf-Ce-U ceramic containing pyrochlore and rutile. This study shows no detectable difference in the results of tests with ceramics finished to 240-grit and 600-grit; therefore, tests conducted at these two surface finishes can be directly compared. Due to its broader use, we recommend that short-term tests be conducted with monoliths finished to 600-grit. Comparison of data from blank tests in Teflon{reg_sign} and stainless steel vessels shows that the background associated with Teflon{reg_sign} vessels is lower. Therefore, we recommend that short-term tests be conducted in Teflon{reg_sign} vessels.

Bakel, A.J.; Basco, J.K.; Nole, M.K.; Chamberlain, D.B.

2000-07-28

315

Effects of topical bevacizumab application on early bleb failure after trabeculectomy: observational case series  

PubMed Central

Background The aim of this study was to evaluate the influence of topical bevacizumab on the formation and function of filtering blebs in eyes with early bleb failure after antiglaucoma surgery. Methods Of all patients who underwent mitomycin-augmented trabeculectomy for glaucoma in the Department of Ophthalmology at the Medical University in Lublin, Poland, between March 2009 and March 2010, a total of 21 eyes from 20 patients with injected filtration bleb 9.8 ± 4.7 days after surgery were included in this observational case series. All patients were treated with standard steroid therapy and topical bevacizumab 5 mg/mL five times a day for 20.9 ± 9.8 days. Patients were followed up every other day, and a full eye examination was performed 14, 30, 60, and 180 days after initiation of treatment. Blebs were evaluated for vascularity by slit-lamp examination with concomitant photographic documentation and intraocular pressure measurement. Results Elevated functional bleb with significantly reduced vascularity was present in 16 eyes, and was flat and nonfunctional in five eyes. Intraocular pressure in all eyes decreased from a mean of 26.6 ± 9.6 mmHg before surgery to 14.6 ± 7.7 mmHg and 15.8 ± 8.3 mmHg at 2 and 6 months after surgery, respectively. Filtration bleb leak was noted in three eyes while on treatment with bevacizumab. Conclusion Topical application of bevacizumab might favor functional bleb formation after trabeculectomy in eyes with a high risk of failure. PMID:24109173

Klos-Rola, Justyna; Tulidowicz-Bielak, Maria; Zarnowski, Tomasz

2013-01-01

316

KAERI Integral Effect Test Program and the ATLAS Design  

Microsoft Academic Search

The thermal-hydraulic integral effect test (IET) program is being progressed by the Korea Atomic Energy Research Institute. This paper presents an overview of the IET program; the scientific design characteristics of the IET facility; ATLAS, which is under construction; and the experimental and analytical validation works. The ATLAS facility has the following characteristics: (a) a 1\\/2-height, 1\\/288-volume, full-pressure simulation of

Won-Pil Baek; Chul-Hwa Song; Byong-Jo Yun; Tae-Soon Kwon; Sang-Ki Moon; Sung-Jae Lee

2005-01-01

317

Exploring regions of interest with cluster analysis (EROICA) using a spectral peak statistic for selecting and testing the significance of fMRI activation time-series  

Microsoft Academic Search

Much relevant information about activations and artifacts in a functional magnetic resonance imaging (fMRI) dataset can be obtained from an exploratory cluster analysis. In contrast to testing the significance of the measured experimental effect for a given model, unsupervised pattern recognition techniques, such as fuzzy clustering, often find unexpected behavior in addition to expected activations, allowing the exploitation of this

Mario Jarmasz; Ray L. Somorjai

2002-01-01

318

Temperature effect compensation for fast differential pressure decay testing  

NASA Astrophysics Data System (ADS)

To avoid the long temperature recovery period with differential pressure decay for leak detection, a novel method with temperature effect compensation is proposed to improve the testing efficiency without full stabilization of temperature. The mathematical model of conventional differential pressure decay testing is established to analyze the changes of temperature and pressure during the measuring period. Then the differential pressure is divided into two parts: the exponential part caused by temperature recovery and the linear part caused by leak. With prior information obtained from samples, parameters of the exponential part can be identified precisely, and the temperature effect will be compensated before it fully recovers. To verify the effect of the temperature compensated method, chambers with different volumes are tested under various pressures and the experiments show that the improved method is faster with satisfactory precision, and an accuracy less than 0.25 cc min-1 can be achieved when the compensation time is proportional to four times the theoretical thermal-time constant.

Shi, Yan; Tong, Xiaomeng; Cai, Maolin

2014-06-01

319

Effective Size Analysis of the Diametral Compression (Brazil) Test Specimen  

SciTech Connect

This study considers the finite element analysis (FEA) simulation and Weibull effective size analysis for the diametral compression (DC) or Brazil specimen loaded with three different push-rod geometries. Those geometries are a flat push-rod, a push-rod whose radius of curvature is larger than that for the DC specimen, and a push-rod whose radius of curvature matches that of the DC specimen. Such established effective size analysis recognizes that the tensile strength of structural ceramics is typically one to two orders of magnitude less than its compressive strength. Therefore, because fracture is much more apt to result from a tensile stress than a compressive one, this traditional analysis only considers the first principal tensile stress field in the mechanically loaded ceramic component for the effective size analysis. The effective areas and effective volumes were computed as function of Weibull modulus using the CARES/Life code. Particular attention was devoted to the effect of mesh sensitivity and localized stress concentration. The effect of specimen width on the stress state was also investigated. The effects of push-rod geometry, the use of steel versus WC push-rods, and considering a frictionless versus no-slip interface between push-rod and specimen on the maximum stresses, where those stresses are located, and the effective area and effective volume results are described. Of the three push-rod geometries, it is concluded that the push-rod (made from WC rather than steel) whose radius of curvature matches that of the DC specimen is the most apt to cause fracture initiation within the specimen's bulk rather than at the loading interface. Therefore, its geometry is the most likely to produce a valid diametral compression strength test. However, the DC specimen remains inefficient in terms of its area and volume efficiencies; namely, the tensile strength of only a few percent of the specimen's entire area or volume is sampled. Given the high probability that a valid (or invalid) test can be proven by ceramic fractographic practices suggests that this test method and specimen is questionable for use with relatively strong structural ceramics.

Jadaan, Osama M. [University of Wisconsin, Platteville; Wereszczak, Andrew A [ORNL

2009-04-01

320

Homogenising time series: beliefs, dogmas and facts  

NASA Astrophysics Data System (ADS)

In the recent decades various homogenisation methods have been developed, but the real effects of their application on time series are still not known sufficiently. The ongoing COST action HOME (COST ES0601) is devoted to reveal the real impacts of homogenisation methods more detailed and with higher confidence than earlier. As a part of the COST activity, a benchmark dataset was built whose characteristics approach well the characteristics of real networks of observed time series. This dataset offers much better opportunity than ever before to test the wide variety of homogenisation methods, and analyse the real effects of selected theoretical recommendations. Empirical results show that real observed time series usually include several inhomogeneities of different sizes. Small inhomogeneities often have similar statistical characteristics than natural changes caused by climatic variability, thus the pure application of the classic theory that change-points of observed time series can be found and corrected one-by-one is impossible. However, after homogenisation the linear trends, seasonal changes and long-term fluctuations of time series are usually much closer to the reality than in raw time series. Some problems around detecting multiple structures of inhomogeneities, as well as that of time series comparisons within homogenisation procedures are discussed briefly in the study.

Domonkos, P.

2011-06-01

321

Cardiovascular effects associated with air pollution: potential mechanisms and methods of testing.  

PubMed

A recent series of epidemiologic reports have shown associations between fine particulate matter (PM) levels and increased cardiovascular morbidity and mortality. Elevated PM levels have been linked with cardiac events, including serious ventricular arrhythmias and myocardial infarction. A workshop brought together epidemiologists, cardiologists, and toxicologists from academia, government, and industry to examine plausible mechanisms that could be responsible for such effects, and to consider the armamentarium of noninvasive tests available to examine these relationships. Possible mechanisms considered by the participants include: (a) effects on the autonomic nervous system; (b) alterations on ion channel function in myocardial cells; (c) ischemic responses in the myocardium; and (d) inflammatory responses triggering endothelial dysfunction, atherosclerosis, and thrombosis. A large number of tests were identified to assess specific mechanistic pathways underlying the cardiovascular effects of air pollution and include: (a) autonomic control of the cardiovascular system assessed primarily by heart-rate variability; (b) myocardial substrate and vulnerability assessed by the electrocardiogram and estimations of ejection fraction and wall motion abnormalities in imaging studies; and (c) endothelial function, atherosclerosis, and thrombosis assessed by clotting parameters, cytokines, lipid profiles, and forearm blood flow. A variety of approaches ranging from molecular and genetic investigations to human clinical studies were recommended to further investigate the important epidemiologic associations. PMID:12454788

Utell, Mark J; Frampton, Mark W; Zareba, Wojciech; Devlin, Robert B; Cascio, Wayne E

2002-12-01

322

Evaluating the biological effects of intermittent 1.9 GHz pulse-modulated radiofrequency fields in a series of human-derived cell lines.  

PubMed

Several recent studies have suggested that radiofrequency (RF) fields may cause changes in a variety of cellular functions that may eventually lead to potential long-term health effects. In the present study, we have assessed the ability of non-thermal RF-field exposure to affect a variety of biological processes (including apoptosis, cell cycle progression, viability and cytokine production) in a series of human-derived cell lines (TK6, HL60 and Mono-Mac-6). Exponentially growing cells were exposed to intermittent (5 min on, 10 min off) 1.9 GHz pulse-modulated RF fields for 6 h at mean specific absorption rates (SARs) of 0, 1 and 10 W/kg. Concurrent negative (incubator) and positive (heat shock for 1 h at 43 degrees C) controls were included in each experiment. Immediately after the 6-h exposure period and 18 h after exposure, cell pellets were collected and analyzed for cell viability, the incidence of apoptosis, and alterations in cell cycle kinetics. The cell culture supernatants were assessed for the presence of a series of human inflammatory cytokines (TNFA, IL1B, IL6, IL8, IL10, IL12) using a cytometric bead array assay. No detectable changes in cell viability, cell cycle kinetics, incidence of apoptosis, or cytokine expression were observed in any of RF-field-exposed groups in any of the cell lines tested, relative to the sham controls. However, the positive (heat-shock) control samples displayed a significant decrease in cell viability, increase in apoptosis, and alteration in cell cycle kinetics (G(2)/M block). Overall, we found no evidence that non-thermal RF-field exposure could elicit any detectable biological effect in three human-derived cell lines. PMID:17214515

Chauhan, V; Mariampillai, A; Kutzner, B C; Wilkins, R C; Ferrarotto, C; Bellier, P V; Marro, L; Gajda, G B; Lemay, E; Thansandote, A; McNamee, J P

2007-01-01

323

Why Do Some Children Benefit More from Testing than Others? Gist Trace Processing to Explain the Testing Effect  

ERIC Educational Resources Information Center

Retrieval practice of previously studied information seems to be more effective in the long run than restudying the information--a phenomenon called the "testing effect". In the present study, we investigated whether individual differences in the testing effect can be attributed to variation in gist trace processing. One-hundred-thirty-one…

Bouwmeester, Samantha; Verkoeijen, Peter P. J. L.

2011-01-01

324

49 CFR 40.273 - What is the effect of a cancelled alcohol test?  

Code of Federal Regulations, 2010 CFR

... false What is the effect of a cancelled alcohol test? 40.273 Section 40.273 Transportation...PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS Problems in Alcohol Testing § 40.273 What is the effect...

2010-10-01

325

49 CFR 40.273 - What is the effect of a cancelled alcohol test?  

Code of Federal Regulations, 2012 CFR

... false What is the effect of a cancelled alcohol test? 40.273 Section 40.273 Transportation...PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS Problems in Alcohol Testing § 40.273 What is the effect...

2012-10-01

326

49 CFR 40.273 - What is the effect of a cancelled alcohol test?  

Code of Federal Regulations, 2013 CFR

... false What is the effect of a cancelled alcohol test? 40.273 Section 40.273 Transportation...PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS Problems in Alcohol Testing § 40.273 What is the effect...

2013-10-01

327

Coronary computed tomography as a cost-effective test strategy for coronary artery disease assessment - a systematic review.  

PubMed

Cardiovascular imaging imparts a huge burden on healthcare spending. Coronary CT angiography (CCTA) may provide a cost effective means of diagnosing coronary artery disease (CAD) and reducing downstream cost of testing. We performed a systematic search of literature for randomized controlled trials or prospective or retrospective non-randomized comparative studies or case series, decision analytic models and technology reports in which some or all of the patients underwent CCTA and looking at the cost effectiveness, comparative effectiveness and downstream test utilization associated with the use of CCTA. We found 42 articles matching our criteria. CCTA either as first line or as a layering test may represent a cost effective strategy for initial evaluation of patients with CAD prevalence of 10%-50% in both near-term and long-term diagnostic periods. For CAD prevalence ?70%, ICA as initial test may represent cost effective strategy for diagnosis of stable chest pain. CCTA may represent cost-effective strategy when performed as a layering test to equivocal initial stress imaging before performing ICA. Use of CCTA is cost- and time-effective strategy for evaluation of low risk (<30% CAD prevalence) acute chest pain patients in emergency department and can be used for safe exclusion of acute coronary syndrome (ACS). Use of coronary calcium score as an initial test may require further evidence to be deemed cost-effective strategy. CCTA may represent a cost effective and may be associated with less downstream testing for diagnosis of stable chest pain patients in low to intermediate risk patients whereas for low risk acute chest pain patients, use of CCTA is associated with expedited patient management, less cost and safe exclusion of ACS. PMID:24769305

Zeb, Irfan; Abbas, Naeem; Nasir, Khurram; Budoff, Matthew J

2014-06-01

328

Impact of exposure measurement error in air pollution epidemiology: effect of error type in time-series studies  

PubMed Central

Background Two distinctly different types of measurement error are Berkson and classical. Impacts of measurement error in epidemiologic studies of ambient air pollution are expected to depend on error type. We characterize measurement error due to instrument imprecision and spatial variability as multiplicative (i.e. additive on the log scale) and model it over a range of error types to assess impacts on risk ratio estimates both on a per measurement unit basis and on a per interquartile range (IQR) basis in a time-series study in Atlanta. Methods Daily measures of twelve ambient air pollutants were analyzed: NO2, NOx, O3, SO2, CO, PM10 mass, PM2.5 mass, and PM2.5 components sulfate, nitrate, ammonium, elemental carbon and organic carbon. Semivariogram analysis was applied to assess spatial variability. Error due to this spatial variability was added to a reference pollutant time-series on the log scale using Monte Carlo simulations. Each of these time-series was exponentiated and introduced to a Poisson generalized linear model of cardiovascular disease emergency department visits. Results Measurement error resulted in reduced statistical significance for the risk ratio estimates for all amounts (corresponding to different pollutants) and types of error. When modelled as classical-type error, risk ratios were attenuated, particularly for primary air pollutants, with average attenuation in risk ratios on a per unit of measurement basis ranging from 18% to 92% and on an IQR basis ranging from 18% to 86%. When modelled as Berkson-type error, risk ratios per unit of measurement were biased away from the null hypothesis by 2% to 31%, whereas risk ratios per IQR were attenuated (i.e. biased toward the null) by 5% to 34%. For CO modelled error amount, a range of error types were simulated and effects on risk ratio bias and significance were observed. Conclusions For multiplicative error, both the amount and type of measurement error impact health effect estimates in air pollution epidemiology. By modelling instrument imprecision and spatial variability as different error types, we estimate direction and magnitude of the effects of error over a range of error types. PMID:21696612

2011-01-01

329

Effectiveness of cognitive remediation therapy (CRT) in anorexia nervosa: A case series  

Microsoft Academic Search

We investigated whether cognitive remediation therapy (CRT) is effective in improving cognitive flexibility in anorexia nervosa (AN). Twenty AN outpatients were consecutively recruited at the Eating Disorders Center of the Turin University. All participants completed 10 sessions of CRT. Neuropsychological performances improved with CRT. Data showed also a significant improvement of impulse regulation and interoceptive awareness (subscales of the Eating

Giovanni Abbate-Daga; Sara Buzzichelli; Enrica Marzola; Federico Amianto; Secondo Fassino

2012-01-01

330

Named Series: Epigenetics, Brain, Behavior, and Immunity Epigenetic perspective on the developmental effects of bisphenol A  

E-print Network

and function(s) of the endocrine system (Patisaul and Adewale, 2009). EDCs have been largely shown to produce development Behavior Immune Endocrine disruptor Transgenerational a b s t r a c t Bisphenol A (BPA effects and discuss the transgener- ational implications of exposure to endocrine disrupting chemicals. Ã?

Champagne, Frances A.

331

The Greenhouse Effect: A Selected Bibliography. Bibliography Series Twenty-two.  

ERIC Educational Resources Information Center

The purpose of this bibliography is to provide listings of articles, books, and documents which are available in the Robert E. Kennedy Library, California Polytechnic State University, and other libraries on the problem of the greenhouse effect published since 1980. Listings are organized as: (1) "Subject Headings"; (2) "Carbon Dioxide…

O'Neill, Gertrudis, Comp.

332

Toward Effective Public School Programs for Deaf Students: Context, Process, and Outcomes. Special Education Series.  

ERIC Educational Resources Information Center

This book's aim is to define and clarify the issues involved in the education of deaf and hard of hearing children in local public schools, to bring to light the accumulating research in this area, and to recommend actions for organizing effective educational programs. The book offers a perspective on the current confusion in the field of deaf…

Kluwin, Thomas N., Ed.; And Others

333

Communication for the Workplace: An Integrated Language Approach. Second Edition. Job Skills. Net Effect Series.  

ERIC Educational Resources Information Center

Using a developmental, hands-on approach, this text/workbook helps students master the basic English skills that are essential to write effective business correspondence, to recognize language errors, and to develop decision-making and problem-solving skills. Its step-by-step focus and industry-specific format encourages students to review,…

Ettinger, Blanche; Perfetto, Edda

334

Preparing Effective Special Education Teachers. What Works for Special-Needs Learners Series  

ERIC Educational Resources Information Center

What tools are in the toolkit of an excellent special educator, and how can teacher preparation programs provide these tools in the most efficient, effective way possible? This practical, clearly written book is grounded in current research and policy as well as the author's extensive experience as a teacher educator. It identifies what special…

Mamlin, Nancy

2012-01-01

335

The Effects of Instruction on College Nonmajors' Conceptions of Respiration and Photosynthesis. Research Series No. 164.  

ERIC Educational Resources Information Center

The processes of photosynthesis and respiration are basic to the understanding of many other aspects and functions of biological systems. Because of their curricular significance, these processes served as the focal point in an investigation of student conceptions and instructional effectiveness. In this study, students in a college nonscience…

Anderson, Charles W.; And Others

336

Accelerated test techniques for micro-circuits: Evaluation of high temperature (473 k - 573 K) accelerated life test techniques as effective microcircuit screening methods  

NASA Technical Reports Server (NTRS)

The application of high temperature accelerated test techniques was shown to be an effective method of microcircuit defect screening. Comprehensive microcircuit evaluations and a series of high temperature (473 K to 573 K) life tests demonstrated that a freak or early failure population of surface contaminated devices could be completely screened in thirty two hours of test at an ambient temperature of 523 K. Equivalent screening at 398 K, as prescribed by current Military and NASA specifications, would have required in excess of 1,500 hours of test. All testing was accomplished with a Texas Instruments' 54L10, low power triple-3 input NAND gate manufactured with a titanium- tungsten (Ti-W), Gold (Au) metallization system. A number of design and/or manufacturing anomalies were also noted with the Ti-W, Au metallization system. Further study of the exact nature and cause(s) of these anomalies is recommended prior to the use of microcircuits with Ti-W, Au metallization in long life/high reliability applications. Photomicrographs of tested circuits are included.

Johnson, G. M.

1976-01-01

337

Effects of temperature on mortality in Hong Kong: a time series analysis.  

PubMed

Although interest in assessing the impacts of hot temperature and mortality in Hong Kong has increased, less evidence on the effect of cold temperature on mortality is available. We examined both the effects of heat and cold temperatures on daily mortality in Hong Kong for the last decade (2002-2011). A quasi-Poisson model combined with a distributed lag non-linear model was used to assess the non-linear and delayed effects of temperatures on cause-specific and age-specific mortality. Non-linear effects of temperature on mortality were identified. The relative risk of non-accidental mortality associated with cold temperature (11.1 °C, 1st percentile of temperature) relative to 19.4 °C (25th percentile of temperature) was 1.17 (95 % confidence interval (CI): 1.04, 1.29) for lags 0-13. The relative risk of non-accidental mortality associated with high temperature (31.5 °C, 99th percentile of temperature) relative to 27.8 °C (75th percentile of temperature) was 1.09 (95 % CI: 1.03, 1.17) for lags 0-3. In Hong Kong, extreme cold and hot temperatures increased the risk of mortality. The effect of cold lasted longer and greater than that of heat. People older than 75 years were the most vulnerable group to cold temperature, while people aged 65-74 were the most vulnerable group to hot temperature. Our findings may have implications for developing intervention strategies for extreme cold and hot temperatures. PMID:25179530

Yi, Wen; Chan, Albert P C

2014-09-01

338

European Standard Series patch test results from a contact dermatitis clinic in Israel during the 7-year period from 1998 to 2004.  

PubMed

The results of a 7-year retrospective study (1998-2004) from patch testing with the European Standard Series (ESS) establishing the frequency of sensitization in a contact dermatitis clinic in Israel are presented. 23 allergens were patch tested on 2156 patients, 1462 females (67.8%) and 694 males (32.2%). Atopy and asthma were present in 21.9% of the patients. One or more allergic reactions were observed in 937 patients (43.5%). The highest yield of patch test positives from the 1076 positive reactions were obtained from nickel sulfate (13.9%), fragrance mix (7.1%), potassium dichromate (3.8%), Balsam of Peru (3.6%), CL+Me-isothiazolinone (3.4%) and cobalt chloride (3.4%). Allergens which produced the least amount of positive results were primin and clioquinol. Allergic contact dermatitis (ACD) was established in 32.8%, whereas occupationally related allergic (8.0) and irritant contact dermatitis (5.6%) affected a total of 13.6% of the cases studied. The most common clinical forms of dermatitis were chronic dermatitis (47.7%) followed by acute dermatitis (22.8%), and lichenification and hyperkeratosis (7.9%). The hands (30.7%), face and neck (23.9%) and extremities (11.3%) were the most frequently affected areas. Four allergens in our study differed from the top 10 allergens in Europe namely: Cl+Me-isothiazolinone, formaldehyde, 4-tert-butylphenol formaldehyde resin and sesquiterpene lactone mix reflecting an existing difference in environmental exposure. Our study is the first to provide data on the frequency of sensitization and important allergens in the aetiology of ACD in Israel. In spite of the existing differences with Europe, we conclude that ESS is an appropriate screening system for the diagnosis of ACD in Israel. PMID:16930229

Lazarov, Aneta

2006-08-01

339

3-D numerical evaluation of density effects on tracer tests.  

PubMed

In this paper we present numerical simulations carried out to assess the importance of density-dependent flow on tracer plume development. The scenario considered in the study is characterized by a short-term tracer injection phase into a fully penetrating well and a natural hydraulic gradient. The scenario is thought to be typical for tracer tests conducted in the field. Using a reference case as a starting point, different model parameters were changed in order to determine their importance to density effects. The study is based on a three-dimensional model domain. Results were interpreted using concentration contours and a first moment analysis. Tracer injections of 0.036 kg per meter of saturated aquifer thickness do not cause significant density effects assuming hydraulic gradients of at least 0.1%. Higher tracer input masses, as used for geoelectrical investigations, may lead to buoyancy-induced flow in the early phase of a tracer test which in turn impacts further plume development. This also holds true for shallow aquifers. Results of simulations with different tracer injection rates and durations imply that the tracer input scenario has a negligible effect on density flow. Employing model cases with different realizations of a log conductivity random field, it could be shown that small variations of hydraulic conductivity in the vicinity of the tracer injection well have a major control on the local tracer distribution but do not mask effects of buoyancy-induced flow. PMID:16183165

Beinhorn, M; Dietrich, P; Kolditz, O

2005-12-01

340

The origins of multifractality in financial time series and the effect of extreme events  

NASA Astrophysics Data System (ADS)

This paper presents the results of multifractal testing of two sets of financial data: daily data of the Dow Jones Industrial Average (DJIA) index and minutely data of the Euro Stoxx 50 index. Where multifractal scaling is found, the spectrum of scaling exponents is calculated via Multifractal Detrended Fluctuation Analysis. In both cases, further investigations reveal that the temporal correlations in the data are a more significant source of the multifractal scaling than are the distributions of the returns. It is also shown that the extreme events which make up the heavy tails of the distribution of the Euro Stoxx 50 log returns distort the scaling in the data set. The most extreme events are inimical to the scaling regime. This result is in contrast to previous findings that extreme events contribute to multifractality.

Green, Elena; Hanan, William; Heffernan, Daniel

2014-06-01

341

Testing  

MedlinePLUS

... curesma.org > learn about sma > causes & diagnoses > testing Testing An SMA diagnosis must be confirmed through genetic ... and must be identified through further testing. Prenatal Testing Prenatal testing is used to determine if a ...

342

Halogen effects on photoluminescence and catalytic properties: a series of spatially arranged trimetallic zinc(II) complexes.  

PubMed

Self-assembly of ZnX2 (X = Cl, Br, and I) with N,N',N''-tris(2-pyridinylethyl)-1,3,5-benzenetricarboxamide (L) as a tridentate N-donor ligand yields discrete C3-symmetric trimetallic zinc(II) complexes, [Zn3X6L(MeOH)3]. These form, via ????? interactions and NH????O=C hydrogen-bonds, an ensemble constituting a unique columnar stacking structure in an abab staggered fashion. For this series of complexes, the halogen effects on the photoluminescence, catalysis, and thermal properties were investigated. For [Zn3Cl6L(MeOH)3], a blue luminescence was observed at 462 nm (?ex = 369 nm). The transesterification catalysis showed significant halogen effects in the order [Zn3I6L(MeOH)3] > [Zn3Cl6L(MeOH)3] > [Zn3Br6L(MeOH)3] in methanol, whereas in a mixture of methanol and acetonitrile, the order was [Zn3I6L(MeOH)3] > [Zn3Br6L(MeOH)3] > [Zn3Cl6L(MeOH)3]. Such notable different effects among the three complexes might be explained by the halogens' electronic effects and dissociation properties. PMID:24442203

Lee, Haeri; Noh, Tae Hwan; Jung, Ok-Sang

2014-03-14

343

Effects of measurement resolution on the analysis of temperature time series for stream-aquifer flux estimation  

NASA Astrophysics Data System (ADS)

From its inception in the mid-1960s, the use of temperature time series (thermographs) to estimate vertical fluxes has found increasing use in the hydrologic community. Beginning in 2000, researchers have examined the impacts of measurement and parameter uncertainty on the estimates of vertical fluxes. To date, the effects of temperature measurement discretization (resolution), a characteristic of all digital temperature loggers, on the determination of vertical fluxes has not been considered. In this technical note we expand the analysis of recently published work to include the effects of temperature measurement resolution on estimates of vertical fluxes using temperature amplitude and phase shift information. We show that errors in thermal front velocity estimation introduced by discretizing thermographs differ when amplitude or phase shift data are used to estimate vertical fluxes. We also show that under similar circumstances sensor resolution limits the range over which vertical velocities are accurately reproduced more than uncertainty in temperature measurements, uncertainty in sensor separation distance, and uncertainty in the thermal diffusivity combined. These effects represent the baseline error present and thus the best-case scenario when discrete temperature measurements are used to infer vertical fluxes. The errors associated with measurement resolution can be minimized by using the highest-resolution sensors available. But thoughtful experimental design could allow users to select the most cost-effective temperature sensors to fit their measurement needs.

Soto-López, Carlos D.; Meixner, Thomas; Ferré, Ty P. A.

2011-12-01

344

Automated analysis of antidepressants' effect in the forced swim test.  

PubMed

The forced swim test (FST) is a commonly used procedure of preclinical screening of drugs for the antidepressant activity. It has high predictive validity for a large group of antidepressant drugs blocking serotonin and noradrenaline reuptakes and improvement of immobility time evaluation in the FST is an important problem of preclinical psychopharmacology. Here a new automated version of the FST was developed. This version includes 4 inventions: (1) transmitted lighting instead of reflected lighting, (2) mouse silhouette tracking, (3) automated choice of immobility threshold and (4) the permutation test of drug's effect. Experiment was carried out on adult males of C57BL/6J and BALB/cJ mouse strains. The mice were treated with tricyclic antidepressant imipramine (15 and 30 mg/kg, i.p.). Mouse was placed in water tank, its movements were recorded by a rater and the silhouette alterations were automatically tracked. The sequence of silhouette alterations was scanned for immobility bouts with a threshold algorithm. Threshold was gradually altered and the value which maximized the difference between control and treated groups was chosen. The immobility values obtained with the procedure were compared with the permutation test. The data obtained with this procedure did not differ from those obtained by the rater. Imipramine dose dependently attenuated immobility time in C57BL/6 mice without any effect on BALB/c mice. The new procedure has been implemented in the EthoStudio software. It provides an objective automated evaluation of immobility time in the FST. PMID:20566352

Kulikov, Alexander V; Morozova, Maryana V; Kulikov, Viktor A; Kirichuk, Valeri S; Popova, Nina K

2010-08-15

345

Extraction of Channel Length Independent Series Resistance for Deeply Scaled Metal-Oxide-Semiconductor Field-Effect Transistors  

NASA Astrophysics Data System (ADS)

The recently developed four Rsd extraction methods from a single device, involving the constant-mobility method, the direct Id—Vgs method, the conductance method and the Y-function method, are evaluated on 32 nm n-channel metal-oxide-semiconductor field-effect transistors (nMOSFETs). It is found that Rsd achieved from the constant-mobility method exhibits the channel length independent characteristics. The L-dependent Rsd extracted from the other three methods is proven to be associated with the gate-voltage-induced mobility degradation in the extraction procedures. Based on L-dependent behaviors of Rsd, a new method is proposed for accurate series resistance extraction on deeply scaled MOSFETs.

Ma, Li-Juan; Ji, Xiao-Li; Chen, Yuan-Cong; Xia, Hao-Guang; Zhu, Chen-Xin; Guo, Qiang; Yan, Feng

2014-09-01

346

The effect of series LC circuit parameters on current-ripple reduction in Pulse-link DC-AC converter for fuel cell applications  

Microsoft Academic Search

This paper examines the effect of input current-ripple reduction on Pulse-link DC-AC converter for fuel cells applications. For reducing the input current-ripple, series LC circuit has been connected in parallel at the Pulse-link DC-AC converter. The input current-ripple characteristics have two main domains with combination of series LC parameters. The current-ripple level depends on inductance values. Input current-ripple is reduced

Kentaro Fukushima; Isami Norigoe; Masahito Shoyama; T. Ninomiya; Yosuke Harada; Kenta Tsukakoshi

2009-01-01

347

Parametric effects on glass reaction in the unsaturated test method  

SciTech Connect

The Unsaturated Test Method has been applied to study glass reaction under conditions that may be present at the potential Yucca Mountain site, currently under evaluation for storage of reprocessed high-level nuclear waste. The results from five separate sets of parametric experiments are presented wherein test parameters ranging from water contact volume to sensitization of metal in contact with the glass were examined. The most significant effect was observed when the volume of water, as controlled by the water inject volume and interval period, was such to allow exfoliation of reacted glass to occur. The extent of reaction was also influenced to a lesser extent by the degree of sensitization of the 304L stainless steel. For each experiment, the release of cations from the glass and alteration of the glass were examined. The major alteration product is a smectite clay that forms both from precipitation from solution and from in-situ alteration of the glass itself. It is this clay that undergoes exfoliation as water drips from the glass. A comparison is made between the results of the parametric experiments with those of static leach tests. In the static tests the rates of release become progressively reduced through 39 weeks while, in contrast, they remain relatively constant in the parametric experiments for at least 300 weeks. This differing behavior may be attributable to the dripping water environment where fresh water is periodically added and where evaporation can occur.

Woodland, A.B.; Bates, J.K.; Gerding, T.J.

1991-12-01

348

Lorentz breaking Effective Field Theory and observational tests  

E-print Network

Analogue models of gravity have provided an experimentally realizable test field for our ideas on quantum field theory in curved spacetimes but they have also inspired the investigation of possible departures from exact Lorentz invariance at microscopic scales. In this role they have joined, and sometime anticipated, several quantum gravity models characterized by Lorentz breaking phenomenology. A crucial difference between these speculations and other ones associated to quantum gravity scenarios, is the possibility to carry out observational and experimental tests which have nowadays led to a broad range of constraints on departures from Lorentz invariance. We shall review here the effective field theory approach to Lorentz breaking in the matter sector, present the constraints provided by the available observations and finally discuss the implications of the persisting uncertainty on the composition of the ultra high energy cosmic rays for the constraints on the higher order, analogue gravity inspired, Lorentz violations.

Stefano Liberati

2012-03-19

349

The impact of test case reduction and prioritization on software testing effectiveness  

Microsoft Academic Search

Software testing is critical but most expensive phase of Software Development Life Cycle (SDLC). Development organizations desire to thoroughly test the software. But this exhaustive testing is impractical due to resource constraints. A large number of test suites are generated using automated tools. But the real challenge is the selection of subset of test cases and\\/or high order test cases

S. u. R. Khan; I. u. Rehman; S. U. R. Malik

2009-01-01

350

Ventilation System Effectiveness and Tested Indoor Air Quality Impacts  

SciTech Connect

Ventilation system effectiveness testing was conducted at two unoccupied, single-family, detached lab homes at the University of Texas - Tyler. Five ventilation system tests were conducted with various whole-building ventilation systems. Multizone fan pressurization testing characterized building and zone enclosure leakage. PFT testing showed multizone air change rates and interzonal airflow. Cumulative particle counts for six particle sizes, and formaldehyde and other Top 20 VOC concentrations were measured in multiple zones. The testing showed that single-point exhaust ventilation was inferior as a whole-house ventilation strategy. It was inferior because the source of outside air was not direct from outside, the ventilation air was not distributed, and no provision existed for air filtration. Indoor air recirculation by a central air distribution system can help improve the exhaust ventilation system by way of air mixing and filtration. In contrast, the supply and balanced ventilation systems showed that there is a significant benefit to drawing outside air from a known outside location, and filtering and distributing that air. Compared to the Exhaust systems, the CFIS and ERV systems showed better ventilation air distribution and lower concentrations of particulates, formaldehyde and other VOCs. System improvement percentages were estimated based on four System Factor Categories: Balance, Distribution, Outside Air Source, and Recirculation Filtration. Recommended System Factors could be applied to reduce ventilation fan airflow rates relative to ASHRAE Standard 62.2 to save energy and reduce moisture control risk in humid climates. HVAC energy savings were predicted to be 8-10%, or $50-$75/year.

Rudd, A.; Bergey, D.

2014-02-01

351

Spectral studies on a series of metal ion complexes derived from pyrimidine nucleus, TEM, biological and ?-irradiation effect  

NASA Astrophysics Data System (ADS)

A series of thiouracil complexes was prepared, all the prepared compounds are investigated by all possible tools. The ligand coordinates towards two central atoms as a neutral hexadentate mode. The octahedral structure was proposed with Ni(II), Pt(IV) and UO2(II) complexes. Square-pyramidal and square planar with VO(II) and Pd(II) complexes, respectively. VO(II) complex was irradiated by using Gamma radiation to through a light on the probability of geometry changes with the effect of radiation. The parameters calculated from ESR spectra before and after ?-irradiation reflect the rigidity of the complex towards the effect. Such may discuss the unaffected biological behavior before and after irradiation. XRD patterns were carried out to emphasis on the nature of the particles and the purity of products. The ligand, Pt(IV) and Pd(II) are found in nanometer range. TEM is a sensitive tool used to justify on the microstructure and surface morphology. All the investigated compounds are in nanorange. TG curves reflect a lower thermal stability of all investigated complexes due to the presence of water of crystallization. Finally, a toxic effect was observed with all investigated complexes towards Gram positive bacterium as well as a resistant behavior was observed with Gram negative bacteria.

Al-Ashqer, Sawsan; Abou-Melha, Khlood S.; Al-Hazmi, G. A. A.; Saad, Fawaz A.; El-Metwaly, Nashwa M.

2014-11-01

352

[Effects of false memories on the Concealed Information Test].  

PubMed

The effects of false memories on polygraph examinations with the Concealed Information Test (CIT) were investigated by using the Deese-Roediger-McDermott (DRM) paradigm, which allows participants to evoke false memories. Physiological responses to questions consisting of learned, lure, and unlearned items were measured and recorded. The results indicated that responses to lure questions showed critical responses to questions about learned items. These responses included repression of respiration, an increase in electrodermal activity, and a drop in heart rate. These results suggest that critical response patterns are generated in the peripheral nervous system by true and false memories. PMID:23214081

Zaitsu, Wataru

2012-10-01

353

The effect of benzodiazepine withdrawal on the dexamethasone suppression test.  

PubMed

Recent studies of the dexamethasone suppression test (DST) suggest lack of specificity for the diagnosis of melancholia. An earlier study showed that high doses of benzodiazepines lead to DST normalisation in depressed patients. This present study examines the effect of benzodiazepine withdrawal on the DST in a middle aged, non-depressed group. Forty-eight volunteers from a double blind placebo-controlled trial of triazolam 0.5 mg and lormetazepam 2 mg all suppressed normally when given the DST on the sixth day of withdrawal following 25 days of drug. PMID:3364208

Weppner, G J

1988-02-01

354

In vitro micronucleus test in HepG2 transformants expressing a series of human cytochrome P450 isoforms with chemicals requiring metabolic activation.  

PubMed

It is known that many genotoxic chemicals require oxidative metabolism to elicit genotoxicity. Induced rat liver S9 fraction has been employed as a 'metabolite factory' in in vitro genotoxicity testing. However, the relevance of the induced rat liver S9 fraction has been called into question due to the differences in the rat and human cytochrome P450 (CYP) activities. In the present study, we used a series of ten transformants expressing major human CYP isoforms such as CYP1A1, 1A2, 2A6, 2B6, 2C8, 2C9, 2C19, 2D6, 2E1 and 3A4 in HepG2 cells. To elucidate the usefulness and feasibility of these transformants, genotoxicity was tested without using rat S9. Among these transformants, benzo(a)pyrene-induced or cyclophosphamide-produced micronucleus (MN) frequency was markedly increased in transformants expressing CYP1A2 or CYP2C9, respectively. To explore the possibility that these transformants can be used for screening the possible genotoxicity of newly developed drugs, a chemical which is known to enhance genotoxicity in the presence of external metabolic activation system, okadaic acid (OA), was investigated. OA-induced MN frequency was significantly induced in transformants expressing CYP1A2 compared with the other CYP isoforms. The induced MN frequency was suppressed by treatment with a CYP1A2 specific inhibitor and CYP1A2 to siRNA. In control HepG2 cells harboring an empty vector, OA was treated with microsomes expressing CYP1A2 to induce MN. These results demonstrated that this screening system worked well and OA was found to be metabolically activated by CYP1A2 to induce MN. Based on the results obtained in the present study, this system of transformants is useful to elucidate the genotoxicity involving human CYP metabolism in the process of drug discovery. PMID:19501186

Hashizume, Tsuneo; Yoshitomi, Sumie; Asahi, Satoru; Matsumura, Shigeo; Chatani, Fumio; Oda, Hiroaki

2009-01-01

355

The CLEAN Workshop Series: Promoting Effective Pedagogy for Teaching Undergraduate Climate Science  

NASA Astrophysics Data System (ADS)

To prepare students to understand a changing climate, it is imperative that we equip educators with the best possible tools and methods for reaching their audience. As part of the Climate Literacy and Energy Awareness Network (CLEAN) professional development efforts, two workshops for undergraduate faculty were held in 2012. These workshops used a variety of activities to help faculty learn about recent climate research, take part in demonstrations of successful activities for teaching climate topics, and collaborate to create new teaching materials. The workshops also facilitated professional networking among participants. Both workshops were held online, eliminating the need for travel, encouraging participants without travel funds to attend, and allowing international collaborations and presentations. To create an authentic experience, the workshop used several technologies such as the Blackboard Collaborate web conferencing platform, SERC's web-based collaboration tools and online discussion threads, and conference calls. The workshop Communicating Climate Science in the Classroom, held in April 2012, explored practices for communicating climate science and policy in the classroom and provided strategies to improve student understanding of this complex and sensitive topic. Workshop presentations featured public opinion research on Americans' perceptions of climate change, tactics for identifying and resolving student misconceptions, and methods to address various "backfire effects" that can result from attempts to correct misinformation. Demonstrations of teaching approaches included a role-playing simulation of emissions negotiations, Princeton's climate stabilization wedges game, and an activity that allows students to use scientific principles to tackle misinformation. The workshop Teaching Climate Complexity was held in May 2012. Teaching the complexities of climate science requires an understanding of many facets of the Earth system and a robust pedagogic approach that fosters systems thinking. Workshop participants heard presentations from top climate scientists about topics such as the role of carbon dioxide in regulating Earth's climate, the silicate-weathering thermostat hypothesis, effects of water vapor in the climate system, and albedo effects from the loss of Artic sea ice. Demonstrations of classroom techniques allowed participants to use a jigsaw approach to understand poleward heat transport, plot atmospheric carbon dioxide concentrations, and use a mass balance model to explore the role of carbon dioxide in Earth's atmosphere. A hallmark of the CLEAN workshops is that participants are actively engaged in team projects to create new teaching materials. In the Communicating Climate workshop, John Cook led a demonstration of techniques featured in his Debunking Handbook and workshop participants created examples of how to respond to common climate myths in the classroom. In the Climate Complexities workshop, participants used existing elements within the CLEAN reviewed collection to create a comprehensive sequence of activities that can be used to teach elements of Earth's climate system. Activities from the workshop are archived on the CLEAN website, including screen cast recordings of all the presentations and materials created at each workshop. For more information, visit the workshop website at the URL below.

Kirk, K. B.; Bruckner, M. Z.; Manduca, C. A.; Buhr, S. M.

2012-12-01

356

The hair strand test - a new method for testing antifungal effects of antidandruff preparations.  

PubMed

Seborrheic dermatitis and its minimal variant, dandruff (pityriasis simplex capillitii), are among the most frequent diseases caused by Malassezia (M.) yeasts. Treatment studies have shown that antimycotics achieve clinical improvement, while recolonization leads to recurrent symptoms. Among the antimycotics used are azoles, hydroxypyridones, and various agents such as zinc pyrithione, tar, and selenium disulfide. However, comparative efficacy studies in vitro should not only consider the minimal inhibitory concentrations against Malassezia yeasts but also the bioavailability of the individual substances with regard to hair and scalp. By means of a new method, the hair strand test, hairs from ten volunteers were subjected to standardized 5-min incubation with different shampoo formulations. Thereafter they were rinsed with running water for 1 min and dried. Two hundred each of these hairs (length 1 cm) were given into a medium (olive oil on selective agar for pathogenic fungi) inoculated with M. sympodialis or M. globosa (5 x 10(3) CFU/microl), and the influence on growth was semiquantitatively determined over a period of up to 18 days. According to preliminary results, 1% climbazole proved to be particularly effective. The hair strand test, which can also be performed ex vivo, is a new method to find out whether antimycotic agents bind differently to the hair substance and, via a depot effect, may influence the growth of Malassezia yeasts and thus affect dandruff. This allows conclusions about the efficacy of antidandruff formulations. PMID:12858225

Mayser, Peter; Argembeaux, Horst; Rippke, Frank

2003-01-01

357

State Test Score Trends Through 2007-08, Part 2: Is There a Plateau Effect in Test Scores?  

ERIC Educational Resources Information Center

Many in the research and policy worlds have taken for granted the existence of a phenomenon known as the "plateau effect," wherein test scores rise in the early years of a test-based accountability system and then level off. Drawing from our database of reading and math test results from all 50 states going back as far as 1999, the Center on…

Chudowsky, Naomi; Chudowsky, Victor

2009-01-01

358

SERI Wind Energy Program  

SciTech Connect

The SERI Wind Energy Program manages the areas or innovative research, wind systems analysis, and environmental compatibility for the U.S. Department of Energy. Since 1978, SERI wind program staff have conducted in-house aerodynamic and engineering analyses of novel concepts for wind energy conversion and have managed over 20 subcontracts to determine technical feasibility; the most promising of these concepts is the passive blade cyclic pitch control project. In the area of systems analysis, the SERI program has analyzed the impact of intermittent generation on the reliability of electric utility systems using standard utility planning models. SERI has also conducted methodology assessments. Environmental issues related to television interference and acoustic noise from large wind turbines have been addressed. SERI has identified the causes, effects, and potential control of acoustic noise emissions from large wind turbines.

Noun, R. J.

1983-06-01

359

Effect of uneven sampling on correlation dimension computed from time series data  

E-print Network

Observational data, especially astrophysical data, is often limited by uneven sampling that arises due to lack of observations for a variety of reasons. Such inadvertent gaps are usually smoothed over using interpolation techniques. However the smoothing techniques can introduce artificial effects, especially when non-linear analysis is undertaken. We investigate how uneven sampling can affect the computed values of correlation dimension of the system, without using any interpolation. For this we introduce gaps artificially in synthetic data derived from standard chaotic systems, like the Rossler and Lorenz, with frequency of occurrence and size of missing data drawn from Gaussian distributions. Then we study the changes in correlation dimension with change in the distributions of frequency of gaps introduced and size of data removed. We find that for a considerable range of gap frequency and size, the value of correlation dimension is not significantly affected. This would mean that in such specific cases, the calculated values can still be reliable and acceptable. Thus our study introduces a method of checking the reliability of computed correlation dimension values by calculating the distribution of gaps with respect to its size and frequency and comparing with the standard plots presented in the paper. This is illustrated for real world examples of the data from three variable stars, R Scuti, U Monocerotis and SU Tauri. We also demonstrate how a cubic spline interpolation can cause an unevenly sampled noisy data to be misinterpreted as being chaotic in origin. This is demonstrated for the non chaotic light curve of variable star SS Cygni, which gives a saturated D2 value, when interpolated using a cubic spline.

Sandip V. George; G. Ambika; R. Misra

2014-10-16

360

Thermal Measurements from a Series of Tests with a Large Cylindrical Calorimeter on the Leeward Edge of a JP-8 Pool Fire in Cross-Flow  

Microsoft Academic Search

As part of the full scale fuel fire experimental program, a series of JP-8 pool fire experiments with a large cylindrical calorimeter (3.66 m diameter), representing a C-141 aircraft fuselage, at the lee end of the fuel pool were performed at Naval Air Warfare Center, Weapons Division (NAWCWPNS). The series was designed to support Weapon System Safety Assessment (WSSA) needs

JILL M. SUO-ANTTILA; LOUIS A. GRITZO

2001-01-01

361

Effect of an homologous series of aliphatic alcohols on neuronal and smooth muscle voltage-dependent Ca2+ channels.  

PubMed

The acute inhibitory actions of alcohol on K(+)-stimulated 45Ca2+ uptake into synaptosomes shows regional variation in sensitivity throughout the brain, suggesting the possibility of a selective action on a specific Ca2+ channel subtype. This was examined by comparing the effects of a homologous series of aliphatic alcohols on synaptosomal Ca2+ channels with their actions on K(+)-stimulated Ca2+ channels in guinea-pig intestinal longitudinal muscle, which have been demonstrated to be of the L-type. K(+)-stimulated contraction of and [3H]nitrendipine binding to smooth muscle were both inhibited by the alcohols at similar concentrations, with the potency increasing with chain length. In synaptosomes, however, K(+)-stimulated 45Ca2+ uptake was 5-30 times more sensitive to the inhibitory actions of alcohol than were [3H]nitrendipine and [125I]omega-conotoxin binding. These observations suggest that K(+)-stimulated 45Ca2+ uptake is mediated by a non-L non-N type channel which is more sensitive to the acute effects of alcohols. This is supported by the observation that K(+)-stimulated 45Ca2+ uptake which is insensitive to L- and N-channel antagonists was inhibited by funnel web spider venom. PMID:1337043

Hawthorn, M H; Ferrante, J N; Kwon, Y W; Rutledge, A; Luchowski, E; Bangalore, R; Triggle, D J

1992-12-15

362

Separate effects testing and analyses to investigate liner tearing of the 1:6-scale reinforced concrete containment building  

SciTech Connect

The overpressurization of a 1:6-scale reinforced concrete containment building demonstrated that liner tearing is a plausible failure mode in such structures under severe accident conditions. A combined experimental and analytical program was developed to determine the important parameters which affect liner tearing and to develop reasonably simple analytical methods for predicting when tearing will occur. Three sets of test specimens were designed to allow individual control over and investigation of the mechanisms believed to be important in causing failure of the liner plate. The series of tests investigated the effect on liner tearing produced by the anchorage system, the loading conditions, and the transition in thickness from the liner to the insert plate. Before testing, the specimens were analyzed using two- and three-dimensional finite element models. Based on the analysis, the failure mode and corresponding load conditions were predicted for each specimen. Test data and post-test examination of test specimens show mixed agreement with the analytical predictions with regard to failure mode and specimen response for most tests. Many similarities were also observed between the response of the liner in the 1:6-scale reinforced concrete containment model and the response of the test specimens. This work illustrates the fact that the failure mechanism of a reinforced concrete containment building can be greatly influenced by details of liner and anchorage system design. Further, it significantly increases the understanding of containment building response under severe conditions.

Spletzer, B.L.; Lambert, L.D.; Bergman, V.L. [Sandia National Labs., Albuquerque, NM (United States)] [and others

1995-06-01

363

Evaluation of Margaria staircase test: the effect of body size.  

PubMed

The purpose of this study was to evaluate the methodology of Margaria staircase test (MT) for assessment of muscle anaerobic power. Specifically, we hypothesized that due to the scaling effects the outcome of MT calculated using the standard formula that suggests the power output to be proportional to body mass [P = (m . g . h)/T; P = power output, m = body mass, g = 9.81 m/s(2), h = height of stairs climbed, T = running time] overestimates the effect of body size on the calculated muscle power output. Young and physically active subjects (N = 111) were tested and the relationship between P and body size (S; either body mass or height) was assessed by standard allometric model (i.e., P = a . S ( b ); where a and b were the constant multiplier and allometric parameter, respectively). The results supported the hypothesized relationship by revealing b = 0.66 (95%CI = 0.49-0.83; r = 0.59; P < 0.001) and b = 1.13 (95%CI = 0.49-0.83; r = 0.34; P < 0.001) for body mass and body height, respectively. The obtained values of b (i.e., b < 1 for body mass and b < 3 for body height) suggest that the standard formula of MT overestimates the power output of larger subjects and underestimates the power of smaller ones. Since the results were mainly in line with both the experimental findings and theoretical predictions regarding the general effects of scale on human muscle power, we propose a modified formula that provides normalized power: P ( n ) = P/m (0.67) = [(m . g . h)/T]/m (0.67) = (m (0.33) . g . h)/T. The modified formula could provide a body size independent index of muscle power that would both allow for establishing standards and enable comparison of individuals and groups of individuals of different body dimensions. PMID:17273883

Nedeljkovic, Aleksandar; Mirkov, Dragan M; Pazin, Nemanja; Jaric, Slobodan

2007-05-01

364

Linking manipulative experiments to field data to test the dilution effect.  

PubMed

The dilution effect, the hypothesis that biodiversity reduces disease risk, has received support in many systems. However, few dilution effect studies have linked mechanistic experiments to field patterns to establish both causality and ecological relevance. We conducted a series of laboratory experiments and tested the dilution effect hypothesis in an amphibian-Batrachochytrium dendrobatidis (Bd) system and tested for consistency between our laboratory experiments and field patterns of amphibian species richness, host identity and Bd prevalence. In our laboratory experiments, we show that tadpoles can filter feed Bd zoospores and that the degree of suspension feeding was positively associated with their dilution potential. The obligate suspension feeder, Gastrophryne carolinensis, generally diluted the risk of chytridiomycosis for tadpoles of Bufo terrestris and Hyla cinerea, whereas tadpoles of B. terrestris (an obligate benthos feeder) generally amplified infections for the other species. In addition, G. carolinensis reduced Bd abundance on H. cinerea more so in the presence than absence of B. terrestris and B. terrestris amplified Bd abundance on H. cinerea more so in the absence than presence of G. carolinensis. Also, when ignoring species identity, species richness was a significant negative predictor of Bd abundance. In our analysis of field data, the presence of Bufo spp. and Gastrophryne spp. were significant positive and negative predictors of Bd prevalence, respectively, even after controlling for climate, vegetation, anthropogenic factors (human footprint), species richness and sampling effort. These patterns of dilution and amplification supported our laboratory findings, demonstrating that the results are likely ecologically relevant. The results from our laboratory and field data support the dilution effect hypothesis and also suggest that dilution and amplification are predictable based on host traits. Our study is among the first to link manipulative experiments, in which a potential dilution mechanism is supported, with analyses of field data on species richness, host identity, spatial autocorrelation and disease prevalence. PMID:24289288

Venesky, Matthew D; Liu, Xuan; Sauer, Erin L; Rohr, Jason R

2013-10-01

365

Homogenising time series: Beliefs, dogmas and facts  

NASA Astrophysics Data System (ADS)

For obtaining reliable information about climate change and climate variability the use of high quality data series is essentially important, and one basic tool of quality improvements is the statistical homogenisation of observed time series. In the recent decades large number of homogenisation methods has been developed, but the real effects of their application on time series are still not known entirely. The ongoing COST HOME project (COST ES0601) is devoted to reveal the real impacts of homogenisation methods more detailed and with higher confidence than earlier. As part of the COST activity, a benchmark dataset was built whose characteristics approach well the characteristics of real networks of observed time series. This dataset offers much better opportunity than ever to test the wide variety of homogenisation methods, and analyse the real effects of selected theoretical recommendations. The author believes that several old theoretical rules have to be re-evaluated. Some examples of the hot questions, a) Statistically detected change-points can be accepted only with the confirmation of metadata information? b) Do semi-hierarchic algorithms for detecting multiple change-points in time series function effectively in practise? c) Is it good to limit the spatial comparison of candidate series with up to five other series in the neighbourhood? Empirical results - those from the COST benchmark, and other experiments too - show that real observed time series usually include several inhomogeneities of different sizes. Small inhomogeneities seem like part of the climatic variability, thus the pure application of classic theory that change-points of observed time series can be found and corrected one-by-one is impossible. However, after homogenisation the linear trends, seasonal changes and long-term fluctuations of time series are usually much closer to the reality, than in raw time series. The developers and users of homogenisation methods have to bear in mind that the eventual purpose of homogenisation is not to find change-points, but to have the observed time series with statistical properties those characterise well the climate change and climate variability.

Domonkos, P.

2010-09-01

366

Wing vortex refraction effects from BAC 1-11 flight tests  

NASA Astrophysics Data System (ADS)

A series of noise measurements made in 1976 using a BAC 1-11 aircraft are analyzed in order to elucidate the sideline noise characteristics of aircraft with rear-fuselage engine installations. In these tests, aimed at measuring the effects of wing vortices on the engine noise radiation, the aircraft was flown in a large flat circular arc at 0.25 M and at a bank angle of 20 deg, crossing a radial microphone array at a height of 500 ft. The frequency range of the acceptable data falls into three octaves with center frequencies of 500 Hz, 1 kHz, and 2 kHz, and the variation of the aircraft octave sound pressure levels as a function of the azimuth angle are presented. There are marked dips in the noise levels, peaking at 6.5 dB, at angles near the wing plane, and there is little dependence on frequency over the range studied. Noise reductions are evident to about 20 deg below the wing plane. It is suggested that the observed radiation patterns arise primarily from wing vortex refraction effects, although jet-by-jet shielding effects are a contributor.

Bryce, W. D.

367

River flood events as natural tracer tests for investigating a coupled river-aquifer system: improved time-lapse 3D imaging of flow patterns by deconvolving ERT time-series  

NASA Astrophysics Data System (ADS)

We are investigating how temporal fluctuations in 3D apparent resistivity data can be used to image freshly infiltrated river water in an aquifer. To this end, we have installed 18 wells within a gravel aquifer in the vicinity of the losing river Thur in Switzerland. A sequence of ˜15,000 crosswell apparent resistivity measurements is acquired every 7 h. A neighboring river gauge and 14 loggers also record water table, temperature, and electrical resistivity of water. Following precipitation events, the river stage increases quickly (e.g., 2 m in 6 h) and the salinity of the river water decreases (e.g., 30%). The changing electrical characteristics of the infiltrating water can thus be used as a natural conservative tracer that we can track in space and time in the aquifer. The time-lapse ERT data are sensitive to variations in salinity and watertable height, with the relative contributions of these two opposing effects depending on time and electrode configuration. Initial time-lapse inversions of the raw data display strong artifacts related to the watertable fluctuations. Here, we focus on correcting the apparent resistivity data to avoid these effects. We assume that variations in the apparent resistivity for each electrode configuration can be predicted at all times through a convolution of unknown smoothly varying finite linear impulse responses (to be determined) with variations in the river stage and the electrical resistivity of the river water. Prior to deconvolution, the apparent resistivities of each time-lapse sequence are resampled to a common time. We also filter out the effects of long-term variations in temperature on the apparent resistivities. The transfer functions estimated through deconvolution allow us to estimate accurately the variations in the apparent resistivity data (the mean correlation coefficient cc is 0.92). The ERT data filtered for the watertable effect have an increased correlation with the time-series of the groundwater electrical resistivity (cc from 0.75 to 0.81) and are practically uncorrelated with those of the watertable (cc = -0.16). To test the generality of the estimated transfer functions, we use input signals outside the calibration period to predict the apparent resistivity time-series with overall satisfactory results. From data recorded within the calibration period, we extract time-series corresponding to a specific flooding event and perform time-lapse inversion of the filtered data. Time-series of the inverted electrical resistivity at different locations within the aquifer display reduced correlation with water table fluctuations (cc from -0.77 to -0.49 similar to the correlation of the input signals) and much higher correlation with the groundwater resistivity data (cc from 0.77 to 0.86). The time-lapse inversions reveal that a central 2-m-thick high resistivity part of the aquifer displays the largest resistivity time variations. We observe resistivity increases up to 10%, with the arrival peak moving at approximately 10 m/day.

Coscia, I.; Linde, N.; Greenhalgh, S. A.; Vogt, T.; Doetsch, J. A.; Green, A. G.

2010-12-01

368

Entwicklung diagnostischer Rechtschreibtests in ladinischer und surselvischer Sprache (Serie TOR). Forschungsbericht Nr. 5 (The Development of Diagnostic Spelling Tests in Ladin and Surselvan [TOR Series]. Research Bulletin No. 5).  

ERIC Educational Resources Information Center

To meet the instructional needs of the hundreds of children who speak the Ladin and Surselvan Raeto-Romance dialects of Switzerland, spelling categories pertinent to the two dialects were established based on the spelling test concept of Rudolf Mueller. Following classic test analysis procedures, three diagnostic dictation tests (one in Ladin, two…

Flammer, August; And Others

369

Hierarchical structure of the energy landscape of proteins revisited by time series analysis. II. Investigation of explicit solvent effects  

NASA Astrophysics Data System (ADS)

Time series analysis tools are employed on the principal modes obtained from the C? trajectories from two independent molecular-dynamics simulations of ?-amylase inhibitor (tendamistat). Fluctuations inside an energy minimum (intraminimum motions), transitions between minima (interminimum motions), and relaxations in different hierarchical energy levels are investigated and compared with those encountered in vacuum by using different sampling window sizes and intervals. The low-frequency low-indexed mode relationship, established in vacuum, is also encountered in water, which shows the reliability of the important dynamics information offered by principal components analysis in water. It has been shown that examining a short data collection period (100ps) may result in a high population of overdamped modes, while some of the low-frequency oscillations (<10cm-1) can be captured in water by using a longer data collection period (1200ps). Simultaneous analysis of short and long sampling window sizes gives the following picture of the effect of water on protein dynamics. Water makes the protein lose its memory: future conformations are less dependent on previous conformations due to the lowering of energy barriers in hierarchical levels of the energy landscape. In short-time dynamics (<10ps), damping factors extracted from time series model parameters are lowered. For tendamistat, the friction coefficient in the Langevin equation is found to be around 40-60cm-1 for the low-indexed modes, compatible with literature. The fact that water has increased the friction and that on the other hand has lubrication effect at first sight contradicts. However, this comes about because water enhances the transitions between minima and forces the protein to reduce its already inherent inability to maintain oscillations observed in vacuum. Some of the frequencies lower than 10cm-1 are found to be overdamped, while those higher than 20cm-1 are slightly increased. As for the long-time dynamics in water, it is found that random-walk motion is maintained for approximately 200ps (about five times of that in vacuum) in the low-indexed modes, showing the lowering of energy barriers between the higher-level minima.

Alakent, Burak; Camurdan, Mehmet C.; Doruker, Pemra

2005-10-01

370

Neurobehavioral Effects of Space Radiation on Psychomotor Vigilance Tests  

NASA Astrophysics Data System (ADS)

Neurobehavioral Effects of Space Radiation on Psychomotor Vigilance Tests INTRODUCTION Risk assessment of the biological consequences of living in the space radiation environment represents one of the highest priority areas of NASA radiation research. Of critical importance is the need for a risk assessment of damage to the central nervous system (CNS) leading to functional cognitive/behavioral changes during long-term space missions, and the development of effective shielding or biological countermeasures to such risks. The present research focuses on the use of an animal model that employs neurobehavioral tests identical or homologous to those currently in use in human models of risk assessment by U.S. agencies such as the Depart-ment of Defense and Federal Aviation and Federal Railroad Administrations for monitoring performance and estimating accident risks associated with such variables as fatigue and/or alcohol or drug abuse. As a first approximation for establishing human risk assessments due to exposure to space radiation, the present work provides animal performance data obtained with the rPVT (rat Psychomotor Vigilance Test), an animal analog of the human PVT that is currently employed for human risk assessments via quantification of sustained attention (e.g., 'vigilance' or 'readiness to perform' tasks). Ground-based studies indicate that radiation can induce neurobehavioral changes in rodents, including impaired performance on motor tasks and deficits in spatial learning and memory. The present study is testing the hypothesis that radiation exposure impairs motor function, performance accuracy, vigilance, motivation, and memory in adult male rats. METHODS The psychomotor vigilance test (PVT) was originally developed as a human cognitive neurobe-havioral assay for tracking the temporally dynamic changes in sustained attention, and has also been used to track changes in circadian rhythm. In humans the test requires responding to a small, bright-red-light stimulus (LED-digital counter) as soon as the stimulus appears, which stops the stimulus counter and displays the reaction time for each trial in milliseconds for a 1-sec period. Simple to perform, the PVT has only very minor learning effects, is widely used in human risk assessments in operational environments, and has been recently developed and adopted for use on the ISS for astronauts as a "self test" to provide performance feedback, detect changes in alertness, prevent errors, and manage fatigue from sleep loss, circadian dis-ruption, and high workload requirements. A rodent version of the PVT, the rPVT, has been developed and demonstrated to track the same types of performance variables as the human PVT -i.e., general motor function and speed, fine motor control, inhibitory control ("impul-sivity"), timing, selective attention, motivation, and basic sensory function. Five cohorts of 16 rats each (total N = 80) were trained on the rPVT, exported to BNL for head-only radiation exposure (0, 25, 50, 100, and 200 cGy protons @ 150 MeV/n), then returned to Johns Hopkins for follow-up testing. RESULTS The rPVT was readily learned by all rats and required as little as 5-7 days of training to acquire baseline performance levels. Following irradiation, performances in the rPVT were disrupted at exposure levels of 50, 100, and 200 cGy, showing a consistent, significant increase (i.e., slowing) in reaction times and increased lapses in responding, both indicative of a decrease in sustained attention. Additionally, premature responses showed consistent increases at the higher radiation levels. None of these changes were observed in the non-exposed control animals. Over this same time period, no significant changes were observed in discrimination accuracy, motivation (as indicated by trials completed), or food intake. SUMMARY AND CONCLUSIONS The results of these experiments demonstrate the sensitivity of tests such as the rPVT for assessing the effects of head-only space radiation on cognitive neurobehavioral function. Expo-sure to protons at as litt

Hienz, Robert; Davis, Catherine; Weed, Michael; Guida, Peter; Gooden, Virginia; Brady, Joseph; Roma, Peter

371

Dynamic ground effects flight test of an F-15 aircraft  

NASA Technical Reports Server (NTRS)

Flight tests to determine the changes in the aerodynamic characteristics of an F-15 aircraft caused by dynamic ground effects are described. Data were obtained for low and high sink rates between 0.7 and 6.5 ft/sec and at two landing approach speeds and flap settings: 150 kn with the flaps down and 170 kn with the flaps up. Simple correlation curves are given for the change in aerodynamic coefficients because of ground effects as a function of sink rate. Ground effects generally caused an increase in the lift, drag, and nose-down pitching movement coefficients. The change in the lift coefficient increased from approximately 0.05 at the high-sink rate to approximately 0.10 at the low-sink rate. The change in the drag coefficient increased from approximately 0 to 0.03 over this decreasing sink rate range. No significant difference because of the approach configuration was evident for lift and drag; however, a significant difference in pitching movement was observed for the two approach speeds and flap settings. For the 170 kn with the flaps up configuration, the change in the nose-down pitching movement increased from approximately -0.008 to -0.016. For the 150 kn with the flaps down configuration, the change was approximately -0.008 to -0.038.

Corda, Stephen; Stephenson, Mark T.; Burcham, Frank W.; Curry, Robert E.

1994-01-01

372

Relative Effects of English Proficiency on General Admissions Tests versus Subject Tests.  

ERIC Educational Resources Information Center

Examined the degree to which test scores reflect English proficiency using data on students whose native language was Spanish. They had taken the GRE, English proficiency tests, and the PAEG, a test in Spanish used for admission to graduate schools in Puerto Rico. Found that quantitative, analytical, and subject tests are more highly related to…

Pennock-Roman, Maria

2002-01-01

373

Nonparametric tests of treatment effect based on combined endpoints for mortality and recurrent events.  

PubMed

Terminal events are commonly combined with other outcomes to improve the power for detecting treatment effects in clinical studies. This manuscript explores novel ways to combine information on terminal and recurrent events in constructing two-sample tests. Existing approaches follow either a time-to-first event analysis approach or a recurrent event modeling approach. Nonparametric recurrent event analyses are often restricted by independence assumptions on gap times between events. Although time-to-first event analyses are not subject to this restriction, they discard information that occurs beyond the initial event and are much less powerful for detecting treatment differences. We develop two new approaches for determining treatment effects, motivated by less restrictive assumptions of time-to-first event analyses that combine information from multiple follow-up intervals. The first testing procedure pools (correlated) short-term [Formula: see text]-restricted outcomes from prespecified intervals starting at times [Formula: see text], and compares estimated [Formula: see text]-restricted mean survival across treatment groups from this combined dataset. The second procedure calculates conditional [Formula: see text]-restricted means from those at risk at times [Formula: see text] and compares the area under a function of these by treatment. Variances calculations, taking into account correlation of short-term outcomes within individuals, linearize random components of the test statistics following Woodruff (1971. A simple method for approximating the variance of a complicated estimate. Journal of the American Statistical Association 66: , 411-414) and more recently Williams (1995. Product-limit survival functions with correlated survival times. Lifetime Data Analysis 1: , 171-186). Simulations compare the finite sample performance of our tests to the robust proportional rates model proposed by Lin and others (2000. Semiparametric regression for the mean and rate functions of recurrent events. Journal of the Royal Statistical Society: Series B (Statistical Methodology) 62: (4), 711-730) and the Ghosh and Lin (2000. Non-parametric analysis of recurrent events and death. Biometrics 56: (2), 554-562) combined test for recurrent events and death. For different treatment effect patterns the proposed methods perform favorably when compared with existing methods. These new analysis approaches also produce correct type I error rates with correlated gap times between events. New methods are applied to data from a trial of azithromycin in patients with chronic obstructive pulmonary disease. PMID:24719282

Tayob, Nabihah; Murray, Susan

2015-01-01

374

Test of fundamental symmetries via the Primakoff effect  

SciTech Connect

The three neutral pseudoscalar mesons, pi^0, eta and eta', represent one of the most interesting systems in strong interaction physics. A study of the electromagnetic properties of these mesons provides a sensitive probe of the symmetry structure of QCD at low energy. A comprehensive experimental program at Jefferson Laboratory (Jlab) is aimed at gathering high precision measurements on the two-photon decay widths and transition form factors at low Q^2 of pi^0, eta and eta' via the Primakoff effect. The completed experiments on the pi^0 radiative decay width at Jlab 6 GeV, and other planned measurements at Jlab 12?GeV will provide a rich laboratory to test the chiral anomaly and to study the origin and dynamics of chiral symmetry breaking at the confinement scale of QCD.

Gan, Liping [University of North Carolina at Wilmington

2014-06-01

375

Series Fiction.  

ERIC Educational Resources Information Center

Explains how an experienced teacher is trying to incorporate Houghton Mifflin's new reading series, "Invitations to Literacy", into her elementary school classes. Discusses reasons for a standardized reading program, including high student mobility, younger less-experienced teachers, and a lack of accountability; and considers whole language…

Ramsay, John G.

1999-01-01

376

Series Resistors  

NSDL National Science Digital Library

Students can easily see what series resistance means in this activity. Students are sometimes confused by the fact that all real resistors are the same size even when they have far different values. It is recommended that after this lab at home, students

Michael Horton

2009-05-30

377

Assiniboine Series.  

ERIC Educational Resources Information Center

This series of illustrated booklets presents 13 Indian stories in a bilingual format of English and Assiniboine, an Indian tribal language. Written on the first grade level, the stories have the following titles: (1) "Orange Tree in Lodgepole"; (2) "Pretty Flower"; (3) Inktomi and the Rock"; (4) "Inktomi and the Ducks"; (5) "Inktomi and the…

Allen, Minerva

378

Fabric Test  

NSDL National Science Digital Library

In this classroom activity, students work in groups to test a variety of fabrics to determine each one's effectiveness as an insulator. The printable five-page handout includes a series of inquiry-based questions to get students thinking about the conditions in Antarctica and the properties of specialty fabrics, illustrated activity directions and a worksheet that includes areas for recording their experiment data, and questions that prompt students to compare their results against their original hypotheses.

379

Shielding effectiveness testing method of pulse electric field based on GTEM cell  

NASA Astrophysics Data System (ADS)

In order to evaluate the shielding ability of materials under the radiation of electromagnetic pulse (EMP), a test method based on GTEM cell is put forward. And the test theory and the components of test system are introduced. The shielding box method is verified to be reasonable with simulation. The shielding effectiveness (SE) of one material is tested with this method, and the test results are compared with the results based on the coaxial method. The results show this test method can be used to test the effect of SE on EMP, and the test results can reflect the true shielding ability of the test material.

Zhang, Long; Wei, Guanghui; Hu, Xiaofeng; Li, Xinfeng

2013-03-01

380

Effect of Locomotor Training on Motor Recovery and Walking Ability in Patients with Incomplete Spinal Cord Injury: A Case Series  

PubMed Central

[Purpose] The aim of this study was to describe the effect of locomotor training on a treadmill for three individuals who have an incomplete spinal cord injury (SCI). [Subjects and Methods] Three indivduals (2 males, 1 female) with incomplete paraplegia participated in this prospective case series. All subjects participated in locomotor training for a maximum of 20 minutes on a motorized treadmill without elevation at a comfortable walking speed three days a week for four weeks as an adjunct to a conventional physiotherapy program. The lower extremity strength and walking capabilities were used as the outcome measures of this study. Lower extremity strength was measured by lower extremity motor score (LEMS). Walking capability was assessed using the Walking Index for Spinal Cord Injury (WISCI II). [Results] An increase in lower extremity motor score and walking capabilities at the end of training program was found. [Conclusion] Gait training on a treadmill can enhance motor recovery and walking capabilities in subjects with incomplete SCI. Further research is needed to generalize these findings and to identify which patients might benefit from locomotor training. PMID:25013303

Anwer, Shahnawaz; Equebal, Ameed; Palekar, Tushar J; Nezamuddin, M; Neyaz, Osama; Alghadir, Ahmad

2014-01-01

381

49 CFR 40.207 - What is the effect of a cancelled drug test?  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false What is the effect of a cancelled drug test? 40.207 Section 40.207...ALCOHOL TESTING PROGRAMS Problems in Drug Tests § 40.207 What is the effect of a cancelled drug test? (a) A cancelled drug...

2010-10-01

382

49 CFR 40.207 - What is the effect of a cancelled drug test?  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false What is the effect of a cancelled drug test? 40.207 Section 40.207...ALCOHOL TESTING PROGRAMS Problems in Drug Tests § 40.207 What is the effect of a cancelled drug test? (a) A cancelled drug...

2013-10-01

383

49 CFR 40.207 - What is the effect of a cancelled drug test?  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false What is the effect of a cancelled drug test? 40.207 Section 40.207...ALCOHOL TESTING PROGRAMS Problems in Drug Tests § 40.207 What is the effect of a cancelled drug test? (a) A cancelled drug...

2012-10-01

384

49 CFR 40.207 - What is the effect of a cancelled drug test?  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false What is the effect of a cancelled drug test? 40.207 Section 40.207...ALCOHOL TESTING PROGRAMS Problems in Drug Tests § 40.207 What is the effect of a cancelled drug test? (a) A cancelled drug...

2011-10-01

385

Test-Enhanced Learning of Natural Concepts: Effects on Recognition Memory, Classification, and Metacognition  

ERIC Educational Resources Information Center

Three experiments examined testing effects on learning of natural concepts and metacognitive assessments of such learning. Results revealed that testing enhanced recognition memory and classification accuracy for studied and novel exemplars of bird families on immediate and delayed tests. These effects depended on the balance of study and test

Jacoby, Larry L.; Wahlheim, Christopher N.; Coane, Jennifer H.

2010-01-01

386

Assessing the psychological effects of prenatal screening tests for maternal and foetal conditions: a systematic review  

Microsoft Academic Search

Background: Foetal medicine advancements have increased the variety of prenatal screening tests that can be offered to women. Prenatal screening tests may have positive or negative effects for women. This systematic review aims to review the published literature to determine the psychological effects of prenatal screening tests for conditions that affect the mother, as compared to screening tests for conditions

James Matthew Harris; Linda Franck; Susan Michie

2012-01-01

387

49 CFR 40.273 - What is the effect of a cancelled alcohol test?  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false What is the effect of a cancelled alcohol test? 40.273 Section 40...ALCOHOL TESTING PROGRAMS Problems in Alcohol Testing § 40.273 What is the effect of a cancelled alcohol test? (a) A cancelled...

2011-10-01

388

40 CFR 53.56 - Test for effect of variations in ambient pressure.  

Code of Federal Regulations, 2013 CFR

...Test for effect of variations in ambient pressure. 53.56 Section 53.56 Protection...Test for effect of variations in ambient pressure. (a) Overview. (1) This test...variations in ambient (barometric) pressure. Tests shall be conducted in a...

2013-07-01

389

40 CFR 53.56 - Test for effect of variations in ambient pressure.  

...Test for effect of variations in ambient pressure. 53.56 Section 53.56 Protection...Test for effect of variations in ambient pressure. (a) Overview. (1) This test...variations in ambient (barometric) pressure. Tests shall be conducted in a...

2014-07-01

390

On Testing Effectiveness of Metamorphic Relations: A Case Study  

Microsoft Academic Search

One fundamental challenge for software testing is the oracle problem, which means that either there does not exist a mechanism (called oracle) to verify the test output given any possible program input, or it is very expensive, if not impossible, to apply the oracle. Metamorphic testing is an innovative approach to oracle problem. In metamorphic testing, metamorphic relations are derived

Mahmuda Asrafi; Huai Liu; Fei-Ching Kuo

2011-01-01

391

Effect of alignment changes on socket reaction moments during gait in transfemoral and knee-disarticulation prostheses: Case series  

PubMed Central

The alignment of a lower-limb prosthesis is critical to the successful prosthetic fitting and utilization by the wearer. Loads generated by the socket applied to the residual limb while walking are thought to be different in transfemoral and knee-disarticulation prostheses. The aim of this case series was to compare the socket reaction moments between transfemoral and knee-disarticulation prostheses and to investigate the effect of alignment changes on them. Two amputees, one with a transfemoral prosthesis and another with a knee-disarticulation prosthesis, participated in this study. A Smart Pyramid™ was used to measure socket reaction moments while walking under 9 selected alignment conditions; including nominally aligned, angle malalignments of 6° (flexion, extension, abduction and adduction) and translation malalignments of 15 mm (anterior, posterior, medial and lateral) of the socket relative to the foot. This study found that the pattern of the socket reaction moments was similar between transfemoral and knee-disarticulation prostheses. An extension moment in the sagittal plane and a varus moment in the coronal plane were dominant during stance under the nominally aligned condition. This study also demonstrated that alignment changes might have consistent effects on the socket reaction moments in transfemoral or knee-disarticulation prostheses. Extension or posterior translation of the socket resulted in increases in an extension moment, while abduction or lateral translation of the socket resulted in increases in a varus moment. The socket reaction moments may potentially serve as useful biomechanical parameters to evaluate alignment in transfemoral or knee-disarticulation prostheses. PMID:23931961

Kobayashi, Toshiki; Orendurff, Michael S.; Boone, David A.

2013-01-01

392

Effects of D-series resolvins on behavioral and neurochemical changes in a fibromyalgia-like model in mice.  

PubMed

This study investigated whether the spinal or systemic treatment with the lipid resolution mediators resolvin D1 (RvD1), aspirin-triggered resolvin D1 (AT-RvD1) and resolvin D2 (RvD2) might interfere with behavioral and neurochemical changes in the mouse fibromyalgia-like model induced by reserpine. Acute administration of AT-RvD1 and RvD2 produced a significant inhibition of mechanical allodynia and thermal sensitization in reserpine-treated mice, whereas RvD1 was devoid of effects. A similar antinociceptive effect was obtained by acutely treating animals with the reference drug pregabalin. Noteworthy, the repeated administration of AT-RvD1 and RvD2 also prevented the depressive-like behavior in reserpine-treated animals, according to assessment of immobility time, although the chronic administration of pregabalin failed to affect this parameter. The induction of fibromyalgia by reserpine triggered a marked decrease of dopamine and serotonin (5-HT) levels, as examined in total brain, spinal cord, cortex and thalamus. Reserpine also elicited a reduction of glutamate levels in total brain, and a significant increase in the spinal cord and thalamus. Chronic treatment with RvD2 prevented 5-HT reduction in total brain, and reversed the glutamate increases in total brain and spinal cord. Otherwise, AT-RvD1 led to a recovery of dopamine levels in cortex, and 5-HT in thalamus, whilst it diminished brain glutamate contents. Concerning pregabalin, this drug prevented dopamine reduction in total brain, and inhibited glutamate increase in brain and spinal cord of reserpine-treated animals. Our data provide novel evidence, showing the ability of D-series resolvins AT-RvD1, and mainly RvD2, in reducing painful and depressive symptoms allied to fibromyalgia in mice. PMID:24929111

Klein, Caroline P; Sperotto, Nathalia D M; Maciel, Izaque S; Leite, Carlos E; Souza, Alessandra H; Campos, Maria M

2014-11-01

393

Testing polynomial covariate effects in linear and generalized linear mixed models*  

PubMed Central

An important feature of linear mixed models and generalized linear mixed models is that the conditional mean of the response given the random effects, after transformed by a link function, is linearly related to the fixed covariate effects and random effects. Therefore, it is of practical importance to test the adequacy of this assumption, particularly the assumption of linear covariate effects. In this paper, we review procedures that can be used for testing polynomial covariate effects in these popular models. Specifically, four types of hypothesis testing approaches are reviewed, i.e. R tests, likelihood ratio tests, score tests and residual-based tests. Derivation and performance of each testing procedure will be discussed, including a small simulation study for comparing the likelihood ratio tests with the score tests. PMID:19816591

Huang, Mingyan; Zhang, Daowen

2009-01-01

394

The Effects of the "Language Arts" Strand of the "Reading Mastery Signature Series" on the Reading and Language Skills of English Language Learners  

ERIC Educational Resources Information Center

Building on research showing the interdependence of language skills and reading proficiency, this study examined the effects of using the "Language Arts" strand of the "Reading Mastery Signature" 2008 series program as a supplement to non-Direct Instruction reading programs with English Language Learner (ELL) students. Seventy-six kindergarten…

Ralston, Nicole C.; Benner, Gregory J.; Nelson, J. Ron; Caniglia, Cyndi

2009-01-01

395

Differentiation of Period, Age, and Cohort Effects on Drug Use 1976-1986. Monitoring the Future Occasional Paper Series, Paper 22.  

ERIC Educational Resources Information Center

Conducted as part of the Monitoring the Future project, this study used a cohort-sequential design to examine period, age, and cohort effects on substance use among American youth between the ages of 18 and 28 from the high school classes of 1976 to 1986. This manuscript supersedes Paper 14 in the series which reported on American youth from 18-24…

O'Malley, Patrick M.; And Others

396

The Effect of Mode of Response on a Semidirect Test of Oral Proficiency  

ERIC Educational Resources Information Center

This article reports on a study conducted with 42 participants from a Chilean university, which aimed to determine the effect of mode of response on test performance and test-taker perception of test features by comparing a semidirect online version and a direct face-to-face version of a speaking test. Candidate performances on both test versions…

Kiddle, Thom; Kormos, Judit

2011-01-01

397

The Effects of Accommodations on Adolescents' Self-Efficacy and Test Performance  

ERIC Educational Resources Information Center

This study examined the effects of testing accommodations on eighth-grade students' performance on large-scale achievement tests and also on their attitudes and reactions to the tests. Findings revealed significant differences in the ways students with and without disabilities experienced testing and how testing accommodations affected students'…

Feldman, Elizabeth; Kim, Jee-Seon; Elliott, Stephen N.

2011-01-01

398

30 CFR 35.22 - Test to determine effect of evaporation on flammability.  

Code of Federal Regulations, 2010 CFR

... false Test to determine effect of evaporation on flammability. 35.22 Section...35.22 Test to determine effect of evaporation on flammability. (a) Purpose...test shall be to determine the effect of evaporation on the reduction of fire...

2010-07-01

399

30 CFR 35.22 - Test to determine effect of evaporation on flammability.  

Code of Federal Regulations, 2013 CFR

... false Test to determine effect of evaporation on flammability. 35.22 Section...35.22 Test to determine effect of evaporation on flammability. (a) Purpose...test shall be to determine the effect of evaporation on the reduction of fire...

2013-07-01

400

30 CFR 35.22 - Test to determine effect of evaporation on flammability.  

... false Test to determine effect of evaporation on flammability. 35.22 Section...35.22 Test to determine effect of evaporation on flammability. (a) Purpose...test shall be to determine the effect of evaporation on the reduction of fire...

2014-07-01

401

30 CFR 35.22 - Test to determine effect of evaporation on flammability.  

Code of Federal Regulations, 2011 CFR

... false Test to determine effect of evaporation on flammability. 35.22 Section...35.22 Test to determine effect of evaporation on flammability. (a) Purpose...test shall be to determine the effect of evaporation on the reduction of fire...

2011-07-01

402

30 CFR 35.22 - Test to determine effect of evaporation on flammability.  

Code of Federal Regulations, 2012 CFR

... false Test to determine effect of evaporation on flammability. 35.22 Section...35.22 Test to determine effect of evaporation on flammability. (a) Purpose...test shall be to determine the effect of evaporation on the reduction of fire...

2012-07-01

403

The effectiveness of test-enhanced learning depends on trait test anxiety and working-memory capacity.  

PubMed

Despite being viewed as a better way to enhance learning than repeated study, it has not been clear whether repeated testing is equally effective for students with a wide range of cognitive abilities. The current study examined whether test-enhanced learning would be equally beneficial to participants with varied working-memory capacity (WMC) and trait test anxiety (TA). Chinese-English bilingual undergraduates in Hong Kong were recruited as participants. They acquired Swahili-English word pairs (half via repeated study and half via repeated testing) and performed a delayed cued-recall test for all pairs about one week after the acquisition phase. Their WMC and TA were estimated by Unsworth, Heitz, Schrock, and Engle's (2005) operation-span task and the Chinese version of Spielberger's (1980) Test Anxiety Inventory, respectively. We replicated the typical testing effect: Participants performed better for pairs in the repeated-testing condition than those in the repeated-study condition. Regression analyses showed that, (a) relative to other participants, those with lower WMC and higher TA made more intralist intrusion errors (i.e., recalling a wrong English translation to a Swahili word cue) during the acquisition phase, and (b) the testing effect was negatively correlated with TA for participants with lower WMC, but was not correlated with TA for participants with higher WMC. This demonstrates a boundary condition for the use of test-enhanced learning. Implications of these findings for theories of the testing effect (e.g., Pyc & Rawson's, 2010, mediator-effectiveness hypothesis) and their application in classroom settings are discussed. PMID:22774786

Tse, Chi-Shing; Pu, Xiaoping

2012-09-01

404

PWR blowdown heat transfer separate-effects program. Thermal-hydraulic test facility experimental data report for test 169. [PWR  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 169, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 169 was conducted to determine

V. D. Clemons; R. A. Hedrick; M. D. White

1978-01-01

405

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for Test 154R  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 154R which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 154R was conducted to obtain

G. S. Massengill; R. A. Hedrick; M. D. White

1978-01-01

406

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 171  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 171, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 171

V. D. Clemons; W. G. Craddick; R. M. Flanders

1980-01-01

407

PWR blowdown heat transfer separate-effects program. Thermal-hydraulic test facility experimental data report for test 152  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 152, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in PWR system. Test 152 was conducted to obtain CHF

V. D. Clemons; R. A. Hedrick; M. D. White

1978-01-01

408

PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for Test 162  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 162, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 162

V. D. Clemons; W. G. Craddick; M. D. White

1980-01-01

409

PWR blowdown heat transfer separate-effects program. Thermal-Hydraulic Test Facility experimental data report for test 155  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 155, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accidnet in a PWR system. Test 155 was conduced to obtain

V. D. Clemons; R. A. Hedrick; M. D. White

1978-01-01

410

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 165  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 165, which is part of the Oak Rdige National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 165

V. D. Clemons; W. G. Craddick; M. D. White

1980-01-01

411

PWR blowdown heat transfer separate-effects program. Thermal-hydraulic test facility experimental data report for test 157  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 157, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 157 was conducted to obtain

G. S. Massengill; R. A. Hedrick; M. D. White

1978-01-01

412

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 164R  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 164R, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 164R

V. D. Clemons; W. G. Craddick; R. M. Flanders

1980-01-01

413

PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for test 104  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 104, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in the PWR system. Test 104 was conducted to obtain

D. M. Leon; M. D. White; P. A. Moore; R. A. Hedrick

1978-01-01

414

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 160  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 160, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 160

V. D. Clemons; W. G. Craddick; M. D. White

1980-01-01

415

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 161  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 161, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 161

V. D. Clemons; W. G. Craddick; M. D. White

1980-01-01

416

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 151  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 151, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 151 was conducted to obtain

D. M. Leon; M. D. White; R. A. Hedrick

1978-01-01

417

PWR Blowdown Heat Transfer Separate-Effects Program. Thermal-Hydraulic Test Facility experimental data report for test 167R  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 167R, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 167R was conducted to obtain

V. D. Clemons; R. A. Hedrick; M. D. White

1978-01-01

418

PWR Blowdown Heat Transfer Separated-Effects Program. Thermal-Hydraulic Test Facility experimental data report for test 102. [PWR  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 102, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 102 was conducted to investigate

V. D. Clemons; M. D. White; P. A. Moore; R. A. Hedrick

1978-01-01

419

PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for Test 163  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal Hydraulic Test Facility (THTF) test 163, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in PWR system. Test 163

V. D. Clemons; W. G. Craddick; R. M. Flanders

1980-01-01

420

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 101  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 101, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 101 was conducted to investigate

M. D. White; R. A. Hedrick

1977-01-01

421

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 156. [PWR  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 156 which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 156 was conducted to obtain

G. S. Massengill; R. A. Hedrick; M. D. White

1978-01-01

422

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for Test 153  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 153, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 153 was conducted to obtain

D. M. Leon; R. A. Hedrick; M. D. White

1978-01-01

423

PWR Blowdown Heat Transfer Separate-Effects Program. Thermal-Hydraulic test Facility experimental data report for Test 168R  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 168R, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 168R was conducted to obtain

V. D. Clemons; R. A. Hedrick; M. D. White

1978-01-01

424

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 100  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 100, which is part of the ORNL Pressurized-Water-Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 100 was conducted to investigate the

M. D. White; R. A. Hedrick

1977-01-01

425

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 158  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 158, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 158 was conducted to obtain

V. D. Clemons; R. A. Hedrick; M. D. White

1978-01-01

426

PWR Blowdown Heat Transfer Separate-Effects Program. Thermal-Hydraulic Test Facility experimental data report for test 166S  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 166S, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system. Test 166S was conducted to obtain

V. D. Clemons; M. D. White; R. A. Hedrick

1978-01-01

427

Effects of Computer-Based Test Administrations on Test Anxiety and Performance.  

ERIC Educational Resources Information Center

Examines the degree to which computer and test anxiety have a predictive role in performance across three computer-administered placement tests. Subjects (72 undergraduate students) were measured with the Computer Anxiety Rating Scale, the Test Anxiety Inventory, and the Myers-Briggs Type Indicator. Results suggest that much of what is considered…

Shermis, Mark D.; Lombard, Danielle

1998-01-01

428

The Effect of Computers on the Test and Inter-Rater Reliability of Writing Tests of ESL Learners  

ERIC Educational Resources Information Center

This research aimed to investigate the effect of computers on the test and inter-rater reliability of writing test scores of ESL learners. Writing samples of 20 pen-paper and 20 computer group students were scored in analytic scoring method by two scorers, and then the scores were analyzed in Alpha (Cronbach) model. The results showed that the…

Aydin, Selami

2006-01-01

429

Methods for testing the strength of cancellous bone and tested method effects on cortical bone in the ovariectomized rat  

E-print Network

In this study, two mechanical testing procedures were developed to test the strength of cancellous bone from the proximal tibia of the rat, the "punch method" and the "whole slice method". These were used to quantify the effect of ovariectomy on rat...

Ruhmann, Sean Phillip

2012-06-07

430

Accelerated life testing effects on CMOS microcircuit characteristics  

NASA Technical Reports Server (NTRS)

The 250 C, 200C and 125C accelerated tests are described. The wear-out distributions from the 250 and 200 C tests were used to estimate the activation energy between the two test temperatures. The duration of the 125 C test was not sufficient to bring the test devices into the wear-out region. It was estimated that, for the most complex of the three devices types, the activation energy between 200 C and 125 C should be at least as high as that between 250 C and 200 C. The practicality of the use of high temperature for the accelerated life tests from the point of view of durability of equipment is assessed. Guidlines for the development of accelerated life-test conditions are proposed. The use of the silicon nitride overcoat to improve the high temperature accelerated life-test characteristics of CMOS microcircuits is described.

1980-01-01

431

A short-term testing effect in cross-language recognition.  

PubMed

Taking a memory test after an initial study phase produces better long-term retention than restudying the items, a phenomenon known as the testing effect. We propose that this effect emerges because testing strengthens semantic features of items' memory traces, whereas restudying strengthens surface features of items' memory traces. This novel account predicts that a testing effect should be observed even after a short retention interval when a language switch occurs between the learning phase and the final test phase. We assessed this prediction with Dutch-English bilinguals who learned Dutch Deese-Roediger-McDermott word lists through restudying or through testing (retrieval practice). Five minutes after this learning phase, they took a recognition test in Dutch (within-language condition) or in English (across-language condition). We observed a testing effect in the across-language condition, but not in the within-language condition. These findings corroborate our novel account of the testing effect. PMID:22539332

Verkoeijen, Peter P J L; Bouwmeester, Samantha; Camp, Gino

2012-06-01

432

The Effect of Anxiety and Boredom on Cognitive Test Performance.  

ERIC Educational Resources Information Center

Two factors which act to depress cognitive test performance are referred to as anxiety and boredom. The responses to a 20-item adjectival checklist administered to high school seniors after completing a cognitive test battery were subjected to iterative principal axes factor analysis. The relationships between anxiety or boredom and test

Brown, George H.; Carroll, C. Dennis

433

Effect of Self-Assessment on Test Scores: Student Perceptions  

ERIC Educational Resources Information Center

After a sudden increase in most of the individual grades in a multiple-choice test, students were asked to rank the three most relevant factors responsible for this outcome. Among eight others, the availability of a test for self-assessment before the final test was by far the most frequently mentioned (82.4% of the students). Questions applied…

Ramirez, Beatriz U.

2010-01-01

434

Jaw effects in yarn testing Ioannis P. GIANNOPOULOS1  

E-print Network

, slackness, yarn, clamping device, Kevlar 49 ABSTRACT: One of the major issues in yarn testing for tensile, tensile tests for Kevlar 49 yarns at various temperatures (25o C to 160o C) and nominal lengths (350, 250 successfully tested Kevlar 49 specimens. Howeve

Burgoyne, Chris

435

Effects of neutral point reactors and series capacitors on geomagnetically induced currents in a high-voltage electric power transmission system  

NASA Astrophysics Data System (ADS)

Geomagnetically induced currents (GIC) are DC-like currents compared to power transmission frequencies. Consequently, it may be possible to reduce the magnitudes of GIC by installing resistive components or series capacitors into a power grid. We simulate the effects of neutral point reactors and series capacitors on GIC in the Finnish 400 kV network. Reactors add an additional resistance to earthing leads of transformers, and series capacitors block the flow of GIC in transmission lines. The geoelectric field impacting the system is considered to be uniform. The use of reactors does not necessarily reduce the GIC risk. Although the installation of reactors tends to decrease GIC on the average, maximum GIC may even increase. Assuming a reactor at all stations results in a 50% reduction of the maximum GIC compared to the situation with no reactors. With up to four series capacitors, the maximum GIC is reduced by 40% when they are optimally located. However, even small changes in the topology of the grid can cause large changes in GIC. A combination of reactors and series capacitors could in principle provide a way to diminish the GIC risk. This study also emphasizes the difficulty of preventing GIC problems by these means.

ArajäRvi, Esko; Pirjola, Risto; Viljanen, Ari

2011-11-01

436

Development and Demonstration of a Computational Tool for the Analysis of Particle Vitiation Effects in Hypersonic Propulsion Test Facilities  

NASA Technical Reports Server (NTRS)

In order to improve the understanding of particle vitiation effects in hypersonic propulsion test facilities, a quasi-one dimensional numerical tool was developed to efficiently model reacting particle-gas flows over a wide range of conditions. Features of this code include gas-phase finite-rate kinetics, a global porous-particle combustion model, mass, momentum and energy interactions between phases, and subsonic and supersonic particle drag and heat transfer models. The basic capabilities of this tool were validated against available data or other validated codes. To demonstrate the capabilities of the code a series of computations were performed for a model hypersonic propulsion test facility and scramjet. Parameters studied were simulated flight Mach number, particle size, particle mass fraction and particle material.

Perkins, Hugh Douglas

2010-01-01

437

TREAT F-series LMFBR loss-of-flow experiments  

SciTech Connect

The F-series tests are done to study fuel behavior in an LMFBR LOF accident. These tests are performed in dry (no sodium) capsules to separate out effects of sodium on fuel behavior and, in F3 and subsequent tests, to permit visual observation. Justification for a dry capsule is that the fuel behavior of interest such as fuel-pin breakup and extensive axial motion are assumed to occur after sodium voiding in a LOF accident. Two distinct F-series designs have been subject to TREAT tests. The design used for tests F1 and F2 permitted a study of extensive axial fuel motion and used the fast neutron hodoscope as the principal instrumentation. The second design, used for tests F3 and F4 and to e used for tests F5 and F6, permits a study of fuel pin break-up with high speed photography as the principal instrumentation.

Palm, R.G.

1982-01-01

438

Effects of the cold pressor test on short-term fluctuations of finger arterial blood pressure and heart rate in normal subjects  

Microsoft Academic Search

The effect of the cold pressor test on autonomic cardiovascular control was studied non-invasively by means of spectrum analysis of periodic heart rate and blood pressure fluctuations in ten normal subjects. Fast Fourier Transform algorithm based on a 256-point time series (sampling rate 2 Hz, i.e. 2-min and 8-s) was used to estimate the amplitude spectra of heart rate and

Frank Weise; Dominique Laude; Arlette Girard; Philippe Zitoun; Jean-Philippe Siché; Jean-Luc Elghozi

1993-01-01

439

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 160  

SciTech Connect

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 160, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 160 was conducted to determine (through comparisons with tests 151 and 155) the effect of altered initial core power levels on fuel rod simulator surface temperature and surface flux behavior in the THTF electric core. The primary purpose of this report is to make the reduced instrument responses during test 160 available. The responses are presented in graphical form in engineering units and have been analyzed only to the extent necessary to assure reasonableness and consistency. 500 figs., 5 tabs.

Clemons, V.D.; Craddick, W.G.; White, M.D.

1980-06-01

440

PWR Blowdown Heat Transfer Separate-Effects Program: Thermal-Hydraulic Test Facility experimental data report for test 161  

SciTech Connect

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 161, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 161 was conducted to determine (through comparisons with tests 153 and 155) the effect of bundle outlet fluid temperature on the behavior of fuel rod simulator surface temperatures and surface fluxes in the THTF electric core. The primary purpose of this report is to make the reduced instrument responses during test 161 available. The responses are presented in graphical form in engineering units and have been analyzed only to the extent necessary to assure reasonableness and consistency. Microfiche data are included.

Clemons, V.D.; Craddick, W.G.; White, M.D.

1980-06-01

441

Clinical Practice Patterns and Cost-Effectiveness of HER2 Testing Strategies in Breast Cancer Patients  

PubMed Central

Background Testing technologies are increasingly used to target cancer therapies. Human epidermal growth factor receptor 2 (HER2) testing to target trastuzumab for patients with breast cancer provides insights into the evidence needed for emerging testing technologies. Methods We reviewed literature on HER2 test utilization and cost-effectiveness of HER2 testing for patients with breast cancer. We examined available evidence on: percentage of eligible patients tested for HER2; test methods used; concordance of test results between community and central/reference laboratories; use of trastuzumab by HER2 test result; and cost-effectiveness of testing strategies. Results Little evidence is available to determine whether all eligible patients are tested; how many are retested to confirm results; and how many with negative HER2 test results still receive trastuzumab. Studies suggest that up to 66% of eligible patients had no documentation of testing in claims records; up to 20% of patients receiving trastuzumab were not tested or had no documentation of a positive test; and 20% of HER2 results may be incorrect. Few cost-effectiveness analyses of trastuzumab explicitly considered the economic implications of various testing strategies. Conclusions There is little information about the actual use of HER2 testing in clinical practice, but evidence suggests important variations in testing practices and key gaps in knowledge exist. Given the increasing use of targeted therapies, it is critical to build an evidence base that supports informed decision-making on emerging testing technologies in cancer care. PMID:19753618

Phillips, Kathryn A.; Marshall, Deborah A.; Haas, Jennifer S.; Elkin, Elena B.; Liang, Su-Ying; Hassett, Michael J.; Ferrusi, Ilia; Brock, Jane E.; Van Bebber, Stephanie L

2009-01-01

442

Castle series, 1954. Technical report  

SciTech Connect

CASTLE was an atmospheric nuclear weapons test series held in the Marshall Islands at Enewetak and Bikini atolls in 1954. This is a report of DOD peronnel in CASTLE with an emphasis on operations and radiological safety.

Martin, E.J.; Rowland, R.H.

1982-04-01

443

Electronic Effects of Ligand Substitution on Spin Crossover in a Series of Diiminoquinonoid-Bridged Fe(II)2 Complexes.  

PubMed

A series of four isostructural Fe(II)2 complexes, [(TPyA)2Fe2((X)L)](2+) (TPyA = tris(2-pyridylmethyl)amine; (X)L(2-) = doubly deprotonated form of 3,6-disubstituted-2,5-dianilino-1,4-benzoquinone; X = H, Br, Cl, and F), were synthesized to enable a systematic study of electronic effects on spin crossover behavior. Comparison of X-ray diffraction data for these complexes reveals the sole presence of high-spin Fe(II) at 225 K and mixtures of high-spin and low-spin Fe(II) at 100 K, which is indicative of incomplete spin crossover. In addition, crystal packing diagrams show that these complexes are well-isolated from one another in the solid state, owing primarily to the presence of bulky tetra(aryl)borate counteranions, such that spin crossover is likely not significantly affected by intermolecular interactions. Variable-temperature dc magnetic susceptibility data confirm the structural observations and reveal that 54(1), 56(1), 62(1), and 84(1)% of Fe(II) centers remain high-spin even below 65 K. Moreover, fits to magnetic data provide crossover temperatures of T1/2 = 160(1), 124(1), 121(1), and 110(1) K for X = H, Br, Cl, and F, respectively, along with enthalpies of ?H = 11.4(3), 8.5(3), 8.3(3), and 7.5(2) kJ/mol, respectively. These parameters decrease with increasing electronegativity of X and thus increasing electron-withdrawing character of (X)L(2-), suggesting that the observed trends originate primarily from inductive effects of X. Moreover, when plotted as a function of the Pauling electronegativity of X, both T1/2 and ?H undergo a linear decrease. Further analyses of the low-temperature magnetic data and variable-temperature Mössbauer spectroscopy suggest that the incomplete spin crossover behavior in [(TPyA)2Fe2((X)L)](2+) is best described as a transition from purely [FeHS-FeHS] (HS = high-spin) complexes at high temperature to a mixture of [FeHS-FeHS] and [FeHS-FeLS] (LS = low-spin) complexes at low temperature, with the number of [FeHS-FeHS] species increasing with decreasing electron-withdrawing character of (X)L(2-). PMID:25496124

Park, Jesse G; Jeon, Ie-Rang; Harris, T David

2015-01-01

444

Proton Effects and Test Issues for Satellite Designers  

NASA Technical Reports Server (NTRS)

Microelectronic and photonic systems in the natural space environment are bombarded by a variety of charged particles including electrons, trapped protons, cosmic rays, and solar particles (protons and other heavy ions). These incident particles cause both ionizing and non-ionizing effects when traversing a device, and the effects can be either transient or permanent. The vast majority of the kinetic energy of an incident proton is lost to ionization, creating the single event effects (SEES) and total ionizing dose (TID) effects. However, the small portion of energy lost in non-ionizing processes causes atoms to be removed from their lattice sites and form permanent electrically active defects in semiconductor materials. These defects, i.e., "displacement damage," can significantly degrade device performance. In general, most of the displacement damage effects in the natural space environment can be attributed to protons since they are plentiful and extremely energetic (and therefore not readily shielded against). For this reason, we consider only proton induced displacement damage in this course. (Nevertheless, we identify solar cells as an important example of a case where both electron and proton damage can be important since only very light shielding is feasible.) The interested reader is encouraged to explore the three previous NSREC and RADECS short courses which also treat displacement damage issues for satellite applications. Part A of this segment of the short course introduces the space environment, proton shielding issues, and requirements specifications for proton-rich environments. In order to exercise the displacement damage analysis tools for on-orbit performance predictions, the requirements document must provide the relevant proton spectra in addition to the usual total ionizing dose-depth curves. Ion-solid interactions and the nature of the displacement damage they generate have been studied extensively for over half a century, yet they still remain a subject of investigation. In this section, a description of the mechanisms by which displacement damage is produced will be followed by a summary of the major consequences for device performance in a space environment. Often the degradation of a device parameter can be characterized by a damage factor (measured in a laboratory using monoenergetic protons) that is simply the change in a particular electrical or optical parameter per unit proton fluence. In addition, we will describe the concept of a non-ionizing energy loss rate (NIEL) which quantifies that portion of the energy lost by an incident ion that goes into displacements. It has been calculated as a function of proton energy, and is analogous to (and has the same units as) the linear energy transfer (LET) for ionizing energy. We will discover that, to first order, the calculated NIEL describes the energy dependence of the measured device damage factors. This observation provides the basis for predicting proton induced device degradation in a space environment based on both the calculated NIEL and relatively few laboratory test measurements. The methodology of such on-orbit device performance predictions will be described, as well as the limitations. Several classes of devices for which displacement damage is a significant (if not the dominant) mode of radiation induced degradation will be presented.

Marshall, Cheryl J.; Marshall, Paul W.

1999-01-01

445

Polytomous Adaptive Classification Testing: Effects of Item Pool Size, Test Termination Criterion, and Number of Cutscores  

ERIC Educational Resources Information Center

Computer-adaptive classification tests focus on classifying respondents in different proficiency groups (e.g., for pass/fail decisions). To date, adaptive classification testing has been dominated by research on dichotomous response formats and classifications in two groups. This article extends this line of research to polytomous classification…

Gnambs, Timo; Batinic, Bernad

2011-01-01

446

Lysine vasopressin blocks the effect of chlorodiazepoxide in behavioral tests  

Microsoft Academic Search

The aim of the study presented here was to determine the influence of subcutaneously administered lysine-vasopressin (LVP, 1 U\\/kg, s.c.), chlorodiazepoxide (BDZ, 20 mg\\/kg, i.p.), and vehicle (veh, chlorobutanol + saline (0.85%) + Tween 80, 0.1 mL\\/100 g) administered through the peritoneum on anxiety-related-behavior using the Vogel conflict test, the elevated plus-maze test (EPM) and the marble-burying test. The results

Edvaldo Rodrigues de Almeida

2008-01-01

447

ETV TEST REPORT OF CONTROL OF BIOAEROSOLS IN HVAC SYSTEMS GLASFLOSS INDUSTRIES Z-PAK SERIES S, MODEL ZPS24241295BO  

EPA Science Inventory

The Environmental Technology Verification report discusses the technology and performance of the Z-Pak Series S, Model ZPS24241295B0 air filter for dust and bioaerosol filtration manufactured by Glasfloss Industries, Inc. The pressure drop across the filter was 91 Pa clean and 34...

448

Turkey Flat Site Effects Test Area The Turkey-Flat strong motion "blind"  

E-print Network

Turkey Flat Site Effects Test Area B B' A A' C C' The Turkey-Flat strong motion "blind" prediction Geological Survey Turkey Flat, USA Site Effects Test Area: "Blind" Test of Predicted Ground Response of a Shallow Stiff-Soil Site to the September 28, 2004 M6.0 Parkfield Earthquake Turkey Flat Working Group Stay

Oprsal, Ivo

449

40 CFR 53.56 - Test for effect of variations in ambient pressure.  

Code of Federal Regulations, 2011 CFR

...Test for effect of variations in ambient pressure. 53.56 Section 53.56 Protection...Test for effect of variations in ambient pressure. (a) Overview. (1) This...under variations in ambient (barometric) pressure. Tests shall be conducted in a...

2011-07-01

450

40 CFR 53.56 - Test for effect of variations in ambient pressure.  

Code of Federal Regulations, 2012 CFR

...Test for effect of variations in ambient pressure. 53.56 Section 53.56 Protection...Test for effect of variations in ambient pressure. (a) Overview. (1) This...under variations in ambient (barometric) pressure. Tests shall be conducted in a...

2012-07-01

451

Interreservoir interactions: Effects of a new reservoir on organic matter production and processing in a multiple-impoundment series  

SciTech Connect

Impoundment of the R.B. Russell Reservoir (RBR) between two existing reservoirs (Hartwell Reservoir (HT) upstream and Clark Hill Reservoir (CH) downstream) on the Savannah River (Georgia-South Carolina, USA) provided an opportunity to investigate the limnological influence of interreservoir transfers of nutrients and organic matter down a multiple-impoundment series. The objective was to document within- and among-reservoir patterns in organic matter production and processing in the HT-RBR-CH reservoir series as organic matter dynamics were influenced by the inundation and subsequent stabilization of the RBR basin.

Kimmel, B.L.; Soballe, D.M.; Adams, S.M.; Palumbo, A.V.; Ford, C.J.; Bevelhimer, M.S.

1987-01-01

452

ANALYSIS OF THE EFFECTIVENESS OF STUDENTS' TEST DATA C. Stringfellow, Z. Kurunthottical  

E-print Network

ANALYSIS OF THE EFFECTIVENESS OF STUDENTS' TEST DATA C. Stringfellow, Z. Kurunthottical Department.stringfellow@mwsu.edu, zenink@hotmail.com ABSTRACT One of the challenges for students is to come up with appropriate test cases to test the applications they develop. The challenge for instructors is to come up with a small test suite

Stringfellow, Catherine V.

453

State Standardized Testing Programs: Their Effects on Teachers and Students  

ERIC Educational Resources Information Center

A driving force in standards-based educational reform was the 1983 release of "A Nation at Risk: The Imperative for Educational Reform" (National Commission of Excellence in Education [NCEE], 1983). The report called for "an end to the minimum competency testing movement and the beginning of a high-stakes testing movement that would raise the…

Moon, Tonya R.; Brighton, Catherine M.; Jarvis, Jane M.; Hall, Catherine J.

2007-01-01

454

Teacher's Perceptions of the Effects of Testing Accommodations  

ERIC Educational Resources Information Center

This research investigates teachers' perceptions of testing accommodations to the Ontario Secondary School Literacy Test (OSSLT) for students with special needs. The study reports findings from 98 Northeastern Ontario grade 9 and 10 English teachers who were involved in providing accommodations to the OSSLT. Teachers who responded to the Teacher…

Brackenreed, Darlene

2004-01-01

455

Effects of Bogus Feedback on Intelligence Test Performance  

Microsoft Academic Search

French-Canadian high school students (N = 196) completed different forms of the Wonderlic Personnel Test (WPT; E. F. Wonderlic, 1983) on two occasions. Before the second test, they received negative or positive bogus feedback about their initial performance. Most students (n = 158) were informed that the WPT measured intelligence, and the instruction was issued before either the first (n

FranÇOis L. Rousseau; Stuart J. McKelvie

2000-01-01

456

POREWATER CHEMISTRY: EFFECTS OF SAMPLING, STORAGE, HANDLING, AND TOXICITY TESTING  

EPA Science Inventory

As a general principle, it is nearly impossible to remove a porewater sample from sediment, use it in a toxicity testing vessel with test organisms, and prevent changes in the chemistry of the natural and anthropogenic organic and inorganic constituents. The degree of change in t...

457

Effects of Instruction and Stage-Fright on Intelligence Testing  

ERIC Educational Resources Information Center

In the present research, it was tried to unravel the influence of various types of instruction on test anxiety levels and, in turn, its influence on intelligence test performance. Three types of instruction were compared: a stressful, achievement-orientated instruction; a reassuring, task-orientated instruction; and an ambiguous instruction.…

Meijer, Joost; Oostdam, Ron

2011-01-01

458

Multiple Stress Effect Analysis on Pneumatic Cylinders Accelerated Life Testing  

Microsoft Academic Search

Accelerated life testing is a valuable tool to get information quickly on lifetime distribution which is achieved by subjecting the test units to conditions that are more severe than the normal ones. This paper firstly describes a model for multiple stress-type accelerated life data which is based on the widely known log-linear model and is formulated with Weibull model for

Chen Juan; Wang Deyi; Wu Qiang; Wang Zhanlin

2009-01-01

459

The averaging effect of odorant mixing as determined by air dilution sensory tests: a case study on reduced sulfur compounds.  

PubMed

To learn more about the effects of mixing different odorants, a series of air dilution sensory (ADS) tests were conducted using four reduced sulfur compounds [RSC: hydrogen sulfide (H(2)S), methanethiol (CH(3)SH), dimethylsulfide (DMS), and dimethyldisulfide (DMDS)] at varying concentration levels. The tests were initially conducted by analyzing samples containing single individual RSCs at a wide range of concentrations. The resulting data were then evaluated to define the empirical relationship for each RSC between the dilution-to-threshold (D/T) ratio and odor intensity (OI) scaling. Based on the relationships defined for each individual RSC, the D/T ratios were estimated for a synthetic mixture of four RSCs. The effect of mixing was then examined by assessing the relative contribution of each RSC to those estimates with the aid of the actually measured D/T values. This stepwise test confirmed that the odor intensity of the synthetic mixture is not governed by the common theoretical basis (e.g., rule of additivity, synergism, or a stronger component model) but is best represented by the averaged contribution of all RSC components. The overall results of this study thus suggest that the mixing phenomenon between odorants with similar chemical properties (like RSC family) can be characterized by the averaging effect of all participants. PMID:22319360

Kim, Ki-Hyun

2011-01-01

460

Substituent effect on supramolecular motifs in series of succinimide polycyclic keto derivatives - Spectroscopic, theoretical and crystallographic studies  

NASA Astrophysics Data System (ADS)

The substituent effect on the supramolecular arrangement in a series of polycyclic monoimide keto derivatives crystals was studied. Single crystal X-ray diffraction and IR spectroscopic experiments were performed for seven related compounds, as well as the Hirshfeld surface analysis and quantum chemical calculations at HF and DFT levels in vacuo, in solution and for small clusters. The presence of Cdbnd O group at the bridge of the main hydrocarbon skeleton implied the catemer motif of the Nimidesbnd H⋯Oimide hydrogen bond in case of smaller substituents (Hsbnd , MeOsbnd , EtOsbnd ). For more voluminous groups (iBuOsbnd ) or additional hydrogen bond acceptors (AcOsbnd , Odbnd ) the steric hindrance increased and the imide⋯imide interactions were no longer present in the solid state. The Nimidesbnd H⋯Oketo or Nimidesbnd H⋯Oester hydrogen bonds were formed instead. The binding energy per one Nsbnd H⋯O interaction calculated for supramolecular clusters at HF/6-31G(d,p) level was ca. 20 kJ mol-1, indicating moderate strength of this hydrogen bond. The solvation free energies and induced dipole moments were computed at B3LYP/6-311+G(d,p) level using the integral equation formalism model (IEF PCM) considering three solvents of various polarity: non-polar chloroform, polar aprotic dimethyl sulfoxide (DMSO) and polar protic water. The relations between the vibrational spectra and the crystal structure have been discussed. The following sequence of carbonyl stretching modes in IR spectra has been derived from quantum chemical calculations: (1) at the highest frequencies - the symmetric vibration of two imide Cdbnd O bonds, (2) the vibrations of keto Cdbnd O bonds attached directly to the polycyclic hydrocarbon skeleton, (3) the asymmetric vibration of two imide Cdbnd O bonds, and (4) at the lowest frequencies - the vibration of ester Cdbnd O group. The characteristic peaks observed in imide experimental IR spectra at about 3080 cm-1 have been explained as overtone and combination bands of ?Cdbnd O stretching and ?Nsbnd H out-of-plane bending vibrations.

Miroslaw, Barbara; Koziol, Anna E.; Bielenica, Anna; Dziuba, Kamil; Struga, Marta

2014-09-01

461

A New Panel Test Facility for Effective Thermal Conductivity Measurements up to 1,650°C  

NASA Astrophysics Data System (ADS)

A new steady-state panel test facility is presented which has been designed and constructed for effective thermal-conductivity measurements of insulations in the temperature range between 300 and 1,650°C following ASTM C201-93 and DIN V ENV-1094. Square-shaped samples (length of 400 mm) are used, heated from above and settled on a water-cooled calorimeter system to obtain a one-dimensional steady-state temperature field. The heat is supplied by electrical heating elements freely hanging inside a furnace which is completely constructed from ceramic components to withstand temperatures up to about 1,800°C. The calorimeter system consists of a square central measuring zone (length of 100 mm) surrounded by guard loops to avoid heat losses in all directions. The samples, e.g., a number of fiber mats, one on top of the other up to a maximum height of 110 mm, are open to ambient pressure and atmosphere (air). Measurements include the heat flow rate (taken in the central calorimeter), temperature differences across individual layers of the sample (measured by a series of thermocouples which regularly have to be calibrated), and the thickness of the respective layers (before and after the experiment). The thermal conductivities range from 0.025 to 2 W · m-1 · K-1, and both isotropic and non-isotropic materials can be investigated due to the one-dimensional characteristic of the temperature field. Measurements for alumina fiber mats are presented, and good agreement is found with respective results from other methods and test facilities.

Barth, Gerald; Gross, Ulrich; Wulf, Rhena

2007-10-01

462

PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for Test 163  

SciTech Connect

Reduced instrument responses are presented for Thermal Hydraulic Test Facility (THTF) test 163, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in PWR system. Test 163 was conducted to determine the effect of moving the pressurizer surge line from downstream to upstream of the main heat exchangers. The primary purpose of this report is to make the reduced instrument responses during test 163 available. The responses are presented in graphical form in engineering units and have been analyzed only to the extent necessary to assure reasonableness and consistency. 500 figures included in supplemental microfiche, 5 tabs.

Clemons, V.D.; Craddick, W.G.; Flanders, R.M.

1980-06-01

463

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 165  

SciTech Connect

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 165, which is part of the Oak Rdige National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 165 was conducted to determine the effect of an intact hot leg on the behavior of fuel rod simulator surface temperatures and surface fluxes in the THTF electric core. The primary purposes of this report is to make the reduced instrument responses during test 165 available. The responses are presented in graphical form in engineering units and have been analyzed only to the extent necessary to assure reasonableness and consistency. (Microfiche data are included.)

Clemons, V.D.; Craddick, W.G.; White, M.D.

1980-06-01

464

The effects of tests on learning and forgetting.  

PubMed

In three experiments, we investigated whether memory tests enhance learning and reduce forgetting more than additional study opportunities do. Subjects learned obscure facts (Experiments 1 and 2) or Swahili-English word pairs (Experiment 3) by either completing a test with feedback (test/study) or receiving an additional study opportunity (study). Recall was tested after 5 min or 1, 2, 7, 14, or 42 days. We explored forgetting by means of an ANOVA and also by fitting a power function to the data. In all three experiments, testing enhanced overall recall more than restudying did. According to the power function, in two out of three experiments, testing also reduced forgetting more than restudying did, although this was not always the case according to the ANOVA. We discuss the implications of these results both for approaches to measuring forgetting and for the use of tests in promoting long-term retention. The stimuli used in these experiments may be found at www.psychonomic.org/archive. PMID:18426072

Carpenter, Shana K; Pashler, Harold; Wixted, John T; Vul, Edward

2008-03-01

465

PWR Blowdown Heat Transfer Separate-Effects Program. Thermal-Hydraulic Test Facility experimental data report for test 103  

Microsoft Academic Search

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 103, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in a PWR system.

V. D. Clemons; M. D. White; P. A. Moore; R. A. Hedrick

1978-01-01

466

A gamma-ray testing technique for spacecraft. [considering cosmic radiation effects  

NASA Technical Reports Server (NTRS)

The simulated cosmic radiation effect on a spacecraft structure is evaluated by gamma ray testing in relation to structural thickness. A drawing of the test set-up is provided and measurement errors are discussed.

Gribov, B. S.; Repin, N. N.; Sakovich, V. A.; Sakharov, V. M.

1977-01-01

467

PWR blowdown heat transfer separate-effects program: Thermal-Hydraulic Test Facility experimental data report for test 171  

SciTech Connect

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 171, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 171 was an isothermal test conducted to gain baseline information about the hydrodynamic behavior of the facility with the pressurizer surge line located upstream of the main heat exchangers. The primary purpose of this report is to make the reduced instrument responses during test 171 available. The responses are pressurized in graphical form in engineering units and have been analyzed only to the extent necessary to assure reasonableness and consistency. Microfiche data is included.

Clemons, V.D.; Craddick, W.G.; Flanders, R.M.

1980-06-01

468

PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for Test 162  

SciTech Connect

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 162, which is part of the Oak Ridge National Laboratory Pressurized-Water Reactor (ORNL-PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident (LOCA) in a PWR system. Test 162 was a duplicate of test 152 and was conducted to verify repeatability of system response. The primary purpose of this report is to make the reduced instrument responses during test 162 available. The responses are presented in graphical form in engineering units and have been analyzed only to the extent necessary to assure reasonablen