Sample records for effects test series

  1. Test Bashing Series.

    ERIC Educational Resources Information Center

    Phelps, Richard P.

    This document consists of 14 articles which appeared in the electronic news bulletin, "EducationNews.org," and which were part of a series on "Test Bashing," a discussion of the use of standardized tests that focuses on controversies surrounding the Texas Assessment of Academic Skills and test score improvements in Texas. The articles are: (1)…

  2. SERIES-X test results

    NASA Astrophysics Data System (ADS)

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

    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.

  3. The Mann-Kendall Test Modified by Effective Sample Size to Detect Trend in Serially Correlated Hydrological Series

    Microsoft Academic Search

    Sheng Yue; ChunYuan Wang

    2004-01-01

    The non-parametric Mann-Kendall (MK) statistical test has been popularly used to assess the significance of trend in hydrological time series. The test requires sample data to be serially independent. When sample data are serially correlated, the presence of serial correlation in time series will affect the ability of the test to correctly assess the significance of trend. To eliminate the

  4. Outline test plan for test series I

    SciTech Connect

    Not Available

    1981-02-01

    The overall technical objectives for the Phase 1 programme of the Grimethorpe Experimental Facility were presented in a draft document ''Phase 1 Research Programme: Baseline and Modified Option Cases'', produced in May 1979 and discussed at subsequent Technical Committee Meetings. The technical objectives for Test Series 1 presented in this document have developed from those outlined in the May 79 baseline; all the changes from the earlier outline are recorded. The data collection systems expected to be used are also presented. It is planned to carry out experiments to meet the objectives in three sub-series each along a different ''good fluidisation'' line determined at high, medium and low velocities. The high velocity sub-series has four runs including the original design conditions for Tube Bank 'A'. The medium velocity sub-series has seven runs and involves operating Tube Bank 'A' at what are to be its optimum operating conditions. The low velocity sub-series has six runs including the CURL Link Test operating conditions.

  5. RELAP5/MOD2.5 simulation results for the Separate Effects Test experiment series, Phase 1

    SciTech Connect

    Gaeta, M.J. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Bollinger, J.S.; Dimenna, R.A. [Westinghouse Savannah River Co., Aiken, SC (United States)

    1993-05-01

    The Separate Effects Test (SET) facility is a one-fourth linear scale model of a portion of a production reactor at the Savannah River Site. The Phase I configuration is prototypical of a one-sixth sector of the moderator tank and a portion of a single pump suction piping (PSP) loop. The purpose of this work was to perform a preliminary investigation into the suitability of the full-scale SRL reactor modeling methodology to the one-fourth linear scale SET facility. The resulting model will also aid in understanding the experimental results produced by the SET experimental test series. Section 2 gives a brief description of the experimental facility. Section 3 describes the code version of RELAP5 used for this work and the SET input model constructed for the simulations. Section 4 describes the results of the model tuning and the single and two-phase simulations. Sections 5 and 6 contain the conclusions and references respectively.

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

    ERIC Educational Resources Information Center

    Collins, Lisa

    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;…

  7. The effect of cell design and test criteria on the series/parallel performance of nickel cadmium cells and batteries

    NASA Technical Reports Server (NTRS)

    Halpert, G.; Webb, D. A.

    1983-01-01

    Three batteries were operated in parallel from a common bus during charge and discharge. SMM utilized NASA Standard 20AH cells and batteries, and LANDSAT-D NASA 50AH cells and batteries of a similar design. Each battery consisted of 22 series connected cells providing the nominal 28V bus. The three batteries were charged in parallel using the voltage limit/current taper mode wherein the voltage limit was temperature compensated. Discharge occurred on the demand of the spacecraft instruments and electronics. Both flights were planned for three to five year missions. The series/parallel configuration of cells and batteries for the 3-5 yr mission required a well controlled product with built-in reliability and uniformity. Examples of how component, cell and battery selection methods affect the uniformity of the series/parallel operation of the batteries both in testing and in flight are given.

  8. Adaptive split test for multivariate time series classification trees Adaptive split test for multivariate time series

    E-print Network

    Paris-Sud XI, Université de

    Adaptive split test for multivariate time series classification trees Adaptive split test for multivariate time series classification trees Ahlame Douzal Chouakria1 , Cécile Amblard1 LIG (Lab. d : This paper proposes an extension of the classification trees to time series input variables. A new split

  9. Technical Manual: 2002 Series GED Tests

    ERIC Educational Resources Information Center

    Ezzelle, Carol; Setzer, J. Carl

    2009-01-01

    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…

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

    NASA Technical Reports Server (NTRS)

    Moeller, Karl J.; Dudley, Kenneth L.

    1997-01-01

    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.

  11. Physics 116A Winter 2011 The Alternating Series Test

    E-print Network

    California at Santa Cruz, University of

    Physics 116A Winter 2011 The Alternating Series Test An alternating series is defined to be a series of the form: S = # # n=0 (-1) n a n , (1) where all the a n > 0. The alternating series test but property 1 and/or property 2 do not hold, then the alternating series test is inconclusive. Note

  12. Physics 116A Winter 2011 The Alternating Series Test

    E-print Network

    California at Santa Cruz, University of

    Physics 116A Winter 2011 The Alternating Series Test An alternating series is defined to be a series of the form: S = n=0 (-1)n an , (1) where all the an > 0. The alternating series test is a set and/or property 2 do not hold, then the alternating series test is inconclusive. Note that property 1

  13. Rocket vehicle targeting for the PLACES ionospheric plasma test series

    NASA Astrophysics Data System (ADS)

    Rollstin, L. R.

    1984-02-01

    The PLACES (Position Location And Communication Effects Simulations) test program, conducted in December 1980 at Eglin Gulf Test Range, involved a series of ionospheric releases of barium/barium-nitrate vapor. The Defense Nuclear Agency sponsored program investigated effects of a structured ionospheric plasma (similar to that produced by a high-altitude nuclear explosion) on satellite navigation systems and provided in situ measurement of plasma structure. Terrier-Tomahawk rocket systems boosted the barium payloads, beacon payloads (plasma occultation experiment), and probe payloads (plasma in situ measurement). Drifting plasma tracking procedures, beacon- and probe-vehicle targeting procedures, and vehicle flight test results are presented.

  14. 77 FR 38282 - Final Test Guidelines; OCSPP 850 Series; Notice of Availability

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-27

    ...EPA-HQ-OPPT-2009-0154; FRL-9333-1] Final Test Guidelines; OCSPP 850 Series; Notice of Availability...is announcing the availability of the final test guidelines for Series 850--Ecological Effects Test Guidelines, consisting of Groups B, C,...

  15. Tests for Convergence of a Series DEFINITION 1 (Convergence) An infinite series

    E-print Network

    Hurder, Steven

    Tests for Convergence of a Series DEFINITION 1 (Convergence) An infinite series i=1 = a1 + a2 + a3 + · · · + an + · · · con- verges to L if the sequence of partial sums sn = a1 + a2 + · · · an converges to a limit L, and does not "pop around". TEST 1 (Zero Test) If the series i=1 ai converges, then the terms ai 0. USE 1

  16. The Series Test As A Measure of Learning Potential. Studies in Learning Potential, v3, n47.

    ERIC Educational Resources Information Center

    Corman, Louise; Budoff, Milton

    The purposes of the study to determine psychometric characteristics of the Series Learning Potential Test, the effects of Learning Potential training on Series scores, and the relationship of Series scores to IQ, race, social class, and reading achievement. The Series Test was administered to students in 79 classrooms in five Connecticut towns…

  17. A comparison of tests for positive term series

    E-print Network

    Krohn, Stuart Anthony

    1977-01-01

    : 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...

  18. PHARMACOLOGY RESEARCH, SAFETY TESTING AND REGULATION SERIES ANTIBIOTIC RESISTANCE

    E-print Network

    Hemminga, Marcus A.

    #12;#12;PHARMACOLOGY ­ RESEARCH, SAFETY TESTING AND REGULATION SERIES ANTIBIOTIC RESISTANCE: CAUSES Substances S. B. Zotov and O. I. Tuzhikov ISBN: 978-1-60741-973-0 Antibiotic Resistance: Causes and Risk-1-60741-623-4 #12;PHARMACOLOGY ­ RESEARCH, SAFETY TESTING AND REGULATION SERIES ANTIBIOTIC RESISTANCE: CAUSES

  19. Shot HOOD: a test of the PLUMBBOB series, revised. Technical report

    Microsoft Academic Search

    C. Maag; M. Wilkinson; J. Striegel; B. Collins

    1983-01-01

    This report describes the activities of DoD personnel, both military and civilian, in Shot HOOD, the sixth nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 5 July 1957 and involved participants from Exercise Desert Rock VII, AFSWP, AFSWC, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect

  20. Shot PRISCILLA: a test of the PLUMBBOB series, 24 June 1957. Technical report

    Microsoft Academic Search

    M. J. Viscuso; S. Geller; M. Wilkinson; J. Striegel; B. Collins

    1981-01-01

    This report describes the activities of DOD personnel, both military and civilian, in Shot PRISCILLA, the 5th nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 24 June 1957 and involved participants from Exercise Desert Rock VII and VIII, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect

  1. Shot PRISCILLA: a test of the PLUMBBOB series, 24 June 1957. Technical report

    SciTech Connect

    Viscuso, M.J.; Geller, S.; Wilkinson, M.; Striegel, J.; Collins, B.

    1981-02-27

    This report describes the activities of DOD personnel, both military and civilian, in Shot PRISCILLA, the 5th nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 24 June 1957 and involved participants from Exercise Desert Rock VII and VIII, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at Shot PRISCILLA.

  2. Shot GALILEO, a test of the Plumbbob series, 2 september 1957. Technical report

    Microsoft Academic Search

    J. Ponton; M. Wilkinson; J. Striegel; B. Collins

    1981-01-01

    This report describes the activities of DOD personnel, both military and civilian, in Shot GALILEO, the 16th nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 2 September 1957 and involved participants from Exercise Desert Rock VIII, AFSWP, AFSWC, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect

  3. Shot GALILEO, a test of the Plumbbob series, 2 september 1957. Technical report

    SciTech Connect

    Ponton, J.; Wilkinson, M.; Striegel, J.; Collins, B.

    1981-02-27

    This report describes the activities of DOD personnel, both military and civilian, in Shot GALILEO, the 16th nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 2 September 1957 and involved participants from Exercise Desert Rock VIII, AFSWP, AFSWC, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at Shot GALILEO.

  4. Shots Diablo to Franklin Prime, the mid-series tests of the Plumbbob series, 15 July - 30 August 1957. Final report

    SciTech Connect

    Maag, C.; Ponton, J.

    1981-09-29

    This report describes the activities of DOD personnel, both military and civilian, in the eight mid-series shots of Operation PLUMBBOB, an atmospheric weapons testing series. The tests were conducted from 15 July 1957 through 30 August 1957 and involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and various AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at the mid-series PLUMBBOB shots.

  5. Series and parallel arc-fault circuit interrupter tests.

    SciTech Connect

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

    2013-07-01

    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.

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

    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...

  7. Testing and Assessment. Education Matters Series.

    ERIC Educational Resources Information Center

    Desforges, Charles

    Compulsory national testing for children at ages 7, 11, 14, and 16 years is part of the British National Curriculum. This development contributes to the fact that the issue of assessment is of increasing interest to parents, teachers, administrators, and employers. This book attempts to explain how assessment systems work and the uses that can be…

  8. 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

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

    1990-01-01

    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

  9. Time Series Tests of Endogenous Growth Models

    Microsoft Academic Search

    Charles I. Jones

    1995-01-01

    According to endogenous growth theory, permanent changes in certain policy variables have permanent effects on the rate of economic growth. Empirically, however, U.S. growth rates exhibit no large persistent changes. Therefore, the determinants of long-run growth highlighted by a specific growth model must similarly exhibit no large persistent changes or the persistent movement in these variables must be offsetting. Otherwise,

  10. A comparison of tests for positive term series 

    E-print Network

    Krohn, Stuart Anthony

    1977-01-01

    A COMPARISON OF TESTS FOR POSITIVE TERM SERIES A Thesis by STUART ANTHONY KROHN Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1977 Ma]or Sub...)cot: Mathematics A COMPARISON OF TESTS FOR POSITIVE TERM SERIES A Thesis by STUART ANTHONY KROHN Approved as to style and content by: (Chairman of Committee) (c' &Pi', :p~ (Head of Department) (M ber) (Member) August 1977 ABSTRACT A Comparison of Tests...

  11. Science Library of Test Items. Volume Nine. Mastery Testing Programme. [Mastery Tests Series 1.] Tests M1-M13.

    ERIC Educational Resources Information Center

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

    As part of a series of tests to measure mastery of specific skills in the natural sciences, copies of the first 13 tests are provided. Skills to be tested include: (1) reading a table; (2) using a biological key; (3) identifying chemical symbols; (4) identifying parts of a human body; (5) reading a line graph; (6) identifying electronic and…

  12. Running and testing of Josephson voltage standard series arrays

    SciTech Connect

    Gutmann, P.; Funck, T.; Grimm, L. [Physikalisch Technische Bundesanstalt, Braunschweig (Germany)

    1994-12-31

    It was found that the yield of the Josephson tunnel junction series arrays produced is limited by the test systems at present commonly in use to test and work them as voltage standards. We present a new voltage biasing system. It allows a junction-by-junction inspection of the array under test between zero and 10 volts with an excellent current resolution of 10{sup -7} A and an excellent voltage resolution of 10{sup -6}V.

  13. Iranian rainfall series analysis by means of nonparametric tests

    NASA Astrophysics Data System (ADS)

    Talaee, P. Hosseinzadeh

    2014-05-01

    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.

  14. 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

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

    1990-03-01

    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.

  15. Comparison of the MK test and EMD method for trend identification in hydrological time series

    NASA Astrophysics Data System (ADS)

    Sang, Yan-Fang; Wang, Zhonggen; Liu, Changming

    2014-03-01

    Trend identification is an important issue in hydrological time series analysis, but it is also a difficult task due to the diverse performances of methods. This paper mainly investigated the performances between the Mann-Kendall (MK) test and the empirical mode decomposition (EMD) method for trend identification of series. Analyses of both synthetic and observed series indicate the better performance of EMD compared with the other. The results show that pre-whitening cannot really improve trend identification when using the MK test, but cause wrong results sometimes. It can be due to the good correlation of trend, so pre-whitening would weaken trend's magnitude. If the trend of the analyzed series has small magnitude, it cannot be accurately identified by the MK test, because the trend would be submerged too severely by other components of series to accurately identify trend. When the analyzed series has short length, its trend cannot be accurately identified by the MK test. However, the EMD method can eliminate the influences of trends' magnitude and series' length, so it has more effective power for trend identification. As a result, it is suggested that series' trend can be directly identified by the MK test but need not do pre-whitening; moreover, the influences of trends' magnitude should be carefully considered for trend identification. Comparatively, the EMD method can adaptively determine the specific shape of the nonlinear and non-stationary trend of series by considering statistical significance, so it can be an effective alternative for trend identification of hydrological time series.

  16. Shot HOOD: a test of the PLUMBBOB series, 5 July 1957. Final report

    SciTech Connect

    Maag, C.; Wilkinson, M.; Striegel, J.; Collins, B.

    1981-02-27

    This report describes the activities of DoD personnel, both military and civilian, in Shot HOOD, the 6th nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 5 July 1957 and involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at Shot HOOD.

  17. Testing for Unit Roots in Seasonal Time Series

    Microsoft Academic Search

    D. A. Dickey; D. P. Hasza; W. A. Fuller

    1984-01-01

    Regression estimators of coefficients in seasonal autoregressive models are described. The percentiles of the distributions for time series that have unit roots at the seasonal lag are computed by Monte Carlo integration for finite samples and by analytic techniques and Monte Carlo integration for the limit case. The tabled distributions may be used to test the hypothesis that a time

  18. Science Library of Test Items. Volume Ten. Mastery Testing Programme. [Mastery Tests Series 2.] Tests M14-M26.

    ERIC Educational Resources Information Center

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

    As part of a series of tests to measure mastery of specific skills in the natural sciences, copies of tests 14 through 26 include: (14) calculating an average; (15) identifying parts of the scientific method; (16) reading a geological map; (17) identifying elements, mixtures and compounds; (18) using Ohm's law in calculation; (19) interpreting…

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

    ERIC Educational Resources Information Center

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

    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…

  20. Science Library of Test Items. Volume Thirteen. Mastery Testing Program. [Mastery Tests Series 5.] Tests M51-M65.

    ERIC Educational Resources Information Center

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

    As part of a series of tests to measure mastery of specific skills in the natural sciences, copies of tests 51 through 65 include: (51) interpreting atomic and mass numbers; (52) extrapolating from a geological map; (53) matching geological sections and maps; (54) identifying parts of the human eye; (55) identifying the functions of parts of a…

  1. Using Textbooks Effectively. TESOL Classroom Practice Series

    ERIC Educational Resources Information Center

    Savova, Lilia, Ed.

    2009-01-01

    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…

  2. Aplicabilidad del test BDS al análisis de series económicas\\/Aplicadility of las test to economic time series analysis

    Microsoft Academic Search

    M. MATILLA-GARCÍA; J. RODRÍGUEZ RUIZ

    2005-01-01

    El test BDS de Brock, Dechert y Scheinkman es un test asintótico que proporciona una herramienta no paramétrica para contrastar la hipótesis nula de series i.i.d., con potencia, en teoría, sobre todas las alternativas restantes (lineales o no lineales, estocásticas o deterministas). Una versión del BDS ha sido implementada en E-views, motivo por el que la herramienta está ganando difusión

  3. The NASA B-757 HIRF test series: Low power on-the-ground tests

    SciTech Connect

    Poggio, A.J.; Zacharias, R.A.; Pennock, S.T.; Avalle, C.A. [Lawrence Livermore National Lab., CA (United States); Carney, H. [NASA Langley Research Center, Hampton, VA (United States)

    1995-07-01

    The data acquisition phase of a program intended to provide data for the validation of computational, analytical and experimental for the assessment of electromagnetic effects i n 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 were LLNL, NASA Langley Research Center, Phillips Laboratory, and UIE, Inc. 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. A series of fly-by experiments were conducted in early 1995 in which the NASA B-757 was flown in the vicinity of a Voice of America station ({approximately}25 MHz), a fixed transmitter driving an LP array (172 MHz), and an ASRF radar at Wallops Island (430 MHz). In this paper, the overall test program is defined with particular attention to the on-the-ground portion. It is described in detail with presentation of the test rationale, test layout, and samples of the data. Samples of some inferences from the data that will be useful in protection engineering and EM effects mitigation will also be presented.

  4. Approaches to Language Testing. Advances in Language Testing Series: 2. Papers in Applied Linguistics.

    ERIC Educational Resources Information Center

    Spolsky, Bernard, Ed.

    This volume, one in a series on modern language testing, collects four essays dealing with current approaches to lanquage testing. The introduction traces the development of language testing theory and examines the role of linguistics in this area. "The Psycholinguistic Basis," by E. Ingram, discusses some interpretations of the term…

  5. Accelerated Life Tests for Weibull Series Systems With Masked Data

    Microsoft Academic Search

    Tsai-Hung Fan; Wan-Lun Wang

    2011-01-01

    This article introduces a -stage step-stress acceler- ated life test on system products, where each system contains -independent non-identical components connected in series, and it fails if any component has broken down. Due to cost considera- tions or environmental restrictions, masked causes of system fail- ures and type-I censored observations might occur in the collected data. The time to failure

  6. Design and testing of the Series III AMTEC cell

    SciTech Connect

    Mital, R.; Sievers, R.K.

    1999-07-01

    This paper describes the design and testing of the Series III (S3) Alkali Metal Thermal to Electric Converter (AMTEC) cell which is capable of high efficiency (15--25%) and high power density (100--150 W/kg). Compared to the Series 2 cell which is being developed primarily for space power systems, the Series III cell design provides a significantly higher beta{double_prime}-alumina solid electrolyte (BASE) tube packing density around the heat source thereby increasing cell power and minimizing heat loss. The prototype S3 cell will have 96 BASE tubes and is expected to produce about 150 We. In this cell design the BASE tube assemblies are mounted on a cylindrical tube support plate. The BASE tubes are arranged like spokes on a wheel. The inner cylinder, concentric to the tube support plate, is the hot side of the cell and the outer cylinder is the condenser. Since the prototype S3 cell will be the first of its kind, an engineering cell with same dimensions as the prototype but with 24 BASE tubes was built first. The purpose of this cell was to identify and resolve structural, thermal, manufacturing and sodium management issues before launching into the build of a complete 96 BASE tube cell. The engineering cell has been successfully built and tested. The data of the engineering cells have been used to calibrate the SINDA/FLUINT code to predict the prototype cell performance more accurately. The build of the prototype 96 BASE tube cells is now in progress. This paper presents the design and development of the prototype S3 cell. The fabrication and testing of the first S3 engineering cell is discussed next. Based on the test data of the engineering cell, the anticipated thermal performance of the prototype cells predicted by the calibrated SINDA model are also presented.

  7. Science Library of Test Items. Volume Sixteen. Mastery Testing Program. Series 6. Tests M66-M91.

    ERIC Educational Resources Information Center

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

    As part of a series of tests to measure mastery of specific skills in the natural sciences, print masters of tests 66 through 91 are provided. Among the areas covered are: carbon compounds; evolution; map reading; genetics; energy; chemical formulae; electricity; graphs; metric measures; solubility; and physical separations. Many tests contain…

  8. 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...

  9. Evaluation of LLTR Series II tests A-1A and A-1B test results. [Large Leak Test Rig

    SciTech Connect

    Shoopak, B F; Amos, J C; Norvell, T J

    1980-03-01

    The standard methodology, with minor modifications provides conservative yet realistic predictions of leaksite and other sodium system pressures in the LLTR Series II vessel and piping. The good agreement between predicted and measured pressures indicates that the TRANSWRAP/RELAP modeling developed from the Series I tests is applicable to larger scale units prototypical of the Clinch River steam generator design. Calculated sodium system pressures are sensitive to several modeling parameters including rupture disc modeling, acoustic velocity in the test vessel, and flow rate from the rupture tube. The acoustic velocity which produced best agreement with leaksite pressures was calculated based on the shroud diameter and shroud wall thickness. The corresponding rupture tube discharge coefficient was that of the standard design methodology developed from Series I testing. As found in Series I testing, the Series II data suggests that the leading edge of the flow in the relief line is two phase for a single, doubled-ended guillotine tube rupture. The steam generator shroud acts as if it is relatively transparent to the transmission of radial pressures to the vessel wall. Slightly lower sodium system maximum pressures measured during Test A-1b compared to Test A-1a are attributed to premature failure (failure at a lower pressure) of the rupture disc in contact with the sodium for test A-1b. The delay in failure of the second disc in Test A-1b, which was successfully modeled with TRANSWRAP, is attributed to the limited energy in the nitrogen injection.

  10. Absolute homogeneity test of Kelantan catchment precipitation series

    NASA Astrophysics Data System (ADS)

    Ros, Faizah Che; Tosaka, Hiroyuki; Sasaki, Kenji; Sidek, Lariyah Mohd; Basri, Hidayah

    2015-05-01

    Along the Kelantan River in north east of Malaysia Peninsular, there are several areas often damaged by flood during north-east monsoon season every year. It is vital to predict the expected behavior of precipitation and river runoff for reducing flood damages of the area under rapid urbanization and future planning. Nevertheless, the accuracy and reliability of any hydrological and climate studies vary based on the quality of the data used. The factors causing variations on these data are the method of gauging and data collection, stations environment, station relocation and the reliability of the measurement tool affect the homogenous precipitation records. Hence in this study, homogeneity of long precipitation data series is checked via the absolute homogeneity test consisting of four methods namely Pettitt test, standard normal homogeneity test (SNHT), Buishand range test and Von Neumann ratio test. For homogeneity test, the annual rainfall amount from the daily precipitation records at stations located in Kelantan operated by Department of Irrigation and Drainage Malaysia were considered in this study. The missing values were completed using the correlation and regression and inverse distance method. The data network consists of 103 precipitation gauging stations where 31 points are inactive, 6 gauging stations had missing precipitation values more than five years in a row and 16 stations have records less than twenty years. So total of 50 stations gauging stations were evaluated in this analysis. With the application of the mentioned methods and further graphical analysis, inhomogeneity was detected at 4 stations and 46 stations are found to be homogeneous.

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

    SciTech Connect

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

    1980-01-01

    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.

  12. The quantile spectral density and comparison based tests for nonlinear time series -Technical

    E-print Network

    Subba Rao, Suhasini

    The quantile spectral density and comparison based tests for nonlinear time series - Technical for nonlinear time series, which are motivated by the notion of serial dependence. The proposed tests are based of a time series, and is well defined under relatively weak mixing conditions. We propose an estimator

  13. A test for second order stationarity of a time series based on the Discrete Fourier Transform

    E-print Network

    Subba Rao, Suhasini

    A test for second order stationarity of a time series based on the Discrete Fourier Transform property, we construct a Portmanteau type test statistic for testing stationarity of the time series. It is shown that under the null of stationarity, the test statistic is approximately a chi square distribution

  14. Air-water tests in support of LLTR series II Test A-4. [Large Leak Test Rig

    SciTech Connect

    Chen, K.

    1980-07-01

    A series of tests injecting air into a tank of stagnant water was conducted in June 1980 utilizing the GE Plenum Mixing Test Facility in San Jose, California. The test was concerned with investigating the behavior of air jets at a submerged orifice in water over a wide range of flow rates. The main objective was to improve the basic understanding of gas-liquid phenomena (e.g., leak dynamics, gas bubble agglomeration, etc.) in a simulated tube bundle through visualization. The experimental results from these air-water tests will be used as a guide to help select the leak size for LLTR Series II Test A-4 because air-water system is a good simulation of water-sodium mixture.

  15. JPL Test Effectiveness Analysis

    NASA Technical Reports Server (NTRS)

    Shreck, Stephanie; Sharratt, Stephen; Smith, Joseph F.; Strong, Edward

    2008-01-01

    1) The pilot study provided meaningful conclusions that are generally consistent with the earlier Test Effectiveness work done between 1992 and 1994: a) Analysis of pre-launch problem/failure reports is consistent with earlier work. b) Analysis of post-launch early mission anomaly reports indicates that there are more software issues in newer missions, and the no-test category for identification of post-launch failures is more significant than in the earlier analysis. 2) Future work includes understanding how differences in Missions effect these analyses: a) There are large variations in the number of problem reports and issues that are documented by the different Projects/Missions. b) Some missions do not have any reported environmental test anomalies, even though environmental tests were performed. 3) Each project/mission has different standards and conventions for filling out the PFR forms, the industry may wish to address this issue: a) Existing problem reporting forms are to document and track problems, failures, and issues (etc.) for the projects, to ensure high quality. b) Existing problem reporting forms are not intended for data mining.

  16. Shots Wheeler to Morgan, the final eight tests of the Plumbbob series, 6 September - 7 October 1957. Final report

    SciTech Connect

    Massie, J.; Ponton, J.

    1981-09-30

    This report describes the activities of DOD personnel, both military and civilian, in Shots WHEELER to MORGAN, the final eight nuclear tests in the PLUMBBOB atmospheric weapons testing series. The tests were conducted between 6 September and 7 October 1957 and involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and various AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at Shots WHEELER to MORGAN.

  17. Multiple Regression Model Based Sequential Probability Ratio Test for Structural Change Detection of Time Series

    NASA Astrophysics Data System (ADS)

    Takeda, Katsunori; Hattori, Tetsuo; Kawano, Hiromichi

    In real time analysis and forecasting of time series data, it is important to detect the structural change as immediately, correctly, and simply as possible. And it is necessary for rebuilding the next prediction model after the change point as soon as possible. For this kind of time series data analysis, in general, multiple linear regression models are used. In this paper, we present two methods, i.e., Sequential Probability Ratio Test (SPRT) and Chow Test that is well-known in economics, and describe those experimental evaluations of the effectiveness in the change detection using the multiple regression models. Moreover, we extend the definition of the detected change point in the SPRT method, and show the improvement of the change detection accuracy.

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

    Microsoft Academic Search

    J. F. Hauer; W. A. Mittelstadt; R. J. Piwko; B. L. Damsky; J. D. Eden

    1996-01-01

    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 offline, show that the TCSC can be a

  19. ACER Tests of Basic Skills: Aspects of Literacy, Aspects of Numeracy. Teacher's Manual. Green Series 6.

    ERIC Educational Resources Information Center

    Lokan, Jan; And Others

    Developed for the Basic Skills Testing Program (BSTP) in New South Wales, Australia, this teacher's manual describes the Green Series 6 of the ACER (Australian Council for Educational Research) Tests of Basic Skills. The two tests in this series, Aspects of Literacy and Aspects of Numeracy, were administered statewide by government school…

  20. PX series AMTEC cell design, testing and analysis

    SciTech Connect

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

    1997-12-31

    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.

  1. General-Purpose Heat Source Development: Safety Verification Test Program. Flyer plate test series

    SciTech Connect

    Cull, T.A.; Pavone, D.

    1986-09-01

    The General-Purpose Heat Source (GPHS) is a modular component of a radioisotope thermoelectric generator (RTG) that will provide electric power for space missions. The initial RTG applications will be for the NASA Galileo and the ESA Ulysses missions. Each of the 18 GPHS modules in an RTG contains four /sup 238/PuO/sub 2/-fueled clads and generates 250 W/sub (t)/. A series of Safety Verification Tests (SVTs) has been conducted to assess the ability of the GPHS fueled clads to contain the plutonia in accident environments. Because a launch pad or postlaunch explosion of the Space Transportation System Vehicle (space shuttle) is one conceivable accident, the SVT plan included a series of tests to simulate the fragment environment that the RTG and GPHS modules would experience in such an event. These tests deal specifically with the flat-on collision of flyer-plate-type fragments with bare, simulant-fueled (depleted UO/sub 2/) clads. Results of these tests suggest that the fueled clad is only minimally breached by collision with 3.53-mm-thick flyer-plate-type fragments of space shuttle alloy at velocities up to 1170 m/s. However, collision of a 38.1-mm-thick plate with a bare GPHS clad, at a velocity of 270 m/s, results in a total release of fuel.

  2. Shot HOOD: a test of the PLUMBBOB series, revised. Technical report

    SciTech Connect

    Maag, C.; Wilkinson, M.; Striegel, J.; Collins, B.

    1983-05-13

    This report describes the activities of DoD personnel, both military and civilian, in Shot HOOD, the sixth nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 5 July 1957 and involved participants from Exercise Desert Rock VII, AFSWP, AFSWC, and AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at Shot HOOD. At the time of the first edition of SHOT HOOD, the after-action report describing the Marine brigade exercise (Provisional Atomic Exercise Brigade, Report of Exercise Desert Rock VII, Marine Corps) had not been located. For this edition, the after-action report has been used to corroborate, to correct, and to supplement accounts of the troop exercise drawn from planning documents and interviews. This has resulted in substantial revision of section 2.2.

  3. The Compensation Committee. AGB Effective Committee Series

    ERIC Educational Resources Information Center

    Hyatt, Thomas K.

    2013-01-01

    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…

  4. The Facilities Committee. AGB Effective Committee Series

    ERIC Educational Resources Information Center

    Kaiser, Harvey H.

    2012-01-01

    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…

  5. The Executive Committee. AGB Effective Committee Series

    ERIC Educational Resources Information Center

    Legon, Richard D.

    2012-01-01

    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…

  6. Misuse study of latch attachment: a series of frontal sled tests.

    PubMed

    Menon, Rajiv; Ghati, Yoganand

    2007-01-01

    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

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

    SciTech Connect

    Cull, T.A.

    1989-06-01

    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.

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

    SciTech Connect

    Cull, T.A.

    1989-08-01

    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.

  9. Time series simulations of wideband spectra for fatigue tests of offshore structures

    SciTech Connect

    Lin, N.K.; Hartt, W.H.

    1984-12-01

    A time-series simulation method, based on the principle of time series modeling for dynamic systems, is used to reporduce a wide-band stress history from a prescribed stress spectral model for fatigue testing of offshore structures. The optimization procedures and stability of the time series model for the prescribed spectrum are presented and discussed. The optimization procedures are developed on the basis of the Levison-Durbin algorithm, which usually produces a stable time series model if the order of the time series model is even. An example is presented to demonstrate the applicability of the proposed method to long-time, high-cycle fatigue testing.

  10. Explosion overpressure test series: General-Purpose Heat Source development: Safety Verification Test program

    SciTech Connect

    Cull, T.A.; George, T.G.; Pavone, D.

    1986-09-01

    The General-Purpose Heat Source (GPHS) is a modular, radioisotope heat source that will be used in radioisotope thermoelectric generators (RTGs) to supply electric power for space missions. The first two uses will be the NASA Galileo and the ESA Ulysses missions. The RTG for these missions will contain 18 GPHS modules, each of which contains four /sup 238/PuO/sub 2/-fueled clads and generates 250 W/sub (t)/. A series of Safety Verification Tests (SVTs) was conducted to assess the ability of the GPHS modules to contain the plutonia in accident environments. Because a launch pad or postlaunch explosion of the Space Transportation System vehicle (space shuttle) is a conceivable accident, the SVT plan included a series of tests that simulated the overpressure exposure the RTG and GPHS modules could experience in such an event. Results of these tests, in which we used depleted UO/sub 2/ as a fuel simulant, suggest that exposure to overpressures as high as 15.2 MPa (2200 psi), without subsequent impact, does not result in a release of fuel.

  11. Shots Boltzmann to Wilson, the first four tests of the Plumbbob series, 28 May - 18 June 1957. Final report

    SciTech Connect

    West, J.; Wilkinson, M.; Simpson, C.; Massie, J.

    1981-09-28

    This report describes the activities of DOD personnel, both military and civilian, in Shots BOLTZMANN to WILSON, the first four nuclear tests in the PLUMBBOB Series, which were conducted from 28 May to 18 June 1957. The tests involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and various AEC test groups. This volume also describes the radiological safety criteria and procedures in effect at Shots BOLTZMANN to WILSON.

  12. 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...

  13. Teaching English as a Second Language: Perspectives and Practices. A Series of Six Texts. Testing: Fourth of a Series.

    ERIC Educational Resources Information Center

    New York State Education Dept., Albany.

    This book is designed to assist those who work with non-English dominant students by providing resource information relevant to second language teaching and learning. The articles in the series encompass both theory and practical learning techniques in six general topics. Five articles concerning testing are presented in the fourth volume of this…

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

    SciTech Connect

    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

    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.

  15. Current Developments in Language Testing. Anthology Series 25.

    ERIC Educational Resources Information Center

    Anivan, Sarinee, Ed.

    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…

  16. Can Teachers Be Evaluated by Their Students' Test Scores? Should They Be? The Use of Value-Added Measures of Teacher Effectiveness in Policy and Practice. Education Policy for Action Series

    ERIC Educational Resources Information Center

    Corcoran, Sean P.

    2010-01-01

    Value-added measures of teacher effectiveness are the centerpiece of a national movement to evaluate, promote, compensate, and dismiss teachers based in part on their students' test results. Federal, state, and local policy-makers have adopted these methods en masse in recent years in an attempt to objectively quantify teaching effectiveness and…

  17. Shot HOOD: a test of the PLUMBBOB series, 5 July 1957. Final report

    Microsoft Academic Search

    C. Maag; M. Wilkinson; J. Striegel; B. Collins

    1981-01-01

    This report describes the activities of DoD personnel, both military and civilian, in Shot HOOD, the 6th nuclear test in the PLUMBBOB atmospheric weapons testing series. The test was conducted on 5 July 1957 and involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and AEC test groups. This volume also describes the radiological safety criteria and procedures

  18. General-purpose heat source development: Safety Verification Test Program. Titanium bullet/fragment test series

    SciTech Connect

    George, T.G.

    1986-06-01

    The radioisotope thermoelectric generator (RTG) that will provide power for the Galileo and Ulysses space missions contains 18 General-Purpose Heat Source (GPHS) modules. Each module contains four /sup 238/PuO/sub 2/-fueled clads and generates 250 W(t). Because the possibility of launch-pad or postlaunch explosion exists and because any explosion would generate a field of high-energy fragments, the fueled clads within each GPHS module must be able to survive fragment impact. In this test series we investigated the response of bare, simulant-fueled (UO/sub 2/) clads to the impact of high-energy titanium alloy fragments. We determined that 425m/s is the threshold impact velocity of a 3.25-g titanium bullet that will cause direct mechanical failure of a bare fueled clad. 40 figs.

  19. Using corrosion tests effectively

    Microsoft Academic Search

    1987-01-01

    Just how useful are corrosion test methods in determining reasonable estimates of equipment service life. Today there is a wide selection of corrosion tests which can make it difficult to compare results. It requires an intelligent interpretation to know when the results are meaningful. Misinterpretation could cause unscheduled corrosion failures resulting in production shutdowns, associated financial losses, hazards to personnel

  20. The effect of trapped charge on series capacitors

    NASA Astrophysics Data System (ADS)

    James, Mark C.; Solheim, Jonathan R.

    2015-07-01

    If capacitors are initially charged before placing them in series, charge becomes trapped on the electrically isolated internal plates. The effect of this "trapped charge" on the final charge and voltage distributions in series capacitor networks provides instructors with a new class of engaging capacitor problems not currently addressed in introductory physics textbooks. We present formulae for the final charges on two series capacitors connected to a battery in terms of initial charge values. Various special cases are also considered. Results are verified experimentally using dc voltage and RC time constant measurements. Practical considerations for experimental design are discussed.

  1. Testing the homogeneity of short-term surface solar radiation series in Europe

    NASA Astrophysics Data System (ADS)

    Hakuba, Maria Z.; Sanchez-Lorenzo, Arturo; Folini, Doris; Wild, Martin

    2013-05-01

    Non-climatic factors, such as changes in instruments or the relocation of meteorological stations, can cause sudden shifts or gradual biases in a climate data time series. The use of such inhomogeneous time series in data analysis might lead to false conclusions about climate variability and change. In this work, we test the homogeneity of 172 surface solar radiation (SSR) monthly series over Europe available in the Global Energy Balance Archive (GEBA) during the period 2000-2007. Four absolute homogeneity tests are applied to each series, and a classification of inhomogeneous and homogeneous stations is given. The results show that 20 out of 172 series (11.6% of the total) are inhomogeneous at the 99% significance level. The mean average time series of both data sets, the original and the one with only the homogeneous series, show positive linear trends (0.59 and 0.70 Wm-2yr-1). The omission of the inhomogeneous series increases the original trend by 0.11 Wm-2yr-1 or 1.1 Wm-2decade-1. Our results highlight the importance of testing the homogeneity of SSR time series before any trend analysis is performed.

  2. Shots Diablo to Franklin Prime, the mid-series tests of the Plumbbob series, 15 July - 30 August 1957. Final report

    Microsoft Academic Search

    C. Maag; J. Ponton

    1981-01-01

    This report describes the activities of DOD personnel, both military and civilian, in the eight mid-series shots of Operation PLUMBBOB, an atmospheric weapons testing series. The tests were conducted from 15 July 1957 through 30 August 1957 and involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and various AEC test groups. This volume also describes the radiological

  3. Time Series Analysis of Alternative Media Effects Theories.

    ERIC Educational Resources Information Center

    Watt, James H., Jr.; van den Berg, Sjef A.

    A study was conducted in the Washington, D.C., area to test mass media effects in a community controversy. Five possible theories were hypothesized to explain the effects media have on a community: indirect and direct effects, null effects, agenda setting, reverse effects, and reverse agenda setting. During the 16-month test period of the British…

  4. Real-time tracking and targeting computations and rocket vehicle aeroballistics for the PLACES ionospheric plasma test series

    NASA Astrophysics Data System (ADS)

    Rollstin, L. R.

    The PLACES (Position Location And Communication Effects Simulations) test program, conducted in December 1980 at Eglin Gulf Test Range, involved a series of ionospheric releases of barium/barium-nitrate vapor. The Defense Nuclear Agency sponsored program investigated effects of a structured ionospheric plasma (similar to that produced by a high-altitude nuclear explosion) on satellite navigation systems and provided in situ measurement of plasma structure. Terrier-Tomahawk rocket systems boosted the barium payloads, beacon payloads (plasma occultation experiment), and probe payloads (plasma in situ measurement). Drifting plasma tracking procedures, beacon- and probe-vehicle targeting procedures, and vehicle flight test results are presented.

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

    ERIC Educational Resources Information Center

    Nicolich, Mark J.; Weinstein, Carol S.

    1981-01-01

    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)

  6. Design and evaluation of a 3 million DN series-hybrid thrust bearing. [stability tests and fatigue tests

    NASA Technical Reports Server (NTRS)

    Scibbe, H. W.; Winn, L. W.; Eusepi, M.

    1976-01-01

    The bearing, consisting of a 150-mm ball bearing and a centrifugally actuated, conical, fluid-film bearing, was fatigue tested. Test conditions were representative of a mainshaft ball bearing in a gas turbine engine operating at maximum thrust load to simulate aircraft takeoff conditions. Tests were conducted up to 16000 rpm and at this speed an axial load of 15568 newtons (3500 lb) was safely supported by the hybrid bearing system. Through the series-hybrid bearing principle, the effective ball bearing speed was reduced to approximately one-half of the shaft speed. It was concluded that a speed reduction of this magnitude results in a ten-fold increase in the ball bearing fatigue life. A successful evaluation of fluid-film bearing lubricant supply failure was performed repeatedly at an operating speed of 10,000 rpm. A complete and smooth changeover to full-scale ball bearing operation was effected when the oil supply to the fluid-film bearing was cut off. Reactivation of the fluid-film oil supply system resulted in a flawless return to the original mode of hybrid operation.

  7. THE FINAL SERIES OF OILS TESTED AS A POTENTIAL SOLUTION TO THE GALVESTON FERRY

    E-print Network

    Texas at Austin, University of

    conditions that promote oil consumption: low speed and low load. The tests performed at UT were essential0-5532-P3 THE FINAL SERIES OF OILS TESTED AS A POTENTIAL SOLUTION TO THE GALVESTON FERRY OPERATIONS, and recommend solutions. The research team conducted two rounds of tests of engine oils as a potential solution

  8. Statistical test for dynamical nonstationarity in observed time-series data Matthew B. Kennel*

    E-print Network

    Tennessee, University of

    Statistical test for dynamical nonstationarity in observed time-series data Matthew B. Kennel observed data yields a test for ``nonstationarity.'' Framed in terms of a statistical hypothesis test, with corrections to overcome difficulties in real dynamical data which cause naive statistics to fail. S1063-651X

  9. Test de causalite indirecte entre deux series extraites d'un modele vectoriel autoregressif stationnaire

    Microsoft Academic Search

    C. Bruneau

    1996-01-01

    Nous proposons une procedure de test pour analyser les liens de causalite indirects entre des series chronologiques extraites d'un systeme multivarie dont la dynamique est caracterise par un model vectoriel autoregressif stationnaire d'ordre fini.

  10. Can Teachers Be Evaluated by Their Students' Test Scores? Should They Be? The Use of Value-Added Measures of Teacher Effectiveness in Policy and Practice. Executive Summary. Education Policy for Action Series

    ERIC Educational Resources Information Center

    Corcoran, Sean P.

    2010-01-01

    "Value-added" measures of teacher effectiveness are the centerpiece of a national movement to evaluate, promote, compensate, and dismiss teachers based in part on their students' test results. Federal, state, and local policy-makers have embraced these measures in recent years as a means to objectively quantify teacher quality and to identify,…

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

    SciTech Connect

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

    1981-11-24

    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.

  12. Advancing Toward Test Automation through Effective Manual Testing

    E-print Network

    Advancing Toward Test Automation through Effective Manual Testing May 2005 Advancing Toward Test Automation through Effective Manual Testing Bob Levy, Lead Product Manager ­ Functional Test Dennis Elenburg, IT Specialist ­ Rational Products #12;Advancing Toward Test Automation through Effective Manual Testing Page 2

  13. PX series AMTEC cell design, testing, and analysis

    Microsoft Academic Search

    C. A. Borkowski; R. K. Sievers; T. J. Hendricks

    1997-01-01

    PX (Pluto Express) cell testing and analysis has shown that AMTEC (alkali metal thermoelectric conversion) cells can reach the power levels required by the 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

  14. The Effects of Physical Attractiveness and Anxiety on Heterosexual Attraction Over a Series of Five Encounters

    ERIC Educational Resources Information Center

    Mathes, Eugene W.

    1975-01-01

    The "information availability model" of heterosexual attraction was tested by having subjects go on a series of five encounters. It was found that both physical attractiveness and the personality variable, anxiety, had early and continuous effects on liking. It was concluded the model is an inadequate explanation of heterosexual attraction.…

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

    NASA Technical Reports Server (NTRS)

    Scheick, Leif

    2014-01-01

    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.

  16. Reliability Analysis for the Internationally Administered 2002 Series GED Tests. GED Testing Service[R] Research Studies, 2009-3

    ERIC Educational Resources Information Center

    Setzer, J. Carl; He, Yi

    2009-01-01

    Reliability Analysis for the Internationally Administered 2002 Series GED (General Educational Development) Tests Reliability refers to the consistency, or stability, of test scores when the authors administer the measurement procedure repeatedly to groups of examinees (American Educational Research Association [AERA], American Psychological…

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

    Microsoft Academic Search

    P. C. Ferrell; D. A. Moody

    1995-01-01

    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).

  18. Radioisotope Thermoelectric Generator Transportation System licensed hardware second certification test series and package shock mount system test

    Microsoft Academic Search

    Patrick C. Ferrell; Donald A. Moody

    1996-01-01

    This paper presents a summary of two separate drop test activities that were 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, CodeofFederalRegulations, ‘‘Part 71’’ (10 CFR 71). Results of

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

    SciTech Connect

    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

    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.

  20. Perseus B Taxi Tests in Preparation for a New Series of Flight Tests

    NASA Technical Reports Server (NTRS)

    1998-01-01

    The Perseus B remotely piloted aircraft taxis on the runway at Edwards Air Force Base, California, before a series of development flights at NASA's Dryden flight Research Center. The Perseus B is the latest of three versions of the Perseus design developed by Aurora Flight Sciences under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program. Perseus B is a remotely piloted aircraft developed as a design-performance testbed under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) project. Perseus is one of several flight vehicles involved in the ERAST project. A piston engine, propeller-powered aircraft, Perseus was designed and built by Aurora Flight Sciences Corporation, Manassas, Virginia. The objectives of Perseus B's ERAST flight tests have been to reach and maintain horizontal flight above altitudes of 60,000 feet and demonstrate the capability to fly missions lasting from 8 to 24 hours, depending on payload and altitude requirements. The Perseus B aircraft established an unofficial altitude record for a single-engine, propeller-driven, remotely piloted aircraft on June 27, 1998. It reached an altitude of 60,280 feet. In 1999, several modifications were made to the Perseus aircraft including engine, avionics, and flight-control-system improvements. These improvements were evaluated in a series of operational readiness and test missions at the Dryden Flight Research Center, Edwards, California. Perseus is a high-wing monoplane with a conventional tail design. Its narrow, straight, high-aspect-ratio wing is mounted atop the fuselage. The aircraft is pusher-designed with the propeller mounted in the rear. This design allows for interchangeable scientific-instrument payloads to be placed in the forward fuselage. The design also allows for unobstructed airflow to the sensors and other devices mounted in the payload compartment. The Perseus B that underwent test and development in 1999 was the third generation of the Perseus design, which began with the Perseus Proof-Of-Concept aircraft. Perseus was initially developed as part of NASA's Small High-Altitude Science Aircraft (SHASA) program, which later evolved into the ERAST project. The Perseus Proof-Of-Concept aircraft first flew in November 1991 and made three low-altitude flights within a month to validate the Perseus aerodynamic model and flight control systems. Next came the redesigned Perseus A, which incorporated a closed-cycle combustion system that mixed oxygen carried aboard the aircraft with engine exhaust to compensate for the thin air at high altitudes. The Perseus A was towed into the air by a ground vehicle and its engine started after it became airborne. Prior to landing, the engine was stopped, the propeller locked in horizontal position, and the Perseus A glided to a landing on its unique bicycle-type landing gear. Two Perseus A aircraft were built and made 21 flights in 1993-1994. One of the Perseus A aircraft reached over 50,000 feet in altitude on its third test flight. Although one of the Perseus A aircraft was destroyed in a crash after a vertical gyroscope failed in flight, the other aircraft completed its test program and remains on display at Aurora's facility in Manassas. Perseus B first flew Oct. 7, 1994, and made two flights in 1996 before being damaged in a hard landing on the dry lakebed after a propeller shaft failure. After a number of improvements and upgrades-including extending the original 58.5-foot wingspan to 71.5 feet to enhance high-altitude performance--the Perseus B returned to Dryden in the spring of 1998 for a series of four flights. Thereafter, a series of modifications were made including external fuel pods on the wing that more than doubled the fuel capacity to 100 gallons. Engine power was increased by more than 20 percent by boosting the turbocharger output. Fuel consumption was reduced with fuel control modifications and a leaner fuel-air mixture that did not compromise power. The aircraft again crashed on Oct. 1, 1999, near Barstow, California, suffering moderate damage to the air

  1. What Test Oracle Should I Use for Effective GUI Testing?

    Microsoft Academic Search

    Atif M. Memon; Ishan Banerjee; Adithya Nagarajan

    2003-01-01

    Test designers widely believe that the overall effective- ness and cost of software testing depends largely on the type and number of test cases executed on the software. In this paper we show that the test oracle used during test- ing also contributes significantly to test effectiveness and cost. A test oracle is a mechanism that determines whether a software

  2. Pressure measurements in a hydrogen combustion environment: hydrogen-air combustion test series 1 and 2 in the FITS tank. Volume 1

    Microsoft Academic Search

    Roller

    1985-01-01

    Test series 1 and 2 examined the effects of a number of parameters on hydrogen-air combustion: the initial temperature and pressure of the gases, the effect of added steam or carbon dioxide as diluents, and the percent hydrogen in air. For tests in the range of 20% to 40% hydrogen in air, recorded peak pressures were equal to adiabatic, isochoric,

  3. Testing Homeopathy in Mouse Emotional Response Models: Pooled Data Analysis of Two Series of Studies

    PubMed Central

    Bellavite, Paolo; Conforti, Anita; Marzotto, Marta; Magnani, Paolo; Cristofoletti, Mirko; Olioso, Debora; Zanolin, Maria Elisabetta

    2012-01-01

    Two previous investigations were performed to assess the activity of Gelsemium sempervirens (Gelsemium s.) in mice, using emotional response models. These two series are pooled and analysed here. Gelsemium s. in various homeopathic centesimal dilutions/dynamizations (4C, 5C, 7C, 9C, and 30C), a placebo (solvent vehicle), and the reference drugs diazepam (1?mg/kg body weight) or buspirone (5?mg/kg body weight) were delivered intraperitoneally to groups of albino CD1 mice, and their effects on animal behaviour were assessed by the light-dark (LD) choice test and the open-field (OF) exploration test. Up to 14 separate replications were carried out in fully blind and randomised conditions. Pooled analysis demonstrated highly significant effects of Gelsemium s. 5C, 7C, and 30C on the OF parameter “time spent in central area” and of Gelsemium s. 5C, 9C, and 30C on the LD parameters “time spent in lit area” and “number of light-dark transitions,” without any sedative action or adverse effects on locomotion. This pooled data analysis confirms and reinforces the evidence that Gelsemium s. regulates emotional responses and behaviour of laboratory mice in a nonlinear fashion with dilution/dynamization. PMID:22548123

  4. Testing homeopathy in mouse emotional response models: pooled data analysis of two series of studies.

    PubMed

    Bellavite, Paolo; Conforti, Anita; Marzotto, Marta; Magnani, Paolo; Cristofoletti, Mirko; Olioso, Debora; Zanolin, Maria Elisabetta

    2012-01-01

    Two previous investigations were performed to assess the activity of Gelsemium sempervirens (Gelsemium s.) in mice, using emotional response models. These two series are pooled and analysed here. Gelsemium s. in various homeopathic centesimal dilutions/dynamizations (4C, 5C, 7C, 9C, and 30C), a placebo (solvent vehicle), and the reference drugs diazepam (1?mg/kg body weight) or buspirone (5?mg/kg body weight) were delivered intraperitoneally to groups of albino CD1 mice, and their effects on animal behaviour were assessed by the light-dark (LD) choice test and the open-field (OF) exploration test. Up to 14 separate replications were carried out in fully blind and randomised conditions. Pooled analysis demonstrated highly significant effects of Gelsemium s. 5C, 7C, and 30C on the OF parameter "time spent in central area" and of Gelsemium s. 5C, 9C, and 30C on the LD parameters "time spent in lit area" and "number of light-dark transitions," without any sedative action or adverse effects on locomotion. This pooled data analysis confirms and reinforces the evidence that Gelsemium s. regulates emotional responses and behaviour of laboratory mice in a nonlinear fashion with dilution/dynamization. PMID:22548123

  5. The power of tests for weak stationary time series in finite samples: An empirical investigation

    NASA Astrophysics Data System (ADS)

    Luo, Xiaoguang; Mayer, Michael; Heck, Bernhard

    2010-05-01

    Whether or not a time series is weakly stationary has long been a question of major interest in the field of time series analysis related to different scientific disciplines. A time series is considered as weakly stationary if the associated mean and covariance function do not vary with respect to time. That is to say, the original time series has statistical properties similar to those of the 'time-shifted' series. Weak stationary time series can be sufficiently modelled, e.g. by means of so-called autoregressive moving average (ARMA) processes. In the case of non-stationary time series appropriate detrending procedures have to be performed prior to the analysis in order to transform the data to weakly stationary form. According to the properties that weakly stationary processes exhibit homogenous variances, statistical inferences for weak stationarity can be carried out using variance homogeneity tests (e.g. two-sample ?-test, multiple-sample Bartlett test). In addition, regarding a time series as an autoregressive (AR) process, the weak stationarity can be assessed by revising the existence of unit roots of the associated characteristic equation of the AR process. In the presence of unit roots, the analysed data are considered as non-stationary. The most famous autoregressive unit root tests are the augmented Dickey-Fuller test, the Phillips-Perron test, and the Kwiatkowski-Phillips-Schmidt-Shin (KPSS) test. In this paper the power of stationarity tests is empirically investigated using a large amount of representative data simulated by means of autoregressive (integrated) moving average (AR(I)MA) processes. The test results are analysed based on statistical measures characterising the performance of a binary classification test, e.g. specificity (proportion of correctly identified null hypothesis) and sensitivity (proportion of correctly identified alternative hypothesis). The statistical analysis illustrates that the sensitivity of all investigated stationarity tests increases with increasing sample sizes. In comparison with the employed homogeneity tests whose specificity decreases with growing data volume, the specificity of the applied unit root tests remains at a high and constant level which corresponds very well to the specified probability of type I error ?.

  6. General-Purpose Heat Source Safety Verification Test series: SVT-7 through SVT-10

    SciTech Connect

    George, T.G.; Pavone, D.

    1985-09-01

    The General-Purpose Heat Source (GPHS) is a modular component of the radioisotope thermoelectric generator that will supply power for the Galileo and Ulysses (formerly ISPM) space missions. The GPHS provides power by transmitting the heat of /sup 238/PuO/sub 2/ ..cap alpha..-decay to an array of thermoelectric elements. Because the possibility of an orbital abort always exists, the heat source was designed and constructed to minimize plutonia release in any accident environment. The Safety Verification Test (SVT) series was formulated to evaluate the effectiveness of GPHS plutonia containment after atmospheric reentry and Earth impact. The first report (covering SVT-1 through SVT-6) described the results of flat and side-on module impacts. This report describes module impacts at angles of 15/sup 0/ and 30/sup 0/.

  7. General-purpose heat source safety verification test series: SVT-11 through SVT-13

    SciTech Connect

    George, T.G.; Pavone, D.

    1986-05-01

    The General-Purpose Heat Source (GPHS) is a modular component of the radioisotope thermoelectric generator that will provide power for the Galileo and Ulysses (formerly ISPM) space missions. The GPHS provides power by transmitting the heat of /sup 238/Pu ..cap alpha..-decay to an array of thermoelectric elements. Because the possibility of an orbital abort always exists, the heat source was designed and constructed to minimize plutonia release in any accident environment. The Safety Verification Test (SVT) series was formulated to evaluate the effectiveness of GPHS plutonia containment after atmospheric reentry and Earth impact. The first two reports (covering SVT-1 through SVT-10) described the results of flat, side-on, and angular module impacts against steel targets at 54 m/s. This report describes flat-on module impacts against concrete and granite targets, at velocities equivalent to or higher than previous SVTs.

  8. Perseus B Taxi Tests in Preparation for a New Series of Flight Tests

    NASA Technical Reports Server (NTRS)

    1998-01-01

    The Perseus B remotely piloted aircraft on the runway at Edwards Air Force Base, California at the conclusion of a development flight at NASA's Dryden flight Research Center. The Perseus B is the latest of three versions of the Perseus design developed by Aurora Flight Sciences under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program. Perseus B is a remotely piloted aircraft developed as a design-performance testbed under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) project. Perseus is one of several flight vehicles involved in the ERAST project. A piston engine, propeller-powered aircraft, Perseus was designed and built by Aurora Flight Sciences Corporation, Manassas, Virginia. The objectives of Perseus B's ERAST flight tests have been to reach and maintain horizontal flight above altitudes of 60,000 feet and demonstrate the capability to fly missions lasting from 8 to 24 hours, depending on payload and altitude requirements. The Perseus B aircraft established an unofficial altitude record for a single-engine, propeller-driven, remotely piloted aircraft on June 27, 1998. It reached an altitude of 60,280 feet. In 1999, several modifications were made to the Perseus aircraft including engine, avionics, and flight-control-system improvements. These improvements were evaluated in a series of operational readiness and test missions at the Dryden Flight Research Center, Edwards, California. Perseus is a high-wing monoplane with a conventional tail design. Its narrow, straight, high-aspect-ratio wing is mounted atop the fuselage. The aircraft is pusher-designed with the propeller mounted in the rear. This design allows for interchangeable scientific-instrument payloads to be placed in the forward fuselage. The design also allows for unobstructed airflow to the sensors and other devices mounted in the payload compartment. The Perseus B that underwent test and development in 1999 was the third generation of the Perseus design, which began with the Perseus Proof-Of-Concept aircraft. Perseus was initially developed as part of NASA's Small High-Altitude Science Aircraft (SHASA) program, which later evolved into the ERAST project. The Perseus Proof-Of-Concept aircraft first flew in November 1991 and made three low-altitude flights within a month to validate the Perseus aerodynamic model and flight control systems. Next came the redesigned Perseus A, which incorporated a closed-cycle combustion system that mixed oxygen carried aboard the aircraft with engine exhaust to compensate for the thin air at high altitudes. The Perseus A was towed into the air by a ground vehicle and its engine started after it became airborne. Prior to landing, the engine was stopped, the propeller locked in horizontal position, and the Perseus A glided to a landing on its unique bicycle-type landing gear. Two Perseus A aircraft were built and made 21 flights in 1993-1994. One of the Perseus A aircraft reached over 50,000 feet in altitude on its third test flight. Although one of the Perseus A aircraft was destroyed in a crash after a vertical gyroscope failed in flight, the other aircraft completed its test program and remains on display at Aurora's facility in Manassas. Perseus B first flew Oct. 7, 1994, and made two flights in 1996 before being damaged in a hard landing on the dry lakebed after a propeller shaft failure. After a number of improvements and upgrades-including extending the original 58.5-foot wingspan to 71.5 feet to enhance high-altitude performance--the Perseus B returned to Dryden in the spring of 1998 for a series of four flights. Thereafter, a series of modifications were made including external fuel pods on the wing that more than doubled the fuel capacity to 100 gallons. Engine power was increased by more than 20 percent by boosting the turbocharger output. Fuel consumption was reduced with fuel control modifications and a leaner fuel-air mixture that did not compromise power. The aircraft again crashed on Oct. 1, 1999, near Barstow, California, suffering moderate damage to the aircraf

  9. Analysis of Complex Intervention Effects in Time-Series Experiments.

    ERIC Educational Resources Information Center

    Bower, Cathleen

    An iterative least squares procedure for analyzing the effect of various kinds of intervention in time-series data is described. There are numerous applications of this design in economics, education, and psychology, although until recently, no appropriate analysis techniques had been developed to deal with the model adequately. This paper…

  10. Shot Smoky, a test of the Plumbbob series, 31 August 1957. Technical report

    Microsoft Academic Search

    P. S. Harris; C. Lowery; A. G. Nelson; s. Obermiller; W. J. Ozeroff

    1981-01-01

    This report describes the activities of DOD participants in the atmospheric nuclear test, SMOKY, conducted on 31 August 1957 as part of the PLUMBBOB series. The various levels at which DOD personnel participated within the Nevada Test Organization and Desert Rock projects are described. Those projects related to DOD mission activities are described as to purpose, agency, results, operation, and

  11. Shot Smoky, a test of the Plumbbob series, 31 August 1957. Technical report

    SciTech Connect

    Harris, P.S.; Lowery, C.; Nelson, A.G.; Obermiller, s.; Ozeroff, W.J.

    1981-05-31

    This report describes the activities of DOD participants in the atmospheric nuclear test, SMOKY, conducted on 31 August 1957 as part of the PLUMBBOB series. The various levels at which DOD personnel participated within the Nevada Test Organization and Desert Rock projects are described. Those projects related to DOD mission activities are described as to purpose, agency, results, operation, and radiological safety aspects.

  12. Honeywell STS2000 and Aerospatiale ATEC Series 6 new generation of avionics test systems

    Microsoft Academic Search

    M. Linton; P. Charbonnier

    1993-01-01

    This paper presents the successful joint development by Honeywell and Aerospatiale of their new generation of avionics test systems. The Honeywell STS2000 and the Aerospatiale ATEC Series 6 are VXI-based ATEs providing all the resources and technologies needed to test the new avionics of the Boeing 777 and the Airbus A330\\/A340

  13. Testing for efficiency and non-linearity in market and natural time series

    Microsoft Academic Search

    Teo Jaši?; Douglas Wood

    2006-01-01

    Time series in traded markets such as currencies and securities involve supply\\/demand interaction, so they might be expected to contain distinctive and identifiable structures in comparison with data based on natural phenomena such as river flows or sunspots. This paper tests this proposition using standard econometric tests including variance ratios, modified rescaled range (R\\/S) ratios and BDS statistics together with

  14. A test for second order stationarity of a time series based on the Discrete Fourier Transform -Technical report

    E-print Network

    Subba Rao, Suhasini

    A test for second order stationarity of a time series based on the Discrete Fourier Transform stationary. Exploiting this important property, we construct a Portmanteau type test statistic for testing stationarity of the time series. It is shown that under the null of stationarity, the test statistic has

  15. A Cryogenic Test Set-Up for the Qualification of Pre-Series Test Cells for the LHC Cryogenic Distribution Line

    Microsoft Academic Search

    J Livran; G A Mourou; C Parente; G Riddone; D Rybkowski; N Veillet

    2000-01-01

    Three pre-series Test Cells of the LHC Cryogenic Distribution Line (QRL) [1], manufactured by three European industrial companies, will be tested in the year 2000 to qualify the design chosen and verify the thermal and mechanical performances. A dedicated test stand (170 m x 13 m) has been built for extensive testing and performance assessment of the pre-series units in

  16. Patch test results with the metalworking fluid series of the German Contact Dermatitis Research Group (DKG).

    PubMed

    Geier, Johannes; Lessmann, Holger; Dickel, Heinrich; Frosch, Peter J; Koch, Patrick; Becker, Detlef; Jappe, Uta; Aberer, Werner; Schnuch, Axel; Uter, Wolfgang

    2004-09-01

    Based on the information of the interdisciplinary task force on allergy diagnostics in the metal branch, in 2001, the German Contact Dermatitis Research Group (DKG) compiled two metalworking fluid (MWF) test series with currently and previously used components, respectively. After 2 years of patch testing, we present results obtained with these series, based on data of the Information Network of Departments of Dermatology (IVDK). 251 metalworkers who were patch tested because of suspected MWF dermatitis in 2002 and 2003 were included in this retrospective data analysis. Of these, 206 were tested with the current MWF series and 155 with the historical MWF series. Among the current MWF allergens, monoethanolamine ranked 1st with 11.6% positive reactions. Diethanolamine (3.0%), triethanolamine (1.1%), and diglycolamine (1.9%) elicited positive reactions far less frequently. Allergic reactions to p-aminoazobenzene were frequently observed (6.0%), but the relevance of these reactions is still obscure. Positive reactions to biocides ranged from 4.5% for Bioban CS 1135 to 0.5% for iodopropynyl butylcarbamate and 2-phenoxyethanol. Concomitant reactions to formaldehyde, which caused positive reactions in 3.3%, and formaldehyde releasers occurred to varying extents without conclusive pattern. No positive reactions were seen to dibutyl phthalate, di-2-ethylhexyl phthalate, tricresyl phosphate, isopropyl myristate or benzotriazole. With the historical MWF test series, positive reactions to methyldibromo glutaronitrile (MDBGN) were observed most frequently. However, sensitization via allergen sources other than MWF seems likely, as MDBGN, during the study period, has been one of the most frequent preservative allergens in cosmetics and body care products. Other historical MWF allergens comprised morpholinyl mercaptobenzothiazole (3.3%), benzisothiazolinone (BIT; 2.0%) and Bioban P 1487(1.3%). BIT is currently used in MWF again, so it was shifted to the current MWF test series. As decreasing reaction frequencies to former MWF allergens that are no longer used can be expected, the historical series should be re-evaluated after some years. The test series with current MWF allergens has to be kept up-to-date based on information from industry and to be kept concise by eliminating test substances which never cause positive reactions. PMID:15479200

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

    SciTech Connect

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

    1995-10-01

    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.).

  18. Radioisotope Thermoelectric Generator Transportation System licensed hardware second certification test series and package shock mount system test

    SciTech Connect

    Ferrell, P.C.; Moody, D.A. [Westinghouse Hanford Company, P.O. Box 1970, Richland, Washington 99352 (United States)

    1996-03-01

    This paper presents a summary of two separate drop test activities that were 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 {ital Title} 10, {ital Code} {ital of} {ital Federal} {ital Regulations}, {open_quote}{open_quote}Part 71{close_quote}{close_quote} (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 U.S. Department of Energy{close_quote}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, {ital Transit} {ital Drop} {ital Procedure} (DOE 1989), was used to verify that the shock limiting system limited accelerations in excess of 15 G{close_quote}s at frequencies below 150 Hz. Results of the package mount drop tests indicate that an impact force of 15 G{close_quote}s was not exceeded in any test from a free drop height of 457 mm (18 in.). {copyright} {ital 1996 American Institute of Physics.}

  19. Radioisotope Thermoelectric Generator Transportation System licensed hardware second certification test series and package shock mount system test

    NASA Astrophysics Data System (ADS)

    Ferrell, Patrick C.; Moody, Donald A.

    1996-03-01

    This paper presents a summary of two separate drop test activities that were 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 U.S. 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.).

  20. Test results on direct containment heating by high-pressure melt ejection into the Surtsey vessel: The TDS test series

    SciTech Connect

    Allen, M.D.; Blanchat, T.K.; Pilch, M.M. [Sandia National Lab., Albuquerque, NM (United States). Severe Accident Phenomenology

    1994-08-01

    The Technology Development and Scoping (TDS) test series was conducted to test and develop instrumentation and procedures for performing steam-driven, high-pressure melt ejection (HPME) experiments at the Surtsey Test Facility to investigate direct containment heating (DCH). Seven experiments, designated TDS-1 through TDS-7, were performed in this test series. These experiments were conducted using similar initial conditions; the primary variable was the initial pressure in the Surtsey vessel. All experiments in this test series were performed with a steam driving gas pressure of {approx_equal} 4 MPa, 80 kg of lumina/iron/chromium thermite melt simulant, an initial hole diameter of 4.8 cm (which ablated to a final hole diameter of {approx_equal} 6 cm), and a 1/10th linear scale model of the Surry reactor cavity. The Surtsey vessel was purged with argon (<0.25 mol% O{sub 2}) to limit the recombination of hydrogen and oxygen, and gas grab samples were taken to measure the amount of hydrogen produced.

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

    Microsoft Academic Search

    J. F. Hauer; W. A. Mittelstadt; R. J. Piwko; B. L. Damsky; J. D. Eden

    1995-01-01

    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 offline, show that the TCSC can be a

  2. Space Fission System Test Effectiveness

    NASA Astrophysics Data System (ADS)

    Houts, Mike; Schmidt, Glen L.; van Dyke, Melissa; Godfroy, Tom; Martin, James; Bragg-Sitton, Shannon; Dickens, Ricky; Salvail, Pat; Harper, Roger

    2004-02-01

    Space fission technology has the potential to enable rapid access to any point in the solar system. If fission propulsion systems are to be developed to their full potential, however, near-term customers need to be identified and initial fission systems successfully developed, launched, and utilized. One key to successful utilization is to develop reactor designs that are highly testable. Testable reactor designs have a much higher probability of being successfully converted from paper concepts to working space hardware than do designs which are difficult or impossible to realistically test. ``Test Effectiveness'' is one measure of the ability to realistically test a space reactor system. The objective of this paper is to discuss test effectiveness as applied to the design, development, flight qualification, and acceptance testing of space fission systems. The ability to perform highly effective testing would be particularly important to the success of any near-term mission, such as NASA's Jupiter Icy Moons Orbiter, the first mission under study within NASA's Project Prometheus, the Nuclear Systems Program.

  3. Space Fission System Test Effectiveness

    SciTech Connect

    Houts, Mike [Los Alamos National Laboratory, MS-K575, Los Alamos, NM 87545 (United States); Schmidt, Glen L. [New Mexico Tech, Institute for Engineering Research and Applications, 901 University Blvd SE, Albuquerque, NM 87109-4339 (United States); Van Dyke, Melissa; Godfroy, Tom; Martin, James; Bragg-Sitton, Shannon; Dickens, Ricky; Salvail, Pat; Harper, Roger [NASA MSFC, TD40, Marshall Space Flight Center, AL, 35812 (United States)

    2004-02-04

    Space fission technology has the potential to enable rapid access to any point in the solar system. If fission propulsion systems are to be developed to their full potential, however, near-term customers need to be identified and initial fission systems successfully developed, launched, and utilized. One key to successful utilization is to develop reactor designs that are highly testable. Testable reactor designs have a much higher probability of being successfully converted from paper concepts to working space hardware than do designs which are difficult or impossible to realistically test. ''Test Effectiveness'' is one measure of the ability to realistically test a space reactor system. The objective of this paper is to discuss test effectiveness as applied to the design, development, flight qualification, and acceptance testing of space fission systems. The ability to perform highly effective testing would be particularly important to the success of any near-term mission, such as NASA's Jupiter Icy Moons Orbiter, the first mission under study within NASA's Project Prometheus, the Nuclear Systems Program.

  4. 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

  5. Guided Waves Damage Identification in Beams with Test Pattern Dependent Series Neural Network Systems

    Microsoft Academic Search

    C. K. LIEW; M. VEIDT

    In regression neural networks for pattern recognition of preprocessed guided waves signals in beams, a trained network produced large errors when identifying a test pattern not found in the training set. To improve the accuracy of results, a new neural network procedure was introduced where progressive training was performed in a series combined network with the integration of a weight-range

  6. A structural time series test of the P-star model: evidence from the middle east

    Microsoft Academic Search

    George B. Tawadros

    2007-01-01

    In this article, a structural time series test of the P-star model is conducted using quarterly data for the Middle Eastern countries of Egypt, Jordan and Morocco. The conventional P-star model is altered to obtain an equation for the price level that consists of a stochastic trend and the actual levels of output and velocity. The empirical results obtained are

  7. Testing a Series of Causal Propositions Relating Time in Child Care to Children's Externalizing Behavior

    ERIC Educational Resources Information Center

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

    2010-01-01

    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…

  8. A Sequential and Iterative Testing Procedure to Identify the Nature of a Time Series Generating Process

    Microsoft Academic Search

    Elena Rusticelli; Estela Bee Dagum

    2012-01-01

    An inferential approach is proposed to identify the nature of the generating process corresponding to a real time series. This new sequential and iterative testing procedure goes beyond the Box and Jenkins methodology for the identification, estimation, and validation of linear data generating processes by investigating the probabilistic structure of non-Gaussian estimated residuals {?t} for the possible presence of nonlinear

  9. Reversal of the hofmeister series: specific ion effects on peptides.

    PubMed

    Paterová, Jana; Rembert, Kelvin B; Heyda, Jan; Kurra, Yadagiri; Okur, Halil I; Liu, Wenshe R; Hilty, Christian; Cremer, Paul S; Jungwirth, Pavel

    2013-07-11

    Ion-specific effects on salting-in and salting-out of proteins, protein denaturation, as well as enzymatic activity are typically rationalized in terms of the Hofmeister series. Here, we demonstrate by means of NMR spectroscopy and molecular dynamics simulations that the traditional explanation of the Hofmeister ordering of ions in terms of their bulk hydration properties is inadequate. Using triglycine as a model system, we show that the Hofmeister series for anions changes from a direct to a reversed series upon uncapping the N-terminus. Weakly hydrated anions, such as iodide and thiocyanate, interact with the peptide bond, while strongly hydrated anions like sulfate are repelled from it. In contrast, reversed order in interactions of anions is observed at the positively charged, uncapped N-terminus, and by analogy, this should also be the case at side chains of positively charged amino acids. These results demonstrate that the specific chemical and physical properties of peptides and proteins play a fundamental role in ion-specific effects. The present study thus provides a molecular rationalization of Hofmeister ordering for the anions. It also provides a route for tuning these interactions by titration or mutation of basic amino acid residues on the protein surface. PMID:23768138

  10. Unraveling the cause-effect relation between time series

    NASA Astrophysics Data System (ADS)

    Liang, X. San

    2014-11-01

    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.

  11. Testing backreaction effects with observations

    Microsoft Academic Search

    Julien Larena; Jean-Michel Alimi; Thomas Buchert; Martin Kunz; Pier-Stefano Corasaniti

    2009-01-01

    In order to quantitatively test the ability of averaged inhomogeneous cosmologies to correctly describe observations of the large-scale properties of the Universe, we introduce a smoothed template metric corresponding to a constant spatial curvature model at any time, but with an evolving curvature parameter. This metric is used to compute quantities along an approximate effective light cone of the averaged

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

    Microsoft Academic Search

    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

    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

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

    SciTech Connect

    Hoffman, Robert; Sak, James

    1992-09-01

    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.

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

    SciTech Connect

    Not Available

    1992-09-01

    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.

  15. Downflow heat transfer in a heated ribbed vertical annulus with a cosine power profile (results from test series ECS-2c)

    NASA Astrophysics Data System (ADS)

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

    1991-10-01

    Experiments designed to investigate downflow heat transfer 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-2c series, which was a follow on series to the ECS-2b series, conducted specifically to provide additional data on the effect of different powers at the same test conditions, for use in evaluation of possible power effects on the aluminum temperature measurements. Electrical powers at 90, 100, and 110 percent of the power required to result in the maximum aluminum temperature at fluid saturation temperature were used at each set of test conditions previously used in the ECS-2b series. The ECS-2b series was conducted in the same test rig as the previous ECS-2b series.

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

    Microsoft Academic Search

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

    1996-01-01

    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 oscillations. This paper discusses modulation procedures, analysis methods, and results for estimating the damping effectiveness of the TCSC. Modulation methods include driving

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

    NASA Technical Reports Server (NTRS)

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

    2014-01-01

    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.

  18. ENRAF Series 854 Advanced Technology Gauge (ATG) with SPU II card for Leak Detector Use Acceptance Test Procedure

    SciTech Connect

    SMITH, S.G.

    1999-10-21

    The following Acceptance Test Procedure was written to test the ENRAF series 854 ATG with SPU II card prior to installation in the Tank Farms. The procedure sets various parameters and verifies the gauge and alarms functionality.

  19. Effects of weather and climate on the dynamics of animal population time series.

    PubMed

    Knape, Jonas; de Valpine, Perry

    2011-04-01

    Weather is one of the most basic factors impacting animal populations, but the typical strength of such impacts on population dynamics is unknown. We incorporate weather and climate index data into analysis of 492 time series of mammals, birds and insects from the global population dynamics database. A conundrum is that a multitude of weather data may a priori be considered potentially important and hence present a risk of statistical over-fitting. We find that model selection or averaging alone could spuriously indicate that weather provides strong improvements to short-term population prediction accuracy. However, a block randomization test reveals that most improvements result from over-fitting. Weather and climate variables do, in general, improve predictions, but improvements were barely detectable despite the large number of datasets considered. Climate indices such as North Atlantic Oscillation are not better predictors of population change than local weather variables. Insect time series are typically less predictable than bird or mammal time series, although all taxonomic classes display low predictability. Our results are in line with the view that population dynamics is often too complex to allow resolving mechanisms from time series, but we argue that time series analysis can still be useful for estimating net environmental effects. PMID:20880886

  20. Using exogenous variables in testing for monotonic trends in hydrologic time series

    USGS Publications Warehouse

    Alley, W.M.

    1988-01-01

    One approach that has been used in performing a nonparametric test for monotonic trend in a hydrologic time series consists of a two-stage analysis. First, a regression equation is estimated for the variable being tested as a function of an exogenous variable. A nonparametric trend test such as the Kendall test is then performed on the residuals from the equation. By analogy to stagewise regression and through Monte Carlo experiments, it is demonstrated that this approach will tend to underestimate the magnitude of the trend and to result in some loss in power as a result of ignoring the interaction between the exogenous variable and time. An alternative approach, referred to as the adjusted variable Kendall test, is demonstrated to generally have increased statistical power and to provide more reliable estimates of the trend slope. -from Author

  1. An Out-of-Sample Test for Nonlinearity in Financial Time Series: An Empirical Application

    Microsoft Academic Search

    Theodore Panagiotidis

    2010-01-01

    This paper employs a local information, nearest neighbour forecasting methodology to test for evidence of nonlinearity in\\u000a financial time series. Evidence from well-known data generating process are provided and compared with returns from the Athens\\u000a stock exchange given the in-sample evidence of nonlinear dynamics that has appeared in the literature. Nearest neighbour forecasts\\u000a fail to produce more accurate forecasts from

  2. Accuracy testing using thick source alpha-particle spectroscopy for the U and Th series estimations.

    PubMed

    Michael, C T; Zacharias, N; Hein, A

    2010-01-01

    The new technique for the calculation of U and Th based on the alpha particle spectrum taken from a thick sample by using a silicon detector (PIPS) is tested and some technical problems are encountered and also some notifications for better accuracy are addressed. This technique which is mainly developed to be used for dose rate determination in TL, OSL and ESR dating applications, gives also the possibility for detecting and estimating possible disequilibrium in U and Th series. PMID:19900816

  3. Wind-Tunnel Tests on a Series of Wing Models Through a Large Angle of Attack Range. Part I : Force Tests

    NASA Technical Reports Server (NTRS)

    Knight, Montgomery; Wenzinger, Carl J

    1930-01-01

    This investigation covers force tests through a large range of angle of attack on a series of monoplane and biplane wing models. The tests were conducted in the atmospheric wind tunnel of the National Advisory Committee for Aeronautics. The models were arranged in such a manner as to make possible a determination of the effects of variations in tip shape, aspect ratio, flap setting, stagger, gap, decalage, sweep back, and airfoil profile. The arrangements represented most of the types of wing systems in use on modern airplanes. The effect of each variable is illustrated by means of groups of curves. In addition, there are included approximate autorotational characteristics in the form of calculated ranges of "rotary instability." a correction for blocking in this tunnel which applies to monoplanes at large angles of attack has been developed, and is given in an appendix. (author)

  4. Shots Wheeler to Morgan, the final eight tests of the Plumbbob series, 6 September - 7 October 1957. Final report

    Microsoft Academic Search

    J. Massie; J. Ponton

    1981-01-01

    This report describes the activities of DOD personnel, both military and civilian, in Shots WHEELER to MORGAN, the final eight nuclear tests in the PLUMBBOB atmospheric weapons testing series. The tests were conducted between 6 September and 7 October 1957 and involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and various AEC test groups. This volume also

  5. NCBI Handout Series | GTR | Last Update February 5, 2014 Contact: info@ncbi.nlm.nih.gov GTR: Genetic Testing Registry

    E-print Network

    Levin, Judith G.

    NCBI Handout Series | GTR | Last Update February 5, 2014 Contact: info@ncbi.nlm.nih.gov GTR: Genetic Testing Registry Central repository of genetic tests voluntarily supplied by test providers http://www.ncbi.nlm.nih.gov. In subse- quent phases, GTR will include tests for somatic variation. Data Access The GTR homepage (http://www,ncbi.nlm.nih.gov

  6. Patch testing with hair cosmetic series in Europe: a critical review and recommendation.

    PubMed

    Uter, Wolfgang; Bensefa-Colas, Lynda; Frosch, Peter; Giménez-Arnau, Ana; John, Swen M; Lepoittevin, Jean-Pierre; Lidén, Carola; White, Ian R; Duus Johansen, Jeanne

    2015-08-01

    Many key ingredients of hair cosmetics (in particular, dyes, bleaches, and hair-styling agents) are potent (strong to extreme) contact allergens. Some heterogeneity is apparent from published results concerning the range of allergens for which patch testing is important. The objective of the present review was to collect information on the current practice of using 'hair cosmetic series', and discuss this against the background of evidence concerning consumer/professional exposure and regulatory aspects to finally derive a recommendation for a 'European hair cosmetic series'. The methods involved (i) a survey targeting all members of the COST action 'StanDerm' (TD1206) consortium, (ii) analysis of data in the database of the European Surveillance System on Contact Allergies (ESSCA), and (iii) literature review. Information from 19 European countries was available, partly from national networks, and partly from one or several departments of dermatology or, occasionally, occupational medicine. Apart from some substances being tested only in single departments, a broad overlap regarding 'important' allergens was evident. Some of the substances are no longer permitted for use in cosmetics (Annex II of the Cosmetics Regulation). An up-to-date 'European hair cosmetics series', as recommended in the present article, should (i) include broadly used and/or potent contact allergens, (ii) eliminate substances of only historical concern, and (iii) be continually updated as new evidence emerges. PMID:26080054

  7. Fabrication and testing of W7-X pre-series target elements

    NASA Astrophysics Data System (ADS)

    Boscary, J.; Böswirth, B.; Greuner, H.; Grigull, P.; Missirlian, M.; Plankensteiner, A.; Schedler, B.; Friedrich, T.; Schlosser, J.; Streibl, B.; Traxler, H.

    2007-03-01

    The assembly of the highly-loaded target plates of the WENDELSTEIN 7-X (W7-X) divertor requires the fabrication of 890 target elements (TEs). The plasma facing material is made of CFC NB31 flat tiles bonded to a CuCrZr copper alloy water-cooled heat sink. The elements are designed to remove a stationary heat flux and power up to 10 MW m-2 and 100 kW, respectively. Before launching the serial fabrication, pre-series activities aimed at qualifying the design, the manufacturing route and the non-destructive examinations (NDEs). High heat flux (HHF) tests performed on full-scale pre-series TEs resulted in an improvement of the design of the bond between tiles and heat sink to reduce the stresses during operation. The consequence is the fabrication of additional pre-series TEs to be tested in the HHF facility GLADIS. NDEs of this bond based on thermography methods are developed to define the acceptance criteria suitable for serial fabrication.

  8. VISAR Validation Test Series at the Light Initiated High Explosive (LIHE) facility.

    SciTech Connect

    Covert, Timothy Todd

    2007-02-01

    A velocity interferometer system for any reflector (VISAR) was recently deployed at the light initiated high explosive facility (LIHE) to measure the velocity of an explosively accelerated flyer plate. The velocity data from the flyer plate experiments, using the vendor's fringe constant of 100m/s/fringe, were consistently lower than model predictions. The goal of the VISAR validation test series was to confirm the VISAR system fringe constant. A low velocity gas gun was utilized to impact and accelerate a target at the LIHE facility. VISAR velocity data from the accelerated target was compared against an independent velocity measurement. The data from this test series did in fact reveal the fringe constant was significantly higher than the vendor's specification. The correct fringe constant for the LIHE VISAR system has been determined to be 123 m/s/fringe. The Light Initiated High Explosive (LIHE) facility recently completed a Phase I test series to develop an explosively accelerated flyer plate (X-Flyer). The X-Flyer impulse technique consists of first spraying a thin layer of silver acetylide silver nitrate explosive onto a thin flyer plate. The explosive is then initiated using an intense flash of light. The explosive detonation accelerates the flyer across a small air gap towards the test item. The impact of the flyer with the test item creates a shock pulse and an impulsive load in the test unit. The goal of Phase I of the X-Flyer development series was to validate the technique theory and design process. One of the key parameters that control the shock pulse and impulsive load is the velocity of the flyer at impact. To measure this key parameter, a velocity interferometer system for any reflector (VISAR) was deployed at the LIHE facility. The VISAR system was assembled by Sandia personnel from the Explosive Projects and Diagnostics department. The VISAR was a three leg, push-pull system using a fixed delay cavity. The primary optical components consisted of a delay bar and stand off that holds the air-reference mirror. When this component was ordered 2 years ago, a fringe constant of 100 m/s/fringe for a 532nm laser was specified. The fabrication/assembly vendor went out of business shortly after delivering the component and did not deliver the certification papers with the component. The vendor documentation to verify the fringe constant was not made available to Sandia. VISAR systems were generally not calibrated because the fringe constant could be determined from a known glass index of refraction and length. The VISAR system was deployed at the LIHE facility using the specified 100m/s/fringe. The Phase I X-Flyer development series was completed successfully measuring flyer velocities using the VISAR system. However flyer velocity measurements were on average 18% lower than analytical model predictions. In an effort to resolve the consistently slow velocity data, the VISAR data was under scrutiny. The purpose of the LIHE VISAR validation test series is to verify the velocity data taken with the VISAR system.

  9. Dynamic performance of packed-bed dehumidifiers: experimental results from the SERI desiccant test loop

    SciTech Connect

    Kutscher, C F; Barlow, R S

    1982-08-01

    Discussed are the design and construction of a desiccant test loop and results of tests with a silica-gel-packed bed. The test loop consists of two centrifugal fans, two duct heaters, a steam humidifier, 24.4m (80 ft) of 30-cm (12-in.) circular duct, instrumentation, and a test section. The loop is capable of testing adsorption and desorption modes at flow rates up to 0.340 kg/s (600 scfm) and at regeneration temperatures up to 120/sup 0/C (248/sup 0/F). Tests of a 74-cm(29-in.)-diameter, 3.2-cm(1.25-in.)-thick silica gel bed indicated that mass transfer occurs more readily in the adsorption direction than in the desorption direction. Pressure drop data indicated that the resistance of each of the two screens that hold the silica gel in place was equivalent to 2.5-cm(1-in.) of silica gel due to plugging. Results of the tests were also used to validate a SERI desiccant computer model, DESSIM.

  10. General-Purpose Heat Source: Research and development program: Cold-Process Verification Test Series

    SciTech Connect

    Reimus, M.A.H.; George, T.G.

    1996-06-01

    The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements. Because any space mission could experience a launch abort or return from orbit, the heat source must be designed and constructed to survive credible accident environments. Previous testing conducted in support of the Galileo and Ulysses missions documented the response of GPHSs and individual GPHS capsules fueled with {sup 238}UO{sub 2} ({sup 235}U-depleted) to a variety of explosive overpressure and impact events. In the early 1990s, Los Alamos National Laboratory (LANL) resumed fabrication of {sup 238}UO{sub 2} GPHS pellets. The Cold-Process Verification (CPV) Test Series was designed to compare the response of GPHS heat sources loaded with recently fabricated hot- and cold-pressed {sup 238}UO{sub 2} pellets to the response of urania pellets used in the Galileo and Ulysses performance tests. This report documents eleven bare-capsule impacts and one impact of a fully loaded GPHS module. All of the failures observed in the bare-clad impact tests were similar to failures observed in previous safety tests. No failures occurred in the module impact test.

  11. The Effect of Recent Consumption of Caffeine-Containing Foodstuffs on Neuropsychological Tests in the Elderly

    Microsoft Academic Search

    Valerie E. Lesk; Thurza E. M. Honey; Celeste A. de Jager

    2009-01-01

    We investigated the effect of recent intake of caffeine-containing foodstuffs (CCFS) on a group of elderly participants (age range 67–95 years) on a series of neuropsychological tests. There was no significant effect of CCFS intake on performance in any of the tests in the battery used. However, a significant interaction effect was found between age and CCFS consumption on scores

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

    USGS Publications Warehouse

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

    1988-01-01

    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.

  13. Characterization and Correction of Interpolation Effects in the Realignment of fMRI Time Series

    E-print Network

    Gabrieli, John

    Characterization and Correction of Interpolation Effects in the Realignment of fMRI Time Series S time series. The nature of these artifacts is characterized using simulated displacements of an f interpo- lation errors from the image time series on a voxel-by- voxel basis is proposed. The artifacts

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

    E-print Network

    He, Zhihai "Henry"

    Battery (SPPB) test, a series of timed physical activities that have been created to evaluate performance battery test, Eldercare technology I. INTRODUCTION lder adults are living longer and more in elders. So, we centered on the Short Physical Performance Battery (SPPB) test [3]. This exam was created

  15. Shots Boltzmann to Wilson, the first four tests of the Plumbbob series, 28 May - 18 June 1957. Final report

    Microsoft Academic Search

    M. Wilkinson; C. Simpson; J. Massie

    1981-01-01

    This report describes the activities of DOD personnel, both military and civilian, in Shots BOLTZMANN to WILSON, the first four nuclear tests in the PLUMBBOB Series, which were conducted from 28 May to 18 June 1957. The tests involved participants from Exercise Desert Rock VII and VIII, AFSWP, AFSWC, and various AEC test groups. This volume also describes the radiological

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

    ERIC Educational Resources Information Center

    Sween, Joyce; Campbell, Donald T.

    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…

  17. Fuel performance improvement program: description and characterization of HBWR Series H-2, H-3, and H-4 test rods

    SciTech Connect

    Guenther, R.J.; Barner, J.O.; Welty, R.K.

    1980-03-01

    The fabrication process and as-built characteristics of the HBWR Series H-2 and H-3 test rods, as well as the three packed-particle (sphere-pac) rods in HBWR Series H-4 are described. The HBWR Series H-2, H-3, and H-4 tests are part of the irradiation test program of the Fuel Performance Improvement Program. Fifteen rods were fabricated for the three test series. Rod designs include: (1) a reference dished pellet design incorporating chamfered edges, (2) a chamfered, annular pellet design combined with graphite-coated cladding, and (3) a sphere-pac design. Both the annular-coated and sphere-pac designs include internal pressurization using helium.

  18. Fabrication and test of LARP technological quadrupole models of TQC series

    SciTech Connect

    Bossert, R.C.; Ambrosio, G.; Andreev, N.; Barzi, E.; Chlachidze, G.; Feher, S.; Kashikhin, V.S.; Kashikhin, V.V.; Lamm, M.; Nobrega, A.; Novitski, I.; /Fermilab /LBL, Berkeley /Brookhaven

    2008-08-01

    In support of the development of a large-aperture Nb3Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, several two-layer technological quadrupole models of TQC series with 90 mm aperture and collar-based mechanical structure have been developed at Fermilab in collaboration with LBNL. This paper summarizes the results of fabrication and test of TQC02a, the second TQC model based on RRP Nb3Sn strand, and TQC02b, built with both MJR and RRP strand. The test results presented include magnet strain and quench performance during training, as well as quench studies of current ramp rate and temperature dependence from 1.9K to 4.5K.

  19. Fabrication and Test of LARP Technological Quadrupole Models of TQC Series

    SciTech Connect

    Bossert, Rodger C.; Ambrosio, Giorgio; Andreev, Nilolai; Barzi, Emanuela; Chlachidze, Guram; Feher, Sandor; Kashikhin, Vladimir S.; Kashikhin, Vadim V.; Lamm, Michael; Nobrega, Alfred; Novitski, Igor; Orris, Darryl; Tartaglia, Michael; Zlobin, Alexander V.; Caspi, Shlomo; Dietderich, Daniel R.; Ferracin, Paolo; Hafalia, A. R.; Sabbi, GianLuca; Ghosh, Arup; Wanderer, Peter

    2008-08-17

    In support of the development of a large-aperture Nb3Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, several two-layer technological quadrupole models of TQC series with 90 mm aperture and collar-based mechanical structure have been developed at Fermilab in collaboration with LBNL. This paper summarizes the results of fabrication and test of TQC02a, the second TQC model based on RRP Nb3Sn strand, and TQC02b, built with both MJR and RRP strand. The test results presented include magnet strain and quench performance during training, as well as quench studies of current ramp rate and temperature dependence from 1.9 K to 4.5 K.

  20. Enraf Series 854 advanced technology gauge (ATG) acceptance test procedure. Revision 2

    SciTech Connect

    Barnes, G.A.

    1995-01-30

    This procedure checks that the shipment of the gauge to Hanford did not cause a failure. 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. Enraf-Nonius Series 854 level gauges are certified by Factory Mutual (FM) for National Fire Protectional Association (NFPA 70) hazardous Class 1, Division 1, Groups B, C, and D Locations. Its measuring principle is based on the detection of variations in the weight of a displacer suspended in the process fluid. The displacer is connected to a wire wounded on a precision measuring drum. A level change causes a change in the weight of the displacer which will be detected by the force transducer. Electronics within the gauge cause a servo motor to adjust the position of the displacer and compute the tank level based on the new position of the displacer drum. The gauge displays the level in decimal inches. An analog output signal transmits the level data for remote data processing.

  1. Time-series intervention analysis of pedestrian countdown timer effects.

    PubMed

    Huitema, Bradley E; Van Houten, Ron; Manal, Hana

    2014-11-01

    Pedestrians account for 40-50% of traffic fatalities in large cities. Several previous studies based on relatively small samples have concluded that Pedestrian Countdown Timers (PCT) may reduce pedestrian crashes at signalized intersections, but other studies report no reduction. The purposes of the present article are to (1) describe a new methodology to evaluate the effectiveness of introducing PCT signals and (2) to present results of applying this methodology to pedestrian crash data collected in a large study carried out in Detroit, Michigan. The study design incorporated within-unit as well as between-unit components. The main focus was on dynamic effects that occurred within the PCT unit of 362 treated sites during the 120 months of the study. An interrupted time-series analysis was developed to evaluate whether change in crash frequency depended upon of the degree to which the countdown timers penetrated the treatment unit. The between-unit component involved comparisons between the treatment unit and a control unit. The overall conclusion is that the introduction of PCT signals in Detroit reduced pedestrian crashes to approximately one-third of the preintervention level. The evidence for this reductionis strong and the change over time was shown to be a function of the extent to which the timers were introduced during the intervention period. There was no general drop-off in crash frequency throughout the baseline interval of over five years; only when the PCT signals were introduced in large numbers was consistent and convincing crash reduction observed. Correspondingly, there was little evidence of change in the control unit. PMID:25003967

  2. Times Series Study of Effects of Petroleum Production on GDP 

    E-print Network

    Ballinger, Leslie 1991-

    2012-05-02

    development. The countries studied include: Argentina, Canada, Colombia, the United States, Mexico, Venezuela, Peru, and Indonesia. The dates of analysis are different for every country due to data reliability. This paper focuses mainly on a time series...

  3. Investigations of the software testing coupling effect

    Microsoft Academic Search

    A. Jefferson Offutt

    1992-01-01

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

  4. Effects of structural tests on aircraft safety

    Microsoft Academic Search

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

    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

  5. Health maintenance facility system effectiveness testing

    NASA Technical Reports Server (NTRS)

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

    1993-01-01

    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.

  6. Comparing the Effectiveness of Software Testing Strategies

    Microsoft Academic Search

    Victor R. Basili; Richard W. Selby

    1987-01-01

    This study applies an experimentation methodology to compare three state-of-the-practice software testing techniques: a) code reading by stepwise abstraction, b) functional testing using equivalence partitioning and boundary value analysis, and c) structural testing using 100 percent statement coverage criteria. The study compares the strategies in three aspects of software testing: fault detection effectiveness, fault detection cost, and classes of faults

  7. Anomalous transient uplift observed at the Lop Nor, China nuclear test site using satellite radar interferometry time-series analysis

    NASA Astrophysics Data System (ADS)

    Vincent, P.; Buckley, S. M.; Yang, D.; Carle, S. F.

    2011-12-01

    Anomalous uplift is observed at the Lop Nor, China nuclear test site using ERS satellite SAR data. Using an InSAR time-series analysis method, we show that an increase in absolute uplift with time is observed between 1997 and 1999. The signal is collocated with past underground nuclear tests. Due to the collocation in space with past underground tests we postulate a nuclear test-related hydrothermal source for the uplift signal. A possible mechanism is presented that can account for the observed transient uplift and is consistent with documented thermal regimes associated with underground nuclear tests conducted at the Nevada National Security Site (NNSS) (formerly the Nevada Test Site).

  8. 17 CFR 240.12d1-1 - Registration effective as to class or series.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...EXCHANGE ACT OF 1934 Rules and Regulations Under the Securities Exchange Act of 1934 Certification by Exchanges and Effectiveness of Registration § 240.12d1-1 Registration effective as to class or series. (a) An application...

  9. Testing and Development Progress for the Safe Affordable Fission Engine (SAFE) Testing Series in the High Power Propulsion Thermal Simulator (HPPTS) at Marshall Space Flight Center

    SciTech Connect

    Van Dyke, Melissa; Houts, Mike; Godfroy, Tom; Dickens, Ricky [Marshall Space Flight Center, National Aeronautics and Space Administration, Huntsville, Alabama, 35812 (United States); Poston, David; Kapernick, Rick; Reid, Bob [Los Alamos National Laboratory, University of California, US Department of Energy, PO Box 1663, MS J576, Los Alamos, New Mexico 87545 (United States); Salvail, Pat [ITT Research Institute, Marshall Space Flight Center, National Aeronautics and Space Administration, Huntsville, Alabama, 35812 (United States); Ring, Peter [Advanced Methods and Materials, 510 Lawrence Expressway, Suite 203, Sunnyvale, California, 94086 (United States)

    2002-07-01

    Successful development of space fission systems will require an extensive program of affordable and realistic testing. In addition to tests related to design/development of the fission system, realistic testing of the actual flight unit must also be performed. Testing can be divided into two categories, non-nuclear tests and nuclear tests. Full power nuclear tests of space fission systems are expensive, time consuming, and of limited use, even in the best of programmatic environments. If the system is designed to operate within established radiation damage and fuel burn up limits while simultaneously being designed to allow close simulation of heat from fission using resistance heaters, high confidence in fission system performance and lifetime can be attained through a series of non-nuclear tests. Non-nuclear tests are affordable and timely, and the cause of component and system failures can be quickly and accurately identified. The Safe Affordable Fission Engine (SAFE) test series, whose ultimate goal is the demonstration of a 400 kW flight configuration system, has demonstrated that realistic testing can be performed using non-nuclear methods. This test series, carried out in collaboration with other NASA centers, other government agencies, industry, and universities, successfully completed a testing program with a 30 kWt core, Stirling engine, and ion engine configuration. Additionally, a 100 kWt core is in fabrication and appropriate test facilities are being reconfigured. This paper describes the current SAFE non-nuclear tests, which includes test article descriptions, test results and conclusions, and future test plans. (authors)

  10. Note---Analysis of Time Series with Calendar Effects

    Microsoft Academic Search

    Lon-Mu Liu

    1980-01-01

    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

  11. Hot-flow tests of a series of 10-percent-scale turbofan forced mixing nozzles

    NASA Technical Reports Server (NTRS)

    Head, V. L.; Povinelli, L. A.; Gerstenmaier, W. H.

    1984-01-01

    An approximately 1/10-scale model of a mixed-flow exhaust system was tested in a static facility with fully simulated hot-flow cruise and takeoff conditions. Nine mixer geometries with 12 to 24 lobes were tested. The areas of the core and fan stream were held constant to maintain a bypass ratio of approximately 5. The research results presented in this report were obtained as part of a program directed toward developing an improved mixer design methodology by using a combined analytical and experimental approach. The effects of lobe spacing, lobe penetration, lobe-to-centerbody gap, lobe contour, and scalloping of the radial side walls were investigated. Test measurements included total pressure and temperature surveys, flow angularity surveys, and wall and centerbody surface static pressure measurements. Contour plots at various stations in the mixing region are presented to show the mixing effectiveness for the various lobe geometries.

  12. Laboratory tests for single-event effects

    Microsoft Academic Search

    S. Buchner; D. McMorrow; J. Melinger; A. B. Camdbell

    1996-01-01

    Integrated circuits are currently tested at accelerators for their susceptibility to single-event effects (SEE's). However, because of the cost and limited accessibility associated with accelerator testing, there is considerable interest in developing alternate testing methods. Two laboratory techniques for measuring SEE, one involving a pulsed laser and the other 252Cf, are described in detail in this paper. The pulsed laser

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

    PubMed Central

    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

    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

  14. Development and implementation of instrumentation for WIPP (Waste Isolation Pilot Plant) Test Series A of the small-scale seal performance tests. Final report

    SciTech Connect

    Ainsworth, D.L.

    1988-01-01

    The Waste Isolation Pilot Plant (WIPP) facility is a research and development facility being developed by the US Department of Energy (DOE) near Carlsbad, New Mexico for the purpose of demonstrating the safe disposal of radioactive waste accumulated from the United States defense programs. The WIPP facility is located in a bedded-salt deposit 2150 ft (656m) below the ground surface. Sandia National Laboratories (SNL) is conducting a repository sealing Research and Development Program at the WIPP facility. The work discussed in this report was in support of Test Series A of the Small-Scale Seal Performance Tests being conducted at the WIPP facility for SNL. The Small-Scale Seal Performance Tests consist of a series of in-situ experiments designed to evaluate the performance of various candidate seal materials emplaced in boreholes in the host rock. At the request of SNL, the Concrete Technology Division (CTD) of Waterways Experiment Station (WES) developed an instrumentation program of sufficient magnitude to support the thermal and structural studies of the concrete seal to rock system being conducted for SNL by others at CTD WES and SNL. The test program consisted of two phases: a laboratory mockup of the Test Series A configuration, conducted at WES; and a Test Series A field experiment, conducted underground at the WIPP facility.

  15. Testing Effectiveness of Algorithm Animation

    Microsoft Academic Search

    Judith S. Gurka; Wayne Citrin

    1996-01-01

    Studies designed to demonstrate the pedagogic effectiveness of algorithm animation programs have been markedly unsuccessful, in spite of high expectations. We present a framework for future experiments based upon design issues particular to algorithm animation, plus pertinent educational considerations. Guidelines are drawn from a meta-analysis of previous work and experiments we have performed

  16. Gaussian process test for high-throughput sequencing time series: application to experimental evolution

    PubMed Central

    Topa, Hande; Jónás, Ágnes; Kofler, Robert; Kosiol, Carolin; Honkela, Antti

    2015-01-01

    Motivation: Recent advances in high-throughput sequencing (HTS) have made it possible to monitor genomes in great detail. New experiments not only use HTS to measure genomic features at one time point but also monitor them changing over time with the aim of identifying significant changes in their abundance. In population genetics, for example, allele frequencies are monitored over time to detect significant frequency changes that indicate selection pressures. Previous attempts at analyzing data from HTS experiments have been limited as they could not simultaneously include data at intermediate time points, replicate experiments and sources of uncertainty specific to HTS such as sequencing depth. Results: We present the beta-binomial Gaussian process model for ranking features with significant non-random variation in abundance over time. The features are assumed to represent proportions, such as proportion of an alternative allele in a population. We use the beta-binomial model to capture the uncertainty arising from finite sequencing depth and combine it with a Gaussian process model over the time series. In simulations that mimic the features of experimental evolution data, the proposed method clearly outperforms classical testing in average precision of finding selected alleles. We also present simulations exploring different experimental design choices and results on real data from Drosophila experimental evolution experiment in temperature adaptation. Availability and implementation: R software implementing the test is available at https://github.com/handetopa/BBGP. Contact: hande.topa@aalto.fi, agnes.jonas@vetmeduni.ac.at, carolin.kosiol@vetmeduni.ac.at, antti.honkela@hiit.fi Supplementary information: Supplementary data are available at Bioinformatics online. PMID:25614471

  17. Retrieval Mode Distinguishes the Testing Effect from the Generation Effect

    ERIC Educational Resources Information Center

    Karpicke, Jeffrey D.; Zaromb, Franklin M.

    2010-01-01

    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…

  18. Just entertainment: effects of TV series about intrigue on young adults

    PubMed Central

    Wang, Fei; Lin, Shengdong; Ke, Xue

    2015-01-01

    The potential harmful effects of media violence have been studied systematically and extensively. However, very little attention has been devoted to the intrigue and struggles between people depicted in the mass media. A longitudinal randomized experimental group-control group, pretest–posttest design study was conducted to examine the potential effects of this type of TV series on young adults. A typical and popular TV series was select as a stimulus. By scrutinizing the outline of this TV series and inspired by studies of the effects of media violence, one behavioral observation and five scales were adopted as dependent measures. The study did not find any effect of the intrigue TV series on any of the six dependent variables. Finally, possible interference variables or moderators were discussed. PMID:26029127

  19. Just entertainment: effects of TV series about intrigue on young adults.

    PubMed

    Wang, Fei; Lin, Shengdong; Ke, Xue

    2015-01-01

    The potential harmful effects of media violence have been studied systematically and extensively. However, very little attention has been devoted to the intrigue and struggles between people depicted in the mass media. A longitudinal randomized experimental group-control group, pretest-posttest design study was conducted to examine the potential effects of this type of TV series on young adults. A typical and popular TV series was select as a stimulus. By scrutinizing the outline of this TV series and inspired by studies of the effects of media violence, one behavioral observation and five scales were adopted as dependent measures. The study did not find any effect of the intrigue TV series on any of the six dependent variables. Finally, possible interference variables or moderators were discussed. PMID:26029127

  20. Fire Fighter Level I-II-III [and] Practical Skills Test. Wisconsin Fire Service Certification Series. Final Revision.

    ERIC Educational Resources Information Center

    Pribyl, Paul F.

    Practical skills tests are provided for fire fighter trainees in the Wisconsin Fire Service Certification Series, Fire Fighter Levels I, II, and III. A course introduction appears first and contains this information: recommended instructional sequence, required facilities, instructional methodology, requirements for certification, course…

  1. Random Test Run Length and Effectiveness

    NASA Technical Reports Server (NTRS)

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

    2008-01-01

    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.

  2. Detection of Undocumented Changepoints Using Multiple Test Statistics and Composite Reference Series

    E-print Network

    undocumented, artificial changepoint detection skill in climate series. The use of successive hypothesis splitting algorithm also compares favorably to optimal solutions, even when changepoints are not hierarchic. 1. Introduction Climatic time series that are free of artificial change- points are indispensable

  3. The Negative Testing Effect and Multifactor Account

    ERIC Educational Resources Information Center

    Peterson, Daniel J.; Mulligan, Neil W.

    2013-01-01

    Across 3 experiments, we investigated the factors that dictate when taking a test improves subsequent memory performance (the "testing effect"). In Experiment 1, participants retrieving a set of targets during a retrieval practice phase ultimately recalled fewer of those targets compared with a group of participants who studied the…

  4. Tide effects removed from well tests

    SciTech Connect

    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

    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.

  5. The short term effects of preoperative neuroscience education for lumbar radiculopathy: A case series

    PubMed Central

    Louw, Adriaan; Diener, Ina

    2015-01-01

    Background Recently a preoperative pain neuroscience education (NE) program was developed for lumbar surgery (LS) for radiculopathy as a means to decrease postoperative pain and disability. This study attempts to determine the short term effects, if any, of providing NE before surgery on patient outcomes. Methods A case series of 10 patients (female = 7) received preoperative one-on-one educational session by a physical therapist on the neuroscience of pain, accompanied by an evidence-based booklet, prior to LS for radiculopathy. Post-intervention data was gathered immediately after NE, as well as 1, 3 and 6 months following LS. Primary outcome measures were Pain Catastrophization Scale (PCS), forward flexion, straight leg raise (SLR) and beliefs regarding LS. Results Immediately following NE for LS for radiculopathy, all patients had lower PCS scores, with 5 patients exceeding the MDC score of 9.1 and 8 of the patients had PCS change scores exceeding the MDC by the 1, 3 and 6 month follow ups. Physical changes showed that fingertip-to-floor test in 6 patients had changes in beyond the MDC of 4.5 cm and 6 patients had changes in SLR beyond the MDC of 5.7°. The main finding, however, indicated a positive and more realistic shift in expectations regarding pain after the impending LS by all patients. Conclusions The results of the case series suggest that immediately after NE, patients scheduled for LS for radiculopathy had meaningful detectable changes in pain catastrophizing, fingertip-to-floor test, passive SLR and positive shifts in their beliefs about LS. PMID:26056626

  6. Multiple tests of cost-effectiveness angles.

    PubMed

    Gutjahr, G; Brannath, W

    2013-05-10

    Cost-effectiveness angles are an attractive measure of performance when comparing effects and costs of health-care therapies because they have a clear interpretation and are well suited for statistical inference. In clinical trials, a common setup is the comparison of multiple new therapies with a single control. If cost-effectiveness angles are calculated for each comparison, multiplicity issues should be taken into account when quantifying uncertainty of the point estimates. Therefore, this paper proposes a parametric test for multiple cost-effectiveness angles that guarantees strong family-wise error rate control. The idea is to replace the test of m cost-effectiveness angles as a union-intersection test of 3m linear hypotheses. Considering the correlation structure of the individual test statistics for the linear hypotheses leads to a maximum-type test for the intersection hypothesis. Inverting these test decisions then gives simultaneous CIs of cost-effectiveness angles with the appropriate coverage probabilities. PMID:22826103

  7. AGARD flight test techniques series. Volume 9: Aircraft exterior noise measurement and analysis techniques

    NASA Astrophysics Data System (ADS)

    Heller, H.

    1991-04-01

    Testing and analysis techniques to measure aircraft noise primarily for purposes of noise certification as specified by the 'International Civil Aviation Organization', ICAO are described. The relevant aircraft noise certification standards and recommended practices are presented in detail for subsonic jet aircraft, for heavy and light propeller-driven aircraft, and for helicopters. The practical execution of conducting noise certification tests is treated in depth. The characteristics and requirements of the acoustic and non-acoustic instrumentation for data acquisition and data processing are discussed, as are the procedures to determine the special noise measures - effective perceived noise level (EPNL) and maximum overall A-weighted noise level (L sub pA,max) - that are required for the noise certification of different types of aircraft. The AGARDograph also contains an extensive, although selective, discussion of test and analysis techniques for more detailed aircraft noise studies by means of either flight experiments or full-scale and model-scale wind tunnel experiments. Appendices provide supplementary information.

  8. ENRAF Series 854 Advanced Technology Gauge (ATG) with SPU ll Card for Leak Detector Use Acceptance Test Procedure

    SciTech Connect

    SMITH, S.G.

    1999-08-13

    This procedure checks the Enraf gauge received at Hanford is completely functional and has received no shipping damage. This procedure does not certify the gauge operation. The manufacturer certifies gauge operation. This procedure provides acceptance testing for Enraf Series 854 level gauges used to detect leaks in Hanford Waste Storage Tank annuli. 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. This ATP does not set up the gauge for any specific tank, but is generalized to permit testing the gauge prior to installation package preparation.

  9. Presentation Order Effects in Product Taste Tests.

    ERIC Educational Resources Information Center

    Dean, Michael L.

    1980-01-01

    Presentation order in paired-comparison testing was varied to measure the impact of primacy v recency effects on consumer product evaluation. First position preference bias characterized the findings, lending support to the attention decrement hypothesis or a suggested palate desensitization effect on subsequent taste trial behavior. (Author)

  10. Effects of a homologous series of linear alcohol ethoxylate surfactants on fathead minnow early life stages.

    PubMed

    Lizotte, R E; Wong, D C; Dorn, P B; Rodgers, J H

    1999-11-01

    Effects of a homologous series of three primarily linear alcohol ethoxylate surfactants were studied in laboratory flow-through 28-day early-life-stage tests with fathead minnow (Pimephales promelas Rafinesque). Surfactants were a C(9-11), C(12-13), and C(14-15) with an average of 6, 6.5, and 7 ethylene oxide units per mole of alcohol, respectively. Average measured surfactant recoveries were 103%, 81%, and 79% of nominal concentrations for the C(9-11) EO 6, C(12-13) EO 6.5, and C(14-15) EO 7 studies, respectively. Embryo survival at 48 h was not adversely affected at any of the concentrations tested. Impaired hatching and deformed fry were observed only in the C(12-13) EO 6.5 study. The 28-day LC50 values were 4.87, 2.39, and 1.02 mg/L for the C(9-11) EO 6, C(12-13) EO 6.5, and C(14-15) EO 7 surfactants, respectively. The corresponding NOECs for survival were 1.01, 1.76, and 0.74 mg/L. Posthatch fry growth was more sensitive than survival for the C(12-13) EO 6.5 and C(14-15) EO 7 surfactants. Survival of posthatch fry decreased with increasing surfactant alkyl chain length. Twenty-eight-day laboratory data were compared to 96-h laboratory, 10-day laboratory and 30-day stream mesocosm data for fathead minnow previously determined for these surfactants. Survival endpoints from the different exposures were comparable and only varied within a factor of two. Similarity of results suggests that it is possible to effectively use 96-h, 10-day, or 28-day laboratory data to predict environmental effects concentrations of these surfactants for fish. http://link.springer-ny. com/link/service/journals/00244/bibs/37n4p536.html

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

    PubMed

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

    2013-10-01

    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

  12. Effective Pedagogy in Social Sciences. Educational Practices Series-23

    ERIC Educational Resources Information Center

    Sinnema, Claire; Aitken, Graeme

    2012-01-01

    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…

  13. Cost-Effective School Alarm Systems. Security Topics Series.

    ERIC Educational Resources Information Center

    Kaufer, Steve

    This document outlines considerations in the selection of a cost-effective school-alarm system. Steps in the planning process include: conducting a district needs assessment; gathering input from all staff levels; consulting technical expertise; and selecting a security system that can be integrated with other site needs. It further describes the…

  14. The impact of test suite granularity on the cost-effectiveness of regression testing

    Microsoft Academic Search

    Gregg Rothermelt; Sebastian G. Elbaum; Alexey G. Malishevsky; Praveen Kallakurit; Brian Daviat

    2002-01-01

    Regression testing is an expensive testing process used to validate software following modifications. The cost-effectiveness of regression testing techniques varies with characteristics of test suites. One such characteristic, test suite granularity, involves the way in which test inputs are grouped into test cases within a test suite. Various cost-benefits tradeoffs have been attributed to choices of test suite granularity, but

  15. NBER WORKING PAPER SERIES INTERGENERATIONAL LONG TERM EFFECTS OF PRESCHOOL -STRUCTURAL

    E-print Network

    Bandyopadhyay, Antar

    NBER WORKING PAPER SERIES INTERGENERATIONAL LONG TERM EFFECTS OF PRESCHOOL - STRUCTURAL ESTIMATES to the source. #12;Intergenerational Long Term Effects of Preschool - Structural Estimates from a Discrete of preschool investment choices of altruistic parents and then empirically estimates the structural parameters

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

    Microsoft Academic Search

    Christopher A. Sims

    1992-01-01

    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,

  17. Subsonic roll-damping characteristics of a series of wings. [wind tunnel tests of various wing planforms

    NASA Technical Reports Server (NTRS)

    Boyden, R. P.

    1974-01-01

    The aerodynamic damping in roll of a series of wings has been investigated in the Langley high-speed 7- by 10-foot tunnel at Mach numbers ranging from 0.2 to 0.8 by use of a forced oscillatory-roll technique. Tests were conducted on wings of aspect ratio 6 with sweep angles of 25, 35, and 45 deg and on 35 deg swept wings of aspect ratios 4 and 5.

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

    NASA Technical Reports Server (NTRS)

    Parker, J. C.

    1979-01-01

    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.

  19. Effects of Laser Wavelength on Ablator Testing

    NASA Technical Reports Server (NTRS)

    White, Susan M.

    2014-01-01

    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.

  20. Two-Sample Testing in High Dimension and a Smooth Block Bootstrap for Time Series 

    E-print Network

    Gregory, Karl Bruce

    2014-06-12

    test statistic for testing the equality of two population mean vectors in the "large-p-small-n" setting. Such a test must surmount the rank-deficiency of the sample covariance matrix, which breaks down the classic Hotelling T^(2) test. The proposed...

  1. The Language Testing Cycle: From Inception to Washback. Series S, Number 13.

    ERIC Educational Resources Information Center

    Wigglesworth, Gillian, Ed.; Elder, Catherine, Ed.

    A selection of essays on language testing includes: "Perspectives on the Testing Cycle: Setting the Scene" (Catherine Elder, Gillian Wigglesworth); "The Politicisation of English: The Case of the STEP Test and the Chinese Students" (Lesleyanne Hawthorne); "Developing Language Tests for Specific Populations" (Rosemary Baker); "Developing Rating…

  2. Controlling Item Allocation in the Automated Assembly of Multiple Test Forms. ACT Research Report Series.

    ERIC Educational Resources Information Center

    Spray, Judith; Lin, Chuan-Ju; Chen, Troy T.

    Automated test assembly is a technology for producing multiple, equivalent test forms from an item pool. An important consideration for test security in automated test assembly is the inclusion of the same items on these multiple forms. Although it is possible to use item selection as a formal constraint in assembling forms, the number of…

  3. Two-Sample Testing in High Dimension and a Smooth Block Bootstrap for Time Series

    E-print Network

    Gregory, Karl Bruce

    2014-06-12

    test statistic for testing the equality of two population mean vectors in the "large-p-small-n" setting. Such a test must surmount the rank-deficiency of the sample covariance matrix, which breaks down the classic Hotelling T^(2) test. The proposed...

  4. Dynamic performance of packed-bed dehumidifiers: experimental results from the SERI desiccant test loop

    Microsoft Academic Search

    C. F. Kutscher; R. S. Barlow

    1982-01-01

    Discussed are the design and construction of a desiccant test loop and results of tests with a silica-gel-packed bed. The test loop consists of two centrifugal fans, two duct heaters, a steam humidifier, 24.4m (80 ft) of 30-cm (12-in.) circular duct, instrumentation, and a test section. The loop is capable of testing adsorption and desorption modes at flow rates up

  5. Testing for nonlinearity in time series: the method of surrogate data

    Microsoft Academic Search

    James Theder; Bryan Galdrikian; J. Doyne Farmer

    1992-01-01

    We describe a statistical approach for identifying nonlinearity in time series. The method first specifies some linear process as a null hypothesis, then generates surrogate data sets which are consistent with this null hypothesis, and finally computes a discriminating statistic for the original and for each of the surrogate data sets. If the value computed for the original data is

  6. Normal heartbeat series are nonchaotic, nonlinear, and multifractal: new evidence from semiparametric and parametric tests.

    PubMed

    Baillie, Richard T; Cecen, Aydin A; Erkal, Cahit

    2009-06-01

    We present new evidence that normal heartbeat series are nonchaotic, nonlinear, and multifractal. In addition to considering the largest Lyapunov exponent and the correlation dimension, the results of the parametric and semiparametric estimation of the long memory parameter (long-range dependence) unambiguously reveal that the underlying process is nonstationary, multifractal, and has strong nonlinearity. PMID:19566278

  7. Testing the impact of stratigraphic uncertainty on spectral analyses of sedimentary time series

    NASA Astrophysics Data System (ADS)

    Martinez, Mathieu; Kotov, Sergey; De Vleeschouwer, David; Pas, Damien; Vahlenkamp, Maximilian

    2015-04-01

    Spectral analysis has become a key tool for identifying the imprint of astronomical forcing on sedimentary records. In a next step, the identified cycles often contribute to the construction of a precise Geological Time Scale and to an in-depth understanding of past climate changes. Most of spectral analyses (Fast Fourier Transforms, the Multi-Taper Method…) require a constant sample step. Unfortunately, an equally spaced geological data series is, in practice, nearly impossible to obtain from field sedimentary series. Usually, there is a 10% uncertainty on the field measurements of the stratigraphic thickness within sedimentary series. Hence, important uncertainties exist in the actual position of each sample. Another source of uncertainty are errors in a time-space model. In this study, we explore the impact that the stratigraphic uncertainty on the sample position has on the result of spectral analyses. To simulate this uncertainty, we developed a model based on Monte Carlo randomisation of the distance between each successive point. In this way, the stratigraphic order of the data points is not affected after implementing this model. The application of this model to a theoretical sinusoid series and to several real sedimentary series shows that uncertainties in the actual position of samples can highly reduce the spectral powers of the frequencies ranging from the Nyquist Frequency up to 1/10 of the Nyquist Frequency. We then demonstrate that the precise reconstruction of the Milankovitch cycles in the sedimentary record requires a higher sampling density than previously suggested with, at least, 10 samples per thinnest cycle to be detected, i.e. 10 samples per precession cycle.

  8. Effects of the types of overlap on the mechanical properties of FSSW welded AZ series magnesium alloy joints

    NASA Astrophysics Data System (ADS)

    Wang, Dan; Shen, Jun; Wang, Lin-Zhi

    2012-03-01

    The effects of the types of overlap on the mechanical properties of the friction stir spot welding (FSSW) welded AZ series magnesium alloy joints were investigated by microstructural observations, microhardness tests, and tensile tests. The results show that the microstructure of the stir zone adjacent to the periphery of the rotating pin is mainly composed of the upper sheet. The average distance D between the longitudinal segment of the curved interface and the keyhole periphery, the tensile shear force, and the microhardness of the stir zone of the FSSW welded AZ61 alloy joint are the highest in all samples. During FSSW of AZ31 and AZ61 dissimilar magnesium alloys, the irregular deformation of the longitudinal segment of the curved interface appears, while the microhardness of the stir zone is higher when AZ61 alloy is the upper sheet. Moreover, the microhardness of the stir zone increases initially and then decreases sharply in the longitudinal test position.

  9. System size effects in the N/Z dependence of balance energy for isotopic series

    E-print Network

    Sakshi Gautam; Aman Deep Sood

    2011-07-25

    We study the system size effects in the N/Z dependence of balance energy for the isotopic series. We find drastic effect of symmetry energy on the N/Z dependence of E$_{bal}$ throughout the mass range. We also find that the N/Z dependence of E$_{bal}$ for isotopic series of lighter system is slightly more sensitive to symmetry energy as compared to that of heavier systems. We also study the mass dependence of E$_{bal}$ for the N/Z range from 1.0-2.0. We find that the mass dependence of E$_{bal}$ varies with the N/Z ratio.

  10. Sleep can reduce the testing effect -it enhances recall of restudied items but can leave recall of retrieved items

    E-print Network

    Schubart, Christoph

    Sleep can reduce the testing effect - it enhances recall of restudied items but can leave recall intervals include both wake and sleep delay, which can influence memory contents differently. In fact, sleep. We investigated in a series of 5 experiments whether sleep influences the testing effect. After

  11. Test blueprint: an effective visual support for test coverage

    Microsoft Academic Search

    Vanessa Peña Araya

    2011-01-01

    Test coverage is about assessing the relevance of unit tests against the tested application. It is widely acknowledged that a software with a “good” test coverage is more robust against unanticipated execution, thus lowering the maintenance cost. However, insuring a coverage of a good quality is challenging, especially since most of the available test coverage tools do not discriminate software

  12. J-2X Engine Ready For Second Test Series - Duration: 3 minutes, 55 seconds.

    NASA Video Gallery

    Time-lapse video of the installation of J-2X engine 10001 in the A-2 test-stand at Stennis, complete with clamshell assembly and nozzle extension. With these enhancements test engineers will measur...

  13. A Statistical Procedure for Assessing Test Dimensionality. Measurement Series 84-2.

    ERIC Educational Resources Information Center

    Stout, William

    An important problem in psychological test theory is the development of a sound method for determining whether a test which purports to measure the level of a certain ability is, in reality, significantly contaminated by one or more other abilities displayed by persons taking the test. Because of the large number of private and governmental…

  14. Design Automation of Test for the EX\\/9000TM Series Processors

    Microsoft Academic Search

    Brion L. Keller; David A. Haynes

    1991-01-01

    IBM tests each component, subassembly and system it manufactures in order to ensure that only a fully functioning, quality product is shipped to the customer. Most of the tests that are applied to these circuits are derived automatically by design automation software. This software has been developed and maintained over the last 20+ years by IBM's Test Design Automation group

  15. A Review of State Test Security Laws in 2013. ACT Research Report Series, 2014 (1)

    ERIC Educational Resources Information Center

    Croft, Michelle

    2014-01-01

    Test security has increased in importance in the last few years given high-profile cases of educator misconduct. This paper provides a review of state test security statutes and regulations related to statewide achievement testing using as a framework recent best practices reports by the U.S. Department of Education's National Center for Education…

  16. Movement-related effects in fMRI time-series

    Microsoft Academic Search

    K. J. Friston; S. R. Williams; R. Howard; R. S. J. Frackowiak; R. Turner

    1996-01-01

    Abstract This paper concerns the spatial and intensity transformations that are required to adjust for the confounding,effects of subject movement,during fMRI activation studies. We present an approach that models, and removes, movement-relatedartefacts from fMRI time-series. This approach is predicated on the ,observation ,that movement-related effects are extant even after perfect realignment. These effects can be divided into those that are

  17. Examining the Testing Effect with Open-and Closed-Book Tests

    E-print Network

    McDermott, Kathleen

    Examining the Testing Effect with Open- and Closed-Book Tests POOJA K. AGARWAL*, JEFFREY D. Louis, St. Louis, USA SUMMARY Two experiments examined the testing effect with open-book tests, in which students view notes and textbooks while taking the test, and closed-book tests, in which students take

  18. What Test Oracle Should I Use for Effective GUI Testing? Department of Computer Science

    E-print Network

    Memon, Atif M.

    What Test Oracle Should I Use for Effective GUI Testing? Atif Memon Department of Computer Science executed on the software. In this paper we show that the test oracle used during test- ing also contributes significantly to test effectiveness and cost. A test oracle is a mechanism that determines whether a software

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

    E-print Network

    Rothermel, Gregg

    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

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

    SciTech Connect

    Wilson, C.N.

    1990-06-01

    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.

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

    USGS Publications Warehouse

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

    2013-01-01

    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.

  2. Spencerport Central Schools More Effective Schools/Teaching Project Documents, Second Series.

    ERIC Educational Resources Information Center

    Spencerport Central Schools, NY.

    During the 1982-83 school year the Spencerport (New York) Central School District began a comprehensive project to study the effective schools research and its implications at all levels of a suburban school system. A leadership planning team (consisting of teachers, principals, and district personnel) participated in a series of workshops and…

  3. Original Contribution ISOMER-SPECIFIC CONTRACTILE EFFECTS OF A SERIES OF SYNTHETIC

    E-print Network

    Taber, Douglass

    Original Contribution ISOMER-SPECIFIC CONTRACTILE EFFECTS OF A SERIES OF SYNTHETIC F2-ISOPROSTANES ON RETINAL AND CEREBRAL MICROVASCULATURE XIN HOU,* L. JACKSON ROBERTS II,y FERNAND GOBEIL Jr.,z DOUGLAS F; Accepted 31 October 2003) Abstract--F2-isoprostanes (F2-IsoP's) are biologically active prostanoids formed

  4. NBER WORKING PAPER SERIES THE EFFECT OF PROVIDING PEER INFORMATION ON RETIREMENT SAVINGS

    E-print Network

    Haller, Gary L.

    NBER WORKING PAPER SERIES THE EFFECT OF PROVIDING PEER INFORMATION ON RETIREMENT SAVINGS DECISIONS excellent research assistance. Beshears acknowledges financial support from a National Science Foundation-000186). This research was also supported by the U.S. Social Security Administration through grant #19-F

  5. The Effect of Social Security on Private Savings: The Time Series Evidence

    Microsoft Academic Search

    Martin Feldstein

    1979-01-01

    This paper reviews the studies by Robert Barro, Michael Darby, and Alicia Munnell, as well as my own earlier time-series study and presents new estimates using the revised national income-account data. The basic estimates of each of the four studies point to an economically substantial effect that is very unlikely to have been observed by chance alone. Although including variables

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

    E-print Network

    Brewer, Carol

    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

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

    ERIC Educational Resources Information Center

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

    2010-01-01

    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,…

  8. Effect of Mg, Si and Cu content on the microstructure of dilute 6000 series aluminium alloys

    Microsoft Academic Search

    Aiza Jaafar; Azmi Rahmat; Zuhailawati Hussain; Ismail Zainol

    2011-01-01

    The effect of Mg, Si and Cu content on the microstructural development during ageing treatment of dilute 6000 series alloys have been investigated using transmission electron microscopy (TEM). Four dilute alloys were used in this study. These alloys were subjected to quenching and artificial ageing at 100°C, 185°C and 300°C. The microstructural developments of the precipitates formed were monitored by

  9. BIMA Memoranda Series #15 The Effect of Light Wind on Antenna 3

    E-print Network

    BIMA Memoranda Series #15 The Effect of Light Wind on Antenna 3 Stephen White University of Maryland July 25, 1991 Abstract It is well known that the drives on antenna 3 are presently unable afternoon antenna 3 may be pointing off the source (i.e., the source is outside the primary beam) for up

  10. BIMA Memoranda Series #15 The Effect of Light Wind on Antenna 3

    E-print Network

    BIMA Memoranda Series #15 The Effect of Light Wind on Antenna 3 Stephen White University of Maryland July 25, 1991 Abstract It is well known that the drives on antenna 3 that on a t* *ypical summer afternoon antenna 3 may be pointing off the source (i.e., the source is outside

  11. On Giving Test Takers a Choice among Constructive Response Items. LSAC Research Report Series.

    ERIC Educational Resources Information Center

    Wang, Xiang Bo

    The Law School Admission Council (LSAC) is currently investigating the feasibility and advisability of administering a computerized Law School Admission Test (LSAT). In this context, using data from the College Boards 1989 National Advanced Placement (AP) Chemistry Examination for 18,462 test takers and a survey of all AP Chemistry teachers in…

  12. Dynamic Testing with Tangible Electronics: Measuring Children's Change in Strategy Use with a Series Completion Task

    ERIC Educational Resources Information Center

    Resing, Wilma C. M.; Elliott, Julian G.

    2011-01-01

    Aims: This study sought to explore the use of a novel approach that incorporates dynamic testing and tangible electronics in the assessment of children's learning potential and strategy use. Sample: A total of 77 children with a mean age 8.9 years participated in the study; half of them were dynamically tested using graduate prompt techniques; the…

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

    ERIC Educational Resources Information Center

    Woodruff, David; Wu, Yi-Fang

    2012-01-01

    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;…

  14. Test Anxiety: Theory, Assessment, and Treatment. The Series in Clinical and Community Psychology.

    ERIC Educational Resources Information Center

    Spielberger, Charles D., Ed.; Vagg, Peter R., Ed.

    It is not surprising that a broad array of treatment programs have been developed to reduce test anxiety, since the consequences can be serious. The contributions in this volume review and evaluate the theory of test anxiety, its measurement, its manifestations, and possible treatments and their outcomes. The following chapters are included: (1)…

  15. Evaluation of Surrogate and Bootstrap Tests for Nonlinearity in Time Series

    Microsoft Academic Search

    Dimitris Kugiumtzis

    2008-01-01

    The validity of any test for nonlinearity based on resampling techniques depends heavily on the consistency of the generated resampled data to the null hypothesis of linear stochastic process. The surrogate data generating algorithms AAFT, IAAFT and STAP, as well as a residual-based bootstrap algorithm, all used for the randomization or bootstrap test for nonlinearity, are reviewed and their performance

  16. 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

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

    2012-01-01

    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…

  17. Operation distant plain. United States participation with Canada, Australia, and Great Britain in a non-nuclear experimental test series. Program and project description

    Microsoft Academic Search

    J. R. Kelso; C. N. Kingery; J. Choromokos

    1966-01-01

    Operation DISTANT PLAIN is the nickname given for the U. S. participation in a series of non-nuclear experiments to be conducted in Alberta, Canada during CY 1966-67 in connection with the Tripartite Technical Cooperation Program (TTCP). This test series is designed to provide experimental data utilizing explosives and detonable gas filled balloons for application to the solution of nuclear weapon

  18. Measurements of time average series resonance effect in capacitively coupled radio frequency discharge plasma

    SciTech Connect

    Bora, B.; Bhuyan, H.; Favre, M.; Wyndham, E.; Chuaqui, H. [Facultad de Fisica, Pontificia Universidad Catolica de Chile, Ave. Vicuna Mackenna 4860, Santiago 22 (Chile); Kakati, M. [Thermal Plasma Processed Materials Laboratory, Centre of Plasma Physics, Institute for Plasma Research, Sonapur 782 402, Assam (India)

    2011-10-15

    Self-excited plasma series resonance is observed in low pressure capacitvely coupled radio frequency discharges as high-frequency oscillations superimposed on the normal radio frequency current. This high-frequency contribution to the radio frequency current is generated by a series resonance between the capacitive sheath and the inductive and resistive bulk plasma. In this report, we present an experimental method to measure the plasma series resonance in a capacitively coupled radio frequency argon plasma by modifying the homogeneous discharge model. The homogeneous discharge model is modified by introducing a correction factor to the plasma resistance. Plasma parameters are also calculated by considering the plasma series resonances effect. Experimental measurements show that the self-excitation of the plasma series resonance, which arises in capacitive discharge due to the nonlinear interaction of plasma bulk and sheath, significantly enhances both the Ohmic and stochastic heating. The experimentally measured total dissipation, which is the sum of the Ohmic and stochastic heating, is found to increase significantly with decreasing pressure.

  19. 77 FR 15750 - Final Test Guidelines; OCSPP 810 Series; Notice of Availability

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-16

    ...clarifications from other guidance documents. In particular, data recommendations for testing against the spore formers Bacillus anthracis and Clostridium difficile have been added. List of Subjects Environmental protection, Antimicrobials,...

  20. Assessing error sources for Landsat time series analysis for tropical test sites in Viet Nam and Ethiopia

    NASA Astrophysics Data System (ADS)

    Schultz, Michael; Verbesselt, Jan; Herold, Martin; Avitabile, Valerio

    2013-10-01

    Researchers who use remotely sensed data can spend half of their total effort analysing prior data. If this data preprocessing does not match the application, this time spent on data analysis can increase considerably and can lead to inaccuracies. Despite the existence of a number of methods for pre-processing Landsat time series, each method has shortcomings, particularly for mapping forest changes under varying illumination, data availability and atmospheric conditions. Based on the requirements of mapping forest changes as defined by the United Nations (UN) Reducing Emissions from Forest Degradation and Deforestation (REDD) program, the accurate reporting of the spatio-temporal properties of these changes is necessary. We compared the impact of three fundamentally different radiometric preprocessing techniques Moderate Resolution Atmospheric TRANsmission (MODTRAN), Second Simulation of a Satellite Signal in the Solar Spectrum (6S) and simple Dark Object Subtraction (DOS) on mapping forest changes using Landsat time series data. A modification of Breaks For Additive Season and Trend (BFAST) monitor was used to jointly map the spatial and temporal agreement of forest changes at test sites in Ethiopia and Viet Nam. The suitability of the pre-processing methods for the occurring forest change drivers was assessed using recently captured Ground Truth and high resolution data (1000 points). A method for creating robust generic forest maps used for the sampling design is presented. An assessment of error sources has been performed identifying haze as a major source for time series analysis commission error.

  1. Statistical Test for Dynamical Nonstationarity in Observed Time-Series Data

    E-print Network

    Matthew B. Kennel

    1995-12-21

    Information in the time distribution of points in a state space reconstructed from observed data yields a test for ``nonstationarity''. Framed in terms of a statistical hypothesis test, this numerical algorithm can discern whether some underlying slow changes in parameters have taken place. The method examines a fundamental object in nonlinear dynamics, the geometry of orbits in state space, with corrections to overcome difficulties in real dynamical data which cause naive statistics to fail.

  2. Historical estimates of external gamma exposure and collective external gamma exposure from testing at the Nevada Test Site. I. Test series through HARDTACK II, 1958.

    PubMed

    Anspaugh, L R; Church, B W

    1986-07-01

    In 1959, the Test Manager's Committee to Establish Fallout Doses calculated estimated external gamma exposure at populated locations based upon measurements of external gamma-exposure rate. Using these calculations and estimates of population, we have tabulated the collective estimated external gamma exposures for communities within established fallout patterns. The total collective estimated external gamma exposure is 85,000 person-R. The greatest collective exposures occurred in three general areas: Saint George, UT; Ely, NV; and Las Vegas, NV. Three events, HARRY (19 May 1953), BEE (22 March 1955), and SMOKY (31 August 1957), accounted for more than half the total collective estimated external gamma exposure. The bases of the calculational models for external gamma exposure of "infinite exposure," "estimated exposure," and "1-yr effective biological exposure" are explained. PMID:3332000

  3. Power series representations for complex bosonic effective actions. I. A small field renormalization group step

    SciTech Connect

    Balaban, Tadeusz [Department of Mathematics, Rutgers, The State University of New Jersey, 110 Frelinghuysen Rd., Piscataway, New Jersey 08854-8019 (United States); Feldman, Joel [Department of Mathematics, University of British Columbia, Vancouver, British Columbia V6T 1Z2 (Canada); Knoerrer, Horst; Trubowitz, Eugene [Mathematik, ETH-Zentrum, CH-8092 Zuerich (Switzerland)

    2010-05-15

    We develop a power series representation and estimates for an effective action of the form: ln[{integral}e{sup f({alpha}{sub 1},...,{alpha}{sub s};z*,z)}d{mu}(z*,z)/{integral}e{sup f(0,...,0;z*,z)}d{mu}(z*,z)]. Here, f({alpha}{sub 1},...,{alpha}{sub s};z{sub *},z) is an analytic function of the complex fields {alpha}{sub 1}(x),...,{alpha}{sub s}(x), z{sub *}(x), z(x) indexed by x in a finite set X, and d{mu}(z*,z) is a compactly supported product measure. Such effective actions occur in the small field region for a renormalization group analysis. Using methods similar to a polymer expansion, we estimate the power series of the effective action.

  4. Using power series expansions of moduli to interpolate between release curves from dynamic tests: Technique and application

    SciTech Connect

    Furnish, M.D.

    1990-08-01

    Recently an appreciable number of continuous release profiles have been measured from dynamic experiments with geological materials. For each material an empirical generalization of the available release curves may be constructed to allow easy application of the experimental data to problems in much the same way as a linear shock velocity -- particle velocity fit allows easy application of Hugoniot data. This generalization is made in two steps. The first is to compute the Eulerian axial modulus at the Hugoniot pressure and its first three pressure derivatives along the release for each test. This corresponds to a partial Taylor series of the axial modulus, which integrates to give a very close match to the original release. An alternative formulation, which takes volume as the independent variable, fails because that Taylor series does not converge with the rapidity needed for these calculations. The second step is to plot each of these quantities against the Hugoniot pressure for the suite of tests, and fit these data. A release from an arbitrary pressure within the general range of the experimental data may be computed by using the interpolated modulus and its interpolated derivatives. This generalization, which allows volume to be computed as a function of pressure, reproduces the experimental curves fairly well. We present the results of applying this technique to release data for Mini Jade 2 grout, and briefly compare these results with those from several Nevada Test Site tuffs, saturated and dry Indiana Limestone, and aluminum. Finally, we use the generalized Mini Jade 2 data to solve a sample problem, that of estimating the error produced by making the release = Hugoniot'' assumption in the analysis of ground motion gauges in an underground test. 12 refs., 14 figs., 5 tabs.

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

    E-print Network

    Rothermel, Gregg

    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

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

    E-print Network

    Rothermel, Gregg

    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

  7. Multiple Choice Testing and the Retrieval Hypothesis of the Testing Effect

    ERIC Educational Resources Information Center

    Sensenig, Amanda E.

    2010-01-01

    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…

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

    ERIC Educational Resources Information Center

    Westrick, Paul A.; Allen, Jeff

    2014-01-01

    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…

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

    NASA Technical Reports Server (NTRS)

    Knight, Montgomery; Noyes, Richard

    1929-01-01

    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.

  10. PUBLISHED STANDARIZED TESTS - AN ANNOTATED LIST FOR JUNIOR COLLEGES. FIELD STUDIES REPORT SERIES, 3.

    ERIC Educational Resources Information Center

    SEIBEL, DEAN W.

    FROM THE CATALOGS AND OTHER DESCRIPTIVE MATERIALS OF 23 PUBLISHERS OF STANDARDIZED TESTS, THE AUTHOR SELECTED GROUP-TYPE, PAPER AND PENCIL, POST-HIGH SCHOOL LEVEL MEASUREMENT INSTRUMENTS. INFORMATION ABOUT EACH ENTRY INCLUDES (1) THE TITLE, (2) THE PUBLISHER, (3) WORKING TIME, (4) NUMBER OF EQUIVALENT FORMS, (5) A DESCRIPTION, (6) A REFERENCE…

  11. Interface test series: An in situ study of factors affecting the containment of hydraulic fractures

    Microsoft Academic Search

    N. R. Warpinski; S. J. Finley; W. C. Vollendorf; M. Obrien; E. Eshom

    1982-01-01

    In situ experiments, which are accessible for direct observation by mineback, were conducted to determine the effect that material-property interfaces and in situ stress differences have on hydraulic fracture propagation and the resultant overall geometry. These experiments show conclusively that a difference in elastic modulus at a geologic interface has little or no effect on crack growth and, therefore, is

  12. Effects of State Tests on Classroom Test Items in Mathematics

    ERIC Educational Resources Information Center

    Boyd, Brian T.

    2008-01-01

    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,…

  13. Optimal tests for rare variant effects in sequencing association studies

    E-print Network

    Lin, Xihong

    Optimal tests for rare variant effects in sequencing association studies Seunggeun Lee Department association tests. Common ap- proaches include burden and non-burden tests. Burden tests assume all rare. The recently proposed Sequence Kernel association Test (SKAT) [19] an extension of the C-alpha test [12

  14. Results from NNWSI [Nevada Nuclear Waste Storage Investigations] Series 2 bare fuel dissolution tests

    SciTech Connect

    Wilson, C.N.

    1990-09-01

    The dissolution and radionuclide release behavior of spent fuel in groundwater is being studied by the Nevada Nuclear Waste Storage Investigations (NNWSI) Project. Two bare spent fuel specimens plus the empty cladding hulls were tested in NNWSI J-13 well water in unsealed fused silica vessels under ambient hot cell air conditions (25{degree}C) in the currently reported tests. One of the specimens was prepared from a rod irradiated in the H. B. Robinson Unit 2 reactor and the other from a rod irradiated in the Turkey Point Unit 3 reactor. Results indicate that most radionuclides of interest fall into three groups for release modeling. The first group principally includes the actinides (U, Np, Pu, Am, and Cm), all of which reached solubility-limited concentrations that were orders of magnitude below those necessary to meet the NRC 10 CFR 60.113 release limits for any realistic water flux predicted for the Yucca Mountain repository site. The second group is nuclides of soluble elements such as Cs, Tc, and I, for which release rates do not appear to be solubility-limited and may depend on the dissolution rate of fuel. In later test cycles, {sup 137}Cs, {sup 90}Sr, {sup 99}Tc, and {sup 129}I were continuously released at rates between about 5 {times} 10{sup {minus}5} and 1 {times} 10{sup {minus}4} of inventory per year. The third group is radionuclides that may be transported in the vapor phase, of which {sup 14}C is of primary concern. Detailed test results are presented and discussed. 17 refs., 15 figs., 21 tabs.

  15. Effects of engine thermal transients on the energy management of series hybrid solar vehicles

    Microsoft Academic Search

    Ivan Arsie; Gianfranco Rizzo; Marco Sorrentino

    2010-01-01

    The paper focuses on investigating thermal-transients effects, associated to intermittent use of internal combustion engine (ICE), on fuel economy and hydrocarbon (HC) emissions of series hybrid solar vehicles (HSVs). An offline, non-linear constrained optimization is set-up to individuate the ICE power trajectory that simultaneously minimizes fuel consumption, suitably operates the battery and fully exploits daily solar contribution. The results highlight

  16. Testing the hypothesis that treatments have negligible effects: Minimum-effect tests in the general linear model

    Microsoft Academic Search

    Kevin R. Murphy; Brett Myors

    1999-01-01

    Researchers are often interested in testing the hypothesis that the effects of treatments, interventions, and so on are negligibly small rather than testing the hypothesis that treatments have no effect whatsoever. A number of procedures for conducting such tests have been suggested but have yet to be widely adopted. In this article, simple methods of testing such minimum-effect hypotheses are

  17. Effect of restart at signals on traffic flow through a series of signals

    NASA Astrophysics Data System (ADS)

    Hino, Yuki; Tobita, Kazuhiro; Nagatani, Takashi

    2013-08-01

    We study the effect of restart at signals on the vehicular traffic controlled by a series of signals. The Nagel-Schreckenberg model (NS model) and Fukui-Ishibashi model (FI model) are applied to the vehicular motion. In the FI model, the step-by-step acceleration is not taken into account but the acceleration effect is included in the NS model. It is shown that the difference between both models results in the restart effect at signals. The extended version of the NS model with signals is formulated by the difference equation. The restart at signals has an effective effect on the traffic flow. The fundamental diagram changes highly by the restart effect. The dependences of mean speed on the cycle time are shown.

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

    NASA Technical Reports Server (NTRS)

    Adell, Philippe; Allen, Gregory

    2013-01-01

    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

  19. On Test Suite Composition and Cost-Effective Regression Testing Gregg Rothermel

    E-print Network

    Rothermel, Gregg

    On Test Suite Composition and Cost-Effective Regression Testing Gregg Rothermel , Sebastian Elbaum}@cse.unl.edu August 31, 2004 Abstract Regression testing is an expensive testing process used to re-validate software as it evolves. Various methodologies for improving regression testing processes have been explored, but the cost

  20. On Test Suite Composition and Cost-Effective Regression Testing. Gregg Rothermel

    E-print Network

    Rothermel, Gregg

    On Test Suite Composition and Cost-Effective Regression Testing. Gregg Rothermel , Sebastian Elbaum}@cse.unl.edu August 30, 2003 Abstract Regression testing is an expensive testing process used to re-validate software as it evolves. Various methodologies for improving regression testing processes have been explored, but the cost

  1. DIRECTORY OF SHORT TERM TESTS FOR HEALTH AND ECOLOGICAL EFFECTS

    EPA Science Inventory

    The directory provides basic information on the short term tests for health and ecological effects being performed by various U.S. EPA Laboratories through the Office of Health and Ecological Effects. The test systems are cross-indexed....

  2. Correcting the hooking effect in satellite altimetry data for time series estimation over smaller rivers

    NASA Astrophysics Data System (ADS)

    Boergens, Eva; Dettmering, Denise; Schwatke, Christian

    2015-04-01

    Since many years the numbers of in-situ gauging stations are declining. Satellite altimetry can be used as a gap-filler even over smaller inland waters like rivers. However, since altimetry measurements are not designed for inland water bodies a special data handling is necessary in order to estimate reliable water level heights over inland waters. We developed a new routine for estimating water level heights over smaller inland waters with satellite altimetry by correcting the hooking effect. The hooking effect occurs when the altimeter is not measuring in nadir before and after passing a water body due to the stronger reflectance of the water than the surrounding land surface. These off-nadir measurements, together with the motion of the satellite, lead to overlong ranges and heights declining in a parabolic shape. The vertex of this parabola is on the water surface. Therefore, by estimating the parabola we are able to determine the water level height without the need of any point over the water body itself. For estimating the parabola we only use selected measurements which are effected by the hooking effect. The applied search approach is based on the RANSAC algorithm (random sample consensus) which is a non-deterministic algorithm especially designed for finding geometric entities in point clouds with many outliers. With the hooking effect correction we are able to retrieve water level height time series from the Mekong River from Envisat and Saral/Altika high frequency data. It is possible to determine reliable time series even if the river has only a width of 500m or less. The expected annual variations are clearly depicted and the comparison of the time series with available in-situ gauging data shows a very good agreement.

  3. Effective topical combination therapy for treatment of lichen striatus in children: a case series and review.

    PubMed

    Youssef, Sherry M; Teng, Joyce M C

    2012-07-01

    Lichen striatus (LS) is an uncommon linear dermatosis that is primarily seen in children from 4 months to 15 years of age. While some of these eruptions are asymptomatic, others can be quite pruritic. In darker-skinned individuals, post-inflammatory hypopigmentation can be significant and may provide a cause for concern for the patients and/or their parents. In our case series of 4 patients, we observed rapid resolution of LS by combining a topical retinoid with a topical steroid. To our knowledge, this is the first report of successful treatment with this kind of combination therapy in the English literature. The patients not only achieved satisfying cosmesis, but also complete resolution of their pruritus. The most common side effect of topical tazarotene is localized irritation at treatment sites, but the patients in this particular series tolerated the treatment well. PMID:22777233

  4. Historical estimates of external gamma exposure and collective external gamma exposure from testing at the Nevada Test Site. II. Test series after Hardtack II, 1958, and summary

    Microsoft Academic Search

    Lynn R. Anspaugh; Yvonne E. Ricker; Stuart C. Black; R. Frank Grossman; David L. Wheeler; Bruce W. Church; Virgil E. Quinn

    1990-01-01

    The historical data on the cumulative individual external gamma exposures are tabulated for communities around the Nevada Test Site for the time periods of 1961 to the signing of the Limited Test Ban Treaty on 5 August 1963, and from then until 1975. The collective exposures during the two time periods are calculated to be 610 and 320 person-R, respectively.

  5. Concentrating photovoltaic multijunction (CPVM) module electrical layout optimisation by a new theoretical and experimental “mismatch” analysis including series resistance effects

    Microsoft Academic Search

    A. Minuto; G. Timo; P. Groppelli; M. Sturm

    2010-01-01

    A new theoretical and experimental `current mismatch' analysis of CPVM modules, including series resistance effects, is proposed. It allows predicting the I-V curve and the maximum power point of the module, considering its series resistance value and a given mismatch condition, for all the possible circuital module topologies having a fixed number of Multi-junction (MJ) solar cells. The optimum module

  6. Sediment bioaccumulation test with Lumbriculus variegatus: Effects of feeding

    EPA Science Inventory

    Sediment bioaccumulation tests with Lumbriculus variegatus were performed on seven sediments with a series of ratios of total organic carbon in sediment to L. variegatus (dry weight) (TOC/Lv) that spanned the recommendation of no less than 50:1. With increasing loading of organi...

  7. Testing the effectiveness of monolayers under wind and wave conditions.

    PubMed

    Palada, C; Schouten, P; Lemckert, C

    2012-01-01

    Monolayers are highly desirable for their evaporation reducing capabilities due to their relatively minimal cost and ease of application. Despite these positive attributes, monolayers have consistently failed to perform effectively due to the harsh wind and wave conditions prevalent across real-world water reserves. An exhaustive and consistent study testing the influence of wind and wave combinations on monolayer performance has yet to be presented in the literature. To remedy this, the effect of simultaneous wind and wave conditions on a benchmark high-performance monolayer (octadecanol suspension, CH(3)(CH(2))(16)CH(2)OH) has been analysed. Subjected only to waves, the monolayer remained intact due to its innate ability to compress and expand. However, the constant simultaneous application of wind and waves caused the monolayer to break up and gather down-wind where it volatilised over time. At wind speeds above 1.3 m s(-1) the monolayer was completely ineffective. For wind speeds below this threshold, the monolayer had an influence on the evaporation rate dependent on wind speed. From these results a series of application protocols can now be developed for the optimised deployment of monolayers in real-world water reserves. This will be of interest to private, commercial and government organisations involved in the storage and management of water resources. PMID:22378014

  8. 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

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

    2001-07-01

    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.

  9. On Granger causality and the effect of interventions in time series.

    PubMed

    Eichler, Michael; Didelez, Vanessa

    2010-01-01

    We combine two approaches to causal reasoning. Granger causality, on the one hand, is popular in fields like econometrics, where randomised experiments are not very common. Instead information about the dynamic development of a system is explicitly modelled and used to define potentially causal relations. On the other hand, the notion of causality as effect of interventions is predominant in fields like medical statistics or computer science. In this paper, we consider the effect of external, possibly multiple and sequential, interventions in a system of multivariate time series, the Granger causal structure of which is taken to be known. We address the following questions: under what assumptions about the system and the interventions does Granger causality inform us about the effectiveness of interventions, and when does the possibly smaller system of observable times series allow us to estimate this effect? For the latter we derive criteria that can be checked graphically and are in the same spirit as Pearl's back-door and front-door criteria (Pearl 1995). PMID:19941069

  10. OBIT DEVELOPMENT MEMO SERIES NO. 13 1 Effects of Baseline Dependent Time Averaging of

    E-print Network

    Groppi, Christopher

    . This memo explores some of the imaging effects of time averaging the data in a baseline dependent fashion in the image of 0.3%. Upper limits on the averaging time short enough to allow self calibration (15 sec.) do and imaged in order to evaluate the imaging effects of the averaging. Further tests were made to determine

  11. Nontidal ocean loading: amplitudes and potential effects in GPS height time series

    NASA Astrophysics Data System (ADS)

    van Dam, T.; Collilieux, X.; Wuite, J.; Altamimi, Z.; Ray, J.

    2012-11-01

    Ocean bottom pressure (OBP) changes are caused by a redistribution of the ocean's internal mass that are driven by atmospheric circulation, a change in the mass entering or leaving the ocean, and/or a change in the integrated atmospheric mass over the ocean areas. The only previous global analysis investigating the magnitude of OBP surface displacements used older OBP data sets (van Dam et al. in J Geophys Res 129:507-517, 1997). Since then significant improvements in meteorological forcing models used to predict OBP have been made, augmented by observations from satellite altimetry and expendable bathythermograph profiles. Using more recent OBP estimates from the Estimating the Circulation and Climate of the Ocean (ECCO) project, we reassess the amplitude of the predicted effect of OBP on the height coordinate time series from a global distribution of GPS stations. OBP-predicted loading effects display an RMS scatter in the height of between 0.2 and 3.7 mm, larger than previously reported but still much smaller (by a factor of 2) than the scatter observed due to atmospheric pressure loading. Given the improvement in GPS hardware and data analysis techniques, the OBP signal is similar to the precision of weekly GPS height coordinates. We estimate the effect of OBP on GPS height coordinate time series using the MIT reprocessed solution, mi1. When we compare the predicted OBP height time series with mi1, we find that the scatter is reduced over all stations by 0.1 mm on average with reductions as high as 0.7 mm at some stations. More importantly we are able to reduce the scatter on 65 % of the stations investigated. The annual component of the OBP signal is responsible for 80 % of the reduction in scatter on average. We find that stations located close to semi-enclosed bays or seas are affected by OBP loading to a greater extent than other stations.

  12. Investigating a computerised test of the Stroop effect extended by inclusion of a third, more difficult task.

    PubMed

    Federmann, Rolf; Goldsmith, Robert; Bäckström, Martin

    2007-04-01

    A validation study of a computerised test recently developed involving the Stroop effect, extended here by inclusion of a third, more difficult test series, is presented. Three groups of men belonging to the Swedish armed forces and adjudged to differ in their qualifications (20, 32, and 19 men of levels 1, 2, and 3, respectively) and a fourth group of 18 men convicted of serious crimes of violence were given this test, termed the Stress Strategy Test. Discriminant analysis of the test's 12 variables (four for each of the three test series) yielded a discriminant power of 65% for the total group, highest for the level 1 group (80%) and for the nonmilitary group (72%), results substantially better than obtained for the original version of the test with use of similar subject groups. PMID:17566434

  13. N-Arylmethylaminoquercitols, a new series of effective antidiabetic agents having ?-glucosidase inhibition and antioxidant activity.

    PubMed

    Worawalai, Wisuttaya; Wacharasindhu, Sumrit; Phuwapraisirisan, Preecha

    2015-06-15

    A new series of N-arylalkylaminoquercitols were synthesized by reductive amination of aminoquercitol bisacetonide 5 and a variety of aryl aldehydes. The targeted N-substituted aminoquercitols having phenolic moiety (7a-7c) displayed significantly enhanced ?-glucosidase inhibition, which is 26-32 times more potent than that of the unmodified aminoquercitol 6. In addition, compounds 7a-7c also retained antioxidant activity with relatively more pronounced potency than their original phenolics. This recent finding suggests an approach to develop effective antidiabetic agents by incorporating antioxidative moiety into aminocyclitol core structure. PMID:25959812

  14. Power Series Introduction

    E-print Network

    Vickers, James

    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

  15. Demonstration of anticoagulation patient self-testing feasibility at an Indian Health Service facility: A case series analysis

    PubMed Central

    Schupbach, Ryan R.; Bousum, John M.; Miller, Michael J.

    Background Anticoagulation patient self-testing (PST) represents an alternative approach to warfarin monitoring by enabling patients to use coagulometers to test their international normalized ratio (INR) values. PST offers several advantages that potentially improve warfarin management. Objective To describe implementation and associated performance of a PST demonstration program at an Indian Health Service (IHS) facility. Methods A non-consecutive case series analysis of patients from a pharmacy-managed PST demonstration program was performed at an IHS facility in Oklahoma between July 2008 and February 2009. Results Mean time in therapeutic range (TTR) for the seven patients showed a small, absolute increase during the twelve weeks of PST compared to the twelve weeks prior to PST. Four of the seven patients had an increase in TTR during the twelve week course of PST compared to their baseline TTR. Three of four patients with increased TTR in the final eight week period of PST achieved a TTR of 100%. Of the three patients who experienced a decrease in TTR after initiating self-testing, two initially presented with a TTR of 100% prior to PST and one patient had a TTR of 100% for the final eight weeks of PST. The two patients not achieving a TTR of 100% during the twelve week PST period demonstrated an increase in TTR following the first four weeks of PST. Conclusions Although anticoagulation guidelines now emphasize patient self-management (PSM) only, optimal PST remains an integral process in PSM delivery. In the patients studied, the results of this analysis suggest that PST at the IHS facility provided a convenient, alternative method for management of chronic warfarin therapy for qualified patients. More than half of the patients demonstrated improvement in TTR. Although there is a learning curve immediately following PST initiation, the mean TTR for the entire PST period increased modestly when compared to the time period prior to PST. PMID:24155847

  16. The Effects of Different Test-Taking Conditions on Reading Comprehension Test Performance.

    ERIC Educational Resources Information Center

    Bishop, N. Scott; Frisbie, David A.

    Prior research has shown that test takers use a variety of strategies when taking passage-based reading comprehension tests. The specific effects that these alternative strategies have on actual examinee test performance are largely unknown. Evidence suggesting that performance differences exist across testing conditions would imply that the…

  17. The Use of Equivalence Testing in Conjunction with Standard Hypothesis Testing and Effect Sizes.

    ERIC Educational Resources Information Center

    Mecklin, Christopher J.

    Whether one should use null hypothesis testing, confidence intervals, and/or effect sizes is a source of continuing controversy in educational research. An alternative to testing for statistical significance, known as equivalence testing, is little used in educational research. Equivalence testing is useful in situations where the researcher…

  18. Effect of test position on pelvic floor muscle assessment

    Microsoft Academic Search

    Helena C. Frawley; Mary P. Galea; Bev A. Phillips; Margaret Sherburn; Kari Bø

    2006-01-01

    The aims of this study were to analyse the effect of different body positions on pelvic floor muscle (PFM) assessment using digital muscle testing, manometry and transabdominal ultrasound. In addition, subject acceptance of each testing position was recorded. Subjects were 20 women's health physiotherapists. The testing protocol included the best of three maximum voluntary contractions tested in each of four

  19. Neuroleptic effects on neuropsychological test performance in schizophrenia

    Microsoft Academic Search

    Hélène Verdoux; Edith Magnin; Marc Bourgeois

    1995-01-01

    The present study assessed the effects of neuroleptic medication on tests sensitive to frontal and non-frontal lobe function in schizophrenic patients. A test-retest design before and after initiation of neuroleptic treatment was used. The performance of schizophrenics was compared with that of matched normal controls. Schizophrenics performed more poorly than controls on most tests at both first and second testing.

  20. Effects of Coaching on GRE Aptitude Test Scores.

    ERIC Educational Resources Information Center

    Powers, Donald E.

    1985-01-01

    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)

  1. Compendium of Test Results of Recent Single Event Effect Tests Conducted by the Jet Propulsion Laboratory

    NASA Technical Reports Server (NTRS)

    McClure, Steven S.; Allen, Gregory R.; Irom, Farokh; Scheick, Leif Z.; Adell, Philippe C.; Miyahira, Tetsuo F.

    2010-01-01

    This paper reports heavy ion and proton-induced single event effect (SEE) results from recent tests for a variety of microelectronic devices. The compendium covers devices tested over the last two years by the Jet Propulsion Laboratory.

  2. Historical estimates of external gamma exposure and collective external gamma exposure from testing at the Nevada Test Site. I. Test series through HARDTACK II, 1958

    Microsoft Academic Search

    Lynn R. Anspaugh; Bruce W. Church

    1986-01-01

    In 1959, the Test Manager's Committee to Establish Fallout Doses calculated estimated external gamma exposure at populated locations based upon measurements of external gamma-exposure rate. Using these calculations and estimates of population, we have tabulated the collective estimated external gamma exposures for communities within established fallout patterns. The total collective estimated external gamma exposure is 85,000 person-R. The greatest collective

  3. Data report on the Waste Isolation Pilot Plant Small-Scale Seal Performance Test, Series F grouting experiment

    SciTech Connect

    Ahrens, E.H. [Sandia National Labs., Albuquerque, NM (United States)] [Sandia National Labs., Albuquerque, NM (United States); Dale, T.F.; Van Pelt, R.S. [INTERA, Inc., Austin, TX (United States)] [INTERA, Inc., Austin, TX (United States)

    1996-03-01

    SSSPT-F was designed to evaluate sealing materials at WIPP. It demonstrated: (1) the ability to practically and consistently produce ultrafine cementitious grout at the grouting site, (2) successful, consistent, and efficient injection and permeation of the grout into fractured rock at the repository horizon, (3) ability of the grout to penetrate and seal microfractures, (4) procedures and equipment used to inject the grout. Also techniques to assess the effectiveness of the grout in reducing the gas transmissivity of the fractured rock were evaluated. These included gas-flow/tracer testing, post-grout coring, pre- and post-grout downhole televiewer logging, slab displacement measurements, and increased loading on jacks during grout injection. Pre- and post-grout diamond drill core was obtained for use in ongoing evaluations of grouting effectiveness, degradation, and compatibility. Diamond drill equipment invented for this test successfully prevented drill cuttings from plugging fractures in grout injection holes.

  4. 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

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

    1990-12-01

    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.

  5. Power series representations for complex bosonic effective actions. II. A small field renormalization group flow

    SciTech Connect

    Balaban, Tadeusz [Department of Mathematics Rutgers, State University of New Jersey, 110 Frelinghuysen Rd., Piscataway, New Jersey 08854-8019 (United States); Feldman, Joel [Department of Mathematics, University of British Columbia, Vancouver, British Columbia V6T 1Z2 (Canada); Knoerrer, Horst; Trubowitz, Eugene [Mathematik, ETH-Zentrum, CH-8092 Zurich (Switzerland)

    2010-05-15

    In a previous paper, we developed a power series representation and estimates for an effective action of the form ln[{integral}e{sup f({alpha}{sub 1},...,{alpha}{sub s};z*,z)}d{mu}(z*,z)/{integral}e{sup f(0,...,0;z*,z)}d{mu}(z*,z)]. Here, f({alpha}{sub 1},...,{alpha}{sub s};z{sub *},z) is an analytic function of the complex fields {alpha}{sub 1}(x),...,{alpha}{sub s}(x),z{sub *}(x),z(x) indexed by x in a finite set X and d{mu}(z*,z) is a compactly supported product measure. Such effective actions occur in the small field region for a renormalization group analysis. We illustrate the technique by a model renormalization group flow motivated by the ultraviolet regime in many boson systems.

  6. Jet Propulsion Laboratory Environmental Verification Processes and Test Effectiveness

    NASA Technical Reports Server (NTRS)

    Hoffman, Alan R.; Green, Nelson W.

    2006-01-01

    Viewgraphs on the JPL processes for enviornmental verification and testing of aerospace systems is presented. The topics include: 1) Processes: a) JPL Design Principles b) JPL Flight Project Practices; 2) Environmental Verification; and 3) Test Effectiveness Assessment: Inflight Anomaly Trends.

  7. Multiple Hypothesis Testing by Clustering Treatment Effects

    Microsoft Academic Search

    David B. Dahl; Michael A. Newton

    2007-01-01

    Multiple hypothesis testing and clustering have been the subject of extensive research in high-dimensional inference, yet these problems usually have been treated separately. By defining true clusters in terms of shared parameter values, we could improve the sensitivity of individual tests, because more data bearing on the same parameter values are available. We develop and evaluate a hybrid methodology that

  8. Assessing the Effects of District Testing and Evaluation Efforts.

    ERIC Educational Resources Information Center

    Mitroff, Donna

    The effects of a school district's testing and evaluation activities cannot be effectively assessed without an understanding of the explicit and implicit goals embedded in the policies and practices of the district. A structured workshop process to elicit a district's intentions related to the effects--uses and impacts--of testing and evaluation…

  9. Historical estimates of external gamma exposure and collective external gamma exposure from testing at the Nevada Test Site. II. Test series after Hardtack II, 1958, and summary.

    PubMed

    Anspaugh, L R; Ricker, Y E; Black, S C; Grossman, R F; Wheeler, D L; Church, B W; Quinn, V E

    1990-11-01

    The historical data on the cumulative individual external gamma exposures are tabulated for communities around the Nevada Test Site for the time periods of 1961 to the signing of the Limited Test Ban Treaty on 5 August 1963, and from then until 1975. The collective exposures during the two time periods are calculated to be 610 and 320 person-R, respectively. The total collective external gamma exposure from 1951 through 1975 for these communities s calculated to be 86,000 person-R. The area considered includes the countries of Clark, Lincoln, Nye, and White Pine in Nevada and the countries of Iron and Washington in Utah; inclusion of Salt Lake City would have substantially increased the calculated collective exposure because of the large population. The methods of calculation are reviewed. Also, the historical data on the assessment of dose via ingestion are reviewed with emphasis on the dose to the thyroid of infants living in St. George, UT, at the time of fallout from event HARRY on 19 May 1953. PMID:2211112

  10. Test Series on the Influence of Talking Heads on the Quality of a Smart Home System - Experimental Outline and First Results

    Microsoft Academic Search

    Christine Kühnel; Benjamin Weiss; Ina Wechsung

    In this paper a series of four user studies on the evaluation of talking heads in the smart home domain is outlined. Results of the first two experiments are reported. The findings of the first user study, a watching-and-listening-only test is verified through the second test, a web-based experiment. Both studies link three talking head components to two open source

  11. 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

    Huitema, Bradley E.; McKean, Joseph W.

    2007-01-01

    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…

  12. Cost effective dynamic design and test requirements for Shuttle payloads

    NASA Technical Reports Server (NTRS)

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

    1975-01-01

    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.

  13. Effects of a Dynamic Progressive Orthotic Intervention for Chronic Hemiplegia: A Case Series

    PubMed Central

    Doucet, Barbara M.; Mettler, Joni A.

    2014-01-01

    Study Design: Case series design on a single subgroup of participants Introduction: Management of hypertonicity and resistance to passive movement (RTPM) in the upper extremity is an intractable problem for persons with stroke and the therapists who provide their care. Therapists have limited options for assessment and treatment of this condition which can profoundly limit functional performance and quality of life. Purpose of the Study: To evaluate the effect of a 12-week dynamic progressive orthotic intervention in persons with chronic stroke exhibiting wrist flexion contracture who are residents of a long term skilled nursing facility. Methods: A custom fitted dynamic progressive wrist extension orthotic was applied to 6 residents with chronic stroke. The orthotic was worn for 4 hours daily, 4X/week for 12 weeks. Wrist passive range of motion (PROM) and RTPM were measured weekly and after discontinuation of the orthotics using the Modified Ashworth Scale and the Tardieu Scale of Spasticity. Signal analysis of electromyographical (EMG) flexor response to extensor stretching was also measured before and after orthotic intervention using maximal root mean square (RMS) values and EMG burst onset time. Results: A moderate effect was found for changes in PROM with the orthotic intervention. Progress made diminished following discontinuation. Moderate effects were also seen in EMG measures which indicated increases in amount of resistive-free movement following intervention. Conclusions: A dynamic progressive orthotic intervention can be an effective option for increasing wrist PROM and reducing RTPM in persons with chronic stroke. Level of Evidence: 4 PMID:23149271

  14. Testing the Validity of Cost-Effectiveness Models

    E-print Network

    Oakley, Jeremy

    Testing the Validity of Cost-Effectiveness Models Chris McCabe and Simon Dixon Sheffield Health . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501 1. Review of Previous Attempts to Establish Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503 1.2 Validating Cost-Effectiveness Models

  15. Using Cost-Effectiveness Tests to Design CHP Incentive Programs

    SciTech Connect

    Tidball, Rick [ICF International

    2014-11-01

    This paper examines the structure of cost-effectiveness tests to illustrate how they can accurately reflect the costs and benefits of CHP systems. This paper begins with a general background discussion on cost-effectiveness analysis of DER and then describes how cost-effectiveness tests can be applied to CHP. Cost-effectiveness results are then calculated and analyzed for CHP projects in five states: Arkansas, Colorado, Iowa, Maryland, and North Carolina. Based on the results obtained for these five states, this paper offers four considerations to inform regulators in the application of cost-effectiveness tests in developing CHP programs.

  16. Time series analysis of air pollution and mortality: effects by cause, age and socioeconomic status

    PubMed Central

    Gouveia, N.; Fletcher, T.

    2000-01-01

    OBJECTIVE—To investigate the association between outdoor air pollution and mortality in São Paulo, Brazil.?DESIGN—Time series study?METHODS—All causes, respiratory and cardiovascular mortality were analysed and the role of age and socioeconomic status in modifying associations between mortality and air pollution were investigated. Models used Poisson regression and included terms for temporal patterns, meteorology, and autocorrelation.?MAIN RESULTS—All causes all ages mortality showed much smaller associations with air pollution than mortality for specific causes and age groups. In the elderly, a 3-4% increase in daily deaths for all causes and for cardiovascular diseases was associated with an increase in fine particulate matter and in sulphur dioxide from the 10th to the 90th percentile. For respiratory deaths the increase in mortality was higher (6%). Cardiovascular deaths were additionally associated with levels of carbon monoxide (4% increase in daily deaths). The associations between air pollutants and mortality in children under 5 years of age were not statistically significant. There was a significant trend of increasing risk of death according to age with effects most evident for subjects over 65 years old. The effect of air pollution was also larger in areas of higher socioeconomic level.?CONCLUSIONS—These results show further evidence of an association between air pollution and mortality but of smaller magnitude than found in other similar studies. In addition, it seems that older age groups are at a higher risk of mortality associated with air pollution. Such complexity should be taken into account in health risk assessment based on time series studies.???Keywords: air pollution; mortality; socioeconomic status PMID:10990478

  17. 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)

    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

    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.

  18. Bond Testing for Effects of Silicone Contamination

    NASA Technical Reports Server (NTRS)

    Plaia, James; Evans, Kurt

    2005-01-01

    In 2003 ATK Thiokol discovered that the smocks and coveralls worn by its operations personnel for safety and contamination control were themselves contaminated with a silicone defoamer and a silicone oil. As a growing list of items have been identified as having this form of contamination, it was desirable to devise a test method to determine if the contamination level detected could cause subsequent processing concerns. The smocks and coveralls could potentially contact bonding surfaces during processing so the test method focused on dry transfer of the silicone from the clothing to the bonding surface.

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

    NASA Astrophysics Data System (ADS)

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

    2015-01-01

    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.

  20. Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes

    E-print Network

    Hayes, Jane E.

    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

  1. The Impact of Concurrent Coverage Metrics on Testing Effectiveness

    E-print Network

    The Impact of Concurrent Coverage Metrics on Testing Effectiveness Shin Hong, Matt Staats, Jaemin. While a large body of evidence exists exploring the impact of structural coverage metrics on testing of Computer Science University of Nebraska-Lincoln Lincoln, NE grother@cse.unl.edu Abstract--When testing

  2. The Testing Effect for Learning Principles and Procedures from Texts

    ERIC Educational Resources Information Center

    Dirkx, Kim J. H.; Kester, Liesbeth; Kirschner, Paul A.

    2014-01-01

    The authors explored whether a testing effect occurs not only for retention of facts but also for application of principles and procedures. For that purpose, 38 high school students either repeatedly studied a text on probability calculations or studied the text, took a test on the content, restudied the text, and finally took the test a second…

  3. The effect of schooling and ability on achievement test scores

    Microsoft Academic Search

    Karsten T. Hansen; James J. Heckman; K. J. Kathleen J. Mullen

    2004-01-01

    This paper develops two methods for estimating the effect of schooling on achievement test scores that control for the endogeneity of schooling by postulating that both schooling and test scores are generated by a common unobserved latent ability. These methods are applied to data on schooling and test scores. Estimates from the two methods are in close agreement. We find

  4. The Effect of Schooling and Ability on Achievement Test Scores

    Microsoft Academic Search

    Karsten T. Hansen; James J. Heckman; Kathleen J. Mullen

    2003-01-01

    This paper develops two methods for estimating the effect of schooling on achievement test scores that control for the endogeneity of schooling by postulating that both schooling and test scores are generated by a common unobserved latent ability. These methods are applied to data on schooling and test scores. Estimates from the two methods are in close agreement. We find

  5. The Testing Effect on Skills Learning Might Last 6 Months

    ERIC Educational Resources Information Center

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

    2010-01-01

    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…

  6. Including the Effects of Future Tests in Aircraft Structural Design

    Microsoft Academic Search

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

    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

  7. An Experimental Comparison of the Effectiveness of Branch Testing and Data Flow Testing

    Microsoft Academic Search

    Phyllis G. Frankl; Stewart N. Weiss

    1993-01-01

    An experiment comparing the effectiveness of the all-uses and all-edges test data adequacy criteria was performed. The experiment was designed so as to overcome some of the deE- eieneies of previous software testing experiments. A large number of test sets was randomly generated for each of nine subject programs with subtle errors. For each test set, the percentages of executable

  8. Effects of Instructional Backgrounds on Test Performances.

    ERIC Educational Resources Information Center

    Tatsuoka, Kikumi; Birenbaum, Menucha

    1981-01-01

    Discusses an adaptive diagnostic test used as part of an instructional program in signed-number arithmetic on the PLATO system. Findings indicated that differences in prior and subsequent instructional methods affected the learning of more advanced materials and produced lower achievement scores on posttests. Thirty-two references are listed. (MER)

  9. Effects of Incorporating Humor in Test Items.

    ERIC Educational Resources Information Center

    McMorris, Robert F.; And Others

    1985-01-01

    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)

  10. A simulated lightning effects test facility for testing live and inert missiles and components

    NASA Technical Reports Server (NTRS)

    Craven, Jeffery D.; Knaur, James A.; Moore, Truman W., Jr.; Shumpert, Thomas H.

    1991-01-01

    Details of a simulated lightning effects test facility for testing live and inert missiles, motors, and explosive components are described. The test facility is designed to simulate the high current, continuing current, and high rate-of-rise current components of an idealized direct strike lightning waveform. The Lightning Test Facility was in operation since May, 1988, and consists of: 3 separate capacitor banks used to produce the lightning test components; a permanently fixed large steel safety cage for retaining the item under test (should it be ignited during testing); an earth covered bunker housing the control/equipment room; a charge/discharge building containing the charging/discharging switching; a remotely located blockhouse from which the test personnel control hazardous testing; and interconnecting cables.

  11. Effect of self-assessment on test scores: student perceptions

    NSDL National Science Digital Library

    Beatriz U Ramirez (Universidad de Santiago de Chile)

    2010-09-01

    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.

  12. Test order effects in simultaneous protocols.

    PubMed

    Imam, Abdulrazaq A; Warner, Timothy A

    2014-03-01

    Simultaneous protocols typically yield poorer stimulus equivalence outcomes than do other protocols commonly used in equivalence research. Two independent groups of three 3-member equivalence sets of stimuli were used in conditional discrimination procedures in two conditions, one using the standard simultaneous protocol and the other using a hybrid simultaneous training and simple-to-complex testing. Participants completed the two conditions in one long session in Experiment 1, but in separate sessions in Experiment 2. The same stimulus sets used in Experiment 1 were randomized for the two conditions in Experiment 2. Overall, accuracy was better with the hybrid than with the standard protocol in both experiments. The equivalence yield was also better under the hybrid than under the standard protocol in each experiment. The results suggest that the order of testing for emergent relations may account for the difficulty often encountered with the standard simultaneous protocol. PMID:24272620

  13. Statistical analysis of the extreme values of stress time series from the Portevin-Le Châtelier effect.

    PubMed

    Kugiumtzis, D; Kehagias, A; Aifantis, E C; Neuhäuser, H

    2004-09-01

    In an effort to understand the deterministic vs stochastic character of the Portevin-Le Châtelier (PLC) phenomenon, we investigate the structure of the underlying mechanism that generates the stick-slip patterns of stress over time. The stress time series is reduced to a series of successive pairs of minimum and maximum values representing the stick-slip patterns and a statistical analysis by means of hypothesis testing is applied to it. The null hypothesis of least deterministic structure is that the time series of extreme values is a bounded random walk of alternating direction (BRWAD); that is, besides the constraint of succession of minima to maxima bounded at a predefined range there are no other correlations in the data. To implement the test we use surrogate data generated by a model consistent with a BRWAD type process, which also uses the statistics of the original data to best mimic them. The proposed hypothesis testing is found to perform properly on simulated data from stochastic and deterministic systems. For the PLC time series, the null hypothesis is rejected at a high level of confidence giving evidence for some deterministic structure in the succession of the extreme stress values. This result allows for further statistical analysis including also the time aspect of the stick-slip patterns. PMID:15524590

  14. Statistical analysis of the extreme values of stress time series from the Portevin-Le Châtelier effect

    NASA Astrophysics Data System (ADS)

    Kugiumtzis, D.; Kehagias, A.; Aifantis, E. C.; Neuhäuser, H.

    2004-09-01

    In an effort to understand the deterministic vs stochastic character of the Portevin-Le Châtelier (PLC) phenomenon, we investigate the structure of the underlying mechanism that generates the stick-slip patterns of stress over time. The stress time series is reduced to a series of successive pairs of minimum and maximum values representing the stick-slip patterns and a statistical analysis by means of hypothesis testing is applied to it. The null hypothesis of least deterministic structure is that the time series of extreme values is a bounded random walk of alternating direction (BRWAD); that is, besides the constraint of succession of minima to maxima bounded at a predefined range there are no other correlations in the data. To implement the test we use surrogate data generated by a model consistent with a BRWAD type process, which also uses the statistics of the original data to best mimic them. The proposed hypothesis testing is found to perform properly on simulated data from stochastic and deterministic systems. For the PLC time series, the null hypothesis is rejected at a high level of confidence giving evidence for some deterministic structure in the succession of the extreme stress values. This result allows for further statistical analysis including also the time aspect of the stick-slip patterns.

  15. Use of sediment serial dilution series to establish biological effect levels and clean-up goals

    SciTech Connect

    Timmer, E.; DeLong, T.; Millard, J.; Dobroski, C. [Roy F. Weston, Inc., West Chester, PA (United States)

    1995-12-31

    A sediment serial dilution study was used to determine biological effect levels for two freshwater invertebrates, Chironomus tentans and Hyalella azteca. The sediments for the test were collected from a New England brook which contained elevated levels of lead and polychlorinated aromatic hydrocarbons. The objective of the sediment dilution study was two-fold: (1 ) to provide a site-specific estimation of biological effect levels, thus reducing uncertainties associated with using literature-based values, and (2) to establish clean-up goals specific to this freshwater system.

  16. EFFECTS OF FOREFOOT RUNNING ON CHRONIC EXERTIONAL COMPARTMENT SYNDROME: A CASE SERIES

    PubMed Central

    Gregory, Robert; Alitz, Curtis; Gerber, J. Parry

    2011-01-01

    Introduction: Chronic exertional compartment syndrome (CECS) is a condition that occurs almost exclusively with running whereby exercise increases intramuscular pressure compromising circulation, prohibiting muscular function, and causing pain in the lower leg. Currently, a lack of evidence exists for the effective conservative management of CECS. Altering running mechanics by adopting forefoot running as opposed to heel striking may assist in the treatment of CECS, specifically with anterior compartment symptoms. Case Description: The purpose of this case series is to describe the outcomes for subjects with CECS through a systematic conservative treatment model focused on forefoot running. Subject one was a 21 y/o female with a 4 year history of CECS and subject two was a 21 y/o male, 7 months status-post two-compartment right leg fasciotomy with a return of symptoms and a new onset of symptoms on the contralateral side. Outcome: Both subjects modified their running technique over a period of six weeks. Kinematic and kinetic analysis revealed increased step rate while step length, impulse, and peak vertical ground reaction forces decreased. In addition, leg intracompartmental pressures decreased from pre-training to post-training. Within 6 weeks of intervention subjects increased their running distance and speed absent of symptoms of CECS. Follow-up questionnaires were completed by the subjects at 7 months following intervention; subject one reported running distances up to 12.87 km pain-free and subject two reported running 6.44 km pain-free consistently 3 times a week. Discussion: This case series describes a potentially beneficial conservative management approach to CECS in the form of forefoot running instruction. Further research in this area is warranted to further explore the benefits of adopting a forefoot running technique for CECS as well as other musculoskeletal overuse complaints. PMID:22163093

  17. 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

    Fessele, Claudia; Lindhorst, Thisbe K.

    2013-01-01

    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

  18. Effects of Reference Performance Testing During Aging Using Commercial Cells

    SciTech Connect

    Jon P. Christophersen; Chinh D. Ho; David Howell

    2005-07-01

    The Advanced Technology Development Program, under the oversight of the U.S. Department of Energy’s FreedomCAR and Vehicle Technologies Program, is investigating lithium-ion batteries for hybrid-electric vehicle applications. Cells are aged under various test conditions, including temperatures and states-of-charge. Life testing is interrupted at regular intervals to conduct reference performance tests (RPTs), which are used to measure changes in the electrical performance of the cells and then to determine cell degradation as a function of test time. Although designed to be unobtrusive, data from the Advanced Technology Development Gen 2 cells indicated that RPTs actually contributed to cell degradation and failure. A study was performed at the Idaho National Laboratory using commercially available lithium-ion cells to determine the impact of RPTs on life. A series of partial RPTs were performed at regular intervals during life testing and compared to a control group that was life tested without RPT interruption. It was determined that certain components of the RPT were detrimental, while others appeared to improve cell performance. Consequently, a new "mini" RPT was designed as an unobtrusive alternative. Initial testing with commercial cells indicates that the impact of the mini RPT is significantly less than the Gen 2 cell RPT.

  19. A Test of the Abstinence Violation Effect.

    ERIC Educational Resources Information Center

    Ruderman, Audrey J.

    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…

  20. The Effect of Testing on Student Achievement, 1910-2010

    ERIC Educational Resources Information Center

    Phelps, Richard P.

    2012-01-01

    This article summarizes research on the effect of testing on student achievement as found in English-language sources, comprising several hundred studies conducted between 1910 and 2010. Among quantitative studies, mean effect sizes range from a moderate d [image omitted] 0.55 to a fairly large d [image omitted] 0.88, depending on the way effects

  1. Comparing the effectiveness of recent algorithms to fill and smooth incomplete and noisy time series

    Microsoft Academic Search

    J. P. Musial; M. M. Verstraete; N. Gobron

    2011-01-01

    Geophysical time series often feature missing data or data acquired at irregular times. Procedures are needed to either resample these series at systematic time intervals or to generate reasonable estimates at specified times in order to meet specific user requirements or to facilitate subsequent analyses. Interpolation methods have long been used to address this problem, taking into account the fact

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

    Microsoft Academic Search

    S. L. Allums

    1974-01-01

    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

  3. Fabrication and use of zircaloy\\/tantalum-sheathed cladding thermocouples and molybdenum\\/rhenium-sheathed fuel centerline thermocouples. [For Severe Fuel Damage test series in PBF

    Microsoft Academic Search

    S. C. Wilkins; L. K. Sepold

    1985-01-01

    The thermocouples described in this report are zircaloy\\/tantalum-sheathed and molybdenum\\/rhenium alloy-sheathed instruments intended for fuel rod cladding and fuel centerline temperature measurements, respectively. Both types incorporate beryllium oxide insulation and tungsten\\/rhenium alloy thermoelements. These thermocouples, operated at temperatures of 2000°C and above, were developed for use in the internationally sponsored Severe Fuel Damage test series in the Power Burst Facility.

  4. Evaluating the effects of test methods and fluids compositions on the performance of corrosion inhibitors electrochemically

    SciTech Connect

    Chen, H.J. [Chevron Petroleum Technology Co., La Habra, CA (United States)

    1999-11-01

    In an attempt to answer the question ``can carbon steel be adequately protected from corrosion by use of corrosion inhibitors due to the high CO{sub 2} concentration``, the authors initiated a project to identify the best commercial corrosion inhibitor by conducting a series of performance evaluation tests. They solicited the inhibitors from various chemical suppliers and evaluated their performance using various test methods in test fluid compositions simulating field conditions. Inhibitor performance was evaluated using electrochemical techniques including EIS and DC in the Rotating Cylinder Electrode (RCE) system and the conventional weight loss methods. Various tests were conducted for the purpose of determining the effect of velocity, chemical partition, and dispersibility on inhibitor performance in various test fluids. Physical characteristics testing including emulsion tendency and brine dispersibility were also conducted. Results show that some commercial corrosion inhibitors can be used to protect carbon steel in high CO{sub 2} concentration. There are significant performance differences among commercial products in various test methods and fluid compositions. Results show the importance of multiple performance evaluations when selecting corrosion inhibitors for particular field applications. An inhibitor that out performs others under various testing conditions would have a much greater chance to protect against corrosion in the field.

  5. Microtox ® solid phase test: Effect of diluent used in toxicity test

    Microsoft Academic Search

    Annamaria Volpi Ghirardini; Marco Girardini; Davide Marchetto; Claudio Pantani

    2009-01-01

    Microtox® solid phase test is an acute toxicity test for solid matrices based on inhibition of natural bioluminescence of the marine bacterium Vibrio fischeri. Protocols developed to overcome the effects of confounding factors are proposed in the literature that differs by important practical and methodological issues. This work focused on diluents used for sediment resuspension and dilution. Two artificial seawaters,

  6. Effectiveness of an improved road safety policy in Ethiopia: an interrupted time series study

    PubMed Central

    2014-01-01

    Background In recent years, there has been an increasing interest in implementing road safety policy by different low income countries. However; the evidence is scarce on its success in the reduction of crashes, injuries and deaths. This study was conducted to assess whether road crashes, injuries and fatalities was reduced following the road safety regulation introduced as of September 2007 by Oromia Regional State Transport Bureau. Methods Routine road traffic accident data for the year 2002-2011were collected from sixteen traffic police offices. Data on average daily vehicle flow was obtained from the Ethiopian Road Authority. Interrupted time series design using segmented linear regression model was applied to estimate the effect of an improved road safety policy. Results A total of 4,053 crashes occurred on Addis Ababa - Adama/Hawassa main road. Of these crashes, almost half 46.4% (1,880) were property damage, 29.4% (1,193) were fatal and 24.2% (980) injury crashes, resulting 1,392 fatalities and 1,749 injuries. There were statistically significant reductions in non-injury crashes and deaths. Non-injury crash was reduced by 19% and fatality by 12.4% in the first year of implementing the revised transport safety regulation. Conclusion Although revised road safety policy helped in reducing motor vehicle crashes and associated fatalities, the overall incidence rate is still very high. Further action is required to avoid unnecessary loss of lives. PMID:24886220

  7. Time-series modeling of reservoir effects on river nitrate concentrations

    USGS Publications Warehouse

    Schoch, A.L.; Schilling, K.E.; Chan, K.-S.

    2009-01-01

    Saylorville Reservoir is a 24.1 km2 impoundment of the Des Moines River located approximately 10 km north of the City of Des Moines, Iowa, USA. Surface water from the Des Moines River used for drinking water supply is impaired for nitrate-nitrogen. Monthly mean nitrate concentration data collected upstream and downstream of the reservoir for a 30-year period (1977-2006) were selected for time-series analysis. Our objectives were to (1) develop a model describing nitrate concentrations downstream of the reservoir as a function of the concentrations entering the reservoir and (2) use the model to provide a 1-month ahead forecast for downstream water quality. Results indicated that downstream nitrate can be effectively modeled using a transfer function approach that utilized inflow concentrations during the current and previous month as input variables. Inflow concentrations were modeled using an AR(20) model, with the higher order model consistent with temporal correlation noted by others. The transfer function model suggested that the reservoir is reducing nitrate concentrations by 22 ?? 6%, a reduction that greatly exceeds previous estimates. Monthly nitrate forecasted with the model were nearly all within a 95% prediction interval of their actual measured values and did not appear greatly affected by flow variations. ?? 2009 Elsevier Ltd. All rights reserved.

  8. Dosage Effect and the Efficacy of a Video-Based Teamwork-Building Series with Urban Elementary School Children

    ERIC Educational Resources Information Center

    Mokrue, Kathariya; Elias, Maurice J.; Bry, Brenna H.

    2005-01-01

    This study examines the role of implementation dosage in the effectiveness of a school-based social and emotional skills building curriculum, The Talking with TJ video series, among urban, predominantly minority elementary school children. It was hypothesized that children in higher dosage schools will exhibit greater improvements in their social…

  9. Sizing the Horizon: The Effects of Chart Size and Layering on the Graphical Perception of Time Series Visualizations

    E-print Network

    O'Brien, James F.

    Sizing the Horizon: The Effects of Chart Size and Layering on the Graphical Perception of Time. We compare line charts with horizon graphs--a space-efficient time series visualization technique--across a range of chart sizes, measuring the speed and accuracy of subjects' estimates of value differences

  10. The Deterrent Effect of Capital Punishment in the Five Most Active Execution States: A Time Series Analysis

    Microsoft Academic Search

    Scott H. Decker; Carol W. Kohfeld

    1990-01-01

    This study examines the effect of the death penalty on the murder rate. A 50-year time series is employed for the period 1930-1980 for the five states with the largest number of executions during this period: Georgia, New York, Texas, California, and North Carolina. Taken together, these five states accounted for 40 percent of all the executions performed during this

  11. The testing effect on skills learning might last 6 months

    Microsoft Academic Search

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

    2010-01-01

    In a recent study we found that testing as a final activity in a skills course increases the learning outcome compared to\\u000a spending an equal amount of time practicing. Whether this testing effect measured as skills performance can be demonstrated\\u000a on long-term basis is not known. The research question was: does testing as a final activity in a cardio-pulmonary resuscitation

  12. GIS Surface Effects Map Archive, Nevada Test Site, Nevada

    SciTech Connect

    Grasso, Dennis N.

    2003-08-28

    The GIS Surface Effects Map Archive contains a comprehensive collection of maps showing the surface effects produced by underground nuclear testing at the Nevada Test Site. From 1951 to 1992, scientists with the U.S. Geological Survey and agencies of the U.S. Department of Energy used field and aerial-photo mapping techniques to painstakingly map such surface effects as collapse sinks, craters, cracks, fractures, faults, and pressure ridges. Shortly after each test, a complex surface effects map was produced. Of the more than 920 underground detonations conducted at the Nevada Test Site, 688 were mapped for surface effects. This archive preserves these original maps in digital format. A Geographic Information System (GIS) was used to digitally reproduce each original, hand-drawn surface effects map and to assemble these maps into the digital data sets of this archive. The archive was designed to allow easy access to the maps, while preserving the original maps for perpetuity. Users can query the detonation sites database; prepare, view, and print individual or composite maps; and perform various types of scientific analysis and management tasks. Spatial analyses and queries can be performed on detonation sites and related surface effects in conjunction with other chronological, geographical, geological, or hydrological information via links to external maps and databases. This browser interface provides information about the archive, the history of surface effects mapping at the Nevada Test Site, the methods used to produce the digital surface effects maps, and links to published reports, data tables, and maps. Location maps show testing areas, operational areas, and detonation sites. Demonstration maps illustrate the methods used to produce the digital surface effects maps and exhibit some of the characteristics and uses for these data. Use the links below to view and print individual surface effects maps, retrieve information about the detonations and types of surface effects produced, and to learn about the organization and intended use of the map data contained in the archive.

  13. USING POTATOES IN PROPAGATION TESTS FOR NONTARGET PLANT EFFECTS

    EPA Science Inventory

    Current tests required for pesticide registration under the FIFRA only investigate seedling emergence and early growth. Previous research with sulfonylurea (SU) herbicides has shown that significant impacts can occur to plant reproduction with little or no visible effect on vege...

  14. Testing a Sociological Theory of Recreational Drug Effects

    ERIC Educational Resources Information Center

    Orcutt, James D.; Briggs, Donald A.

    1975-01-01

    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)

  15. Effects of First Occasion Test Experience on Longitudinal Cognitive Change

    ERIC Educational Resources Information Center

    Salthouse, Timothy A.

    2013-01-01

    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…

  16. Effects of Anxiety and Sex on Neuropsychological Tests.

    ERIC Educational Resources Information Center

    King, Glen D.; And Others

    1978-01-01

    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…

  17. Biological effects of underground nuclear testing on marine organisms. II. Observed effects of Amchitka Island, Alaska, tests on marine fauna

    SciTech Connect

    Isakson, J.S.

    1973-01-01

    >From conference on the environmental effects of explosives and explosions; White Oak, Maryland, USA (30 May 1973). The biological effects of the Longshot, Milrow, and Cannikin underground nuclear tests at Amchitka lsland, Alaska, on marine mammals, fishes, and birds are summarized. The biological effects observed were related to the water-borne shock waves produced by the explosions. (CH)

  18. Effects of homeopathic mother tinctures on breath alcohol testing.

    PubMed

    Boatto, Gianpiero; Trignano, Claudia; Burrai, Lucia; Spanu, Andrea; Nieddu, Maria

    2015-01-01

    In some countries, it is illegal to drive with any detectable amount of alcohol in blood; in others, the legal limit is 0.5 g/L or lower. Recently, some defendants charged with driving under the influence of alcohol and have claimed that positive breath alcohol test results were due to the ingestion of homeopathic mother tinctures. These preparations are obtained by maceration, digestion, infusion, or decoction of herbal material in hydroalcoholic solvent. A series of tests were conducted to evaluate the alcoholic content of three homeopathic mother tinctures and their ability to produce inaccurate breath alcohol results. Nine of 30 subjects gave positive results (0.11-0.82 g/L) when tests were taken within 1 min after drinking mother tincture. All tests taken at least 15 min after the mother tincture consumption and resulted in alcohol-free readings. An observation period of 15-20 min prior to breath alcohol testing eliminates the possibility of false-positive results. PMID:25387897

  19. Test Report: Cost Effective Foundation Insulation

    SciTech Connect

    Jeffrey M. Lacy; T. E. Rahl; G. A. Twitchell; R. G. Kobbe

    2003-06-01

    A field experiment was conducted to demonstrate and quantify the thermal effectiveness of rigid insulation board when installed on the exterior of a buried concrete foundation wall. A heated, insulated box was constructed along one wall of an existing, unheated building to simulate the living space of a home. The crawl space beneath the living space was divided into two sections. One featured external foundation insulation, while the other side had none. 36 temperature and heat flux sensors were installed at predetermined locations to measure the temperature profile and heat flow out of the living space. The temperature profile through the foundation was then used to calculate the total heat flow out of the foundation for both cases. This experiment showed that a significant energy savings is available with exterior foundation insulation. Over the course of 3 months, the heat-loss differential between the insulated and non-insulated foundations was 4.95 kilowatt-hours per lineal foot of foundation wall, for a ratio of 3:1. For a 2200 sq. ft home with a foundation perimeter 200 ft. long, this would amount to a savings of 990 kW-hrs in just 3 months, or 330 kW-hrs per month. Extrapolating to an 8-month heating year, we would expect to save over 2640 kW-hrs per year for such a home. The savings for a basement foundation, rather than a crawlspace, would be approach twice that amount, nearing 5280 kW-hr per year. Because these data were not collected during the coldest months of the year, they are conservative, and greater savings may be expected during colder periods.

  20. Test results and initial operating experience for the BPA 500 kV thyristor controlled series capacitor design, operation, and fault test results

    Microsoft Academic Search

    S. J. Kinney; W. A. Mittelstadt; R. W. Suhrbier

    1995-01-01

    A cooperative effort has resulted in the construction of the first 500 kV Thyristor Controlled Series Capacitor (TCSC). This device is installed on the Bonneville Power Administration (BPA) transmission system in the Northwestern United States. Project participants included BPA, the Electrical Power Research Institute (EPRI), General Electric Company (GE), and the Portland General Electric Company (PGE). The TCSC was commissioned

  1. Antimycotic effectiveness against dermatophytes: comparison of two in vitro tests.

    PubMed

    Galuppi, Roberta; Gambarara, Alessandra; Bonoli, Cristina; Ostanello, Fabio; Tampieri, Maria Paola

    2010-06-01

    Seven antimycotic drugs (econazole, enilconazole, fluconazole, griseofulvin, itraconazole, ketoconazole, and miconazole) were tested against 36 dermatophyte strains (19 M. canis, 7 T. mentagrophytes, 5 M. gypseum, 2 M. cookei, 1 T. rubrum, 1 T. ajelloi, and 1 T. terrestre) isolated from animals, humans, and the environment. Two in vitro methods were compared: a micro-dilution test based on the CLSI M38-A method, and a disk-diffusion test. Fluconazole was not effective in vitro against the dermatophytes. Econazole and enilconazole were the most effective. Thirteen strains were griseofulvin-resistant. The correlation between the two methods was statistically significant for enilconazole, griseofulvin, itraconazole, and miconazole. PMID:20490661

  2. National Study of Postsecondary Faculty (NSOPF:04) Field Test Methodology Report, 2004. Working Paper Series. NCES 2004-01

    ERIC Educational Resources Information Center

    Heuer, R. E.; Cahalan, M.; Fahimi, M.; Curry-Tucker, J. L.; Carley-Baxter, L.; Curtin, T. R.; Hinsdale, M.; Jewell, D. M.; Kuhr, B. D.; McLean, L.

    2004-01-01

    This report describes the methodology and findings of the NSOPF:04 field test that took place during the 2002?03 academic year. The NSOPF:04 field test was used to plan, implement, and evaluate methodological procedures, instruments, and systems proposed for use in the full-scale study scheduled for the 2003-04 academic year. The field test was…

  3. Production test IP734, HAPO 309: High core temperature capsules in the KW Snout facility, Series 2

    Microsoft Academic Search

    Cox

    1964-01-01

    The objective of the production test detailed in this report is to continue a program started under Production Test IP-690; the major change is an increase in sample enrichment. The higher enrichment is required to increase the portion of the fuel element core which is molten. This test will provide data to correlate maximum fuel temperature with post-irradiation microstructure, and

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

    Microsoft Academic Search

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

    1977-01-01

    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

  5. Evaluation of the effects of climate and man intervention on ground waters and their dependent ecosystems using time series analysis

    NASA Astrophysics Data System (ADS)

    Gemitzi, Alexandra; Stefanopoulos, Kyriakos

    2011-06-01

    SummaryGroundwaters and their dependent ecosystems are affected both by the meteorological conditions as well as from human interventions, mainly in the form of groundwater abstractions for irrigation needs. This work aims at investigating the quantitative effects of meteorological conditions and man intervention on groundwater resources and their dependent ecosystems. Various seasonal Auto-Regressive Integrated Moving Average (ARIMA) models with external predictor variables were used in order to model the influence of meteorological conditions and man intervention on the groundwater level time series. Initially, a seasonal ARIMA model that simulates the abstraction time series using as external predictor variable temperature ( T) was prepared. Thereafter, seasonal ARIMA models were developed in order to simulate groundwater level time series in 8 monitoring locations, using the appropriate predictor variables determined for each individual case. The spatial component was introduced through the use of Geographical Information Systems (GIS). Application of the proposed methodology took place in the Neon Sidirochorion alluvial aquifer (Northern Greece), for which a 7-year long time series (i.e., 2003-2010) of piezometric and groundwater abstraction data exists. According to the developed ARIMA models, three distinct groups of groundwater level time series exist; the first one proves to be dependent only on the meteorological parameters, the second group demonstrates a mixed dependence both on meteorological conditions and on human intervention, whereas the third group shows a clear influence from man intervention. Moreover, there is evidence that groundwater abstraction has affected an important protected ecosystem.

  6. Theory Testing Using Quantitative Predictions of Effect Size

    PubMed Central

    Velicer, Wayne F.; Cumming, Geoff; Fava, Joseph L.; Rossi, Joseph S.; Prochaska, James O.; Johnson, Janet

    2012-01-01

    Traditional Null Hypothesis Testing procedures are poorly adapted to theory testing. The methodology can mislead researchers in several ways, including: (a) a lack of power can result in an erroneous rejection of the theory; (b) the focus on directionality (ordinal tests) rather than more precise quantitative predictions limits the information gained; and (c) the misuse of probability values to indicate effect size. An alternative approach is proposed which involves employing the theory to generate explicit effect size predictions that are compared to the effect size estimates and related confidence intervals to test the theoretical predictions. This procedure is illustrated employing the Transtheoretical Model. Data from a sample (N = 3,967) of smokers from a large New England HMO system were used to test the model. There were a total of 15 predictions evaluated, each involving the relation between Stage of Change and one of the other 15 Transtheoretical Model variables. For each variable, omega-squared and the related confidence interval were calculated and compared to the predicted effect sizes. Eleven of the 15 predictions were confirmed, providing support for the theoretical model. Quantitative predictions represent a much more direct, informative, and strong test of a theory than the traditional test of significance. PMID:22837590

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

    NASA Technical Reports Server (NTRS)

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

    2013-01-01

    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.

  8. Optimal tests for rare variant effects in sequencing association studies

    PubMed Central

    Lee, Seunggeun; Wu, Michael C.; Lin, Xihong

    2012-01-01

    With development of massively parallel sequencing technologies, there is a substantial need for developing powerful rare variant association tests. Common approaches include burden and non-burden tests. Burden tests assume all rare variants in the target region have effects on the phenotype in the same direction and of similar magnitude. The recently proposed sequence kernel association test (SKAT) (Wu, M. C., and others, 2011. Rare-variant association testing for sequencing data with the SKAT. The American Journal of Human Genetics 89, 82–93], an extension of the C-alpha test (Neale, B. M., and others, 2011. Testing for an unusual distribution of rare variants. PLoS Genetics 7, 161–165], provides a robust test that is particularly powerful in the presence of protective and deleterious variants and null variants, but is less powerful than burden tests when a large number of variants in a region are causal and in the same direction. As the underlying biological mechanisms are unknown in practice and vary from one gene to another across the genome, it is of substantial practical interest to develop a test that is optimal for both scenarios. In this paper, we propose a class of tests that include burden tests and SKAT as special cases, and derive an optimal test within this class that maximizes power. We show that this optimal test outperforms burden tests and SKAT in a wide range of scenarios. The results are illustrated using simulation studies and triglyceride data from the Dallas Heart Study. In addition, we have derived sample size/power calculation formula for SKAT with a new family of kernels to facilitate designing new sequence association studies. PMID:22699862

  9. Effects of air pollution on neonatal prematurity in guangzhou of china: a time-series study

    PubMed Central

    2011-01-01

    Background Over the last decade, a few studies have investigated the possible adverse effects of ambient air pollution on preterm birth. However, the correlation between them still remains unclear, due to insufficient evidences. Methods The correlation between air pollution and preterm birth in Guangzhou city was examined by using the Generalized Additive Model (GAM) extended Poisson regression model in which we controlled the confounding factors such as meteorological factors, time trends, weather and day of the week (DOW). We also adjusted the co linearity of air pollutants by using Principal Component Analysis. The meteorological data and air pollution data were obtained from the Meteorological Bureau and the Environmental Monitoring Centre, while the medical records of newborns were collected from the perinatal health database of all obstetric institutions in Guangzhou, China in 2007. Results In 2007, the average daily concentrations of NO2, PM10 and SO2 in Guangzhou, were 61.04, 82.51 and 51.67 ?g/m3 respectively, where each day an average of 21.47 preterm babies were delivered. Pearson correlation analysis suggested a negative correlation between the concentrations of NO2, PM10, SO2, and temperature as well as relative humidity. As for the time-series GAM analysis, the results of single air pollutant model suggested that the cumulative effects of NO2, PM10 and SO2 reached its peak on day 3, day 4 and day 3 respectively. An increase of 100 ?g/m3 of air pollutants corresponded to relative risks (RRs) of 1.0542 (95%CI: 1.0080 ~1.1003), 1.0688 (95%CI: 1.0074 ~1.1301) and 1.1298 (95%CI: 1.0480 ~1.2116) respectively. After adjusting co linearity by using the Principal Component Analysis, the GAM model of the three air pollutants suggested that an increase of 100 ?g/m3 of air pollutants corresponded to RRs of 1.0185 (95%CI: 1.0056~1.0313), 1.0215 (95%CI: 1.0066 ~1.0365) and 1.0326 (95%CI: 1.0101 ~1.0552) on day 0; and RRs of the three air pollutants, at their strongest cumulative effects, were 1.0219 (95%CI: 1.0053~1.0386), 1.0274 (95%CI: 1.0066~1.0482) and 1.0388 (95%CI: 1.0096 ~1.0681) respectively. Conclusions This study indicates that the daily concentrations of air pollutants such as NO2, PM10 and SO2 have a positive correlation with the preterm births in Guangzhou, China. PMID:21214958

  10. PG&E 500 kV series-compensated transmission line relay replacement: Design requirements and RTDS® testing

    Microsoft Academic Search

    Davis Erwin; Monica Anderson; Rafael Pineda; Demetrios A. Tziouvaras; Rick Turner

    2011-01-01

    Pacific Gas and Electric Company (PG&E) owns an extensive 500 kV series-compensated transmission line network. The availability of this network is critical to serving Northern California loads and regional power transfers from the Pacific Northwest to Southern California. PG&E identified six transmission lines requiring immediate replacement of faulty solid-state relay systems with modern, more reliable microprocessor-based relay systems to improve

  11. Kamyr PD Series Full-Borne Ball Valve METC SOA Test Valve No. A-17 state-of-the-art lockhopper valve-testing and development project

    Microsoft Academic Search

    J. F. Gardner; R. C. Hall; R. G. Hornbeck; R. A. Griffith; T. M. Nutter; T. M. Yost; T. Vandergrift; T. R. Gayheart; D. L. Armstrong

    1981-01-01

    The Kamyr Ball Valve, METC SOA Test Valve No. A-17, accumulated 640 valve cycles in the Valve Static Test Unit and over 16,900 valve cycles in the Valve Dynamic Test Unit. During dynamic testing (with minus 8 mesh and 5\\/16'' x 1\\/8'' limestone), the stem packing was replaced twice and the valve was disassembled once to remove compacted fines from

  12. Field performance testing : heritability and correction of sex effect

    E-print Network

    Paris-Sud XI, Université de

    Field performance testing : heritability and correction of sex effect J. NAVEAU S.C.A., Pen animals from the selection centre of Pen-Ar-Lan (France). The sex effect was estimated on the basis models, one including sex, the other excluding it. Results showed that in a farm unit, sex may

  13. Radiation effects test facility at the Indiana University Cyclotron Facility

    Microsoft Academic Search

    C. C. Foster; S. L. Casey; A. L. Johnson; P. Miesle; N. Sifri; A. H. Skees; K. M. Murray

    1997-01-01

    The beam line end station, associated instrumentation and dosimetry used at the Indiana University Cyclotron Facility for radiation effects research and testing with up to 200 MeV protons are described. Access to beam for radiation effects studies is greatly enhanced by the capability to share beam with other users on a millisecond time scale. Use of shared beam mandates that

  14. Measuring propaganda effects with direct and indirect attitude tests

    Microsoft Academic Search

    Jack A. Parrish; Donald T. Campbell

    1953-01-01

    An attempt is made to study propaganda effectiveness through the use of disguised attitude measures. The relative effectiveness of two typical radio styles used in informational programs is studied  The traditional pretest design is abandoned in favor of matched groups given a post-test only.

  15. Random Effects Structure for Confirmatory Hypothesis Testing: Keep It Maximal

    ERIC Educational Resources Information Center

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

    2013-01-01

    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…

  16. ASSESSMENT OF EXISTING TEST REPORTS FOR EVALUATING VOC CONTROL EFFECTIVENESS

    EPA Science Inventory

    The report outlines the approach taken by EPA to review existing test reports for evaluating volatile organic compound (VOC) control device effectiveness and identifying missing control device effectiveness information. A format is presented to provide guidance and serve as the b...

  17. The Effect of Black Peers on Black Test Scores

    ERIC Educational Resources Information Center

    Armor, David J.; Duck, Stephanie

    2007-01-01

    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…

  18. EFFECTS OF NAVAL ORDNANCE TESTS ON THE PATUXENT RIVER FISHERY

    E-print Network

    of Medicine, Univ. of Puerto Rico. #12;#12;EFFECTS OF NAVAL ORDNANCE TESTS ON THE PATUXENT RIVER FISHERY Introduction Naval ordnance research, an essential part of our national defense program, cannot be effectively of much speculation, but little study. Seismic surveys for coastal oil resources have been studied

  19. 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)

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

    2004-01-01

    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.

  20. Effects of automatic item eliminations based on item test analysis

    NSDL National Science Digital Library

    Jaap HJ Muntinga (University of Groningen Medical Physiology)

    2007-09-08

    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.

  1. Effects of automatic item eliminations based on item test analysis.

    PubMed

    Muntinga, Jaap H J; Schuil, Henk A

    2007-09-01

    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. PMID:17848590

  2. Single-Event Effect Report for EPC Series eGaN FETs: EPC2015, EPC2014, EPC2012

    NASA Technical Reports Server (NTRS)

    Scheick, Leif

    2014-01-01

    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.

  3. Effect of long-term climbing training on cerebellar ataxia: a case series.

    PubMed

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

    2011-01-01

    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

  4. Test–retest reliability and practice effects of Expanded Halstead–Reitan Neuropsychological Test Battery

    Microsoft Academic Search

    SUREYYA S. DIKMEN; ROBERT K. HEATON; IGOR GRANT; NANCY R. TEMKIN

    1999-01-01

    Test-retest reliabilities and practice effects of a broad range of neuropsychological measures were examined in 384 normal or neurologically stable adults. Median test-retest interval was 11 months (range 3-16 months). The reliability estimates for most of the measures are reasonably good, ranging from .70 to low .90s. An exception is the relatively poor reliabilities of most memory measures. For all

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

    SciTech Connect

    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

    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.

  6. Anti-aquaporin 4 antibody test in a large series of Japanese optic-spinal multiple sclerosis and neuromyelitis optica

    Microsoft Academic Search

    K Tanaka; T Tani; M Tanaka; M Nishizawa; K Sakimura; M Matsui

    Anti-aquaporin 4 antibody (AQP4-Ab) is detected specifically with high sensitivity in optic-spinal form of multiple sclerosis (OSMS)\\/neuromyelitis optica (NMO). We established the immunofluorescence detection system of NMO-IgG and AQP4 antibody (AQP4-Ab) using human AQP4 cDNA-transfected HEK 293 cells and examined NMO-IgG\\/AQP4-Ab in a large series of Japanese OSMS\\/NMO patients since 2006. As for NMO-IgG detection, we used cryostat sections from

  7. Summary of construction details and test performance of recent series of 1. 8 meter SSC dipoles at BNL

    SciTech Connect

    Goodzeit, C.; Wanderer, P.

    1990-01-01

    Certain design features of the SSC dipole magnets are evaluated with 1.8-meter models built and tested at BNL. We report the results of recent tests of such magnets relating quench performance and field quality measurements to mechanical design and assembly features such as collar material, collared coil dimensions and fit with the yoke and coil prestress level. 9 figs., 5 tabs.

  8. Imputation of Test Scores in the National Education Longitudinal Study of 1988 (NELS:88). Working Paper Series.

    ERIC Educational Resources Information Center

    Bokossa, Maxime C.; Huang, Gary G.

    This report describes the imputation procedures used to deal with missing data in the National Education Longitudinal Study of 1988 (NELS:88), the only current National Center for Education Statistics (NCES) dataset that contains scores from cognitive tests given the same set of students at multiple time points. As is inevitable, cognitive test

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

    ERIC Educational Resources Information Center

    Schnipke, Deborah L.; Scrams, David J.

    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…

  10. Intelligence Testing and Minority Students: Foundations, Performance Factors, and Assessment Issues. Racial and Ethnic Minority Psychology Series.

    ERIC Educational Resources Information Center

    Valencia, Richard R.; Suzuki, Lisa A.

    This book examines intelligence assessment among ethnic minority children. Part 1, "Foundations," includes: (1) "Historical Issues" (e.g., emergence of intelligence testing in Europe and ideology of the intelligence testing movement); and (2) "Multicultural Perspective of Intelligence: Theory and Measurement Issues" (e.g., group differences in…

  11. V/STOL and STOL ground effects and testing techniques

    NASA Technical Reports Server (NTRS)

    Kuhn, R. E.

    1987-01-01

    The ground effects associated with V/STOL operation were examined and an effort was made to develop the equipment and testing techniques needed for that understanding. Primary emphasis was on future experimental programs in the 40 x 80 and the 80 x 120 foot test sections and in the outdoor static test stand associated with these facilities. The commonly used experimental techniques are reviewed and data obtained by various techniques are compared with each other and with available estimating methods. These reviews and comparisons provide insight into the limitations of past studies and the testing techniques used and identify areas where additional work is needed. The understanding of the flow mechanics involved in hovering and in transition in and out of ground effect is discussed. The basic flow fields associated with hovering, transition and STOL operation of jet powered V/STOL aircraft are depicted.

  12. SEISMIC RESPONSE PREDICTION OF NUPEC'S FIELD MODEL TESTS OF NPP STRUCTURES WITH ADJACENT BUILDING EFFECT.

    SciTech Connect

    XU,J.COSTANTINO,C.HOFMAYER,C.ALI,S.

    2004-03-04

    As part of a verification test program for seismic analysis computer codes for Nuclear Power Plant (NPP) structures, the Nuclear Power Engineering Corporation (NUPEC) of Japan has conducted a series of field model tests to address the dynamic cross interaction (DCI) effect on the seismic response of NPP structures built in close proximity to each other. The program provided field data to study the methodologies commonly associated with seismic analyses considering the DCI effect. As part of a collaborative program between the United States and Japan on seismic issues related to NPP applications, the U.S. Nuclear Regulatory Commission sponsored a program at Brookhaven National Laboratory (BNL) to perform independent seismic analyses which applied common analysis procedures to predict the building response to recorded earthquake events for the test models with DCI effect. In this study, two large-scale DCI test model configurations were analyzed: (1) twin reactor buildings in close proximity and (2) adjacent reactor and turbine buildings. This paper describes the NUPEC DCI test models, the BNL analysis using the SASSI 2000 program, and comparisons between the BNL analysis results and recorded field responses. To account for large variability in the soil properties, the conventional approach of computing seismic responses with the mean, mean plus and minus one-standard deviation soil profiles is adopted in the BNL analysis and the three sets of analysis results were used in the comparisons with the test data. A discussion is also provided in the paper to address (1) the capability of the analysis methods to capture the DCI effect, and (2) the conservatism of the practice for considering soil variability in seismic response analysis for adjacent NPP structures.

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

    PubMed Central

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

    2014-01-01

    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

  14. Testing various fruits for anti-thrombotic effect: i. Mulberries.

    PubMed

    Yamamoto, Junichiro; Naemura, Aki; Ura, Mayumi; Ijiri, Yoshinobu; Yamashita, Tsutomu; Kurioka, Akira; Koyama, Akio

    2006-12-01

    Prevention of arterial thrombotic disease has high priority in developed countries. As inappropriate diet predispose to acute thrombotic events, regular intake of an antithrombotic diet may be a convenient and effective way of prevention. The present study was performed to examine antithrombotic effect of mulberry varieties. A shear-induced in vitro platelet reactivity/thrombolysis test (Gorog Thrombosis Test) was used to screen for antiplatelet and thrombolytic activities. In case of effectiveness, it was followed by an in vivo test of laser-induced thrombosis in mice. Antioxidant capacity was assessed by superoxide anion and radical scavenging activities. Total polyphenolics, anthocyanin and citrate contents were also measured. The tested varieties showed different effect in vitro on platelet reactivity and endogenous thrombolytic activity. Varieties inhibiting platelet reactivity were antithrombotic in vivo regardless inhibition or enhancement of thrombolysis. Those mulberry varieties, which enhanced platelet reactivity in vitro, were prothrombotic only if inhibitory activity on endogenous thrombolysis coexisted with the platelet effect. Antioxidant activities and polyphenolics content did not affect platelets and the overall thrombotic status. However, antioxidant activities and polyphenolics content significantly correlated with the endogenous thrombolytic activity. These data showed that mulberry varieties can be grouped into subclasses with either anti- or prothrombotic activities. Antioxidant activities and polyphenolic contents do not affect platelets but may enhance endogenous thrombolysis, thus causing an overall antithrombotic effect. PMID:17127483

  15. Effects of a maximal exercise test on neurocognitive function

    Microsoft Academic Search

    Tracey Covassin; Leigh Weiss; John Powell; Christopher Womack; M. R Lovell

    2007-01-01

    Objective: To examine the effects of a maximal exercise test on cognitive function in recreational athletes.Design: A repeated-measures design was used to compare baseline with post-cognitive function and fatigue symptoms after a maximal exercise test.Setting: Division 1 American Midwestern University, (Michigan State University, Michigan, USA).Participants: 102 male and female recreational athletes.Intervention: Participants in the experimental group (n = 54) were

  16. Effect of test position on pelvic floor muscle assessment.

    PubMed

    Frawley, Helena C; Galea, Mary P; Phillips, Bev A; Sherburn, Margaret; Bø, Kari

    2006-06-01

    The aims of this study were to analyse the effect of different body positions on pelvic floor muscle (PFM) assessment using digital muscle testing, manometry and transabdominal ultrasound. In addition, subject acceptance of each testing position was recorded. Subjects were 20 women's health physiotherapists. The testing protocol included the best of three maximum voluntary contractions tested in each of four positions (crook lying, supine, sitting and standing). Significant differences in muscle strength and subject acceptance between positions were found with each tool, most often between lying and upright positions. Digital muscle testing and vaginal squeeze-pressure scores were highest in the lying position, and vaginal resting pressure and transabdominal ultrasound scores were highest in the standing position. Subjects preferred the lying positions for internal examinations. The clinical significance of these differences and the reasons for these variations require further investigation. PMID:16205845

  17. Testing chiral effective theory with quenched lattice QCD

    E-print Network

    L. Giusti; P. Hernandez; S. Necco; C. Pena; J. Wennekers; H. Wittig

    2008-03-19

    We investigate two-point correlation functions of left-handed currents computed in quenched lattice QCD with the Neuberger-Dirac operator. We consider two lattice spacings a~0.09,0.12 fm and two different lattice extents L~ 1.5, 2.0 fm; quark masses span both the p- and the epsilon-regimes. We compare the results with the predictions of quenched chiral perturbation theory, with the purpose of testing to what extent the effective theory reproduces quenched QCD at low energy. In the p-regime we test volume and quark mass dependence of the pseudoscalar decay constant and mass; in the epsilon-regime, we investigate volume and topology dependence of the correlators. While the leading order behaviour predicted by the effective theory is very well reproduced by the lattice data in the range of parameters that we explored, our numerical data are not precise enough to test next-to-leading order effects.

  18. Fabrication and use of zircaloy/tantalum-sheathed cladding thermocouples and molybdenum/rhenium-sheathed fuel centerline thermocouples. [For Severe Fuel Damage test series in PBF

    SciTech Connect

    Wilkins, S.C.; Sepold, L.K.

    1985-01-01

    The thermocouples described in this report are zircaloy/tantalum-sheathed and molybdenum/rhenium alloy-sheathed instruments intended for fuel rod cladding and fuel centerline temperature measurements, respectively. Both types incorporate beryllium oxide insulation and tungsten/rhenium alloy thermoelements. These thermocouples, operated at temperatures of 2000/sup 0/C and above, were developed for use in the internationally sponsored Severe Fuel Damage test series in the Power Burst Facility. The fabrication steps for both thermocouple types are described in detail. A laser-welding attachment technique for the cladding-type thermocouple is presented, and experience with alternate materials for cladding and fuel therocouples is discussed.

  19. Aerodynamic and Hydrodynamic Tests of a Family of Models of Flying Hulls Derived from a Streamline Body -- NACA Model 84 Series

    NASA Technical Reports Server (NTRS)

    Parkinson, John B; Olson, Roland E; Draley, Eugene C; Luoma, Arvo A

    1943-01-01

    A series of related forms of flying-boat hulls representing various degrees of compromise between aerodynamic and hydrodynamic requirements was tested in Langley Tank No. 1 and in the Langley 8-foot high-speed tunnel. The purpose of the investigation was to provide information regarding the penalties in water performance resulting from further aerodynamic refinement and, as a corollary, to provide information regarding the penalties in range or payload resulting from the retention of certain desirable hydrodynamic characteristics. The information should form a basis for over-all improvements in hull form.

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

    Microsoft Academic Search

    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

    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

  1. Short term effect of rainfall on suspected malaria episodes at Magaria, Niger: a time series study

    Microsoft Academic Search

    Jean-François Jusot; Oumarou Alto

    2011-01-01

    Epidemiological patterns of malaria are influenced by different kinds of climate. In Sahelian countries, the link between climatic factors and malaria is still insufficiently quantified. The aim of this work was to conduct a time-series study of rainfall to estimate the increased risk of malaria morbidity.Daily suspected malaria episodes among subjects of all ages were collected retrospectively in three health

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

    E-print Network

    Scofield, John H.

    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

  3. The Effects of Social Security on Private Savings: A Reappraisal of the Time Series Evidence

    Microsoft Academic Search

    Wade Donald Pfau

    2005-01-01

    Section I reviews some of the important contributions using time series evidence to estimate Social Security’s impact on private savings. Essential to these studies is the use of a “Social Security Wealth” (SSW) variable, created by Martin Feldstein (1974), which defines the present value of future discounted Social Security benefits for the entire population under the assumption that each working

  4. 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 ...

  5. MULTIVARIATE STATISTICAL MODELS FOR EFFECTS OF PM AND COPOLLUTANTS IN A DAILY TIME SERIES EPIDEMIOLOGY STUDY

    EPA Science Inventory

    Most analyses of daily time series epidemiology data relate mortality or morbidity counts to PM and other air pollutants by means of single-outcome regression models using multiple predictors, without taking into account the complex statistical structure of the predictor variable...

  6. Some effects of experimental error in fracture testing

    NASA Technical Reports Server (NTRS)

    Orange, T. W.

    1973-01-01

    Effects of experimental imprecision on the stress intensity factors calculated for various practical specimen types are shown. A general form equation for the stress intensity factor is presented and a general error equation is derived. The expected error in the stress intensity factor is given in terms of the precision levels of the basic experimental measurements and derivatives of the stress intensity calibration factor. Nine common fracture specimen types are considered, and the sensitivity of the various types to experimental error is illustrated. Some implications for fracture toughness testing and crack growth rate testing are discussed and methods of analysis are proposed to compensate for the effects of experimental error.

  7. Effects of Targeted Test Preparation on Scores of Two Tests of Oral English as a Second Language

    ERIC Educational Resources Information Center

    Farnsworth, Tim

    2013-01-01

    This study investigated the effect of targeted test preparation, or coaching, on oral English as a second language test scores. The tests in question were the Basic English Skills Test Plus (BEST Plus), a scripted oral interview published by the Center for Applied Linguistics, and the Versant English Test (VET), a computer-administered and…

  8. Calibration of air-data systems and flow direction sensors. AGARD Flight Test Techniques Series, volume 1

    NASA Astrophysics Data System (ADS)

    Lawford, J. A.; Nippress, K. R.

    1983-09-01

    The calibration of air-data and flow direction measurement systems is discussed. The available flight test calibration methods are described and their applicability, accuracies, and limitations are reviewed.

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

    PubMed

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

    2012-01-01

    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

  10. OHMSETT (Oil and Hazardous Materials Simulated Environmental Test Tank) test series 77: Global Oil Recovery Skimmer, Veegarm Skimming Arm, Kebab 600, Wylie Skimmer and the Skim-Pak Cluster. Final report Jan 80-Jun 81

    Microsoft Academic Search

    Borst

    1984-01-01

    This report covers the performance testing of five oil spill recovery devices at the Oil and Hazardous Materials Simulated Environmental Test Tank in Leonardo, New Jersey. The GOR Skimmer was tow tested in harbor chops, regular waves, and calm water at tow speeds through 2 knots to determine the effectiveness of modifications made to the device since it was last

  11. 21 CFR 350.60 - Guidelines for effectiveness testing of antiperspirant drug products.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 false Guidelines for effectiveness testing of antiperspirant drug products...OVER-THE-COUNTER HUMAN USE Guidelines for Effectiveness Testing § 350.60 Guidelines for effectiveness testing of antiperspirant drug...

  12. Unspecific chronic low back pain – a simple functional classification tested in a case series of patients with spinal deformities

    PubMed Central

    Weiss, Hans-Rudolf; Werkmann, Mario

    2009-01-01

    Background Up to now, chronic low back pain without radicular symptoms is not classified and attributed in international literature as being "unspecific". For specific bracing of this patient group we use simple physical tests to predict the brace type the patient is most likely to benefit from. Based on these physical tests we have developed a simple functional classification of "unspecific" low back pain in patients with spinal deformities. Methods Between January 2006 and July 2007 we have tested 130 patients (116 females and 14 males) with spinal deformities (average age 45 years, ranging from 14 years to 69) and chronic unspecific low back pain (pain for > 24 months) along with the indication for brace treatment for chronic unspecific low back pain. Some of the patients had symptoms of spinal claudication (n = 16). The "sagittal realignment test" (SRT) was applied, a lumbar hyperextension test, and the "sagittal delordosation test" (SDT). Additionally 3 female patients with spondylolisthesis were tested, including one female with symptoms of spinal claudication and 2 of these patients were 14 years of age and the other 43yrs old at the time of testing. Results 117 Patients reported significant pain release in the SRT and 13 in the SDT (>/= 2 steps in the Roland & Morris VRS). 3 Patients had no significant pain release in both of the tests (< 2 steps in the Roland & Morris VRS). Pain intensity was high (3,29) before performing the physical tests (VRS-scale 0–5) and low (1,37) while performing the physical test for the whole sample of patients. The differences where highly significant in the Wilcoxon test (z = -3,79; p < 0,0001). In the 16 patients who did not respond to the SRT in the manual investigation we found hypermobility at L5/S1 or a spondylolisthesis at level L5/S1. In the other patients who responded well to the SRT loss of lumbar lordosis was the main issue, a finding which, according to scientific literature, correlates well with low back pain. The 3 patients who did not respond to either test had a fair pain reduction in a generally delordosing brace with an isolated small foam pad inserted at the level of L 2/3, leading to a lordosation at this region. Discussion With the exception of 3 patients (2.3%) a clear distribution to one of the two classes has been possible. 117 patients were supplied successfully with a sagittal realignment test-brace (physio-logic® brace) and 13 with a sagittal delordosing brace (spondylogic® brace). There were patients with scoliosies and hyperkyphosiesbrace). Therefore a clear distribution of the patients from this sample to either chronic postural or chronic instability back pain was possible. In 2.3% a combined chronic low back pain from the findings obtained seems reasonable. Conclusion Chronic unspecific low back pain is possible to clearly be classified physically. This functional classification is necessary to decide on which specific conservative approach (physical therapy, braces) should be used. Other factors than spinal deformities contribute to chronic low back pain. PMID:19222845

  13. Using Response-Time Constraints in Item Selection To Control for Differential Speededness in Computerized Adaptive Testing. LSAC Research Report Series.

    ERIC Educational Resources Information Center

    van der Linden, Wim J.; Scrams, David J.; Schnipke, Deborah L.

    This paper proposes an item selection algorithm that can be used to neutralize the effect of time limits in computer adaptive testing. The method is based on a statistical model for the response-time distributions of the test takers on the items in the pool that is updated each time a new item has been administered. Predictions from the model are…

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

    SciTech Connect

    Christopher R. Shadix; Joel Lipkin

    1999-11-01

    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).

  15. Recent developments of time series analysis in environmental impact studies

    Microsoft Academic Search

    Chung Chen

    1991-01-01

    Time series analysis, particularly intervention analysis, is commonly employed in impact studies of environmental data. Environmental time series are susceptible to exogenous variations and often contain various types of outliers. Outliers, depending upon the time of their occurrences and nature, can have substantial impact on the estimates of intervention effects and their test statistics. Hence, outlier detection and adjustment should

  16. Aging Effects on the Structure Underlying Balance Abilities Tests

    PubMed Central

    Kinugasa, Takashi; Soma, Yuki; Miyoshi, Hirokazu

    2010-01-01

    Balance impairment is one of the biggest risk factors for falls reducing inactivity, resulting in nursing care. Therefore, balance ability is crucial to maintain the activities of independent daily living of older adults. Many tests to assess balance ability have been developed. However, few reports reveal the structure underlying results of balance performance tests comparing young and older adults. Covariance structure analysis is a tool that is used to test statistically whether factorial structure fits data. This study examined aging effects on the factorial structure underlying balance performance tests. Participants comprised 60 healthy young women aged 22 ± 3 years (young group) and 60 community-dwelling older women aged 69 ± 5 years (older group). Six balance tests: postural sway, one-leg standing, functional reach, timed up and go (TUG), gait, and the EquiTest were employed. Exploratory factor analysis revealed that three clearly interpretable factors were extracted in the young group. The first factor had high loadings on the EquiTest, and was interpreted as ‘Reactive’. The second factor had high loadings on the postural sway test, and was interpreted as ‘Static’. The third factor had high loadings on TUG and gait test, and was interpreted as ‘Dynamic’. Similarly, three interpretable factors were extracted in the older group. The first factor had high loadings on the postural sway test and the EquiTest and therefore was interpreted as ‘Static and Reactive’. The second factor, which had high loadings on the EquiTest, was interpreted as ‘Reactive’. The third factor, which had high loadings on TUG and the gait test, was interpreted as ‘Dynamic’. A covariance structure model was applied to the test data: the second-order factor was balance ability, and the first-order factors were static, dynamic and reactive factors which were assumed to be measured based on the six balance tests. Goodness-of-fit index (GFI) of the models were acceptable (young group, GFI=0.931; older group, GFI=0.923). Static, dynamic and reactive factors relating to balance ability had loadings 0.21, 0.24, and 0.76 in the young group and 0.71, 0.28, and 0.43 in the older group, respectively. It is suggested that the common factorial structure of balance abilities were static, dynamic and reactive, and that for young people reactive balance ability was characterized and explained by balance ability, whereas for older people it was static balance ability. PMID:25792890

  17. Aging effects on the structure underlying balance abilities tests.

    PubMed

    Urushihata, Toshiya; Kinugasa, Takashi; Soma, Yuki; Miyoshi, Hirokazu

    2010-01-01

    Balance impairment is one of the biggest risk factors for falls reducing inactivity, resulting in nursing care. Therefore, balance ability is crucial to maintain the activities of independent daily living of older adults. Many tests to assess balance ability have been developed. However, few reports reveal the structure underlying results of balance performance tests comparing young and older adults. Covariance structure analysis is a tool that is used to test statistically whether factorial structure fits data. This study examined aging effects on the factorial structure underlying balance performance tests. Participants comprised 60 healthy young women aged 22 ± 3 years (young group) and 60 community-dwelling older women aged 69 ± 5 years (older group). Six balance tests: postural sway, one-leg standing, functional reach, timed up and go (TUG), gait, and the EquiTest were employed. Exploratory factor analysis revealed that three clearly interpretable factors were extracted in the young group. The first factor had high loadings on the EquiTest, and was interpreted as 'Reactive'. The second factor had high loadings on the postural sway test, and was interpreted as 'Static'. The third factor had high loadings on TUG and gait test, and was interpreted as 'Dynamic'. Similarly, three interpretable factors were extracted in the older group. The first factor had high loadings on the postural sway test and the EquiTest and therefore was interpreted as 'Static and Reactive'. The second factor, which had high loadings on the EquiTest, was interpreted as 'Reactive'. The third factor, which had high loadings on TUG and the gait test, was interpreted as 'Dynamic'. A covariance structure model was applied to the test data: the second-order factor was balance ability, and the first-order factors were static, dynamic and reactive factors which were assumed to be measured based on the six balance tests. Goodness-of-fit index (GFI) of the models were acceptable (young group, GFI=0.931; older group, GFI=0.923). Static, dynamic and reactive factors relating to balance ability had loadings 0.21, 0.24, and 0.76 in the young group and 0.71, 0.28, and 0.43 in the older group, respectively. It is suggested that the common factorial structure of balance abilities were static, dynamic and reactive, and that for young people reactive balance ability was characterized and explained by balance ability, whereas for older people it was static balance ability. PMID:25792890

  18. Test Report: Direct and Indirect Lightning Effects on Composite Materials

    NASA Technical Reports Server (NTRS)

    Evans, R. W.

    1997-01-01

    Lightning tests were performed on composite materials as a part of an investigation of electromagnetic effects on the materials. Samples were subjected to direct and remote simulated lightning strikes. Samples included various thicknesses of graphite filament reinforced plastic (GFRP), material enhanced by expanded aluminum foil layers, and material with an aluminum honeycomb core. Shielding properties of the material and damage to the sample surfaces and joints were investigated. Adding expanded aluminum foil layers and increasing the thickness of GFRP improves the shielding effectiveness against lightning induced fields and the ability to withstand lightning strikes. A report describing the lightning strike tests performed by the U.S. Army Redstone Technical Test Center, Redstone Arsenal, AL, STERT-TE-E-EM, is included as an appendix.

  19. April 24, 2001 Radiation Tests for Single Event Effects

    E-print Network

    .2 × 109 2.6 × 1010 (5.66 × 1010 max) Mezzanine Card 7.00 × 109 3.5 × 1010 ADC integrator 2.80 × 109 1-mail: Richard.Teuscher@cern.ch, spano@hep.uchicago.edu Proton irradiation tests for single event effects

  20. Self test system for integrated hall effect sensors

    Microsoft Academic Search

    Mihai-Alexandru Ionescu; Christof Bodner; Stefan Dineci; Gheorghe Brezeanu

    2009-01-01

    This paper presents a new way to test integrated Hall effect sensors, by converting the internal measured parameters into other parameters, which can be measured more easily, with less complex equipment and in a shorter time. A comparison between SPICE, and Simulink simulations and with an analytical model is achieved, in order to evaluate the precision of the method.

  1. The Testing Effect Is Alive and Well with Complex Materials

    ERIC Educational Resources Information Center

    Karpicke, Jeffrey D.; Aue, William R.

    2015-01-01

    Van Gog and Sweller (2015) claim that there is no testing effect--no benefit of practicing retrieval--for complex materials. We show that this claim is incorrect on several grounds. First, Van Gog and Sweller's idea of "element interactivity" is not defined in a quantitative, measurable way. As a consequence, the idea is applied…

  2. 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...

  3. Profile-guided program simplification for effective testing and analysis

    Microsoft Academic Search

    Lingxiao Jiang; Zhendong Su

    2008-01-01

    Many testing and analysis techniques have been developed for in- house use. Although they are effective at discovering defects be- fore a program is deployed, these techniques are often limit ed due to the complexity of real-world code and thus miss program faults. It will be the users of the program who eventually experience fail- ures caused by the undetected

  4. EFFECTS OF TESTS AND QUALITY CONTROL ON AIRCRAFT STRUCTURAL SAFETY

    Microsoft Academic Search

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

    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

  5. Neurobehavioral Effects of Space Radiation on Psychomotor Vigilance Tests

    Microsoft Academic Search

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

    2010-01-01

    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

  6. Effects of basestock and additive chemistry on traction testing

    Microsoft Academic Search

    Michael T. Costello

    2005-01-01

    Over the past few years there have been numerous papers and articles published using the Mini-Traction Machine (MTM) test rig for transport lubricant applications. This rig has gained popularity by allowing the measurement of both high and low entrainment speeds in a single instrument. In this study, the MTM clearly demonstrates the effects of friction modifier on high and low

  7. A simple method for effective multi-site generation of stochastic hydrologic time series

    Microsoft Academic Search

    Nesa Ilich; Jovan Despotovic

    2008-01-01

    This paper presents an algorithm for generating stationary stochastic hydrologic time series at multiple sites. The ideas\\u000a in this paper constitute a radical departure from commonly accepted methodologies. The approach relies on the recent advances\\u000a in statistical science for simulating random variables with arbitrary marginal distributions and a given covariance structure,\\u000a and on an algorithm for re-ordering the generated sub-sets

  8. System size effects and N/Z dependence of balance energy for different isotopic series

    E-print Network

    Aman D. Sood; Sakshi Gautam

    2011-12-13

    We study the N/Z dependence of energy of vanishing flow or balance energy for different isotopic series of various system masses like Ca+Ca, Ni+Ni, Zr+Zr, Sn+Sn and Xe+Xe. We find that balance energy decreases with N/Z of the system and follows a linear behaviour. The slope of N/Z dependence is steeper for lighter systems like Ca+Ca and less for heavier ones like Xe+Xe.

  9. Cosmo-physical effects in the time series of the GCP network

    E-print Network

    S. E. Shnoll; V. A. Panchelyuga

    2006-05-07

    In the GCP network, an Internet system of noise generators developed under the direction of Prof. R. Nelson and deployed at various geographical points, synchronous measurements of a priori random noise processes are carried out every second. The time series obtained in these measurements are "quite random" from the viewpoint of traditional methods of statistical analysis. However, as shown in our works, using the method of histogram comparison allows one to discover clear regularities in the noise processes of any nature, from biochemical reactions to radioactive decay or noise in the gravitational antenna. These regularities cannot be revealed by the traditional methods of time series analysis and seem to be determined by fluctuations of the space-time, which result from the movement of the "laboratory" relative to the mass thicknesses (celestial bodies). The application of this method to the analysis of time series of the GCP system showed all the main regularities described earlier: the histogram pattern changes with well-resolved sidereal and solar daily periods; at different geographical points, similar histogram patterns are highly probable to appear at the same local time; histograms with a specific "eclipse" pattern appear synchronously "all over the Earth" at the moments of culmination of a solar eclipse.

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

    ERIC Educational Resources Information Center

    Busbee, Cyril B.

    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…

  11. Effect of parasitic series resistances and spurious currents on the extracted temperature of a bipolar junction transistor.

    PubMed

    Mimila-Arroyo, J

    2013-12-01

    Verster's proposition to directly extract the temperature of a bipolar junction transistor using its collector current is widely used. However, the resulting temperature is low accurate even when calibrated. Here, it is demonstrated that the misuse of the emitter current instead of the collector one, because of the presence of spurious currents other than the injection-diffusion one and transistor parasitic series resistances both contribute to the observed inaccuracy. Particularly parasitic series resistances increase the inaccuracy and introduce a strong dependence of the extracted temperature on the collector currents used to extract the temperature; the higher those resistances the higher the inaccuracy. A proposition is made to reduce the effect of those resistances on the inaccuracy of this thermometric element, which allows obtaining a more accurate value on a wider range of the collector probe currents. PMID:24387455

  12. Metal-ion-specific screening of charge effects in protein amide H/D exchange and the Hofmeister series.

    PubMed

    Abdolvahabi, Alireza; Gober, Jennifer L; Mowery, Richard A; Shi, Yunhua; Shaw, Bryan F

    2014-10-21

    In this study, protein charge ladders and mass spectrometry were used to quantify how metal cations in the Hofmeister series (Na(+), K(+), Li(+), Mg(2+), and Ca(2+)) permute the effects of lysine acetylation on the rate of amide H/D exchange in a representative protein (myoglobin, Mb). The successive acetylation of up to 18 Lys-?-NH3(+) groups in Mb caused a linear decrease in its global rate of amide H/D exchange (as measured by mass spectrometry), despite also decreasing the thermostability of Mb by >10 °C. The ability of a metal cation to screen kinetic electrostatic effects during H/D exchange-and to abolish the protective effect of acetylation against H/D exchange-was found to depend on the position of the cation in the Hofmeister series. Na(+) and K(+) cations did not fully equalize the rates of H/D exchange among each "rung" of the charge ladder, whereas Mg(2+) and Ca(2+) did equalize rates without eliminating the hydrophobic core of the protein (i.e., without unfolding Mb); Li(+) exhibited intermediate effects. The ability of Mg(2+) and Ca(2+) to completely screen electrostatic effects associated with the H/D exchange of charge isomers of Mb suggests that Mg(2+) or Ca(2+) (but not Na(+) or K(+)) can be used to quantify the magnitude by which electrostatic charge contributes to the observed rates of amide H/D exchange in proteins. PMID:25207790

  13. Electron transport studies in rhombohedral series of Al-doped LaMnO3+?: an effective medium approach

    NASA Astrophysics Data System (ADS)

    Krishnan, R. V.; Banerjee, A.

    2000-09-01

    We report the electron transport studies in the rhombohedral LaMn1-xAlxO3+? series (0?x?20%) of samples. Though all the samples are ferromagnetic below a transition temperature (TC), only the samples with x?5% exhibit a metal-insulator transition (MIT) at TC while the samples with x?10% are all semiconducting above and below TC. The sample with x = 7.5% is a borderline case where MIT at TC is immediately taken over by semiconducting behaviour at lower temperatures. Thus a progressive crossover from ferromagnetic-metallic state to ferromagnetic-insulating state is observed in this series within the same structure. This is accompanied by a decrease in Mn4+ content across the magnetic and conduction percolation thresholds. This systematic crossover from a double exchange dominated regime to an exclusively superexchange regime, preserving the rhombohedral symmetry, makes the present series an important and unique one for the study of electron transport in the colossal magnetoresistance manganites. An effective medium approach is employed to explain the resistivity behaviour in this series over the whole temperature range, which gives strong support for polaronic conduction in all the samples. This polaronic conduction justifies the presence of dynamic Jahn-Teller effects in the samples and the change in the character of polarons across TC illustrates the role of electron-lattice interaction as well as its coupling to magnetic states (core spins) of the samples. The dominance of double exchange is evident from metallic resistivity in the samples with x?5% which have Mn4+ much above the percolation threshold for metallicity. However the observed non-trivial temperature dependence of metallic resistivity could not be explained by double exchange alone and it is shown in this study that one needs to take into account superexchange interactions even in the double exchange dominated regime to understand the electron transport, thus supporting the current understanding in these pervoskite manganites.

  14. Diagnostic Tests for Systematic Effects on Large Scale Structure

    NASA Astrophysics Data System (ADS)

    Wang, Yiran; Brunner, R. J.

    2013-06-01

    With the growth in current and future large photometric surveys, the quantification and mitigation of systematic effects that might bias clustering measurements has become more acute than ever. Therefore, we present specific diagnostic tests that we developed and tested on the SDSS DR7. Specifically, we present results that quantify, in a consistent manner, the effects due to variations in seeing, Galactic extinction, and stellar contamination. Our approach is based on pixelizing the data, in a similar manner to Scranton et l (2002), below the physical scale of the different systematics and comparing the cross-correlation of a specific systematic with the target population to identify the optimal systematic cut to minimize the effect on the desired signal. In our analysis, we found that by using HEALPix, we recovered a less biased measurement than by using SDSSPix, but SDSSPix was optimal in recovering the density variation within a stripe due to its consistency with the survey geometry.

  15. Effects of different combinations of environmental tests on the reliability of UHF RFID tags

    Microsoft Academic Search

    Kirsi Saarinen; Laura Frisk; Leena Ukkonen

    2011-01-01

    Accelerated environmental tests can be used to study the effects of environmental stresses on reliability. Typically environmental tests are used in parallel so that only one test is performed for test samples and new test samples are used in another test. However, different tests one after another for the same test samples may describe the operational environment better and give

  16. Experimental and Structural Testing Module to Analyze Paralogue-Specificity and Affinity in the Hsp90 Inhibitors Series

    PubMed Central

    Taldone, Tony; Patel, Pallav D.; Patel, Maulik; Patel, Hardik J.; Evans, Christopher E.; Rodina, Anna; Ochiana, Stefan; Shah, Smit K.; Uddin, Mohammad; Gewirth, Daniel; Chiosis, Gabriela

    2014-01-01

    We here describe the first reported comprehensive analysis of Hsp90 paralogue affinity and selectivity in the clinical Hsp90 inhibitor chemotypes. This has been possible through the development of a versatile experimental assay based on a new FP-probe (16a) that we both describe here. The assay can test rapidly and accurately the binding affinity of all major Hsp90 chemotypes and has a testing range that spans low nanomolar to millimolar binding affinities. We couple this assay with a computational analysis that allows for rationalization of paralogue selectivity and defines not only the major binding modes that relay pan-paralogue binding or, conversely, paralogue selectivity, but also identifies molecular characteristics that impart such features. The methods developed here provide a blueprint for parsing out the contribution of the four Hsp90 paralogues to the perceived biological activity with the current Hsp90 chemotypes and set the ground for the development of paralogue selective inhibitors. PMID:23965125

  17. Minimal preconditioning effects observed for inflation tests of planar tissues.

    PubMed

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

    2013-11-01

    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

  18. Development of Methods to Predict the Effects of Test Media in Ground-Based Propulsion Testing

    NASA Technical Reports Server (NTRS)

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

    2009-01-01

    This report discusses work that began in mid-2004 sponsored by the Office of the Secretary of Defense (OSD) Test & Evaluation/Science & Technology (T&E/S&T) Program. The work was undertaken 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 had several components including the development of advanced 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. This report provides details of the completed work, involving the development of phenomenological models for Reynolds averaged Navier-Stokes codes, large-eddy simulation techniques and reduced-kinetics models. Experiments that provided data for the modeling efforts are also described, along with with the associated nonintrusive diagnostics used to collect the data.

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

    NASA Technical Reports Server (NTRS)

    Robson, R. R.

    1982-01-01

    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.

  20. Fuel effects on the TF30 engine (Alternate test procedure)

    SciTech Connect

    Karpovich, P.A.; Musters, A.I.

    1984-09-01

    The objective of the Alternate Test Procedure (ATP) is to develop the capability to qualify new fuels for Navy aircraft use with a minimum of testing. The effect of fuel composition and properties on engine performance and component life has been shown to vary significantly from one engine configuration to another. The PandWA approach to the ATP has been to define fuel effects on the TF30 engine and then apply the methodology to other engines of interest to the Navy. Investigations of the TF30 conducted under the ATP Program and other Navy and Air Force Contracts have produced one of the most complete fuel effect characterizations available for any gas turbine engine. Major fuel effects which have been quantified are the relationships of lubricity to main fuel control reliability, viscosity and volatility to main burner and augmentor ignition limits, and hydrogen content to smoke and combustor life. The effects of fuel properties and composition on combustion efficiency and elastomeric seal life were found to be of secondary importance. Remaining uncertainties are the effects of fuel properties on turbine life and fuel nozzle fouling rate.

  1. Boussignac CPAP system for brain death confirmation with apneic test in case of acute lung injury/adult respiratory distress syndrome – series of cases

    PubMed Central

    Wieczorek, Andrzej; Gaszynski, Tomasz

    2015-01-01

    Introduction There are some patients with severe respiratory disturbances like adult respiratory distress syndrome (ARDS) and suspicion of brain death, for whom typical performance of the apneic test is difficult to complete because of quick desaturation and rapid deterioration without effective ventilation. To avoid failure of brain death confirmation and possible loss of organ donation another approach to apneic test is needed. We present two cases of patients with clinical symptoms of brain death, with lung pathology (acute lung injury, ARDS, lung embolism and lung infection), in whom apneic tests for recognizing brain death were difficult to perform. During typical performance of apneic test involving the use of oxygen catheter for apneic oxygenation we observed severe desaturation with growing hypotension and hemodynamic destabilization. But with the use of Boussignac CPAP system all necessary tests were successfully completed, confirming the patient’s brain death, which gave us the opportunity to perform procedures for organ donation. The main reason of apneic test difficulties was severe gas exchange disturbances secondary to ARDS. Thus lack of positive end expiratory pressure during classical performance of apneic test leads to quick desaturation and rapid hemodynamic deterioration, limiting the observation period below dedicated at least 10-minute interval. Conclusion The Boussignac CPAP system may be an effective tool for performing transparent apneic test in case of serious respiratory disturbances, especially in the form of acute lung injury or ARDS. PMID:26124664

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

    PubMed

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

    2012-04-01

    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

  3. Short term effect of rainfall on suspected malaria episodes at Magaria, Niger: a time series study.

    PubMed

    Jusot, Jean-François; Alto, Oumarou

    2011-11-01

    Epidemiological patterns of malaria are influenced by different kinds of climate. In Sahelian countries, the link between climatic factors and malaria is still insufficiently quantified. The aim of this work was to conduct a time-series study of rainfall to estimate the increased risk of malaria morbidity. Daily suspected malaria episodes among subjects of all ages were collected retrospectively in three health care facilities between 1 January 2000 and 31 December 2003 at Magaria, Niger. These daily numbers were analysed with time-series methods, using generalized additive models with a negative binomial family. The impact of rainfall 40 days before occurrence of suspected malaria episodes was studied using a distributed lag model. More than 13 000 suspected malaria episodes were registered corresponding to an annual cumulative incidence rate of 7.4%. The overall excess risk of suspected malaria episodes for an increase of 1mm of rainfall after 40 days of exposure was estimated at 7.2%. This study allowed to specify the excess risk of rainfall on the occurrence of suspected malaria episodes in an intermediate rainfall area located in the Sahelian region in Niger. It was a first step to a health impact assessment. PMID:21925691

  4. Comprehensive mathematical simulation of functional magnetic resonance imaging time series including motion-related image distortion and spin saturation effect.

    PubMed

    Kim, Boklye; Yeo, Desmond T B; Bhagalia, Roshni

    2008-02-01

    There has been vast interest in determining the feasibility of functional magnetic resonance imaging (fMRI) as an accurate method of imaging brain function for patient evaluations. The assessment of fMRI as an accurate tool for activation localization largely depends on the software used to process the time series data. The performance evaluation of different analysis tools is not reliable unless truths in motion and activation are known. Lack of valid truths has been the limiting factor for comparisons of different algorithms. Until now, currently available phantom data do not include comprehensive accounts of head motion. While most fMRI studies assume no interslice motion during the time series acquisition in fMRI data acquired using a multislice and single-shot echo-planar imaging sequence, each slice is subject to a different set of motion parameters. In this study, in addition to known three-dimensional motion parameters applied to each slice, included in the time series computation are geometric distortion from field inhomogeneity and spin saturation effect as a result of out-of-plane head motion. We investigated the effect of these head motion-related artifacts and present a validation of the mapping slice-to-volume (MSV) algorithm for motion correction and activation detection against the known truths. MSV was evaluated, and showed better performance in comparison with other widely used fMRI data processing software, which corrects for head motion with a volume-to-volume realignment method. Furthermore, improvement in signal detection was observed with the implementation of the geometric distortion correction and spin saturation effect compensation features in MSV. PMID:17662548

  5. Flyover and static tests to investigate external flow effect on jet noise from nonsuppressor and suppressor exhaust nozzles

    NASA Technical Reports Server (NTRS)

    Burley, R. R.; Karabinus, R. J.

    1972-01-01

    The effect of external air flowing across exhaust nozzles on the jet noise characteristics of supersonic transport aircraft at high takeoff speeds was investigated. A series of flyover and static tests were conducted using an F-106B aircraft modified with two underwing nacelles each containing a calibrated J85-GE-13 turbojet engine. Comparison of flyover and static data indicated that external flow reduces the noise of an auxiliary inlet ejector nozzle. An unsuppressed plug nozzle was not affected while the plug suppressor configurations were not as effective in flight.

  6. Effects of vessel geometric irregularity on dissolution test results.

    PubMed

    Gao, Zongming; Ahadi, Shafiq; Moore, Terry W; Doub, William H; Westenberger, B J; Buhse, Lucinda F

    2011-03-01

    Dissolution testing of pharmaceutical products is an important technique used extensively for both product development and quality control, but there are many variables that can affect dissolution results. In this study, the effect of the inner shape of standard 1-L dissolution vessels on drug dissolution results was investigated. The geometric dimensions and irregularities of commercially available vessels (obtained from four different manufacturers) were examined using a three-dimensional video-based measuring machine (VMM). The same analyst, dissolution test assembly, and experimental conditions were used for dissolution testing involving 10 mg of prednisone tablets (NCDA #2) with dissolution apparatus 2 (paddle). Mechanical calibration of the dissolution apparatus was performed prior to dissolution testing with each set of vessels. Geometric characteristics varied within and among the sets of vessels, but the overall averages and standard deviations of dissolution results (six vessels) showed no statistical significant differences among the vessel sets. However, some dissolution differences were noted when comparing individual vessels. With these types of comparisons, the vessel concentricity, sphericity, and radius of sphere were found to possibly influence the amount of prednisone dissolved, but flatness of vessel flange, cylindricity, and circularity showed no effect on dissolution results. The study shows that VMM is a technique that could be used to qualify dissolution vessels. PMID:20803604

  7. Test of "Light" cigarette counter-advertising using a standard test of advertising effectiveness

    PubMed Central

    Shiffman, S.; Burton, S.; Pillitteri, J.; Gitchell, J.; Di, M; Sweeney, C.; Wardle, P.; Koehler, G.

    2001-01-01

    OBJECTIVE—To evaluate systematically the effectiveness of six advertising strategies (two message strategies presented in three different contexts) designed to promote smoking cessation by addressing smokers' misperceptions about Light cigarettes.?DESIGN—Smokers viewed one of six, 30 second test television concept advertisements, which varied by message (one emphasising how the sensory effects of Lights can be deceptive, the other describing the effects of vent blocking) and by ad context (non-commercial public service announcement (PSA), promotion of unbranded nicotine replacement therapy (NRT), or promotion of branded NRT). The effectiveness of each advertisement was determined using a validated advertising testing system in which ads were viewed in the context of reviewing a pilot television programme. Response to ads is assessed through shifts in subject choices of products offered as prizes before and after viewing the test advertisements. Included among the possible prizes were cigarettes and various pharmacotherapies for smoking cessation.?SUBJECTS—Daily smokers (n = 1890) of Regular (34%), Light (47%), and Ultra Light (19%) cigarettes recruited from eight US cities.?MAIN OUTCOMES MEASURES—The primary outcome of interest was the shift away from cigarettes as the selected prize following exposure to the test advertisements. Secondary outcomes of interest included movement away from Light cigarettes and movement towards assisted quitting products.?RESULTS—Smokers who saw the advertisement emphasising the sensory characteristics of Light cigarettes were more likely than subjects who saw the advertisement emphasising the effect of vent blocking to move away from cigarettes (OR = 1.97, 95% confidence interval CI 1.25 to 3.09; ?2(1) = 8.69, p = 0.003). Similarly, subjects who saw the advertisement framed as a PSA, rather than as a promotion for either a branded or unbranded NRT product, were also somewhat more likely to move away from cigarettes (OR = 1.51, 95% CI 0.94 to 2.40; ?2(1) = 2.97, p = 0.085). The effect was observed regardless of sex, age, or type of cigarette smoked.?CONCLUSIONS—Addressing smokers' sensory perceptions of Light cigarettes and presenting this information in an impartial way is likely to be an effective communication strategy for counter-marketing Light cigarettes.???Keywords: Lights; advertising; counter-marketing PMID:11740042

  8. Acute and Subacute Effects of Urban Air Pollution on Cardiopulmonary Emergencies and Mortality: Time Series Studies in Austrian Cities

    PubMed Central

    Neuberger, Manfred; Moshammer, Hanns; Rabczenko, Daniel

    2013-01-01

    Daily pollution data (collected in Graz over 16 years and in the Linz over 18 years) were used for time series studies (GAM and case-crossover) on the relationship with daily mortality (overall and specific causes of death). Diagnoses of patients who had been transported to hospitals in Linz were also available on a daily basis from eight years for time series analyses of cardiopulmonary emergencies. Increases in air pollutant levels over several days were followed by increases in mortality and the observed effects increased with the length of the exposure window considered, up to a maximum of 15 days. These mortality changes in Graz and Linz showed similar patterns like the ones found before in Vienna. A significant association of mortality could be demonstrated with NO2, PM2.5 and PM10 even in summer, when concentrations are lower and mainly related to motor traffic. Cardiorespiratory ambulance transports increased with NO2/PM2.5/PM10 by 2.0/6.1/1.7% per 10 µg/m3 on the same day. Monitoring of NO2 (related to motor traffic) and fine particulates at urban background stations predicts acute effects on cardiopulmonary emergencies and extended effects on cardiopulmonary mortality. Both components of urban air pollution are indicators of acute cardiopulmonary health risks, which need to be monitored and reduced, even below current standards. PMID:24157504

  9. 30 CFR 35.22 - Test to determine effect of evaporation on flammability.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 1 2010-07-01 2010-07-01 false Test to determine effect of evaporation on flammability...MINING PRODUCTS FIRE-RESISTANT HYDRAULIC FLUIDS Test Requirements § 35.22 Test to determine effect of evaporation on...

  10. 30 CFR 35.22 - Test to determine effect of evaporation on flammability.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 1 2012-07-01 2012-07-01 false Test to determine effect of evaporation on flammability...MINING PRODUCTS FIRE-RESISTANT HYDRAULIC FLUIDS Test Requirements § 35.22 Test to determine effect of evaporation on...

  11. 49 CFR 40.273 - What is the effect of a cancelled alcohol test?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 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...

  12. 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 40.273 Transportation...PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS Problems in Alcohol Testing § 40.273 What is the effect...

  13. Summary of the Wisconsin Test Facility effective earth conductivity measurements

    Microsoft Academic Search

    Peter R. Bannister

    1976-01-01

    The effective conductivity of the geoelectrically complex Wisconsin Test Facility area has been measured by a number of different methods during the past few years. These methods include the H\\/I induction method, the wave impedance measurement technique (employing lightning discharges as the source), and two direct current methods ,the four-terminal-array in-line dipole and Schlumberger techniques). The principal results obtained from

  14. Size Effects in the Charpy V-Notch Test

    Microsoft Academic Search

    A. A. Benzerga; V. Tvergaard; A. Needleman

    2002-01-01

    Issues related to the size dependence of the upper shelf energy (USE) and the ductile-to-brittle transition temperature (DBTT) in the Charpy V-notch test are investigated. Emphasis is placed on the interplay between inertial, strain rate hardening, strain hardening, thermal softening and material length scale effects. Geometrically similar specimens are considered first. For such specimens, the ductile-to-brittle transition temperature is found

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

    SciTech Connect

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

    2009-04-01

    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.

  16. Pedigree-based random effect tests to screen gene pathways.

    PubMed

    Almeida, Marcio; Peralta, Juan M; Farook, Vidya; Puppala, Sobha; Kent, John W; Duggirala, Ravindranath; Blangero, John

    2014-01-01

    The new generation of sequencing platforms opens new horizons in the genetics field. It is possible to exhaustively assay all genetic variants in an individual and search for phenotypic associations. The whole genome sequencing approach, when applied to a large human sample like the San Antonio Family Study, detects a very large number (>25 million) of single nucleotide variants along with other more complex variants. The analytical challenges imposed by this number of variants are formidable, suggesting that methods are needed to reduce the overall number of statistical tests. In this study, we develop a single degree-of-freedom test of variants in a gene pathway employing a random effect model that uses an empirical pathway-specific genetic relationship matrix as the focal covariance kernel. The empirical pathway-specific genetic relationship uses all variants (or a chosen subset) from gene members of a given biological pathway. Using SOLAR's pedigree-based variance components modeling, which also allows for arbitrary fixed effects, such as principal components, to deal with latent population structure, we employ a likelihood ratio test of the pathway-specific genetic relationship matrix model. We examine all gene pathways in KEGG database gene pathways using our method in the first replicate of the Genetic Analysis Workshop 18 simulation of systolic blood pressure. Our random effect approach was able to detect true association signals in causal gene pathways. Those pathways could be easily be further dissected by the independent analysis of all markers. PMID:25519354

  17. Effects of temperature on in situ toxicity testing

    SciTech Connect

    Rowland, C.D.; Burton, G.A. Jr. [Wright State Univ., Dayton, OH (United States)

    1994-12-31

    With increasing concern over the impacts and perturbations to receiving waters as a result of storm water runoff and contaminated sediments, many investigators have turned towards in situ testing for direct response data. In situ testing has been shown to be an effective assessment tool. In order to further evaluate the limitations of this method, temperature effects were evaluated. There is concern that laboratory to stream transfer of test organisms may induce significant stress if water temperatures are too cool. This study was designed to specifically address the issue of temperature tolerance and attenuation of Hyalella azteca, Ceriodaphnia dubia and Pimephales promelas in in situ conditions. Temperature tolerance is of importance in areas where receiving waters are subject to low or fluctuating temperatures as well as areas of more temperate climates. In this study, the organisms where exposed to temperatures as low as 2 C for variable lengths of time, removed and allowed to come to ambient laboratory temperatures then monitored for acute or chronic responses. No effects on survival were observed after 48 h. at 5 C; however lower temperatures increased mortality.

  18. Anti-diabetic effects of a series of vanadium dipicolinate complexes in rats with streptozotocin-induced diabetes.

    PubMed

    Willsky, Gail R; Chi, Lai-Har; Godzala, Michael; Kostyniak, Paul J; Smee, Jason J; Trujillo, Alejandro M; Alfano, Josephine A; Ding, Wenjin; Hu, Zihua; Crans, Debbie C

    2011-10-01

    The effects of oral treatment of rats with streptozotocin-induced diabetes with a range of vanadium dipicolinate complexes (Vdipic) and derivatives are reviewed. Structure-reactivity relationships are explored aiming to correlate properties such as stability, to their insulin-enhancing effects. Three types of modifications are investigated; first, substitutions on the aromatic ring, second, coordination of a hydroxylamido group to the vanadium, and third, changes in the oxidation state of the vanadium ion. These studies allowed us to address the importance of coordination chemistry, and redox chemistry, as modes of action. Dipicolinate was originally chosen as a ligand because the dipicolinatooxovanadium(V) complex (V5dipic), is a potent inhibitor of phosphatases. The effect of vanadium oxidation state (3, 4 or 5), on the insulin-enhancing properties was studied in both the Vdipic and VdipicCl series. Effects on blood glucose, body weight, serum lipids, alkaline phosphatase and aspartate transaminase were selectively monitored. Statistically distinct differences in activity were found, however, the trends observed were not the same in the Vdipic and VdipicCl series. Interperitoneal administration of the Vdipic series was used to compare the effect of administration mode. Correlations were observed for blood vanadium and plasma glucose levels after V5dipic treatment, but not after treatment with corresponding V4dipic and V3dipic complexes. Modifications of the aromatic ring structure with chloride, amine or hydroxyl groups had limited effects. Global gene expression was measured using Affymetrix oligonucleotide chips. All diabetic animals treated with hydroxyl substituted V5dipic (V5dipicOH) and some diabetic rats treated with vanadyl sulfate had normalized hyperlipidemia yet uncontrolled hyperglycemia and showed abnormal gene expression patterns. In contrast to the normal gene expression profiles previously reported for some diabetic rats treated with vanadyl sulfate, where both hyperlipidemia and hyperglycemia were normalized. Modification of the metal, changing the coordination chemistry to form a hydroxylamine ternary complex, had the most influence on the anti-diabetic action. Vanadium absorption into serum was determined by atomic absorption spectroscopy for selected vanadium complexes. Only diabetic rats treated with the ternary V5dipicOH hydroxylamine complex showed statistically significant increases in accumulation of vanadium into serum compared to diabetic rats treated with vanadyl sulfate. The chemistry and physical properties of the Vdipic complexes correlated with their anti-diabetic properties. Here, we propose that compound stability and ability to interact with cellular redox reactions are key components for the insulin-enhancing activity of vanadium compounds. Specifically, we found that the most overall effective anti-diabetic Vdipic compounds were obtained when the compound administered had an increased coordination number in the vanadium complex. PMID:23049138

  19. Testing of QED-Theory and Precise Measurements of the Rydberg Series for the He-Like Multicharged Ions

    NASA Astrophysics Data System (ADS)

    Pal'Chikov, V. G.

    2001-01-01

    The wavelengths of the 1snp 1 P 1-1s 2 1 S 0 transitions in He-like Mg XI, F VIII (n= 4 8) and Al XII (n=6,9) have been calculated in the framework of the 1/Z expansion method including relativistic effects and QED contributions. It is found that QED corrections to the ground-state ionization energy are significant at the present level of experimental accuracy.

  20. Transfer of Mathematical Knowledge: Series

    ERIC Educational Resources Information Center

    Akgun, Levent; Isik, Cemalettin; Tatar, Enver; Isleyen, Tevfik; Soylu, Yasin

    2012-01-01

    The aim of this study is to explain students' ability to transfer their knowledge about mathematical series to the problems that they encounter. The data of the study were obtained by using two different tests, namely "Problem Solving Test (PST)" and "Series Character Identification Test (SCT)" which were developed by the researchers. The study…

  1. Practice effect and test-retest reliability of attentional and executive tests in middle-aged to elderly subjects.

    PubMed

    Lemay, Simon; Bédard, Marc-André; Rouleau, Isabelle; Tremblay, Pierre-Luc Gilbert

    2004-05-01

    There is a lack of data about the practice effect and test-retest reliability (TRR) on many attentional and executive tests in neuropsychology. In this study, 37 subjects aged 52 to 80 were tested three times with an inter-assessment interval of 14 days. The battery included the Rey Auditory Verbal Learning Test, the Stroop interference test, the Letter-Number Sequencing test, Wechsler Adult Intelligence Scale-III (WAIS-III), the Ruff 2 and 7 Selective Attention Test, the Tower of London, the Verbal Fluency test, and simple, choice, and sequential reaction time tests. The results showed that tasks were generally subject to a practice effect, except for those with alternate forms. In all tests, there were a number of scores demonstrating good TRR, but others, although largely used in clinical practice, failed to reach acceptable TRR standards. Usually, time derived scores were associated with the best TRR. PMID:15587675

  2. Variable skin and cleanup effects in well-test data

    SciTech Connect

    Larsen, L.; Kviljo, K.

    1986-01-01

    Methods are introduced to analyze well-test data influenced by variable skin and cleanup effects, with emphasis on problems concerning verifications of consistency in the wellbore pressure behavior during drawdown and buildup periods. The methods are based on both analytical and empirical observations, with field cases included to verify the applicability of the results. It is shown that data influenced by a stable cleanup trend can be modelled by including a simple hyperbolic expression for the skin factor in solutions for wells with constant skin. It is also shown that if the skin effect stabilizes at constant values within the general trend during a drawdown period, then segments of pressure data consistent with buildup data should be detectable. Moreover, if buildup data, or other well-test data free of cleanup effects, are not available, then repetitions of such segments can be used to estimate the flow capacity of the formation and the rate of well cleanup. An important observation in this paper, is that a small gradual reduction in the effective skin factor during a drawdown period, if interpreted as part of the reservoir response, can lead to a gross overestimation of flow capacity and skin. Such a reduction can also produce a constant or nearly constant bottomhole pressure during a period of constant-rate production, thus giving the impression of a steady-state or nearly steady-state condition in the reservoir. However, if the well is strongly influenced by cleanup effects, either gradual or abrupt, then this is more likely to be recognized in well-test data.

  3. Testing human hair for drugs of abuse. IV. Environmental cocaine contamination and washing effects

    Microsoft Academic Search

    Wen Ling Wang; Edward J. Cone

    1995-01-01

    Active cocaine use results in sequestration of parent drug in hair. In addition, hair has unique physicochemical properties that permit absorption of cocaine from the environment. When hair is tested for evidence of cocaine, it is important to consider whether the positive test resulted from active drug use or environmental contamination. In a series of laboratory experiments, it was found

  4. Pressure Effects of Foreign Gases on the Absorption Lines of Cesium. I. The Effects of Argon on the First Two Members of the Principal Series

    Microsoft Academic Search

    Shang Yi Ch'en; Robert O. Garrett

    1966-01-01

    The effect of Ar on both fine-structure components of the first two members of the Cs principal series is described. Experimental procedures are outlined. Cs(1)\\/Ar and Cs(2)\\/Ar measurements are reported up to 300 and 30 atmospheres, respectively. Special emphasis was given to obtaining precise data in the low-pressure region. This emphasis revealed structure heretofore unsuspected. In particular, the plot of

  5. Sagnac Effect, Ring Lasers and Terrestrial Tests of Gravity

    NASA Astrophysics Data System (ADS)

    Ruggiero, Matteo

    2015-05-01

    Light can be used as a probe to explore the structure of space-time: this is usual in astrophysical and cosmological tests, however it has been recently suggested that this can be done also in terrestrial laboratories. Namely, the GINGER project aims at measuring post-Newtonian effects, such as the gravito-magnetic ones, in an Earth based laboratory, by means of a ring lasers array. Here, we first review the theoretical foundations of the Sagnac Effect, on which ring lasers are based, and then we study the Sagnac Effect in a terrestrial laboratory, emphasizing the origin of the gravitational contributions that GINGER aims at measuring. Moreover, we show that accurate measurements allow to set constraints on theories of gravity different from General Relativity. Eventually, we describe the experimental setup of GINGER.

  6. Everybody WINs: Effectively Involving Business in Workforce Development. The First in a Series of Policy Papers.

    ERIC Educational Resources Information Center

    Richards, Carla J.; Herranz, Joaquin, Jr.

    As policymakers have begun reorienting the U.S. work force development system's priorities, a common theme has been the importance of work and training tied to real employment prospects. Workforce Innovation Networks (WINs) was created to test and advance the idea that local employer organizations can play important, productive roles in helping…

  7. 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 ...

  8. Series Crimes

    E-print Network

    Stoutemyer, David R

    2012-01-01

    Puiseux series are power series in which the exponents can be fractional and/or negative rational numbers. Several computer algebra systems have one or more built-in or loadable functions for computing truncated Puiseux series. Some are generalized to allow coe?cients containing functions of the series variable that are dominated by any power of that variable, such as logarithms and nested logarithms of the series variable. Some computer algebra systems also have built-in or loadable functions that compute infinite Puiseux series. Unfortunately, there are some little-known pitfalls in computing Puiseux series. The most serious of these is expansions within branch cuts or at branch points that are incorrect for some directions in the complex plane. For example with each series implementation accessible to you: Compare the value of (z^2 + z^3)^(3/2) with that of its truncated series expansion about z = 0, approximated at z = -0.01. Does the series converge to a value that is the negative of the correct value? C...

  9. Effect of orbital drift and sensor changes on the time series of AVHRR vegetation index data

    Microsoft Academic Search

    Robert K. Kaufmann; Liming Zhou; Yuri Knyazikhin; V. Shabanov; Ranga B. Myneni; Compton J. Tucker

    2000-01-01

    This paper assesses the effect of changes in solar zenith angle (SZA) and sensor changes on reflectances in channel 1, channel 2, and normalized difference vegetation index (NDVI) from the advanced very high resolution radiometer (AVHRR) Pathfinder land data set for the period July 1981 through September 1994. First, the effect of changes in SZA on channel reflectances and NDVI

  10. Manual on Cost-Effectiveness of Training Modalities in Population Education. Population Education Programme Service Series.

    ERIC Educational Resources Information Center

    United Nations Educational, Scientific and Cultural Organization, Bangkok (Thailand). Principal Regional Office for Asia and the Pacific.

    This manual is the result of a regional training workshop on the cost-effectiveness of different training strategies in population education by Unesco in Kathmandu, Nepal, June 1-8, 1987. The purpose of the manual is to enable project staff to initiate studies to determine cost-effective training strategies in population growth control education.…

  11. Effect of landslides and debris flow deposits in gravity time series

    NASA Astrophysics Data System (ADS)

    Mouyen, M.; Masson, F.; Hwang, C.; Cheng, C.; Le Moigne, N.; Lee, J.; Kao, R.; Hsieh, W.

    2012-12-01

    From 2006 to 2010, yearly gravity times series surveys were conducted across southern Taiwan in order to monitor mass transfers and ground deformations in this active tectonics area. In Taiwan, the main reasons for gravity variations are the redistribution of local groundwater and vertical ground motions sustained by summer wet/winter dry conditions and tectonic forces, respectively. However, early August 2009, Morakot typhoon hit the island and triggered numerous landslides and debris lows. Every year' typhoons make landfall in Taiwan but Morakot was the strongest since 50 years. Large volumes of materials were removed from the central range slopes and were redistributed in the valleys. The amplitude of the gravity changes measured after Morakot, at sites located nearby landslides or deposits areas, cannot be explained by local water redistribution or vertical motions of the ground. Therefore, we suggested that large gravity changes correspond to the transfer of materials eroded by the typhoon. This hypothesis is also favoured by a correlation between the topography around the measurement site and the gravity variation; gravity decreased (i.e. loss of mass below the measurement site) in sloping areas and increased (gain of mass) in flat areas. Coupling gravity results, aerial images analysis and field obsevations we estimated the thickness of the debris flow deposits and landslides. Because this use of temporal gravimetry was unexpected, we propose some survey improvements in order to better quantify such mass transfers.

  12. Electronic instabilities and irradiation effects in the (TMTTF)2X series

    NASA Astrophysics Data System (ADS)

    Coulon, Claude; Foury-Leylekian, Pascale; Fabre, Jean-Marc; Pouget, Jean-Paul

    2015-04-01

    The paper presents a single-crystal ESR study of a series of pristine and X-ray irradiated (TMTTF)2X salts, where TMTTF is tetramethyltetrathiafulvalene and X is either a centro-symmetrical (SbF6 and Br) or a non-centro-symmetrical (ReO4, ClO4, BF4, SCN and NO3) monovalent anion. Besides standard line-width and spin-susceptibility measurements, the analysis of the asymmetry of the ESR line shape allows to obtain simultaneous information on the electrical conductivity. This whole set of data is used to determine the charge and spin gaps related to the charge ordering (CO) and anion ordering (AO) ground states and their evolution as a function of X-ray irradiation damages. We show in particular that the sensibility of (TMTTF)2X salts to irradiation depends upon the nature of the anion X and that the CO ground state is drastically affected by irradiation damages at the difference of the AO ground state. We also present evidence of a CO transition and of a decoupling between the AO transition and the opening of a spin gap in (TMTTF)2NO3.

  13. In-office bleaching effects on the pulp flow and tooth sensitivity - case series.

    PubMed

    Cartagena, Andrés Felipe; Parreiras, Sibelli Olivieri; Loguercio, Alessandro Dourado; Reis, Alessandra; Campanha, Nara Hellen

    2015-01-01

    Laser Doppler flowmetry (LDF) is a noninvasive method capable of evaluating variations in pulp blood flow (PBF) and pulp vitality. This method has thus far not been used to assess changes in blood flow after in-office bleaching. The aim of this case series report was to measure changes in PBF by LDF in the upper central incisor of three patients submitted to in-office bleaching. The buccal surfaces of the upper arch were bleached with a single session of 35% hydrogen peroxide gel with three 15-min applications. The color was recorded using a value-oriented Vita shade guide before in-office bleaching and one week after the procedure. The tooth sensitivity (TS) in a verbal scale was reported, and PBF was assessed by LDF before, immediately, and one week after the bleaching session. The lower arch was submitted to dental bleaching but not used for data assessment. A whitening degree of 3 to 4 shade guide units was detected. All participants experienced moderate to considerable TS after the procedure. The PBF readings reduced 20% to 40% immediately after bleaching. One week post-bleaching, TS and PBF were shown to be equal to baseline values. A reversible decrease of PBF was detected immediately after bleaching, which recovered to the baseline values or showed a slight increase sooner than one week post-bleaching. The LDF method allows detection of pulp blood changes in teeth submitted to in-office bleaching, but further studies are still required. PMID:25627891

  14. Is mindfulness-based therapy an effective intervention for obsessive-intrusive thoughts: a case series.

    PubMed

    Wilkinson-Tough, Megan; Bocci, Laura; Thorne, Kirsty; Herlihy, Jane

    2010-01-01

    Despite the efficacy of cognitive-behavioural interventions in improving the experience of obsessions and compulsions, some people do not benefit from this approach. The present research uses a case series design to establish whether mindfulness-based therapy could benefit those experiencing obsessive-intrusive thoughts by targeting thought-action fusion and thought suppression. Three participants received a relaxation control intervention followed by a six-session mindfulness-based intervention which emphasized daily practice. Following therapy all participants demonstrated reductions in Yale-Brown Obsessive-Compulsive Scale scores to below clinical levels, with two participants maintaining this at follow-up. Qualitative analysis of post-therapy feedback suggested that mindfulness skills such as observation, awareness and acceptance were seen as helpful in managing thought-action fusion and suppression. Despite being limited by small participant numbers, these results suggest that mindfulness may be beneficial to some people experiencing intrusive unwanted thoughts and that further research could establish the possible efficacy of this approach in larger samples. PMID:20041421

  15. The Positive and Negative Effects of Science Concept Tests on Student Conceptual Understanding

    Microsoft Academic Search

    James P. Barufaldi

    2010-01-01

    This study explored the phenomenon of testing effect during science concept assessments, including the mechanism behind it and its impact upon a learner's conceptual understanding. The participants consisted of 208 high school students, in either the 11th or 12th grade. Three types of tests (traditional multiple?choice test, correct concept test, and incorrect concept test) related to the greenhouse effect and

  16. The effect of opium addiction on thyroid function tests

    PubMed Central

    2014-01-01

    Background A number of abnormalities has been identified among drug addicted users especially heroin addicts. However, there are a few studies to assess the opium effects on thyroid hormones. the aim of the present study is to investigate the effect of opium on the thyroid function tests. Method In this case–control, 50 male addicts, aged 20–50 years, with history of addiction to opium lasting more than two years, and 50 male non-addicts as control group were randomly selected. 10 cc blood sample was taken for measurements of TSH, total T4 and T3, free T4 and T3, and T3 resin uptake (T3RU) and 50 cc urine sample for opium testing. Results The univariate analysis revealed that there was not a significant association between opium and serum levels of T4 and TSH, but compared with control group, a slight increase in total T3 and a decrease in T3RU were observed among addicts (P?effect on serum free T4 level after adjusting of age and cigarette smoking (P?

  17. Establishing and Explaining the Testing Effect in Free Recall for Young Children

    ERIC Educational Resources Information Center

    Lipowski, Stacy L.; Pyc, Mary A.; Dunlosky, John; Rawson, Katherine A.

    2014-01-01

    Research has consistently shown memory is enhanced when learning combines test trials with study trials compared with study trials alone (i.e., testing effect). However, the majority of work on testing effects has involved undergraduate students. In the current experiment, the authors examined testing effects in 2 groups of elementary school…

  18. A semi-field approach to testing effects of fresh pesticide residues on bees in multiple-rate test

    Microsoft Academic Search

    F. Bakker; J. N. M. Calis

    2003-01-01

    We describe a semi-field cage test specifically designed to test effects of delayed exposure to plant protection products. The trial involved the use of standardised mini-beehives. The principle of the trial was to prepare two groups of potted test plants per treatment. The first group of plants remained untreated, while the second group was treated at the desired rate and

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

    Microsoft Academic Search

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

    2007-01-01

    The purpose of this study was to evaluate the methodology of Margaria staircase test (MT) for assessment of muscle anaerobic\\u000a power. Specifically, we hypothesized that due to the scaling effects the outcome of MT calculated using the standard formula\\u000a 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\\/s2, h = height of stairs climbed,

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

    PubMed

    Zaitsu, Wataru

    2012-10-01

    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

  1. Antidiabetic effects of a series of vanadium dipicolinate complexes in rats with streptozotocin-induced diabetes

    Microsoft Academic Search

    Gail R. Willsky; Lai-Har Chi; Michael Godzala; Paul J. Kostyniak; Jason J. Smee; Alejandro M. Trujillo; Josephine A. Alfano; Wenjin Ding; Zihua Hu; Debbie C. Crans

    2011-01-01

    The effects of oral treatment of rats with streptozotocin-induced diabetes with a range of vanadium dipicolinate complexes (Vdipic) and derivatives are reviewed. Structure–reactivity relationships are explored aiming to correlate properties such as stability, to their insulin-enhancing effects. Three types of modifications are investigated; first, substitutions on the aromatic ring, second, coordination of a hydroxylamido group to the vanadium, and third,

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

    PubMed

    Mayser, Peter; Argembeaux, Horst; Rippke, Frank

    2003-01-01

    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

  3. Effect of P 2O 5 content in two series of soda lime phosphosilicate glasses on structure and properties – Part II: Physical properties

    Microsoft Academic Search

    M. D. O’Donnell; S. J. Watts; R. V. Law; R. G. Hill

    2008-01-01

    The effect of the variation in phosphate (P2O5) content on the properties of two series of bioactive glasses in the quaternary system SiO2–Na2O–CaO–P2O5 was studied. The first series (I) was a simple substitution of P2O5 for SiO2 keeping the Na2O:CaO ratio fixed (1:0.87). The second series (II) was designed to ensure charge neutrality in the orthophosphate (PO43-), therefore as P2O5

  4. Design, production, and testing of field effect transistors. [cryogenic MOSFETS

    NASA Technical Reports Server (NTRS)

    Sclar, N.

    1982-01-01

    Cryogenic MOSFETS (CRYOFETS), specifically designed for low temperature preamplifier application with infrared extrinsic detectors were produced and comparatively tested with p-channel MOSFETs under matched conditions. The CRYOFETs exhibit lower voltage thresholds, high source-follower gains at lower bias voltage, and lower dc offset source voltage. The noise of the CRYOFET is found to be 2 to 4 times greater than the MOSFET with a correspondingly lower figure of merit (which is established for source-follower amplifiers). The device power dissipation at a gain of 0.98 is some two orders of magnitude lower than for the MOSFET. Further, CRYOFETs are free of low temperature I vs V character hysteresis and balky conduction turn-on effects and operate effectively in the 2.4 to 20 K range. These devices have promise for use on long term duration sensor missions and for on-focal-plane signal processing at low temperatures.

  5. Effective and Efficient Test Architecture Design for SOCs

    Microsoft Academic Search

    Sandeep Kumar Goel; Erik Jan Marinissen

    2002-01-01

    This paper deals with the design of test architectures for modular SOC testing. These architectures consist of wrappers and TAMs (test access mechanisms). For a given SOC, with specified parameters of modules and their tests, we design architectures which minimize the required ATE vector memory depth and test application time. In this paper, we formulate the problems of test architecture

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

    SciTech Connect

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

    1995-06-01

    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.

  7. The Combined Release and Radiation Effects Satellite (CRRES) program: A unique series of scientific experiments

    NASA Technical Reports Server (NTRS)

    Reasoner, David L.; Mccook, Morgan W. (editor); Vaughan, William W. (editor)

    1990-01-01

    The Defense Department and NASA have joined in a program to study the space environment which surrounds the earth and the effects of space radiation on modern satellite electronic systems. The Combined Release and Radiation Effects Satellite (CRRES) will carry an array of active experiments including chemical releases and a complement of sophisticated scientific instruments to accomplish these objectives. Other chemical release active experiments will be performed with sub-orbital rocket probes. The chemical releases will 'paint' the magnetic and electric fields of earthspace with clouds of glowing ions. Earthspace will be a laboratory, and the releases will be studied with an extensive network of ground-, aircraft-, and satellite-based diagnostic instruments. Some of the topics discussed include the following: the effects of earthspace; the need for active experiments; types of chemical releases; the CRRES program schedule; international support and coordinated studies; photographing chemical releases; information on locating chemical releases for observation by the amateur; and CRRES as a program.

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

    E-print Network

    by means of NMR spectroscopy and molecular dynamics simulations that the traditional explan- ation upon uncapping the N- terminus. Weakly hydrated anions, such as iodide and thiocyanate, interact role in ion-specific effects. The present study thus provides a molecular rationalization of Hofmeister

  9. Monitoring web traffic source effectiveness with Google Analytics : An experiment with time series

    Microsoft Academic Search

    Beatriz Plaza

    2009-01-01

    Purpose – The aim of this paper is to develop a new user-friendly in-house tracking methodology for academics to analyse the effectiveness of visits (return visit behaviour and length of sessions) depending on their traffic source: direct visits, referring site entries and search engine visits. In other words, how deep do visitors navigate into the web site? Which is their

  10. Supervision: Exploring the Effective Components. ERIC/CASS Counseling Digest Series.

    ERIC Educational Resources Information Center

    Borders, L. DiAnne, Ed.

    This document contains a collection of ERIC Digests on supervision, a topic of critical professional importance for counselors. Following an introductory article by the guest editor, L. DiAnne Borders, "Supervision: Exploring the Effective Components," 19 digests address a different facet of supervision. The 19 digests are: (1) "Models of Clinical…

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

    ERIC Educational Resources Information Center

    Anderson, Charles W.; And Others

    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…

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

    ERIC Educational Resources Information Center

    Ettinger, Blanche; Perfetto, Edda

    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,…

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

    ERIC Educational Resources Information Center

    O'Neill, Gertrudis, Comp.

    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…

  14. Analyzing Group Level Effects with Clustered Data Using Taylor Series Linearization

    ERIC Educational Resources Information Center

    Huang, Francis L.

    2014-01-01

    Clustered data (e.g., students within schools) are often analyzed in educational research where data are naturally nested. As a consequence, multilevel modeling (MLM) has commonly been used to study the contextual or group-level (e.g., school) effects on individual outcomes. The current study investigates the use of an alternative procedure to…

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

    E-print Network

    Champagne, Frances A.

    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. Ó

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

    NASA Astrophysics Data System (ADS)

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

    2011-12-01

    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.

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

    NASA Astrophysics Data System (ADS)

    Yi, Wen; Chan, Albert P. C.

    2015-07-01

    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.

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

    PubMed

    Yi, Wen; Chan, Albert P C

    2015-07-01

    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

  19. Testing.

    ERIC Educational Resources Information Center

    Killoran, James, Ed.

    1984-01-01

    This journal issue addresses the issue of testing in the social studies classroom. The first article, "The Role of Testing" (Bragaw), focuses on the need for tests to reflect the objectives of the study completed. The varying functions of pop quizzes, weekly tests, and unit tests are explored. "Testing Thinking Processes" (Killoran, Zimmer, and…

  20. Effect of structurally constrained oxime–ether linker on PPAR subtype selectivity: Discovery of a novel and potent series of PPAR-pan agonists

    Microsoft Academic Search

    Pankaj Makadia; Shailesh R. Shah; Harikishore Pingali; Pandurang Zaware; Darshit Patel; Suresh Pola; Baban Thube; Priyanka Priyadarshini; Dinesh Suthar; Maanan Shah; Suresh Giri; Chitrang Trivedi; Mukul Jain; Pankaj Patel; Rajesh Bahekar

    2011-01-01

    A novel series of thaizole and oxazole containing phenoxy acetic acid derivatives is reported as PPAR-pan agonists. Incorporation of structurally constrained oxime–ether based linker in the chemotype of a potent PPAR? selective agonist GW-501516 was adapted as designing strategy. In vitro, selected test compounds 12a, 12c, 17a and 18a showed PPAR-pan agonists activities and among these four compounds tested, 12a

  1. Single-Event Effect Report for EPC Series eGaN FETs: The Effect of Load Conditions on Destructive SEE

    NASA Technical Reports Server (NTRS)

    Scheick, Leif

    2014-01-01

    Recent testing of Enhanced Power Conversion (EPC) eGaN FET devices design for power use has shown that the devices are susceptible to Single-Event Effects (SEE) that degrade or destroy the device. The exact mechanism of the SEE is not known. The testing so far has been in the static condition, in the fully off condition, and with minimal load conditions. These conditions may not be worst case. This report presents the results of a study that tests some of the load conditions for SEE. The EPC2012 and EPC1012 were chosen for the test. The tests were performed the TAMU radiation effects facility in May and June of 2013.

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

    E-print Network

    2012-01-01

    for why they were deaf; thus, pre-test genetic counselingdeaf individuals’ prior beliefs during pre-test geneticdeaf individuals’ genetics knowledge and understanding following receipt of genetic test

  3. The effect of plastic deformation on structure and properties of chosen 6000 series aluminium alloys

    Microsoft Academic Search

    J. Dutkiewicz; L. Litynska

    2002-01-01

    In order to determine the effect of increased copper addition on the strengthening behaviour during deformation and subsequent ageing, two types of Al alloys were continuously cast and extruded: 6013 containing 1.15% Mg, 1.08% Si, 0.7% Mn, 0.3% Fe and 1.1% Cu, and 6XXX alloy containing 1.09% Mg, 0.9% Si, 0.1% Fe and 1.6%Cu (in wt.%). The 6XXX alloy aged

  4. 49 CFR 40.273 - What is the effect of a cancelled alcohol test?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 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...

  5. 49 CFR 40.273 - What is the effect of a cancelled alcohol test?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 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...

  6. 49 CFR 40.273 - What is the effect of a cancelled alcohol test?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 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...

  7. Quantification of the acute effect of a low dose of red wine by nonlinear measures of RR and QT interval series in healthy subjects.

    PubMed

    Platiša, Mirjana M; Gal, Vera; Nestorovi?, Zorica; Gojkovi?-Bukarica, Ljiljana

    2014-10-01

    The measures of nonlinear properties of RR interval and QT interval time series are sensitive to physiologically- or pathologically-induced complexity/regularity changes, but were not used to estimate the effect of alcohol intake. We wanted to examine the potential of these measures to quantify the acute effect of a low dose of red wine in healthy subjects. In separate experiments, fourteen young volunteers drank 200ml of red wine and a control drink with equal concentration of ethanol. ECG in supine position was recorded 20min before and 60min after drink intake. RR interval and QT interval series were extracted from ECG and we calculated variability, scaling exponents (?1 and ?2) and sample entropy (SampEn) for both series. Systolic and diastolic blood pressures (BP) were measured every 10min. The immediate effect of both the drinks was equal: HR, BP and QT variability exhibited a sudden increase and then a decrease. However, the prolonged effect of wine and the control drink was different. Wine decreased both BP (p<0.05) and reduced complexity of RR and QT series (increased scaling exponents and decreased SampEn). The control drink prolonged QT and RR intervals (p<0.05). These results point out that the nonlinear properties of RR and QT interval series could be used to differentiate the effect of wine and ethanol. Changes in RR and QT interval series induced by a low dose of red wine are more detectable by methods that quantify the structure of the series than by methods that quantify their variability. PMID:25194258

  8. Strategies for testing the irritation-signaling model for chronic lung effects of fine acid particles

    SciTech Connect

    Hattis, D.; Abdollahzadeh, S.; Franklin, C.A. (Massachusetts Institute of Technology, Cambridge (USA))

    1990-03-01

    The irritation signaling model proposed that a long term contribution to chronic bronchitis might result from the repeated delivery of signals resulting from temporary localized acidification of the bronchial epithelium by the action of individual particles. This led to a prediction that the effectiveness of particles in inducing changes in mucus secreting cell numbers/types should depend on the number of particles deposited that contained a particular amount of acid--implying that particles below a certain size cutoff (and therefore lacking a minimum amount of acid) should be ineffective; and that particle potency per unit weight should be greatest at the cutoff and decline strongly above the cutoff. Since the development of this hypothesis both epidemiological observations and some experimental studies have tended to reinforce the notion that acid particles can make a contribution to relatively long lasting bronchitic-like changes, and enhance the desirability of more direct testing of the model. In this paper we develop a general theoretical framework for the contributions of environmental agents to chronic obstructive lung disease, and a series of alternative hypotheses against which the predictions of the irritant signaling model can be compared. Based on this, we suggest a research program that could be used to further develop and test the model and reasonable alternatives. 82 references.

  9. 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.

  10. The Combined Release and Radiation Effects Satellite program (CRRES): A unique series of scientific experiments

    NASA Technical Reports Server (NTRS)

    1991-01-01

    CRRES is a program to study the space environment which surrounds Earth and the effects of space radiation on modern satellite electronic systems. The satellite will carry an array of active experiments including chemical releases and a complement of sophisticated scientific instruments to accomplish these objectives. Other chemical release active experiments will be performed with suborbital rocket probes. These chemical releases will paint the magnetic and electric fields in Earthspace with clouds of glowing ions. Earthspace will be a laboratory, and the releases will be studied with an extensive network of ground-, aircraft-, and satellite-based diagnostic instruments.

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

    PubMed

    Tayob, Nabihah; Murray, Susan

    2015-01-01

    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 ? -restricted outcomes from prespecified intervals starting at times t(k), k = 1, . . . , b, and compares estimated ? -restricted mean survival across treatment groups from this combined dataset. The second procedure calculates conditional ?-restricted means from those at risk at times t(k), k = 1, . . . , b, 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

  12. Tests of a Functional Account of the Abney Effect

    PubMed Central

    O’Neil, Sean F.; McDermott, Kyle C.; Mizokami, Yoko; Werner, John S.; Crognale, Michael A.; Webster, Michael A.

    2011-01-01

    The Abney effect refers to changes in the hue of lights as they are desaturated. Normally the purity is varied by desaturating with a fixed spectrum. Mizokami et al. (2006, Journal of Vision, 6(9), 996–1007) instead varied purity by using Gaussian spectra and increasing their bandwidth. Under these conditions the hues of lights at short and medium wavelengths tended to remain constant and thus were tied to a fixed property of the stimulus like the spectral peak, possibly reflecting a compensation for the spectral filtering effects of the eye. Here we test this account more completely by comparing constant hue loci across a wide range of wavelengths and between the fovea and periphery. Purity was varied by adding either a fixed spectrum or by varying the spectral bandwidth, using an Agile Light Source capable of generating arbitrary spectra. For both types of spectra, hue loci were approximated by the Gaussian model at short and medium wavelengths, though the model failed to predict the precise form of the hue changes or the differences between the fovea and periphery. Our results suggest that a Gaussian model provides a useful heuristic for predicting constant hue loci and the form of the Abney effect at short and medium wavelengths, and may approximate the inferences underlying the representation of hue in the visual system. PMID:22330374

  13. Modeling the DEM Error effects in InSAR time-series results; with application to inter-seismic ground deformation estimation along the Chaman Fault

    NASA Astrophysics Data System (ADS)

    Fattahi, H.; Amelung, F.

    2011-12-01

    Temporal surface deformation, estimated from InSAR time-series techniques, is affected by various sources of errors, including topographic artifacts, atmospheric delay, orbital errors and noise. Topographic artifacts are the results of the inaccuracy of the DEMs, which are used to remove the topographic signal from the differential interferograms. While the DEM error effect in each interferogram is proportional to it's perpendicular baseline, but this effect was not well known and modeled in InSAR time-series results. We present a mathematical model for the DEM error effects in the estimated phase history, resulted from SBAS time-series inversion of interferometric phases. This model enables us to recognize the DEM error effects in the estimated temporal displacement signal. Using this model, we clarify that while selecting small spatial baseline interferograms minimizes the DEM error effect in the individual interferograms, but it cannot necessarily reduce this effect in the time-series results. We show the results of verification of the proposed model using simulated and real InSAR data sets. Based on this model we present our proposed new algorithm to correct the DEM error effects in InSAR time-series inversion results, as a post-processing method, which is independent of any preliminary assumption about the temporal deformation signal. We discuss the efficiency of the proposed method using the simulated and real data sets. We have used this post processing time-series technique to estimate the inter-seismic ground deformation along the Chaman fault. This fault is the transform boundary of Indian and Eurasian plates; located at the border of Afghanistan and Pakistan. Lack of geodetic data in this seismogenic area has been the main obstacle for accurate strain rate estimation. Here we present our results and interpretations of processing Envisat-ASAR acquisitions from different ascending and descending tracks covering the most parts of the fault from 2004 to 2010, which reveals creeping along some segments of the fault.

  14. Testing the effectiveness of icons for supporting distributed team decision making under time pressure

    Microsoft Academic Search

    Leonard Adelman; Sheryl L. Miller; Cedric Yeo

    2004-01-01

    There has been minimal experimentation testing the effectiveness of icons (or interface features in general) on distributed team decision making. To overcome this deficiency, an experiment tested the effectiveness of a \\

  15. Results of PRIM gyroscope testing: Conclusions regarding PRIM effects, supplement 1

    NASA Astrophysics Data System (ADS)

    Cornell, R. H.

    1985-03-01

    The effects of a Partially Restrained Internal Member in the XM785 projectile were determined. Small effects were observed during the small PRIM gyroscopic tests and of flight disturbances that are absent during the JB' tests.

  16. Assessing the psychological effects of prenatal screening tests for maternal and foetal conditions: a systematic review

    Microsoft Academic Search

    James Matthew Harris; Linda Franck; Susan Michie

    2012-01-01

    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

  17. High Element Interactivity Information during Problem Solving May Lead to Failure to Obtain the Testing Effect

    ERIC Educational Resources Information Center

    Leahy, Wayne; Hanham, José; Sweller, John

    2015-01-01

    The testing effect occurs when learners who are tested rather than relearning material perform better on a final test than those who relearn. Based on cognitive load theory, it was predicted that the testing effect may not be obtained when the material being learned is high in element interactivity. Three experiments investigated conditions of the…

  18. Test of fundamental symmetries via the Primakoff effect

    SciTech Connect

    Gan, Liping [University of North Carolina at Wilmington

    2014-06-01

    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.

  19. Effect of Power Bleaching on the Fluorosis Stained Anterior Teeth Case Series

    PubMed Central

    M, Annapoorna B; Tejaswi, Sunil; Shetty, Suneeth; K, Sowmya H

    2014-01-01

    Bleaching is a conservative method for restoring the colour of intrinsic discoloration of teeth. The combination of McInnes solution and power bleaching is effective procedure for bleaching of fluorosis stained teeth. Definitely bleaching with McInnes bleaching agent gives instant results, not dependent on patient’s compliance as other office based procedures, no dehydration of the tooth occurs with no damage to the pulp. Bleaching with this solution is esthetically pleasing and minimally invasive option for young patients rather than a complete coronal covering. The dentist is in complete control of the process throughout the treatment. It is a fast process the results are evident even after a single visit. PMID:25302292

  20. SERI Wind Energy Program

    SciTech Connect

    Noun, R. J.

    1983-06-01

    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.