WorldWideScience

Sample records for complex performance assessment

  1. Radioactive Waste Management Complex performance assessment: Draft

    Energy Technology Data Exchange (ETDEWEB)

    Case, M.J.; Maheras, S.J.; McKenzie-Carter, M.A.; Sussman, M.E.; Voilleque, P.

    1990-06-01

    A radiological performance assessment of the Radioactive Waste Management Complex at the Idaho National Engineering Laboratory was conducted to demonstrate compliance with appropriate radiological criteria of the US Department of Energy and the US Environmental Protection Agency for protection of the general public. The calculations involved modeling the transport of radionuclides from buried waste, to surface soil and subsurface media, and eventually to members of the general public via air, ground water, and food chain pathways. Projections of doses were made for both offsite receptors and individuals intruding onto the site after closure. In addition, uncertainty analyses were performed. Results of calculations made using nominal data indicate that the radiological doses will be below appropriate radiological criteria throughout operations and after closure of the facility. Recommendations were made for future performance assessment calculations.

  2. Performance assessment in complex individual and team tasks

    Science.gov (United States)

    Eddy, Douglas R.

    1992-01-01

    Described here is an eclectic, performance based approach to assessing cognitive performance from multiple perspectives. The experience gained from assessing the effects of antihistamines and scenario difficulty on C (exp 2) decision making performance in Airborne Warning and Control Systems (AWACS) weapons director (WD) teams can serve as a model for realistic simulations in space operations. Emphasis is placed on the flexibility of measurement, hierarchical organization of measurement levels, data collection from multiple perspectives, and the difficulty of managing large amounts of data.

  3. IMPROVING CONSISTENCY OF PERFORMANCE ASSESSMENTS IN THE DOE COMPLEX

    Energy Technology Data Exchange (ETDEWEB)

    Seitz, R; Elmer Wilhite, E

    2009-01-20

    The low-level waste (LLW) performance assessment (PA) process has been traditionally focused on disposal facilities at a few United States Department of Energy (USDOE) sites and commercial disposal facilities. In recent years, there has been a dramatic increase in the scope of the use of PA-like modeling approaches, involving multiple activities, facilities, contractors and regulators. The scope now includes, for example: (1) National Environmental Policy Act (NEPA) assessments, (2) CERCLA disposal cells, (3) Waste Determinations and High-Level Waste (HLW) Closure activities, (4) Potential on-site disposal of Transuranic (TRU) waste, and (5) In-situ decommissioning (including potential use of existing facilities for disposal). The dramatic increase in the variety of activities requiring more detailed modeling has resulted in a similar increase in the potential for inconsistency in approaches both at a site and complexwide scale. This paper includes a summary of USDOE Environmental Management (EM) sponsored initiatives and activities for improved consistency. New initiatives entitled the Performance Assessment Community of Practice and Performance Assessment Assistance Team are also introduced.

  4. Radioactive Waste Management Complex low-level waste radiological performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Maheras, S.J.; Rood, A.S.; Magnuson, S.O.; Sussman, M.E.; Bhatt, R.N.

    1994-04-01

    This report documents the projected radiological dose impacts associated with the disposal of radioactive low-level waste at the Radioactive Waste Management Complex at the Idaho National Engineering Laboratory. This radiological performance assessment was conducted to evaluate compliance with applicable radiological criteria of the US Department of Energy and the US Environmental Protection Agency for protection of the public and the environment. The calculations involved modeling the transport of radionuclides from buried waste, to surface soil and subsurface media, and eventually to members of the public via air, groundwater, and food chain pathways. Projections of doses were made for both offsite receptors and individuals inadvertently intruding onto the site after closure. In addition, uncertainty and sensitivity analyses were performed. The results of the analyses indicate compliance with established radiological criteria and provide reasonable assurance that public health and safety will be protected.

  5. Assessing Dimensionality in Complex Data Structures: A Performance Comparison of DETECT and NOHARM Procedures

    Science.gov (United States)

    Svetina, Dubravka

    2011-01-01

    The purpose of this study was to investigate the effect of complex structure on dimensionality assessment in compensatory and noncompensatory multidimensional item response models (MIRT) of assessment data using dimensionality assessment procedures based on conditional covariances (i.e., DETECT) and a factor analytical approach (i.e., NOHARM). …

  6. Fuzzy-logic-based network for complex systems risk assessment: application to ship performance analysis.

    Science.gov (United States)

    Abou, Seraphin C

    2012-03-01

    In this paper, a new interpretation of intuitionistic fuzzy sets in the advanced framework of the Dempster-Shafer theory of evidence is extended to monitor safety-critical systems' performance. Not only is the proposed approach more effective, but it also takes into account the fuzzy rules that deal with imperfect knowledge/information and, therefore, is different from the classical Takagi-Sugeno fuzzy system, which assumes that the rule (the knowledge) is perfect. We provide an analytical solution to the practical and important problem of the conceptual probabilistic approach for formal ship safety assessment using the fuzzy set theory that involves uncertainties associated with the reliability input data. Thus, the overall safety of the ship engine is investigated as an object of risk analysis using the fuzzy mapping structure, which considers uncertainty and partial truth in the input-output mapping. The proposed method integrates direct evidence of the frame of discernment and is demonstrated through references to examples where fuzzy set models are informative. These simple applications illustrate how to assess the conflict of sensor information fusion for a sufficient cooling power system of vessels under extreme operation conditions. It was found that propulsion engine safety systems are not only a function of many environmental and operation profiles but are also dynamic and complex.

  7. Reduced-complexity modeling of braided rivers: Assessing model performance by sensitivity analysis, calibration, and validation

    Science.gov (United States)

    Ziliani, L.; Surian, N.; Coulthard, T. J.; Tarantola, S.

    2013-12-01

    paper addresses an important question of modeling stream dynamics: How may numerical models of braided stream morphodynamics be rigorously and objectively evaluated against a real case study? Using simulations from the Cellular Automaton Evolutionary Slope and River (CAESAR) reduced-complexity model (RCM) of a 33 km reach of a large gravel bed river (the Tagliamento River, Italy), this paper aims to (i) identify a sound strategy for calibration and validation of RCMs, (ii) investigate the effectiveness of multiperformance model assessments, (iii) assess the potential of using CAESAR at mesospatial and mesotemporal scales. The approach used has three main steps: first sensitivity analysis (using a screening method and a variance-based method), then calibration, and finally validation. This approach allowed us to analyze 12 input factors initially and then to focus calibration only on the factors identified as most important. Sensitivity analysis and calibration were performed on a 7.5 km subreach, using a hydrological time series of 20 months, while validation on the whole 33 km study reach over a period of 8 years (2001-2009). CAESAR was able to reproduce the macromorphological changes of the study reach and gave good results as for annual bed load sediment estimates which turned out to be consistent with measurements in other large gravel bed rivers but showed a poorer performance in reproducing the characteristics of the braided channel (e.g., braiding intensity). The approach developed in this study can be effectively applied in other similar RCM contexts, allowing the use of RCMs not only in an explorative manner but also in obtaining quantitative results and scenarios.

  8. The Relationship between Students' Performance on Conventional Standardized Mathematics Assessments and Complex Mathematical Modeling Problems

    Science.gov (United States)

    Kartal, Ozgul; Dunya, Beyza Aksu; Diefes-Dux, Heidi A.; Zawojewski, Judith S.

    2016-01-01

    Critical to many science, technology, engineering, and mathematics (STEM) career paths is mathematical modeling--specifically, the creation and adaptation of mathematical models to solve problems in complex settings. Conventional standardized measures of mathematics achievement are not structured to directly assess this type of mathematical…

  9. Development and Alternate Form Reliability of the Complex Task Performance Assessment (CTPA) for People With Mild Stroke.

    Science.gov (United States)

    Saa, Juan Pablo; Doherty, Meghan; Young, Alexis; Spiers, Meredith; Leary, Emily; Wolf, Timothy J

    Cognitive impairment is a common consequence of mild stroke. Current performance-based assessments for mild stroke can detect mild impairments in executive function but lack alternate forms to be used as outcome measures. This study aimed to develop an alternate form of the Complex Task Performance Assessment (CTPA-Alt), a performance-based assessment of executive function, and to establish the alternate form reliability of the CTPA-Alt. A repeated-measures study was conducted with 26 community participants. Participants were screened for eligibility and administered both forms of the CTPA; administration order was alternated. Overall performance was significantly correlated (rs = .44, p = .03), but pattern of scoring differed by CTPA form and order of administration. Our results indicate that the CTPA forms were similar but that the specific tasks in each form were different. The CTPA may be used as an ecologically valid outcome assessment with further considerations. Copyright © 2017 by the American Occupational Therapy Association, Inc.

  10. Complexity, Robustness, and Performance

    NARCIS (Netherlands)

    B. Visser (Bauke)

    2002-01-01

    textabstractThis paper analyses the relationship between organizational complexity ( the degree of detail of information necessary to correctly assign agents to positions), robustness (the relative loss of performance due to mis-allocated agents), and performance. More complex structures are not

  11. Complexity, Robustness, and Performance

    NARCIS (Netherlands)

    B. Visser (Bauke)

    2002-01-01

    textabstractThis paper analyses the relationship between organizational complexity ( the degree of detail of information necessary to correctly assign agents to positions), robustness (the relative loss of performance due to mis-allocated agents), and performance. More complex structures are not nec

  12. Analysis of the low-level waste radionuclide inventory for the Radioactive Waste Management Complex performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Plansky, L.E.; Hoiland, S.A.

    1992-02-01

    This report summarizes the results of a study to improve the estimates of the radionuclides in the low-level radioactive waste (LLW) inventory which is buried in the Idaho National Engineering Laboratory (INEL) Radioactive Waste Management Complex (RWMC) Subsurface Disposal Area (SDA). The work is done to support the RWMC draft performance assessment (PA). Improved radionuclide inventory estimates are provided for the INEL LLW generators. Engineering, environmental assessment or other research areas may find use for the information in this report. It may also serve as a LLW inventory baseline for data quality assurance. The individual INEL LLW generators, their history and their activities are also described in detail.

  13. A Performance Assessment of an Airborne Separation Assistance System Using Realistic Complex Traffic Flows

    Science.gov (United States)

    Smith, Jeremy C.; Bussink, Frank J. L.

    2008-01-01

    This paper presents the results from a study that investigates the performance of a tactical Airborne Separation Assistance System (ASAS) in en route airspace, under varying demand levels, with realistic traffic flows. The ASAS concept studied here allows flight crews of equipped aircraft to perform separation from other air traffic autonomously. This study addresses the tactical aspects of an ASAS using aircraft state data (i.e. position and velocity) to detect and resolve projected conflicts. In addition, use of a conflict prevention system helps ASAS-equipped aircraft avoid maneuvers that may cause new conflicts. ASAS-capable aircraft are equipped with satellite-based navigation and Automatic Dependent Surveillance Broadcast (ADS-B) for transmission and receipt of aircraft state data. In addition to tactical conflict detection and resolution (CD&R), a complete, integrated ASAS is likely to incorporate a strategic CD&R component with a longer look-ahead time, using trajectory intent information. A system-wide traffic flow management (TFM) component, located at the FAA command center helps aircraft to avoid regions of excessive traffic density and complexity. A Traffic Alert and Collision Avoidance System (TCAS), as used today is the system of last resort. This integrated approach avoids sole reliance on the use of the tactical CD&R studied here, but the tactical component remains a critical element of the complete ASAS. The focus of this paper is to determine to what extent the proposed tactical component of ASAS alone can maintain aircraft separation at demand levels up to three times that of current traffic. The study also investigates the effect of mixing ASAS-equipped aircraft with unequipped aircraft (i.e. current day) that do not have the capability to self-separate. Position and velocity data for unequipped aircraft needs to be available to ASASequipped. Most likely, for this future concept, state data would be available from instrument flight rules (IFR

  14. Simple versus complex assessment of white matter hyperintensities in relation to physical performance and cognition: the LADIS study.

    Science.gov (United States)

    Gouw, A A; Van der Flier, W M; van Straaten, E C W; Barkhof, F; Ferro, J M; Baezner, H; Pantoni, L; Inzitari, D; Erkinjuntti, T; Wahlund, L O; Waldemar, G; Schmidt, R; Fazekas, F; Scheltens, Ph

    2006-09-01

    White matter hyperintensities (WMH) on MRI are associated with disorders of gait and balance and with cognitive impairment. The most suitable method to assess WMH in relation to the clinical evaluation of disturbances in these areas has not yet been established. To compare a simple visual rating scale, a detailed visual rating scale and volumetric assessment of WMH with respect to their associations with clinical measures of physical performance and cognition. Data were drawn from the multicentre, multinational LADIS study. Data of 574 subjects were available. MRI analysis included assessment of WMH using the simple Fazekas scale, the more complex Scheltens scale and a semi-automated volumetric method. Disturbances of gait and balance and general cognitive function were assessed using the Short Physical Performance Battery (SPPB) and the Mini Mental State Examination (MMSE), respectively. Irrespective of the method of measuring WMH, subjects with disturbances of gait and balance (SPPB physical performance. Subjects with mild cognitive deficits (MMSE physical performance and cognition. This suggests that a simple visual rating scale may be sufficient, when analyzing relationships between clinical parameters and WMH in a clinical setting.

  15. An Exploratory Investigation of Various Assessment Instruments as Correlates of Complex Visual Monitoring Performance,

    Science.gov (United States)

    1980-10-01

    Inventory (15) and an intelligence test, the Wonderlic Personnel Test (36), to subjects who subsequently performed a simple visual monitoring task...1962. 36. Wonderlic , E. F.: Wonderlic Personnel Test. Glencoe, Illinois: Author, 1922. 37. Zuckerman, M.: Manual and Research Report for the Sensation Seeking Scale (SSS). Newark, New Jersey: University of Delaware, 1972. 17 IATE

  16. A Performance Assessment of a Tactical Airborne Separation Assistance System using Realistic, Complex Traffic Flows

    Science.gov (United States)

    Smith, Jeremy C.; Neitzke, Kurt W.; Bussink, Frank J. L.

    2008-01-01

    This paper presents the results from a study that investigates the performance of aspects of an Airborne Separation Assistance System (ASAS) under varying demand levels using realistic traffic patterns. This study only addresses the tactical aspects of an ASAS using aircraft state data (latitude, longitude, altitude, heading and speed) to detect and resolve projected conflicts. The main focus of this paper is to determine the extent to which sole reliance on the proposed tactical ASAS can maintain aircraft separation at demand levels up to three times current traffic. The effect of mixing ASAS equipped aircraft with non-equipped aircraft that do not have the capability to self-separate is also investigated.

  17. An adaptable mesocosm platform for performing integrated assessments of nanomaterial risk in complex environmental systems

    Science.gov (United States)

    Auffan, Mélanie; Tella, Marie; Santaella, Catherine; Brousset, Lenka; Paillès, Christine; Barakat, Mohamed; Espinasse, Benjamin; Artells, Ester; Issartel, Julien; Masion, Armand; Rose, Jérôme; Wiesner, Mark R.; Achouak, Wafa; Thiéry, Alain; Bottero, Jean-Yves

    2014-07-01

    Physical-chemists, (micro)biologists, and ecologists need to conduct meaningful experiments to study the environmental risk of engineered nanomaterials with access to relevant mechanistic data across several spatial and temporal scales. Indoor aquatic mesocosms (60L) that can be tailored to virtually mimic any ecosystem appear as a particularly well-suited device. Here, this concept is illustrated by a pilot study aimed at assessing the distribution of a CeO2-based nanomaterial within our system at low concentration (1.5 mg/L). Physico-chemical as well as microbiological parameters took two weeks to equilibrate. These parameters were found to be reproducible across the 9-mesocosm setup over a 45-day period of time. Recovery mass balances of 115 +/- 18% and 60 +/- 30% of the Ce were obtained for the pulse dosing and the chronic dosing, respectively. This demonstrated the relevance of our experimental approach that allows for adequately monitoring the fate and impact of a given nanomaterial.

  18. Student Performance along Axes of Scenario Novelty and Complexity in Introductory Biology: Lessons from a Unique Factorial Approach to Assessment

    Science.gov (United States)

    Deane-Coe, Kirsten K.; Sarvary, Mark A.; Owens, Thomas G.

    2017-01-01

    In an undergraduate introductory biology laboratory course, we used a summative assessment to directly test the learning objective that students will be able to apply course material to increasingly novel and complex situations. Using a factorial framework, we developed multiple true-false questions to fall along axes of novelty and complexity,…

  19. Procuring complex performance

    DEFF Research Database (Denmark)

    Hartmann, A.; Roehrich, J.; Frederiksen, Lars

    2014-01-01

    Purpose – The paper analyses how public buyers transition from procuring single products and services to procuring complex performance (PCP). The aim is to examine the change in the interactions between buyer and supplier, the emergence of value co-creation and the capability development during...... the transition process. Design/methodology/approach – A multiple, longitudinal case study method is used to examine the transition towards PCP. The study deploys rich qualitative data sets by combining semi-structured interviews, focus group meetings and organisational reports and documents. Findings...... – The transition towards PCP can be best described as a learning process which cumulates the knowledge and experience in the client-supplier interaction accompanied by changing contractual and relational capabilities. In public infrastructure this process is not initially motivated by the benefits of value co...

  20. Energy performance assessment methodology

    Energy Technology Data Exchange (ETDEWEB)

    Platzer, W.J. [Fraunhofer Inst. for Solar Energy Systems, Freiburg (Germany)

    2006-01-15

    The energy performance of buildings are intimately connected to the energy performance of building envelopes. The better we understand the relation between the quality of the envelope and the energy consumption of the building, the better we can improve both. We have to consider not only heating but all service energies related to the human comfort in the building, such as cooling, ventilation, lighting as well. The complexity coming from this embracing approach is not to be underestimated. It is less and less possible to realted simple characteristic performance indicators of building envelopes (such as the U-value) to the overall energy performance. On the one hand much more paramters (e.g. light transmittance) come into the picture we have to assess the product quality in a multidimensional world. Secondly buildings more and more have to work on a narrow optimum: For an old, badly insulated building all solar gains are useful for a high-performance building with very good insulation and heat recovery systems in the ventilation overheating becomes more likely. Thus we have to control the solar gains, and sometimes we need high gains, sometimes low ones. And thirdly we see that the technology within the building and the user patterns and interactions as well influence the performance of a building envelope. The aim of this project within IEA Task27 was to improve our knowledge on the complex situation and also to give a principal approach how to assess the performance of the building envelope. The participants have contributed to this aim not pretending that we have reached the end. (au)

  1. Complex performance in construction

    DEFF Research Database (Denmark)

    Bougrain, Frédéric; Forman, Marianne; Gottlieb, Stefan Christoffer

    To fulfil the expectations of demanding clients, new project-delivery mechanisms have been developed. Approaches focusing on performance-based building or new procurement processers such as new forms of private-public partnerships are considered as solutions improving the overall performance of t...... (Centre Scientifique et Technique du Bâtiment) and SBi/AAU (the Danish Building Research Institute/Aalborg University)....

  2. Assessment and Transfer: Unexamined Complexities.

    Science.gov (United States)

    Mittler, Mary L.; Bers, Trudy H.

    1994-01-01

    Examines the complexities, costs, and questions in planning and implementing feasible, reasoned assessment created by the dual phenomena of assessment and student mobility. Highlights institutional responsibility, student competence, timeliness, multiple and redundant assessment requirements, and lack of interinstitutional collaboration as issues…

  3. Distilling Complex Model Results into Simple Models for use in Assessing Compliance with Performance Standards for Low Level Waste Disposal Facilities

    Energy Technology Data Exchange (ETDEWEB)

    Arthur S. Rood

    2007-02-01

    Assessing the long term performance of waste disposal facility requires numerical simulation of saturated and unsaturated groundwater flow and contaminant transport. Complex numerical models have been developed to try to realistically simulate subsurface flow and transport processes. These models provide important information about system behavior and identify important processes, but may not be practical for demonstrating compliance with performance standards because of excessively long computer simulation times and input requirements. Two approaches to distilling the behavior of a complex model into simpler formulations that are practical for demonstrating compliance with performance objectives are examined in this paper. The first approach uses the information obtained from the complex model to develop a simple model that mimics the complex model behavior for stated performance objectives. The simple model may need to include essential processes that are important to assessing performance, such as time-variable infiltration and waste emplacement rates, subsurface heterogeneity, sorption, decay, and radioactive ingrowth. The approach was applied to a Low-Level Waste disposal site at the Idaho National Laboratory where a complex three dimensional vadose zone model was developed first to understand system behavior and important processes. The complex model was distilled down to a relatively simple one-dimensional vadose zone model and three-dimensional aquifer transport model. Comparisons between the simple model and complex model of vadose zone fluxes and groundwater concentrations showed relatively good agreement between the models for both fission and activation products (129I, 36Cl, 99Tc) and actinides (238U, 239Pu, 237Np). Application of the simple model allowed for Monte Carlo uncertainty analysis and simulations of numerous disposal and release scenarios. The second approach investigated was the response surface model. In the response surface model approach

  4. Green building performance assessments

    Energy Technology Data Exchange (ETDEWEB)

    Larsson, N. [Natural Resources Canada, Ottawa, ON (Canada)

    1997-12-31

    A system for labelling buildings in a manner similar to product labelling already well established with respect to goods and materials in general, was proposed. The system envisaged would differ from existing labelling systems in that it would follow the principles incorporated into `Green Building Challenge `98`, (GBC`98) The GBC`98 is a two-year process of international building performance assessment, whose goal is to inform the international community of scientists, designers and builders about advances in green building performance. GBC`98 also aims to test and demonstrate an improved method for measuring building performance, establish international benchmarks for building performance while respecting regional and technical diversity, showcase `best-practice` examples of green buildings around the world, document successful elements in individual green buildings and offer direction to participating countries in the development of regionally sensitive assessment models. The genesis of GBC`98, its potential applications as a second generation tool for eco-labeling of buildings was summarized, along with a review of existing building performance assessment systems. 4 refs.

  5. Software Complexity Threatens Performance Portability

    Energy Technology Data Exchange (ETDEWEB)

    Gamblin, T. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-09-11

    Modern HPC software packages are rarely self-contained. They depend on a large number of external libraries, and many spend large fractions of their runtime in external subroutines. Performance portability depends not only on the effort of application teams, but also on the availability of well-tuned libraries. At most sites, the burden of maintaining libraries is shared by code teams and facilities. Facilities typically provide well-tuned default versions, but code teams frequently build with bleeding-edge compilers to achieve high performance. For this reason, HPC has no “standard” software stack, unlike other domains where performance is not critical. Incompatibilities among compilers and software versions force application teams and facility staff to re-build custom versions of libraries for each new toolchain. Because the number of potential configurations is combinatorial, and because HPC software is notoriously difficult to port to new machines [3, 7, 8], the tuning effort required to support and maintain performance-portable libraries outstrips the available manpower at most sites. Software complexity is a growing obstacle to performance portability for HPC.

  6. Performance comparison of genetic markers for high-throughput sequencing-based biodiversity assessment in complex communities.

    Science.gov (United States)

    Zhan, Aibin; Bailey, Sarah A; Heath, Daniel D; Macisaac, Hugh J

    2014-09-01

    Metabarcode surveys of DNA extracted from environmental samples are increasingly popular for biodiversity assessment in natural communities. Such surveys rely heavily on robust genetic markers. Therefore, analysis of PCR efficiency and subsequent biodiversity estimation for different types of genetic markers and their corresponding primers is important. Here, we test the PCR efficiency and biodiversity recovery potential of three commonly used genetic markers - nuclear small subunit ribosomal DNA (18S), mitochondrial cytochrome c oxidase subunit I (COI) and 16S ribosomal RNA (mt16S) - using 454 pyrosequencing of a zooplankton community collected from Hamilton Harbour, Ontario. We found that biodiversity detection power and PCR efficiency varied widely among these markers. All tested primers for COI failed to provide high-quality PCR products for pyrosequencing, but newly designed primers for 18S and 16S passed all tests. Furthermore, multiple analyses based on large-scale pyrosequencing (i.e. 1/2 PicoTiter plate for each marker) showed that primers for 18S recover more (38 orders) groups than 16S (10 orders) across all taxa, and four vs. two orders and nine vs. six families for Crustacea. Our results showed that 18S, using newly designed primers, is an efficient and powerful tool for profiling biodiversity in largely unexplored communities, especially when amplification difficulties exist for mitochondrial markers such as COI. Universal primers for higher resolution markers such as COI are still needed to address the possible low resolution of 18S for species-level identification.

  7. Cloud Computing for Complex Performance Codes.

    Energy Technology Data Exchange (ETDEWEB)

    Appel, Gordon John [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Hadgu, Teklu [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Klein, Brandon Thorin [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Miner, John Gifford [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-02-01

    This report describes the use of cloud computing services for running complex public domain performance assessment problems. The work consisted of two phases: Phase 1 was to demonstrate complex codes, on several differently configured servers, could run and compute trivial small scale problems in a commercial cloud infrastructure. Phase 2 focused on proving non-trivial large scale problems could be computed in the commercial cloud environment. The cloud computing effort was successfully applied using codes of interest to the geohydrology and nuclear waste disposal modeling community.

  8. Software Performs Complex Design Analysis

    Science.gov (United States)

    2008-01-01

    Designers use computational fluid dynamics (CFD) to gain greater understanding of the fluid flow phenomena involved in components being designed. They also use finite element analysis (FEA) as a tool to help gain greater understanding of the structural response of components to loads, stresses and strains, and the prediction of failure modes. Automated CFD and FEA engineering design has centered on shape optimization, which has been hindered by two major problems: 1) inadequate shape parameterization algorithms, and 2) inadequate algorithms for CFD and FEA grid modification. Working with software engineers at Stennis Space Center, a NASA commercial partner, Optimal Solutions Software LLC, was able to utilize its revolutionary, one-of-a-kind arbitrary shape deformation (ASD) capability-a major advancement in solving these two aforementioned problems-to optimize the shapes of complex pipe components that transport highly sensitive fluids. The ASD technology solves the problem of inadequate shape parameterization algorithms by allowing the CFD designers to freely create their own shape parameters, therefore eliminating the restriction of only being able to use the computer-aided design (CAD) parameters. The problem of inadequate algorithms for CFD grid modification is solved by the fact that the new software performs a smooth volumetric deformation. This eliminates the extremely costly process of having to remesh the grid for every shape change desired. The program can perform a design change in a markedly reduced amount of time, a process that would traditionally involve the designer returning to the CAD model to reshape and then remesh the shapes, something that has been known to take hours, days-even weeks or months-depending upon the size of the model.

  9. Performances. Assessment Resource Kit (ARK).

    Science.gov (United States)

    Forster, Margaret; Masters, Geoff

    Performance assessment is the assessment of students engaged in an activity. It is the on-the-spot evaluation of a performance, behavior, or interaction. Ordinarily, there is no concrete product that can be judged at a later date. In Developmental Assessment, teachers monitor student progress against a preconstructed map of developing skills,…

  10. OLEM Performance Assessment Information

    Data.gov (United States)

    U.S. Environmental Protection Agency — This asset includes a variety of data sets that measure the performance of Office of Land and Emergency Management (OLEM) programs in support of the Office of the...

  11. Supporting Reform through Performance Assessment.

    Science.gov (United States)

    Kitchen, Richard; Cherrington, April; Gates, Joanne; Hitchings, Judith; Majka, Maria; Merk, Michael; Trubow, George

    2002-01-01

    Describes the impact of a performance assessment project on six teachers' teaching at Borel Middle School in the San Mateo/Foster City School District in California. Reports positive gains in student performance on the tasks over three years. (YDS)

  12. Total System Performance Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, Yong Soo; Kang, Chul Hyung; Lee, Youn Myoung; Han, Ji Woong; Choi, Jong Won; Hahn, Pil Soo; Park, Jeong Hwa; Jeong, Mi Seon

    2007-06-15

    Based on the KAERI FEP list developed through the previous studies, the KAERI FEP Encyclopedia has been developed. Current version is 1.0 which includes all relevant FEPs to compose of two references and all alternative scenarios. Many interaction FEPs between scenario defining FEP(SDF) are created throughout the study. FEPs are classified into many Integrated FEP(IFEP) which eventually become the elements of the RES matrix. The FEAS program one of the component of the KAERI's CYPRUS information system is added to develop the FEP, RES, AC, AMF and finally scenarios. It assists to create transparent way to deal with assessment from the stage of the planning of the R and D to the final stage of the external audit and regulatory body review. Even though MASCOT-K and compartment analysis codes such as AMBER, GoldSim and Ecolego are excellent for TSPA they by in heritage possess a certain limitation especially to identify a proper migration cross sectional area when a relatively big component intersects with a tiny one such as a fracture. It is truly 3D phenomena in nature. MDPSA code is developed which is expected to overcome limitations in compartment models while successfully deals with natural disruptive events. The R and D target for the TSPA is to develop the sufficient scenarios and their variation cases to understand the safety of KRS in every possible aspect. For this, reference scenarios, alternative scenarios covering engineered barrier failure and natural events are developed and assessed respectively for around 100 cases. The stylized template to assess the Korean reference biosphere is developed using the AMBER. Three critical groups, agricultural, freshwater and marine water fishing groups are identified to assess the DCF following the guidelines of ICRP. Based on the QA principles of T2R3, the web based QA system is developed using the procedures in the USNRC 10CFR50 Appendix B. The QA system is combined with the PAID and FEAS to create the

  13. Technology Performance Level Assessment Methodology.

    Energy Technology Data Exchange (ETDEWEB)

    Roberts, Jesse D.; Bull, Diana L; Malins, Robert Joseph; Costello, Ronan Patrick; Aurelien Babarit; Kim Nielsen; Claudio Bittencourt Ferreira; Ben Kennedy; Kathryn Dykes; Jochem Weber

    2017-04-01

    The technology performance level (TPL) assessments can be applied at all technology development stages and associated technology readiness levels (TRLs). Even, and particularly, at low TRLs the TPL assessment is very effective as it, holistically, considers a wide range of WEC attributes that determine the techno-economic performance potential of the WEC farm when fully developed for commercial operation. The TPL assessment also highlights potential showstoppers at the earliest possible stage of the WEC technology development. Hence, the TPL assessment identifies the technology independent “performance requirements.” In order to achieve a successful solution, the entirety of the performance requirements within the TPL must be considered because, in the end, all the stakeholder needs must be achieved. The basis for performing a TPL assessment comes from the information provided in a dedicated format, the Technical Submission Form (TSF). The TSF requests information from the WEC developer that is required to answer the questions posed in the TPL assessment document.

  14. Human Performance Assessment Methods

    Science.gov (United States)

    1989-05-01

    Roth, Tinklenberg, and Kopell (1977) studied ethanol and marihuana , and reported that the amplitude of the P300 component of the evoked cortical...potential showed a drug effect and a set size effect. Both drugs differed significantly from placebo but not from each other, and marihuana increased the...slope. Crosby and Parkinson (1979) reported that performance of a ground-controlled approach by pilots affected the intercept but not the slope

  15. Performance assessment of housing associations

    NARCIS (Netherlands)

    Van Overmeeren, A.J.; Gruis, V.H.; Haffner, M.E.A.

    2009-01-01

    This article analyzes the function, design, and effects of a method to assess the performance of housing associations in the Netherlands. First, the roles of performance assessment are discussed from three perspectives: the association as an agent for the central government; the association as a fac

  16. Modeling Np and Pu transport with a surface complexation model and spatially variant sorption capacities: Implications for reactive transport modeling and performance assessments of nuclear waste disposal sites

    Science.gov (United States)

    Glynn, P.D.

    2003-01-01

    simulation conditions. Functional behaviors that cannot be fit include concentration trend reversals and radionuclide desorption spikes. Other simulation results are fit successfully but the fitted parameters (Kd and dispersivity) vary significantly depending on simulation conditions (e.g. "infiltration" vs. "cleanup" conditions). Notably, an increase in the variance of the specified sorption capacities results in a marked increase in the dispersion of the radionuclides. The results presented have implications for the simulation of radionuclide migration in performance assessments of nuclear waste-disposal sites, for the future monitoring of those sites, and more generally for modeling contaminant transport in ground-water environments. ?? 2003 Published by Elsevier Science Ltd.

  17. Managing teams performing complex innovation projects

    NARCIS (Netherlands)

    Oeij, P.R.A.; Vroome, E.M.M. de; Dhondt, S.; Gaspersz, J.B.R.

    2012-01-01

    Complexity of projects is hotly debated and a factor which affects innovativeness of team performance. Much attention in the past is paid to technical complexity and many issues are related to natural and physical sciences. A growing awareness of the importance of socio-organisational issues is anno

  18. Managing teams performing complex innovation projects

    NARCIS (Netherlands)

    Oeij, P.R.A.; Vroome, E.M.M. de; Dhondt, S.; Gaspersz, J.B.R.

    2012-01-01

    Complexity of projects is hotly debated and a factor which affects innovativeness of team performance. Much attention in the past is paid to technical complexity and many issues are related to natural and physical sciences. A growing awareness of the importance of socio-organisational issues is

  19. Managing teams performing complex innovation projects

    NARCIS (Netherlands)

    Oeij, P.R.A.; Vroome, E.M.M. de; Dhondt, S.; Gaspersz, J.B.R.

    2012-01-01

    Complexity of projects is hotly debated and a factor which affects innovativeness of team performance. Much attention in the past is paid to technical complexity and many issues are related to natural and physical sciences. A growing awareness of the importance of socio-organisational issues is anno

  20. The performance of regional timber industry complex

    Directory of Open Access Journals (Sweden)

    Maxim Aleksandrovich Shishelov

    2013-06-01

    Full Text Available The article reveals the results of the economic evaluation of the performance of regional timber industry complex of the NorthWestern Federal District based on the calculation of the structural indicator. The position and the role of forestry in the economy are shown. A comparative assessment of the characteristics of the regional forestry: volume of shipped products, industrial structure, product diversification, deep processing of wood is carried out. Structural economic performance timber for each subject Northwestern Federal District is designed the following factors that determine the high effectiveness of the system: the scale pulp and paper, wood diversification, export products are identified. The important methodological significance is the fact that the use of structural indicators will determine not only the effectiveness of forestry regions North-West in general, but their industries: forestry, woodworking, pulp and paper production, and the level of labor productivity and capital productivity. The presented results are of high practical and methodological value to determine the current state of forestry.

  1. Portfolio Assessment: Production and Reduction of Complexity

    DEFF Research Database (Denmark)

    Keiding, Tina Bering; Qvortrup, Ane

    2015-01-01

    Over the last two decades, the education system has witnessed a shift from summative, product-oriented assessment towards formative, process-oriented assessment. Among the different learning and assessment initiatives introduced in the slipstream of this paradigmatic turn, the portfolio seems......, produces particular conditions for the stimulation and observation of learning, thus increasing the complexity of observation of learning....

  2. Accuracy assessment with complex sampling designs

    Science.gov (United States)

    Raymond L. Czaplewski

    2010-01-01

    A reliable accuracy assessment of remotely sensed geospatial data requires a sufficiently large probability sample of expensive reference data. Complex sampling designs reduce cost or increase precision, especially with regional, continental and global projects. The General Restriction (GR) Estimator and the Recursive Restriction (RR) Estimator separate a complex...

  3. Assessing Complexity Results in Feature Theories

    CERN Document Server

    Trautwein, M

    1995-01-01

    In this paper, we assess the complexity results of formalisms that describe the feature theories used in computational linguistics. We show that from these complexity results no immediate conclusions can be drawn about the complexity of the recognition problem of unification grammars using these feature theories. On the one hand, the complexity of feature theories does not provide an upper bound for the complexity of such unification grammars. On the other hand, the complexity of feature theories need not provide a lower bound. Therefore, we argue for formalisms that describe actual unification grammars instead of feature theories. Thus the complexity results of these formalisms judge upon the hardness of unification grammars in computational linguistics.

  4. Joining Distributed Complex Objects: Definition and Performance

    NARCIS (Netherlands)

    Teeuw, W.B.; Teeuw, Wouter B.; Blanken, Henk

    1992-01-01

    The performance of a non-standard distributed database system is strongly ifluenced by complex objects. The effective exploitation of parallelism in querying them and a suitable structure to store them are required in order to obtain acceptable response times in these database environments where

  5. Joining distributed complex objects: definition and performance

    NARCIS (Netherlands)

    Teeuw, Wouter B.; Blanken, Henk M.

    1992-01-01

    The performance of a non-standard distributed database system is strongly ifluenced by complex objects. The effective exploitation of parallelism in querying them and a suitable structure to store them are required in order to obtain acceptable response times in these database environments where per

  6. PERFORMANCE ASSESSMENT FOR FIELD SPORTS

    Directory of Open Access Journals (Sweden)

    Christopher Carling

    2009-03-01

    Full Text Available DESCRIPTION The book covers the various sport science assessment procedures for sports such as soccer, rugby, field hockey and lacrosse. It provides detailed and clear information about laboratory and field-based methods that can be used to assess and improve both individual and team performance. PURPOSE The book aims to provide a contemporary reference tool for selection of appropriate testing procedures for sports across a range of scientific disciplines. FEATURES The text begins with a chapter on the rationales for performance assessments, the use of technology and the necessity for procedures to conform to scientific rigor, explaining the importance of test criteria. This chapter ends by emphasizing the importance of the feedback process and vital considerations for the practitioner when interpreting the data, selecting which information is most important and how to deliver this back to the athlete or coach in order to deliver a positive performance outcome. The next two chapters focus on psychological assessments with respect to skill acquisition, retention and execution providing a variety of qualitative and quantitative options, underpinned with scientific theory and contextualized in order to improve the understanding of the application of these methods to improve anticipation and decision-making to enhance game intelligence.Chapter 4 provides coverage of match analysis techniques in order to make assessments of technical, tactical and physical performances. Readers learn about a series of methodologies ranging from simplistic pen and paper options through to sophisticated technological systems with some exemplar data also provided. Chapters 5 through 7 cover the physiological based assessments, including aerobic, anaerobic and anthropometric procedures. Each chapter delivers a theoretical opening section before progressing to various assessment options and the authors make great efforts to relate to sport-specific settings. The final

  7. Quantification for complex assessment: uncertainty estimation in final year project thesis assessment

    Science.gov (United States)

    Kim, Ho Sung

    2013-12-01

    A quantitative method for estimating an expected uncertainty (reliability and validity) in assessment results arising from the relativity between four variables, viz examiner's expertise, examinee's expertise achieved, assessment task difficulty and examinee's performance, was developed for the complex assessment applicable to final year project thesis assessment including peer assessment. A guide map can be generated by the method for finding expected uncertainties prior to the assessment implementation with a given set of variables. It employs a scale for visualisation of expertise levels, derivation of which is based on quantified clarities of mental images for levels of the examiner's expertise and the examinee's expertise achieved. To identify the relevant expertise areas that depend on the complexity in assessment format, a graphical continuum model was developed. The continuum model consists of assessment task, assessment standards and criterion for the transition towards the complex assessment owing to the relativity between implicitness and explicitness and is capable of identifying areas of expertise required for scale development.

  8. Unit Performance Assessment System Development

    Science.gov (United States)

    1994-08-01

    Overview of the enhanced UPAS ...... . 57 xiv UNIT PERFORMANCE ASSESSMENT SYSTEM DEVELOPMENT Introduccion The networking of combat vehicle simulators...converting SIMNET terrain data from the UNIX format to a DOS format as part of their work on the development of Intelligent Semi-Automated Forces. The...and Social Sciences. (AD A226 956). LB&M Associates (1992). Phase I Small Business Innovative Research (SBIR) Program for Simulation Networkinc Training

  9. Performance Assessment Institute-NV

    Energy Technology Data Exchange (ETDEWEB)

    Lombardo, Joesph [Univ. of Nevada, Las Vegas, NV (United States)

    2012-12-31

    The National Supercomputing Center for Energy and the Environment’s intention is to purchase a multi-purpose computer cluster in support of the Performance Assessment Institute (PA Institute). The PA Institute will serve as a research consortium located in Las Vegas Nevada with membership that includes: national laboratories, universities, industry partners, and domestic and international governments. This center will provide a one-of-a-kind centralized facility for the accumulation of information for use by Institutions of Higher Learning, the U.S. Government, and Regulatory Agencies and approved users. This initiative will enhance and extend High Performance Computing (HPC) resources in Nevada to support critical national and international needs in "scientific confirmation". The PA Institute will be promoted as the leading Modeling, Learning and Research Center worldwide. The program proposes to utilize the existing supercomputing capabilities and alliances of the University of Nevada Las Vegas as a base, and to extend these resource and capabilities through a collaborative relationship with its membership. The PA Institute will provide an academic setting for interactive sharing, learning, mentoring and monitoring of multi-disciplinary performance assessment and performance confirmation information. The role of the PA Institute is to facilitate research, knowledge-increase, and knowledge-sharing among users.

  10. Evaluating the Performance of DFT Functionals in Assessing the Interaction Energy and Ground-State Charge Transfer of Donor/Acceptor Complexes: Tetrathiafulvalene−Tetracyanoquinodimethane (TTF−TCNQ) as a Model Case

    KAUST Repository

    Sini, Gjergji

    2011-03-08

    We have evaluated the performance of several density functional theory (DFT) functionals for the description of the ground-state electronic structure and charge transfer in donor/acceptor complexes. The tetrathiafulvalene- tetracyanoquinodimethane (TTF-TCNQ) complex has been considered as a model test case. Hybrid functionals have been chosen together with recently proposed long-range corrected functionals (ωB97X, ωB97X-D, LRC-ωPBEh, and LC-ωPBE) in order to assess the sensitivity of the results to the treatment and magnitude of exact exchange. The results show an approximately linear dependence of the ground-state charge transfer with the HOMO TTF-LUMOTCNQ energy gap, which in turn depends linearly on the percentage of exact exchange in the functional. The reliability of ground-state charge transfer values calculated in the framework of a monodeterminantal DFT approach was also examined. © 2011 American Chemical Society.

  11. Quality assurance in performance assessments

    Energy Technology Data Exchange (ETDEWEB)

    Maul, P.R.; Watkins, B.M.; Salter, P.; Mcleod, R [QuantiSci Ltd, Henley-on-Thames (United Kingdom)

    1999-01-01

    Following publication of the Site-94 report, SKI wishes to review how Quality Assurance (QA) issues could be treated in future work both in undertaking their own Performance Assessment (PA) calculations and in scrutinising documents supplied by SKB (on planning a repository for spent fuels in Sweden). The aim of this report is to identify the key QA issues and to outline the nature and content of a QA plan which would be suitable for SKI, bearing in mind the requirements and recommendations of relevant standards. Emphasis is on issues which are specific to Performance Assessments for deep repositories for radioactive wastes, but consideration is also given to issues which need to be addressed in all large projects. Given the long time over which the performance of a deep repository system must be evaluated, the demonstration that a repository is likely to perform satisfactorily relies on the use of computer-generated model predictions of system performance. This raises particular QA issues which are generally not encountered in other technical areas (for instance, power station operations). The traceability of the arguments used is a key QA issue, as are conceptual model uncertainty, and code verification and validation; these were all included in the consideration of overall uncertainties in the Site-94 project. Additionally, issues which are particularly relevant to SKI include: How QA in a PA fits in with the general QA procedures of the organisation undertaking the work. The relationship between QA as applied by the regulator and the implementor of a repository development programme. Section 2 introduces the discussion of these issues by reviewing the standards and guidance which are available from national and international organisations. This is followed in Section 3 by a review of specific issues which arise from the Site-94 exercise. An outline procedure for managing QA issues in SKI is put forward as a basis for discussion in Section 4. It is hoped that

  12. Y-12 National Security Complex Water Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Elam, Shana E.; Bassett, P.; McMordie Stoughton, Kate

    2010-11-01

    The Department of Energy's Federal Energy Management Program (FEMP) sponsored a water assessment at the Y 12 National Security Complex (Y 12) located in Oak Ridge, Tennessee. Driven by mandated water reduction goals of Executive Orders 13423 and 13514, the objective of the water assessment is to develop a comprehensive understanding of the current water-consuming applications and equipment at Y 12 and to identify key areas for water efficiency improvements that could be applied not only at Y-12 but at other Federal facilities as well. FEMP selected Pacific Northwest National Laboratory to coordinate and manage the water assessment. PNNL contracted Water Savers, LLC to lead the technical aspects of the water assessment. Water Savers provided key technical expertise in water auditing, metering, and cooling systems. This is the report of that effort, which concluded that the Y-12 facility could realize considerable water savings by implementing the recommended water efficiency opportunities.

  13. Improved power performance assessment methods

    Energy Technology Data Exchange (ETDEWEB)

    Frandsen, S.; Antoniou, I.; Dahlberg, J.A. [and others

    1999-03-01

    The uncertainty of presently-used methods for retrospective assessment of the productive capacity of wind farms is unacceptably large. The possibilities of improving the accuracy have been investigated and are reported. A method is presented that includes an extended power curve and site calibration. In addition, blockage effects with respect to reference wind speed measurements are analysed. It is found that significant accuracy improvements are possible by the introduction of more input variables such as turbulence and wind shear, in addition to mean wind speed and air density. Also, the testing of several or all machines in the wind farm - instead of only one or two - may provide a better estimate of the average performance. (au)

  14. Complexity curve: a graphical measure of data complexity and classifier performance

    Directory of Open Access Journals (Sweden)

    Julian Zubek

    2016-08-01

    Full Text Available We describe a method for assessing data set complexity based on the estimation of the underlining probability distribution and Hellinger distance. In contrast to some popular complexity measures, it is not focused on the shape of a decision boundary in a classification task but on the amount of available data with respect to the attribute structure. Complexity is expressed in terms of graphical plot, which we call complexity curve. It demonstrates the relative increase of available information with the growth of sample size. We perform theoretical and experimental examination of properties of the introduced complexity measure and show its relation to the variance component of classification error. We then compare it with popular data complexity measures on 81 diverse data sets and show that it can contribute to explaining performance of specific classifiers on these sets. We also apply our methodology to a panel of simple benchmark data sets, demonstrating how it can be used in practice to gain insights into data characteristics. Moreover, we show that the complexity curve is an effective tool for reducing the size of the training set (data pruning, allowing to significantly speed up the learning process without compromising classification accuracy. The associated code is available to download at: https://github.com/zubekj/complexity_curve (open source Python implementation.

  15. COMPLEX FUNCTIONAL ASSESSMENT OF THE HIP JOINT.

    Directory of Open Access Journals (Sweden)

    Maya S. Krastanova

    2015-09-01

    Full Text Available Introduction: In relation to the study reporting the effects of applying phased complex rehabilitation in patients with total hip arthroplasty, it has been concluded that the everyday clinical practice in Bulgaria does not apply complex examination, giving an objective picture about the extent of functional status of patients with trauma and diseases of the hip. Aim: The main goal of this report is to present a test which incorporates all known and routine research and in which the total number of points determines the functional status of patients with trauma and diseases of the hip. Material and Methods: Based on the Hip dysfunction and Osteoarthritis Outcome Score, the Harris Hip Score modified test, scale D’Aubigne and Postel and Iowa’s test for complex functional evaluation of the hip joint, we have developed a test including information about the degree of pain; goniometry and manual muscle testing of the hip; locomotor test – type of gait and adjuvants; test for Daily Activities of Life. The test has been developed on the basis of expert assessment by doctors and physiotherapists of the proposed indicators for evaluation and determination of the weighting factors’ contribution to the general condition of the patient. Conclusion: The developed and tested method of complex functional assessment of the hip joint enables our colleagues, dealing with trauma and diseases of the hip, to use it in various research and scientific projects, as well as in general medical practice.

  16. How Performance Assessments Affect Teaching and Learning.

    Science.gov (United States)

    Khattri, Nidhi; And Others

    1995-01-01

    Summarizes results of a 3-year national study of performance assessments' effects on teaching and learning, based on visits to 16 schools implementing these assessments. Performance assessments marginally affected curriculum, but substantially influenced instruction and teacher role. Changing assignment and assessment format will not increase…

  17. Assessing Differential Item Functioning in Performance Tests.

    Science.gov (United States)

    Zwick, Rebecca; And Others

    Although the belief has been expressed that performance assessments are intrinsically more fair than multiple-choice measures, some forms of performance assessment may in fact be more likely than conventional tests to tap construct-irrelevant factors. As performance assessment grows in popularity, it will be increasingly important to monitor the…

  18. Sustainability Assessment of a Biorefinery Complex in Thailand

    Directory of Open Access Journals (Sweden)

    Pariyapat Nilsalab

    2011-03-01

    Full Text Available In this paper, a biorefinery complex in Thailand was assessed vis-à-vis sustainability. The complex studied includes plantations of sugarcane and a biorefinery system composed of several units including, a sugar mill, power plant, ethanol factory and fertilizer plant. The assessment aimed at evaluating the environmental and socio-economic implications relating to molasses-based ethanol production and use, and maximized utilization of the biomass materials produced as part of the biorefinery complex. Global warming potential, human development index and total value added are the three indicators that were selected to perform the assessment. The results obtained revealed that the maximization of biomass utilization at the level of the biorefinery complex provide greenhouse gases emissions reduction benefits, enhanced living conditions for sugarcane farmers and employees of the biorefinery, and economic benefits, particularly with regard to profit and income generation. These results could serve as a first step to further improve and design indicators for sustainability assessment of biomass utilization.

  19. Performance assessment task team progress report

    Energy Technology Data Exchange (ETDEWEB)

    Wood, D.E.; Curl, R.U.; Armstrong, D.R.; Cook, J.R.; Dolenc, M.R.; Kocher, D.C.; Owens, K.W.; Regnier, E.P.; Roles, G.W.; Seitz, R.R. [and others

    1994-05-01

    The U.S. Department of Energy (DOE) Headquarters EM-35, established a Performance Assessment Task Team (referred to as the Team) to integrate the activities of the sites that are preparing performance assessments (PAs) for disposal of new low-level waste, as required by Chapter III of DOE Order 5820.2A, {open_quotes}Low-Level Waste Management{close_quotes}. The intent of the Team is to achieve a degree of consistency among these PAs as the analyses proceed at the disposal sites. The Team`s purpose is to recommend policy and guidance to the DOE on issues that impact the PAs, including release scenarios and parameters, so that the approaches are as consistent as possible across the DOE complex. The Team has identified issues requiring attention and developed discussion papers for those issues. Some issues have been completed, and the recommendations are provided in this document. Other issues are still being discussed, and the status summaries are provided in this document. A major initiative was to establish a subteam to develop a set of test scenarios and parameters for benchmarking codes in use at the various sites. The activities of the Team are reported here through December 1993.

  20. Total system performance assessment for Yucca Mountain

    Energy Technology Data Exchange (ETDEWEB)

    Boak, J.M. [USDOE Yucca Mountain Site Characterization Project Office, Las Vegas, NV (United States)

    1994-12-31

    As part of the U.S. Department of Energy`s evaluation of site suitability for a potential high-level radioactive waste repository, the long-term behavior of the mined geologic disposal system must be determined. This determination requires a knowledge of the characteristics of the present natural system, waste-package and engineered-system designs, a description of the environment around the emplacement zone, and descriptions of possible perturbations that may affect the nature of the engineered and natural systems. In 1991, participants in the Yucca Mountain Site Characterization Project completed a preliminary assessment of the likely performance of a potential repository at Yucca Mountain, Nevada. This preliminary assessment evaluated aqueous and gaseous flow, future climatic conditions, and disturbances to the system by basaltic volcanism and inadvertent human intrusion. A second total system performance evaluation is currently in progress. This second iteration is building on the previous analyses in a number of ways. More recent site characterization information and a much more complex model representing the source term are being incorporated. Multiple waste package designs, emplacement modes, and areal power densities are being analyzed. (author).

  1. Consideration of environmental change in performance assessments.

    Science.gov (United States)

    Pinedo, P; Thorne, M; Egan, M; Calvez, M; Kautsky, U

    2005-01-01

    Depending on the particular circumstances in which a post-closure performance assessment of a radioactive waste repository is made, it may be appropriate to follow simple or more complex approaches in characterising the biosphere. Several different Example Reference Biospheres were explored in BIOMASS Theme 1 to address a range of issues that arise. Here, consideration is given to Example Reference Biospheres relevant to representing the implications of changes that may occur within the biosphere system during the period over which releases of radionuclides from a disposal facility might take place. Mechanisms of change considered include those extrinsic and intrinsic to the system of interest. An overall methodology for incorporating environmental change into assessments is proposed. This includes screening of primary mechanisms of change; identification of possible time sequences of change; development of a coherent description of the regional landscape response for each time sequence; integration of source term and geosphere-biosphere interface information; identification and description of one or more time series of assessment biospheres; and evaluation of the advantages and disadvantages of simulating the effects of sequences of biosphere systems and the transitions between them, or of defining a set of biosphere systems to be represented individually in a non-sequential analysis. The usefulness of the methodology is explored in two site-specific examples and one generic example.

  2. Complex Analysis of Financial State and Performance of Construction Enterprises

    Directory of Open Access Journals (Sweden)

    Algirdas Krivka

    2015-12-01

    Full Text Available The paper analyses the financial state and performance of large constructions enterprises by applying financial indicators. As there is no one single decisive financial indicator enabling to objectively assess enterprise performance, the multi-criteria decision making (MCDM methods are applied with four groups of financial ratios (profitability, liquidity, solvency and asset turnover acting as evaluation criteria, while the alternatives assessed are two enterprises compared throughout the reference period of three years, also with the average indicator values of the whole construction sector. The weights of the criteria have been estimated by involving competent experts with chi-square test employed to check the degree of agreement of expert estimates. The research methodology contributes to the issue of complex evaluation of enterprise financial state and performance, while the result of the multi-criteria assessment – the ranking of enterprises and sector average with respect to financial state and performance – could be considered worth attention from business owners, potential investors, customers or other possible stakeholders.

  3. Assessment Environment for Complex Systems Software Guide

    Science.gov (United States)

    2013-01-01

    This Software Guide (SG) describes the software developed to test the Assessment Environment for Complex Systems (AECS) by the West Virginia High Technology Consortium (WVHTC) Foundation's Mission Systems Group (MSG) for the National Aeronautics and Space Administration (NASA) Aeronautics Research Mission Directorate (ARMD). This software is referred to as the AECS Test Project throughout the remainder of this document. AECS provides a framework for developing, simulating, testing, and analyzing modern avionics systems within an Integrated Modular Avionics (IMA) architecture. The purpose of the AECS Test Project is twofold. First, it provides a means to test the AECS hardware and system developed by MSG. Second, it provides an example project upon which future AECS research may be based. This Software Guide fully describes building, installing, and executing the AECS Test Project as well as its architecture and design. The design of the AECS hardware is described in the AECS Hardware Guide. Instructions on how to configure, build and use the AECS are described in the User's Guide. Sample AECS software, developed by the WVHTC Foundation, is presented in the AECS Software Guide. The AECS Hardware Guide, AECS User's Guide, and AECS Software Guide are authored by MSG. The requirements set forth for AECS are presented in the Statement of Work for the Assessment Environment for Complex Systems authored by NASA Dryden Flight Research Center (DFRC). The intended audience for this document includes software engineers, hardware engineers, project managers, and quality assurance personnel from WVHTC Foundation (the suppliers of the software), NASA (the customer), and future researchers (users of the software). Readers are assumed to have general knowledge in the field of real-time, embedded computer software development.

  4. Contractor Performance Assessment Reporting System

    Data.gov (United States)

    US Agency for International Development — CPARS is a web-based system used to input data on contractor performance. Reports from the system are used as an aid in awarding contracts to contractors that...

  5. Performance Assessment in Courts - The Swiss Case

    Directory of Open Access Journals (Sweden)

    Andreas Lienhard

    2014-12-01

    Full Text Available Abstract Performance assessments have become commonplace in management, even in the public sector. With the increasing pressure on courts to perform while making efficient use of resources, performance assessments in the justice system are also gaining in importance. However, the need for judicial independence poses special challenges for performance assessments in courts. Against this background, this article conducts a constitutional appraisal, and contrasts the need for judicial independence with the principles governing effectiveness and efficiency, self-government and supervision, and appointment and re-appointment. A duty to guarantee justice can be derived from this that does not in principle exclude the performance assessment of judges, but even renders it essential, subject to compliance with certain requirements. In these circumstances, it seems hardly surprising that numerous countries conduct performance assessments of judges and also that various international institutions have developed principles for this purpose, a summary of which is presented – in Switzerland’s case based on a recently conducted survey. In the field of conflict between the guaranteeing justice and protecting the judiciary, the following key questions arise in particular: What is the purpose of performance assessments and what are the consequences?What is subjected to a performance assessment and what are the assessment criteria?How is performance recorded as the basis for the performance assessment?Who is subjected to a performance assessment, and must a distinction be made between judges in higher and lower courts?Who carries out the performance assessment and what methods of protecting one’s rights are available?Who should receive the results of the performance assessment?The contribution sketches out possible answers to these key questions and aims to encourage academics and practitioners to give further consideration to this subject.

  6. The Future Is Performance Assessment

    Science.gov (United States)

    French, Dan

    2017-01-01

    As more people question the value of standardized testing, the public appetite for a change in the accountability system grows. A 2016 national survey found that "voters consider standardized tests the least important factor in measuring the performance of students," preferring instead to have a multiple-measures data dashboard of…

  7. Expert judgement in performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Wilmot, R.D.; Galson, D.A. [Galson Sciences Ltd, Oakham (United Kingdom)

    2000-01-01

    This report is a pilot study that systematically describes the various types of expert judgement that are made throughout the development of a PA, and summarizes existing tools and practices for dealing with expert judgements. The report also includes recommendations for further work in the area of expert judgement. Expert judgements can be classified in a number of ways, including classification according to why the judgements are made and according to how the judgements are made. In terms of why judgements are made, there is a broad distinction between: Judgements concerning data that are made because alternatives are not feasible; and Judgements about the conduct of a PA that are made because there are no alternative approaches for making the decision. In the case of how judgements are made, the report distinguishes between non-elicited judgements made by individuals, non-elicited judgements made by groups, and elicited judgements made by individuals or groups. These types of judgement can generally be distinguished by the extent of the associated documentation, and hence their traceability. Tools for assessing judgements vary depending on the type of judgements being examined. Key tools are peer review, an appropriate QA regime, documentation, and elicitation. Dialogue with stake holders is also identified as important in establishing whether judgements are justified in the context in which they are used. The PA process comprises a number of stages, from establishing the assessment context, through site selection and repository design, to scenario and model development and parametrisation. The report discusses how judgements are used in each of these stages, and identifies which of the tools and procedures for assessing judgements are most appropriate at each stage. Recommendations for further work include the conduct of a trial expert elicitation to gain experience in the advantages and disadvantages of this technique, the development of guidance for peer

  8. Assessing Complex Learning Objectives through Analytics

    Science.gov (United States)

    Horodyskyj, L.; Mead, C.; Buxner, S.; Semken, S. C.; Anbar, A. D.

    2016-12-01

    A significant obstacle to improving the quality of education is the lack of easy-to-use assessments of higher-order thinking. Most existing assessments focus on recall and understanding questions, which demonstrate lower-order thinking. Traditionally, higher-order thinking is assessed with practical tests and written responses, which are time-consuming to analyze and are not easily scalable. Computer-based learning environments offer the possibility of assessing such learning outcomes based on analysis of students' actions within an adaptive learning environment. Our fully online introductory science course, Habitable Worlds, uses an intelligent tutoring system that collects and responds to a range of behavioral data, including actions within the keystone project. This central project is a summative, game-like experience in which students synthesize and apply what they have learned throughout the course to identify and characterize a habitable planet from among hundreds of stars. Student performance is graded based on completion and accuracy, but two additional properties can be utilized to gauge higher-order thinking: (1) how efficient a student is with the virtual currency within the project and (2) how many of the optional milestones a student reached. In the project, students can use the currency to check their work and "unlock" convenience features. High-achieving students spend close to the minimum amount required to reach these goals, indicating a high-level of concept mastery and efficient methodology. Average students spend more, indicating effort, but lower mastery. Low-achieving students were more likely to spend very little, which indicates low effort. Differences on these metrics were statistically significant between all three of these populations. We interpret this as evidence that high-achieving students develop and apply efficient problem-solving skills as compared to lower-achieving student who use more brute-force approaches.

  9. Field performance assessment and optimization

    Energy Technology Data Exchange (ETDEWEB)

    Alba, Juan Carlos [Ziff Energy Group (Canada)

    2011-07-01

    Ziff Energy Group is a company with a presence in over 60 countries, where it operates in the oil and gas industry, particularly the heavy oil sector. The aim of this presentation is to show the benefits of benchmarking in the heavy oil industry. Heavy oil is defined as oil with a gravity between 10 and 20 API and a viscosity of 100 to 10,000 cp; resources are distributed through all the continents. Benchmarking consists in analyzing performance, looking for new ways to improve it, and implementing those new methods; benchmarking thus promotes measurement and improvement within a company. However, benchmarking in the heavy oil sector presents challenges, due to the difference of the oil play properties, the different cultures inherent in each company, and the abundance of data. This presentation demonstrated that, despite the challenges, benchmarking is a useful tool for optimizing heavy oil operations.

  10. Metallacumulenes and carbide complexes. Final performance report

    Energy Technology Data Exchange (ETDEWEB)

    Selegue, J.P.

    1992-12-31

    We investigated many aspects of transition metal complexes of carbon-rich ligands, including cumulated transition metal carbene complexes of the types vinylidene (M=C=CR{sub 2})(M = Fe, Ru, Os, Mo, W), allenylidene (M=C=C=CR{sub 2}), and butatrienylidene (M=C=C=CR{sub 2}), as well as ``naked`` carbon ligands C{sub 1}, C{sub 2}, and C{sub 3}. In the last 3 years, we began to put some effort into studying the fullerenes. Finally, we investigated initial aspects of the coordination chemistry of thiophenes, from the perspectives of (1) modeling the transition- metal-catalyzed hydrodesulfurization of fossil fuels and (2) development of metal-doped, polythiophene-based polymers.

  11. Performance Assessment of Mergers and Acquisitions

    DEFF Research Database (Denmark)

    Wang, Daojuan; Moini, Hamid

    2012-01-01

    Corporate mergers and acquisitions (M&As) have been increasing popular during these decades. However, a majority of research show failure rate (40% - 80%) has not significantly changed. This “success paradox” triggers us to reflect on performance assessment of M&As: how the performance of M...... on the performance measures and benchmarks adopted in M&A research field and the relevant empirical results. We find that the definitions of performance varied in terms of accounting, financial, operational and perceptual metrics. And performance assessment is sensitive to the definition of performance, methodology...

  12. Complex Heat Exchangers for Improved Performance

    Science.gov (United States)

    Bran, Gabriela Alejandra

    After a detailed literature review, it was determined that there was a need for a more comprehensive study on the transient behavior of heat exchangers. Computational power was not readily available when most of the work on transient heat exchangers was done (1956 - 1986), so most of these solutions have restrictions, or very specific assumptions. More recently, authors have obtained numerical solutions for more general problems (2003 - 2013), but they have investigated very specific conditions, and cases. For a more complex heat exchanger (i.e. with heat generation), the transient solutions from literature are no longer valid. There was a need to develop a numerical model that relaxes the restrictions of current solutions to explore conditions that have not been explored. A one dimensional transient heat exchanger model was developed. There are no restrictions on the fluids and wall conditions. The model is able to obtain a numerical solution for a wide range of fluid properties and mass flow rates. Another innovative characteristic of the numerical model is that the boundary and initial conditions are not limited to constant values. The boundary conditions can be a function of time (i.e. sinusoidal signal), and the initial conditions can be a function of position. Four different cases were explored in this work. In the first case, the start-up of a system was investigated where the whole system is assumed to be at the same temperature. In the second case, the new steady state in case one gets disrupted by a smaller inlet temperature step change. In the third case, the new steady state in case one gets disrupted by a step change in one of the mass flow rates. The response of these three cases show that there are different transient behaviors, and they depend on the conditions imposed on the system. The fourth case is a system that has a sinusoidal time varying inlet temperature for one of the flows. The results show that the sinusoidal behavior at the inlet

  13. Green building performance prediction/assessment

    Energy Technology Data Exchange (ETDEWEB)

    Papamichael, Konstantinos

    2000-02-01

    To make decisions, building designers need to predict and assess the performance of their ideas with respect to various criteria, such as comfort, esthetics, energy, environmental impact, economics, etc. Performance prediction with respect to environmental impact requires complicated models and massive computations, which are usually possible only through computer-based tools. This paper focuses on the use of computer-based tools for predicting and assessing building performance with respect to environmental impact criteria for the design of green buildings. It contains analyses of green performance prediction/assessment and descriptions of available tools, along with discussions on their use by different types of users. Finally, it includes analyses of the cost and benefits of green performance prediction and assessment.

  14. Performance and Complexity Analysis of a Reduced Iterations LLL Algorithm

    Directory of Open Access Journals (Sweden)

    Nizar OUNI

    2016-05-01

    Full Text Available Multiple-input multiple-output (MIMO systems are playing an increasing and interesting role in the recent wireless communication. The complexity and the performance of the systems are driving the different studies and researches. Lattices Reduction techniques bring more resources to investigate the complexity and performances of such systems. In this paper, we look to modify a fixed complexity verity of the LLL algorithm to reduce the computation operations by reducing the number of iterations without important performance degradation. Our proposal shows that we can achieve a good performance results while avoiding extra iteration that doesn’t bring much performance.

  15. Portfolio Assessment: Production and Reduction of Complexity

    Science.gov (United States)

    Qvortrup, Ane; Keiding, Tina Bering

    2015-01-01

    Over the last two decades, the education system has witnessed a shift from summative, product-oriented assessment towards formative, process-oriented assessment. Among the different learning and assessment initiatives introduced in the slipstream of this paradigmatic turn, the portfolio seems to have become one of the most popular. By redescribing…

  16. Portfolio Assessment: Production and Reduction of Complexity

    Science.gov (United States)

    Qvortrup, Ane; Keiding, Tina Bering

    2015-01-01

    Over the last two decades, the education system has witnessed a shift from summative, product-oriented assessment towards formative, process-oriented assessment. Among the different learning and assessment initiatives introduced in the slipstream of this paradigmatic turn, the portfolio seems to have become one of the most popular. By redescribing…

  17. VISUAL ART TEACHERS AND PERFORMANCE ASSESSMENT ...

    African Journals Online (AJOL)

    Charles

    qualitative research design; an aspect of descriptive survey research aiming at depicting the situation of .... multiple evaluation methods (performance and portfolio assessment, etc.) .... These questions might will lead us to look at what has.

  18. The effects of performance-based assessment criteria on student performance and self-assessment skills.

    Science.gov (United States)

    Fastré, Greet Mia Jos; van der Klink, Marcel R; van Merriënboer, Jeroen J G

    2010-10-01

    This study investigated the effect of performance-based versus competence-based assessment criteria on task performance and self-assessment skills among 39 novice secondary vocational education students in the domain of nursing and care. In a performance-based assessment group students are provided with a preset list of performance-based assessment criteria, describing what students should do, for the task at hand. The performance-based group is compared to a competence-based assessment group in which students receive a preset list of competence-based assessment criteria, describing what students should be able to do. The test phase revealed that the performance-based group outperformed the competence-based group on test task performance. In addition, higher performance of the performance-based group was reached with lower reported mental effort during training, indicating a higher instructional efficiency for novice students.

  19. Performance Assessment and Active System Monitoring for Refrigeration Systems

    DEFF Research Database (Denmark)

    Green, Torben

    for algorithms that ensures or improves the performance of the system. A supermarket refrigeration system is usually a complex and distributed control system, and it can therefore be difficult to assess the performance without a formal method. The main interest for a supermarket, with respect...... of the refrigeration system has been addressed in the project. The proposed methods for improvement relies on a minimum of detailed knowledge about the refrigeration system. In addition, since a refrigeration system often operates in steady state an active system monitoring setup has been proposed, to enable...... a method for assessing the operational performance at a plan-wide level and is therefore providing a tool for improving the plant-wide performance. The performance function has been used in dierent setups to improve the performance of the refrigeration system. Static and the dynamic performance...

  20. Personality, Assessment Methods and Academic Performance

    Science.gov (United States)

    Furnham, Adrian; Nuygards, Sarah; Chamorro-Premuzic, Tomas

    2013-01-01

    This study examines the relationship between personality and two different academic performance (AP) assessment methods, namely exams and coursework. It aimed to examine whether the relationship between traits and AP was consistent across self-reported versus documented exam results, two different assessment techniques and across different…

  1. Assessing the performance of health technology assessment organizations: a framework.

    Science.gov (United States)

    Lafortune, Louise; Farand, Lambert; Mondou, Isabelle; Sicotte, Claude; Battista, Renaldo

    2008-01-01

    In light of growing demands for public accountability, the broadening scope of health technology assessment organizations (HTAOs) activities and their increasing role in decision-making underscore the importance for them to demonstrate their performance. Based on Parson's social action theory, we propose a conceptual model that includes four functions an organization needs to balance to perform well: (i) goal attainment, (ii) production, (iii) adaptation to the environment, and (iv) culture and values maintenance. From a review of the HTA literature, we identify specific dimensions pertaining to the four functions and show how they relate to performance. We compare our model with evaluations reported in the scientific and gray literature to confirm its capacity to accommodate various evaluation designs, contexts of evaluation, and organizational models and perspectives. Our findings reveal the dimensions of performance most often assessed and other important ones that, hitherto, remain unexplored. The model provides a flexible and theoretically grounded tool to assess the performance of HTAOs.

  2. Assessing irrigation performance by using remote sensing

    NARCIS (Netherlands)

    Bandara, K.M.P.S.

    2006-01-01

    Keywords: Performance indicators, performance assessment, diagnostic approach, SEBAL, target level, grain yield, water productivity, error estimation, spatio-temporal resolution.

    In

  3. Performance Assessment of Mergers and Acquisitions

    DEFF Research Database (Denmark)

    Wang, Daojuan; Moini, Hamid

    2012-01-01

    Corporate mergers and acquisitions (M&As) have been increasing popular during these decades. However, a majority of research show failure rate (40% - 80%) has not significantly changed. This “success paradox” triggers us to reflect on performance assessment of M&As: how the performance of M...

  4. Construct Validity of Three Clerkship Performance Assessments

    Science.gov (United States)

    Lee, Ming; Wimmers, Paul F.

    2010-01-01

    This study examined construct validity of three commonly used clerkship performance assessments: preceptors' evaluations, OSCE-type clinical performance measures, and the NBME [National Board of Medical Examiners] medicine subject examination. Six hundred and eighty-six students taking the inpatient medicine clerkship from 2003 to 2007…

  5. Physician Performance Assessment: Prevention of Cardiovascular Disease

    Science.gov (United States)

    Lipner, Rebecca S.; Weng, Weifeng; Caverzagie, Kelly J.; Hess, Brian J.

    2013-01-01

    Given the rising burden of healthcare costs, both patients and healthcare purchasers are interested in discerning which physicians deliver quality care. We proposed a methodology to assess physician clinical performance in preventive cardiology care, and determined a benchmark for minimally acceptable performance. We used data on eight…

  6. Enabling performance skills: Assessment in engineering education

    Science.gov (United States)

    Ferrone, Jenny Kristina

    Current reform in engineering education is part of a national trend emphasizing student learning as well as accountability in instruction. Assessing student performance to demonstrate accountability has become a necessity in academia. In newly adopted criterion proposed by the Accreditation Board for Engineering and Technology (ABET), undergraduates are expected to demonstrate proficiency in outcomes considered essential for graduating engineers. The case study was designed as a formative evaluation of freshman engineering students to assess the perceived effectiveness of performance skills in a design laboratory environment. The mixed methodology used both quantitative and qualitative approaches to assess students' performance skills and congruency among the respondents, based on individual, team, and faculty perceptions of team effectiveness in three ABET areas: Communications Skills. Design Skills, and Teamwork. The findings of the research were used to address future use of the assessment tool and process. The results of the study found statistically significant differences in perceptions of Teamwork Skills (p teamwork, among freshman engineering students; (2) incorporate feedback into the learning process; (3) strengthen the assessment process with a follow-up plan that specifically targets performance skill deficiencies, and (4) integrate the assessment instrument and practice with ongoing curriculum development. The findings generated by this study provides engineering departments engaged in assessment activity, opportunity to reflect, refine, and develop their programs as it continues. It also extends research on ABET competencies of engineering students in an under-investigated topic of factors correlated with team processes, behavior, and student learning.

  7. Quantitative performance assessments for neuromagnetic imaging systems.

    Science.gov (United States)

    Koga, Ryo; Hiyama, Ei; Matsumoto, Takuya; Sekihara, Kensuke

    2013-01-01

    We have developed a Monte-Carlo simulation method to assess the performance of neuromagnetic imaging systems using two kinds of performance metrics: A-prime metric and spatial resolution. We compute these performance metrics for virtual sensor systems having 80, 160, 320, and 640 sensors, and discuss how the system performance is improved, depending on the number of sensors. We also compute these metrics for existing whole-head MEG systems, MEGvision™ (Yokogawa Electric Corporation, Tokyo, Japan) that uses axial-gradiometer sensors, and TRIUX™ (Elekta Corporate, Stockholm, Sweden) that uses planar-gradiometer and magnetometer sensors. We discuss performance comparisons between these significantly different systems.

  8. Gamma camera performance: technical assessment protocol

    Energy Technology Data Exchange (ETDEWEB)

    Bolster, A.A. [West Glasgow Hospitals NHS Trust, London (United Kingdom). Dept. of Clinical Physics; Waddington, W.A. [University College London Hospitals NHS Trust, London (United Kingdom). Inst. of Nuclear Medicine

    1996-12-31

    This protocol addresses the performance assessment of single and dual headed gamma cameras. No attempt is made to assess the performance of any associated computing systems. Evaluations are usually performed on a gamma camera commercially available within the United Kingdom and recently installed at a clinical site. In consultation with the manufacturer, GCAT selects the site and liaises with local staff to arrange a mutually convenient time for assessment. The manufacturer is encouraged to have a representative present during the evaluation. Three to four days are typically required for the evaluation team to perform the necessary measurements. When access time is limited, the team will modify the protocol to test the camera as thoroughly as possible. Data are acquired on the camera`s computer system and are subsequently transferred to the independent GCAT computer system for analysis. This transfer from site computer to the independent system is effected via a hardware interface and Interfile data transfer. (author).

  9. Performance Reliability Prediction of Complex System Based on the Condition Monitoring Information

    Directory of Open Access Journals (Sweden)

    Hongxing Wang

    2013-01-01

    Full Text Available Complex system performance reliability prediction is one of the means to understand complex systems reliability level, make maintenance decision, and guarantee the safety of operation. By the use of complex system condition monitoring information and condition monitoring information based on support vector machine, the paper aims to provide an evaluation of the degradation of complex system performance. With degradation assessment results as input variables, the prediction model of reliability is established in Winer random process. Taking the aircraft engine as an example, the effectiveness of the proposed method is verified in the paper.

  10. Documenting Student Performance through Effective Performance Assessments: Workshop Summary. Horticulture.

    Science.gov (United States)

    Ohio State Univ., Columbus. Agricultural Education Curriculum Materials Service.

    This document contains materials about and from a workshop that was conducted to help Ohio horticulture teachers learn to document student competence through effective performance assessments. The document begins with background information about the workshop and a list of workshop objectives. Presented next is a key to the 40 performance…

  11. Complex Assessments, Teacher Inferences, and Instructional Decision-Making

    OpenAIRE

    2012-01-01

    The purpose of this study is to understand how teachers make sense of data from a complex set of reading assessments and how inferences they derive from the data affect decisions about instruction. There are two key research questions - 1) How does a teacher's developing expertise with a complex set of assessments (assessment literacy) affect the quality of the inferences they make about student learning?; and 2) How does the extent of a teacher's Pedagogical Content Knowledge affect the ran...

  12. Pitch Sequence Complexity and Long-Term Pitcher Performance

    Directory of Open Access Journals (Sweden)

    Joel R. Bock

    2015-03-01

    Full Text Available Winning one or two games during a Major League Baseball (MLB season is often the difference between a team advancing to post-season play, or “waiting until next year”. Technology advances have made it feasible to augment historical data with in-game contextual data to provide managers immediate insights regarding an opponent’s next move, thereby providing a competitive edge. We developed statistical models of pitcher behavior using pitch sequences thrown during three recent MLB seasons (2011–2013. The purpose of these models was to predict the next pitch type, for each pitcher, based on data available at the immediate moment, in each at-bat. Independent models were developed for each player’s most frequent four pitches. The overall predictability of next pitch type is 74:5%. Additional analyses on pitcher predictability within specific game situations are discussed. Finally, using linear regression analysis, we show that an index of pitch sequence predictability may be used to project player performance in terms of Earned Run Average (ERA and Fielding Independent Pitching (FIP over a longer term. On a restricted range of the independent variable, reducing complexity in selection of pitches is correlated with higher values of both FIP and ERA for the players represented in the sample. Both models were significant at the α = 0.05 level (ERA: p = 0.022; FIP: p = 0.0114. With further development, such models may reduce risk faced by management in evaluation of potential trades, or to scouts assessing unproven emerging talent. Pitchers themselves might benefit from awareness of their individual statistical tendencies, and adapt their behavior on the mound accordingly. To our knowledge, the predictive model relating pitch-wise complexity and long-term performance appears to be novel.

  13. Power system cascading risk assessment based on complex network theory

    Science.gov (United States)

    Wang, Zhuoyang; Hill, David J.; Chen, Guo; Dong, Zhao Yang

    2017-09-01

    When a single failure occurs in a vulnerable part of a power system, this may cause a large area cascading event. Therefore, an advanced method that can assess the risks during cascading events is needed. In this paper, an improved complex network model for power system risk assessment is proposed. Risk is defined by consequence and probability of the failures in this model, which are affected by both power factors and network structure. Compared with existing risk assessment models, the proposed one can evaluate the risk of the system comprehensively during a cascading event by combining the topological and electrical information. A new cascading event simulation module is adopted to identify the power grid cascading chain from a system-level view. In addition, simulations are investigated on the IEEE 14 bus system and IEEE 39 bus system respectively to illustrate the performance of the proposed module. The simulation results demonstrate that the proposed method is effective in a power grid risk assessment during cascading event.

  14. Children's construction task performance and spatial ability: controlling task complexity and predicting mathematics performance.

    Science.gov (United States)

    Richardson, Miles; Hunt, Thomas E; Richardson, Cassandra

    2014-12-01

    This paper presents a methodology to control construction task complexity and examined the relationships between construction performance and spatial and mathematical abilities in children. The study included three groups of children (N = 96); ages 7-8, 10-11, and 13-14 years. Each group constructed seven pre-specified objects. The study replicated and extended previous findings that indicated that the extent of component symmetry and variety, and the number of components for each object and available for selection, significantly predicted construction task difficulty. Results showed that this methodology is a valid and reliable technique for assessing and predicting construction play task difficulty. Furthermore, construction play performance predicted mathematical attainment independently of spatial ability.

  15. In control: systematic assessment of microarray performance.

    Science.gov (United States)

    van Bakel, Harm; Holstege, Frank C P

    2004-10-01

    Expression profiling using DNA microarrays is a powerful technique that is widely used in the life sciences. How reliable are microarray-derived measurements? The assessment of performance is challenging because of the complicated nature of microarray experiments and the many different technology platforms. There is a mounting call for standards to be introduced, and this review addresses some of the issues that are involved. Two important characteristics of performance are accuracy and precision. The assessment of these factors can be either for the purpose of technology optimization or for the evaluation of individual microarray hybridizations. Microarray performance has been evaluated by at least four approaches in the past. Here, we argue that external RNA controls offer the most versatile system for determining performance and describe how such standards could be implemented. Other uses of external controls are discussed, along with the importance of probe sequence availability and the quantification of labelled material.

  16. The complexity of the Latin Square task and its influ-ence on children's performance

    Institute of Scientific and Technical Information of China (English)

    ZHANG Li; XIN ZiQiang; LIN ChongDe; LI Hong

    2009-01-01

    Prior studies analyzed the complexity of the Latin Square task solely based on the relational complexity theory, which, with the relational complexity defined by the complexity of relations processed in paral-lel, could not fully predict children's performance on the task. So we developed an alternative method to analyze the task complexity by the relational complexity and the necessary processing steps to find a solution. The present study tested the validity of the new method applying to the Latin Square task and investigated how the task complexity influenced children's performance on the task. 195 pupils from Grade 2-5 were recruited to perform computerized Latin Square task of 15 items. The results showed that: (i) The children's performance on the Latin Square task fitted perfectly to the predictions by the Rasch measurement model. The relational complexity and the necessary processing steps both validly predicted the children's reaction time for correct answers and the item difficulty levels assessed by the Rasch analysis. This validated our method for task complexity analysis. (ii) Generally, all the 2nd-5th graders performed well on the items whose relational complexity was binary or ternary. However, they had difficulties in solving the quaternary items, although there was improvement from grade 2 to grade 5.

  17. Assessing Causality in a Complex Security Environment

    Science.gov (United States)

    2015-01-01

    how. “The Arab Spring. That shows that the image of an Iraqi woman holding up her purple fingertip after having voted, it resonated with the entire...would not disturb the dream world of self -worship in which he so often chose to live.”5 Assess the Full Spectrum of Causal Factors Involved. Since...desires and perceptions that we have. Just as a mirror reflects us, mirror-imaging suggests the danger of projecting our strategic preferences onto

  18. Dehydration: physiology, assessment, and performance effects.

    Science.gov (United States)

    Cheuvront, Samuel N; Kenefick, Robert W

    2014-01-01

    This article provides a comprehensive review of dehydration assessment and presents a unique evaluation of the dehydration and performance literature. The importance of osmolality and volume are emphasized when discussing the physiology, assessment, and performance effects of dehydration. The underappreciated physiologic distinction between a loss of hypo-osmotic body water (intracellular dehydration) and an iso-osmotic loss of body water (extracellular dehydration) is presented and argued as the single most essential aspect of dehydration assessment. The importance of diagnostic and biological variation analyses to dehydration assessment methods is reviewed and their use in gauging the true potential of any dehydration assessment method highlighted. The necessity for establishing proper baselines is discussed, as is the magnitude of dehydration required to elicit reliable and detectable osmotic or volume-mediated compensatory physiologic responses. The discussion of physiologic responses further helps inform and explain our analysis of the literature suggesting a ≥ 2% dehydration threshold for impaired endurance exercise performance mediated by volume loss. In contrast, no clear threshold or plausible mechanism(s) support the marginal, but potentially important, impairment in strength, and power observed with dehydration. Similarly, the potential for dehydration to impair cognition appears small and related primarily to distraction or discomfort. The impact of dehydration on any particular sport skill or task is therefore likely dependent upon the makeup of the task itself (e.g., endurance, strength, cognitive, and motor skill).

  19. Performance Assessment for Pump-and-Treat Closure or Transition

    Energy Technology Data Exchange (ETDEWEB)

    Truex, Michael J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Johnson, Christian D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Becker, Dave J. [U.S. Army Corps of Engineers Environmental and Munitions Center of Expertise, Huntsville, AL (United States); Lee, Michelle H. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Nimmons, Michael J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2015-09-29

    A structured performance assessment approach is useful to evaluate pump-and-treat (P&T) groundwater remediation, which has been applied at numerous sites. Consistent with the U.S. Environmental Protection Agency’s Groundwater Road Map, performance assessment during remedy implementation may be needed, and should consider remedy optimization, transition to alternative remedies, or remedy closure. In addition, a recent National Research Council study examined groundwater remediation at complex contaminated sites and concluded that it may be beneficial to evaluate remedy performance and the potential need for transition to alternative approaches at these sites. The intent of this document is to provide a structured approach for assessing P&T performance to support a decision to optimize, transition, or close a P&T remedy. The process presented in this document for gathering information and performing evaluations to support P&T remedy decisions includes use of decision elements to distinguish between potential outcomes of a remedy decision. Case studies are used to augment descriptions of decision elements and to illustrate each type of outcome identified in the performance assessment approach. The document provides references to resources for tools and other guidance relevant to conducting the P&T assessment.

  20. Comparability of Two Cognitive Performance Assessment Systems

    Science.gov (United States)

    1992-02-01

    reauesters Qualified requesters may obtain copies from the Defense Technical Information Center (DTIC), Cameron Station , Alexandria, Virginia 22314...photometric expertise. Thanks also to Mr. Jim A. Chiaramonte, SPC4 Angelia Mattingly, 2LT Shawn Prickett , and PFC Hilda Pou for help in preparing the report...presentation and subject response characteristics of performance assessment batteries (PABs) which are implemented on the different computer systems

  1. Pioneer CESA Guidance Project; Counselor Performance Assessment.

    Science.gov (United States)

    Bryant, Brenda; Andrews, Theodore

    This document contains the performance assessment instruments and criteria which will be applied as part of the certification process for beginning school counselors in Georgia. The purpose of the process is to provide the candidate with an opportunity to demonstrate the essential competencies on the job. While the candidate bears the ultimate…

  2. Assessing the Performance of Business Unit Managers

    NARCIS (Netherlands)

    Bouwens, J.F.M.G.; van Lent, L.A.G.M.

    2006-01-01

    Using a sample of 140 managers, we investigate the use of various performance metrics in determining the periodic assessment, bonus decisions, and career paths of business unit managers.We show that the weight on accounting return measures is associated with the authority of these managers, and we d

  3. The Uses and Limits of Performance Assessment.

    Science.gov (United States)

    Eisner, Elliot W.

    1999-01-01

    Performance assessment can help educators develop ways to reveal individual students' distinctive features and secure information about learning. These opportunities will be wasted unless the public's attitudes and expectations toward schooling are changed. Attitudes cannot change without revising policies inhibiting school children's educational…

  4. The effects of performance-based assessment criteria on student performance and self-assessment skills

    NARCIS (Netherlands)

    Fastré, Greet; Van der Klink, Marcel; Van Merriënboer, Jeroen

    2010-01-01

    Fastré, G. M. J., Van der Klink, M. R., & Van Merriënboer, J. J. G. (2010). The effects of performance-based assessment criteria on student performance and self-assessment skills. Advances in Health Science Education, 15(4), 517-532.

  5. The effects of performance-based assessment criteria on student performance and self-assessment skills

    NARCIS (Netherlands)

    Fastré, Greet; Van der Klink, Marcel; Van Merriënboer, Jeroen

    2010-01-01

    Fastré, G. M. J., Van der Klink, M. R., & Van Merriënboer, J. J. G. (2010). The effects of performance-based assessment criteria on student performance and self-assessment skills. Advances in Health Science Education, 15(4), 517-532.

  6. Assessing Low-Intensity Relationships in Complex Networks

    Science.gov (United States)

    Spitz, Andreas; Gimmler, Anna; Stoeck, Thorsten; Zweig, Katharina Anna; Horvát, Emőke-Ágnes

    2016-01-01

    Many large network data sets are noisy and contain links representing low-intensity relationships that are difficult to differentiate from random interactions. This is especially relevant for high-throughput data from systems biology, large-scale ecological data, but also for Web 2.0 data on human interactions. In these networks with missing and spurious links, it is possible to refine the data based on the principle of structural similarity, which assesses the shared neighborhood of two nodes. By using similarity measures to globally rank all possible links and choosing the top-ranked pairs, true links can be validated, missing links inferred, and spurious observations removed. While many similarity measures have been proposed to this end, there is no general consensus on which one to use. In this article, we first contribute a set of benchmarks for complex networks from three different settings (e-commerce, systems biology, and social networks) and thus enable a quantitative performance analysis of classic node similarity measures. Based on this, we then propose a new methodology for link assessment called z* that assesses the statistical significance of the number of their common neighbors by comparison with the expected value in a suitably chosen random graph model and which is a consistently top-performing algorithm for all benchmarks. In addition to a global ranking of links, we also use this method to identify the most similar neighbors of each single node in a local ranking, thereby showing the versatility of the method in two distinct scenarios and augmenting its applicability. Finally, we perform an exploratory analysis on an oceanographic plankton data set and find that the distribution of microbes follows similar biogeographic rules as those of macroorganisms, a result that rejects the global dispersal hypothesis for microbes. PMID:27096435

  7. Assessing Low-Intensity Relationships in Complex Networks.

    Science.gov (United States)

    Spitz, Andreas; Gimmler, Anna; Stoeck, Thorsten; Zweig, Katharina Anna; Horvát, Emőke-Ágnes

    2016-01-01

    Many large network data sets are noisy and contain links representing low-intensity relationships that are difficult to differentiate from random interactions. This is especially relevant for high-throughput data from systems biology, large-scale ecological data, but also for Web 2.0 data on human interactions. In these networks with missing and spurious links, it is possible to refine the data based on the principle of structural similarity, which assesses the shared neighborhood of two nodes. By using similarity measures to globally rank all possible links and choosing the top-ranked pairs, true links can be validated, missing links inferred, and spurious observations removed. While many similarity measures have been proposed to this end, there is no general consensus on which one to use. In this article, we first contribute a set of benchmarks for complex networks from three different settings (e-commerce, systems biology, and social networks) and thus enable a quantitative performance analysis of classic node similarity measures. Based on this, we then propose a new methodology for link assessment called z* that assesses the statistical significance of the number of their common neighbors by comparison with the expected value in a suitably chosen random graph model and which is a consistently top-performing algorithm for all benchmarks. In addition to a global ranking of links, we also use this method to identify the most similar neighbors of each single node in a local ranking, thereby showing the versatility of the method in two distinct scenarios and augmenting its applicability. Finally, we perform an exploratory analysis on an oceanographic plankton data set and find that the distribution of microbes follows similar biogeographic rules as those of macroorganisms, a result that rejects the global dispersal hypothesis for microbes.

  8. Assessing writing ability in primary education: on the evaluation of text quality and text complexity

    NARCIS (Netherlands)

    Feenstra, Hiske Marianne

    2014-01-01

    Writing is a complex ability, and measuring writing ability is a notoriously complex task. The assessment of writing ability is complicated by the multi-faceted nature of this productive language ability on one hand, and the difficulty of evaluating writing performances on the other hand. In this di

  9. Assessing writing ability in primary education: on the evaluation of text quality and text complexity

    NARCIS (Netherlands)

    Feenstra, Hiske

    2014-01-01

    Writing is a complex ability, and measuring writing ability is a notoriously complex task. The assessment of writing ability is complicated by the multi-faceted nature of this productive language ability on one hand, and the difficulty of evaluating writing performances on the other hand. In this

  10. Assessing the impact of new technology on complex sociotechnical systems

    CSIR Research Space (South Africa)

    Oosthuizen, R

    2016-08-01

    Full Text Available African Journal of Industrial Engineering Month Year Vol __(_) pp 1-3 ASSESSING THE IMPACT OF NEW TECHNOLOGY ON COMPLEX SOCIOTECHNICAL SYSTEMS R. Oosthuizen & L. Pretorius Department of Engineering and Technology Management University of Pretoria...

  11. Integration of classroom science performance assessment tasks by participants of the Wisconsin Performance Assessment Development Project (WPADP)

    Science.gov (United States)

    Tonnis, Dorothy Ann

    The goals of this interpretive study were to examine selected Wisconsin science teachers' perceptions of teaching and learning science, to describe the scope of classroom performance assessment practices, and to gain an understanding of teachers' personal and professional experiences that influenced their belief systems of teaching, learning and assessment. The study was designed to answer the research questions: (1) How does the integration of performance assessment relate to the teachers' views of teaching and learning? (2) How are the selected teachers integrating performance assessment in their teaching? (3) What past personal and professional experiences have influenced teachers' attitudes and beliefs related to their classroom performance assessment practices? Purposeful sampling was used to select seven Wisconsin elementary, middle and high school science teachers who participated in the WPADP initiative from 1993-1995. Data collection methods included a Teaching Practices Inventory (TPI), semi-structured interviews, teacher developed portfolios, portfolio conferences, and classroom observations. Four themes and multiple categories emerged through data analysis to answer the research questions and to describe the results. Several conclusions were drawn from this research. First, science teachers who appeared to effectively integrate performance assessment, demonstrated transformational thinking in their attitudes and beliefs about teaching and learning science. In addition, these teachers viewed assessment and instructional practices as interdependent. Third, transformational teachers generally used well defined criteria to judge student work and made it public to the students. Transformational teachers provided students with real-world performance assessment tasks that were also learning events. Furthermore, student task responses informed the transformational teachers about effectiveness of instruction, students' complex thinking skills, quality of

  12. PERFORMANCE ASSESSMENT IN OPERATING DRY PORTS

    Directory of Open Access Journals (Sweden)

    Ciortescu Cezar-Gabriel

    2010-12-01

    Full Text Available In this paper, an approach for recognizing and defining correct and operable performance will be presented with the purpose of evaluating the effectiveness and efficiency of processes in dry ports (inland intermodal hubs. The challenge in evaluating the possible improvements of the underlying processes lies in the special nature and the complex structure of dry ports. It is important to consider that all the processes are highly interconnected and that changes in parameters in one process also have an impact on parameters in other processes. Furthermore, the performance of dry ports, seen as the backbone of the system, has a significant impact on the overall performance of the whole transportation network.

  13. Managing complex systems: performance management in public health.

    Science.gov (United States)

    Landrum, Laura B; Baker, Stacy L

    2004-01-01

    The complexity of mobilizing and managing systems-wide public health responses has prompted Turning Point's Performance Management National Excellence Collaborative, funded by the Robert Wood Johnson Foundation, to develop a conceptual framework for performance management in public health. The framework has four integrated parts: (1) performance standards, (2) performance measures, (3) reporting of progress, and (4) a quality improvement process. The Collaborative based its framework on evidence gathered through a survey of current state performance management practices, a literature review, and its investigation of current practice models. This balanced and cohesive management model can be constructively used by public health programs, organizations, and community and state public health systems.

  14. Complex Assessment of Sufficiency of the Bank Resource Potential

    Directory of Open Access Journals (Sweden)

    Azizova Kateryna M.

    2014-01-01

    Full Text Available The goal of the article is development of methodical recommendations regarding assessment of sufficiency of the bank resource potential by means of identification and analysis of all its components and use of the method of rating assessment. Analysing, systemising and generalising scientific works of foreign and Ukrainian scientists, the article considers a complex approach to the bank resource potential management. In the result of the study the article identifies specific features of a complex approach in the bank resource potential management. The method of geometric average and normative values of selected ratios for calculation was used for the generalising complex assessment of sufficiency of the bank resource potential. The rating assessment of the Public JSC Mercury Bank resource potential was calculated by such indicators as: debt, loan and own resources. The stated algorithm of the rating assessment of the resource potential could be applied for comparison of banks in dynamics.

  15. Computational Tools to Assess Turbine Biological Performance

    Energy Technology Data Exchange (ETDEWEB)

    Richmond, Marshall C.; Serkowski, John A.; Rakowski, Cynthia L.; Strickler, Brad; Weisbeck, Molly; Dotson, Curtis L.

    2014-07-24

    Public Utility District No. 2 of Grant County (GCPUD) operates the Priest Rapids Dam (PRD), a hydroelectric facility on the Columbia River in Washington State. The dam contains 10 Kaplan-type turbine units that are now more than 50 years old. Plans are underway to refit these aging turbines with new runners. The Columbia River at PRD is a migratory pathway for several species of juvenile and adult salmonids, so passage of fish through the dam is a major consideration when upgrading the turbines. In this paper, a method for turbine biological performance assessment (BioPA) is demonstrated. Using this method, a suite of biological performance indicators is computed based on simulated data from a CFD model of a proposed turbine design. Each performance indicator is a measure of the probability of exposure to a certain dose of an injury mechanism. Using known relationships between the dose of an injury mechanism and frequency of injury (dose–response) from laboratory or field studies, the likelihood of fish injury for a turbine design can be computed from the performance indicator. By comparing the values of the indicators from proposed designs, the engineer can identify the more-promising alternatives. We present an application of the BioPA method for baseline risk assessment calculations for the existing Kaplan turbines at PRD that will be used as the minimum biological performance that a proposed new design must achieve.

  16. Assessing Students – Clinical Competence Versus Performance

    Directory of Open Access Journals (Sweden)

    John Ruedy

    2007-06-01

    Full Text Available The recent elaboration of the range of physiciancompetencies upon which the quality of health care isdependent has fostered the development of a variety ofmethods of assessing medical student competencies andperformance. Such assessments are essential inproviding feedback to students to guide their learningand to faculty on the success of the curriculum inachieving competency outcomes. In addition theyprovide evidence that students have achieved minimumrequirements for progressing. Well-designed ObservedStructured Clinical Examinations (OSCEs, MiniClinical Examinations (Mini-CEXs and some forms ofMulti-Source Feedback (MSF can meet acceptablestandards of validity and reliability and are feasible.Competency assessments are limited in predicting howa student will actually act in the work situationparticularly in humanistic skills. More emphasis needsto be placed on student performance, in suchcompetencies as communication and professionalism, ina variety of settings by a number of observers.

  17. Mass Casualty Triage Performance Assessment Tool

    Science.gov (United States)

    2015-02-01

    tactical tasks for which Soldiers are supposed to be trained to complete and the lack of more precise measurement tools, one key gap identified for...between the wound and the heart) and elevate the wound above the level of the heart to slow the flow of blood to the wound. • Apply a clean...TERMS Assessment, Triage, Performance measurement , Feedback, Tasks-Collective, Brigade Combat Teams, Task analysis

  18. Geochemical data requirements for performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Savage, D.; Stenhouse, M.J.

    1997-08-15

    This report reviews the geochemical data requirements and their application to the assessment of the performance of a geologic repository for radioactive wastes. It is concluded that information must be acquired on pH, redox reactions, inorganic and organic ligands in groundwater and colloids and processes such as precipitation, adsorption and diffusion and palaeohydrogeologic information in order to predict present hydrogeologic properties of potential repository sites. (UK).

  19. Assessing effort: differentiating performance and symptom validity.

    Science.gov (United States)

    Van Dyke, Sarah A; Millis, Scott R; Axelrod, Bradley N; Hanks, Robin A

    2013-01-01

    The current study aimed to clarify the relationship among the constructs involved in neuropsychological assessment, including cognitive performance, symptom self-report, performance validity, and symptom validity. Participants consisted of 120 consecutively evaluated individuals from a veteran's hospital with mixed referral sources. Measures included the Wechsler Adult Intelligence Scale-Fourth Edition Full Scale IQ (WAIS-IV FSIQ), California Verbal Learning Test-Second Edition (CVLT-II), Trail Making Test Part B (TMT-B), Test of Memory Malingering (TOMM), Medical Symptom Validity Test (MSVT), WAIS-IV Reliable Digit Span (RDS), Post-traumatic Check List-Military Version (PCL-M), MMPI-2 F scale, MMPI-2 Symptom Validity Scale (FBS), MMPI-2 Response Bias Scale (RBS), and the Postconcussive Symptom Questionnaire (PCSQ). Six different models were tested using confirmatory factor analysis (CFA) to determine the factor model describing the relationships between cognitive performance, symptom self-report, performance validity, and symptom validity. The strongest and most parsimonious model was a three-factor model in which cognitive performance, performance validity, and self-reported symptoms (including both standard and symptom validity measures) were separate factors. The findings suggest failure in one validity domain does not necessarily invalidate the other domain. Thus, performance validity and symptom validity should be evaluated separately.

  20. Structuring and assessing large and complex decision problems using MCDA

    DEFF Research Database (Denmark)

    Barfod, Michael Bruhn

    This paper presents an approach for the structuring and assessing of large and complex decision problems using multi-criteria decision analysis (MCDA). The MCDA problem is structured in a decision tree and assessed using the REMBRANDT technique featuring a procedure for limiting the number of pair...

  1. Assessing performance of Guilan university hospitals (2012

    Directory of Open Access Journals (Sweden)

    M. Alijanzadeh

    2016-08-01

    Full Text Available Background: Performance assessment could provide information to control and monitor of the current status and activities in hospitals. Objective: To assess the performance of hospitals affiliated with Guilan University of Medical Sciences in 2012. Methods: This cross-sectional study covered all the 22 public hospitals in the Guilan province, with 3760 registered beds. Using standard data-gathering form, verified by the Iranian Ministry of Health, performance indicators of 22 hospitals were recorded from the Statistical Services Center at Guilan University of Medical Sciences. Bed Occupancy Rate, Average Length of Stay and Bed Turnover Ratio were calculated and Pabon Lasso chart was drawn using SPSS statistics 17.0. Findings: On average, the Bed Turnover Ratio (time/year, Bed Occupancy Rate (% and Average Length of Stay (day were 78 times per year, 60% and 3.70 days, respectively. Based on the Pabon Lasso chart, 27 percentage hospitals were located in zone 1, 23 percentage hospitals in zone 2, 36 percentage hospitals in zone 3 and 14 percentage hospitals in zone 4. Conclusion: The performance of the hospitals was in a moderate level.

  2. Technical Basis for Assessing Uranium Bioremediation Performance

    Energy Technology Data Exchange (ETDEWEB)

    PE Long; SB Yabusaki; PD Meyer; CJ Murray; AL N’Guessan

    2008-04-01

    In situ bioremediation of uranium holds significant promise for effective stabilization of U(VI) from groundwater at reduced cost compared to conventional pump and treat. This promise is unlikely to be realized unless researchers and practitioners successfully predict and demonstrate the long-term effectiveness of uranium bioremediation protocols. Field research to date has focused on both proof of principle and a mechanistic level of understanding. Current practice typically involves an engineering approach using proprietary amendments that focuses mainly on monitoring U(VI) concentration for a limited time period. Given the complexity of uranium biogeochemistry and uranium secondary minerals, and the lack of documented case studies, a systematic monitoring approach using multiple performance indicators is needed. This document provides an overview of uranium bioremediation, summarizes design considerations, and identifies and prioritizes field performance indicators for the application of uranium bioremediation. The performance indicators provided as part of this document are based on current biogeochemical understanding of uranium and will enable practitioners to monitor the performance of their system and make a strong case to clients, regulators, and the public that the future performance of the system can be assured and changes in performance addressed as needed. The performance indicators established by this document and the information gained by using these indicators do add to the cost of uranium bioremediation. However, they are vital to the long-term success of the application of uranium bioremediation and provide a significant assurance that regulatory goals will be met. The document also emphasizes the need for systematic development of key information from bench scale tests and pilot scales tests prior to full-scale implementation.

  3. ASSESSING UNIVERSITY RESEARCH PERFORMANCE WITH MULTIPLE CONSTITUENCIES

    Directory of Open Access Journals (Sweden)

    Kuang-Liang Liu

    2012-12-01

    Full Text Available The research performance of the university is critical to the national competitiveness. Previous research has established that research performance is based on scholarly publishing. Several studies suggested that journal ranking is the important research quality indicator. However, unilateral measurement for the research performance will seriously corrode the development of university research work. Assessing university research performance with multiple constituencies is a better to enhance the university research. Although substantial studies have been performed on the critical factors that affect knowledge exploration in the university, those in knowledge exploitation are still lacking. With the multiple constituencies, a fully understanding of research performance can be gained. In the research model, knowledge exploration represents the academic research and knowledge exploitation represents the university–industry collaboration. Data collected from 124 university data in online database. The study shows that knowledge exploration and exploitation both are significant positive predictors of university competitiveness. University resources play important roles to affect both knowledge exploration and exploitation in the university. The study also shows that higher knowledge exploration will enhance knowledge exploitation. Implications for theory and practice and suggestions for future research are discussed.

  4. Test Item Linguistic Complexity and Assessments for Deaf Students

    Science.gov (United States)

    Cawthon, Stephanie

    2011-01-01

    Linguistic complexity of test items is one test format element that has been studied in the context of struggling readers and their participation in paper-and-pencil tests. The present article presents findings from an exploratory study on the potential relationship between linguistic complexity and test performance for deaf readers. A total of 64…

  5. Test Item Linguistic Complexity and Assessments for Deaf Students

    Science.gov (United States)

    Cawthon, Stephanie

    2011-01-01

    Linguistic complexity of test items is one test format element that has been studied in the context of struggling readers and their participation in paper-and-pencil tests. The present article presents findings from an exploratory study on the potential relationship between linguistic complexity and test performance for deaf readers. A total of 64…

  6. Hospital evacuation; planning, assessment, performance and evaluation

    Institute of Scientific and Technical Information of China (English)

    Wabo Nero C; Örtenwall P; Khorram-Manesh A

    2012-01-01

    Objective: Malfunction in hospitals´ complex internal systems, or extern threats, may result in a hospital evacuation. Factors contributing to such evacuation must be identified, analyzed and action plans should be prepared. Our aims in this study were 1) to evaluate the use of risk and vulnerability analysis as a basis for hospital evacuation plan, 2) to identify risks/hazards triggering an evacuation and evaluate the respond needed and 3) to propose a template with main key points for planning, performance and evaluation of such evacuation. Methods: A risk and vulnerability analysis at two county hospitals along with a systematic online literature search based on the following keywords; “evacuation/closure”, “hospitals/medical facilities” and“disaster/hazards” alone or with “planning”, was conducted. Results: We found that although all hospitals have a disaster plan, there is a lack of knowledge and appropriate instruments to plan, perform and evaluate a hospital evacuation. Risk and vulnerability analysis can be used to reveal threats leading to an evacuation (e.g. on-going climate changes and terror actions). These key points can later be used to plan, perform and evaluate such evacuation. Conclusion: There is a need for an elaborated evacuation planning for hospitals. An evacuation plan should continuously be drilled based on a risk and vulnerability analysis. A general guide can be used as foundation to plan, perform and evaluate such plan.

  7. Complexity theory and geographies of health: a critical assessment.

    Science.gov (United States)

    Gatrell, Anthony C

    2005-06-01

    The interest of social scientists in complexity theory has developed rapidly in recent years. Here, I consider briefly the primary characteristics of complexity theory, with particular emphasis given to relations and networks, non-linearity, emergence, and hybrids. I assess the 'added value' compared with other, existing perspectives that emphasise relationality and connectedness. I also consider the philosophical underpinnings of complexity theory and its reliance on metaphor. As a vehicle for moving away from reductionist accounts, complexity theory potentially has much to say to those interested in research on health inequalities, spatial diffusion, emerging and resurgent infections, and risk. These and other applications in health geography that have invoked complexity theory are examined in the paper. Finally, I consider some of the missing elements in complexity theory and argue that while it is refreshing to see a fruitful line of theoretical debate in health geography, we need good empirical work to illuminate it.

  8. Improved expressions for performance parameters for complex filters.

    Science.gov (United States)

    Sheppard, Colin J R; Ledesma, Silvia; Campos, Juan; Escalera, Juan C

    2007-06-15

    Improved expressions are given for the performance parameters for transverse and axial gains for complex pupil filters. These expressions can be used to predict the behavior of filters that give a small axial shift in the focal intensity maximum and also predict the changes in gain for different observation planes.

  9. Modeling Cognitive Strategies during Complex Task Performing Process

    Science.gov (United States)

    Mazman, Sacide Guzin; Altun, Arif

    2012-01-01

    The purpose of this study is to examine individuals' computer based complex task performing processes and strategies in order to determine the reasons of failure by cognitive task analysis method and cued retrospective think aloud with eye movement data. Study group was five senior students from Computer Education and Instructional Technologies…

  10. Embedded performance validity testing in neuropsychological assessment: Potential clinical tools.

    Science.gov (United States)

    Rickards, Tyler A; Cranston, Christopher C; Touradji, Pegah; Bechtold, Kathleen T

    2017-01-31

    The article aims to suggest clinically-useful tools in neuropsychological assessment for efficient use of embedded measures of performance validity. To accomplish this, we integrated available validity-related and statistical research from the literature, consensus statements, and survey-based data from practicing neuropsychologists. We provide recommendations for use of 1) Cutoffs for embedded performance validity tests including Reliable Digit Span, California Verbal Learning Test (Second Edition) Forced Choice Recognition, Rey-Osterrieth Complex Figure Test Combination Score, Wisconsin Card Sorting Test Failure to Maintain Set, and the Finger Tapping Test; 2) Selecting number of performance validity measures to administer in an assessment; and 3) Hypothetical clinical decision-making models for use of performance validity testing in a neuropsychological assessment collectively considering behavior, patient reporting, and data indicating invalid or noncredible performance. Performance validity testing helps inform the clinician about an individual's general approach to tasks: response to failure, task engagement and persistence, compliance with task demands. Data-driven clinical suggestions provide a resource to clinicians and to instigate conversation within the field to make more uniform, testable decisions to further the discussion, and guide future research in this area.

  11. Guidance for performing preliminary assessments under CERCLA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-09-01

    EPA headquarters and a national site assessment workgroup produced this guidance for Regional, State, and contractor staff who manage or perform preliminary assessments (PAs). EPA has focused this guidance on the types of sites and site conditions most commonly encountered. The PA approach described in this guidance is generally applicable to a wide variety of sites. However, because of the variability among sites, the amount of information available, and the level of investigative effort required, it is not possible to provide guidance that is equally applicable to all sites. PA investigators should recognize this and be aware that variation from this guidance may be necessary for some sites, particularly for PAs performed at Federal facilities, PAs conducted under EPA`s Environmental Priorities Initiative (EPI), and PAs at sites that have previously been extensively investigated by EPA or others. The purpose of this guidance is to provide instructions for conducting a PA and reporting results. This guidance discusses the information required to evaluate a site and how to obtain it, how to score a site, and reporting requirements. This document also provides guidelines and instruction on PA evaluation, scoring, and the use of standard PA scoresheets. The overall goal of this guidance is to assist PA investigators in conducting high-quality assessments that result in correct site screening or further action recommendations on a nationally consistent basis.

  12. Comparative performance assessment of switching options

    Science.gov (United States)

    Vukovic, Alex; Savoie, Michel J.

    2004-11-01

    Switching is one of the key functionalities in next generation optical networks. It might be performed by either an optical switch (optical-electrical-optical, or OEO) or a "purely" photonic switch (optical-optical-optical or OOO). Both switches are analyzed from two perspectives - as an individual network element, and as an integral part within the communication network. As an individual network element, the performance evaluation of the two switch types is based on the individual assessment of switch footprint and power dissipation, bandwidth utilization, scalability to high speed, transparency, interoperability, technology maturity and ability to manipulate data. Although both switch types have their own advantages as a network element, the full judgement of their role in next generation optical networks requires an overall network perspective. From that viewpoint, network functionalities such as grooming capabilities, scalability, traffic management, protection, line equalization and performance monitoring are those taken into account for comparative analyses to gain an understanding of the impacts of switch choice in the network. As a result of the comparative performance assessment, the merits and benefits of both switch types in actual network applications are analyzed and outlined. Although the paper evaluates some criteria for switch choice in a network, it points out potential technologies or techniques critical to next generation architectural solutions and protocols as well as the challenges to bridge the gap towards implementing flexible, cost-effective and dynamically provisioned networks of the future. Finally, the paper responds to one critical question - What is the expected role of each switch type in next generation applications and services?

  13. Research and assessment of competitiveness of large engineering complexes

    Directory of Open Access Journals (Sweden)

    Krivorotov V.V.

    2017-01-01

    Full Text Available The urgency of the problem of ensuring the competitiveness of manufacturing and high-tech sectors is shown. Substantiated the decisive role of the large industrial complexes in the formation of the results of the national economy; the author’s interpretation of the concept of “industrial complex” with regard to current economic systems. Current approaches to assessing the competitiveness of enterprises and industrial complexes are analyzed; showing their main advantages and disadvantages. Provides scientific-methodological approach to the study and management of competitiveness of a large industrial complex; the description of its main units is provided. As a Central element of the scientific methodology approach proposed the methodology for assessing the competitiveness of a large industrial complex based on the Pattern-method; a modular system of indicators of competitiveness is developed and its adaptation to a large engineering complexes is made. Using the developed methodology the competitiveness of one of the largest engineering complexes of the group of companies Uralelectrotyazhmash, which is the leading enterprises in electrotechnical industry of Russia is assessed. The evaluation identified the main problems and bottlenecks in the development of these enterprises, and their comparison with leading competitors is provided. According to the results of the study the main conclusions and recommendations are formed.

  14. Vocal Assessment Before, After, and the Day After Opera Performance.

    Science.gov (United States)

    McHenry, Monica; Evans, Joseph; Powitzky, Eric

    2016-03-01

    To explore aerodynamic, acoustic, and laryngeal changes surrounding opera performance. Prospective preperformance, postperformance, and day after performance. The laryngeal and vocal function of five male and five female classically trained singers was assessed immediately before, immediately after, and 1 day after an actual operatic performance. Phonatory threshold pressure was obtained. In addition, during a full-voice singing task, aerodynamic and acoustic measures included estimated subglottal pressure, airflow during voicing, laryngeal resistance, and sound pressure level (SPL). Expert listeners in the audience judged performers' voice quality at the beginning and the end of the performance. Laryngeal visualization was performed immediately before performance and the day after performance. Laryngeal stroboscopy revealed allergy symptoms with no change in vocal fold edges for all men. Women were less impacted by allergies. For all singers, perceptual judgments of expert listeners in the audience corresponded well with laryngeal findings. The men whose voices were perceived to be balanced and strong across the performance demonstrated increased airflow and reduced laryngeal resistance after performance. The two women who did not sing in church the morning after the performance demonstrated increased airflow and reduced laryngeal resistance. The two men who did sing in church the morning after the performance demonstrated noticeably reduced SPL and increased laryngeal resistance the day after performance. It appears most useful to describe the complexity of vocal performance with a variety of acoustic, aerodynamic, and perceptual measures. The findings further suggest that vocal rest the day after performance may facilitate recovery. Copyright © 2016 The Voice Foundation. Published by Elsevier Inc. All rights reserved.

  15. Visual availability, balance performance and movement complexity in dancers.

    Science.gov (United States)

    Muelas Pérez, Ruth; Sabido Solana, Rafael; Barbado Murillo, David; Moreno Hernández, Francisco Javier

    2014-09-01

    Research regarding the complex fluctuations of postural sway in an upright standing posture has yielded controversial results about the relationship between complexity and the capacity of the system to generate adaptive responses. The aim of this study is to compare the performance and complexity of two groups with different levels of expertise in postural control during a balance task. We examined the balance ability and time varying (dynamic) characteristics in a group of 18 contemporary dancers and 30 non-dancers in different visual conditions. The task involved maintaining balance for 30s on a stability platform with opened or closed eyes. The results showed that dancers exhibited greater balance ability only in open eyes task than non-dancers. We also observed a lower performance in both groups during the test with closed eyes, but only dancers reduced their complexity in closed eyes task. The main conclusion is that the greater postural control exhibited by dancers depends on the availability of visual information. Copyright © 2014 Elsevier B.V. All rights reserved.

  16. Performance-based assessment of reconstructed images

    Energy Technology Data Exchange (ETDEWEB)

    Hanson, Kenneth [Los Alamos National Laboratory

    2009-01-01

    During the early 90s, I engaged in a productive and enjoyable collaboration with Robert Wagner and his colleague, Kyle Myers. We explored the ramifications of the principle that tbe quality of an image should be assessed on the basis of how well it facilitates the performance of appropriate visual tasks. We applied this principle to algorithms used to reconstruct scenes from incomplete and/or noisy projection data. For binary visual tasks, we used both the conventional disk detection and a new challenging task, inspired by the Rayleigh resolution criterion, of deciding whether an object was a blurred version of two dots or a bar. The results of human and machine observer tests were summarized with the detectability index based on the area under the ROC curve. We investigated a variety of reconstruction algorithms, including ART, with and without a nonnegativity constraint, and the MEMSYS3 algorithm. We concluded that the performance of the Raleigh task was optimized when the strength of the prior was near MEMSYS's default 'classic' value for both human and machine observers. A notable result was that the most-often-used metric of rms error in the reconstruction was not necessarily indicative of the value of a reconstructed image for the purpose of performing visual tasks.

  17. Cooperative decoding in femtocell networks: Performance-complexity tradeoff

    KAUST Repository

    Benkhelifa, Fatma

    2012-06-01

    Femtocells, which are low cost low power, stand alone cellular access points, are a potential solution to provide good indoor coverage with high data rate. However, the femtocell deployment may also increase the co-channel interference (CCI) by reducing the distance reuse of the spectrum. In this paper, we introduce methods to cancel out the interference among the femtocells while considering that macrocells operate orthogonally to the femtocells. The femtocells may also cooperate through joint detection of the received signal and improve the overall error performance at the expense of an increased computational complexity. In this paper, the performance-complexity tradeoff of cooperative detection is investigated for uplink transmissions. Numerical results show that the cooperative detection gain may reach 10 dB at a Bit-Error Rate (BER) of 10 -2 when compared to the case without cooperation. © 2012 IEEE.

  18. Assessment of Complex Cognition: Commentary on the Design and Validation of Assessments

    Science.gov (United States)

    Pellegrino, James W.; Wilson, Mark

    2015-01-01

    The seven articles in this special issue are concerned with the challenges of assessing complex aspects of cognition in the domains of mathematics, reading, history, and science. Each describes the design of assessments and their interpretive use, with a particular focus on assessments closely tied to classroom instruction. Individually and…

  19. Complexities and constraints influencing learner performance in physical science

    Directory of Open Access Journals (Sweden)

    Mavhungu Abel Mafukata

    2016-01-01

    Full Text Available This paper explores complexities and constraints affecting performance and output of physical science learners in Vhembe District, Limpopo Province, South Africa. The study was motivated by the desire of the researcher to establish, profile and characterise the complexities and constraints reminiscence of poor performance of learners in physical science as measured through end-of-year Grade 12 (final year of high school education examination results. Twenty six schools (n=26 were purposively selected from three circuits of education (n=3. From these schools, two learners were randomly selected (n=52 for interviews. In addition, two circuit managers (n=2 were conveniently selected as part of Key Informant Interviews (KII. For the Focus Group Discussions (FGDs, twelve (n=12 parents were randomly selected to form two groups of six members each. Multi-factor complexities and constraints impeding performance of learners were discovered. Intensive teacher in-service programme is recommended. Community engagement should be encouraged to educate parents on the value of involvement in the education of their children. Free access learner support structures such as Homework and Extra-lessons Assistance Centre (H&EACs should be established.

  20. Including Performance Assessments in Accountability Systems: A Review of Scale-Up Efforts

    Science.gov (United States)

    Tung, Rosann

    2010-01-01

    The purpose of this literature and field review is to understand previous efforts at scaling up performance assessments for use across districts and states. Performance assessments benefit students and teachers by providing more opportunities for students to demonstrate their knowledge and complex skills, by providing teachers with better…

  1. Complex Moving Parts: Assessment Systems and Electronic Portfolios

    Science.gov (United States)

    Larkin, Martha J.; Robertson, Royce L.

    2013-01-01

    The largest college within an online university of over 50,000 students invested significant resources in translating a complex assessment system focused on continuous improvement and national accreditation into an effective and efficient electronic portfolio (ePortfolio). The team building the system needed a model to address problems met…

  2. Performing Probabilistic Risk Assessment Through RAVEN

    Energy Technology Data Exchange (ETDEWEB)

    A. Alfonsi; C. Rabiti; D. Mandelli; J. Cogliati; R. Kinoshita

    2013-06-01

    The Reactor Analysis and Virtual control ENviroment (RAVEN) code is a software tool that acts as the control logic driver and post-processing engine for the newly developed Thermal-Hydraulic code RELAP-7. RAVEN is now a multi-purpose Probabilistic Risk Assessment (PRA) software framework that allows dispatching different functionalities: Derive and actuate the control logic required to simulate the plant control system and operator actions (guided procedures), allowing on-line monitoring/controlling in the Phase Space Perform both Monte-Carlo sampling of random distributed events and Dynamic Event Tree based analysis Facilitate the input/output handling through a Graphical User Interface (GUI) and a post-processing data mining module

  3. Complexity Variability Assessment of Nonlinear Time-Varying Cardiovascular Control

    Science.gov (United States)

    Valenza, Gaetano; Citi, Luca; Garcia, Ronald G.; Taylor, Jessica Noggle; Toschi, Nicola; Barbieri, Riccardo

    2017-01-01

    The application of complex systems theory to physiology and medicine has provided meaningful information about the nonlinear aspects underlying the dynamics of a wide range of biological processes and their disease-related aberrations. However, no studies have investigated whether meaningful information can be extracted by quantifying second-order moments of time-varying cardiovascular complexity. To this extent, we introduce a novel mathematical framework termed complexity variability, in which the variance of instantaneous Lyapunov spectra estimated over time serves as a reference quantifier. We apply the proposed methodology to four exemplary studies involving disorders which stem from cardiology, neurology and psychiatry: Congestive Heart Failure (CHF), Major Depression Disorder (MDD), Parkinson’s Disease (PD), and Post-Traumatic Stress Disorder (PTSD) patients with insomnia under a yoga training regime. We show that complexity assessments derived from simple time-averaging are not able to discern pathology-related changes in autonomic control, and we demonstrate that between-group differences in measures of complexity variability are consistent across pathologies. Pathological states such as CHF, MDD, and PD are associated with an increased complexity variability when compared to healthy controls, whereas wellbeing derived from yoga in PTSD is associated with lower time-variance of complexity. PMID:28218249

  4. Complexity Variability Assessment of Nonlinear Time-Varying Cardiovascular Control

    Science.gov (United States)

    Valenza, Gaetano; Citi, Luca; Garcia, Ronald G.; Taylor, Jessica Noggle; Toschi, Nicola; Barbieri, Riccardo

    2017-02-01

    The application of complex systems theory to physiology and medicine has provided meaningful information about the nonlinear aspects underlying the dynamics of a wide range of biological processes and their disease-related aberrations. However, no studies have investigated whether meaningful information can be extracted by quantifying second-order moments of time-varying cardiovascular complexity. To this extent, we introduce a novel mathematical framework termed complexity variability, in which the variance of instantaneous Lyapunov spectra estimated over time serves as a reference quantifier. We apply the proposed methodology to four exemplary studies involving disorders which stem from cardiology, neurology and psychiatry: Congestive Heart Failure (CHF), Major Depression Disorder (MDD), Parkinson’s Disease (PD), and Post-Traumatic Stress Disorder (PTSD) patients with insomnia under a yoga training regime. We show that complexity assessments derived from simple time-averaging are not able to discern pathology-related changes in autonomic control, and we demonstrate that between-group differences in measures of complexity variability are consistent across pathologies. Pathological states such as CHF, MDD, and PD are associated with an increased complexity variability when compared to healthy controls, whereas wellbeing derived from yoga in PTSD is associated with lower time-variance of complexity.

  5. E-Area Performance Assessment Interim Measures Assessment FY2005

    Energy Technology Data Exchange (ETDEWEB)

    Stallings, M

    2006-01-31

    After major changes to the limits for various disposal units of the E-Area Low Level Waste Facility (ELLWF) last year, no major changes have been made during FY2005. A Special Analysis was completed which removes the air pathway {sup 14}C limit from the Intermediate Level Vault (ILV). This analysis will allow the disposal of reactor moderator deionizers which previously had no pathway to disposal. Several studies have also been completed providing groundwater transport input for future special analyses. During the past year, since Slit Trenches No.1 and No.2 were nearing volumetric capacity, they were operationally closed under a preliminary closure analysis. This analysis was performed using as-disposed conditions and data and showed that concrete rubble from the demolition of 232-F was acceptable for disposal in the STs even though the latest special analysis for the STs had reduced the tritium limits so that the inventory in the rubble exceeded limits. A number of special studies are planned during the next years; perhaps the largest of these will be revision of the Performance Assessment (PA) for the ELLWF. The revision will be accomplished by incorporating special analyses performed since the last PA revision as well as revising analyses to include new data. Projected impacts on disposal limits of more recent studies have been estimated. No interim measures will be applied during this year. However, it is being recommended that tritium disposals to the Components-in-Grout (CIG) Trenches be suspended until a limited Special Analysis (SA) currently in progress is completed. This SA will give recommendations for optimum placement of tritiated D-Area tower waste. Further recommendations for tritiated waste placement in the CIG Trenches will be given in the upcoming PA revision.

  6. Assessing environmental performance by combining life cycle assessment, multi-criteria analysis and environmental performance indicators

    NARCIS (Netherlands)

    Hermann, B.G.; Kroeze, C.; Jawjit, W.

    2007-01-01

    We present a new analytical tool, called COMPLIMENT, which can be used to provide detailed information on the overall environmental impact of a business. COMPLIMENT integrates parts of tools such as life cycle assessment, multi-criteria analysis and environmental performance indicators. It avoids di

  7. Performance Evaluation of Complex Multiplier Using Advance Algorithm

    Directory of Open Access Journals (Sweden)

    Gopichand D. Khandale

    2013-06-01

    Full Text Available In this paper VHDL implementation of complex number multiplier using ancient Vedic mathematics and conventional modified Booth algorithm is presented and compared. The idea for designing the multiplier unit is adopted from ancient Indian mathematics "Vedas". The Urdhva Tiryakbhyam sutra (method was selected for implementation since it is applicable to all cases of multiplication. Multiplication using Urdhva Tiryakbhyam sutra is performed by vertically and crosswise. The feature of this method is any multi-bit multiplication can be reduced down to single bit multiplication and addition. On account of these formulas, the partial products and sums are generated in one step which reduces the carry propagation from LSB to MSB. The implementation of the Vedic mathematics and their application to the complex multiplier ensure substantial reduction of propagation delay. The simulation results for 4 bit multiplication using Booth’s algorithm and using Vedic sutra are illustrated.

  8. Overview of AVS-video: tools, performance and complexity

    Science.gov (United States)

    Yu, Lu; Yi, Feng; Dong, Jie; Zhang, Cixun

    2005-07-01

    Audio Video coding Standard (AVS) is established by the Working Group of China in the same name. AVS-video is an application driven coding standard. AVS Part 2 targets to high-definition digital video broadcasting and high-density storage media and AVS Part 7 targets to low complexity, low picture resolution mobility applications. Integer transform, intra and inter-picture prediction, in-loop deblocking filter and context-based two dimensional variable length coding are the major compression tools in AVS-video, which are well-tuned for target applications. It achieves similar performance to H.264/AVC with lower cost.

  9. The Assessment Context: Accreditation, Accountability, and Performance

    Science.gov (United States)

    Volkwein, J. Fredericks

    2010-01-01

    A diverse society has created a diverse education system, which in turn requires diverse and complex mechanisms of quality control. The diversity and complexity of the industrial, service, and knowledge-based economy, with its vast variety of occupations and dynamic labor markets, heavily influences the curricular structures and academic profiles…

  10. Circadian Effects on Simple Components of Complex Task Performance

    Science.gov (United States)

    Clegg, Benjamin A.; Wickens, Christopher D.; Vieane, Alex Z.; Gutzwiller, Robert S.; Sebok, Angelia L.

    2015-01-01

    The goal of this study was to advance understanding and prediction of the impact of circadian rhythm on aspects of complex task performance during unexpected automation failures, and subsequent fault management. Participants trained on two tasks: a process control simulation, featuring automated support; and a multi-tasking platform. Participants then completed one task in a very early morning (circadian night) session, and the other during a late afternoon (circadian day) session. Small effects of time of day were seen on simple components of task performance, but impacts on more demanding components, such as those that occur following an automation failure, were muted relative to previous studies where circadian rhythm was compounded with sleep deprivation and fatigue. Circadian low participants engaged in compensatory strategies, rather than passively monitoring the automation. The findings and implications are discussed in the context of a model that includes the effects of sleep and fatigue factors.

  11. Soft plasma electrolysis with complex ions for optimizing electrochemical performance

    Science.gov (United States)

    Kamil, Muhammad Prisla; Kaseem, Mosab; Ko, Young Gun

    2017-01-01

    Plasma electrolytic oxidation (PEO) was a promising surface treatment for light metals to tailor an oxide layer with excellent properties. However, porous coating structure was generally exhibited due to excessive plasma discharges, restraining its performance. The present work utilized ethylenediaminetetraacetic acid (EDTA) and Cu-EDTA complexing agents as electrolyte additives that alter the plasma discharges to improve the electrochemical properties of Al-1.1Mg alloy coated by PEO. To achieve this purpose, PEO coatings were fabricated under an alternating current in silicate electrolytes containing EDTA and Cu-EDTA. EDTA complexes were found to modify the plasma discharging behaviour during PEO that led to a lower porosity than that without additives. This was attributed to a more homogeneous electrical field throughout the PEO process while the coating growth would be maintained by an excess of dissolved Al due to the EDTA complexes. When Cu-EDTA was used, the number of discharge channels in the coating layer was lower than that with EDTA due to the incorporation of Cu2O and CuO altering the dielectric behaviour. Accordingly, the sample in the electrolyte containing Cu-EDTA constituted superior corrosion resistance to that with EDTA. The electrochemical mechanism for excellent corrosion protection was elucidated in the context of equivalent circuit model. PMID:28281672

  12. Soft plasma electrolysis with complex ions for optimizing electrochemical performance

    Science.gov (United States)

    Kamil, Muhammad Prisla; Kaseem, Mosab; Ko, Young Gun

    2017-03-01

    Plasma electrolytic oxidation (PEO) was a promising surface treatment for light metals to tailor an oxide layer with excellent properties. However, porous coating structure was generally exhibited due to excessive plasma discharges, restraining its performance. The present work utilized ethylenediaminetetraacetic acid (EDTA) and Cu-EDTA complexing agents as electrolyte additives that alter the plasma discharges to improve the electrochemical properties of Al-1.1Mg alloy coated by PEO. To achieve this purpose, PEO coatings were fabricated under an alternating current in silicate electrolytes containing EDTA and Cu-EDTA. EDTA complexes were found to modify the plasma discharging behaviour during PEO that led to a lower porosity than that without additives. This was attributed to a more homogeneous electrical field throughout the PEO process while the coating growth would be maintained by an excess of dissolved Al due to the EDTA complexes. When Cu-EDTA was used, the number of discharge channels in the coating layer was lower than that with EDTA due to the incorporation of Cu2O and CuO altering the dielectric behaviour. Accordingly, the sample in the electrolyte containing Cu-EDTA constituted superior corrosion resistance to that with EDTA. The electrochemical mechanism for excellent corrosion protection was elucidated in the context of equivalent circuit model.

  13. Social-Emotional Assessment, Performance, and Standards

    Science.gov (United States)

    McKown, Clark

    2017-01-01

    In the push to boost young people's social and emotional learning (SEL), assessment has lagged behind policy and practice. We have few usable, feasible, and scalable tools to assess children's SEL. And without good assessments, teachers, administrators, parents, and policymakers can't get the data they need to make informed decisions about SEL.…

  14. Proficiency and Linguistic Complexity Influence Speech Motor Control and Performance in Spanish Language Learners.

    Science.gov (United States)

    Nip, Ignatius S B; Blumenfeld, Henrike K

    2015-06-01

    Second-language (L2) production requires greater cognitive resources to inhibit the native language and to retrieve less robust lexical representations. The current investigation identifies how proficiency and linguistic complexity, specifically syntactic and lexical factors, influence speech motor control and performance. Speech movements of 29 native English speakers with low or high proficiency in Spanish were recorded while producing simple and syntactically complex sentences in English and Spanish. Sentences were loaded with cognate (e.g., baby-bebé) or noncognate (e.g., dog-perro) words. Effects of proficiency, lexicality (cognate vs. noncognate), and syntactic complexity on maximum speed, range of movement, duration, and speech movement variability were examined. In general, speakers with lower L2 proficiency differed in their speech motor control and performance from speakers with higher L2 proficiency. Speakers with higher L2 proficiency generally had less speech movement variability, shorter phrase durations, greater maximum speeds, and greater ranges of movement. In addition, lexicality and syntactic complexity affected speech motor control and performance. L2 proficiency, lexicality, and syntactic complexity influence speech motor control and performance in adult L2 learners. Information about relationships between speech motor control, language proficiency, and cognitive-linguistic demands may be used to assess and treat bilingual clients and language learners.

  15. Integrated modeling tool for performance engineering of complex computer systems

    Science.gov (United States)

    Wright, Gary; Ball, Duane; Hoyt, Susan; Steele, Oscar

    1989-01-01

    This report summarizes Advanced System Technologies' accomplishments on the Phase 2 SBIR contract NAS7-995. The technical objectives of the report are: (1) to develop an evaluation version of a graphical, integrated modeling language according to the specification resulting from the Phase 2 research; and (2) to determine the degree to which the language meets its objectives by evaluating ease of use, utility of two sets of performance predictions, and the power of the language constructs. The technical approach followed to meet these objectives was to design, develop, and test an evaluation prototype of a graphical, performance prediction tool. The utility of the prototype was then evaluated by applying it to a variety of test cases found in the literature and in AST case histories. Numerous models were constructed and successfully tested. The major conclusion of this Phase 2 SBIR research and development effort is that complex, real-time computer systems can be specified in a non-procedural manner using combinations of icons, windows, menus, and dialogs. Such a specification technique provides an interface that system designers and architects find natural and easy to use. In addition, PEDESTAL's multiview approach provides system engineers with the capability to perform the trade-offs necessary to produce a design that meets timing performance requirements. Sample system designs analyzed during the development effort showed that models could be constructed in a fraction of the time required by non-visual system design capture tools.

  16. A Methodology for Simulation-based Job Performance Assessment

    Science.gov (United States)

    2008-01-01

    Job performance measurement is of critical importance to any organization’s health. It is important not only to recognize and reward good performance...methodology for developing simulations for job performance assessment. We then describe a performance assessment simulation for Light-Wheeled Vehicle

  17. Assessing the Performance of Global Solar Radiation Empirical ...

    African Journals Online (AJOL)

    Assessing the Performance of Global Solar Radiation Empirical Models at a ... such as simulation of crop performance and the design of solar energy conversion ... Three of these statistical performance indicators were combined to generate ...

  18. Does Formative Assessment Improve Student Learning and Performance in Soil Science?

    Science.gov (United States)

    Kopittke, Peter M.; Wehr, J. Bernhard; Menzies, Neal W.

    2012-01-01

    Soil science students are required to apply knowledge from a range of disciplines to unfamiliar scenarios to solve complex problems. To encourage deep learning (with student performance an indicator of learning), a formative assessment exercise was introduced to a second-year soil science subject. For the formative assessment exercise, students…

  19. Performance assessment of PEFP steering magnet

    Energy Technology Data Exchange (ETDEWEB)

    Han, S. H.; Jeo, Y. S. [KAERI, Taejon (Korea, Republic of)

    2003-10-01

    PEFP LEBT uses two solenoid and two steering magnets for the beam position and angle control at the RFQ match point. The dependence of magnetic field and coil temperature on time was assessed and the linearity was also measured.

  20. Complex Hand Dexterity: A Review of Biomechanical Methods for Measuring Musical Performance

    Directory of Open Access Journals (Sweden)

    Cheryl Diane Metcalf

    2014-05-01

    Full Text Available Complex hand dexterity is fundamental to our interactions with the physical, social and cultural environment. Dexterity can be an expression of creativity and precision in a range of activities, including musical performance. Little is understood about complex hand dexterity or how virtuoso expertise is acquired, due to the versatility of movement combinations available to complete any given task. This has historically limited progress of the field because of difficulties in measuring movements of the hand. Recent developments in methods of motion capture and analysis mean it is now possible to explore the intricate movements of the hand and fingers. These methods allow us insights into the neurophysiological mechanisms underpinning complex hand dexterity and motor learning. They also allow investigation into the key factors that contribute to injury, recovery and functional compensation.The application of such analytical techniques within musical performance provides a multidisciplinary framework for purposeful investigation into the process of learning and skill acquisition in instrumental performance. These highly skilled manual and cognitive tasks present the ultimate achievement in complex hand dexterity. This paper will review methods of assessing instrumental performance in music, focusing specifically on biomechanical measurement and the associated technical challenges faced when measuring highly dexterous activities.

  1. A Control Variate Method for Probabilistic Performance Assessment. Improved Estimates for Mean Performance Quantities of Interest

    Energy Technology Data Exchange (ETDEWEB)

    MacKinnon, Robert J.; Kuhlman, Kristopher L

    2016-05-01

    We present a method of control variates for calculating improved estimates for mean performance quantities of interest, E(PQI) , computed from Monte Carlo probabilistic simulations. An example of a PQI is the concentration of a contaminant at a particular location in a problem domain computed from simulations of transport in porous media. To simplify the presentation, the method is described in the setting of a one- dimensional elliptical model problem involving a single uncertain parameter represented by a probability distribution. The approach can be easily implemented for more complex problems involving multiple uncertain parameters and in particular for application to probabilistic performance assessment of deep geologic nuclear waste repository systems. Numerical results indicate the method can produce estimates of E(PQI)having superior accuracy on coarser meshes and reduce the required number of simulations needed to achieve an acceptable estimate.

  2. Assessment in Performance-Based Secondary Music Classes

    Science.gov (United States)

    Pellegrino, Kristen; Conway, Colleen M.; Russell, Joshua A.

    2015-01-01

    After sharing research findings about grading and assessment practices in secondary music ensemble classes, we offer examples of commonly used assessment tools (ratings scale, checklist, rubric) for the performance ensemble. Then, we explore the various purposes of assessment in performance-based music courses: (1) to meet state, national, and…

  3. Effect of Engaging Trainees by Assessing Peer Performance

    DEFF Research Database (Denmark)

    Loumann Krogh, Charlotte; Ringsted, Charlotte; Kromann, Charles B;

    2014-01-01

    INTRODUCTION: The aim of this study was to explore the learning effect of engaging trainees by assessing peer performance during simulation-based training. METHODS: Eighty-four final year medical students participated in the study. The intervention involved trainees assessing peer performance...... performance did not show any significant difference between the two groups. Trainees who assessed peer performance were more satisfied with the training than those who did not: mean 6.36 (SD 1.00) versus 5.74 (SD 1.33) P = 0.025. CONCLUSION: Engaging trainees in the assessment of peer performance had...

  4. Multimedia-based performance assessment in Dutch vocational education

    NARCIS (Netherlands)

    de Klerk, Sebastiaan

    2016-01-01

    In this PhD thesis, a new method of assessment, which we have called Multimedia-based Performance Assessment (MBPA) is presented and studied in the context of Dutch vocational education. An MBPA is an assessment that incorporates multiple types of multimedia and is used to assess the skills that are

  5. Multimedia-based performance assessment in Dutch vocational education

    NARCIS (Netherlands)

    Klerk, de Sebastiaan

    2016-01-01

    In this PhD thesis, a new method of assessment, which we have called Multimedia-based Performance Assessment (MBPA) is presented and studied in the context of Dutch vocational education. An MBPA is an assessment that incorporates multiple types of multimedia and is used to assess the skills that are

  6. Assessing the Performance of Military Treatment Facilities

    Science.gov (United States)

    2011-01-01

    imperfect. When performance measures do not fully account for systematic factors , such as health risk or deployment of medical personnel, there can be...changing performance across MTFs. We also found that catastrophic cases, such as organ transplants and low - birthweight deliveries, play an outsized role...or low - birthweight deliveries) may contribute substantially to the variabil- Introduction 3 ity of average MTF outcomes, because these cases are

  7. A Measurement Concept for Assessing Corps Performance

    Science.gov (United States)

    1990-09-01

    develooment of objective cuestions used to assess subordinate under- standing of intent? 7. Does it appear to be feasible to interact with the exercise...factors must be identified. The answers to such cuestions will not be directly provided by the validation data. Instead, they will reauire careful

  8. Video Quality Assessment and Machine Learning: Performance and Interpretability

    DEFF Research Database (Denmark)

    Søgaard, Jacob; Forchhammer, Søren; Korhonen, Jari

    2015-01-01

    In this work we compare a simple and a complex Machine Learning (ML) method used for the purpose of Video Quality Assessment (VQA). The simple ML method chosen is the Elastic Net (EN), which is a regularized linear regression model and easier to interpret. The more complex method chosen is Support...

  9. Influence of step complexity and presentation style on step performance of computerized emergency operating procedures

    Energy Technology Data Exchange (ETDEWEB)

    Xu Song [Department of Industrial Engineering, Tsinghua University, Beijing 100084 (China); Li Zhizhong [Department of Industrial Engineering, Tsinghua University, Beijing 100084 (China)], E-mail: zzli@tsinghua.edu.cn; Song Fei; Luo Wei; Zhao Qianyi; Salvendy, Gavriel [Department of Industrial Engineering, Tsinghua University, Beijing 100084 (China)

    2009-02-15

    With the development of information technology, computerized emergency operating procedures (EOPs) are taking the place of paper-based ones. However, ergonomics issues of computerized EOPs have not been studied adequately since the industrial practice is quite limited yet. This study examined the influence of step complexity and presentation style of EOPs on step performance. A simulated computerized EOP system was developed in two presentation styles: Style A: one- and two-dimensional flowcharts combination; Style B: two-dimensional flowchart and success logic tree combination. Step complexity was quantified by a complexity measure model based on an entropy concept. Forty subjects participated in the experiment of EOP execution using the simulated system. The results of data analysis on the experiment data indicate that step complexity and presentation style could significantly influence step performance (both step error rate and operation time). Regression models were also developed. The regression analysis results imply that operation time of a step could be well predicted by step complexity while step error rate could only partly predicted by it. The result of a questionnaire investigation implies that step error rate was influenced not only by the operation task itself but also by other human factors. These findings may be useful for the design and assessment of computerized EOPs.

  10. Complex integrated method of improvement of sports ballroom dance performance

    Directory of Open Access Journals (Sweden)

    Omelyanenko V.I.

    2014-11-01

    Full Text Available Purpose: to elaborate complex integrated method of psychological influence upon sport ballroom dancers for their quick response to assumed mistakes by executing other steps in training mode in place of given compositions. Material: 20 senior sport ballroom dancers: 10 - experimental group, 10 - control group. At the I stage dancers for participation in the experimental group with regard to their hypnosis ability for facilitation teaching dynamic meditation were selected. Sportsmen with the 2nd -3rd stage of hypnosis were enrolled to the experimental group. At the II stage the experimental group was trained in the method of dynamic meditation. For this, the static meditation was performed first, after this the test persons opened their eyes and without leaving the achieved result with help of the static state of meditation, practiced in dynamic meditation. At the III stage training in sports ballroom dances with introduction new steps changing the composition program sequence to composition was held. The coach evaluated response of the test persons in the state of the dynamic meditation. Results: at the II stage of the research on training in dynamic meditation the dancers of the experimental group needed 3-7 repetitions. At the III stage of the research 8 test persons had trained to response adequately to changes in the compositions within 10-15 repetitions. In the control group if a partner changed steps during performance of the composition it led to stop of the dancing couple. For 8 test persons in the experimental group steps replacement didn’t affect adversely the quality of the dance. The senior group of dancers studied new steps with great difficulty, their motion stereotype was formed badly, they preferred to dance compositions trained earlier. The seniors having insufficient technical background (2 persons showed low abilities, they had bad memory, they spent 3 months for mastering new compositions. Conclusions: The methods elaborated

  11. Towards quantifying cochlear implant localization performance in complex acoustic environments.

    Science.gov (United States)

    Kerber, S; Seeber, B U

    2011-08-01

    Cochlear implant (CI) users frequently report listening difficulties in reverberant and noisy spaces. While it is common to assess speech understanding with implants in background noise, binaural hearing performance has rarely been quantified in the presence of other sources, although the binaural system is a major contributor to the robustness of speech understanding in noisy situations with normal hearing. Here, a pointing task was used to measure horizontal localization ability of a bilateral CI user in quiet and in a continuous diffuse noise interferer at a signal-to-noise ratio of 0 dB. Results were compared to localization performance of six normal hearing listeners. The average localization error of the normal hearing listeners was within normal ranges reported previously and only increased by 1.8° when the interfering noise was introduced. In contrast, the bilateral CI user showed a localization error of 22° in quiet which rose to 31° in noise. This increase was partly due to target sounds being inaudible when presented from frontal locations between -20° and +20°. With the noise present, the implant user was only able to reliably hear target sounds presented from locations well off the median plane. The results give support to the informal complaints raised by CI users and can help to define targets for the design of, e.g., noise reduction algorithms for implant processors.

  12. Irrigation performance assessment in Crimea, Ukraine

    NARCIS (Netherlands)

    Pavlov, S.S.; Roerink, G.J.; Hellegers, P.J.G.J.; Popovych, V.F.

    2006-01-01

    After the collapse of the Soviet Union the performance of irrigated agriculture decreased drastically in Ukraine, due to problems related to the transition from a centrally planned economy to a market economy. Before formulating recommendations on required actions to modify this problematic situatio

  13. Irrigation performance assessment in Crimea, Ukraine

    NARCIS (Netherlands)

    Pavlov, S.S.; Roerink, G.J.; Hellegers, P.J.G.J.; Popovych, V.F.

    2006-01-01

    After the collapse of the Soviet Union the performance of irrigated agriculture decreased drastically in Ukraine, due to problems related to the transition from a centrally planned economy to a market economy. Before formulating recommendations on required actions to modify this problematic

  14. Assessment beyond Performance: Phenomenography in Educational Evaluation

    Science.gov (United States)

    Micari, Marina; Light, Gregory; Calkins, Susanna; Streitwieser, Bernhard

    2007-01-01

    Increasing calls for accountability in education have promoted improvements in quantitative evaluation approaches that measure student performance; however, this has often been to the detriment of qualitative approaches, reducing the richness of educational evaluation as an enterprise. In this article the authors assert that it is not merely…

  15. Assessment beyond Performance: Phenomenography in Educational Evaluation

    Science.gov (United States)

    Micari, Marina; Light, Gregory; Calkins, Susanna; Streitwieser, Bernhard

    2007-01-01

    Increasing calls for accountability in education have promoted improvements in quantitative evaluation approaches that measure student performance; however, this has often been to the detriment of qualitative approaches, reducing the richness of educational evaluation as an enterprise. In this article the authors assert that it is not merely…

  16. Using urbanization profiles to assess screening performance

    NARCIS (Netherlands)

    Boon, ME; Kok, LP

    2004-01-01

    The large Dutch data sets acquired as a result of population-based cervical smear screening programs can be further exploited to obtain an urbanization-weighted score to gain insight into the quality of the performance of the individual cytology laboratories. Based on the first four digits of the po

  17. Effects of task complexity on rhythmic reproduction performance in adults.

    Science.gov (United States)

    Iannarilli, Flora; Vannozzi, Giuseppe; Iosa, Marco; Pesce, Caterina; Capranica, Laura

    2013-02-01

    The aim of the present study was to investigate the effect of task complexity on the capability to reproduce rhythmic patterns. Sedentary musically illiterate individuals (age: 34.8±4.2 yrs; M±SD) were administered a rhythmic test including three rhythmic patterns to be reproduced by means of finger-tapping, foot-tapping and walking. For the quantification of subjects' ability in the reproduction of rhythmic patterns, qualitative and quantitative parameters were submitted to analysis. A stereophotogrammetric system was used to reconstruct and evaluate individual performances. The findings indicated a good internal stability of the rhythmic reproduction, suggesting that the present experimental design is suitable to discriminate the participants' rhythmic ability. Qualitative aspects of rhythmic reproduction (i.e., speed of execution and temporal ratios between events) varied as a function of the perceptual-motor requirements of the rhythmic reproduction task, with larger reproduction deviations in the walking task. Copyright © 2013 Elsevier B.V. All rights reserved.

  18. A graph theoretical approach for assessing bio-macromolecular complex structural stability.

    Science.gov (United States)

    Del Carpio, Carlos Adriel; Iulian Florea, Mihai; Suzuki, Ai; Tsuboi, Hideyuki; Hatakeyama, Nozomu; Endou, Akira; Takaba, Hiromitsu; Ichiishi, Eiichiro; Miyamoto, Akira

    2009-11-01

    Fast and proper assessment of bio macro-molecular complex structural rigidity as a measure of structural stability can be useful in systematic studies to predict molecular function, and can also enable the design of rapid scoring functions to rank automatically generated bio-molecular complexes. Based on the graph theoretical approach of Jacobs et al. [Jacobs DJ, Rader AJ, Kuhn LA, Thorpe MF (2001) Protein flexibility predictions using graph theory. Proteins: Struct Funct Genet 44:150-165] for expressing molecular flexibility, we propose a new scheme to analyze the structural stability of bio-molecular complexes. This analysis is performed in terms of the identification in interacting subunits of clusters of flappy amino acids (those constituting regions of potential internal motion) that undergo an increase in rigidity at complex formation. Gains in structural rigidity of the interacting subunits upon bio-molecular complex formation can be evaluated by expansion of the network of intra-molecular inter-atomic interactions to include inter-molecular inter-atomic interaction terms. We propose two indices for quantifying this change: one local, which can express localized (at the amino acid level) structural rigidity, the other global to express overall structural stability for the complex. The new system is validated with a series of protein complex structures reported in the protein data bank. Finally, the indices are used as scoring coefficients to rank automatically generated protein complex decoys.

  19. Multimedia-based performance assessment in Dutch vocational education

    OpenAIRE

    Klerk, Sebastiaan

    2016-01-01

    In this PhD thesis, a new method of assessment, which we have called Multimedia-based Performance Assessment (MBPA) is presented and studied in the context of Dutch vocational education. An MBPA is an assessment that incorporates multiple types of multimedia and is used to assess the skills that are usually measured through Performance-based Assessment (PBA). The goal of the research presented in this thesis was to investigate whether MBPA is a more efficient and effective way of assessing st...

  20. Corporate Governance - Enterprise Performance Assessment Tool

    Directory of Open Access Journals (Sweden)

    Nicoleta Constandache

    2016-05-01

    Full Text Available Within an enterprise, whether public or private, there are interests between managers and partners: shareholders, creditors, employees, suppliers, customers etc. It is imperative that these interests be harmonized because the company's performance is significantly influenced by the form of corporate governance. Performance and sustainable growth in the long term are essential attributes of corporate governance, which depend on concern of companies on social responsibility towards the environment, satisfaction of shareholders, customer satisfaction, ensuring good working conditions for employees, concerns which must be incorporated into processes of decision making. In this study, the purpose of research is to analyze corporate governance issues and objectives involved to provide an overview of the positive effects generated by the implementation of its principles.

  1. Performance Assessment of Passive Hearing Protection Devices

    Science.gov (United States)

    2014-10-24

    rounds from a weapon can cause temporary hearing loss equivalent to wearing an earmuff, therefore producing the undesired result of impairing the...ability to monitor the environment. Repeated unprotected exposures to small arms fire that may generate these temporary changes can eventually result in...protectors: Performance and head motion analysis in a visual search task. Proceedings of the 46th Annual Meeting of the Human Factors and Ergonomics

  2. 2011 PERFORMANCE ASSESSMENT COMMUNITY OF PRACTICE TECHNICAL EXCHANGE - SUMMARY

    Energy Technology Data Exchange (ETDEWEB)

    Seitz, R.

    2011-12-30

    The Performance Assessment Community of Practice (PA CoP) was developed in 2008 to improve consistency and quality in the preparation of performance assessments (PAs) and risk assessments across the Department of Energy (DOE) Complex. The term, PA, is used to represent all of these modeling applications in this report. The PA CoP goals are to foster the exchange of information among PA practitioners and to share lessons learned from PAs conducted for DOE, commercial disposal facilities, and international entities. Technical exchanges and workshops are a cornerstone of PA CoP activities. Previous technical exchanges have addressed Engineered Barriers (2009 - http://www.cresp.org/education/workshops/pacop/), the Advanced Simulation Capability for Environmental Management and the Cementitious Barriers Partnership (2010 - http://srnl.doe.gov/copexchange/links.htm). Each technical exchange also includes summary presentations regarding activities at DOE, the Nuclear Regulatory Commission (NRC) and other organizations (e.g., International Atomic Energy Agency (IAEA)) as well as a number of presentations from selected sites to provide insight and perspective from on-going modeling activities. Through the deployment of PA Assistance Teams, the PA CoP has also been engaged in the development of new PAs across the DOE Complex. As a way of improving consistency in the preparation of new PAs, the teams provide technical advice and share experiences, noteworthy practices, and lessons learned from previous Low-Level Waste Disposal Facility Federal Review Group (LFRG) reviews. Teams have provided support for PAs at Hanford, Idaho, Paducah and Portsmouth. The third annual PA CoP Technical Exchange was held on May 25-26, 2011 in Atlanta, GA. The PA CoP Steering Committee Meeting held its first meeting on May 24 prior to the Technical Exchange. Decision making using models and software quality assurance were the topical emphasis for the exchange. A new feature at the 2011 technical

  3. An Empirical Study of a Solo Performance Assessment Model

    Science.gov (United States)

    Russell, Brian E.

    2015-01-01

    The purpose of this study was to test a hypothesized model of solo music performance assessment. Specifically, this study investigates the influence of technique and musical expression on perceptions of overall performance quality. The Aural Musical Performance Quality (AMPQ) measure was created to measure overall performance quality, technique,…

  4. Assessing performance of feedlot operations using epidemiology.

    Science.gov (United States)

    Corbin, Marilyn J; Griffin, Dee

    2006-03-01

    The progressive feedlot veterinarian must be well versed not only in individual production animal medicine, but also in population-based medicine. Feedlot health programs must be goal oriented, and evaluation of these goals is accomplished through diligent use of record systems and analytic evaluation of these record systems. Basic feedlot monitoring parameters include health and economic parameters in addition to the use of bench marking parameters between and among feed yards. When these parameters have significant changes, steps should be initiated to begin field investigations. Feedlot epidemiology uses several novel applications such as partial budgeting, risk assessment, and packing plant audits to provide scientifically sound and economically feasible solutions for the feeding industry.

  5. High-performance mussel-inspired adhesives of reduced complexity

    National Research Council Canada - National Science Library

    Ahn, B Kollbe; Das, Saurabh; Linstadt, Roscoe; Kaufman, Yair; Martinez-Rodriguez, Nadine R; Mirshafian, Razieh; Kesselman, Ellina; Talmon, Yeshayahu; Lipshutz, Bruce H; Israelachvili, Jacob N; Waite, J Herbert

    2015-01-01

    .... Translation of mussel-inspired wet adhesion typically entails catechol functionalization of polymers and/or polyelectrolytes, and solution processing of many complex components and steps that require...

  6. Thorium fuel performance assessment in HTRs

    Energy Technology Data Exchange (ETDEWEB)

    Allelein, H.-J. [Forschungszentrum Jülich, D-52425 Jülich (Germany); RWTH Aachen, D-52072 Aachen (Germany); Kania, M.J.; Nabielek, H. [Forschungszentrum Jülich, D-52425 Jülich (Germany); Verfondern, K., E-mail: k.verfondern@fz-juelich.de [Forschungszentrum Jülich, D-52425 Jülich (Germany)

    2014-05-01

    Thorium as a nuclear fuel is receiving renewed interest, because of its widespread availability and the good irradiation performance of Th and mixed (Th,U) oxide compounds as fuels in nuclear power systems. Early HTR development employed thorium together with high-enriched uranium. After 1980, most HTR fuel systems switched to low-enriched uranium. After completing fuel development for AVR and THTR with BISO coated particles, the German program expanded efforts on a new program utilizing thorium and high-enriched uranium TRISO coated particles for advanced HTR concepts for process heat applications (PNP) and direct-cycle electricity production (HHT). The combination of LTI inner and outer pyrocarbon layers surrounding a strong, stable SiC layer greatly improved manufacturing conditions and the subsequent contamination and defective particle fractions in production fuel elements. In addition, this combination provided improved mechanical strength and a higher degree of solid fission product retention, not known previously with HTI-BISO coatings. The improved performance of the HEU (Th,U)O{sub 2} TRISO fuel system was successfully demonstrated in three primary areas of development: manufacturing, irradiation testing under normal operating conditions, and accident simulation testing. In terms of demonstrating performance for advanced HTR applications, the experimental failure statistic from manufacture and irradiation testing are significantly below the coated particle requirements specified for PNP and HHT designs at the time. Covering a range to 1300 °C in normal operations and 1600 °C in accidents, with burnups up to 13% FIMA and fast fluences to 8 × 10{sup 25} m{sup −2} (E > 16 fJ), the results exceed the design limits on manufacturing and operational requirements for the German HTR Modul concept, which were: <6.5 × 10{sup −5} for manufacturing; <2 × 10{sup −4} for normal operating conditions; and <5 × 10{sup −4} for accident conditions. These

  7. Microplastics in the Solent estuarine complex, UK: An initial assessment.

    Science.gov (United States)

    Gallagher, Anthony; Rees, Aldous; Rowe, Rob; Stevens, John; Wright, Paul

    2016-01-30

    Microplastics are known to be an increasing component found within both marine sediments and the water column. This study carried out an initial assessment of the levels of microplastics present within the Solent estuarine complex, focusing specifically on the water column. A plankton net trawl survey was carried out, with samples analysed using visual observation and Fourier Transform Infrared Spectroscopy (FT-IR). The study identified significant quantities of plastics, ranging in shape, with hot spots found at confluence points within the estuary. Though the FT-IR analysis was inconclusive, the nature of the samples indicates the effect of oceanographic conditions on the prevalent types of microplastics found, which in turn identifies key local sources such as wastewater treatment plants and the plastics industry as being the dominant inputs.

  8. Predictive performance simulations for a sustainable lecture building complex

    CSIR Research Space (South Africa)

    Conradie, Dirk CU

    2012-06-01

    Full Text Available and office building complex for the East London campus of the University of Fort Hare. The design of the building is both unique and complex, combining wind-driven technologies (an aerofoil) and solar-driven technologies (a Trombe wall) to drive a...

  9. Product Complexity Impact on Quality and Delivery Performance

    DEFF Research Database (Denmark)

    Nielsen, Jeppe Bjerrum; Hvam, Lars

    2011-01-01

    Existing literature on product portfolio complexity is mainly focused on cost related aspects. It is widely acknowledged that an increase in a company’s product portfolio will lead to an increase in complexity related costs such as order management, procurement and inventory. The objective of thi...... more quality related complaints for the product variants, seldom engineered and produced....

  10. Peer mentoring in doctor performance assessment: strategies, obstacles and benefits.

    NARCIS (Netherlands)

    Overeem, K.; Driessen, E.W.; Arah, O.A.; Lombarts, K.M.; Wollersheim, H.C.H.; Grol, R.P.T.M.

    2010-01-01

    CONTEXT: Mentors are increasingly involved in doctor performance assessments. Mentoring seems to be a key determinant in achieving the ultimate goal of those assessments, namely, improving doctor performance. Little is known, however, about how mentors perceive and fulfil this role. OBJECTIVE: The a

  11. Understanding and Developing Rubrics for Music Performance Assessment

    Science.gov (United States)

    Wesolowski, Brian C.

    2012-01-01

    A primary difficulty with music performance assessment is managing its subjective nature. To help improve objectivity, rubrics can be used to develop a set of guidelines for clearly assessing student performance. Moreover, rubrics serve as documentation for student achievement that provides music teachers with a written form of accountability.…

  12. Music Performance Assessment: Exploring Three Approaches for Quality Rubric Construction

    Science.gov (United States)

    DeLuca, Christopher; Bolden, Benjamin

    2014-01-01

    Assessing student performance is a central challenge for music educators. In alignment with previous research, this article asserts that rubrics provide a viable and useful structure for assessing music performance. To expand the potential of rubrics in music education, challenges to effective rubric construction are identified and addressed…

  13. 10 CFR 63.114 - Requirements for performance assessment.

    Science.gov (United States)

    2010-01-01

    ... the technical basis for either inclusion or exclusion of degradation, deterioration, or alteration... performance assessment specified at § 63.342. (5) Provide the technical basis for either inclusion or exclusion of specific features, events, and processes in the performance assessment. Specific...

  14. Identity Affirmed, Agency Engaged: Culturally Responsive Performance-Based Assessment

    Science.gov (United States)

    Rosa, Ricardo

    2017-01-01

    Performance-based assessment is unquestionably superior to the instrumental rationality of high-stakes standardized testing and the audit culture that testing regimes inspire. It is more likely to engender opportunities to witness the un-measureable: vision, imagination, and compassion. Performance assessments must be culturally responsive in…

  15. Peer mentoring in doctor performance assessment: strategies, obstacles and benefits

    NARCIS (Netherlands)

    K. Overeem; E.W. Driessen; O.A. Arah; K.M.J.M.H. Lombarts; H.C. Wollersheim; R.P.T.M. Grol

    2010-01-01

    CONTEXT: Mentors are increasingly involved in doctor performance assessments. Mentoring seems to be a key determinant in achieving the ultimate goal of those assessments, namely, improving doctor performance. Little is known, however, about how mentors perceive and fulfil this role. OBJECTIVE: The a

  16. Great Performances: Creating Classroom-Based Assessment Tasks.

    Science.gov (United States)

    Lewin, Larry; Shoemaker, Betty Jean

    This book presents an approach to developing performance assessments. It begins with four steps for "Info In" and moves to four "Info Out" modes through which students can make their content understanding explicit for evaluation purposes. The first chapter is an overview of performance assessment in the classroom. Chapter 2 discusses the "Info In"…

  17. Synchronous and Cogged Fan Belt Performance Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Cutler, D.; Dean, J.; Acosta, J.

    2014-02-01

    The GSA Regional GPG Team commissioned the National Renewable Energy Laboratory (NREL) to perform monitoring of cogged V-belts and synchronous belts on both a constant volume and a variable air volume fan at the Byron G. Rodgers Federal Building and U.S. Courthouse in Denver, Colorado. These motor/fan combinations were tested with their original, standard V-belts (appropriately tensioned by an operation and maintenance professional) to obtain a baseline for standard operation. They were then switched to the cogged V-belts, and finally to synchronous belts. The power consumption by the motor was normalized for both fan speed and air density changes. This was necessary to ensure that the power readings were not influenced by a change in rotational fan speed or by the power required to push denser air. Finally, energy savings and operation and maintenance savings were compiled into an economic life-cycle cost analysis of the different belt options.

  18. Evaluating the Utility of Minnesota's Teacher Performance Assessment

    Science.gov (United States)

    Wiechman, Jeffery P.

    2013-01-01

    Teacher preparation is a hot topic in the world of education today. Performance assessments mark one way that colleges may prove the readiness of their pre-service teaching candidates for a career in the classroom. This study used methods to evaluate one college's effort to implement such an assessment, to integrate assessment tasks into its…

  19. Automated Cognitive Health Assessment Using Smart Home Monitoring of Complex Tasks.

    Science.gov (United States)

    Dawadi, Prafulla N; Cook, Diane J; Schmitter-Edgecombe, Maureen

    2013-11-01

    One of the many services that intelligent systems can provide is the automated assessment of resident well-being. We hypothesize that the functional health of individuals, or ability of individuals to perform activities independently without assistance, can be estimated by tracking their activities using smart home technologies. In this paper, we introduce a machine learning-based method for assessing activity quality in smart homes. To validate our approach we quantify activity quality for 179 volunteer participants who performed a complex, interweaved set of activities in our smart home apartment. We observed a statistically significant correlation (r=0.79) between automated assessment of task quality and direct observation scores. Using machine learning techniques to predict the cognitive health of the participants based on task quality is accomplished with an AUC value of 0.64. We believe that this capability is an important step in understanding everyday functional health of individuals in their home environments.

  20. Creation of complexity assessment tool for patients receiving home care

    Directory of Open Access Journals (Sweden)

    Maria Leopoldina de Castro Villas Bôas

    2016-06-01

    Full Text Available Abstract OBJECTIVE To create and validate a complexity assessment tool for patients receiving home care from a public health service. METHOD A diagnostic accuracy study, with estimates for the tool's validity and reliability. Measurements of sensitivity and specificity were considered when producing validity estimates. The resulting tool was used for testing. Assessment by a specialized team of home care professionals was used as the gold standard. In the tool's reliability study, the authors used the Kappa statistic. The tool's sensitivity and specificity were analyzed using various cut-off points. RESULTS On the best cut-off point-21-with the gold standard, a sensitivity of 75.5% was obtained, with the limits of confidence interval (95% at 68.3% and 82.8% and specificity of 53.2%, with the limits of confidence interval (95% at 43.8% and 62.7%. CONCLUSION The tool presented evidence of validity and reliability, possibly helping in service organization at patient admission, care type change, or support during the creation of care plans.

  1. Performance Assessment Framework for Private Finance Initiative Projects in Malaysia

    Directory of Open Access Journals (Sweden)

    Lop Nor Suzila

    2016-01-01

    Full Text Available Private Finance Initiative (PFI is viewed as restructuring the previous privatisation concept in delivering value for money for the Malaysian public infrastructure. Among the restructuring efforts in the privatisation is specifying the standard assessment of private concessionaires’ performance through the execution of key performance indicators (KPIs where the private concessionaires’ performance is benchmarked against the government’s standard. KPIs have served as useful tools in assessing performance of PFI projects. However, there is still lacking on determination methods performed to define and measure this KPIs and the absence of guidelines or a framework is also an issue in the implementation of the PFI procurement in Malaysia. Therefore, the objectives of this paper is to investigate the notion of performance assessment model approaches globally (i.e. UK, China, Australia, Serbia and Malaysia and to identify direction for PFI performance assessment tools (KPIs to be practiced in Malaysia. Based on the consideration of these models, this research paper propose an initial framework of performance assessment for PFI projects in Malaysia. The framework is deliberate to cover the performance of PFI at the operation and maintenance phase. The outcomes of this paper can serve as a theoretical base for the development of comprehensive and effective performance assessment for PFI projects in Malaysia.

  2. Project Complexity Influence on Project management performance – The Malaysian perspective

    OpenAIRE

    Abdou Saed M; Yong Kuan; Othman Mohammed

    2016-01-01

    The project complexity has a negative influence upon project management process particularly on the project performance. The lack of consensus on project complexity is a crucial problem as project complexity is closely correlated with the project management process as well as the project management performance. Therefore,the understanding of project complexity is of significant importance to address the problem of project management performance. Our extensive literature review enlightened the...

  3. Assessing Organizational Effectiveness: The Role of Performance Measures

    Science.gov (United States)

    Matthews, Joseph R.

    2011-01-01

    A brief overview of the challenges associated with demonstrating organizational effectiveness and the role of performance measures as surrogates for demonstrating effectiveness are provided. The complexity of analysis and the importance of use of performance measures provide a way to review the strengths and weakness of eight different ways to…

  4. Assessing Organizational Effectiveness: The Role of Performance Measures

    Science.gov (United States)

    Matthews, Joseph R.

    2011-01-01

    A brief overview of the challenges associated with demonstrating organizational effectiveness and the role of performance measures as surrogates for demonstrating effectiveness are provided. The complexity of analysis and the importance of use of performance measures provide a way to review the strengths and weakness of eight different ways to…

  5. Exploring perceived organisational formalisation and performance review system complexity as predictors of executive alienation in performance review systems

    Directory of Open Access Journals (Sweden)

    S. Senthil Ganesh

    2011-12-01

    Full Text Available A number of discussions in organisation literature have focused on the alienating effect of formalisation on managerial as well as non-managerial employees. Most of the research studies have found support for the direct influence of formalisation on alienation, both positively as well as negatively. A few studies have found that formalisation did not have a direct influence on alienation but through the effects of other variables like role conflict, role ambiguity and organisational identification. We examined whether perceived performance review system complexity would predict variance in executive alienation beyond that predicted by perceived organisational formalisation in earlier studies. A total of 477 executives participated in a study that examined the factors associated with executive alienation. The outcome of our assessment shows that while there is no significant direct influence of perceived organisational formalisation on executive alienation, it has an indirect effect on executive alienation through perceived performance review system complexity. Based on the outcome, we discuss the implications for future research and practice.

  6. A (Small) Complexity Performance Contest: SPT versus LBFS

    DEFF Research Database (Denmark)

    Nielsen, Erland Hejn

    2002-01-01

    When discussing the nature of loading rules relevant to continuous dynamic job/flow shop systems, the general understanding is that results obtained in simpler structures of 2 to 4 machines are invariant to scaling and can be generalised without problems to more complex structures. The SPT...... (Shortest Processing Time) loading rule has to a great extent gained its reputation of superiority that way. However, emphasis on the element of job re-entrance and its possible consequence on the choice of loading rule have not really been present until the early nineties, when a series of interesting...... results on pure re-entrant flow shop structures emerges. It now seems that alternative loading rules as for instance the LBFS (Last Buffer First Served) due to its strong long run stabilising property attracts quite some interest. To be more precise about the complexity aspect, complexity in job...

  7. Objective evaluation of the effect of noise on the performance of a complex laparoscopic task.

    Science.gov (United States)

    Moorthy, K; Munz, Y; Undre, S; Darzi, A

    2004-07-01

    Noise in operating rooms has been found to be much higher than the recommended level of 45 dB. The aim of this study was to objectively evaluate the effect of noise and music on the performance of a complex surgical task. Twelve surgeons with varying experience in laparoscopic suturing undertook 3 sutures in a laparoscopic trainer under 3 conditions: quiet, noise at 80 to 85 dB, and music. Other than the test conditions, all other conditions were standardized. A validated motion analysis system was used to assess performance. The tasks were recorded by video and played back to 2 blinded observers who rated the surgeons' performance on a global rating scale by observing the tasks for accuracy, knot quality, and number of nonpurposeful movements. Time taken for the tasks (P=.78), total number of movements (P=.78), total path length (P=.47), global score (P=.54), accuracy, and knot quality remained unchanged across the 3 conditions. The main study measures had a high test-retest reliability and internal consistency. No learning effect was seen across the 3 conditions. Surgeons can effectively "block out" noise and music. This is probably due to the high levels of concentration required for the performance of a complex surgical task. Future research should focus on the effect of these conditions on communication in the operating room.

  8. A performance analysis study of a complex G field experiment

    Science.gov (United States)

    Repperger, D. W.

    1982-01-01

    A performance analysis on data from an experiment which illustrates the degradation of tracking performance as the human is subjected to an environmental stressor is presented. The performance changes are defined and the statistical properties of human tracking with and without the stress effects examined. Performance is evaluated using an extension of a phase plane technique. A quantiative determination of stress effects on performance is defined explicitly in terms of parameters of a density function identified from the empirical data. The distribution functions which characterize tracking in a phase plane representation of the closed loop error signal are determined.

  9. Assessing the complexity of short-term heartbeat interval series by distribution entropy.

    Science.gov (United States)

    Li, Peng; Liu, Chengyu; Li, Ke; Zheng, Dingchang; Liu, Changchun; Hou, Yinglong

    2015-01-01

    Complexity of heartbeat interval series is typically measured by entropy. Recent studies have found that sample entropy (SampEn) or fuzzy entropy (FuzzyEn) quantifies essentially the randomness, which may not be uniformly identical to complexity. Additionally, these entropy measures are heavily dependent on the predetermined parameters and confined to data length. Aiming at improving the robustness of complexity assessment for short-term RR interval series, this study developed a novel measure--distribution entropy (DistEn). The DistEn took full advantage of the inherent information underlying the vector-to-vector distances in the state space by probability density estimation. Performances of DistEn were examined by theoretical data and experimental short-term RR interval series. Results showed that DistEn correctly ranked the complexity of simulated chaotic series and Gaussian noise series. The DistEn had relatively lower sensitivity to the predetermined parameters and showed stability even for quantifying the complexity of extremely short series. Analysis further showed that the DistEn indicated the loss of complexity in both healthy aging and heart failure patients (both p < 0.01), whereas neither the SampEn nor the FuzzyEn achieved comparable results (all p ≥ 0.05). This study suggested that the DistEn would be a promising measure for prompt clinical examination of cardiovascular function.

  10. [Teaching performance assessment in Public Health employing three different strategies].

    Science.gov (United States)

    Martínez-González, Adrián; Moreno-Altamirano, Laura; Ponce-Rosas, Efrén Raúl; Martínez-Franco, Adrián Israel; Urrutia-Aguilar, María Esther

    2011-01-01

    The educational system depends upon the quality and performance of their faculty and should therefore be process of continuous improvement. To assess the teaching performance of the Public Health professors, at the Faculty of Medicine, UNAM through three strategies. Justification study. The evaluation was conducted under a mediational model through three strategies: students' opinion assessment, self-assessment and students' academic achievement. We applied descriptive statistics, Student t test, ANOVA and Pearson correlation. Twenty professors were evaluated from the Public Health department, representing 57% of all them who teach the subject. The professor's performance was highly valued self-assessment compared with assessment of student opinion, was confirmed by statistical analysis the difference was significant. The difference amongst the three evaluation strategies became more evident between self-assessment and the scores obtained by students in their academic achievement. The integration of these three strategies offers a more complete view of the teacher's performance quality. Academic achievement appears to be a more objective strategy for teaching performance assessment than students' opinion and self-assessment.

  11. Toxicological risk assessment of complex mixtures through the Wtox model

    Directory of Open Access Journals (Sweden)

    William Gerson Matias

    2015-01-01

    Full Text Available Mathematical models are important tools for environmental management and risk assessment. Predictions about the toxicity of chemical mixtures must be enhanced due to the complexity of eects that can be caused to the living species. In this work, the environmental risk was accessed addressing the need to study the relationship between the organism and xenobiotics. Therefore, ve toxicological endpoints were applied through the WTox Model, and with this methodology we obtained the risk classication of potentially toxic substances. Acute and chronic toxicity, citotoxicity and genotoxicity were observed in the organisms Daphnia magna, Vibrio scheri and Oreochromis niloticus. A case study was conducted with solid wastes from textile, metal-mechanic and pulp and paper industries. The results have shown that several industrial wastes induced mortality, reproductive eects, micronucleus formation and increases in the rate of lipid peroxidation and DNA methylation of the organisms tested. These results, analyzed together through the WTox Model, allowed the classication of the environmental risk of industrial wastes. The evaluation showed that the toxicological environmental risk of the samples analyzed can be classied as signicant or critical.

  12. Performance of Random Effects Model Estimators under Complex Sampling Designs

    Science.gov (United States)

    Jia, Yue; Stokes, Lynne; Harris, Ian; Wang, Yan

    2011-01-01

    In this article, we consider estimation of parameters of random effects models from samples collected via complex multistage designs. Incorporation of sampling weights is one way to reduce estimation bias due to unequal probabilities of selection. Several weighting methods have been proposed in the literature for estimating the parameters of…

  13. A (Small) complexity performance contest: SPT versus LBFS

    DEFF Research Database (Denmark)

    Nielsen, Erland Hejn

    2002-01-01

    When discussing the nature of loading rules relevant to continuous dynamic job/flow shop systems, the general understanding is that results obtained in simpler structures of 2 to 4 machines are invariant to scaling and can be generalised without problems to more complex structures. The SPT (Short...

  14. A (Small) Complexity Performance Contest: SPT versus LBFS

    DEFF Research Database (Denmark)

    Nielsen, Erland Hejn

    2002-01-01

    When discussing the nature of loading rules relevant to continuous dynamic job/flow shop systems, the general understanding is that results obtained in simpler structures of 2 to 4 machines are invariant to scaling and can be generalised without problems to more complex structures. The SPT (Short...

  15. Performance assessment implementation plan for the geologic repository program

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1990-01-01

    Performance assessment is a major constituent of the program being conducted in the Civilian Radioactive Waste Management (CRWM) Program of the US Department of Energy (DOE) to develop a geologic repository. Performance assessment is the set of activities needed for quantitative evaluations of repository-system performance to access compliance with regulations and to support the development of the geologic repository. To define the strategy for these evaluations, the DOE has developed this performance assessment strategy plan. This document discusses the need for such a strategy, the objectives and scope of the strategy plan, the relationship of the plan to other program plans. Additionally, it defines performance assessment and describes the roles of performance assessment in this program, discusses concepts and general strategies needed for performance assessment, outlines the content of the Safety Analysis Report, summarizes the requirements for the repository Environmental Impact Statement, discusses the requirements that apply to the site-suitability analyses and describes the site characterization. 10 figs., 7 tabs.

  16. Complex matrix multiplication operations with data pre-conditioning in a high performance computing architecture

    Science.gov (United States)

    Eichenberger, Alexandre E; Gschwind, Michael K; Gunnels, John A

    2014-02-11

    Mechanisms for performing a complex matrix multiplication operation are provided. A vector load operation is performed to load a first vector operand of the complex matrix multiplication operation to a first target vector register. The first vector operand comprises a real and imaginary part of a first complex vector value. A complex load and splat operation is performed to load a second complex vector value of a second vector operand and replicate the second complex vector value within a second target vector register. The second complex vector value has a real and imaginary part. A cross multiply add operation is performed on elements of the first target vector register and elements of the second target vector register to generate a partial product of the complex matrix multiplication operation. The partial product is accumulated with other partial products and a resulting accumulated partial product is stored in a result vector register.

  17. Hanford low-level tank waste interim performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Mann, F.M.

    1996-09-16

    The Hanford Low-Level Tank Waste Interim Performance Assessment examines the long-term environmental and human health effects associated with the disposal of the low-level fraction of the Hanford single- and double-shell tank waste in the Hanford Site 200 East Area. This report was prepared as a good management practice to provide needed information about the relationship between the disposal system design and its performance as early as possible in the project cycle. The calculations in this performance assessment show that the disposal of the low-level fraction can meet environmental and health performance objectives.

  18. Hanford low-level tank waste interim performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Mann, F.M.

    1997-09-12

    The Hanford Low-Level Tank Waste Interim Performance Assessment examines the long-term environmental and human health effects associated with the disposal of the low-level fraction of the Hanford single and double-shell tank waste in the Hanford Site 200 East Area. This report was prepared as a good management practice to provide needed information about the relationship between the disposal system design and performance early in the disposal system project cycle. The calculations in this performance assessment show that the disposal of the low-level fraction can meet environmental and health performance objectives.

  19. A consistent multi-user framework for assessing system performance

    CERN Document Server

    Reed, C M

    2010-01-01

    Agreeing suitability for purpose and procurement decisions depend on assessment of real or simulated performances of sonar systems against user requirements for particular scenarios. There may be multiple pertinent aspects of performance (e.g. detection, track estimation, identification/classification and cost) and multiple users (e.g. within picture compilation, threat assessment, resource allocation and intercept control tasks), each with different requirements. Further, the estimates of performances and the user requirements are likely to be uncertain. In such circumstances, how can we reliably assess and compare the effectiveness of candidate systems? This paper presents a general yet simple mathematical framework that achieves all of this. First, the general requirements of a satisfactory framework are outlined. Then, starting from a definition of a measure of effectiveness (MOE) based on set theory, the formulae for assessing performance in various applications are obtained. These include combined MOEs,...

  20. An Analysis of the Text Complexity of Leveled Passages in Four Popular Classroom Reading Assessments

    Science.gov (United States)

    Toyama, Yukie; Hiebert, Elfrieda H.; Pearson, P. David

    2017-01-01

    This study investigated the complexity of leveled passages used in four classroom reading assessments. A total of 167 passages leveled for Grades 1-6 from these assessments were analyzed using four analytical tools of text complexity. More traditional, two-factor measures of text complexity found a general trend of fairly consistent across-grade…

  1. Small sample Bayesian analyses in assessment of weapon performance

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Abundant test data are required in assessment of weapon performance.When weapon test data are insufficient,Bayesian analyses in small sample circumstance should be considered and the test data should be provided by simulations.The several Bayesian approaches are discussed and some limitations are founded.An improvement is put forward after limitations of Bayesian approaches available are analyzed and t he improved approach is applied to assessment of some new weapon performance.

  2. Risk assessment tools to identify women with increased risk of osteoporotic fracture. Complexity or simplicity?

    DEFF Research Database (Denmark)

    Rubin, Katrine Hass; Friis-Holmberg, Teresa; Hermann, Anne Pernille

    2013-01-01

    A huge number of risk assessment tools have been developed. Far from all have been validated in external studies, more of them have absence of methodological and transparent evidence and few are integrated in national guidelines. Therefore, we performed a systematic review to provide an overview...... of existing valid and reliable risk assessment tools for prediction of osteoporotic fractures. Additionally, we aimed to determine if the performance each tool was sufficient for practical use and lastly to examine whether the complexity of the tools influenced their discriminative power. We searched Pub...... fracture outcomes. High quality studies in randomized design with population-based cohorts with different case mixes are needed. © 2013 American Society for Bone and Mineral Research....

  3. Reliable and Valid Assessment of Clinical Bronchoscopy Performance

    DEFF Research Database (Denmark)

    Konge, Lars; Larsen, Klaus Richter; Clementsen, Paul

    2012-01-01

    aimed for the use in a clinical setting. Methods: Five junior residents, 5 senior residents and 9 consultants performed 3 bronchoscopies each. All 57 bronchoscopies were video-recorded and assessed blindly and independently by two bronchoscopy experts using the new assessment tool. Results...

  4. Use and Performances of Web-Based Portfolio Assessment

    Science.gov (United States)

    Chang, Chi-Cheng; Tseng, Kuo-Hung

    2009-01-01

    This research explored the influence of a Web-based portfolio assessment system on students' performances. The methodological procedure adopted was to have the experimental group use the system, with the control group using conventional assessment. The study subjects were junior high school students of two computer classes. The experimental…

  5. Modeling Reduced Human Performance as a Complex Adaptive System

    Science.gov (United States)

    2003-09-01

    fittingly, the latest research paper describes these types of components as LEGOs (listener event graph objects). “The name is also a metaphor for how...Buss, A. H. and P. J. Sanchez (2002). Building Complex Models With LEGOs (Listener Event Graph Objects). Winter Simulation Conference. Buss, D. (1999...Kaarlela, C. (1997). New Gene Therapy Technique Could Eliminate Insulin Injections for many Diabetics, Jeffrey Norris and Jennifer O’Brien (415) 476-481

  6. Performance Assessment of OVERFLOW on Distributed Computing Environment

    Science.gov (United States)

    Djomehri, M. Jahed; Rizk, Yehia M.

    2000-01-01

    The aerodynamic computer code, OVERFLOW, with a multi-zone overset grid feature, has been parallelized to enhance its performance on distributed and shared memory paradigms. Practical application benchmarks have been set to assess the efficiency of code's parallelism on high-performance architectures. The code's performance has also been experimented with in the context of the distributed computing paradigm on distant computer resources using the Information Power Grid (IPG) toolkit, Globus. Two parallel versions of the code, namely OVERFLOW-MPI and -MLP, have developed around the natural coarse grained parallelism inherent in a multi-zonal domain decomposition paradigm. The algorithm invokes a strategy that forms a number of groups, each consisting of a zone, a cluster of zones and/or a partition of a large zone. Each group can be thought of as a process with one or multithreads assigned to it and that all groups run in parallel. The -MPI version of the code uses explicit message-passing based on the standard MPI library for sending and receiving interzonal boundary data across processors. The -MLP version employs no message-passing paradigm; the boundary data is transferred through the shared memory. The -MPI code is suited for both distributed and shared memory architectures, while the -MLP code can only be used on shared memory platforms. The IPG applications are implemented by the -MPI code using the Globus toolkit. While a computational task is distributed across multiple computer resources, the parallelism can be explored on each resource alone. Performance studies are achieved with some practical aerodynamic problems with complex geometries, consisting of 2.5 up to 33 million grid points and a large number of zonal blocks. The computations were executed primarily on SGI Origin 2000 multiprocessors and on the Cray T3E. OVERFLOW's IPG applications are carried out on NASA homogeneous metacomputing machines located at three sites, Ames, Langley and Glenn. Plans

  7. Radioecological assessment of marine environment: complexity, sensitivity and uncertainties

    Energy Technology Data Exchange (ETDEWEB)

    Iosjpe, Mikhail [Norwegian Radiation Protection Authority, P.O. Box 55, N-1332 Oesteraas (Norway)

    2014-07-01

    A compartment modelling approach is widely used to evaluate the consequences after the release of radionuclides into the marine environment, by taking into account: (i) dispersion of radionuclides in water and sediment phases, (ii) bioaccumulation of radionuclides in biota and (iii) dose assessments for marine organisms and human populations. The NRPA box model includes site-specific information for the compartments, advection of radioactivity between compartments, sedimentation, diffusion of radioactivity through pore water in sediment, resuspension, mixing due to bioturbation, particle mixing, a burial process for radionuclides in deep sediment layers and radioactive decay. The contamination of biota is calculated from the known radionuclide concentrations in filtered seawater in the different water regions. Doses to man are calculated on the basis of seafood consumption, in accordance with available data for seafood catches and assumptions about human diet in the respective areas. Dose to biota is calculated on the basis of radionuclide concentrations in marine organisms, water and sediment, using dose conversion factors. This modelling approach requires the use of a large set of parameters (up to several thousand), some of which have high uncertainties linked to them. This work consists of two parts: A radioecological assessment as described above, and a sensitivity and uncertainty analysis, which was applied to two release scenarios: (i) a potential accident with a nuclear submarine and (ii) unit uniform atmospheric deposition to selected marine areas. The sensitivity and uncertainty analysis is based on the calculation of local and global sensitivity indexes, and then compare this approach to the Monte-Carlo Methods. The simulations clearly demonstrate the complexities encountered when using the compartment modelling approach. It is shown that the results can strongly depend on the time being analyzed. For example, the change of a given parameter may either

  8. Threshold exceedance risk assessment in complex space-time systems

    Science.gov (United States)

    Angulo, José M.; Madrid, Ana E.; Romero, José L.

    2015-04-01

    Environmental and health impact risk assessment studies most often involve analysis and characterization of complex spatio-temporal dynamics. Recent developments in this context are addressed, among other objectives, to proper representation of structural heterogeneities, heavy-tailed processes, long-range dependence, intermittency, scaling behavior, etc. Extremal behaviour related to spatial threshold exceedances can be described in terms of geometrical characteristics and distribution patterns of excursion sets, which are the basis for construction of risk-related quantities, such as in the case of evolutionary study of 'hotspots' and long-term indicators of occurrence of extremal episodes. Derivation of flexible techniques, suitable for both the application under general conditions and the interpretation on singularities, is important for practice. Modern risk theory, a developing discipline motivated by the need to establish solid general mathematical-probabilistic foundations for rigorous definition and characterization of risk measures, has led to the introduction of a variety of classes and families, ranging from some conceptually inspired by specific fields of applications, to some intended to provide generality and flexibility to risk analysts under parametric specifications, etc. Quantile-based risk measures, such as Value-at-Risk (VaR), Average Value-at-Risk (AVaR), and generalization to spectral measures, are of particular interest for assessment under very general conditions. In this work, we study the application of quantile-based risk measures in the spatio-temporal context in relation to certain geometrical characteristics of spatial threshold exceedance sets. In particular, we establish a closed-form relationship between VaR, AVaR, and the expected value of threshold exceedance areas and excess volumes. Conditional simulation allows us, by means of empirical global and local spatial cumulative distributions, the derivation of various statistics of

  9. Complex mixtures, complex responses: Assessing pharmaceutical mixtures using field and laboratory approaches

    Science.gov (United States)

    Schoenfuss, Heiko L.; Furlong, Edward T.; Phillips, Patrick J.; Scott, Tia-Marie; Kolpin, Dana W.; Cetkovic-Cvrlje, Marina; Lesteberg, Kelsey E.; Rearick, Daniel C.

    2016-01-01

    Pharmaceuticals are present in low concentrations (tramadol), a muscle relaxant (methocarbamol), a simple antidepressant mixture (fluoxetine, paroxetine, venlafaxine), a sleep aid (temazepam), or a complex mixture of all compounds. Larval minnow response to effluent exposure was not consistent. The 2010 exposures resulted in shorter exposed minnow larvae, whereas the larvae exposed in 2012 exhibited altered escape behavior. Mature minnows exhibited altered hepatosomatic indices, with the strongest effects in females and in mixture exposures. In addition, laboratory-exposed, mature male minnows exposed to all pharmaceuticals (except the selective serotonin reuptake inhibitor mixture) defended nest sites less rigorously than fish in the control group. Tramadol or antidepressant mixture exposure resulted in increased splenic T lymphocytes. Only male minnows exposed to whole effluent responded with increased plasma vitellogenin concentrations. Female minnows exposed to pharmaceuticals (except the opioid mixture) had larger livers, likely as a compensatory result of greater prominence of vacuoles in liver hepatocytes. The observed alteration of apical endpoints central to sustaining fish populations confirms that effluents containing waste streams from pharmaceutical formulation facilities can adversely impact fish populations but that the effects may not be temporally consistent. The present study highlights the importance of including diverse biological endpoints spanning levels of biological organization and life stages when assessing contaminant interactions.

  10. an importance-performance assessment of delegates' satis

    African Journals Online (AJOL)

    user

    Importance-performance analysis (IPA) was first introduced into ... and high satisfaction with the performance of the ... service, quality, business facilities, value, room and front ... service organization to improve its services, ... tutional DINESERV factors that affect customer ..... are in-line with the delegates' assessment of the.

  11. Assessing the performance of urban water utilities in Mozambique ...

    African Journals Online (AJOL)

    Assessing the performance of urban water utilities in Mozambique using a water ... 12 key performance indicators grouped into 3 components (economic sustainability, ... The WUPI was built in 6 different ways, using 2 weighting systems (equal ... 3 different functional forms to aggregate the indicators (additive aggregation, ...

  12. Developing Performance-Based Assessments of Mariner Proficiency

    Science.gov (United States)

    2001-02-01

    8217 Training, Certification and Watchkeeping ( STCW ) Code. The study had two major objectives: (1) specify and refine a method for developing performance...method for developing performance-based assessments of mariner proficiency was created on the basis of a review of STCW requirements and the Instructional

  13. EEG activity during the performance of complex mental problems.

    Science.gov (United States)

    Jausovec, N; Jausovec, K

    2000-04-01

    This study investigated differences in cognitive processes related to problem complexity. It was assumed that these differences would be reflected in respondents' EEG activity--spectral power and coherence. A second issue of the study was to compare differences between the lower (alpha(1) = 7.9-10.0 Hz), and upper alpha band (alpha(2) = 10.1-12.9 Hz). In the first experiment two well-defined problems with two levels of complexity were used. Only minor differences in EEG power and coherence measures related to problem complexity were observed. In the second experiment divergent production problems resembling tasks on creativity tests were compared with dialectic problems calling for creative solutions. Differences in EEG power measures were mainly related to the form of problem presentation (figural/verbal). In contrast, coherence was related to the level of creativity needed to solve a problem. Noticeable increased intra- and interhemispheric cooperation between mainly the far distant brain regions was observed in the EEG activity of respondents while solving the dialectic problems. These results are explained by the more intense involvement of the long cortico-cortical fiber system in creative thinking. Differences between the lower and upper alpha band were significant for the power and coherence measures. In Experiment 2, fewer differences were observed in power measures in the upper alpha band than in the lower alpha band. A reverse pattern was observed for the coherence measures. These results hint to a functional independence of the two alpha bands, however, they do not allow to draw firm conclusions about their functional meanings. The study showed that it is unlikely that individuals solve well- and ill-defined problems by employing similar cognitive strategies.

  14. Performance assessment techniques for groundwater recovery and treatment systems

    Energy Technology Data Exchange (ETDEWEB)

    Kirkpatrick, G.L. [Environmental Resources Management, Inc., Exton, PA (United States)

    1993-03-01

    Groundwater recovery and treatment (pump and treat systems) continue to be the most commonly selected remedial technology for groundwater restoration and protection programs at hazardous waste sites and RCRA facilities nationwide. Implementing a typical groundwater recovery and treatment system includes the initial assessment of groundwater quality, characterizing aquifer hydrodynamics, recovery system design, system installation, testing, permitting, and operation and maintenance. This paper focuses on methods used to assess the long-term efficiency of a pump and treat system. Regulatory agencies and industry alike are sensitive to the need for accurate assessment of the performance and success of groundwater recovery systems for contaminant plume abatement and aquifer restoration. Several assessment methods are available to measure the long-term performance of a groundwater recovery system. This paper presents six assessment techniques: degree of compliance with regulatory agency agreement (Consent Order of Record of Decision), hydraulic demonstration of system performance, contaminant mass recovery calculation, system design and performance comparison, statistical evaluation of groundwater quality and preferably, integration of the assessment methods. Applying specific recovery system assessment methods depends upon the type, amount, and quality of data available. Use of an integrated approach is encouraged to evaluate the success of a groundwater recovery and treatment system. The methods presented in this paper are for engineers and corporate management to use when discussing the effectiveness of groundwater remediation systems with their environmental consultant. In addition, an independent (third party) system evaluation is recommended to be sure that a recovery system operates efficiently and with minimum expense.

  15. Performance Appraisal-Management by Objective and Assessment Centre

    Directory of Open Access Journals (Sweden)

    Kai-Ping Huang

    2011-01-01

    Full Text Available Problem statement: Two methods for performance appraisal that are discussed in this study and they are Management By Objective (MBO and Assessment Centre techniques. Employees are appraised for several reasons, the most important of which is to realize the best use of human resources and to plan for future needs; reward and punishment are secondary. Assessment Centre evaluation or appraisal is valuable because it allows a candidate to concentrate on the task at hand. Approach: The literature review and arguments were conducted to provide a systematic discussion of the study. Results: In Management by Objective performance appraisal, employees are obliged to deal with overcoming empirical challenges. In Assessment Centre Appraisal, the different outcomes for particular tasks can be evaluated and management can assess employees relative proficiencies in terms of these tasks. In both forms, consistency in criteria is crucial, for purposes of comparison and standardization. Where comparisons are made with other employees, the criteria need to be parallel for employees at similar levels of responsibility. Conclusion: Differences between organizational cultures will impact on the way that assessment results are received under MBO performance appraisal as well. The outcomes that employees achieve in the tasks provided for appraisal purposes may involve different levels of risk, even within firm guidelines. In the assessment centre, the candidate is separated from colleagues. To make comparative rating assessments, effective MBO will incorporate objective criteria. At times, MBO will be useful in judging change over time for employees performing fairly routine work.

  16. Machine performance assessment and enhancement for a hexapod machine

    Energy Technology Data Exchange (ETDEWEB)

    Mou, J.I. [Arizona State Univ., Tempe, AZ (United States); King, C. [Sandia National Labs., Livermore, CA (United States). Integrated Manufacturing Systems Center

    1998-03-19

    The focus of this study is to develop a sensor fused process modeling and control methodology to model, assess, and then enhance the performance of a hexapod machine for precision product realization. Deterministic modeling technique was used to derive models for machine performance assessment and enhancement. Sensor fusion methodology was adopted to identify the parameters of the derived models. Empirical models and computational algorithms were also derived and implemented to model, assess, and then enhance the machine performance. The developed sensor fusion algorithms can be implemented on a PC-based open architecture controller to receive information from various sensors, assess the status of the process, determine the proper action, and deliver the command to actuators for task execution. This will enhance a hexapod machine`s capability to produce workpieces within the imposed dimensional tolerances.

  17. Performance Analysis of the Capability Assessment Tool for Sustainable Manufacturing

    Directory of Open Access Journals (Sweden)

    Enda Crossin

    2013-08-01

    Full Text Available This paper explores the performance of a novel capability assessment tool, developed to identify capability gaps and associated training and development requirements across the supply chain for environmentally-sustainable manufacturing. The tool was developed to assess 170 capabilities that have been clustered with respect to key areas of concern such as managing energy, water, material resources, carbon emissions and waste as well as environmental management practices for sustainability. Two independent expert teams used the tool to assess a sample group of five first and second tier sports apparel and footwear suppliers within the supply chain of a global sporting goods manufacturer in Asia. The paper addresses the reliability and robustness of the developed assessment method by formulating the expected links between the assessment results. The management practices of the participating suppliers were shown to be closely connected to their performance in managing their resources and emissions. The companies’ initiatives in implementing energy efficiency measures were found to be generally related to their performance in carbon emissions management. The suppliers were also asked to undertake a self-assessment by using a short questionnaire. The large gap between the comprehensive assessment and these in-house self-assessments revealed the suppliers’ misconceptions about their capabilities.

  18. Assessing performance and validating finite element simulations using probabilistic knowledge

    Energy Technology Data Exchange (ETDEWEB)

    Dolin, Ronald M.; Rodriguez, E. A. (Edward A.)

    2002-01-01

    Two probabilistic approaches for assessing performance are presented. The first approach assesses probability of failure by simultaneously modeling all likely events. The probability each event causes failure along with the event's likelihood of occurrence contribute to the overall probability of failure. The second assessment method is based on stochastic sampling using an influence diagram. Latin-hypercube sampling is used to stochastically assess events. The overall probability of failure is taken as the maximum probability of failure of all the events. The Likelihood of Occurrence simulation suggests failure does not occur while the Stochastic Sampling approach predicts failure. The Likelihood of Occurrence results are used to validate finite element predictions.

  19. Work complexity assessment, nursing interventions classification, and nursing outcomes classification: making connections.

    Science.gov (United States)

    Scherb, Cindy A; Weydt, Alice P

    2009-01-01

    When nurses understand what interventions are needed to achieve desired patient outcomes, they can more easily define their practice. Work Complexity Assessment (WCA) is a process that helps nurses to identify interventions performed on a routine basis for their specific patient population. This article describes the WCA process and links it to the Nursing Interventions Classification (NIC) and the Nursing Outcomes Classification (NOC). WCA, NIC, and NOC are all tools that help nurses understand the work they do and the outcomes they achieve, and that thereby acknowledge and validate nursing's contribution to patient care.

  20. PENGEMBANGAN RUBRIK PERFORMANCE ASSESSMENT PADA PRAKTIKUM HIDROLISIS GARAM

    Directory of Open Access Journals (Sweden)

    Nila Puspitasari

    2015-11-01

    Full Text Available This research aims to produce innovation of performance assessment rubric on practicum salt hydrolysis material. The rubric was being consulted and validated by experts, then it was being revised and tested. The trial result was being analyzed and revised, then usage test was given. The research was conducted at SMA in Semarang using purposive sampling technique. A small scale was given to ten students and large scales were given to the students in class XI IPA 3 and XI IPA 4. The results showed that the validity of innovation of performance assessment rubric by experts was 86.46%. Implementation innovation of performance assessment rubric on practicum salt hydrolysis "test salt solution in water", the agreement has been reached between the observer and the student with the value of generalizability coefficient are 0.711 and 0.744. The impact of the use of performance assessment rubric is that the cognitive learning outcomes of the students can achieve mastery learning. In class XI IPA 3, there are 33 students from 38 students achieve KKM and in class XI IPA 4 there are 33 students from 37 students achieve values KKM. Student’s characters can also be developed during lab activities, such as discipline, honesty, independence, curiosity, responsibility, and cooperation. Based on the results, innovation of performance assessment research practicum salt hydrolysis "test salt solution in water" could be used as a guide to the performance assessment (psychomotor of the students and increase understanding of the concept and fosters student’s character.  Keywords : Innovation, Performance Assessment Rubric, Salt Hydrolisis 

  1. Assessment Intervention Using the Rey-Osterrieth Complex Figure Test: A Clinical Illustration.

    Science.gov (United States)

    Sapozhnikova, Anna; Smith, Bruce L

    2016-08-18

    Therapeutic assessment (TA) aims to affect change in a client, in part, through an in vivo intervention using any number of assessment methods during a planned assessment intervention session (AIS). To date, neuropsychological tests have not been widely used in AIS. We suggest that the Rey-Osterrieth Complex Figure Test (RCFT) can be a helpful tool, especially when the assessment questions pertain to cognitive functioning, owing to its complexity and the fact that it taps several different cognitive functions. To illustrate this, we present the case of Mr. B, a 45-year-old man with a childhood history of neglect and abuse who was struggling with mood and cognitive complaints in the context of identifying a satisfying career. His performance on the RCFT had illuminated his cognitive style, and an AIS was built around observing and changing his approach to problem solving in the context of a supportive relationship. Based on the intervention, he was able to reassess his narrative of cognitive dysfunction, address his problems in organization, and practice using another person for support in problem solving.

  2. Comparative Visual Analysis of Structure-Performance Relations in Complex Bulk-Heterojunction Morphologies

    KAUST Repository

    Aboulhassan, A.

    2017-07-04

    The structure of Bulk-Heterojunction (BHJ) materials, the main component of organic photovoltaic solar cells, is very complex, and the relationship between structure and performance is still largely an open question. Overall, there is a wide spectrum of fabrication configurations resulting in different BHJ morphologies and correspondingly different performances. Current state-of-the-art methods for assessing the performance of BHJ morphologies are either based on global quantification of morphological features or simply on visual inspection of the morphology based on experimental imaging. This makes finding optimal BHJ structures very challenging. Moreover, finding the optimal fabrication parameters to get an optimal structure is still an open question. In this paper, we propose a visual analysis framework to help answer these questions through comparative visualization and parameter space exploration for local morphology features. With our approach, we enable scientists to explore multivariate correlations between local features and performance indicators of BHJ morphologies. Our framework is built on shape-based clustering of local cubical regions of the morphology that we call patches. This enables correlating the features of clusters with intuition-based performance indicators computed from geometrical and topological features of charge paths.

  3. An Integrated Knowledge Management Capabilities Framework for Assessing Organizational Performance

    Directory of Open Access Journals (Sweden)

    Abdel Nasser H. Zaied

    2012-03-01

    Full Text Available In the present aggressive world of competition, knowledge management strategies are becoming the major vehicle for the organizations to achieve their goals; to compete and to perform well. Linking knowledge management to business performance could make a strong business case in convincing senior management of any organization about the need to adopt a knowledge management strategy. Organizational performance is, therefore, a key issue and performance measurement models provide a basis for developing a structured approach to knowledge management. In this respect, organizations need to assess their knowledge management capabilities and find ways to improve their performance. This paper takes these issues into account when study the role of knowledge management in enhancing the organizational performance and consequently, developed an integrated knowledge management capabilities framework for assessing organizational performance. The results show that there is positive correlation between knowledge management capabilities and organizational performance. The results also show that the proposed framework can be used to assess organizational performance and also can be used as decision tool to decide which knowledge management capability should be improved.

  4. Assessment of the EEG complexity during activations from sleep.

    Science.gov (United States)

    Chouvarda, I; Rosso, V; Mendez, M O; Bianchi, A M; Parrino, L; Grassi, A; Terzano, M; Cerutti, S

    2011-12-01

    The present study quantitatively analyzes the EEG characteristics during activations (Act) that occur during NREM sleep, and constitute elements of sleep microstructure (i.e. the Cyclic Alternating Pattern). The fractal dimension (FD) and the sample entropy (SampEn) measures were used to study the different sleep stages and the Act that build up the sleep structure. Polysomnographic recordings from 10 good sleepers were analyzed. The complexity indexes of the Act were compared with the non-activation (NAct) periods during non-REM sleep. In addition, complexity measures among the different Act subtypes (A1, A2 and A3) were analyzed. A3 presented a quite similar complexity independently of the sleep stage, while A1 and A2 showed higher complexity in light sleep than during deep sleep. The current results suggest that Act present a hierarchic complexity between subtypes A3 (higher), A2 (intermediate) and A1 (lower) in all sleep stages.

  5. Using Mental Computation Training to Improve Complex Mathematical Performance

    Science.gov (United States)

    Liu, Allison S.; Kallai, Arava Y.; Schunn, Christian D.; Fiez, Julie A.

    2015-01-01

    Mathematical fluency is important for academic and mathematical success. Fluency training programs have typically focused on fostering retrieval, which leads to math performance that does not reliably transfer to non-trained problems. More recent studies have focused on training number understanding and representational precision, but few have…

  6. Performance assessment of heroin and cocaine vapor particle detection systems

    Science.gov (United States)

    Hoglund, David E.; Lucero, Daniel P.

    1994-03-01

    This paper discusses the preparation to assess the performance of heroin and cocaine vapor/particle detection systems. Equipment available commercially and field prototype system equipment will be assessed. Breadboard or brassboard devices or prototype modules will not be assessed. The assessment comprises a performance specifications verification and target response and a controlled field test for equipment available commercially only. Special purpose test procedures, tools, and detection targets were developed to ensure the reproducibility and control of all assessment tests. The sampling equipment parameters and their relative importance and the test procedures and objectives were defined and designed to maximize the information obtained within the test constraints. Test results will be obtained for standardized fundamental representative targets, independent of detection strategy, which can be correlated to a wide range of applications by the potential users. United States Customs Service will not form conclusions regarding the equipment performance for specific applications. It is anticipated the utility of the assessment program will be in availing equipment standardized test results to law enforcement agencies to examine the compatibility of the equipment performance with their requirements, applications, and detection strategy.

  7. Simplified seismic performance assessment and implications for seismic design

    Science.gov (United States)

    Sullivan, Timothy J.; Welch, David P.; Calvi, Gian Michele

    2014-08-01

    The last decade or so has seen the development of refined performance-based earthquake engineering (PBEE) approaches that now provide a framework for estimation of a range of important decision variables, such as repair costs, repair time and number of casualties. This paper reviews current tools for PBEE, including the PACT software, and examines the possibility of extending the innovative displacement-based assessment approach as a simplified structural analysis option for performance assessment. Details of the displacement-based s+eismic assessment method are reviewed and a simple means of quickly assessing multiple hazard levels is proposed. Furthermore, proposals for a simple definition of collapse fragility and relations between equivalent single-degree-of-freedom characteristics and multi-degree-of-freedom story drift and floor acceleration demands are discussed, highlighting needs for future research. To illustrate the potential of the methodology, performance measures obtained from the simplified method are compared with those computed using the results of incremental dynamic analyses within the PEER performance-based earthquake engineering framework, applied to a benchmark building. The comparison illustrates that the simplified method could be a very effective conceptual seismic design tool. The advantages and disadvantages of the simplified approach are discussed and potential implications of advanced seismic performance assessments for conceptual seismic design are highlighted through examination of different case study scenarios including different structural configurations.

  8. Human Navigational Performance in a Complex Network with Progressive Disruptions

    CERN Document Server

    Ramesh, Amitash; Iyengar, Sudarshan; Sekhar, Vinod

    2012-01-01

    The current paper is an investigation towards understanding the navigational performance of humans on a network when the "landmark" nodes are blocked. We observe that humans learn to cope up, despite the continued introduction of blockages in the network. The experiment proposed involves the task of navigating on a word network based on a puzzle called the wordmorph. We introduce blockages in the network and report an incremental improvement in performance with respect to time. We explain this phenomenon by analyzing the evolution of the knowledge in the human participants of the underlying network as more and more landmarks are removed. We hypothesize that humans learn the bare essentials to navigate unless we introduce blockages in the network which would whence enforce upon them the need to explore newer ways of navigating. We draw a parallel to human problem solving and postulate that obstacles are catalysts for humans to innovate techniques to solve a restricted variant of a familiar problem.

  9. Performance Standards': Utility for Different Uses of Assessments

    Directory of Open Access Journals (Sweden)

    Robert L. Linn

    2003-09-01

    Full Text Available Performance standards are arguably one of the most controversial topics in educational measurement. There are uses of assessments such as licensure and certification where performance standards are essential. There are many other uses, however, where performance standards have been mandated or become the preferred method of reporting assessment results where the standards are not essential to the use. Distinctions between essential and nonessential uses of performance standards are discussed. It is argued that the insistence on reporting in terms of performance standards in situations where they are not essential has been more harmful than helpful. Variability in the definitions of proficient academic achievement by states for purposes of the No Child Left Behind Act of 2001 is discussed and it is argued that the variability is so great that characterizing achievement is meaningless. Illustrations of the great uncertainty in standards are provided.

  10. Understanding Self-Assessment as an Informed Process: Residents' Use of External Information for Self-Assessment of Performance in Simulated Resuscitations

    Science.gov (United States)

    Plant, Jennifer L.; Corden, Mark; Mourad, Michelle; O'Brien, Bridget C.; van Schaik, Sandrijn M.

    2013-01-01

    ;Self-directed learning requires self-assessment of learning needs and performance, a complex process that requires collecting and interpreting data from various sources. Learners' approaches to self-assessment likely vary depending on the learner and the context. The aim of this study was to gain insight into how learners process external…

  11. Assessment of the Metrological Performance of Seismic Tables for a QMS Recognition

    Science.gov (United States)

    Silva Ribeiro, A.; Campos Costa, A.; Candeias, P.; Sousa, J. Alves e.; Lages Martins, L.; Freitas Martins, A. C.; Ferreira, A. C.

    2016-11-01

    Seismic testing and analysis using large infrastructures, such as shaking tables and reaction walls, is performed worldwide requiring the use of complex instrumentation systems. To assure the accuracy of these systems, conformity assessment is needed to verify the compliance with standards and applications, and the Quality Management Systems (QMS) is being increasingly applied to domains where risk analysis is critical as a way to provide a formal recognition. This paper describes an approach to the assessment of the metrological performance of seismic shake tables as part of a QMS recognition, with the analysis of a case study of LNEC Seismic shake table.

  12. MYCOBACTERIUM COMPLEX IDENTIFICATION BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY

    Directory of Open Access Journals (Sweden)

    S.A HAWAII

    2001-12-01

    Full Text Available Introduction: There are different ways for identification of Mycobacteria. One of the most sensitive method is HPLC of phenacyl esters of mycolic acids of Mycobacteria for rapid identification of them after their primary cultures. This study uses HPLC for rapid identification and dissociation of Mycobacterium tuberculosis complex. Methods: In this study we use HPLC patterns of mycolic acids for identification three important species of mycobacteria (M. tuberculosis, M. bovis, M. bovis BCG from other mycobacterial species. All the strains were obtained from Tuberculosis and Pulmonary Diseases Research Center. HPLC conditions was as follows: HPLC: Model 1200 Cecil, Column: URP C-18 25X4.6 mm, Detector: U.V variable wave length at 254 nm, Elution: Gradient of methanol/chloroform. Flow rate: 2.5 ml/min. Results: HPLC leads to obtaining chromatograms which on its X-axis retention times (of different peaks which exist in the sample and on its Y-axis U.V absorbance (of these peaks were drown. These chromatograms in M. bovis and M. tuberculosis samples are similar with each other but differs from BCG ones. Discussion: On the basis of different retention times and numbers of the peaks which present in each chromatogram, we can differentiate between M. bovis, M. tuberculosis and BCG from other Mycobacteria. Also, with this method we can identify BCG from M. bovis and M. tuberculosis (because BCG has 9 and M. bovis and M. tuberculosis has 7 characteristic peaks in their chromatograms.

  13. 42 CFR 493.1403 - Condition: Laboratories performing moderate complexity testing; laboratory director.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 5 2010-10-01 2010-10-01 false Condition: Laboratories performing moderate complexity testing; laboratory director. 493.1403 Section 493.1403 Public Health CENTERS FOR MEDICARE... LABORATORY REQUIREMENTS Personnel for Nonwaived Testing Laboratories Performing Moderate Complexity...

  14. White paper updating conclusions of 1998 ILAW performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    MANN, F.M.

    2000-05-11

    The purpose of this document is to provide a comparison of the estimated immobilized low-activity waste (LAW) disposal system performance against established performance objectives using the beat estimates for parameters and models to describe the system. The principal advances in knowledge since the last performance assessment (known as the 1998 ILAW PA [Mann 1998a]) have been in site specific information and data on the waste form performance for BNFL, Inc. relevant glass formulations. The white paper also estimates the maximum release rates for technetium and other key radionuclides and chemicals from the waste form. Finally, this white paper provides limited information on the impact of changes in waste form loading.

  15. Significance of Attaining Users’ Feedback in Building Performance Assessment

    Directory of Open Access Journals (Sweden)

    Khalil Natasha

    2014-01-01

    Full Text Available Generally, building is a structure that provides basic shelter for the humans to conduct general activities. In common prose, the purpose of buildings is to provide humans a comfortable working and living space and protected from the extremes of climate. However, a building usage is depends on the lifespan and the change of rate effected on their impact on efficiency of use. Hence, more attention needs to be emphasized on the performance of buildings as the changes are not static over time. This paper highlights the concept and requirements in evaluating building performance. Exploration on the concept of building performance is also addressed on the purposes of building performance and the link of performance towards the end-users and incorporating their feedback. It concludes that obtaining users’ feedback is vital in building performance and the requirements of assessment must outline the performance criteria and mandates in such building.

  16. SKI SITE-94. Deep Repository Performance Assessment Project. Summary

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-02-01

    The function of SITE-94 is to provide the Swedish Nuclear Power Inspectorate (SKI) with the capacity and supporting knowledge needed for reviewing the Swedish nuclear industry`s R and D programs and for reviewing license applications, as stipulated in Swedish legislation. The report is structured as a Performance Assessment exercise needed for input to decisions regarding repository safety, but the SITE-94 is neither a safety assessment nor a model for future assessments to be undertaken by the prospective licensee. The specific project objectives of SITE-94 comprise site evaluation, performance assessment methodology, canister integrity and radionuclide release and transport calculations. The main report (SKI-R--96-36) gives a detailed description of the many inter-related studies undertaken as part of the research project, while the present report presents a condensed summary of the main report. 46 refs.

  17. Environmental value engineering (EVE): a green building performance assessment methodology

    Energy Technology Data Exchange (ETDEWEB)

    Roudebush, W. H. [Bowling Green Univ., College of Technology, OH (United States)

    1998-11-01

    Establishing criteria for assessing green building performance is discussed. Performance criteria identified include building energy consumption, building material reduction, pollution minimization, indoor air quality, waste reduction, and occupant performance/output maximization. This paper specifically focuses on the use of an assessment methodology called environmental value engineering to maximize building performance at the least cost to the environment, i.e. the least quantity of inputs required per unit of building function. The inputs are grouped into four categories of: environment, fuel energy, goods, and services. The assessment is conducted at various points in the building`s life cycle (natural resource formation, exploration and extraction, material production, construction, use, demolition, natural resource recycling and disposal), with the four categories of inputs accounted for during each of the life cycle phases. Environmental value engineering is based on the EMERGY Analysis methodology developed at the University of Florida, and the ASTM (1993) UNIFORMAT of building subsystem organization. Total EMERGY per unit of function is considered to be the measure of building performance. The methodology can be used to compare traditional building performance to green building performance towards sustainable development. 5 refs., 2 tabs.

  18. DEVELOPING WEB-BASED PERFORMANCE ASSESSMENT IN INTEGRATED SCIENCE COURSE

    Directory of Open Access Journals (Sweden)

    S. Wahyuni

    2015-04-01

    Full Text Available This research aims to develop a web-based performance assessment in Integrated Science course. The research was Research and Development (R & D. The expert validation of developed products resulted the average percentage of 3.88 for content category, 3.94 for format category, and 3.78 for language category. Meanwhile, critical thinking skill aspect resulted percentage of 92.20 basic clarification indicators, 90.05 for basic for the decision category, and 94.67 for inference category. Students also responded positively to web-based performance assessment in Integrated Science course.

  19. Operational energy performance assessment system of municipal wastewater treatment plants.

    Science.gov (United States)

    Yang, Lingbo; Zeng, Siyu; Chen, Jining; He, Miao; Yang, Wan

    2010-01-01

    Based on the statistical analysis of operational energy consumption and its influential factors from data of 599 Chinese WWTPs in 2006, it is noticed that the most influential factors include treatment technology adopted, treated sewage amount, removed pollutants amount, etc. Using the conclusion above, this paper sets up an integrated system of operational energy performance assessment for municipal wastewater treatment plants. Combining with result from on-spot research and model simulation, the calculating method of benchmark value and score of 7 energy efficiency indicators grouped into 3 levels is stated. Applying the assessment system to three plants, its applicability and objectivity are proved and suggestions to improve energy performance are provided.

  20. Performance of a nonempirical density functional on molecules and hydrogen-bonded complexes.

    Science.gov (United States)

    Mo, Yuxiang; Tian, Guocai; Car, Roberto; Staroverov, Viktor N; Scuseria, Gustavo E; Tao, Jianmin

    2016-12-21

    Recently, Tao and Mo derived a meta-generalized gradient approximation functional based on a model exchange-correlation hole. In this work, the performance of this functional is assessed on standard test sets, using the 6-311++G(3df,3pd) basis set. These test sets include 223 G3/99 enthalpies of formation, 99 atomization energies, 76 barrier heights, 58 electron affinities, 8 proton affinities, 96 bond lengths, 82 harmonic vibrational frequencies, 10 hydrogen-bonded molecular complexes, and 22 atomic excitation energies. Our calculations show that the Tao-Mo functional can achieve high accuracy for most properties considered, relative to the local spin-density approximation, Perdew-Burke-Ernzerhof, and Tao-Perdew-Staroverov-Scuseria functionals. In particular, it yields the best accuracy for proton affinities, harmonic vibrational frequencies, hydrogen-bond dissociation energies and bond lengths, and atomic excitation energies.

  1. Performance of a nonempirical density functional on molecules and hydrogen-bonded complexes

    Science.gov (United States)

    Mo, Yuxiang; Tian, Guocai; Car, Roberto; Staroverov, Viktor N.; Scuseria, Gustavo E.; Tao, Jianmin

    2016-12-01

    Recently, Tao and Mo derived a meta-generalized gradient approximation functional based on a model exchange-correlation hole. In this work, the performance of this functional is assessed on standard test sets, using the 6-311++G(3df,3pd) basis set. These test sets include 223 G3/99 enthalpies of formation, 99 atomization energies, 76 barrier heights, 58 electron affinities, 8 proton affinities, 96 bond lengths, 82 harmonic vibrational frequencies, 10 hydrogen-bonded molecular complexes, and 22 atomic excitation energies. Our calculations show that the Tao-Mo functional can achieve high accuracy for most properties considered, relative to the local spin-density approximation, Perdew-Burke-Ernzerhof, and Tao-Perdew-Staroverov-Scuseria functionals. In particular, it yields the best accuracy for proton affinities, harmonic vibrational frequencies, hydrogen-bond dissociation energies and bond lengths, and atomic excitation energies.

  2. Performance of a Nonempirical Density Functional on Molecules and Hydrogen-Bonded Complexes

    CERN Document Server

    Mo, Yuxiang; Car, Roberto; Staroverov, Viktor N; Scuseria, Gustavo E; Tao, Jianmin

    2016-01-01

    Recently, Tao and Mo (TM) derived a new meta-generalized gradient approximation based on a model exchange hole. In this work, the performance of this functional is assessed on standard test sets, using the 6-311++G(3df,3pd) basis set. These test sets include 223 G3/99 enthalpies of formation, 58 electron affinities, 8 proton affinities, 96 bond lengths, 82 harmonic vibrational frequencies, and 10 hydrogen-bonded molecular complexes. Our calculations show that the TM functional can achieve remarkable accuracy for most molecular properties, improving upon non-empirical density functionals considered here. In particular, it delivers the best accuracy for proton affinities, harmonic vibrational frequencies, and hydrogen-bonded dissociation energies and bond lengths, compared to other semilocal density-functional approximations considered in this work.

  3. Vulnerability Assessment for a Complex Structure Using Vibration Response Induced by Impact Load

    Energy Technology Data Exchange (ETDEWEB)

    Park, Jeongwon; Park, Junhong [Hanyang University, Seoul (Korea, Republic of); Koo, Man Hoi [Agency for Defense Development, Daejeon (Korea, Republic of)

    2014-10-15

    This work presents a vulnerability assessment procedure for a complex structure using vibration characteristics. The structural behavior of a three-dimensional framed structure subjected to impact forces was predicted using the spectral element method. The Timoshenko beam function was applied to simulate the impact wave propagations induced by a high-velocity projectile at relatively high frequencies. The interactions at the joints were analyzed for both flexural and longitudinal wave propagations. Simulations of the impact energy transfer through the entire structure were performed using the transient displacement and acceleration responses obtained from the frequency analysis. The kill probabilities of the crucial components for an operating system were calculated as a function of the predicted acceleration amplitudes according to the acceptable vibration levels. Following the proposed vulnerability assessment procedure, the vulnerable positions of a three-dimensional combat vehicle with high possibilities of damage generation of components by impact loading were identified from the estimated vibration responses.

  4. Students' Views of Oral Performance Assessment in Mathematics: Straddling the "Assessment of" and "Assessment for" Learning Divide

    Science.gov (United States)

    Iannone, Paola; Simpson, Adrian

    2015-01-01

    This paper explores the views of a group of students who took an oral performance assessment in a first-year mathematics module. Such assessments are unusual for most subjects in the UK, but particularly within the generally homogenous assessment diet of undergraduate mathematics. The evidence presented here resonates with some, but not all, of…

  5. Assessing the Value of UAV Photogrammetry for Characterizing Terrain in Complex Peatlands

    Directory of Open Access Journals (Sweden)

    Julie Lovitt

    2017-07-01

    Full Text Available Microtopographic variability in peatlands has a strong influence on greenhouse gas fluxes, but we lack the ability to characterize terrain in these environments efficiently over large areas. To address this, we assessed the capacity of photogrammetric data acquired from an unmanned aerial vehicle (UAV or drone to reproduce ground elevations measured in the field. In particular, we set out to evaluate the role of (i vegetation/surface complexity and (ii supplementary LiDAR data on results. We compared remote-sensing observations to reference measurements acquired with survey grade GPS equipment at 678 sample points, distributed across a 61-hectare treed bog in northwestern Alberta, Canada. UAV photogrammetric data were found to capture elevation with accuracies, by root mean squares error, ranging from 14–42 cm, depending on the state of vegetation/surface complexity. We judge the technology to perform well under all but the most-complex conditions, where ground visibility is hindered by thick vegetation. Supplementary LiDAR data did not improve results significantly, nor did it perform well as a stand-alone technology at the low densities typically available to researchers.

  6. Performance Assessment of Product Service System from System Architecture Perspectives

    Directory of Open Access Journals (Sweden)

    John P. T. Mo

    2012-01-01

    Full Text Available New business models in complex engineering products have favoured the integration of acquisition and sustainment phases in capability development. The product service system (PSS concept enables manufacturers of complex engineering products to incorporate support services into the product’s manufacturing and sustainment lifecycle. However, the PSS design has imposed significant risks to the manufacturer not only in the manufacture of the product itself, but also in the provision of support services over long period of time at a predetermined price. This paper analysed three case studies using case study research design approach and mapped the service elements of the case studies to the generic complex engineering product service system (CEPSS model. By establishing the concept of capability distribution for a PSS enterprise, the capability of the CEPSS can be overlaid on the performance-based reward scheme so that decision makers evaluate options related to the business opportunities presented to them.

  7. THE NEED AND OPPORTUNITIES FOR PERFORMANCE ASSESSMENT IN HIGHER EDUCATION

    Directory of Open Access Journals (Sweden)

    Gabriella KECZER

    2007-01-01

    Full Text Available Motivating employees is one of the highly important areas of human resources management (HRM. As people are best motivated by their intention to satisfy their own needs, the task of HRM is to satisfy the employees’ need for remuneration in a fair and just manner. This can be achieved if an organization operates a formal and professional system of performance assessment. The importance of having such a system in place is further confirmed by the fact that six out of the seven large Hungarian corporations reviewed operate a global system of performance assessment. In areas where intellectual activity plays a dominant role, as is the case with higher education, omitting an evaluation of the performance of „white collar workers” is, of course, out of the question. Satisfying the employees’ need for fair remuneration in the public sphere, including higher education (HE, is essentially hindered by a lack of evaluating individual performance and, hence, performance-dependent wages and financial benefits derived from extra performance. Given the centrally determined and uniform wage schedule, there is almost no opportunity to differentiate between the performance of one person in a given wage category and another. This entails, at least for a large part of public employees and public servants, a lack of drive to perform better than average. These people could be forced to make greater efforts only by way of measuring their performance on an individual basis and applying a wage system that would rely on individual output and represent a system of wages that would be both differentiated and motivating. In the first part of my paper, I will present the performance assessment methods applied by the large Hungarian enterprises included in the investigation. The second part will deal with the issue of how all of this can be actually implemented in HE.

  8. Automated Performance Monitoring and Assessment for DCS Digital Systems.

    Science.gov (United States)

    1977-10-01

    eye opening monitor performance assessment techniques. (3) Implement and program a CPMAS test processor subsystem. (4) Perform a field test site...an internodal path in the planned DEB network is 11 ( Hillingdon to Schoenfeld). For this reason, the path from Node A to Node B in the Transmission...RADIOS SITE RADIOS HOHENSTADT 4 BANN 6 STUTTGART 4 HILLINGDON 3 LANGERKOPF 5 CROUGHTON 4 DONNERSBERG 10 MARTLESHAM HEATH 3 PIRMASENS 4 ADENAU 3

  9. The balanced scorecard: sustainable performance assessment for forensic laboratories.

    Science.gov (United States)

    Houck, Max; Speaker, Paul J; Fleming, Arron Scott; Riley, Richard A

    2012-12-01

    The purpose of this article is to introduce the concept of the balanced scorecard into the laboratory management environment. The balanced scorecard is a performance measurement matrix designed to capture financial and non-financial metrics that provide insight into the critical success factors for an organization, effectively aligning organization strategy to key performance objectives. The scorecard helps organizational leaders by providing balance from two perspectives. First, it ensures an appropriate mix of performance metrics from across the organization to achieve operational excellence; thereby the balanced scorecard ensures that no single or limited group of metrics dominates the assessment process, possibly leading to long-term inferior performance. Second, the balanced scorecard helps leaders offset short term performance pressures by giving recognition and weight to long-term laboratory needs that, if not properly addressed, might jeopardize future laboratory performance.

  10. A rater training protocol to assess team performance.

    Science.gov (United States)

    Eppich, Walter; Nannicelli, Anna P; Seivert, Nicholas P; Sohn, Min-Woong; Rozenfeld, Ranna; Woods, Donna M; Holl, Jane L

    2015-01-01

    Simulation-based methodologies are increasingly used to assess teamwork and communication skills and provide team training. Formative feedback regarding team performance is an essential component. While effective use of simulation for assessment or training requires accurate rating of team performance, examples of rater-training programs in health care are scarce. We describe our rater training program and report interrater reliability during phases of training and independent rating. We selected an assessment tool shown to yield valid and reliable results and developed a rater training protocol with an accompanying rater training handbook. The rater training program was modeled after previously described high-stakes assessments in the setting of 3 facilitated training sessions. Adjacent agreement was used to measure interrater reliability between raters. Nine raters with a background in health care and/or patient safety evaluated team performance of 42 in-situ simulations using post-hoc video review. Adjacent agreement increased from the second training session (83.6%) to the third training session (85.6%) when evaluating the same video segments. Adjacent agreement for the rating of overall team performance was 78.3%, which was added for the third training session. Adjacent agreement was 97% 4 weeks posttraining and 90.6% at the end of independent rating of all simulation videos. Rater training is an important element in team performance assessment, and providing examples of rater training programs is essential. Articulating key rating anchors promotes adequate interrater reliability. In addition, using adjacent agreement as a measure allows differentiation between high- and low-performing teams on video review. © 2015 The Alliance for Continuing Education in the Health Professions, the Society for Academic Continuing Medical Education, and the Council on Continuing Medical Education, Association for Hospital Medical Education.

  11. Complex health care interventions: Characteristics relevant for ethical analysis in health technology assessment.

    Science.gov (United States)

    Lysdahl, Kristin Bakke; Hofmann, Bjørn

    2016-01-01

    Complexity entails methodological challenges in assessing health care interventions. In order to address these challenges, a series of characteristics of complexity have been identified in the Health Technology Assessment (HTA) literature. These characteristics are primarily identified and developed to facilitate effectiveness, safety, and cost-effectiveness analysis. However, ethics is also a constitutive part of HTA, and it is not given that the conceptions of complexity that appears relevant for effectiveness, safety, and cost-effectiveness analysis are also relevant and directly applicable for ethical analysis in HTA. The objective of this article is therefore to identify and elaborate a set of key characteristics of complex health care interventions relevant for addressing ethical aspects in HTA. We start by investigating the relevance of the characteristics of complex interventions, as defined in the HTA literature. Most aspects of complexity found to be important when assessing effectiveness, safety, and efficiency turn out also to be relevant when assessing ethical issues of a given health technology. However, the importance and relevance of the complexity characteristics may differ when addressing ethical issues rather than effectiveness. Moreover, the moral challenges of a health care intervention may themselves contribute to the complexity. After identifying and analysing existing conceptions of complexity, we synthesise a set of five key characteristics of complexity for addressing ethical aspects in HTA: 1) multiple and changing perspectives, 2) indeterminate phenomena, 3) uncertain causality, 4) unpredictable outcome, and 5) ethical complexity. This may serve as an analytic tool in addressing ethical issues in HTA of complex interventions.

  12. Assessment of Innovation and Performance in the Fruit Chain; The Innovation-Performance Matrix

    NARCIS (Netherlands)

    Trienekens, J.H.; Uffelen, van R.L.M.; Debaire, J.; Omta, S.W.F.

    2008-01-01

    Purpose - This paper aims to bridge the concepts of innovation and performance and to develop a framework to assess innovation and performance in food chains. Design/methodology/approach - Based on an extensive literature search the paper identifies critical success factors (CSFs) and related

  13. Perspectives to Performance of Environment and Health Assessments and Models—From Outputs to Outcomes?

    Directory of Open Access Journals (Sweden)

    Jouni T. Tuomisto

    2013-06-01

    Full Text Available The calls for knowledge-based policy and policy-relevant research invoke a need to evaluate and manage environment and health assessments and models according to their societal outcomes. This review explores how well the existing approaches to assessment and model performance serve this need. The perspectives to assessment and model performance in the scientific literature can be called: (1 quality assurance/control, (2 uncertainty analysis, (3 technical assessment of models, (4 effectiveness and (5 other perspectives, according to what is primarily seen to constitute the goodness of assessments and models. The categorization is not strict and methods, tools and frameworks in different perspectives may overlap. However, altogether it seems that most approaches to assessment and model performance are relatively narrow in their scope. The focus in most approaches is on the outputs and making of assessments and models. Practical application of the outputs and the consequential outcomes are often left unaddressed. It appears that more comprehensive approaches that combine the essential characteristics of different perspectives are needed. This necessitates a better account of the mechanisms of collective knowledge creation and the relations between knowledge and practical action. Some new approaches to assessment, modeling and their evaluation and management span the chain from knowledge creation to societal outcomes, but the complexity of evaluating societal outcomes remains a challenge.

  14. Complex Situational Tasks in Assessment of Educational Outcomes in “Psychological Assessment of Students” Module of the Master’s Programme in School Psychology

    Directory of Open Access Journals (Sweden)

    Andruschenko T.Y.,

    2016-12-01

    Full Text Available The paper discusses the content of midterm performance evaluation of graduate students within the “Psychological Assessment” module of the master’s programme in School Psychology and focuses on the logic of the module’s design in relation to the professional standard in Educational Psychology. Complex situational tasks are considered in the modular program as the main means of assessing educational outcomes. The content of these tasks is determined by a range of diagnostic situations and closely corresponds with the real-life practice of educational psychologists. Setting complex situational tasks is related to a number of components of the educational psychologist’s professional activity in the field of psychological assessment, such as: planning the sequence of professional actions; ensuring the methodological background for assessment; taking into account deontological aspects of communication with assessed individuals; carrying out professional actions; reflecting on the process and outcomes of assessment. The paper analyses the place and role of graduate students’ self-assessment in finding solutions to complex situational tasks and offers a description of one such task that can be used in midterm performance evaluation of graduate students.

  15. Organizational Performance Assessment: Overview of Publications in National Journals

    Directory of Open Access Journals (Sweden)

    Sandra Mara Iesbik Valmorbida

    2012-12-01

    Full Text Available In the literature there are several tools that aim to assess organizational performance, such as Balanced Scorecard (BSC, National Quality Award (PNQ, Multicriteria Methodology for Decision Aiding (MCDA, Data envelopment analysis (DEA, Analytic Hierarchy Process (AHP, among others. However, it is perceived in practice doubts as to choose the most appropriate for each organizational context. In this sense, it is argued that to measure the performance of the organization it is necessary that this measure is based on an instrument that allows transparency in the evaluation form, and insert those interested in the evaluation process. The credibility of an evaluation therefore depends on the ability to produce consistent information for all subjects involved in the intervention. The search for tools to improve the way to evaluate organizational performance it is increasingly necessary. The objective of this study is to identify the main tools of organizational performance assessment published in national journals in the area of Administration, Accounting and Tourism, classified by CAPES Qualis A1 to B5. The study is characterized as descriptive and qualitative documentation. We analyzed 489 articles, which resulted in the following results:(i identified the main theme of the authors and regular assessment of organizational performance, (ii from the year 2000 publications on the subject grew substantially, (iii Data Envelopment Analysis (DEA, Balanced Scorecard (BSC and Multicriteria for decision aiding methodology(MCDA-C are the most commonly used tools for evaluating performance, (iv most of the tools found in the literature are multiple criteria, (v described the process used by the tools to assess organizational performance.

  16. Counselor Competence, Performance Assessment, and Program Evaluation: Using Psychometric Instruments

    Science.gov (United States)

    Tate, Kevin A.; Bloom, Margaret L.; Tassara, Marcel H.; Caperton, William

    2014-01-01

    Psychometric instruments have been underutilized by counselor educators in performance assessment and program evaluation efforts. As such, we conducted a review of the literature that revealed 41 instruments fit for such efforts. We described and critiqued these instruments along four dimensions--"Target Domain," "Format,"…

  17. Measuring the Impact of Rater Negotiation in Writing Performance Assessment

    Science.gov (United States)

    Trace, Jonathan; Janssen, Gerriet; Meier, Valerie

    2017-01-01

    Previous research in second language writing has shown that when scoring performance assessments even trained raters can exhibit significant differences in severity. When raters disagree, using discussion to try to reach a consensus is one popular form of score resolution, particularly in contexts with limited resources, as it does not require…

  18. Quality of Feedback Following Performance Assessments: Does Assessor Expertise Matter?

    Science.gov (United States)

    Govaerts, Marjan J. B.; van de Wiel, Margje W. J.; van der Vleuten, Cees P. M.

    2013-01-01

    Purpose: This study aims to investigate quality of feedback as offered by supervisor-assessors with varying levels of assessor expertise following assessment of performance in residency training in a health care setting. It furthermore investigates if and how different levels of assessor expertise influence feedback characteristics.…

  19. Counselor Competence, Performance Assessment, and Program Evaluation: Using Psychometric Instruments

    Science.gov (United States)

    Tate, Kevin A.; Bloom, Margaret L.; Tassara, Marcel H.; Caperton, William

    2014-01-01

    Psychometric instruments have been underutilized by counselor educators in performance assessment and program evaluation efforts. As such, we conducted a review of the literature that revealed 41 instruments fit for such efforts. We described and critiqued these instruments along four dimensions--"Target Domain," "Format,"…

  20. Science Rocks! A Performance Assessment for Earth Science

    Science.gov (United States)

    Waters, Melia; Straits, William

    2008-01-01

    This article presents an activity in which students pool their knowledge and creativity to make a song presenting what they have learned in a unit on the rock cycle. This highly motivating, integrated performance assessment incorporates multiple intelligences, reinforces learning, and is a student favorite in the elementary and middle grades.

  1. Data farming in support of HLA performance assessment

    NARCIS (Netherlands)

    Cramp, A.J.; Berg, T.W. van den; Huiskamp, W.

    2014-01-01

    Performance assessment is a key factor in designing distributed simulation environments that are fit-forpurpose and cost-effective. Simulations used for training applications should provide the required level of responsiveness and interactivity. Simulations used for analysis or decision support shou

  2. Teachers, Micro-Credentials, and the Performance Assessment Movement

    Science.gov (United States)

    French, Dan; Berry, Barnett

    2017-01-01

    Micro-credentials, a new form of personalized professional development for teachers, offer a unique solution to the challenge of training school staff to design and implement performance assessments. In a relatively short period of time, micro-credentials have shown promise in enabling a more personalized, effective method of promoting teacher…

  3. Optimal Designs for Performance Assessments: The Subject Factor.

    Science.gov (United States)

    Parkes, Jay

    Much speculation abounds concerning how expensive performance assessments are or are going to be. Recent projections indicate that, in order to achieve an acceptably high generalizability coefficient, many additional tasks may need to be added, which will enlarge costs. Such projections are, to some degree, correct, and to some degree simplistic.…

  4. The Neglected Situation: Assessment Performance and Interaction in Context

    Science.gov (United States)

    Maddox, Bryan

    2015-01-01

    Informed by Goffman's influential essay on "The neglected situation" this paper examines the contextual and interactive dimensions of performance in large-scale educational assessments. The paper applies Goffman's participation framework and associated theory in linguistic anthropology to examine how testing situations are framed and…

  5. Assessment of daily-life reaching performance after stroke

    NARCIS (Netherlands)

    van Meulen, Fokke; Reenalda, Jasper; Buurke, Jaap; Veltink, Petrus H.

    For an optimal guidance of the rehabilitation therapy of stroke patients in an in-home setting, objective, and patient-specific performance assessment of arm movements is needed. In this study, metrics of hand movement relative to the pelvis and the sternum were estimated in 13 stroke subjects using

  6. Expertise in Performance Assessment: Assessors' Perspectives

    Science.gov (United States)

    Berendonk, Christoph; Stalmeijer, Renée E.; Schuwirth, Lambert W. T.

    2013-01-01

    The recent rise of interest among the medical education community in individual faculty making subjective judgments about medical trainee performance appears to be directly related to the introduction of notions of integrated competency-based education and assessment for learning. Although it is known that assessor expertise plays an important…

  7. Teacher Performance Assessment Instruments: Plans for Practice Rating.

    Science.gov (United States)

    Capie, William; And Others

    This manual consists of lesson plans developed to train data collectors in the use of the Teacher Performance Assessment Instruments (TPAI). Each set of plans was designed for one of three purposes. Lesson plans developed for the Teaching Plans and Materials Instrument (TPM) simulate a portfolio prepared by the teacher. One-day plans developed for…

  8. The Neglected Situation: Assessment Performance and Interaction in Context

    Science.gov (United States)

    Maddox, Bryan

    2015-01-01

    Informed by Goffman's influential essay on "The neglected situation" this paper examines the contextual and interactive dimensions of performance in large-scale educational assessments. The paper applies Goffman's participation framework and associated theory in linguistic anthropology to examine how testing situations are framed and…

  9. Personnel Performance Assessment in Information Systems Outsourcing Environments

    Science.gov (United States)

    Casado-Lumbreras, Cristina; Soto-Acosta, Pedro; Colomo-Palacios, Ricardo; de Pablos, Patricia Ordonez

    2011-01-01

    Purpose: The aim of this paper is to present a tool which uses semantic technologies for personnel performance and workplace learning assessment in outsourced information technology environments. Design/methodology/approach: The paper presents the tool from a technical perspective and introduces a use case that depicts the main features related to…

  10. Personnel Performance Assessment in Information Systems Outsourcing Environments

    Science.gov (United States)

    Casado-Lumbreras, Cristina; Soto-Acosta, Pedro; Colomo-Palacios, Ricardo; de Pablos, Patricia Ordonez

    2011-01-01

    Purpose: The aim of this paper is to present a tool which uses semantic technologies for personnel performance and workplace learning assessment in outsourced information technology environments. Design/methodology/approach: The paper presents the tool from a technical perspective and introduces a use case that depicts the main features related to…

  11. Performance assessment in the maternity pathway in Tuscany region.

    Science.gov (United States)

    Nuti, Sabina; Bonini, Anna; Murante, Anna Maria; Vainieri, Milena

    2009-08-01

    The paper describes the performance measurement system of the maternity pathway used in Tuscany by health care professionals, general managers and regional policy-makers. This system uses 19 indicators grouped in six dimensions: population's state of health; compliance with regional guidelines; efficiency and financial performance; clinical and health assessment; patient satisfaction; and employees' satisfaction. The results are represented on a spider diagram that summarizes the results on the different dimensions. The Tuscan performance measurement system of the maternity pathway has been used to identify best practice within, and their adoption throughout, the Tuscan public health care system.

  12. Online performance assessment of heat exchanger using artificial neural networks

    Directory of Open Access Journals (Sweden)

    C. Ahilan, S. Kumanan, N. Sivakumaran

    2011-09-01

    Full Text Available Heat exchanger is a device in which heat is transferred from one medium to another across a solid surface. The performance of heat exchanger deteriorates with time due to fouling on the heat transfer surface. It is necessary to assess periodically the heat exchanger performance, in order to maintain at high efficiency level. Industries follow adopted practices to monitor but it is limited to some degree. Online monitoring has an advantage to understand and improve the heat exchanger performance. In this paper, online performance monitoring system for shell and tube heat exchanger is developed using artificial neural networks (ANNs. Experiments are conducted based on full factorial design of experiments to develop a model using the parameters such as temperatures and flow rates. ANN model for overall heat transfer coefficient of a design/ clean heat exchanger system is developed using a feed forward back propagation neural network and trained. The developed model is validated and tested by comparing the results with the experimental results. This model is used to assess the performance of heat exchanger with the real/fouled system. The performance degradation is expressed using fouling factor (FF, which is derived from the overall heat transfer coefficient of design system and real system. It supports the system to improve the performance by asset utilization, energy efficient and cost reduction interms of production loss.

  13. Total-System Performance Assessment for the Yucca Mountain Site

    Energy Technology Data Exchange (ETDEWEB)

    M.L. Wilson

    2001-12-13

    Yucca Mountain, Nevada, is under consideration as a potential site for a repository for high-level radioactive waste. Total-system performance-assessment simulations are performed to evaluate the safety of the site. Features, events, and processes have been systematically evaluated to determine which ones are significant to the safety assessment. Computer models of the disposal system have been developed within a probabilistic framework, including both engineered and natural components. Selected results are presented for three different total-system simulations, and the behavior of the disposal system is discussed. The results show that risk is dominated by igneous activity at early times, because the robust waste-package design prevents significant nominal (non-disruptive) releases for tens of thousands of years or longer. The uncertainty in the nominal performance is dominated by uncertainties related to waste-package corrosion at early times and by uncertainties in the natural system, most significantly infiltration, at late times.

  14. Environmental performance assessment of a company of aluminum surface treatment

    Directory of Open Access Journals (Sweden)

    Susan Catieri Ramalho

    2013-08-01

    Full Text Available The purpose of this article was to evaluate the environmental performance of a medium-sized company that provides services for surface treatment of aluminum. The treatment is known as anodizing. The research method was qualitative numerical modeling. The environmental performance of the company was organized into five constructs: atmosphere, wastewater, energy and natural resources, solid waste, and legislation and management. Nineteen indicators were chosen to explain the five constructs. Ten employees of the company prioritized the constructs and evaluated the situation of the indicators by means of a scale of assessment. By means of a mathematical model, the general performance of the environmental operation was calculated at 74.5% of the maximum possible. The indicators that most contributed to the performance not to reach 100% were consumption of electricity and water consumption. The construct of worse performance was natural and energy resources. These are the priorities for future environmental improvement actions that the company may promote.

  15. Hardware performance assessment recommendations and tools for baropodometric sensor systems

    Directory of Open Access Journals (Sweden)

    Claudia Giacomozzi

    2010-06-01

    Full Text Available Accurate plantar pressure measurements are mandatory in both clinical and research contexts. Differences in accuracy, precision, reliability of pressure measurement devices (PMDs prevented so far the onset of standardization processes and of reliable reference datasets. The Italian National Institute of Health (ISS approved and conducted a scientific project aimed to design, validate and implement dedicated testing methods for both in-factory and on-the-field PMD assessment. A general-purpose experimental set-up was built, complete and suitable for the assessment of PMDs based on different sensor technology, electronic conditioning and mechanical solutions. Preliminary assessments have been conducted on 5 commercial PMDs. The study lead to the definition of: i an appropriate set of instruments and procedures for PMD technical assessment; ii a minimum set of significant parameters for the technical characterization of the PMD performance; iii some recommendations to both manufacturers and end users for an appropriate use in clinics and in research context

  16. Drawing students' attention to relevant assessment criteria: effects on self-assessment skills and performance

    NARCIS (Netherlands)

    Fastré, Greet; Van der Klink, Marcel; Sluijsmans, Dominique; Van Merriënboer, Jeroen

    2012-01-01

    Fastré, G. M. J., Van der Klink, M. R., Sluijsmans, D., & Van Merriënboer, J. J. G. (2012). Drawing students’ attention to relevant assessment criteria: effects on self-assessment skills and performance. Journal of Vocational Education & Training, 64(2), 185-198. doi:10.1080/13636820.2011.630537

  17. Performance Assessment Modeling and Sensitivity Analyses of Generic Disposal System Concepts.

    Energy Technology Data Exchange (ETDEWEB)

    Sevougian, S. David; Freeze, Geoffrey A.; Gardner, William Payton; Hammond, Glenn Edward; Mariner, Paul

    2014-09-01

    directly, rather than through simplified abstractions. It also a llows for complex representations of the source term, e.g., the explicit representation of many individual waste packages (i.e., meter - scale detail of an entire waste emplacement drift). This report fulfills the Generic Disposal System Analysis Work Packa ge Level 3 Milestone - Performance Assessment Modeling and Sensitivity Analyses of Generic Disposal System Concepts (M 3 FT - 1 4 SN08080 3 2 ).

  18. Consideration of liners and covers in performance assessments

    Energy Technology Data Exchange (ETDEWEB)

    Phifer, Mark A. [Savannah River National Laboratory, Aiken, SC (United States); Seitz, Robert R. [Savannah River National Laboratory, Aiken, SC (United States); Suttora, Linda C. [USDOE Enviromental Management, Washington, DC (United States)

    2014-09-18

    On-site disposal cells are in use and being considered at several United States Department of Energy (USDOE) sites as the final disposition for large amounts of waste associated with cleanup of contaminated areas and facilities. These disposal cells are typically regulated by States and/or the U.S. Environmental Protection Agency under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) in addition to having to comply with requirements in DOE Order 435.1, Radioactive Waste Management due to the radioactive waste. The USDOE-Environmental Management Office of Site Restoration formed a working group to foster improved communication and sharing of information for personnel associated with these CERCLA disposal cells and work towards more consistent assumptions, as appropriate, for technical and policy considerations related to CERCLA risk assessments and DOE Order 435.1 performance assessments in support of a Record of Decision and Disposal Authorization Statement, respectively. One of the issues considered by the working group, which is addressed in this report, was how to appropriately consider the performance of covers and liners/leachate collections systems in the context of a DOE Order 435.1 performance assessment (PA). This same information may be appropriate for consideration within CERCLA risk assessments for these facilities. These OSDCs are generally developed to meet hazardous waste (HW) disposal design standards under the Resource Conservation and Recovery Act (RCRA) as well as the DOE Order 435.1 performance based standards for disposal of radioactive waste. To meet the standards for HW, the facilities typically include engineered covers and liner/leachate collection systems. Thus, when considering such facilities in the context of a DOE Order 435.1 PA, there is a need to address the evolution of performance of covers and liner/leachate collection systems in the context of meeting a performance standard considering time

  19. Circadian rhythms in cognitive performance: implications for neuropsychological assessment

    Directory of Open Access Journals (Sweden)

    Valdez P

    2012-12-01

    Full Text Available Pablo Valdez, Candelaria Ramírez, Aída GarcíaLaboratory of Psychophysiology, School of Psychology, University of Nuevo León, Monterrey, Nuevo León, MéxicoAbstract: Circadian variations have been found in human performance, including the efficiency to execute many tasks, such as sensory, motor, reaction time, time estimation, memory, verbal, arithmetic calculations, and simulated driving tasks. Performance increases during the day and decreases during the night. Circadian rhythms have been found in three basic neuropsychological processes (attention, working memory, and executive functions, which may explain oscillations in the performance of many tasks. The time course of circadian rhythms in cognitive performance may be modified significantly in patients with brain disorders, due to chronotype, age, alterations of the circadian rhythm, sleep deprivation, type of disorder, and medication. This review analyzes the recent results on circadian rhythms in cognitive performance, as well as the implications of these rhythms for the neuropsychological assessment of patients with brain disorders such as traumatic head injury, stroke, dementia, developmental disorders, and psychiatric disorders.Keywords: human circadian rhythms, cognitive performance, neuropsychological assessment, attention, working memory, executive functions

  20. Methodology for assessing performance of waste management systems

    Energy Technology Data Exchange (ETDEWEB)

    Meshkov, N.K.; Herzenberg, C.L.; Camasta, S.F.

    1988-01-01

    The purpose of the methodology provided in this report is to select the optimal way to manage particular sets of waste streams from generation to disposal in a safe and cost-effective manner. The methodology described is designed to review the entire waste management system, assess its performance, ensure that the performance objectives are met, compare different LLW management alternatives, and select the optimal alternative. The methodology is based on decision analysis approach, in which costs and risk are considered for various LLW management alternatives, a comparison of costs, risks, and benefits is made, and an optimal system is selected which minimizes costs and risks and maximizes benefits. A ''zoom-lens'' approach is suggested, i.e., one begins by looking at gross features and gradually proceeds to more and more detail. Performance assessment requires certain information about the characteristics of the waste streams and about the various components of the waste management system. Waste acceptance criteria must be known for each component of the waste management system. Performance assessment for each component requires data about properties of the waste streams and operational and design characteristics of the processing or disposal components. 34 refs., 2 figs., 1 tab.

  1. Economic Benefits: Metrics and Methods for Landscape Performance Assessment

    Directory of Open Access Journals (Sweden)

    Zhen Wang

    2016-04-01

    Full Text Available This paper introduces an expanding research frontier in the landscape architecture discipline, landscape performance research, which embraces the scientific dimension of landscape architecture through evidence-based designs that are anchored in quantitative performance assessment. Specifically, this paper summarizes metrics and methods for determining landscape-derived economic benefits that have been utilized in the Landscape Performance Series (LPS initiated by the Landscape Architecture Foundation. This paper identifies 24 metrics and 32 associated methods for the assessment of economic benefits found in 82 published case studies. Common issues arising through research in quantifying economic benefits for the LPS are discussed and the various approaches taken by researchers are clarified. The paper also provides an analysis of three case studies from the LPS that are representative of common research methods used to quantify economic benefits. The paper suggests that high(er levels of sustainability in the built environment require the integration of economic benefits into landscape performance assessment portfolios in order to forecast project success and reduce uncertainties. Therefore, evidence-based design approaches increase the scientific rigor of landscape architecture education and research, and elevate the status of the profession.

  2. The Complexities of Assessments in Professional Hospitality Education

    Science.gov (United States)

    Brinkman-Staneva, Marina

    2015-01-01

    Purpose: The purpose of this paper is to highlight some inadequacies of the position of lecturers' qualifications to design assessments within hospitality curricula while meeting the requirements of international and national quality frameworks.The Framework for Qualifications of the European Higher Education Area leaves the responsibility for…

  3. Reliable and valid assessment of performance in thoracoscopy

    DEFF Research Database (Denmark)

    Konge, Lars; Lehnert, Per; Hansen, Henrik Jessen

    2012-01-01

    , respect for tissue, precision of operative technique, creation and placement of ports, localization of pathologic tissue, use of staplers, retrieval of tissue in bag and placement of chest tube. Fifty consecutive thoracoscopic wedge resections were recorded and assessed blindly and independently by two...... was not significant (P = 0.10, ES = 0.64). The inter-rater reliability was acceptable (Cronbach's alpha 0.71). CONCLUSIONS: This tool for assessing performance in thoracoscopy is reliable and valid. It can provide unbiased feedback to trainees, and can be used to evaluate new teaching curricula, i.e. simulation...

  4. Accountability and assessment of emergency drill performance at schools.

    Science.gov (United States)

    Ramirez, Marizen; Kubicek, Katrina; Peek-Asa, Corinne; Wong, Marleen

    2009-01-01

    Many schools throughout the United States are mandated to hold drills, or operational exercises, to prepare for fires, earthquakes, violence, and other emergencies. However, drills have not been assessed for their effectiveness in improving preparedness at schools. This mixed-methods study measures the quantity and the quality of drills in an urban school district in Los Angeles. Compliance with California mandates was fair; most schools barely met requirements. Drills were not used as opportunities to improve procedures. Sites neither conducted any self-assessments nor made changes to procedures on the basis of performance. Suggestions include developing realistic simulated exercises, debriefing, and better school accountability for drills.

  5. Development and measurement properties of the self assessment version of the INTERMED for the elderly to assess case complexity

    NARCIS (Netherlands)

    Peters, Lilian L.; Boter, Han; Slaets, Joris P. J.; Buskens, Erik

    2013-01-01

    Objectives: The INFERMED for the Elderly Self Assessment (IM-E-SA) was developed to support health care professionals in providing demand driven elderly care. It assesses case complexity and health care needs as perceived by older adults themselves. By applying this instrument tailored care can be p

  6. Performance Assessment of Flight Simulator Servo System Based on LQG Performance Benchmark

    Directory of Open Access Journals (Sweden)

    Liu Huibo

    2015-01-01

    Full Text Available Flight simulator is an important application in the field of aerospace as semi-physical simulation equipment. As it requires supreme control precision and stability, it is especially important to search the performance assessment of flight simulator servo system. The traditional researches on flight simulator control performance index is more about dynamic output tracking features but few on input characteristics and effects. Based on Linear Quadratic Gaussian (LQG performance benchmark, this paper makes analyses on high precision flight simulator in three kinds of controller while considering the influences of input and output signals’ effect on controllers. After processing the input and output data, combined with the linear fitting method, we can obtain LQG performance tradeoff curve. Through comparing the controller’s actual performance with the optimal performance, we’ll gain the controller’s control performance index and its potential.

  7. Assess overall value of performance-related pay systems

    Institute of Scientific and Technical Information of China (English)

    Lin Boyu

    2015-01-01

    The main concern of human resource management is that people should work as efficiently as possible in the organization. The notorious payment by the result system which does not work very well lasted for many years. So, the organization attempts to achieve their goals by using various systems of payment to encourage and reward them. Performance related pay, as one of reward systems, has a range of advantages to motivate individuals to work harder or more productively. Nevertheless, there is also evidence of weakness and failures, which have some of the unacceptable and undesirable side effects. Sometimes the problem of performance related pay cannot produce the hoped benefits. This essay will focus on the advantages and disadvantages of performance-related pay schemes. Then, it will assess the overall value of performance-related pay systems.

  8. Engineering and Sizing Nanoreactors To Confine Metal Complexes for Enhanced Catalytic Performance

    NARCIS (Netherlands)

    Shakeri, Mozaffar; Roiban, Lucian; Yazerski, Vital; Prieto Gonzalez, Gonzalo; Klein Gebbink, Bert; de Jongh, Petra E.; de Jong, Krijn P.

    2014-01-01

    Homogeneous metal complexes often display superior activity and selectivity in catalysis of chemical transformations. Heterogenization of these complexes by immobilization on solid supports has been used to facilitate recovery, but this is often associated with a decrease in catalytic performance. W

  9. The Effects of Differential Goal Weights on the Performance of a Complex Financial Task.

    Science.gov (United States)

    Edmister, Robert O.; Locke, Edwin A.

    1987-01-01

    Determined whether people could obtain outcomes on a complex task that would be in line with differential goal weights corresponding to different aspects of the task. Bank lending officers were run through lender-simulation exercises. Five performance goals were weighted. Demonstrated effectiveness of goal setting with complex tasks, using group…

  10. Relating Complexity to Practical Performance in Parsing with Wide-Coverage Unification Grammars

    CERN Document Server

    Carroll, J

    1994-01-01

    The paper demonstrates that exponential complexities with respect to grammar size and input length have little impact on the performance of three unification-based parsing algorithms, using a wide-coverage grammar. The results imply that the study and optimisation of unification-based parsing must rely on empirical data until complexity theory can more accurately predict the practical behaviour of such parsers.

  11. The effects of physical threat on team processes during complex task performance

    NARCIS (Netherlands)

    Kamphuis, W.; Gaillard, A.W.K.; Vogelaar, A.L.W.

    2011-01-01

    Teams have become the norm for operating in dangerous and complex situations. To investigate how physical threat affects team performance, 27 threeperson teams engaged in a complex planning and problem-solving task, either under physical threat or under normal conditions. Threat consisted of the pos

  12. Fostering complex learning-task performance through scripting student use of computer supported representational tools

    NARCIS (Netherlands)

    Slof, Bert; Erkens, Gijs; Kirschner, Paul A.; Janssen, Jeroen; Phielix, Chris

    2010-01-01

    Slof, B., Erkens, G., Kirschner, P. A., Janssen, J., & Phielix, C. (2010). Fostering complex learning-task performance through scripting student use of computer supported representational tools. Computers & Education, 55(4), 1707-1720.

  13. Fluorescence-enhanced europium-diethylenetriaminepentaacetic (DTPA)-monoamide complexes for the assessment of renal function.

    Science.gov (United States)

    Chinen, Lori K; Galen, Karen P; Kuan, K T; Dyszlewski, Mary E; Ozaki, Hiroaki; Sawai, Hiroaki; Pandurangi, Raghootama S; Jacobs, Frederick G; Dorshow, Richard B; Rajagopalan, Raghavan

    2008-02-28

    Real-time, noninvasive assessment of glomerular filtration rate (GFR) is essential not only for monitoring critically ill patients at the bedside, but also for staging and monitoring patients with chronic kidney disease. In our pursuit to develop exogenous luminescent probes for dynamic optical monitoring of GFR, we have prepared and evaluated Eu(3+) complexes of several diethylenetriamine pentaacetate (DTPA)-monoamide ligands bearing molecular "antennae" to enhance metal fluorescence via intramolecular ligand-metal fluorescence resonance energy transfer process. The results show that Eu-DTPA-monoamide complex 18b, which contains a quinoxanlinyl antenna, exhibits large (ca. 2700-fold) Eu(3+) fluorescence enhancement. Indeed, complex 18b exhibits the highest fluorescent enhancement observed thus far in the DTPA-type metal complexes. The renal clearance property was assessed using the corresponding radioactive (111)In complex 18a, and the data suggest that this complex clears via a complex mechanism that includes glomerular filtration.

  14. ASSESSMENT OF LINEAR SPRINTING PERFORMANCE: A THEORETICAL PARADIGM

    Directory of Open Access Journals (Sweden)

    Jaci L. VanHeest

    2004-12-01

    Full Text Available The purpose of this manuscript is to describe a theoretical paradigm from which to more accurately assess linear sprinting performance. More importantly, the model describes how to interpret test results in order to pinpoint weaknesses in linear sprinting performance and design subsequent training programs. A retrospective, quasi-experimental cross sectional analysis was performed using 86 Division I female soccer and lacrosse players. Linear sprinting performance was assessed using infrared sensors at 9.14, 18.28, 27.42, and 36.58 meter distances. Cumulative (9.14, 18.28, 27.42, and 36.58 meter and individual (1st, 2nd, 3rd, and 4th 9.14 meter split times were used to illustrate the theoretical paradigm. Sub-groups were identified from the sample and labelled as above average (faster, average, and below average (slower. Statistical analysis showed each sub-group was significantly different from each other (fast < average < slow. From each sub-group select individuals were identified by having a 36.58 meter time within 0.05 seconds of each other (n = 11, 13, and 7, respectively. Three phases of the sprint test were suggested to exist and called initial acceleration (0-9.14 m, middle acceleration (9.14-27.42 m, and metabolic-stiffness transition (27.42-36.58 m. A new model for assessing and interpreting linear sprinting performance was developed. Implementation of this paradigm should assist sport performance professionals identify weaknesses, minimize training errors, and maximize training adaptations.

  15. Performance and evaluation of a coupled prognostic model TAPM over a mountainous complex terrain industrial area

    Science.gov (United States)

    Matthaios, Vasileios N.; Triantafyllou, Athanasios G.; Albanis, Triantafyllos A.; Sakkas, Vasileios; Garas, Stelios

    2017-04-01

    Atmospheric modeling is considered an important tool with several applications such as prediction of air pollution levels, air quality management, and environmental impact assessment studies. Therefore, evaluation studies must be continuously made, in order to improve the accuracy and the approaches of the air quality models. In the present work, an attempt is made to examine the air pollution model (TAPM) efficiency in simulating the surface meteorology, as well as the SO2 concentrations in a mountainous complex terrain industrial area. Three configurations under different circumstances, firstly with default datasets, secondly with data assimilation, and thirdly with updated land use, ran in order to investigate the surface meteorology for a 3-year period (2009-2011) and one configuration applied to predict SO2 concentration levels for the year of 2011.The modeled hourly averaged meteorological and SO2 concentration values were statistically compared with those from five monitoring stations across the domain to evaluate the model's performance. Statistical measures showed that the surface temperature and relative humidity are predicted well in all three simulations, with index of agreement (IOA) higher than 0.94 and 0.70 correspondingly, in all monitoring sites, while an overprediction of extreme low temperature values is noted, with mountain altitudes to have an important role. However, the results also showed that the model's performance is related to the configuration regarding the wind. TAPM default dataset predicted better the wind variables in the center of the simulation than in the boundaries, while improvement in the boundary horizontal winds implied the performance of TAPM with updated land use. TAPM assimilation predicted the wind variables fairly good in the whole domain with IOA higher than 0.83 for the wind speed and higher than 0.85 for the horizontal wind components. Finally, the SO2 concentrations were assessed by the model with IOA varied from 0

  16. Performance Assessment of Wire-Scanners at CERN

    CERN Document Server

    Baud, G; Emery, J; Gras, JJ; Guerrero, A; Piselli, E

    2013-01-01

    This article describes the current fast wire-scanner devices installed in circular accelerators at CERN with an emphasis on the error studies carried out during the last two runs. At present the wire-scanners have similar acquisition systems but are varied in terms of mechanics. Several measurement campaigns were performed aimed at establishing optimal operational settings and to identify and assess systematic errors. In several cases the results led to direct performance improvements while in others this helped in defining the requirements for new detectors.

  17. Risk assessment tools to identify women with increased risk of osteoporotic fracture: complexity or simplicity? A systematic review.

    Science.gov (United States)

    Rubin, Katrine Hass; Friis-Holmberg, Teresa; Hermann, Anne Pernille; Abrahamsen, Bo; Brixen, Kim

    2013-08-01

    A huge number of risk assessment tools have been developed. Far from all have been validated in external studies, more of them have absence of methodological and transparent evidence, and few are integrated in national guidelines. Therefore, we performed a systematic review to provide an overview of existing valid and reliable risk assessment tools for prediction of osteoporotic fractures. Additionally, we aimed to determine if the performance of each tool was sufficient for practical use, and last, to examine whether the complexity of the tools influenced their discriminative power. We searched PubMed, Embase, and Cochrane databases for papers and evaluated these with respect to methodological quality using the Quality Assessment Tool for Diagnostic Accuracy Studies (QUADAS) checklist. A total of 48 tools were identified; 20 had been externally validated, however, only six tools had been tested more than once in a population-based setting with acceptable methodological quality. None of the tools performed consistently better than the others and simple tools (i.e., the Osteoporosis Self-assessment Tool [OST], Osteoporosis Risk Assessment Instrument [ORAI], and Garvan Fracture Risk Calculator [Garvan]) often did as well or better than more complex tools (i.e., Simple Calculated Risk Estimation Score [SCORE], WHO Fracture Risk Assessment Tool [FRAX], and Qfracture). No studies determined the effectiveness of tools in selecting patients for therapy and thus improving fracture outcomes. High-quality studies in randomized design with population-based cohorts with different case mixes are needed.

  18. Influence choreographic readiness to gymnasts final assessment of performance skills

    Directory of Open Access Journals (Sweden)

    Omelichyk-Ziurkalova O.A.

    2014-06-01

    Full Text Available Purpose : to provide a quantitative assessment and expert choreographic preparedness gymnasts. Material : the study involved eight gymnasts competition finalists in the floor exercise - female members of the Ukrainian national team in gymnastics. Results : the quantitative indicators of acrobatic and dance elements to determine the baseline assessment. Defined methods complications composition on the floor exercise by reducing the number of acrobatic lines and diagonals and increase the number of gymnastic elements. The theoretical performance of the composite sequence is improved structure and increases the difficulty of the exercise. Conclusions : in the process of composition complications need to pay more attention to the technique of performing gymnastic elements. In improving exercise choreography element replace (in some cases acrobatic element. Based on the results is planned future direction of research in order to improve the training process in gymnastics.

  19. Two General Architectures for Intelligent Machine Performance Degradation Assessment

    Directory of Open Access Journals (Sweden)

    Yanwei Xu

    2015-01-01

    Full Text Available Markov model is of good ability to infer random events whose likelihood depends on previous events. Based on this theory, hidden Markov model serves as an extension of Markov model to present an event from observations rather than states in Markov model. Moreover, due to successful applications in speech recognition, it attracts much attention in machine fault diagnosis. This paper presents two architectures for machine performance degradation assessment, which can be used to minimize machine downtime, reduce economic loss, and improve productivity. The major difference between the two architectures is whether historical data are available to build hidden Markov models. In case studies, bearing data as well as available historical data are used to demonstrate the effectiveness of the first architecture. Then, whole life gearbox data without historical data are employed to demonstrate the effectiveness of the second architecture. The results obtained from two case studies show that the presented architectures have good abilities for machine performance degradation assessment.

  20. Total System Performance Assessment-License Application Methods and Approach

    Energy Technology Data Exchange (ETDEWEB)

    J. McNeish

    2002-09-13

    ''Total System Performance Assessment-License Application (TSPA-LA) Methods and Approach'' provides the top-level method and approach for conducting the TSPA-LA model development and analyses. The method and approach is responsive to the criteria set forth in Total System Performance Assessment Integration (TSPAI) Key Technical Issue (KTI) agreements, the ''Yucca Mountain Review Plan'' (CNWRA 2002 [158449]), and 10 CFR Part 63. This introductory section provides an overview of the TSPA-LA, the projected TSPA-LA documentation structure, and the goals of the document. It also provides a brief discussion of the regulatory framework, the approach to risk management of the development and analysis of the model, and the overall organization of the document. The section closes with some important conventions that are utilized in this document.

  1. Consideration of climate changes in biosphere modelling for performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Semioshkina, Nathascha; Staudt, Christian; Kaiser, Christian [Helmholtz Zentrum Muenchen Deutsches Forschungszentrum fuer Gesundheit und Umwelt GmbH, Neuherberg (Germany); Proehl, Gerhard; Fahrenholz, Christine; Noseck, Ulrich [Gesellschaft fuer Anlagen- und Reaktorsicherheit mbH (GRS), Koeln (Germany)

    2012-12-15

    The assessment of the long-term safety of a repository for radioactive or hazardous waste and therewith the development of a safety case requires a comprehensive system understanding, a continuous development of the methods of a safety case and capable and qualified numerical tools. The objective of the project ''Scientific basis for the assessment of the long-term safety of repositories'', identification number 02 E 10548, was to follow national and international developments in this area, to evaluate research projects, which contribute to knowledge, model approaches and data, and to perform specific investigations to improve the methodologies of the safety case and the long-term safety assessment.

  2. A Fuzzy Knowledge Representation Model for Student Performance Assessment

    DEFF Research Database (Denmark)

    Badie, Farshad

    Knowledge representation models based on Fuzzy Description Logics (DLs) can provide a foundation for reasoning in intelligent learning environments. While basic DLs are suitable for expressing crisp concepts and binary relationships, Fuzzy DLs are capable of processing degrees of truth/completene....../completeness about vague or imprecise information. This paper tackles the issue of representing fuzzy classes using OWL2 in a dataset describing Performance Assessment Results of Students (PARS)....

  3. Ultrasonic Dental Scaler Performance Assessment with an Innovative Cavitometer

    OpenAIRE

    Antonio H.A. Pereira; Camila Tirapelli; Lucimar A. Rodolpho

    2010-01-01

    Problem statement: There is no specific instrument to test ultrasonic dental scalers used in dentistry. Approach: The aim of this research was to develop and test an innovative cavitometer for quantitative and automatic performance assessments of Ultrasonic Dental Scalers (UDS) through the acoustic emission produced by cavitation induced by the tip of the UDS ultrasonic transducer when immersed in aqueous solution. Firstly, an optimized acoustic emission sensor specifically for UDS ultrasonic...

  4. A balanced perspective: using nonfinancial measures to assess financial performance.

    Science.gov (United States)

    Watkins, Ann L

    2003-11-01

    Assessments of hospitals' financial performance have traditionally been based exclusively on analysis of a concise set of key financial ratios. One study, however, demonstrates that analysis of a hospital's financial condition can be significantly enhanced with the addition of several nonfinancial measures, including case-mix adjusted admissions, case-mix adjusted admissions per full-time equivalent, and case-mix adjusted admissions per beds in service.

  5. Envisat Ocean Altimetry Performance Assessment and Cross-calibration

    OpenAIRE

    2006-01-01

    Nearly three years of Envisat altimetric observations over ocean are available in Geophysical Data Record (GDR) products. The quality assessment of these data is routinely performed at the CLS Space Oceanography Division in the frame of the CNES Segment Sol Altimétrie et Orbitographie (SSALTO) and ESA French Processing and Archiving Center (F-PAC) activities. This paper presents the main results in terms of Envisat data quality: verification of data availability and validity, monitoring of th...

  6. Expectations, observations, and the cognitive processes that bind them: expert assessment of examinee performance.

    Science.gov (United States)

    St-Onge, Christina; Chamberland, Martine; Lévesque, Annie; Varpio, Lara

    2016-08-01

    Performance-based assessment (PBA) is a valued assessment approach in medical education, be it in a clerkship, residency, or practice context. Raters are intrinsic to PBA and the increased use of PBA has lead to an increased interest in rater cognition. Although several researchers have tackled factors that may influence the variability in rater judgment, the critical examination of rater observation of performance and the translation of that data into judgements are being investigated. The purpose of this study was to qualitatively investigate the cognitive processes of raters, and to create a framework that conceptualizes those processes when raters assess a complex performance. We conducted semi-structured interviews with 11 faculty members (nominated as excellent assessors) from a Department of Medicine to investigate how raters observe, interpret, and translate performance into judgments. The transcribed verbal protocols were analyzed using Constructivist Grounded Theory in order to develop a theoretical model of raters' assessment processes. Several themes emerged from the data and were grouped according to three macro-level themes describing how the raters balance two sources of data [(1) external sources of information and (2) internal/personal sources of information] by relying on specific cognitive processes to assess an examinee performance. The results from our study demonstrate that assessment is a difficult cognitive task that involves nuance using specific cognitive processes to weigh external and internal data against each other. Our data clearly draws attention to the constant struggle between objectivity and subjectivity that is observed in assessment as illustrated by the importance given to nuancing the examinee's observed performance.

  7. Spectroscopy and laser performance of new BF{sub 2} complex dyes in solution

    Energy Technology Data Exchange (ETDEWEB)

    Allik, T.H. [Science Applications International Corp., McLean, VA (United States); Hermes, R.E. [Agilase Inc., White Rock, NM (United States); Sathyamoorthi, G.; Boyer, J.H. [Univ. of New Orleans, LA (United States). Dept. of Chemistry

    1994-12-31

    Four new BF{sub 2}-complex laser dyes have been synthesized and spectroscopic and laser studies have been performed. The 8-cyano-pyrromethene-BF{sub 2} complexes showed the best performance with red emission and slope efficiencies as high as 48% when pumped with a frequency doubled ND:YAG laser. Additionally, three previously known pyrromethene-BF{sub 2} complex dyes obtained from a commercial source were tested. These dyes showed a relative efficiency of greater than 80%, with one (PM-580) displaying a slope efficiency of 89%. This efficiency is the highest reported for any dye laser.

  8. Utilization of central nervous system resources for preparation and performance of complex walking tasks in older adults

    Directory of Open Access Journals (Sweden)

    David J Clark

    2014-08-01

    Full Text Available IntroductionWalking in the home and community often involves performance of complex walking tasks. Understanding the control of such tasks is crucial to preserving independence and quality of life in older adults. However, very little research has been conducted in this area. Here we assess the extent to which two measures of central nervous system (CNS activity are responsive to the challenges posed by preparation and performance of complex walking tasks. Prefrontal cortical activity was measured by functional near infrared spectroscopy (fNIRS and sympathetic nervous system arousal was measured by skin conductance level (SCL.Materials and MethodsSixteen older men and women (age 77.2 ± 5.6 years with mild mobility deficits participated in this study. Participants walked at their preferred speed without distractions along an unobstructed, well-lit course (control task and also walked on the same course under five separate challenging conditions: performing a cognitive verbal fluency task (verbal task, dim lighting (dim task, carrying a tray (carry task, negotiating obstacles (obstacles task and wearing a weighted vest (vest task. Mean prefrontal activation and SCL were calculated during the preparation and performance phases of each task. Gait spatiotemporal measurements were acquired by an instrumented gait mat.ResultsPrefrontal cortical activity and SCL were elevated during the preparation phase of complex walking tasks relative to the control task. During the performance phase, prefrontal activity remained elevated to a similar level as during task preparation. In contrast, SCL continued to increase beyond the level observed during task preparation. A larger increase in prefrontal activity was found to be linked to preserved quality of gait during complex walking tasks.DiscussionThese findings indicate that availability and utilization of CNS resources are important for optimizing performance of complex walking tasks in older adults.

  9. Comparing health system performance assessment and management approaches in the Netherlands and Ontario, Canada

    Directory of Open Access Journals (Sweden)

    Klazinga Niek S

    2007-02-01

    Full Text Available Abstract Background Given the proliferation and the growing complexity of performance measurement initiatives in many health systems, the Netherlands and Ontario, Canada expressed interests in cross-national comparisons in an effort to promote knowledge transfer and best practise. To support this cross-national learning, a study was undertaken to compare health system performance approaches in The Netherlands with Ontario, Canada. Methods We explored the performance assessment framework and system of each constituency, the embeddedness of performance data in management and policy processes, and the interrelationships between the frameworks. Methods used included analysing governmental strategic planning and policy documents, literature and internet searches, comparative descriptive tables, and schematics. Data collection and analysis took place in Ontario and The Netherlands. A workshop to validate and discuss the findings was conducted in Toronto, adding important insights to the study. Results Both Ontario and The Netherlands conceive health system performance within supportive frameworks. However they differ in their assessment approaches. Ontario's Scorecard links performance measurement with strategy, aimed at health system integration. The Dutch Health Care Performance Report (Zorgbalans does not explicitly link performance with strategy, and focuses on the technical quality of healthcare by measuring dimensions of quality, access, and cost against healthcare needs. A backbone 'five diamond' framework maps both frameworks and articulates the interrelations and overlap between their goals, themes, dimensions and indicators. The workshop yielded more contextual insights and further validated the comparative values of each constituency's performance assessment system. Conclusion To compare the health system performance approaches between The Netherlands and Ontario, Canada, several important conceptual and contextual issues must be addressed

  10. Reasonable Decisions in Portfolio Assessment: Evaluating Complex Evidence of Teaching

    Directory of Open Access Journals (Sweden)

    Aaron Schutz

    2004-07-01

    Full Text Available A central dilemma of portfolio assessment is that as the richness of the data available to readers increases, so do the challenges involved in ensuring acceptable reliability among readers. Drawing on empirical and theoretical work in discourse analysis, ethnomethodology, and other fields, we argue that this dilemma results, in part, from the fact that readers cannot avoid forming the data of a portfolio into a pattern—a coherent "story" or "stories"—in order to evaluate it. Our article presents case studies of readers independently evaluating the same portfolios. We show that even readers who hold a shared vision of effective teaching and who cite much the same evidence can, nonetheless, develop significantly different "stories." Our analysis illustrates that some portfolios are more ambiguous than others and are thus more likely to result in such divergent readings. We argue that more fine grained understandings of portfolio ambiguities and disagreements between readers over "stories" can help us respond to the challenges posed by the rich data of portfolio assessments.

  11. Performance-complexity tradeoff in sequential decoding for the unconstrained AWGN channel

    KAUST Repository

    Abediseid, Walid

    2013-06-01

    In this paper, the performance limits and the computational complexity of the lattice sequential decoder are analyzed for the unconstrained additive white Gaussian noise channel. The performance analysis available in the literature for such a channel has been studied only under the use of the minimum Euclidean distance decoder that is commonly referred to as the lattice decoder. Lattice decoders based on solutions to the NP-hard closest vector problem are very complex to implement, and the search for low complexity receivers for the detection of lattice codes is considered a challenging problem. However, the low computational complexity advantage that sequential decoding promises, makes it an alternative solution to the lattice decoder. In this work, we characterize the performance and complexity tradeoff via the error exponent and the decoding complexity, respectively, of such a decoder as a function of the decoding parameter - the bias term. For the above channel, we derive the cut-off volume-to-noise ratio that is required to achieve a good error performance with low decoding complexity. © 2013 IEEE.

  12. Using automated continual performance assessment to improve health care.

    Science.gov (United States)

    Wulff, K R; Westphal, J R; Shray, S L; Hunkeler, E F

    1997-01-01

    Inefficiency in the work of health care providers is evident and contributes to health care costs. In the early 20th century, industrial engineers developed scientific methods for studying work to improve performance (efficiency) by measuring results--i.e., quality, cost, and productivity. In the mid-20th century, business managers developed ways to apply these methods to improve the work process. These scientific methods and management approaches can be applied to improving medical work. Fee-for-service practice has had incentives to maximize productivity, and prepaid practice has had incentives to minimize costs, but no sector of the health care system has systematically pursued the optimization of all performance variables: quality, cost, and productivity. We have reviewed evolving methods for the automation of continual assessment of performance in health care using touch screen and computer telephone, logging and scheduling software, appropriate combinations of generic or disease-specific health status questionnaires, physiologic measurements or laboratory assays from computerized records, and cost and productivity data from computerized registration logs. We propose that the results of outcome assessment be rapidly and continually transmitted to providers, patients, and managers so that health care processes can be progressively improved. The evolving systems we have described are the practical tools that can help us achieve our performance goals.

  13. Performance Assessment of Aggregation Control Services for Demand Response

    DEFF Research Database (Denmark)

    Bondy, Daniel Esteban Morales; Costanzo, Giuseppe Tommaso; Heussen, Kai

    2014-01-01

    Aggregation algorithms that provide services to the grid via demand side management are moving from research ideas to the market. With the diversity of the technology delivering such services, it becomes essential to establish transparent performance standards from a service delivery perspective...... of the quality of service provided by an aggregation control algorithm. By a detailed case study we present and an application of the index, comparing the performance of two different control architectures for demand side management delivering a distribution grid service........ This paper formulates performance measures and an index to evaluate in hind sight the quality of service delivery by an aggregator, both with respect to ancillary service and asset management service. The index is based on requirements formulated in service contracts and provides an overall assessment...

  14. Simulation-based education and performance assessments for pediatric surgeons.

    Science.gov (United States)

    Barsness, Katherine

    2014-08-01

    Education in the knowledge, skills, and attitudes necessary for a surgeon to perform at an expert level in the operating room, and beyond, must address all potential cognitive and technical performance gaps, professionalism and personal behaviors, and effective team communication. Educational strategies should also seek to replicate the stressors and distractions that might occur during a high-risk operation or critical care event. Finally, education cannot remain fixed in an apprenticeship model of "See one, do one, teach one," whereby patients are exposed to the risk of harm inherent to any learning curve. The majority of these educational goals can be achieved with the addition of simulation-based education (SBE) as a valuable adjunct to traditional training methods. This article will review relevant principles of SBE, explore currently available simulation-based educational tools for pediatric surgeons, and finally make projections for the future of SBE and performance assessments for pediatric surgeons.

  15. Geotechnical Issues in Total System Performance Assessments of Yucca Mountain

    Energy Technology Data Exchange (ETDEWEB)

    HO,CLIFFORD K.; HOUSEWORTH,JIM; WILSON,MICHAEL L.

    1999-12-21

    A Total System Performance Assessment (TSPA) of Yucca Mountain consists of integrated sub-models and analyses of natural and engineered systems. Examples of subsystem models include unsaturated-zone flow and transport, seepage into drifts, coupled thermal hydrologic processes, transport through the engineered barrier system, and saturated-zone flow and transport. The TSPA evaluates the interaction of important processes among these subsystems, and it determines the impact of these processes on the overall performance measures (e.g., dose rate to humans). This paper summarizes the evaluation, abstraction, and combination of these subsystem models in a TSPA calculation, and it provides background on the individual TSPA subsystem components that are most directly impacted by geotechnical issues. The potential impact that geologic features, events, and processes have on the overall performance is presented, and an evaluation of the sensitivity of TSPA calculations to these issues is also provided.

  16. An Assessment of Wind Plant Complex Flows Using Advanced Doppler Radar Measurements

    Science.gov (United States)

    Gunter, W. S.; Schroeder, J.; Hirth, B.; Duncan, J.; Guynes, J.

    2015-12-01

    As installed wind energy capacity continues to steadily increase, the need for comprehensive measurements of wind plant complex flows to further reduce the cost of wind energy has been well advertised by the industry as a whole. Such measurements serve diverse perspectives including resource assessment, turbine inflow and power curve validation, wake and wind plant layout model verification, operations and maintenance, and the development of future advanced wind plant control schemes. While various measurement devices have been matured for wind energy applications (e.g. meteorological towers, LIDAR, SODAR), this presentation will focus on the use of advanced Doppler radar systems to observe the complex wind flows within and surrounding wind plants. Advanced Doppler radars can provide the combined advantage of a large analysis footprint (tens of square kilometers) with rapid data analysis updates (a few seconds to one minute) using both single- and dual-Doppler data collection methods. This presentation demonstrates the utility of measurements collected by the Texas Tech University Ka-band (TTUKa) radars to identify complex wind flows occurring within and nearby operational wind plants, and provide reliable forecasts of wind speeds and directions at given locations (i.e. turbine or instrumented tower sites) 45+ seconds in advance. Radar-derived wind maps reveal commonly observed features such as turbine wakes and turbine-to-turbine interaction, high momentum wind speed channels between turbine wakes, turbine array edge effects, transient boundary layer flow structures (such as wind streaks, frontal boundaries, etc.), and the impact of local terrain. Operational turbine or instrumented tower data are merged with the radar analysis to link the observed complex flow features to turbine and wind plant performance.

  17. Hanford immobilized low-activity tank waste performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Mann, F.M.

    1998-03-26

    The Hanford Immobilized Low-Activity Tank Waste Performance Assessment examines the long-term environmental and human health effects associated with the planned disposal of the vitrified low-level fraction of waste presently contained in Hanford Site tanks. The tank waste is the by-product of separating special nuclear materials from irradiated nuclear fuels over the past 50 years. This waste has been stored in underground single and double-shell tanks. The tank waste is to be retrieved, separated into low and high-activity fractions, and then immobilized by private vendors. The US Department of Energy (DOE) will receive the vitrified waste from private vendors and plans to dispose of the low-activity fraction in the Hanford Site 200 East Area. The high-level fraction will be stored at Hanford until a national repository is approved. This report provides the site-specific long-term environmental information needed by the DOE to issue a Disposal Authorization Statement that would allow the modification of the four existing concrete disposal vaults to provide better access for emplacement of the immobilized low-activity waste (ILAW) containers; filling of the modified vaults with the approximately 5,000 ILAW containers and filler material with the intent to dispose of the containers; construction of the first set of next-generation disposal facilities. The performance assessment activity will continue beyond this assessment. The activity will collect additional data on the geotechnical features of the disposal sites, the disposal facility design and construction, and the long-term performance of the waste. Better estimates of long-term performance will be produced and reviewed on a regular basis. Performance assessments supporting closure of filled facilities will be issued seeking approval of those actions necessary to conclude active disposal facility operations. This report also analyzes the long-term performance of the currently planned disposal system as a basis

  18. On the choice of performance assessment criteria and their impact on the overall system performance

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik; Green, Torben

    2010-01-01

    The aim of this paper is to illuminate the impact of the choice of a system’s performance criteria on the quality of the corresponding monitoring system’s assessment results. Special attention is given to the performance issues that are caused by or can be solved by control actions. The compressor...... capacity gap issue in the supermarket refrigeration systems is used as a case study to elaborate on the problem through employment of both real life field data as well as simulation data. A performance function that can capture the compressor capacity gap problem is presented in the paper and used...

  19. Authors' opinions on publication in relation to annual performance assessment

    Directory of Open Access Journals (Sweden)

    Hemmelgarn Brenda R

    2010-03-01

    Full Text Available Abstract Background In the past 50 years there has been a substantial increase in the volume of published research and in the number of authors per scientific publication. There is also significant pressure exerted on researchers to produce publications. Thus, the purpose of this study was to survey corresponding authors in published medical journals to determine their opinion on publication impact in relation to performance review and promotion. Methods Cross-sectional survey of corresponding authors of original research articles published in June 2007 among 72 medical journals. Measurement outcomes included the number of publications, number of authors, authorship order and journal impact factor in relation to performance review and promotion. Results Of 687 surveys, 478 were analyzed (response rate 69.6%. Corresponding authors self-reported that number of publications (78.7%, journal impact factor (67.8% and being the first author (75.9% were most influential for their annual performance review and assessment. Only 17.6% of authors reported that the number of authors on a manuscript was important criteria for performance review and assessment. A higher percentage of Asian authors reported that the number of authors was key to performance review and promotion (41.4% versus 7.8 to 22.2%. compared to authors from other countries. Conclusions The number of publications, authorship order and journal impact factor were important factors for performance reviews and promotion at academic and non-academic institutes. The number of authors was not identified as important criteria. These factors may be contributing to the increase in the number of authors per publication.

  20. Performance Assessment and Authentic Assessment: A Conceptual Analysis of the Literature

    OpenAIRE

    Torulf Palm

    2008-01-01

    Performance assessment and authentic assessment are recurrent terms in the literature on education and educational research. They have both been given a number of different meanings and unclear definitions and are in some publications not defined at all. Such uncertainty of meaning causes difficulties in interpretation and communication and can cause clouded or misleading research conclusions. This paper reviews the meanings attached to these concepts in the literature and describes the simil...

  1. Merit based selection and performance assessment for mineworkers

    Energy Technology Data Exchange (ETDEWEB)

    Edmonds-Ward, L.; Trendell, B. [Wambo Mining Corporation Pty. Ltd. (Australia)

    1998-12-31

    While objective selection and assessments are an accepted part of employing managers and other staff, they have had only a limited place when selecting mineworkers in Australia. Wambo Mining Corporation has used occupational testing as part of its recruitment process since 1994. In 1997 when Wambo undertook development of a new `on site` subsidiary underground mine called Wollemi Services, they wanted to select the most appropriate people in terms of skill and on the job performance. A process was agreed between management, employees and their local representatives to select and transfer people on merit from within shift groups. In the first intake, three supervisors and thirty-nine production workers were selected from an existing workforce of over two hundred. Part of the process to ensure validity and to help people feel comfortable was an objective job analysis for positions. From a computer-based analysis, person specifications were developed and appropriate test batteries identified to facilitate selection. A combination of a self-report occupational personality or work styles questionnaire and several ability tests were used. In addition, each employee and two supervisors completed an assessment of the employee`s current work performance. The validity of the self-report assessments has since been confirmed in a correlation analysis of the results with supervisor feedback on performance. It was essential that the overall process was confidential so that people would be prepared to participate and the vast majority of people took up the competitive challenge. In the four months since the process, there has been a significant breakdown of restrictive practices. As expected, there was a productivity improvement at the new site. In addition, at the existing mine there has been a significant realignment of individual performance with many individuals being dynamic, progressive and showing real responsibility in their work. 2 tabs.

  2. Task complexity and linguistic performance in L2 writing and speaking: the effect of mode

    NARCIS (Netherlands)

    Kuiken, F.; Vedder, I.; Robinson, P.

    2011-01-01

    The chapter discusses the question to what extent the effect of task complexity on linguistic performance in L2 writing and speaking is influenced by the mode in which the tasks have to be performed (oral versus written). The majority of studies which have been conducted so far in the framework of

  3. Complex health care interventions: Characteristics relevant for ethical analysis in health technology assessment

    Directory of Open Access Journals (Sweden)

    Lysdahl, Kristin Bakke

    2016-03-01

    Full Text Available Complexity entails methodological challenges in assessing health care interventions. In order to address these challenges, a series of characteristics of complexity have been identified in the Health Technology Assessment (HTA literature. These characteristics are primarily identified and developed to facilitate effectiveness, safety, and cost-effectiveness analysis. However, ethics is also a constitutive part of HTA, and it is not given that the conceptions of complexity that appears relevant for effectiveness, safety, and cost-effectiveness analysis are also relevant and directly applicable for ethical analysis in HTA. The objective of this article is therefore to identify and elaborate a set of key characteristics of complex health care interventions relevant for addressing ethical aspects in HTA. We start by investigating the relevance of the characteristics of complex interventions, as defined in the HTA literature. Most aspects of complexity found to be important when assessing effectiveness, safety, and efficiency turn out also to be relevant when assessing ethical issues of a given health technology. However, the importance and relevance of the complexity characteristics may differ when addressing ethical issues rather than effectiveness. Moreover, the moral challenges of a health care intervention may themselves contribute to the complexity. After identifying and analysing existing conceptions of complexity, we synthesise a set of five key characteristics of complexity for addressing ethical aspects in HTA: 1 multiple and changing perspectives, 2 indeterminate phenomena, 3 uncertain causality, 4 unpredictable outcome, and 5 ethical complexity. This may serve as an analytic tool in addressing ethical issues in HTA of complex interventions.

  4. Assessing patient care: summary of the breakout group on assessment of observable learner performance.

    Science.gov (United States)

    Takayesu, James Kimo; Kulstad, Christine; Wallenstein, Joshua; Gallahue, Fiona; Gordon, David; Leone, Katrina; Kessler, Chad

    2012-12-01

    There is an established expectation that physicians in training demonstrate competence in all aspects of clinical care prior to entering professional practice. Multiple methods have been used to assess competence in patient care, including direct observation, simulation-based assessments, objective structured clinical examinations (OSCEs), global faculty evaluations, 360-degree evaluations, portfolios, self-reflection, clinical performance metrics, and procedure logs. A thorough assessment of competence in patient care requires a mixture of methods, taking into account each method's costs, benefits, and current level of evidence. At the 2012 Academic Emergency Medicine (AEM) consensus conference on educational research, one breakout group reviewed and discussed the evidence supporting various methods of assessing patient care and defined a research agenda for the continued development of specific assessment methods based on current best practices. In this article, the authors review each method's supporting reliability and validity evidence and make specific recommendations for future educational research.

  5. Making robust assessments of specialist trainees' workplace performance.

    Science.gov (United States)

    Weller, J M; Castanelli, D J; Chen, Y; Jolly, B

    2017-02-01

    Workplace-based assessments should provide a reliable measure of trainee performance, but have met with mixed success. We proposed that using an entrustability scale, where supervisors scored trainees on the level of supervision required for the case would improve the utility of compulsory mini-clinical evaluation exercise (CEX) assessments in a large anaesthesia training program. We analysed mini-CEX scores from all Australian and New Zealand College of Anaesthetists trainees submitted to an online database over a 12-month period. Supervisors' scores were adjusted for the expected supervision requirement for the case for trainees at different stages of training. We used generalisability theory to determine score reliability. 7808 assessments were available for analysis. Supervision requirements decreased significantly (P  0.7) with a feasible number of assessments. Adjusting scores against the expected supervision requirement considerably improved reliability, with G > 0.8 achieved with only nine assessments. Three per cent of trainees generated average mini-CEX scores below the expected standard. Using an entrustment scoring system, where supervisors score trainees on the level of supervision required, mini-CEX scores demonstrated moderate reliability within a feasible number of assessments, and evidence of validity. When scores were adjusted against an expected standard, underperforming trainees could be identified, and reliability much improved. Taken together with other evidence on trainee ability, the mini-CEX is of sufficient reliability for inclusion in high stakes decisions on trainee progression towards independent specialist practice. © The Author 2017. Published by Oxford University Press on behalf of the British Journal of Anaesthesia. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  6. Euclid end-to-end straylight performance assessment

    Science.gov (United States)

    Gaspar Venancio, Luis M.; Pachot, Charlotte; Carminati, Lionel; Lorenzo Alvarez, Jose; Amiaux, Jérôme; Prieto, Eric; Bonino, Luciana; Salvignol, Jean-Christophe; Short, Alex; Boenke, Tobias; Strada, Paulo; Laureijs, Rene

    2016-07-01

    In the Euclid mission the straylight has been identified at an early stage as the main driver for the final imaging quality of the telescope. The assessment by simulation of the final straylight in the focal plane of both instruments in Euclid's payload have required a complex workflow involving all stakeholders in the mission, from industry to the scientific community. The straylight is defined as a Normalized Detector Irradiance (NDI) which is a convenient definition tool to separate the contributions of the telescope and of the instruments. The end-to-end straylight of the payload is then simply the sum of the NDIs of the telescope and of each instrument. The NDIs for both instruments are presented in this paper for photometry and spectrometry.

  7. Assessment Of Professional Tour Guides’ Performances By Local Tourists

    Directory of Open Access Journals (Sweden)

    Atınç Olcay

    2015-06-01

    Full Text Available With the help of internet and other social networks, a more conscious tourist profile has gained momentum in this new tourism era. The professional tour guide (PTG services, one of the most important components of the tourism services, have been inspired due to these developments. The PTG contributes tremendously to the success of packaged tours. As such, this research aims to determine the importance levels of the expected PTG's qualifications and assessing the performance of PTG’s from the local tourists’ perspectives. In order to ascertain the aim, survey was conducted with 472 local tourists that visited Gaziantep in 2014 with guided package tours in the months of March and April. The findings indicated that the ratings give PTGs’ performances were lower than that of their qualifications’ importance level. From this point of view, it can be suggested that PTGs’ performance levels stay under local tourists’ expectations within the research framework. The results also indicate statistically significant differences with %5 significance level between local tourists’ assessments on knowledge, abilities/skills and characteristics of PTGs and local tourist’ education levels, genders and package tour participation frequencies

  8. Driver performance-based assessment of thermal display degradation effects

    Science.gov (United States)

    Ruffner, John W.; Massimi, Michael S.; Choi, Yoon S.; Ferrett, Donald A.

    1998-07-01

    The Driver's Vision Enhancer (DVE) is a thermal sensor and display combination currently being procured for use in U.S. Army combat and tactical wheeled vehicles. During the DVE production process, a given number of sensor or display pixels may either vary from the desired luminance values (nonuniform) or be inactive (nonresponsive). The amount and distribution of pixel luminance nonuniformity (NU) and nonresponsivity (NR) allowable in production DVEs is a significant cost factor. No driver performance-based criteria exist for determining the maximum amount of allowable NU and NR. For safety reasons, these characteristics are specified conservatively. This paper describes an experiment to assess the effects of different levels of display NU and NR on Army drivers' ability to identify scene features and obstacles using a simulated DVE display and videotaped driving scenarios. Baseline, NU, and NR display conditions were simulated using real-time image processing techniques and a computer graphics workstation. The results indicate that there is a small, but statistically insignificant decrease in identification performance with the NU conditions tested. The pattern of the performance-based results is consistent with drivers' subjective assessments of display adequacy. The implications of the results for specifying NU and NR criteria for the DVE display are discussed.

  9. Predicting work Performance through selection interview ratings and Psychological assessment

    Directory of Open Access Journals (Sweden)

    Liziwe Nzama

    2008-12-01

    Full Text Available The aim of the study was to establish whether selection interviews used in conjunction with psychological assessments of personality traits and cognitive functioning contribute to predicting work performance. The sample consisted of 102 managers who were appointed recently in a retail organisation. The independent variables were selection interview ratings obtained on the basis of structured competency-based interview schedules by interviewing panels, fve broad dimensions of personality defned by the Five Factor Model as measured by the 15 Factor Questionnaire (15FQ+, and cognitive processing variables (current level of work, potential level of work, and 12 processing competencies measured by the Cognitive Process Profle (CPP. Work performance was measured through annual performance ratings that focused on measurable outputs of performance objectives. Only two predictor variables correlated statistically signifcantly with the criterion variable, namely interview ratings (r = 0.31 and CPP Verbal Abstraction (r = 0.34. Following multiple regression, only these variables contributed signifcantly to predicting work performance, but only 17.8% of the variance of the criterion was accounted for.

  10. The Effect of Performance-Contingent Incentives when Task Complexity is Manipulated through Instruction

    Directory of Open Access Journals (Sweden)

    Monte Wynder

    2010-12-01

    Full Text Available When, and how, performance-contingent incentives improve performance is an important question fororganisations. Empirical results have been mixed – performance-contingent incentives sometimes increaseperformance, sometimes decrease performance, and sometimes have no effect. Theorists have called forfurther research to identify the effect of various moderating variables, including knowledge and taskcomplexity. This study responds by considering the role of instruction in providing the necessary knowledgeto reduce task complexity. The results suggest that a performance-contingent penalty can be a particularlyeffective means of directing effort for a simple task. For a complex task, performance can be improvedthrough instruction. The type of instruction is important – with rule-based instruction effectively directingeffort – however principle-based instruction is necessary to facilitate problem investigation and problemsolving.

  11. Performance assessment for municipal solid waste collection in Taiwan.

    Science.gov (United States)

    Huang, You-Ti; Pan, Tze-Chin; Kao, Jehng-Jung

    2011-04-01

    Collecting municipal solid waste (MSW) is a major and expensive task for local waste management authorities, thus efficient MSW collection is a necessity. This study presents a procedure for developing an aggregate indicator (AI) to assess MSW collection efficiency based on multiple factors. The applicabilities of various key performance indicators (KPIs) are evaluated based on five selection criteria, and five KPIs are chosen to form the AI. The relative efficiencies of local MSW collection services are analyzed by the data envelopment analysis (DEA) method. A set of common weights for all five KPIs is then generated based on DEA results and four selection rules by modifying a previous approach. Finally, the proposed AI is applied to assess the MSW collection services provided by 307 local governments in Taiwan, and associated results are compared and discussed.

  12. Assigning probability distributions to input parameters of performance assessment models

    Energy Technology Data Exchange (ETDEWEB)

    Mishra, Srikanta [INTERA Inc., Austin, TX (United States)

    2002-02-01

    This study presents an overview of various approaches for assigning probability distributions to input parameters and/or future states of performance assessment models. Specifically,three broad approaches are discussed for developing input distributions: (a) fitting continuous distributions to data, (b) subjective assessment of probabilities, and (c) Bayesian updating of prior knowledge based on new information. The report begins with a summary of the nature of data and distributions, followed by a discussion of several common theoretical parametric models for characterizing distributions. Next, various techniques are presented for fitting continuous distributions to data. These include probability plotting, method of moments, maximum likelihood estimation and nonlinear least squares analysis. The techniques are demonstrated using data from a recent performance assessment study for the Yucca Mountain project. Goodness of fit techniques are also discussed, followed by an overview of how distribution fitting is accomplished in commercial software packages. The issue of subjective assessment of probabilities is dealt with in terms of the maximum entropy distribution selection approach, as well as some common rules for codifying informal expert judgment. Formal expert elicitation protocols are discussed next, and are based primarily on the guidance provided by the US NRC. The Bayesian framework for updating prior distributions (beliefs) when new information becomes available is discussed. A simple numerical approach is presented for facilitating practical applications of the Bayes theorem. Finally, a systematic framework for assigning distributions is presented: (a) for the situation where enough data are available to define an empirical CDF or fit a parametric model to the data, and (b) to deal with the situation where only a limited amount of information is available.

  13. Individual Performance: From Common Source Bias to Institutionalized Assessment

    DEFF Research Database (Denmark)

    Andersen, Lotte Bøgh; Heinesen, Eskil; Pedersen, Lene Holm

    2016-01-01

    of the assessment. Our investigated explanatory variables are intrinsic motivation, public service motivation, and job satisfaction. Combining survey and administrative data for 747 lower secondary school teachers (teaching 5,679 students in 85 schools), we analyze 4 different measures of the same performance...... dimension for the same teachers: the teachers’ self-reported contributions to students’ academic skills, the students’ marks for the year’s work given by the teacher, marks in oral exams with one external examiner and the teacher, and marks in written exams with at least one external examiner...

  14. Employment of kernel methods on wind turbine power performance assessment

    DEFF Research Database (Denmark)

    Skrimpas, Georgios Alexandros; Sweeney, Christian Walsted; Marhadi, Kun S.

    2015-01-01

    A power performance assessment technique is developed for the detection of power production discrepancies in wind turbines. The method employs a widely used nonparametric pattern recognition technique, the kernel methods. The evaluation is based on the trending of an extracted feature from...... the kernel matrix, called similarity index, which is introduced by the authors for the first time. The operation of the turbine and consequently the computation of the similarity indexes is classified into five power bins offering better resolution and thus more consistent root cause analysis. The accurate...

  15. Comfort Indicators for the Assessment of Indoor Environmental Building Performance

    DEFF Research Database (Denmark)

    Brohus, Henrik; Bendtsen, A.; Sørensen, M.

    2006-01-01

    Indoor environmental building performance assessment requires efficient indicators of the indoor comfort. In order to be effective and useful the comfort indicators must be able to include the temporal variation of indoor comfort as well as the degree of discomfort perceived by the occupants....... This paper discusses and presents a number of comfort indicators that includes both the temporal variation and the degree of discomfort in the calculations. A test case comprising a ventilated office building is used to show the application of the various comfort indices. It is found that the new comfort...... indices provide substantially new information and constitute much better decision tools....

  16. A Framework for Assessing the Performance of Pulsar Search Pipelines

    CERN Document Server

    van Heerden, E; Roberts, S J

    2016-01-01

    In this paper, we present a framework for assessing the effect of non-stationary Gaussian noise and radio frequency interference (RFI) on the signal to noise ratio, the number of false positives detected per true positive and the sensitivity of standard pulsar search pipelines. The results highlight the necessity to develop algorithms that are able to identify and remove non-stationary variations from the data before RFI excision and searching is performed in order to limit false positive detections. The results also show that the spectrum whitening algorithms currently employed, severely affect the efficiency of pulsar search pipelines by reducing their sensitivity to long period pulsars.

  17. Using Performance in Multiple Simulated Scenarios to Assess Bronchoscopy Skills

    DEFF Research Database (Denmark)

    Konge, Lars; Arendrup, Henrik; Buchwald, Christian von

    2011-01-01

    using a standardized scoring form. Methods: The test was administered on a virtual reality bronchoscopy simulator to a total of 42 test subjects (14 senior consultants, 14 trainees and 14 medical students). The inter-rater reliability of the test procedure was explored according to examination of test......Background: International guidelines suggest that trainees should perform at least 100 flexible bronchoscopies in a supervised setting, but this number is not evidence based. An objective assessment method could provide educational feedback to trainees and help supervisors decide when basic...

  18. Annual Summary of the Integrated Disposal Facility Performance Assessment 2012

    Energy Technology Data Exchange (ETDEWEB)

    Khaleel, R. [INTERA, Austin, TX (United States); Nichols, W. E. [CH2M HILL Plateau Remediation Company, Richland, WA (United States)

    2012-12-27

    An annual summary of the adequacy of the Hanford Immobilized Low-Activity Waste (ILAW) Performance Assessment (PA) is required each year (DOE O 435.1 Chg 1,1 DOE M 435.1-1 Chg 1;2 and DOE/ORP-2000-013). The most recently approved PA is DOE/ORP-2000-24.4 The ILAW PA evaluated the adequacy of the ILAW disposal facility, now referred to as the Integrated Disposal Facility (IDF), for the safe disposal of vitrified Hanford Site tank waste.

  19. Does complexity matter? Meta-analysis of learner performance in artificial grammar tasks.

    Science.gov (United States)

    Schiff, Rachel; Katan, Pesia

    2014-01-01

    Complexity has been shown to affect performance on artificial grammar learning (AGL) tasks (categorization of test items as grammatical/ungrammatical according to the implicitly trained grammar rules). However, previously published AGL experiments did not utilize consistent measures to investigate the comprehensive effect of grammar complexity on task performance. The present study focused on computerizing Bollt and Jones's (2000) technique of calculating topological entropy (TE), a quantitative measure of AGL charts' complexity, with the aim of examining associations between grammar systems' TE and learners' AGL task performance. We surveyed the literature and identified 56 previous AGL experiments based on 10 different grammars that met the sampling criteria. Using the automated matrix-lift-action method, we assigned a TE value for each of these 10 previously used AGL systems and examined its correlation with learners' task performance. The meta-regression analysis showed a significant correlation, demonstrating that the complexity effect transcended the different settings and conditions in which the categorization task was performed. The results reinforced the importance of using this new automated tool to uniformly measure grammar systems' complexity when experimenting with and evaluating the findings of AGL studies.

  20. Does Complexity Matter? Meta-Analysis of Learner Performance in Artificial Grammar Tasks

    Directory of Open Access Journals (Sweden)

    Rachel eSchiff

    2014-09-01

    Full Text Available Complexity has been shown to affect performance on artificial grammar learning (AGL tasks (categorization of test items as grammatical/ungrammatical according to the implicitly trained grammar rules. However, previously published AGL experiments did not utilize consistent measures to investigate the comprehensive effect of grammar complexity on task performance. The present study focused on computerizing Bollt and Jones's (2000 technique of calculating topological entropy (TE, a quantitative measure of AGL charts' complexity, with the aim of examining associations between grammar systems' TE and learners’ AGL task performance. We surveyed the literature and identified 56 previous AGL experiments based on 10 different grammars that met the sampling criteria. Using the automated matrix-lift-action method, we assigned a TE value for each of these 10 previously used AGL systems and examined its correlation with learners' task performance. The meta-regression analysis showed a significant correlation, demonstrating that the complexity effect transcended the different settings and conditions in which the categorization task was performed. The results reinforced the importance of using this new automated tool to uniformly measure grammar systems’ complexity when experimenting with and evaluating the findings of AGL studies.

  1. Strategy for experimental validation of waste package performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Bates, J.K.; Abrajano, T.A. Jr.; Wronkiewicz, D.J.; Gerding, T.J.; Seils, C.A.

    1990-07-01

    A strategy for the experimental validation of waste package performance assessment has been developed as part of a program supported by the Repository Technology Program. The strategy was developed by reviewing the results of laboratory analog experiments, in-situ tests, repository simulation tests, and material interaction tests. As a result of the review, a listing of dependent and independent variables that influence the ingress of water into the near-field environment, the reaction between water and the waste form, and the transport of radionuclides from the near-field environment was developed. The variables necessary to incorporate into an experimental validation strategy were chosen by identifying those which had the greatest effect of each of the three major events, i.e., groundwater ingress, waste package reactions, and radionuclide transport. The methodology to perform validation experiments was examined by utilizing an existing laboratory analog approach developed for unsaturated testing of glass waste forms. 185 refs., 9 figs., 2 tabs.

  2. Performance Assessment Method for a Forged Fingerprint Detection Algorithm

    Science.gov (United States)

    Shin, Yong Nyuo; Jun, In-Kyung; Kim, Hyun; Shin, Woochang

    The threat of invasion of privacy and of the illegal appropriation of information both increase with the expansion of the biometrics service environment to open systems. However, while certificates or smart cards can easily be cancelled and reissued if found to be missing, there is no way to recover the unique biometric information of an individual following a security breach. With the recognition that this threat factor may disrupt the large-scale civil service operations approaching implementation, such as electronic ID cards and e-Government systems, many agencies and vendors around the world continue to develop forged fingerprint detection technology, but no objective performance assessment method has, to date, been reported. Therefore, in this paper, we propose a methodology designed to evaluate the objective performance of the forged fingerprint detection technology that is currently attracting a great deal of attention.

  3. Performance Assessment of Hydrological Models Considering Acceptable Forecast Error Threshold

    Directory of Open Access Journals (Sweden)

    Qianjin Dong

    2015-11-01

    Full Text Available It is essential to consider the acceptable threshold in the assessment of a hydrological model because of the scarcity of research in the hydrology community and errors do not necessarily cause risk. Two forecast errors, including rainfall forecast error and peak flood forecast error, have been studied based on the reliability theory. The first order second moment (FOSM and bound methods are used to identify the reliability. Through the case study of the Dahuofang (DHF Reservoir, it is shown that the correlation between these two errors has great influence on the reliability index of hydrological model. In particular, the reliability index of the DHF hydrological model decreases with the increasing correlation. Based on the reliability theory, the proposed performance evaluation framework incorporating the acceptable forecast error threshold and correlation among the multiple errors can be used to evaluate the performance of a hydrological model and to quantify the uncertainties of a hydrological model output.

  4. Experimental Methods for UAV Aerodynamic and Propulsion Performance Assessment

    Directory of Open Access Journals (Sweden)

    Stefan ANTON

    2015-06-01

    Full Text Available This paper presents an experimental method for assessing the performances and the propulsion power of a UAV in several points based on telemetry. The points in which we make the estimations are chosen based on several criteria and the fallowing parameters are measured: airspeed, time-to-climb, altitude and the horizontal distance. With the estimated propulsion power and knowing the shaft motor power, the propeller efficiency is determined at several speed values. The shaft motor power was measured in the lab using the propeller as a break. Many flights, using the same UAV configuration, were performed before extracting flight data, in order to reduce the instrumental or statistic errors. This paper highlights both the methodology of processing the data and the validation of theoretical results.

  5. SEPS comet rendezvous performance assessment. [Solar Electric Propulsion System

    Science.gov (United States)

    Sauer, C. G., Jr.

    1980-01-01

    This paper presents an assessment of delivered payload capability for a number of selected rendezvous missions to periodic comets with launch opportunities through the years 1986-1996. These missions are chosen using a selection criteria that considers both expected scientific interest and earth-based sighting considerations. Some 22 mission opportunities are found that satisfies the selection criteria. Spacecraft performance is presented for each mission opportunity based on use of a space shuttle, a twin stage inertial-upper-stage, and a conceptual solar-electric-propulsion-system with a nominal rendezvous 50 days before comet perihelion. Additional trajectory and propulsion enhancements are investigated for several comet rendezvous missions in order to improve spacecraft performance. An indirect transfer trajectory for an Encke mission is shown to offer substantial delivered payload. In addition the use of concentrator solar arrays is considered for several of the more interesting comet missions.

  6. PORFLOW Modeling Supporting The H-Tank Farm Performance Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Jordan, J. M.; Flach, G. P.; Westbrook, M. L.

    2012-08-31

    Numerical simulations of groundwater flow and contaminant transport in the vadose and saturated zones have been conducted using the PORFLOW code in support of an overall Performance Assessment (PA) of the H-Tank Farm. This report provides technical detail on selected aspects of PORFLOW model development and describes the structure of the associated electronic files. The PORFLOW models for the H-Tank Farm PA, Rev. 1 were updated with grout, solubility, and inventory changes. The aquifer model was refined. In addition, a set of flow sensitivity runs were performed to allow flow to be varied in the related probabilistic GoldSim models. The final PORFLOW concentration values are used as input into a GoldSim dose calculator.

  7. Performance limitations of label-free sensors in molecular diagnosis using complex samples

    Science.gov (United States)

    Varma, Manoj

    2016-03-01

    Label-free biosensors promised a paradigm involving direct detection of biomarkers from complex samples such as serum without requiring multistep sample processing typical of labelled methods such as ELISA or immunofluorescence assays. Label-free sensors have witnessed decades of development with a veritable zoo of techniques available today exploiting a multitude of physical effects. It is appropriate now to critically assess whether label-free technologies have succeeded in delivering their promise with respect to diagnostic applications, particularly, ambitious goals such as early cancer detection using serum biomarkers, which require low limits of detection (LoD). Comparison of nearly 120 limits of detection (LoD) values reported by labelled and label-free sensing approaches over a wide range of detection techniques and target molecules in serum revealed that labeled techniques achieve 2-3 orders of magnitude better LoDs. Data from experiments where labelled and label-free assays were performed simultaneously using the same assay parameters also confirm that the LoD achieved by labelled techniques is 2 to 3 orders of magnitude better than that by label-free techniques. Furthermore, label-free techniques required significant signal amplification, for e.g. using nanoparticle conjugated secondary antibodies, to achieve LoDs comparable to labelled methods substantially deviating from the original "direct detection" paradigm. This finding has important implications on the practical limits of applying label-free detection methods for molecular diagnosis.

  8. University Students' Perceptions of Integrated Performance Assessment and the Connection between Classroom Learning and Assessment

    Science.gov (United States)

    Zapata, Gabriela C.

    2016-01-01

    In 2013, Integrated Performance Assessment (IPA) was adopted at all levels of instruction at a private university in southern California. The study reports the opinions of 1,236 Novice, Intermediate Low, and Intermediate Mid Spanish students concerning IPA and their perceptions of the way in which classroom instruction was reflected in the content…

  9. Control Performance Management in Industrial Automation Assessment, Diagnosis and Improvement of Control Loop Performance

    CERN Document Server

    Jelali, Mohieddine

    2013-01-01

    Control Performance Management in Industrial Automation provides a coherent and self-contained treatment of a group of methods and applications of burgeoning importance to the detection and solution of problems with control loops that are vital in maintaining product quality, operational safety, and efficiency of material and energy consumption in the process industries. The monograph deals with all aspects of control performance management (CPM), from controller assessment (minimum-variance-control-based and advanced methods), to detection and diagnosis of control loop problems (process non-linearities, oscillations, actuator faults), to the improvement of control performance (maintenance, re-design of loop components, automatic controller re-tuning). It provides a contribution towards the development and application of completely self-contained and automatic methodologies in the field. Moreover, within this work, many CPM tools have been developed that goes far beyond available CPM packages. Control Perform...

  10. The differential effects of task complexity on domain-specific and peer assessment skills

    NARCIS (Netherlands)

    Sluijsmans, Dominique; Zundert, Marjo van; Könings, K.; Merriënboer, J.J.G. van

    2012-01-01

    In this study the relationship between domain-specific skills and peer assessment skills as a function of task complexity is investigated. We hypothesised that peer assessment skills were superposed on domain-specific skills and will therefore suffer more when higher cognitive load is induced by inc

  11. Assessing Dimensionality of Noncompensatory Multidimensional Item Response Theory with Complex Structures

    Science.gov (United States)

    Svetina, Dubravka

    2013-01-01

    The purpose of this study was to investigate the effect of complex structure on dimensionality assessment in noncompensatory multidimensional item response models using dimensionality assessment procedures based on DETECT (dimensionality evaluation to enumerate contributing traits) and NOHARM (normal ogive harmonic analysis robust method). Five…

  12. Validation of Experimental whole-body SAR Assessment Method in a Complex Indoor Environment

    DEFF Research Database (Denmark)

    Bamba, Aliou; Joseph, Wout; Vermeeren, Gunter

    2012-01-01

    Assessing experimentally the whole-body specific absorption rate (SARwb) in a complex indoor environment is very challenging. An experimental method based on room electromagnetics theory (accounting only the Line-Of-Sight as specular path) to assess the whole-body SAR is validated by numerical...

  13. The Complexity of the Assessment of Creative Climate and Group Creativity

    DEFF Research Database (Denmark)

    Luo, Lingling; Deng, Xuemei; Zhou, Chunfang

    2015-01-01

    This paper provides a literature review that firstly demonstrates a growing interests in studies on creative climate and group creativity that is followed by a discussion on the important methodological significances of assessment of climate and the complexity of assessing group creativity. From...

  14. Metal complexes of Proline-Azo Dyes, Synthesis, Characterization, Dying Performance and Antibacterial Activity Studies

    Directory of Open Access Journals (Sweden)

    Alya Khider Abbas

    2017-02-01

    Full Text Available The synthesis, structural spectroscopic properties of 4-(2-benzimidazolylazoproline (BMP and its complexes derived from [Cu(II, Ag(I and Au(III] salts were done. The mode of bonding for the complexes were accomplished based on elemental analysis, FTIR, UV-Vis and HNMR spectroscopy, magnetic measurement and molar conductivity. It has been found that the ligand (BMP behaves as N,N-neutral bidentate which was forming chelates with molar ratio (1:2 (M:L stoichiometry for [Cu(II and Ag(I] while Au(III complex form molar ratio (1:1 at optimum concentration and pH as well as (λmax. The stability constant and Gibbs free energy for the prepared complexes are evaluated by spectroscopic methods. The prepared ligand (BMP in comparison to its metal complexes, were screened for their antibacterial activity against two bacterial species, Escherichia Coli and Staphylococcus. Dying performance was also studied.

  15. [Assessment of executive/attentional performance in Asperger's disorder].

    Science.gov (United States)

    Kilinçaslan, Ayşe; Motavalli Mukaddes, Nahit; Sözen Küçükyazici, Gökçe; Gürvit, Hakan

    2010-01-01

    Deficient executive functioning (EF) has been reported in several neurodevelopmental disorders, including autistic spectrum disorders; however, many studies included heterogeneous groups and few have focused on EF in individuals with Asperger's disorder (AD) in relation to attentional performance. The aim of the present study was to compare executive/attentional performance in children and adolescents with AD to that in controls, and to assess the influence of comorbid attention deficit-hyperactivity disorder (ADHD) on that performance. In total, 21 individuals with AD aged between 8 and 16 years (diagnosed according to DSM-IV criteria) and 18 age- gender-, education-, and IQ-matched volunteer controls were administered the Continuous Performance Test (CPT), Wisconsin Card Sorting Test (WCST), Stroop Test, and verbal fluency tests. The participants with AD had more perseverative responses and errors, and fewer conceptual level responses, and generated fewer categories on the WCST. They also had lower phonological fluency scores, but were similar to the controls in terms of semantic fluency, CPT, and Stroop scores. Comparison of those with comorbid ADHD and those without ADHD (AD+ADHD and pure AD, respectively) revealed that the AD+ADHD subgroup had lower CPT, semantic fluency, and Stroop interference scores. The present study indicated a clear profile of a dysexecutive syndrome among the participants with AD and that ADHD comorbidity exacerbated deficits in attentional tasks.

  16. A Metric to Assess the Performance of MLIR Services

    Directory of Open Access Journals (Sweden)

    N. Moganarangan

    2014-03-01

    Full Text Available Information Retrieval plays a vital role in extraction of relevant information. Many researches have been working on for satisfying user needs, tough the problem arises when accessing multilingual information. This Multilingual environment provides a platform where a query can be formed in one language and the result can be in the same language and/or different languages. Performance evaluation of Information Retrieval for monolingual environments especially for English are developed and standardized from its inception. There is no specialized evaluation model available for evaluating the performance of services related to multilingual environments or systems. The unavailability of MLIR domain specific standards is a challenging task. This paper presented enhanced metric to assess the performance of MLIR systems over its counterpart IR metric. This analysis shows that the performance of the enhanced metric is better than the conventional metric. And also these metric can facilitate the researchers and developers to improve the quality of the MLIR systems in the present and future scenarios.

  17. Use of wearable technology for performance assessment: a validation study.

    Science.gov (United States)

    Papi, Enrica; Osei-Kuffour, Denise; Chen, Yen-Ming A; McGregor, Alison H

    2015-07-01

    The prevalence of osteoarthritis is increasing globally but current compliance with rehabilitation remains poor. This study explores whether wearable sensors can be used to provide objective measures of performance with a view to using them as motivators to aid compliance to osteoarthritis rehabilitation. More specifically, the use of a novel attachable wearable sensor integrated into clothing and inertial measurement units located in two different positions, at the waist and thigh pocket, was investigated. Fourteen healthy volunteers were asked to complete exercises adapted from a knee osteoarthritis rehabilitation programme whilst wearing the three sensors including five times sit-to-stand test, treadmill walking at slow, preferred and fast speeds. The performances of the three sensors were validated against a motion capture system and an instrumented treadmill. The systems showed a high correlation (r(2) > 0.7) and agreement (mean difference range: -0.02-0.03 m, 0.005-0.68 s) with gold standards. The novel attachable wearable sensor was able to monitor exercise tasks as well as the inertial measurement units (ICC > 0.95). Results also suggested that a functional placement (e.g., situated in a pocket) is a valid position for performance monitoring. This study shows the potential use of wearable technologies for assessing subject performance during exercise and suggests functional solutions to enhance acceptance.

  18. 2003 assessment of PCDDs-PCDFs emissions from the Copesul/South Petrochemical complex located in southern Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Deschamps, M.; Allard, J.L. [SNC-Lavalin Environment Inc., Montreal, PQ (Canada); Rangel, C.M.P.; Ribeiro, C.; Dos Santos, S.T.F. [Companhia Petroquimica do Sul, Triunfo (Brazil)

    2004-09-15

    COPESUL is the Raw Material and Utilities Central of the South Petrochemical Complex, this, being the most modern industrial facility of its type in Brazil, and the second largest naphtha cracker in the country. Responsible for more than 40% of Brazilian olefins production, it is also among the largest crackers (on the same site) in the world. The majority of COPESUL products are transformed by downstream industries of the Complex into thermoplastics resins, synthetic rubber, styrene and solvents that are widely used in the manufacturing of packing material (food, hygiene, cleaning), electronic appliances, medical and surgical supplies, toys and in the car industries, to be consumed in Brazil and foreign countries. At the request of the state of Rio Grande do Sul Environmental Protection Agency (Fundacao Estadual de Protecao Ambiental or FEPAM), an Environmental Assessment of Priority Pollutants (EAPP) was performed by Copesul at the end of the year 2003. EAPPs have been voluntarily performed at the Petrochemical Complex since 1986 on a basis of once every three year. It is now performed as a requirement which is part of the petrochemical plant operational license. Among the different (organic and inorganic) parameters tested, PCDDs-PCDFs remained a main concern to the local State Agency with regards to the Complex activities and of it's potential impact on the human health and the environment, despite the fact that the Complex does not use nor produce any organochlorinated product.

  19. VV&A and confidence assessment of a complex giant system simulation model

    Institute of Scientific and Technical Information of China (English)

    伞冶; 陈建明

    2004-01-01

    It is difficult or even impossible for a pure mathematical model to represent a complex giant system because of the complexity, activity, uncertainty in such a system. The meta-synthesis methodology and the generalized modelling method are used to model a complex giant system. This paper has an in-depth study on the confidence assessment of a complex giant system simulation model that is built based on the meta-synthesis methodology and the generalized modelling method. A new definition of VV&A for complex system is given, on which is based a -step reference model and proposed for VV&A purpose. Furthermore, the principle andmethod of intelligent boundary interval intermediate assessment is proposed for the harmonization of modelling and model-validation.

  20. Total System Performance Assessment - License Application Methods and Approach

    Energy Technology Data Exchange (ETDEWEB)

    J. McNeish

    2003-12-08

    ''Total System Performance Assessment-License Application (TSPA-LA) Methods and Approach'' provides the top-level method and approach for conducting the TSPA-LA model development and analyses. The method and approach is responsive to the criteria set forth in Total System Performance Assessment Integration (TSPAI) Key Technical Issues (KTIs) identified in agreements with the U.S. Nuclear Regulatory Commission, the ''Yucca Mountain Review Plan'' (YMRP), ''Final Report'' (NRC 2003 [163274]), and the NRC final rule 10 CFR Part 63 (NRC 2002 [156605]). This introductory section provides an overview of the TSPA-LA, the projected TSPA-LA documentation structure, and the goals of the document. It also provides a brief discussion of the regulatory framework, the approach to risk management of the development and analysis of the model, and the overall organization of the document. The section closes with some important conventions that are used in this document.

  1. Variables and Challenges in Assessing EU Experts’ Performance

    Directory of Open Access Journals (Sweden)

    Cathrine Holst

    2015-03-01

    Full Text Available Expert advice in political processes is supposed to improve decisions. If expertise fails in this function, a legitimacy problem occurs: granting political power to experts may be defensible, but only on the grounds that it contributes to enlightening political processes and facilitate problem-solving. The paper provides a theoretical exploration of four variables that are key when assessing the epistemic quality of expert deliberations: the degree to which these deliberations are 1 informed by technical expertise, 2 regulated by epistemically optimal respect and inclusion norms, 3 focused on politically relevant and applicable knowledge, and 4 approaching questions involving moral judgment and standard setting competently. Previous research on the European Commission’s use of expert advice has more or less overlooked the question of experts’ epistemic performance, and this paper discusses the possible reasons for this in light of well-known methodological challenges in studies of elite behaviour; access and bias problems. A discussion of the merits and limitations of different available data on the Commission experts shows that the biggest obstacle in the study of experts’ epistemic performance is rather the problem of epistemic asymmetry, i.e. of how researchers as non-experts can assess the epistemic quality of experts’ contributions and behaviour. The paper offers, finally, a set of strategies to get research going despite this problem.

  2. THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL

    Energy Technology Data Exchange (ETDEWEB)

    G. Saulnier and W. Statham

    2006-04-16

    The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. The Pena Blanca Natural Analogue Performance Assessment Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash-flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following analogous characteristics as compared to the Yucca Mountain repository site: (1) Analogous source--UO{sub 2} uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geology--(i.e. fractured, welded, and altered rhyolitic ash-flow tuffs); (3) Analogous climate--Semiarid to arid; (4) Analogous setting--Volcanic tuffs overlie carbonate rocks; and (5) Analogous geochemistry--Oxidizing conditions Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table.

  3. Envisat Ocean Altimetry Performance Assessment and Cross-calibration

    Science.gov (United States)

    Faugere, Yannice; Dorandeu, Joël; Lefevre, Fabien; Picot, Nicolas; Femenias, Pierre

    2006-01-01

    Nearly three years of Envisat altimetric observations over ocean are available in Geophysical Data Record (GDR) products. The quality assessment of these data is routinely performed at the CLS Space Oceanography Division in the frame of the CNES Segment Sol Altimétrie et Orbitographie (SSALTO) and ESA French Processing and Archiving Center (F-PAC) activities. This paper presents the main results in terms of Envisat data quality: verification of data availability and validity, monitoring of the most relevant altimeter (ocean1 retracking) and radiometer parameters, assessment of the Envisat altimeter system performances. This includes a cross-calibration analysis of Envisat data with Jason-1, ERS-2 and T/P. Envisat data show good general quality. A good orbit quality and a low level of noise allow Envisat to reach the high level of accuracy of other precise missions such as T/P and Jason-1. Some issues raised in this paper, as the gravity induced orbit errors, will be solved in the next version of GDR products. Some others, as the Envisat Mean Sea Level in the first year, still need further investigation.

  4. A new approach to underground cable performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Al-Saud, M.S.; El-Kady, M.A.; Findlay, R.D. [Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario L8S 4K1 (Canada)

    2008-05-15

    This paper presents a new approach to thermal field sensitivities and ampacity computations of underground power cables using a proposed algorithm of perturbed finite-element analysis. The new approach involves the use of derived sensitivity coefficients associated with various cable parameters of interest, and use these coefficients to achieve optimal cable performance. The proposed model provides a quick methodology, based on the finite-element model, to assess the cable thermal performance subject to variations in the cable thermal circuit parameters. The developed algorithm was applied to various practical cable systems. The effect of multilayered thermal conductivities and boundary parameters variations on the actual cable system ampacity was investigated using the proposed methodology. A comparison was made of the obtained results with the conventional finite-element approach in order to show the applicability and usefulness of the developed methodology. Our objective was to assess the effects of operating parameter variations in a straightforward manner, without repeating the thermal field analysis for each parameter change. The thermal field of an underground power cable sample directly buried in the soil was measured in the laboratory using a developed full-size experimental setup. The investigations involve all parts of the thermal circuit parameters representing cable composition, surrounding soil and boundary phenomena. The experimental setup was used to validate the simulation model by comparing the simulation results with the real laboratory measurements. Such experimental verification confirmed the accuracy of the new introduced finite-element sensitivity methodology. (author)

  5. Variables and Challenges in Assessing EU Experts’ Performance

    Directory of Open Access Journals (Sweden)

    Cathrine Holst

    2015-03-01

    Full Text Available Expert advice in political processes is supposed to improve decisions. If expertise fails in this function, a legitimacy problem occurs: granting political power to experts may be defensible, but only on the grounds that it contributes to enlightening political processes and facilitate problem-solving. The paper provides a theoretical exploration of four variables that are key when assessing the epistemic quality of expert deliberations: the degree to which these deliberations are 1 informed by technical expertise, 2 regulated by epistemically optimal respect and inclusion norms, 3 focused on politically relevant and applicable knowledge, and 4 approaching questions involving moral judgment and standard setting competently. Previous research on the European Commission’s use of expert advice has more or less overlooked the question of experts’ epistemic performance, and this paper discusses the possible reasons for this in light of well-known methodological challenges in studies of elite behaviour; access and bias problems. A discussion of the merits and limitations of different available data on the Commission experts shows that the biggest obstacle in the study of experts’ epistemic performance is rather the problem of epistemic asymmetry, i.e. of how researchers as non-experts can assess the epistemic quality of experts’ contributions and behaviour. The paper offers, finally, a set of strategies to get research going despite this problem.

  6. FIELD VALIDATION OF CORROSION RATES FOR LOW-LEVEL WASTE DISPOSAL PERFORMANCE ASSESSMENTS

    Energy Technology Data Exchange (ETDEWEB)

    Flitton, M.K. Adler; Seitz, R.R.

    2003-02-27

    Research is being conducted at the Idaho National Engineering and Environmental Laboratory to assess corrosion rates of metals in the subsurface environment in direct support of waste management operations and environmental restoration activities. This research addresses a need identified by Department of Energy-Headquarters when reviewing the performance assessment for the low-level waste disposal facility at the Radioactive Waste Management Complex. Corrosion rates are a key factor determining release rates of long-lived radionuclides from activated metal waste streams. Radionuclide releases from these wastes are key contributors to the projected long-term dose associated with the disposal facility. Short-term results from the corrosion samples buried for one and three years suggest that the corrosion rates assumed for the assessments are conservative. However, the rates appear to be increasing, thus, future retrievals of coupons will be used to identify whether the increasing trend continues.

  7. Models used to assess the performance of photovoltaic systems.

    Energy Technology Data Exchange (ETDEWEB)

    Stein, Joshua S.; Klise, Geoffrey T.

    2009-12-01

    This report documents the various photovoltaic (PV) performance models and software developed and utilized by researchers at Sandia National Laboratories (SNL) in support of the Photovoltaics and Grid Integration Department. In addition to PV performance models, hybrid system and battery storage models are discussed. A hybrid system using other distributed sources and energy storage can help reduce the variability inherent in PV generation, and due to the complexity of combining multiple generation sources and system loads, these models are invaluable for system design and optimization. Energy storage plays an important role in reducing PV intermittency and battery storage models are used to understand the best configurations and technologies to store PV generated electricity. Other researcher's models used by SNL are discussed including some widely known models that incorporate algorithms developed at SNL. There are other models included in the discussion that are not used by or were not adopted from SNL research but may provide some benefit to researchers working on PV array performance, hybrid system models and energy storage. The paper is organized into three sections to describe the different software models as applied to photovoltaic performance, hybrid systems, and battery storage. For each model, there is a description which includes where to find the model, whether it is currently maintained and any references that may be available. Modeling improvements underway at SNL include quantifying the uncertainty of individual system components, the overall uncertainty in modeled vs. measured results and modeling large PV systems. SNL is also conducting research into the overall reliability of PV systems.

  8. Assessment of performance indicators of a radiotherapy department using an electronic medical record system.

    Science.gov (United States)

    Bahadur, Yasir A; Constantinescu, Camelia; Bahadur, Ammar Y; Bahadur, Ruba Y

    2017-01-01

    To retrospectively assess the performance indicators of our radiotherapy department and their temporal trends, using a commercially available electronic-medical-record (EMR) system. A recent trend in healthcare quality is to define and evaluate performance indicators of the service provided. Patient and external-beam-radiotherapy-treatments data were retrieved using the Mosaiq EMR system from 1-January-2012 till 31-December-2015. Annual performance indicators were evaluated as: productivity (number of new cases/year and diagnosis distribution); complexity (ratio of Volumetric-Modulated-Arc-Therapy (VMAT) courses, average number of imaging procedures/patient); and quality (average, median and 90th percentile waiting times from admission to first treatment). The temporal trends of all performance indicators were assessed by linear regression. Productivity: the number of new cases/year increased with an average rate of 4%. Diagnosis distribution showed that breast is the main pathology treated, followed by gastro-intestinal and head-and-neck. Complexity: the ratio of VMAT courses increased from 13% to 35%, with an average rate of 7% per year. The average number of imaging procedures/patient increased from 8 to 11. Quality: the waiting times from admission to treatment remained stable over time (R(2) ≤ 0.1), with average, median and 90th percentile values around 20, 15, and 31 days, respectively. An EMR system can be used to: monitor the performance indicators of a radiotherapy department, identify workflow processes needing attention and improvement, estimate future demands of resources. Temporal analysis of our data showed an increasing trend in productivity and complexity paired with constant waiting times.

  9. Students' conceptual performance on synthesis physics problems with varying mathematical complexity

    Science.gov (United States)

    Ibrahim, Bashirah; Ding, Lin; Heckler, Andrew F.; White, Daniel R.; Badeau, Ryan

    2017-06-01

    A body of research on physics problem solving has focused on single-concept problems. In this study we use "synthesis problems" that involve multiple concepts typically taught in different chapters. We use two types of synthesis problems, sequential and simultaneous synthesis tasks. Sequential problems require a consecutive application of fundamental principles, and simultaneous problems require a concurrent application of pertinent concepts. We explore students' conceptual performance when they solve quantitative synthesis problems with varying mathematical complexity. Conceptual performance refers to the identification, follow-up, and correct application of the pertinent concepts. Mathematical complexity is determined by the type and the number of equations to be manipulated concurrently due to the number of unknowns in each equation. Data were collected from written tasks and individual interviews administered to physics major students (N =179 ) enrolled in a second year mechanics course. The results indicate that mathematical complexity does not impact students' conceptual performance on the sequential tasks. In contrast, for the simultaneous problems, mathematical complexity negatively influences the students' conceptual performance. This difference may be explained by the students' familiarity with and confidence in particular concepts coupled with cognitive load associated with manipulating complex quantitative equations. Another explanation pertains to the type of synthesis problems, either sequential or simultaneous task. The students split the situation presented in the sequential synthesis tasks into segments but treated the situation in the simultaneous synthesis tasks as a single event.

  10. Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance

    Energy Technology Data Exchange (ETDEWEB)

    Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew; Jonsson, Ph.D., Jacob

    2011-01-21

    We describe two methods which rely on bidirectional scattering distribution functions (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater flexibility and accuracy in evaluating arbitrary assemblies of glazing, shading, and other optically-complex coplanar window systems. Two tools within Radiance enable a) efficient annual performance evaluations of CFS, and b) accurate renderings of CFS despite the loss of spatial resolution associated with low-resolution BSDF datasets for inhomogeneous systems. Validation, accuracy, and limitations of the methods are discussed.

  11. Assessment of performance of survival prediction models for cancer prognosis

    Directory of Open Access Journals (Sweden)

    Chen Hung-Chia

    2012-07-01

    Full Text Available Abstract Background Cancer survival studies are commonly analyzed using survival-time prediction models for cancer prognosis. A number of different performance metrics are used to ascertain the concordance between the predicted risk score of each patient and the actual survival time, but these metrics can sometimes conflict. Alternatively, patients are sometimes divided into two classes according to a survival-time threshold, and binary classifiers are applied to predict each patient’s class. Although this approach has several drawbacks, it does provide natural performance metrics such as positive and negative predictive values to enable unambiguous assessments. Methods We compare the survival-time prediction and survival-time threshold approaches to analyzing cancer survival studies. We review and compare common performance metrics for the two approaches. We present new randomization tests and cross-validation methods to enable unambiguous statistical inferences for several performance metrics used with the survival-time prediction approach. We consider five survival prediction models consisting of one clinical model, two gene expression models, and two models from combinations of clinical and gene expression models. Results A public breast cancer dataset was used to compare several performance metrics using five prediction models. 1 For some prediction models, the hazard ratio from fitting a Cox proportional hazards model was significant, but the two-group comparison was insignificant, and vice versa. 2 The randomization test and cross-validation were generally consistent with the p-values obtained from the standard performance metrics. 3 Binary classifiers highly depended on how the risk groups were defined; a slight change of the survival threshold for assignment of classes led to very different prediction results. Conclusions 1 Different performance metrics for evaluation of a survival prediction model may give different conclusions in

  12. Assessment of porous asphalt pavement performance: hydraulics and water quality

    Science.gov (United States)

    Briggs, J. F.; Ballestero, T. P.; Roseen, R. M.; Houle, J. J.

    2005-05-01

    The objective of this study is to focus on the water quality treatment and hydraulic performance of a porous asphalt pavement parking lot in Durham, New Hampshire. The site was constructed in October 2004 to assess the suitability of porous asphalt pavement for stormwater management in cold climates. The facility consists of a 4-inch asphalt open-graded friction course layer overlying a high porosity sand and gravel base. This base serves as a storage reservoir in-between storms that can slowly infiltrate groundwater. Details on the design, construction, and cost of the facility will be presented. The porous asphalt pavements is qualitatively monitored for signs of distress, especially those due to cold climate stresses like plowing, sanding, salting, and freeze-thaw cycles. Life cycle predictions are discussed. Surface infiltration rates are measured with a constant head device built specifically to test high infiltration capacity pavements. The test measures infiltration rates in a single 4-inch diameter column temporarily sealed to the pavement at its base. A surface inundation test, as described by Bean, is also conducted as a basis for comparison of results (Bean, 2004). These tests assess infiltration rates soon after installation, throughout the winter, during snowmelt, after a winter of salting, sanding, and plowing, and after vacuuming in the spring. Frost penetration into the subsurface reservoir is monitored with a frost gauge. Hydrologic effects of the system are evaluated. Water levels are monitored in the facility and in surrounding wells with continuously logging pressure transducers. The 6-inch underdrain pipe that conveys excess water in the subsurface reservoir to a riprap pad is also continuously monitored for flow. Since porous asphalt pavement systems infiltrate surface water into the subsurface, it is important to assess whether water quality treatment performance in the subsurface reservoir is adequate. The assumed influent water quality is

  13. Performance assessment for the class L-II disposal facility

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This draft radiological performance assessment (PA) for the proposed Class L-II Disposal Facility (CIIDF) on the Oak Ridge Reservation (ORR) has been prepared to demonstrate compliance with the requirements of the US Department of Energy Order 5820.2A. This PA considers the disposal of low-level radioactive wastes (LLW) over the operating life of the facility and the long-term performance of the facility in providing protection to public health and the environment. The performance objectives contained in the order require that the facility be managed to accomplish the following: (1) Protect public health and safety in accordance with standards specified in environmental health orders and other DOE orders. (2) Ensure that external exposure to the waste and concentrations of radioactive material that may be released into surface water, groundwater, soil, plants, and animals results in an effective dose equivalent (EDE) that does not exceed 25 mrem/year to a member of the public. Releases to the atmosphere shall meet the requirements of 40 CFR Pt. 61. Reasonable effort should be made to maintain releases of radioactivity in effluents to the general environment as low as reasonably achievable. (1) Ensure that the committed EDEs received by individual who inadvertently may intrude into the facility after the loss of active institutional control (100 years) will not exceed 100 mrem/year for continuous exposure of 500 mrem for a single acute exposure. (4) Protect groundwater resources, consistent with federal, state, and local requirements.

  14. Performance Assessment and Authentic Assessment: A Conceptual Analysis of the Literature

    Directory of Open Access Journals (Sweden)

    Torulf Palm

    2008-04-01

    Full Text Available Performance assessment and authentic assessment are recurrent terms in the literature on education and educational research. They have both been given a number of different meanings and unclear definitions and are in some publications not defined at all. Such uncertainty of meaning causes difficulties in interpretation and communication and can cause clouded or misleading research conclusions. This paper reviews the meanings attached to these concepts in the literature and describes the similarities and wide range of differences between the meanings of each concept.

  15. Assessing the density functional theory-based multireference configuration interaction (DFT/MRCI) method for transition metal complexes.

    Science.gov (United States)

    Escudero, Daniel; Thiel, Walter

    2014-05-21

    We report an assessment of the performance of density functional theory-based multireference configuration interaction (DFT/MRCI) calculations for a set of 3d- and 4d-transition metal (TM) complexes. The DFT/MRCI results are compared to published reference data from reliable high-level multi-configurational ab initio studies. The assessment covers the relative energies of different ground-state minima of the highly correlated CrF6 complex, the singlet and triplet electronically excited states of seven typical TM complexes (MnO4(-), Cr(CO)6, [Fe(CN)6](4-), four larger Fe and Ru complexes), and the corresponding electronic spectra (vertical excitation energies and oscillator strengths). It includes comparisons with results from different flavors of time-dependent DFT (TD-DFT) calculations using pure, hybrid, and long-range corrected functionals. The DFT/MRCI method is found to be superior to the tested TD-DFT approaches and is thus recommended for exploring the excited-state properties of TM complexes.

  16. A Case Study of Teacher Personal Practice Assessment Theories and Complexities of Implementing Formative Assessment

    Science.gov (United States)

    Box, Cathy; Skoog, Gerald; Dabbs, Jennifer M.

    2015-01-01

    The value and effectiveness of formative assessment in the classroom has gained an increasing amount of attention during the past decade, especially since the publication of seminal work by Black and Wiliam titled "Assessment and Classroom Learning." Since that time, there has been a renewed interest in describing and evaluating teacher…

  17. A Case Study of Teacher Personal Practice Assessment Theories and Complexities of Implementing Formative Assessment

    Science.gov (United States)

    Box, Cathy; Skoog, Gerald; Dabbs, Jennifer M.

    2015-01-01

    The value and effectiveness of formative assessment in the classroom has gained an increasing amount of attention during the past decade, especially since the publication of seminal work by Black and Wiliam titled "Assessment and Classroom Learning." Since that time, there has been a renewed interest in describing and evaluating teacher…

  18. Iranian Expert Opinion about Necessary Criteria for Hospitals Management Performance Assessments

    Directory of Open Access Journals (Sweden)

    Elham Dadgar

    2012-12-01

    Full Text Available Background: Managers in the hospital should have enough managerial skill to be coordinated with the complex environment. Defining a competency framework assessment for hospital man-agement will help to establish core competencies for hospital managers. The aim of this study was to develop concrete and suitable performance assessment criteria using expert's view.Methods: In this qualitative study in total, 20 professionals participated in the interview and Fo-cus Group Discussions (FGD. Two of informants were interviewed and 18 professionals par-ticipants in three focus group discussions. Discussions and interviews were well planned, the FGD environments were suitable and after interviews completion the notes were checked with participant for completeness. Thematic analysis method was used for the analysis of qualitative data.Results: Findings from 3 FGDs and 2 semi structured interviews done with 20 professionals were categorized accordance to themes. The findings were classified in 7 major and 41 sub themes. The major themes include competency related to planning, organization and staff per-formance management, leadership, information management, and clinical governance and per-formance indicators.Conclusion: All participants had hospital administration experience; so their explanation impor-tant in identifying the criteria and developing hospital managers’ performance assessment tool. In addition to professional perspectives and studies done in other countries, in order to design this kind of tools, it is necessary to adopt the obtained findings to the local hospital conditions.

  19. Measuring working memory in aphasia: Comparing performance on complex span and N-back tasks

    Directory of Open Access Journals (Sweden)

    Maria Ivanova

    2014-04-01

    No significant correlations were observed between performance on complex span task and N-back tasks.Furthermore, performance on the modified listening span was related to performance on the comprehension subtest of the QASA, while no relationship was found for 2-back and 0-back tasks.Our results mirror studies in healthy controls that demonstrated no relationship between performance on the two tasks(Jaeggi et al., 2010; Kane et al., 2007. Thus although N-back tasks seem similar to traditional complex span measures and may also index abilities related to cognitive processing, the evidence to date does not warrant their direct association with the construct of WM. Implications for future investigation of cognitive deficits in aphasia will be discussed.

  20. Denoising performance of modified dual-tree complex wavelet transform for processing quadrature embolic Doppler signals.

    Science.gov (United States)

    Serbes, Gorkem; Aydin, Nizamettin

    2014-01-01

    Quadrature signals are dual-channel signals obtained from the systems employing quadrature demodulation. Embolic Doppler ultrasound signals obtained from stroke-prone patients by using Doppler ultrasound systems are quadrature signals caused by emboli, which are particles bigger than red blood cells within circulatory system. Detection of emboli is an important step in diagnosing stroke. Most widely used parameter in detection of emboli is embolic signal-to-background signal ratio. Therefore, in order to increase this ratio, denoising techniques are employed in detection systems. Discrete wavelet transform has been used for denoising of embolic signals, but it lacks shift invariance property. Instead, dual-tree complex wavelet transform having near-shift invariance property can be used. However, it is computationally expensive as two wavelet trees are required. Recently proposed modified dual-tree complex wavelet transform, which reduces the computational complexity, can also be used. In this study, the denoising performance of this method is extensively evaluated and compared with the others by using simulated and real quadrature signals. The quantitative results demonstrated that the modified dual-tree-complex-wavelet-transform-based denoising outperforms the conventional discrete wavelet transform with the same level of computational complexity and exhibits almost equal performance to the dual-tree complex wavelet transform with almost half computational cost.

  1. ASYMMETRIC PRICE TRANSMISSION MODELING: THE IMPORTANCE OF MODEL COMPLEXITY AND THE PERFORMANCE OF THE SELECTION CRITERIA

    Directory of Open Access Journals (Sweden)

    Henry de-Graft Acquah

    2013-01-01

    Full Text Available Information Criteria provides an attractive basis for selecting the best model from a set of competing asymmetric price transmission models or theories. However, little is understood about the sensitivity of the model selection methods to model complexity. This study therefore fits competing asymmetric price transmission models that differ in complexity to simulated data and evaluates the ability of the model selection methods to recover the true model. The results of Monte Carlo experimentation suggest that in general BIC, CAIC and DIC were superior to AIC when the true data generating process was the standard error correction model, whereas AIC was more successful when the true model was the complex error correction model. It is also shown that the model selection methods performed better in large samples for a complex asymmetric data generating process than with a standard asymmetric data generating process. Except for complex models, AIC's performance did not make substantial gains in recovery rates as sample size increased. The research findings demonstrate the influence of model complexity in asymmetric price transmission model comparison and selection.

  2. Using a plant health system framework to assess plant clinic performance in Uganda

    DEFF Research Database (Denmark)

    Danielsen, Solveig; Matsiko, Frank B.

    2016-01-01

    Systems thinking is commonly applied to understand the complexities of human healthcare delivery. In contrast, plant health systems as an organising principle have evolved more recently from work with plant clinics as providers of plant healthcare services to farmers. As plant health systems evolve...... and expand, new analytical frameworks and tools are needed to identify factors influencing performance of services and systems in specific contexts, and to guide interventions. In this paper we apply a plant health system framework to assess plant clinic performance, using Uganda as a case study....... A comparative study of plant clinics was carried out between July 2010 and September 2011 in the 12 districts where plant clinics were operating at that time. The framework enabled us to organise multiple issues and identify key features that affected the plant clinics. Clinic performance was, among other...

  3. Relationship between Usefulness Assessments and Perceptions of Work Task Complexity and Search Topic Specificity: An Exploratory Study

    DEFF Research Database (Denmark)

    Ingwersen, Peter; Wang, Peiling

    2012-01-01

    This research investigates the relations between the usefulness assessments of retrieved documents and the perceptions of task complexity and search topic specificity. Twenty-three academic researchers submitted 65 real task-based information search topics. These task topics were searched...... in an integrated document collection consisting of full text research articles in PDFs, abstracts, and bibliographic records (the iSearch Test Collection in Physics). The search results were provided to the researchers who, as task performers, made assessments of usefulness using a four-point sale (highly, fairly...... highly complex tasks tend to associate with search topics of high specificity. Although bibliographic records show better precisions than full text PDF documents, the latter contributed more useful documents. Suggestions are made for further studies in naturalist IR experiments....

  4. Does model performance improve with complexity? A case study with three hydrological models

    Science.gov (United States)

    Orth, Rene; Staudinger, Maria; Seneviratne, Sonia I.; Seibert, Jan; Zappa, Massimiliano

    2015-04-01

    In recent decades considerable progress has been made in climate model development. Following the massive increase in computational power, models became more sophisticated. At the same time also simple conceptual models have advanced. In this study we validate and compare three hydrological models of different complexity to investigate whether their performance varies accordingly. For this purpose we use runoff and also soil moisture measurements, which allow a truly independent validation, from several sites across Switzerland. The models are calibrated in similar ways with the same runoff data. Our results show that the more complex models HBV and PREVAH outperform the simple water balance model (SWBM) in case of runoff but not for soil moisture. Furthermore the most sophisticated PREVAH model shows an added value compared to the HBV model only in case of soil moisture. Focusing on extreme events we find generally improved performance of the SWBM during drought conditions and degraded agreement with observations during wet extremes. For the more complex models we find the opposite behavior, probably because they were primarily developed for prediction of runoff extremes. As expected given their complexity, HBV and PREVAH have more problems with over-fitting. All models show a tendency towards better performance in lower altitudes as opposed to (pre-) alpine sites. The results vary considerably across the investigated sites. In contrast, the different metrics we consider to estimate the agreement between models and observations lead to similar conclusions, indicating that the performance of the considered models is similar at different time scales as well as for anomalies and long-term means. We conclude that added complexity does not necessarily lead to improved performance of hydrological models, and that performance can vary greatly depending on the considered hydrological variable (e.g. runoff vs. soil moisture) or hydrological conditions (floods vs. droughts).

  5. Noise Affects Performance on the Montreal Cognitive Assessment.

    Science.gov (United States)

    Dupuis, Kate; Marchuk, Veronica; Pichora-Fuller, M Kathleen

    2016-09-01

    We investigated the effect of background noise on performance on the Montreal Cognitive Assessment (MoCA). Two groups of older adults (one with clinically normal hearing, one with hearing loss) and a younger adult group with clinically normal hearing were administered two versions of the MoCA under headphones in low and high levels of background noise. Intensity levels used to present the test were customized based on the hearing abilities of participants with hearing loss to yield a uniform level of difficulty across listeners in the high-level noise condition. Both older groups had poorer MoCA scores in noise than the younger group. Importantly, all participants had poorer MoCA scores in the high-noise (M = 22.7/30) compared to the low-noise condition (M = 25.7/30, p noise in the test environment should be considered when cognitive tests are conducted and results interpreted, especially when testing older adults.

  6. SITE-94. Site specific base data for the performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Geier, J. [ed.] [Clearwater Hardrock Consulting, Monmouth, OR (United States); Tiren, S. [Geosigma AB, Uppsala (Sweden); Dverstorp, B. [Swedish Nuclear Power Inspectorate, Stockholm (Sweden); Glynn, P. [U.S. Geological Survey, Reston, VA (United States)

    1996-06-01

    This report documents the site specific base data that were available, and the utilization of these data within SITE-94. A brief summary is given of SKB`s preliminary site investigations for the Aespoe Hard Rock Laboratory (HRL), which were the main source of site-specific data for SITE-94, and an overview is given of the field methods and instrumentation for the preliminary investigations. A compilation is given of comments concerning the availability and quality of the data for Aespoe, and specific recommendations are given for future site investigations. It was found that the HRL pre-investigations produced a large quantity of data which were, for the most part, of sufficient quality to be valuable for a performance assessment. However, some problems were encountered regarding documentation, procedural consistency, positional information, and storage of the data from the measurements. 77 refs, 4 tabs.

  7. Assessment of performance of UV sterilizer for room air bacteria.

    Science.gov (United States)

    Joshi, P V

    2002-02-01

    Paper presents a technique for performance of UV sterilizer for room air bacteria. Patterns of decay of room air bacteria concentration during sterilization and build-up there after as a function of time is studied. Decay process seems to follow exponential pattern. Half-lives during decay are estimated. For single sterilizer unit with a dose of 16 W the decay half-life is around 8.6 min. For the dose of 32 W (2 sterilizers), half-life is estimated to be 6.18 min. The removal rates of room air bacteria due to sterilizer are compared with the natural decay of aerosols at steady state. The importance of decay half-life in the assessment has been stated. The bacteria concentration buildup process after putting off the sterilizers seems to be sigmoidal in nature. The buildup half-life is estimated to be around 53 min for present experimental conditions.

  8. Image Quality Assessment for Performance Evaluation of Focus Measure Operators

    Directory of Open Access Journals (Sweden)

    Farida Memon

    2015-10-01

    Full Text Available This paper presents the performance evaluation of eight focus measure operators namely Image CURV (Curvature, GRAE (Gradient Energy, HISE (Histogram Entropy, LAPM (Modified Laplacian, LAPV (Variance of Laplacian, LAPD (Diagonal Laplacian, LAP3 (Laplacian in 3D Window and WAVS (Sum of Wavelet Coefficients. Statistical matrics such as MSE (Mean Squared Error, PNSR (Peak Signal to Noise Ratio, SC (Structural Content, NCC (Normalized Cross Correlation, MD (Maximum Difference and NAE (Normalized Absolute Error are used to evaluate stated focus measures in this research. . FR (Full Reference method of the image quality assessment is utilized in this paper. Results indicate that LAPD method is comparatively better than other seven focus operators at typical imaging conditions

  9. Lattice Sequential Decoder for Coded MIMO Channel: Performance and Complexity Analysis

    CERN Document Server

    Abediseid, Walid

    2011-01-01

    In this paper, the performance limit of lattice sequential decoder for lattice space-time coded MIMO channel is analysed. We determine the rates achievable by lattice coding and sequential decoding applied to such channel. The diversity-multiplexing tradeoff (DMT) under lattice sequential decoding is derived as a function of its parameter---the bias term. The bias parameter is critical for controlling the amount of computations required at the decoding stage. Achieving low decoding complexity requires increasing the value of the bias term. However, this is done at the expense of losing the optimal tradeoff of the channel. We show how such a decoder can bridge the gap between lattice decoder and low complexity decoders. Moreover, the computational complexity of lattice sequential decoder is analysed. Specifically, we derive the tail distribution of the decoder's computational complexity in the high signal-to-noise ratio regime. Similar to the conventional sequential decoder used in discrete memoryless channel,...

  10. Photophysical performance comparison between bulk Cu(I) complex and its electrospinning fibers: Synthesis and characterization

    Science.gov (United States)

    Pu, Wan; Yuqing, Zhao; Lisha, Wang

    2016-12-01

    In this report, a diamine ligand having an electron-pulling group in its conjugation plane was designed. A methyl group was connected with this diamine ligand, hoping to further increase its steric hindrance. Its Cu(I) complex was synthesized and characterized by NMR, single crystal analysis and photophysical analysis. There was a distorted tetrahedral coordination field in this Cu(I) complex. Its onset electronic transition owned a mixed character of metal-to-ligand-charge-transfer which suffered from bad geometric relaxation. To limit this geometric relaxation and improve emissive performance, this Cu(I) complex was doped into a polymer host through electrospinning technique. Photophysical comparison between solid state sample, solution sample and composite samples indicated that excited state geometric relaxation was effectively limited by polymer immobilization effect, resulting in improved emissive performance, such as emission blue shift, long emission decay lifetime and better photostability.

  11. The N2-P3 complex of the evoked potential and human performance

    Science.gov (United States)

    Odonnell, Brian F.; Cohen, Ronald A.

    1988-01-01

    The N2-P3 complex and other endogenous components of human evoked potential provide a set of tools for the investigation of human perceptual and cognitive processes. These multidimensional measures of central nervous system bioelectrical activity respond to a variety of environmental and internal factors which have been experimentally characterized. Their application to the analysis of human performance in naturalistic task environments is just beginning. Converging evidence suggests that the N2-P3 complex reflects processes of stimulus evaluation, perceptual resource allocation, and decision making that proceed in parallel, rather than in series, with response generation. Utilization of these EP components may provide insights into the central nervous system mechanisms modulating task performance unavailable from behavioral measures alone. The sensitivity of the N2-P3 complex to neuropathology, psychopathology, and pharmacological manipulation suggests that these components might provide sensitive markers for the effects of environmental stressors on the human central nervous system.

  12. Quality assessment and performance improvement in transplantation: hype or hope?

    Science.gov (United States)

    Reich, David J

    2013-04-01

    Healthcare reform and the national quality strategy is increasingly impacting transplant practice, as exemplified by quality assessment and performance improvement (QAPI) regulations for pretransplant and posttransplant care. Transplant providers consider not just patient comorbidities, donor quality, and business constraints, but also regulatory mandates when deciding how to care for transplant candidates and recipients. This review describes transplant quality oversight agencies and regulations, and explores recent literature on the pros and cons of transplant QAPI. Transplant's heavily regulated system of care and remuneration involves extensive QAPI process and outcome requirements, and assessment of lifelong, risk-adjusted data from the national, audited, publicly reported, electronic registry. Transplant is a model-integrated delivery system, with payment bundling and accountability for equitable access to high quality, efficient, cost-sensitive, and multidisciplinary care. However, transplant QAPI requires expensive resources and, to bolster wise risk-taking, novel treatments, and access to care, more nuanced risk adjustment, public reporting, and attention to geographic competitive variability. However, transplant QAPI requires expensive resources. In order to bolster wise risk-taking, novel treatments, and access to care, QAPI also requires more nuance in the areas of risk adjustment, public reporting, and attention to geographic competitive variability. With its focus on innovation and on clinical outcomes, transplantation is poised to continue providing outstanding clinical care and to pioneering systems that advance patient safety, satisfaction, and resource utilization, leading in the field of QAPI and healthcare reform.

  13. Peracetic acid for secondary effluent disinfection: a comprehensive performance assessment.

    Science.gov (United States)

    Antonelli, M; Turolla, A; Mezzanotte, V; Nurizzo, C

    2013-01-01

    The paper is a review of previous research on secondary effluent disinfection by peracetic acid (PAA) integrated with new data about the effect of a preliminary flash-mixing step. The process was studied at bench and pilot scale to assess its performance for discharge in surface water and agricultural reuse (target microorganisms: Escherichia coli and faecal coliform bacteria). The purposes of the research were: (1) determining PAA decay and disinfection kinetics as a function of operating parameters, (2) evaluating PAA suitability as a disinfectant, (3) assessing long-term disinfection efficiency, (4) investigating disinfected effluent biological toxicity on some aquatic indicator organisms (Vibrio fischeri, Daphnia magna and Selenastrum capricornutum), (5) comparing PAA with conventional disinfectants (sodium hypochlorite, UV irradiation). PAA disinfection was capable of complying with Italian regulations on reuse (10 CFU/100 mL for E. coli) and was competitive with benchmarks. No regrowth phenomena were observed, as long as needed for agricultural reuse (29 h after disinfection), even at negligible concentrations of residual disinfectant. The toxic effect of PAA on the aquatic environment was due to the residual disinfectant in the water, rather than to chemical modification of the effluent.

  14. Computational Performance Assessment of k-mer Counting Algorithms.

    Science.gov (United States)

    Pérez, Nelson; Gutierrez, Miguel; Vera, Nelson

    2016-04-01

    This article is about the assessment of several tools for k-mer counting, with the purpose to create a reference framework for bioinformatics researchers to identify computational requirements, parallelizing, advantages, disadvantages, and bottlenecks of each of the algorithms proposed in the tools. The k-mer counters evaluated in this article were BFCounter, DSK, Jellyfish, KAnalyze, KHMer, KMC2, MSPKmerCounter, Tallymer, and Turtle. Measured parameters were the following: RAM occupied space, processing time, parallelization, and read and write disk access. A dataset consisting of 36,504,800 reads was used corresponding to the 14th human chromosome. The assessment was performed for two k-mer lengths: 31 and 55. Obtained results were the following: pure Bloom filter-based tools and disk-partitioning techniques showed a lesser RAM use. The tools that took less execution time were the ones that used disk-partitioning techniques. The techniques that made the major parallelization were the ones that used disk partitioning, hash tables with lock-free approach, or multiple hash tables.

  15. Standardized assessment of infrared thermographic fever screening system performance

    Science.gov (United States)

    Ghassemi, Pejhman; Pfefer, Joshua; Casamento, Jon; Wang, Quanzeng

    2017-03-01

    Thermal modalities represent the only currently viable mass fever screening approach for outbreaks of infectious disease pandemics such as Ebola and SARS. Non-contact infrared thermometers (NCITs) and infrared thermographs (IRTs) have been previously used for mass fever screening in transportation hubs such as airports to reduce the spread of disease. While NCITs remain a more popular choice for fever screening in the field and at fixed locations, there has been increasing evidence in the literature that IRTs can provide greater accuracy in estimating core body temperature if appropriate measurement practices are applied - including the use of technically suitable thermographs. Therefore, the purpose of this study was to develop a battery of evaluation test methods for standardized, objective and quantitative assessment of thermograph performance characteristics critical to assessing suitability for clinical use. These factors include stability, drift, uniformity, minimum resolvable temperature difference, and accuracy. Two commercial IRT models were characterized. An external temperature reference source with high temperature accuracy was utilized as part of the screening thermograph. Results showed that both IRTs are relatively accurate and stable (reading with stability of +/-0.05°C). Overall, results of this study may facilitate development of standardized consensus test methods to enable consistent and accurate use of IRTs for fever screening.

  16. Performance and Complexity of Tunable Sparse Network Coding with Gradual Growing Tuning Functions over Wireless Networks

    DEFF Research Database (Denmark)

    Garrido, Pablo; Sørensen, Chres Wiant; Roetter, Daniel Enrique Lucani;

    2016-01-01

    a trade-off between computational complexity and goodput. An optimal density tuning function has not been found yet, due to the lack of a closed-form expression that links density, performance and computational cost. In addition, it would be difficult to implement, due to the feedback delay. In this work...

  17. The Effect of Focus on Form and Task Complexity on L2 Learners' Oral Task Performance

    Science.gov (United States)

    Salimi, Asghar

    2015-01-01

    Second Language learners' oral task performance has been one of interesting and research generating areas of investigations in the field of second language acquisition specially, task-based language teaching and learning. The main purpose of the present study is to investigate the effect of focus on form and task complexity on L2 learners' oral…

  18. Proficiency and Linguistic Complexity Influence Speech Motor Control and Performance in Spanish Language Learners

    Science.gov (United States)

    Nip, Ignatius S. B.; Blumenfeld, Henrike K.

    2015-01-01

    Purpose: Second-language (L2) production requires greater cognitive resources to inhibit the native language and to retrieve less robust lexical representations. The current investigation identifies how proficiency and linguistic complexity, specifically syntactic and lexical factors, influence speech motor control and performance. Method: Speech…

  19. Proficiency and Linguistic Complexity Influence Speech Motor Control and Performance in Spanish Language Learners

    Science.gov (United States)

    Nip, Ignatius S. B.; Blumenfeld, Henrike K.

    2015-01-01

    Purpose: Second-language (L2) production requires greater cognitive resources to inhibit the native language and to retrieve less robust lexical representations. The current investigation identifies how proficiency and linguistic complexity, specifically syntactic and lexical factors, influence speech motor control and performance. Method: Speech…

  20. CyNC - towards a General Tool for Performance Analysis of Complex Distributed Real Time Systems

    DEFF Research Database (Denmark)

    Schiøler, Henrik; Jessen, Jan Jakob; Nielsen, Jens F. Dalsgaard

    2005-01-01

    The paper addresses the current state and the ongoing activities of a tool for performance analysis of complex real time systems. The tool named CyNC is based on network calculus allowing for the computation of backlogs and delays in a system from specified lower and upper bounds of external...

  1. 42 CFR 493.1467 - Condition: Laboratories performing high complexity testing; cytology general supervisor.

    Science.gov (United States)

    2010-10-01

    ... testing; cytology general supervisor. 493.1467 Section 493.1467 Public Health CENTERS FOR MEDICARE....1467 Condition: Laboratories performing high complexity testing; cytology general supervisor. For the subspecialty of cytology, the laboratory must have a general supervisor who meets the qualification...

  2. 42 CFR 493.1441 - Condition: Laboratories performing high complexity testing; laboratory director.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 5 2010-10-01 2010-10-01 false Condition: Laboratories performing high complexity testing; laboratory director. 493.1441 Section 493.1441 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) STANDARDS AND CERTIFICATION...

  3. The method of educational assessment affects children's neural processing and performance: behavioural and fMRI Evidence

    Science.gov (United States)

    Howard, Steven J.; Burianová, Hana; Calleia, Alysha; Fynes-Clinton, Samuel; Kervin, Lisa; Bokosmaty, Sahar

    2017-08-01

    Standardised educational assessments are now widespread, yet their development has given comparatively more consideration to what to assess than how to optimally assess students' competencies. Existing evidence from behavioural studies with children and neuroscience studies with adults suggest that the method of assessment may affect neural processing and performance, but current evidence remains limited. To investigate the impact of assessment methods on neural processing and performance in young children, we used functional magnetic resonance imaging to identify and quantify the neural correlates during performance across a range of current approaches to standardised spelling assessment. Results indicated that children's test performance declined as the cognitive load of assessment method increased. Activation of neural nodes associated with working memory further suggests that this performance decline may be a consequence of a higher cognitive load, rather than the complexity of the content. These findings provide insights into principles of assessment (re)design, to ensure assessment results are an accurate reflection of students' true levels of competency.

  4. Clarifying the Blurred Image: Estimating the Inter-Rater Reliability of Performance Assessments.

    Science.gov (United States)

    Moore, Alan D.; Young, Suzanne

    As schools move toward performance assessment, there is increasing discussion of using these assessments for accountability purposes. When used for making decisions, performance assessments must meet high standards of validity and reliability. One major source of unreliability in performance assessments is interrater disagreement. In this paper,…

  5. Performance assessment instrument to assess the senior high students' psychomotor for the salt hydrolysis material

    Science.gov (United States)

    Nahadi, Firman, Harry; Yulina, Erlis

    2016-02-01

    The purposes of this study were to develop a performance assessment instrument for assessing the competence of psychomotor high school students on salt hydrolysis concepts. The design used in this study was the Research & Development which consists of three phases: development, testing and application of instruments. Subjects in this study were high school students in class XI science, which amounts to 93 students. In the development phase, seven validators validated 17 tasks instrument. In the test phase, we divided 19 students into three-part different times to conduct performance test in salt hydrolysis lab work and observed by six raters. The first, the second, and the third groups recpectively consist of five, six, and eight students. In the application phase, two raters observed the performance of 74 students in the salt hydrolysis lab work in several times. The results showed that 16 of 17 tasks of performance assessment instrument developed can be stated to be valid with CVR value of 1,00 and 0,714. While, the rest was not valid with CVR value was 0.429, below the critical value (0.622). In the test phase, reliability value of instrument obtained were 0,951 for the five-student group, 0,806 for the six-student group and 0,743 for the eight-student group. From the interviews, teachers strongly agree with the performance instrument developed. They stated that the instrument was feasible to use for maximum number of students were six in a single observation.

  6. Dose estimates for the solid waste performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Rittman, P.D.

    1994-08-30

    The Solid Waste Performance Assessment calculations by PNL in 1990 were redone to incorporate changes in methods and parameters since then. The ten scenarios found in their report were reduced to three, the Post-Drilling Resident, the Post-Excavation Resident, and an All Pathways Irrigator. In addition, estimates of population dose to people along the Columbia River are also included. The attached report describes the methods and parameters used in the calculations, and derives dose factors for each scenario. In addition, waste concentrations, ground water concentrations, and river water concentrations needed to reach the performance objectives of 100 mrem/yr and 500 person-rem/yr are computed. Internal dose factors from DOE-0071 were applied when computing internal dose. External dose rate factors came from the GENII Version 1.485 software package. Dose calculations were carried out on a spreadsheet. The calculations are described in detail in the report for 63 nuclides, including 5 not presently in the GENII libraries. The spreadsheet calculations were checked by comparison with GENII, as described in Appendix D.

  7. ITER-EDA physics design requirements and plasma performance assessments

    Energy Technology Data Exchange (ETDEWEB)

    Uckan, N.A.; Galambos, J. [Oak Ridge National Lab., TN (United States); Wesley, J.; Boucher, D.; Perkins, F.; Post, D.; Putvinski, S. [ITER San Diego Joint Work Site, CA (United States)

    1996-07-01

    Physics design guidelines, plasma performance estimates, and sensitivity of performance to changes in physics assumptions are presented for the ITER-EDA Interim Design. The overall ITER device parameters have been derived from the performance goals using physics guidelines based on the physics R&D results. The ITER-EDA design has a single-null divertor configuration (divertor at the bottom) with a nominal plasma current of 21 MA, magnetic field of 5.68 T, major and minor radius of 8.14 m and 2.8 m, and a plasma elongation (at the 95% flux surface) of {approximately}1.6 that produces a nominal fusion power of {approximately}1.5 GW for an ignited burn pulse length of {ge}1000 s. The assessments have shown that ignition at 1.5 GW of fusion power can be sustained in ITER for 1000 s given present extrapolations of H-mode confinement ({tau}{sub E} = 0.85 {times} {tau}{sub ITER93H}), helium exhaust ({tau}*{sub He}/{tau}{sub E} = 10), representative plasma impurities (n{sub Be}/n{sub e} = 2%), and beta limit [{beta}{sub N} = {beta}(%)/(I/aB) {le} 2.5]. The provision of 100 MW of auxiliary power, necessary to access to H-mode during the approach to ignition, provides for the possibility of driven burn operations at Q = 15. This enables ITER to fulfill its mission of fusion power ({approximately} 1--1.5 GW) and fluence ({approximately}1 MWa/m{sup 2}) goals if confinement, impurity levels, or operational (density, beta) limits prove to be less favorable than present projections. The power threshold for H-L transition, confinement uncertainties, and operational limits (Greenwald density limit and beta limit) are potential performance limiting issues. Improvement of the helium exhaust ({tau}*{sub He}/{tau}{sub E} {le} 5) and potential operation in reverse-shear mode significantly improve ITER performance.

  8. Assessing the Health and Performance Risks of Carbon Dioxide Exposures

    Science.gov (United States)

    James, John T.; Meyers, V. E.; Alexander, D.

    2010-01-01

    Carbon dioxide (CO2) is an anthropogenic gas that accumulates in spacecraft to much higher levels than earth-normal levels. Controlling concentrations of this gas to acceptable levels to ensure crew health and optimal performance demands major commitment of resources. NASA has many decades of experience monitoring and controlling CO2, yet we are uncertain of the levels at which subtle performance decrements develop. There is limited evidence from ground-based studies that visual disturbances can occur during brief exposures and visual changes have been noted in spaceflight crews. These changes may be due to CO2 alone or in combination with other known spaceflight factors such as increased intracranial pressure due to fluid shifts. Discerning the comparative contribution of each to performance decrements is an urgent issue if we hope to optimize astronaut performance aboard the ISS. Long-term, we must know the appropriate control levels for exploration-class missions to ensure that crewmembers can remain cooperative and productive in a highly stressful environment. Furthermore, we must know the magnitude of interindividual variability in susceptibility to the adverse effects of CO2 so that the most tolerant crewmembers can be identified. Ground-based studies have been conducted for many years to set exposure limits for submariners; however, these studies are typically limited and incompletely reported. Nonetheless, NASA, in cooperation with the National Research Council, has set exposure limits for astronauts using this limited database. These studies do not consider the interactions of spaceflight-induced fluid shifts and CO2 exposures. In an attempt to discern whether CO2 levels affect the incidence of headache and visual disturbances in astronauts we performed a retrospective study comparing average CO2 levels and the prevalence of headache and visual disturbances. Our goal is to narrow gaps in the risk profile for in-flight CO2 exposures. Such studies can

  9. A probabilistic technique for the assessment of complex dynamic system resilience

    Science.gov (United States)

    Balchanos, Michael Gregory

    In the presence of operational uncertainty, one of the greatest challenges in systems engineering is to ensure system effectiveness, mission capability and survivability for large scale, complex system architectures. Historic events such as the 2003 Northeastern Blackout, and the 2005 Hurricane Katrina, have underlined the great importance of system safety, and survivability. With safety management currently applied on a reactive basis to emerging incidents and risk challenges, there is a paradigm shift from passive, reactive and diagnosis-based approaches to the development of architectures that will autonomously manage safety and survivability through active, proactive and prognosis-based engineering solutions. The shift aims to bring safety considerations early in the engineering design process, in order to reduce retrofitting and additional safety certification costs, increase flexibility in risk management, and essentially make safety be "built-in" the design. As a possible enabling research direction, resilience engineering is an emerging discipline, pertinent to safety management, which offers alternative insights on the design of more safe and survivable system architectures. Conceptually, resilience engineering brings new perspectives on the understanding of system safety, accidents, failures, performance degradations and risk. A resilient system can "absorb" the impact of change due to unexpected disturbances, while it "adapts" to change, in order to maintain the system's physical integrity and capability to carry on with its mission. The leading hypothesis advocates that if a complex dynamic system is more resilient, then it would be more survivable, thus more effective, despite the unexpected disturbances that could affect its normal operating conditions. For investigating the impact of more resilient systems on survivability and safety, a framework for theoretical resilience estimations has been formulated. It constitutes the basis for quantitative

  10. Assessing performance of orthology detection strategies applied to eukaryotic genomes.

    Directory of Open Access Journals (Sweden)

    Feng Chen

    Full Text Available Orthology detection is critically important for accurate functional annotation, and has been widely used to facilitate studies on comparative and evolutionary genomics. Although various methods are now available, there has been no comprehensive analysis of performance, due to the lack of a genomic-scale 'gold standard' orthology dataset. Even in the absence of such datasets, the comparison of results from alternative methodologies contains useful information, as agreement enhances confidence and disagreement indicates possible errors. Latent Class Analysis (LCA is a statistical technique that can exploit this information to reasonably infer sensitivities and specificities, and is applied here to evaluate the performance of various orthology detection methods on a eukaryotic dataset. Overall, we observe a trade-off between sensitivity and specificity in orthology detection, with BLAST-based methods characterized by high sensitivity, and tree-based methods by high specificity. Two algorithms exhibit the best overall balance, with both sensitivity and specificity>80%: INPARANOID identifies orthologs across two species while OrthoMCL clusters orthologs from multiple species. Among methods that permit clustering of ortholog groups spanning multiple genomes, the (automated OrthoMCL algorithm exhibits better within-group consistency with respect to protein function and domain architecture than the (manually curated KOG database, and the homolog clustering algorithm TribeMCL as well. By way of using LCA, we are also able to comprehensively assess similarities and statistical dependence between various strategies, and evaluate the effects of parameter settings on performance. In summary, we present a comprehensive evaluation of orthology detection on a divergent set of eukaryotic genomes, thus providing insights and guides for method selection, tuning and development for different applications. Many biological questions have been addressed by multiple

  11. The disruptive effects of pain on complex cognitive performance and executive control.

    Directory of Open Access Journals (Sweden)

    Edmund Keogh

    Full Text Available Pain interferes and disrupts attention. What is less clear is how pain affects performance on complex tasks, and the strategies used to ensure optimal outcomes. The aim of the current study was to examine the effect of pain on higher-order executive control processes involved in managing complex tasks. Sixty-two adult volunteers (40 female completed two computer-based tasks: a breakfast making task and a word generation puzzle. Both were complex, involving executive control functions, including goal-directed planning and switching. Half of those recruited performed the tasks under conditions of thermal heat pain, and half with no accompanying pain. Whilst pain did not affect central performance on either task, it did have indirect effects. For the breakfast task, pain resulted in a decreased ability to multitask, with performance decrements found on the secondary task. However, no effects of pain were found on the processes thought to underpin this task. For the word generation puzzle, pain did not affect task performance, but did alter subjective accounts of the processes used to complete the task; pain affected the perceived allocation of time to the task, as well as switching perceptions. Sex differences were also found. When studying higher-order cognitive processes, pain-related interference effects are varied, and may result in subtle or indirect changes in cognition.

  12. Performance Analysis of Heterogeneous Data Centers in Cloud Computing Using a Complex Queuing Model

    Directory of Open Access Journals (Sweden)

    Wei-Hua Bai

    2015-01-01

    Full Text Available Performance evaluation of modern cloud data centers has attracted considerable research attention among both cloud providers and cloud customers. In this paper, we investigate the heterogeneity of modern data centers and the service process used in these heterogeneous data centers. Using queuing theory, we construct a complex queuing model composed of two concatenated queuing systems and present this as an analytical model for evaluating the performance of heterogeneous data centers. Based on this complex queuing model, we analyze the mean response time, the mean waiting time, and other important performance indicators. We also conduct simulation experiments to confirm the validity of the complex queuing model. We further conduct numerical experiments to demonstrate that the traffic intensity (or utilization of each execution server, as well as the configuration of server clusters, in a heterogeneous data center will impact the performance of the system. Our results indicate that our analytical model is effective in accurately estimating the performance of the heterogeneous data center.

  13. Low-Complexity LDPC Codes with Near-Optimum Performance over the BEC

    CERN Document Server

    Paolini, Enrico; Varrella, Michela; Matuz, Balazs; Chiani, Marco

    2008-01-01

    Recent works showed how low-density parity-check (LDPC) erasure correcting codes, under maximum likelihood (ML) decoding, are capable of tightly approaching the performance of an ideal maximum-distance-separable code on the binary erasure channel. Such result is achievable down to low error rates, even for small and moderate block sizes, while keeping the decoding complexity low, thanks to a class of decoding algorithms which exploits the sparseness of the parity-check matrix to reduce the complexity of Gaussian elimination (GE). In this paper the main concepts underlying ML decoding of LDPC codes are recalled. A performance analysis among various LDPC code classes is then carried out, including a comparison with fixed-rate Raptor codes. The results show that LDPC and Raptor codes provide almost identical performance in terms of decoding failure probability vs. overhead.

  14. A Study of Complex Deep Learning Networks on High Performance, Neuromorphic, and Quantum Computers

    Energy Technology Data Exchange (ETDEWEB)

    Potok, Thomas E [ORNL; Schuman, Catherine D [ORNL; Young, Steven R [ORNL; Patton, Robert M [ORNL; Spedalieri, Federico [University of Southern California, Information Sciences Institute; Liu, Jeremy [University of Southern California, Information Sciences Institute; Yao, Ke-Thia [University of Southern California, Information Sciences Institute; Rose, Garrett [University of Tennessee (UT); Chakma, Gangotree [University of Tennessee (UT)

    2016-01-01

    Current Deep Learning models use highly optimized convolutional neural networks (CNN) trained on large graphical processing units (GPU)-based computers with a fairly simple layered network topology, i.e., highly connected layers, without intra-layer connections. Complex topologies have been proposed, but are intractable to train on current systems. Building the topologies of the deep learning network requires hand tuning, and implementing the network in hardware is expensive in both cost and power. In this paper, we evaluate deep learning models using three different computing architectures to address these problems: quantum computing to train complex topologies, high performance computing (HPC) to automatically determine network topology, and neuromorphic computing for a low-power hardware implementation. Due to input size limitations of current quantum computers we use the MNIST dataset for our evaluation. The results show the possibility of using the three architectures in tandem to explore complex deep learning networks that are untrainable using a von Neumann architecture. We show that a quantum computer can find high quality values of intra-layer connections and weights, while yielding a tractable time result as the complexity of the network increases; a high performance computer can find optimal layer-based topologies; and a neuromorphic computer can represent the complex topology and weights derived from the other architectures in low power memristive hardware. This represents a new capability that is not feasible with current von Neumann architecture. It potentially enables the ability to solve very complicated problems unsolvable with current computing technologies.

  15. Complex myograph allows the examination of complex muscle contractions for the assessment of muscle force, shortening, velocity, and work in vivo

    Directory of Open Access Journals (Sweden)

    Ruhschulte Hainer

    2008-07-01

    Full Text Available Abstract Background The devices used for in vivo examination of muscle contractions assess only pure force contractions and the so-called isokinetic contractions. In isokinetic experiments, the extremity and its muscle are artificially moved with constant velocity by the measuring device, while a tetanic contraction is induced in the muscle, either by electrical stimulation or by maximal voluntary activation. With these systems, experiments cannot be performed at pre-defined, constant muscle length, single contractions cannot be evaluated individually and the separate examination of the isometric and the isotonic components of single contractions is not possible. Methods The myograph presented in our study has two newly developed technical units, i.e. a. a counterforce unit which can load the muscle with an adjustable, but constant force and b. a length-adjusting unit which allows for both the stretching and the contraction length to be infinitely adjustable independently of one another. The two units support the examination of complex types of contraction and store the counterforce and length-adjusting settings, so that these conditions may be accurately reapplied in later sessions. Results The measurement examples presented show that the muscle can be brought to every possible pre-stretching length and that single isotonic or complex isometric-isotonic contractions may be performed at every length. The applied forces act during different phases of contraction, resulting into different pre- and after-loads that can be kept constant – uninfluenced by the contraction. Maximal values for force, shortening, velocity and work may be obtained for individual muscles. This offers the possibility to obtain information on the muscle status and to monitor its changes under non-invasive measurement conditions. Conclusion With the Complex Myograph, the whole spectrum of a muscle's mechanical characteristics may be assessed.

  16. Enhanced Performance Assessment System (EPAS) for carbon sequestration.

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Yifeng; Sun, Amy Cha-Tien; McNeish, Jerry A. (Sandia National Laboratories, Livermore, CA); Dewers, Thomas A.; Hadgu, Teklu; Jove-Colon, Carlos F.

    2010-09-01

    Carbon capture and sequestration (CCS) is an option to mitigate impacts of atmospheric carbon emission. Numerous factors are important in determining the overall effectiveness of long-term geologic storage of carbon, including leakage rates, volume of storage available, and system costs. Recent efforts have been made to apply an existing probabilistic performance assessment (PA) methodology developed for deep nuclear waste geologic repositories to evaluate the effectiveness of subsurface carbon storage (Viswanathan et al., 2008; Stauffer et al., 2009). However, to address the most pressing management, regulatory, and scientific concerns with subsurface carbon storage (CS), the existing PA methodology and tools must be enhanced and upgraded. For example, in the evaluation of a nuclear waste repository, a PA model is essentially a forward model that samples input parameters and runs multiple realizations to estimate future consequences and determine important parameters driving the system performance. In the CS evaluation, however, a PA model must be able to run both forward and inverse calculations to support optimization of CO{sub 2} injection and real-time site monitoring as an integral part of the system design and operation. The monitoring data must be continually fused into the PA model through model inversion and parameter estimation. Model calculations will in turn guide the design of optimal monitoring and carbon-injection strategies (e.g., in terms of monitoring techniques, locations, and time intervals). Under the support of Laboratory-Directed Research & Development (LDRD), a late-start LDRD project was initiated in June of Fiscal Year 2010 to explore the concept of an enhanced performance assessment system (EPAS) for carbon sequestration and storage. In spite of the tight time constraints, significant progress has been made on the project: (1) Following the general PA methodology, a preliminary Feature, Event, and Process (FEP) analysis was performed for

  17. Performance, qualitative and microbiogy characteristics of laying hens fed with different levels of enzyme complex

    Directory of Open Access Journals (Sweden)

    Alexandre Oba

    2014-02-01

    Full Text Available This study aimed to evaluate the performance of laying hens fed different levels of the enzyme complex (phytase, cellulase, pectinase, protease, amylase, beta-glucanase e xylanase. 328 laying hens were used Shaver White strain at 60 weeks of age. The birds were distributed into five treatments, involving different levels of enzyme complex (0, 50, 100, 150 and 200 ppm. We evaluated the performance of laying hens, egg shell quality, internal egg quality, pH and viscosity of the intestinal contents, dry matter and mineral in the excreta and microbiology of the contents in the small intestine. The results showed that the addition of the enzyme complex in diets based on corn and soybean meal for laying hens old did not improve on broiler performance, eggshell and internal egg quality, dry matter and mineral content in the excreta and microbiology of the contents in the small intestine. However there was a significant linear response when increased levels of the enzyme complex, where it caused an increase in pH and a lower viscosity of digesta within the small intestine.

  18. Assessment of the Performance of Semblance Weighted Diffraction Stack

    Science.gov (United States)

    Marti, D.; Palomeras, I.; Andara, E.; Carbonell, R.; Zeyen, H.

    2009-04-01

    A variety of seismic reflection data sets has been use to estimate the assessment of a recently developed true amplitude limited-aperture migration based on a modification of the weighting function in the Kirchoff migration operator. Prestack Kirchoff depth migration has become a conventional processing step in seismic reflection imaging. It provides new insights of the reflecting boundaries in crustal studies and it's also an important method for reliable velocity models building. In this migration scheme the weight function on the amplitude part of the diffraction stack algorithm is derived from the semblance of the slant stack of the data. Thus this weight function is exclusively a function of the energy and the direction from which this reflected energy reaches the receiver. The semblance of the slant stack for a particular offset (the receiver offset) represents the total amount of energy that reaches a particular receiver with specific ray parameter (i.e. direction of propagation of the seismic energy). The weight function reduces the diffraction stack to a weighted stack of the amplitudes at a given travel time to every point along a corresponding isochron. This migration scheme is applied to synthetic and real normal incidence seismic reflection data providing a depth images with a better resolution of the sub-vertical structures. For example it provided a depth image of the north dipping Central Unit of the complex suture zone between the Ossa Morena Zone and the Central Iberian Zone of the IBERSEIS Vibroseis seismic profile. Furthermore, this scheme is also successful when migrating wide-angle deep seismic reflection data. In this case a low fold image of the lower crust, Moho and upper mantle across SW-Iberia was obtained by using 6 wide-angle shot gathers. Finally, depth imaging by using VSP's is also a possibility using this migration scheme.

  19. Post-closure biosphere assessment modelling: comparison of complex and more stylised approaches.

    Science.gov (United States)

    Walke, Russell C; Kirchner, Gerald; Xu, Shulan; Dverstorp, Björn

    2015-10-01

    Geological disposal facilities are the preferred option for high-level radioactive waste, due to their potential to provide isolation from the surface environment (biosphere) on very long timescales. Assessments need to strike a balance between stylised models and more complex approaches that draw more extensively on site-specific information. This paper explores the relative merits of complex versus more stylised biosphere models in the context of a site-specific assessment. The more complex biosphere modelling approach was developed by the Swedish Nuclear Fuel and Waste Management Co (SKB) for the Formark candidate site for a spent nuclear fuel repository in Sweden. SKB's approach is built on a landscape development model, whereby radionuclide releases to distinct hydrological basins/sub-catchments (termed 'objects') are represented as they evolve through land rise and climate change. Each of seventeen of these objects is represented with more than 80 site specific parameters, with about 22 that are time-dependent and result in over 5000 input values per object. The more stylised biosphere models developed for this study represent releases to individual ecosystems without environmental change and include the most plausible transport processes. In the context of regulatory review of the landscape modelling approach adopted in the SR-Site assessment in Sweden, the more stylised representation has helped to build understanding in the more complex modelling approaches by providing bounding results, checking the reasonableness of the more complex modelling, highlighting uncertainties introduced through conceptual assumptions and helping to quantify the conservatisms involved. The more stylised biosphere models are also shown capable of reproducing the results of more complex approaches. A major recommendation is that biosphere assessments need to justify the degree of complexity in modelling approaches as well as simplifying and conservative assumptions. In light of

  20. Assessment of a new biological complex efficacy on dysseborrhea, inflammation, and Propionibacterium acnes proliferation

    Directory of Open Access Journals (Sweden)

    Trompezinski S

    2016-08-01

    Full Text Available Sandra Trompezinski,1 Sophie Weber,1 Benoît Cadars,2 Florence Larue,1 Nathalie Ardiet,1 Marlène Chavagnac-Bonneville,2 Michèle Sayag,2 Eric Jourdan2 1NAOS, Aix-en Provence, 2Direction Scientifique Bioderma (NAOS, Lyon, France Introduction: Acne vulgaris is a common chronic inflammatory disease of the pilosebaceous unit triggered by Propionibacterium acnes. A bakuchiol, Ginkgo biloba extract, and mannitol (BGM complex has been developed to provide patients with acne with a specific dermocosmetic to be used adjunctively with conventional treatments. Objective: The aim of these studies was to assess the antibacterial, anti-inflammatory, and antioxidative potential of BGM complex and its individual compounds as well as its impact on sebum composition. Methods: The antibacterial, anti-inflammatory, and antioxidative potential of BGM complex and its compounds was assessed through in vitro, ex vivo, and clinical studies. The clinical benefit of BGM complex formulated in a cream was assessed in subjects prone to acne through sebum composition analysis and photometric assessments. Results: Results from the studies showed that the BGM complex has significant antibacterial, anti-inflammatory, and antioxidative properties. At similar concentrations, bakuchiol has up to twice the antioxidative potential than vitamin E. In subjects, BGM complex regulated the sebum composition in acne patients by increasing the level of sapienic and linolenic acid and reducing the level of oleic acid. The reduced number of porphyrins on the skin surface showed that it is also effective against P. acnes. Conclusion: BGM complex provides a complete adjunctive care in patients with acne by targeting etiopathogenic factors of acne: dysseborrhea, inflammation, and P. acnes proliferation. Keywords: acne, antibacterial, anti-inflammatory, antioxidation, cosmetics, sebum

  1. High performance parallel computing of flows in complex geometries: II. Applications

    Energy Technology Data Exchange (ETDEWEB)

    Gourdain, N; Gicquel, L; Staffelbach, G; Vermorel, O; Duchaine, F; Boussuge, J-F [Computational Fluid Dynamics Team, CERFACS, Toulouse, 31057 (France); Poinsot, T [Institut de Mecanique des Fluides de Toulouse, Toulouse, 31400 (France)], E-mail: Nicolas.gourdain@cerfacs.fr

    2009-01-01

    Present regulations in terms of pollutant emissions, noise and economical constraints, require new approaches and designs in the fields of energy supply and transportation. It is now well established that the next breakthrough will come from a better understanding of unsteady flow effects and by considering the entire system and not only isolated components. However, these aspects are still not well taken into account by the numerical approaches or understood whatever the design stage considered. The main challenge is essentially due to the computational requirements inferred by such complex systems if it is to be simulated by use of supercomputers. This paper shows how new challenges can be addressed by using parallel computing platforms for distinct elements of a more complex systems as encountered in aeronautical applications. Based on numerical simulations performed with modern aerodynamic and reactive flow solvers, this work underlines the interest of high-performance computing for solving flow in complex industrial configurations such as aircrafts, combustion chambers and turbomachines. Performance indicators related to parallel computing efficiency are presented, showing that establishing fair criterions is a difficult task for complex industrial applications. Examples of numerical simulations performed in industrial systems are also described with a particular interest for the computational time and the potential design improvements obtained with high-fidelity and multi-physics computing methods. These simulations use either unsteady Reynolds-averaged Navier-Stokes methods or large eddy simulation and deal with turbulent unsteady flows, such as coupled flow phenomena (thermo-acoustic instabilities, buffet, etc). Some examples of the difficulties with grid generation and data analysis are also presented when dealing with these complex industrial applications.

  2. Lawrence Livermore National Laboratory Emergency Response Capability 2009 Baseline Needs Assessment Performance Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Sharry, J A

    2009-12-30

    This document was prepared by John A. Sharry, LLNL Fire Marshal and Division Leader for Fire Protection and was reviewed by Sandia/CA Fire Marshal, Martin Gresho. This document is the second of a two-part analysis of Emergency Response Capabilities of Lawrence Livermore National Laboratory. The first part, 2009 Baseline Needs Assessment Requirements Document established the minimum performance criteria necessary to meet mandatory requirements. This second part analyses the performance of Lawrence Livermore Laboratory Emergency Management Department to the contents of the Requirements Document. The document was prepared based on an extensive review of information contained in the 2004 BNA, a review of Emergency Planning Hazards Assessments, a review of building construction, occupancy, fire protection features, dispatch records, LLNL alarm system records, fire department training records, and fire department policies and procedures. On October 1, 2007, LLNL contracted with the Alameda County Fire Department to provide emergency response services. The level of service called for in that contract is the same level of service as was provided by the LLNL Fire Department prior to that date. This Compliance Assessment will evaluate fire department services beginning October 1, 2008 as provided by the Alameda County Fire Department.

  3. Assessment of calcium scoring performance in cardiac computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Ulzheimer, Stefan; Kalender, Willi A. [Institute of Medical Physics, University of Erlangen-Nuernberg, Krankenhausstrasse 12, 91054, Erlangen (Germany)

    2003-03-01

    Electron beam tomography (EBT) has been used for cardiac diagnosis and the quantitative assessment of coronary calcium since the late 1980s. The introduction of mechanical multi-slice spiral CT (MSCT) scanners with shorter rotation times opened new possibilities of cardiac imaging with conventional CT scanners. The purpose of this work was to qualitatively and quantitatively evaluate the performance for EBT and MSCT for the task of coronary artery calcium imaging as a function of acquisition protocol, heart rate, spiral reconstruction algorithm (where applicable) and calcium scoring method. A cardiac CT semi-anthropomorphic phantom was designed and manufactured for the investigation of all relevant image quality parameters in cardiac CT. This phantom includes various test objects, some of which can be moved within the anthropomorphic phantom in a manner that mimics realistic heart motion. These tools were used to qualitatively and quantitatively demonstrate the accuracy of coronary calcium imaging using typical protocols for an electron beam (Evolution C-150XP, Imatron, South San Francisco, Calif.) and a 0.5-s four-slice spiral CT scanner (Sensation 4, Siemens, Erlangen, Germany). A special focus was put on the method of quantifying coronary calcium, and three scoring systems were evaluated (Agatston, volume, and mass scoring). Good reproducibility in coronary calcium scoring is always the result of a combination of high temporal and spatial resolution; consequently, thin-slice protocols in combination with retrospective gating on MSCT scanners yielded the best results. The Agatston score was found to be the least reproducible scoring method. The hydroxyapatite mass, being better reproducible and comparable on different scanners and being a physical quantitative measure, appears to be the method of choice for future clinical studies. The hydroxyapatite mass is highly correlated to the Agatston score. The introduced phantoms can be used to quantitatively assess the

  4. Key performance indicators for the assessment of pediatric pharmacotherapeutic guidance.

    Science.gov (United States)

    Barrett, Jeffrey S; Patel, Dimple; Jayaraman, Bhuvana; Narayan, Mahesh; Zuppa, Athena

    2008-07-01

    Given the paucity of actual guidance provided for managing pediatric drug therapy, prescribing caregivers must be able to draw on the limited published information in pediatrics and/or guidance provided in adults with some account for expected pediatric response. Guidance for managing drug therapy in children is clearly desirable. Our objectives were to construct key performance indicators (KPIs) for pediatric pharmacotherapy guidance to identify drugs where pharmacotherapy guidance would be most beneficial. A pilot survey to assess variation in caregiver appreciation for pediatric dosing guidance has also been constructed to provide a complementary subjective assessment. Three KPI categories, drug utilization (based on hospital admission and billing data collected from 2001 through 2006), medical need, and guidance outcome value along with a KPI composite score have been proposed. Low scores are favored with respect to prioritization for pharmacotherapy guidance. The pilot survey consisted of 15 questions to assess 1) physician knowledge regarding dosing guidance, 2) attitudes toward dose modification and patient individualization, 3) the accessibility, ease of use and appropriateness of existing data stores, and 4) frequency of dosing modification, consultation of dosing compendiums and estimate of success rate in dosing guidance. Pilot results suggest that dosing guidance is generally viewed as important and that the existing resources are insufficient to guide recommendations for all drugs. While the majority of respondents check more than one resource less than 25% of the time, at least 25% of the respondents check more than one resource 25-50% of the time. The majority viewed the relevance of dosing guidance very important to the management of drug therapy. The questionnaire is being extended to the primary care centers, the Kids First Network and specialty care centers. Results will guide the development of decision support systems (DSS) that provide patient

  5. Mapping forest stand complexity for woodland caribou habitat assessment using multispectral airborne imagery

    Science.gov (United States)

    Zhang, W.; Hu, B.; Woods, M.

    2014-11-01

    The decline of the woodland caribou population is a result of their habitat loss. To conserve the habitat of the woodland caribou and protect it from extinction, it is critical to accurately characterize and monitor its habitat. Conventionally, products derived from low to medium spatial resolution remote sensing data, such as land cover classification and vegetation indices are used for wildlife habitat assessment. These products fail to provide information on the structure complexities of forest canopies which reflect important characteristics of caribou's habitats. Recent studies have employed the LiDAR system (Light Detection And Ranging) to directly retrieve the three dimensional forest attributes. Although promising results have been achieved, the acquisition cost of LiDAR data is very high. In this study, utilizing the very high spatial resolution imagery in characterizing the structural development the of forest canopies was exploited. A stand based image texture analysis was performed to predict forest succession stages. The results were demonstrated to be consistent with those derived from LiDAR data.

  6. First Assessments of ICESat-2 Performance Using Aircraft Data

    Science.gov (United States)

    Neumann, Tom; Markus, Thorsten; Brunt, Kelly M.; Hancock, David; Brenner, Anita C.

    2011-01-01

    The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) Is a next-generation laser altimeter designed to continue key observations of ice sheet elevation change, sea ice freeboard, vegetation canopy height, earth surface elevation, and sea surface height. Scheduled for launch in early 2016, ICESat-2 will use a high repetition rate (approximately 10 kHz), small footprint (10m diameter) laser, and a single-photon-sensitive detection strategy (photon counting) to measure precise ranges to the earth's surface. Operating in the green (approximately 532nm), the six beams of ICESat-2 will provide improved spatial coverage compared with ICESat while the differences in transmit energy among the beams provide a large dynamic range. In order to evaluate models of predicted ICESat-2 performance, and provide ICESat-2-like data for algorithm development an airborne ICESat-2 simulator was developed and first flown in 2010, this simulator, the Multiple Altimeter Beam Experimental Lidar (MABEL) has now had three deployments in the western US, and will be deployed to the polar regions in spring of 2012. MABEL uses a similar measurement strategy to what will be used on ICESat-2. MABEL collects more spatially-dense data than ICESat-2 (approximately 2-cm along track) with a smaller 2m diameter footprint in 16 green channels and an additional 8 channels in the infrared. The comparison between frequencies allows for analysis of possible penetration of green energy into water or snow. We present MABEL data collected over deserts, forests, ocean water, lakes. snow covered mountains, and saft flats, provide examples of how these data are being used to develop algorithms that derive geophysical products from ICESat 2 and assess expected performances.

  7. Judicial Performance Review in Arizona: A Critical Assessment

    Directory of Open Access Journals (Sweden)

    Rebecca White Berch

    2014-12-01

    Full Text Available Judicial performance evaluations are a relatively new tool for assessing judges and providing information to voters to help them determine whether to retain judges in contested or retention elections. Arizona implemented its judicial evaluation program about 20 years ago, and since that time, the state has continually strived to improve its process. The result is that today Arizona has one of the most progressive and comprehensive judicial performance evaluation programs in the United States. This article takes a critical look at the strengths and weaknesses of Arizona’s program, keeping in mind two key values that the system seeks to protect: judicial accountability and judicial independence. Las evaluaciones del rendimiento judicial son una herramienta relativamente nueva para evaluar a los jueces y ofrecer información a los votantes, que les ayude a decidir si quieren reelegir a los jueces en las elecciones. Arizona implementó su programa de evaluación judicial hace unos 20 años, y desde ese momento, el Estado se ha esforzado continuamente en mejorar el proceso. El resultado es que hoy en día, Arizona tiene uno de los programas de evaluación del rendimiento judicial más progresistas e integrales de los Estados Unidos. Este artículo ofrece una mirada crítica a las fortalezas y debilidades del programa de Arizona, teniendo en cuenta dos valores clave que el sistema trata de proteger: la responsabilidad judicial y la independencia judicial. DOWNLOAD THIS PAPER FROM SSRN: http://ssrn.com/abstract=2533868

  8. A blending of computer-based assessment and performance-based assessment: Multimedia-Based Performance Assessment (MBPA). The introduction of a new method of assessment in Dutch Vocational Education and Training (VET)

    NARCIS (Netherlands)

    de Klerk, Sebastiaan; Eggen, Theodorus Johannes Hendrikus Maria; Veldkamp, Bernard P.

    2014-01-01

    Innovation in technology drives innovation in assessment. Since the introduction of computer-based assessment (CBA), a few decades ago, many formerly paper-and-pencil tests have transformed in a computer-based equivalent. CBAs are becoming more complex, including multimedia and simulative elements

  9. A blending of computer-based assessment and performance-based assessment: Multimedia-Based Performance Assessment (MBPA). The introduction of a new method of assessment in Dutch Vocational Education and Training (VET)

    NARCIS (Netherlands)

    Klerk, de Sebastiaan; Eggen, Theo J.H.M.; Veldkamp, Bernard P.

    2014-01-01

    Innovation in technology drives innovation in assessment. Since the introduction of computer-based assessment (CBA), a few decades ago, many formerly paper-and-pencil tests have transformed in a computer-based equivalent. CBAs are becoming more complex, including multimedia and simulative elements a

  10. Complexity

    CERN Document Server

    Gershenson, Carlos

    2011-01-01

    The term complexity derives etymologically from the Latin plexus, which means interwoven. Intuitively, this implies that something complex is composed by elements that are difficult to separate. This difficulty arises from the relevant interactions that take place between components. This lack of separability is at odds with the classical scientific method - which has been used since the times of Galileo, Newton, Descartes, and Laplace - and has also influenced philosophy and engineering. In recent decades, the scientific study of complexity and complex systems has proposed a paradigm shift in science and philosophy, proposing novel methods that take into account relevant interactions.

  11. Addressing the Complexity of Writing Development: Toward an Ecological Model of Assessment

    Science.gov (United States)

    Wardle, Elizabeth; Roozen, Kevin

    2012-01-01

    This article offers one potential response to Yancey's (1999) call for a fourth wave of writing assessment able to capture writing development in all of its complexity. Based on an ecological perspective of literate development that situates students' growth as writers across multiple engagements with writing, including those outside of school,…

  12. Managing the Process of Protection Level Assessment of the Complex Organization and Technical Industrial Enterprises

    Science.gov (United States)

    Gorlov, A. P.; Averchenkov, V. I.; Rytov, M. Yu; Eryomenko, V. T.

    2017-01-01

    The article is concerned with mathematical simulation of protection level assessment of complex organizational and technical systems of industrial enterprises by creating automated system, which main functions are: information security (IS) audit, forming of the enterprise threats model, recommendations concerning creation of the information protection system, a set of organizational-administrative documentation.

  13. Classification Consistency and Accuracy for Complex Assessments Using Item Response Theory

    Science.gov (United States)

    Lee, Won-Chan

    2010-01-01

    In this article, procedures are described for estimating single-administration classification consistency and accuracy indices for complex assessments using item response theory (IRT). This IRT approach was applied to real test data comprising dichotomous and polytomous items. Several different IRT model combinations were considered. Comparisons…

  14. The Word Writing CAFE: Assessing Student Writing for Complexity, Accuracy, and Fluency

    Science.gov (United States)

    Leal, Dorothy J.

    2005-01-01

    The Word Writing CAFE is a new assessment tool designed for teachers to evaluate objectively students' word-writing ability for fluency, accuracy, and complexity. It is designed to be given to the whole class at one time. This article describes the development of the CAFE and provides directions for administering and scoring it. The author also…

  15. Examining the Relationship between Gender DIF and Language Complexity in Mathematics Assessments

    Science.gov (United States)

    Kan, Adnan; Bulut, Okan

    2014-01-01

    This study investigated whether the linguistic complexity of items leads to gender differential item functioning (DIF) on mathematics assessments. Two forms of a mathematics test were developed. The first form consisted of algebra items based on mathematical expressions, terms, and equations. In the second form, the same items were written as word…

  16. Applying the PDCA Cycle to the Complex Task of Teaching and Assessing Public Relations Writing

    Science.gov (United States)

    Knight, John E.; Allen, Sandra

    2012-01-01

    Teaching skills, knowledge and abilities appropriate for career-ready graduates and assessing learning are complex issues. Developing a valid and reliable approach is often by trial and error. Instead, the authors employed Deming's PDCA Cycle of continuous improvement as a systematic procedure to incrementally move closer to their goal. This paper…

  17. But Is It Fair? Developing Students' Understanding of Grading Complex Written Work through Peer Assessment

    Science.gov (United States)

    McConlogue, Teresa

    2012-01-01

    Peer assessment of long written tasks poses particular problems as these tasks typically involve complex learning and solving ill-structured problems which require divergent responses. Marking reliability of this kind of writing task is difficult to achieve. The author illustrates this through an evaluation of two implementations of peer…

  18. Assessment of national biomass in complex forests and technical capacity scenarios

    Science.gov (United States)

    Matieu Henry; Javier G. P. Gamarra; Gael Sola; Luca Birigazzi; Emily Donegan; Julian Murillo; Tommaso Chiti; Nicolas Picard; Miguel Cifuentes-Jara; S Sandeep; Laurent. Saint-André

    2015-01-01

    Understanding forest ecosystems is paramount for their sustainable management and for the livelihoods and ecosystem services which depend on them. However, the complexity and diversity of these systems poses a challenge to interpreting data patterns. The availability and accessibility of data and tools often determine the method selected for forest assessment. Capacity...

  19. Methodology development for the sustainability process assessment of sheet metal forming of complex-shaped products

    Science.gov (United States)

    Pankratov, D. L.; Kashapova, L. R.

    2015-06-01

    A methodology was developed for automated assessment of the reliability of the process of sheet metal forming process to reduce the defects in complex components manufacture. The article identifies the range of allowable values of the stamp parameters to obtain defect-free punching of spars trucks.

  20. The Word Writing CAFE: Assessing Student Writing for Complexity, Accuracy, and Fluency

    Science.gov (United States)

    Leal, Dorothy J.

    2005-01-01

    The Word Writing CAFE is a new assessment tool designed for teachers to evaluate objectively students' word-writing ability for fluency, accuracy, and complexity. It is designed to be given to the whole class at one time. This article describes the development of the CAFE and provides directions for administering and scoring it. The author also…

  1. Modeling logistic performance in quantitative microbial risk assessment.

    Science.gov (United States)

    Rijgersberg, Hajo; Tromp, Seth; Jacxsens, Liesbeth; Uyttendaele, Mieke

    2010-01-01

    In quantitative microbial risk assessment (QMRA), food safety in the food chain is modeled and simulated. In general, prevalences, concentrations, and numbers of microorganisms in media are investigated in the different steps from farm to fork. The underlying rates and conditions (such as storage times, temperatures, gas conditions, and their distributions) are determined. However, the logistic chain with its queues (storages, shelves) and mechanisms for ordering products is usually not taken into account. As a consequence, storage times-mutually dependent in successive steps in the chain-cannot be described adequately. This may have a great impact on the tails of risk distributions. Because food safety risks are generally very small, it is crucial to model the tails of (underlying) distributions as accurately as possible. Logistic performance can be modeled by describing the underlying planning and scheduling mechanisms in discrete-event modeling. This is common practice in operations research, specifically in supply chain management. In this article, we present the application of discrete-event modeling in the context of a QMRA for Listeria monocytogenes in fresh-cut iceberg lettuce. We show the potential value of discrete-event modeling in QMRA by calculating logistic interventions (modifications in the logistic chain) and determining their significance with respect to food safety.

  2. Assessing photoplethysmographic imaging performance beyond facial perfusion analysis

    Science.gov (United States)

    Amelard, Robert; Hughson, Richard L.; Greaves, Danielle K.; Clausi, David A.; Wong, Alexander

    2017-02-01

    Photoplethysmographic imaging (PPGI) systems are relatively new non-contact biophotonic diffuse reflectance systems able to assess arterial pulsations through transient changes in light-tissue interaction. Many PPGI studies have focused on extracting heart rate from the face or hand. Though PPGI systems can be used for widefield imaging of any anatomical area, whole-body investigations are lacking. Here, using a novel PPGI system, coded hemodynamic imaging (CHI), we explored and analyzed the pulsatility at major arterial locations across the whole body, including the neck (carotid artery), arm/wrist (brachial, radial and ulnar arteries), and leg/feet (popliteal and tibial arteries). CHI was positioned 1.5 m from the participant, and diffuse reactance from a broadband tungsten-halogen illumination was filtered using 850{1000 nm bandpass filter for deep tissue penetration. Images were acquired over a highly varying 24-participant sample (11/13 female/male, age 28.7+/-12.4 years, BMI 25.5+/-5.2 kg/m2), and a preliminary case study was performed. B-mode ultrasound images were acquired to validate observations through planar arterial characteristics.

  3. Assessing Performance and Tradeoffs of Bioforensic Signature Systems

    Energy Technology Data Exchange (ETDEWEB)

    Watkins, Daniel M.; Sego, Landon H.; Holmes, Aimee E.; Webb-Robertson, Bobbie-Jo M.; White, Amanda M.; Wunschel, David S.; Kreuzer, Helen W.; Corley, Courtney D.; Tardiff, Mark F.

    2013-11-12

    Chemical and biological forensic programs rely heavily on laboratory measurements to determine how a threat agent may have been produced. In addition to laboratory analyses, it may also be useful to identify institutions where the same threat agent has been produced by the same or a very similar process, since the producer of the agent may have learned methods at a university or similar institution. We developed a Bayesian network framework that combines the results of laboratory measurements with evidence from scientific literature to probabilistically rank institutions that have published papers on the agent of interest. As an example, we consider a network of three laboratory assays that are used to estimate the probabilities that a forensic sample of Yersinia pestis was produced using one of three culture media. We then apply techniques from multi-attribute decision science to assess and compare the performance of the various implementations of the Bayesian network in terms of three attributes: fidelity, document curation intensity, and consumption of the forensic sample. The mathematical approach we use to compare the various implementations is generalizable to the evaluation of other signature systems.

  4. Academic performance in terms of the applied assessment system

    Directory of Open Access Journals (Sweden)

    Arribas, José María

    2012-05-01

    Full Text Available This paper examines the academic performance depending on the evaluation and rating system used in the university. The sample under study consists of 30 subjects -taught by 35 professors to 2192 students from 7 different degrees at 14 universities of all Spain-. The results confirm that continuous assessment is the one that best results not only in terms of rate of return and success rate but also in terms of grades. En este trabajo se estudia el rendimiento académico en función del sistema de evaluación y calificación empleado en el ámbito universitario. La muestra objeto de estudio está formada por 30 asignaturas -impartidas por 35 profesores a 2192 alumnos de 7 titulaciones diferentes en 14 universidades de toda España-. Los resultados obtenidos confirman que la evaluación continua es la que propicia los mejores resultados no solo en cuanto a la Tasa de Rendimiento y a la Tasa de Éxito, sino también en cuanto a las calificaciones obtenidas.

  5. Regulatory basis for the Waste Isolation Pilot Plant performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    HOWARD,BRYAN A.; CRAWFORD,M.B.; GALSON,D.A.; MARIETTA,MELVIN G.

    2000-05-22

    The Waste Isolation Pilot Plant (WIPP) is the first operational repository designed for the safe disposal of transuranic (TRU) radioactive waste from the defense programs of the US Department of Energy (DOE). The US Environmental Protection Agency (EPA) is responsible for certifications and regulation of the WIPP facility for the radioactive components of the waste. The EPA has promulgated general radioactive waste disposal standards at 40 CFR Part 191. and WIPP-specific criteria to implement and interpret the generic disposal standards at 40 CFR Part 194. In October 1996. the DOE submitted its Compliance Certification Application (CCA) to the EPA to demonstrate compliance with the disposal standards at Subparts B and C of 40 CFR Part 191. This paper summarizes the development of the overall legal framework for radioactive waste disposal at the WIPP, the parallel development of the WIPP performance assessment (PA), and how the EPA disposal standards and implementing criteria formed the basis for the CCA WIPP PA. The CCA resulted in a certification in May 1998 by the EPA of the WIPP'S compliance with the EPA's disposal standard, thus enabling the WIPP to begin radioactive waste disposal.

  6. Development and Performance Assessment of White LED Dimmer

    Science.gov (United States)

    Maiti, Pradip Kr.; Roy, Biswanath

    2017-03-01

    A microcontroller based electronic dimmer is developed using pulse width modulation technique. This dimmer is controllable by infra-red remote within a distance of 4 m and can be electrically connected between LED module and its driver. The performance of a developed LED dimmer is assessed on basis of variation of the photometric parameters of commercially available warm white and cool white LED luminaire used in indoor lighting applications. Four equally spaced dimming levels are considered to measure luminous efficacy, spectral power distribution, CIE 1931 chromaticity coordinates, CIE 1976 CIELUV color difference, correlated color temperature, general color rendering index and one specific color rendering index for saturated red color sample. Variations of above parameters are found out with reference to the values measured at rated voltage without the developed dimmer. Analysis of experimentally measured data shows that the developed LED dimmer is capable to vary light output of the WLED luminaire within a range of 25-100% without appreciable variation of its photometric and color parameters. The only exception is observed for the luminous efficacy parameter where it shows about 17 and 14.7% reduction for warm white and cool white LED luminaire at 25% dimming level.

  7. Model of practical skill performance as an instrument for supervision and formative assessment

    DEFF Research Database (Denmark)

    Nielsen, Carsten; Sommer, Irene; Larsen, Karin

    2012-01-01

    as during practice, performance and formative assessment of practical skills learning. It provided a common language about practical skills and enhanced the participants’ understanding of professionalism in practical nursing skill. In conclusion, the model helped to highlight the complexity in mastering......There are still weaknesses in the practical skills of newly graduated nurses. There is also an escalating pressure on existing clinical placements due to increasing student numbers and structural changes in health services. Innovative educational practices and the use of tools that might support...... learning are sparsely researched in the field of clinical education for nursing students. This paper reports on an action research study that promoted and investigated use of The Model of Practical Skill Performance as a learning tool during nursing students’ clinical placement. Clinical supervisors...

  8. Understanding the impact of upscaling THM processes on performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Liu, H.H.; Zhou, Q.; Rutqvist, J.; Bodvarsson, G.S.

    2002-06-10

    The major objective of Benchmark Test 2 (BMT2) is to quantitatively examine the reliability of estimates of repository host rock performance, using large-scale performance assessment (PA) models that are developed by upscaling small-scale parameters and processes. These small-scale properties and processes can be investigated based on either discrete-fracture-network (DFN) models or heterogeneous-porous-medium (HPM) models. While most research teams use DFN, we employ fractal-based HPM for upscaling purposes. Comparison of results based on fundamentally different approaches is useful for evaluating and bounding the uncertainties in estimating repository host rock performance. HPM has both advantages and limitations when compared with DFN. DFM is conceptually more appealing because it explicitly describes fractures and the flow and transport processes that occur within them. However, HPM is more consistent with approaches used to derive field measurements of hydraulic properties (such as permeability). These properties are generally determined based on assumptions related to the continuum approach. HPM is also more straightforward in describing spatial-correlation structures of measured hydraulic properties. For example, potential flow features in the Borrowdale Volcanic Group (BVG) were found to show marked spatial clustering (Nirex, 1997), which is expected to result in a long range correlation in measured permeability distributions. This important behavior may not be captured with conventional DFNs, in which random distribution (or similar distributions) of individual fractures is assumed. The usefulness of HPM will be partially demonstrated in this report by a satisfactory description of the short interval testing data using Levy-stable fractals. (Recently, Jackson et al. (2000) also showed that equivalent HPMs could approximately describe flow processes within subgrid fracture networks.) We use Monte Carlo simulations to determine flow and transport parameters

  9. Performance of upper gastrointestinal bleeding risk assessment scores in variceal bleeding

    DEFF Research Database (Denmark)

    Ngu, Jing H.; Laursen, Stig Borbjerg; Chin, YK

    2017-01-01

    Performance of upper gastrointestinal bleeding risk assessment scores in variceal bleeding: a prospective international multicenter study.......Performance of upper gastrointestinal bleeding risk assessment scores in variceal bleeding: a prospective international multicenter study....

  10. Performance assessment methodology as applied to the Greater Confinement Disposal site: Preliminary results of the third performance iteration

    Energy Technology Data Exchange (ETDEWEB)

    Brown, T.J. [Sandia National Labs., Albuquerque, NM (United States); Baer, T.A. [GRAM Inc., Albuquerque, NM (United States)

    1994-12-31

    The US Department of Energy has contracted Sandia National Laboratories to conduct a performance assessment of the Greater Confinement Disposal facility, Nevada. The performance assessment is an iterative process in which transport models are used to prioritize site characterization data collection. Then the data are used to refine the conceptual and performance assessment models. The results of the first two performance assessment iterations indicate that the site is likely to comply with the performance standards under the existing hydrologic conditions. The third performance iteration expands the conceptual model of the existing transport system to include possible future events and incorporates these processes in the performance assessment models. The processes included in the third performance assessment are climate change, bioturbation, plant uptake, erosion, upward advection, human intrusion and subsidence. The work completed to date incorporates the effects of bioturbation, erosion and subsidence in the performance assessment model. Preliminary analyses indicate that the development of relatively deep-rooting plant species at the site, which could occur due to climate change, irrigated farming or subsidence, poses the greatest threat to the site`s performance.

  11. Functional Performance and Associations between Performance Tests and Neurological Assessment Differ in Men and Women with Parkinson’s Disease

    Directory of Open Access Journals (Sweden)

    Kadri Medijainen

    2015-01-01

    Full Text Available Background. Neurological assessment of a patient with Parkinson’s disease (PD is expected to reflect upon functional performance. As women are known to report more limitations even for same observed functional performance level, present study was designed to examine whether associations between neurological assessments and functional performance differ across genders. Methods. 14 men and 14 women with PD participated. Functional performance was assessed by measuring walking speeds on 10-meter walk test (10MWT and by performing timed-up-and-go-test (TUG. Neurological assessment included Hoehn and Yahr Scale (HY, Movement Disorders Society Unified Parkinson’s Disease Rating Scale (MDS-UPDRS, Schwab and England Activities of Daily Living Scale (S-E, and Mini Mental State Examination (MMSE. Results. In women with PD, Kendall’s tau-b correlation analyses revealed significant correlations between functional performance tests and neurological assessment measures, with the exception in MMSE. No corresponding associations were found for men, although they demonstrated better functional performance, as expected. Conclusion. Men in similar clinical stage of the PD perform better on functional tests than women. Disease severity reflects upon functional performance differently in men and women with PD. Results indicate that when interpreting the assessment results of both functional performance and neurological assessment tests, the gender of the patient should be taken into consideration.

  12. Assessment of Residents Readiness to Perform Lumbar Puncture

    DEFF Research Database (Denmark)

    Henriksen, Mikael Johannes Vuokko; Wienecke, Troels; Thagesen, Helle

    2017-01-01

    BACKGROUND: Lumbar puncture is a common procedure in many specialties. The procedure serves to diagnose life-threatening conditions, often requiring rapid performance. However, junior doctors possess uncertainties regarding performing the procedure and frequently perform below expectations. Hence...

  13. The Use of Portfolio to Assess Student's Performance

    Science.gov (United States)

    Birgin, Osman; Baki, Adnan

    2007-01-01

    Recent educational developments such as constructivism and multiple intelligence theories as well as society requested new trends engendered to radical change in traditional approaches of instruction and assessment. For this reason, alternative assessment approaches are needed in assessing both learning process and learning product. Nowadays, one…

  14. Assessment of complex dissociative disorder patients and simulated dissociation in forensic contexts.

    Science.gov (United States)

    Brand, Bethany L; Webermann, Aliya R; Frankel, A Steven

    Few assessors receive training in assessing dissociation and complex dissociative disorders (DDs). Potential differential diagnoses include anxiety, mood, psychotic, substance use, and personality disorders, as well as exaggeration and malingering. Individuals with DDs typically elevate on many clinical and validity scales on psychological tests, yet research indicates that they can be distinguished from DD simulators. Becoming informed about the testing profiles of DD individuals and DD simulators can improve the accuracy of differential diagnoses in forensic settings. In this paper, we first review the testing profiles of individuals with complex DDs and contrast them with DD simulators on assessment measures used in forensic contexts, including the Minnesota Multiphasic Personality Inventory-2 (MMPI-2), Personality Assessment Inventory (PAI), and the Structured Inventory of Reported Symptoms (SIRS), as well as dissociation-specific measures such as the Dissociative Experiences Scale (DES) and Structured Clinical Interview for DSM-IV Dissociative Disorders (SCID-D-R). We then provide recommendations for assessing complex trauma and dissociation through the aforementioned assessments. Copyright © 2016 Elsevier Ltd. All rights reserved.

  15. RFID Equivalent Model for Prediction of Functional and EMC Performances in Complex Aeronautic Environments

    Science.gov (United States)

    Piche, Alexandre; Perraud, Richard; Peres, Gilles; Nguyen, Francois; Herlem, Yannick

    2016-05-01

    Wireless networks are widely used in urban or office environments and are increasingly considered as an attractive solution for various aeronautic applications. Current investigations focus in particular on RFID technologies because of their widespread use, low cost and ease of installation. The objective of this publication is to propose a concept of RFID equivalent model to predict functional and EMC performances in complex aeronautic areas.

  16. Environmental Restoration and Waste Management manpower needs assessment: US Department of Energy complex

    Energy Technology Data Exchange (ETDEWEB)

    Holmes, C.W.; Lewis, R.E.; Hunt, S.T. (Pacific Northwest Lab., Richland, WA (United States)); Finn, M.G. (Oak Ridge Associated Universities, Inc., TN (United States))

    1992-06-01

    A study was conducted Pacific Northwest Laboratory and Oak Ridge Associated Universities, Inc. to assess the supply and demand for 53 scientific, engineering, and technical occupations relevant to the US Department of Energy's (DOE's) Office of Environmental Restoration and Waste management (EM). These assessments were made by examining budget projections and the input of program/project and human resources managers throughout the DOE complex. Quantitative projections of full-time equivalent employees slots for each occupation have been developed for the 1993--1997 time frame. Qualitative assessments of the factors that affect recruitment, staffing, and retention are also reported. The implications of the study are discussed within the likely skills mix of the future workforce and the education and organization interventions most likely to address the needs of the DOE complex.

  17. Environmental Restoration and Waste Management manpower needs assessment: US Department of Energy complex

    Energy Technology Data Exchange (ETDEWEB)

    Holmes, C.W.; Lewis, R.E.; Hunt, S.T. [Pacific Northwest Lab., Richland, WA (United States); Finn, M.G. [Oak Ridge Associated Universities, Inc., TN (United States)

    1992-06-01

    A study was conducted Pacific Northwest Laboratory and Oak Ridge Associated Universities, Inc. to assess the supply and demand for 53 scientific, engineering, and technical occupations relevant to the US Department of Energy`s (DOE`s) Office of Environmental Restoration and Waste management (EM). These assessments were made by examining budget projections and the input of program/project and human resources managers throughout the DOE complex. Quantitative projections of full-time equivalent employees slots for each occupation have been developed for the 1993--1997 time frame. Qualitative assessments of the factors that affect recruitment, staffing, and retention are also reported. The implications of the study are discussed within the likely skills mix of the future workforce and the education and organization interventions most likely to address the needs of the DOE complex.

  18. Statistical challenges in assessing potential efficacy of complex interventions in pilot or feasibility studies.

    Science.gov (United States)

    Wilson, Duncan T; Walwyn, Rebecca Ea; Brown, Julia; Farrin, Amanda J; Brown, Sarah R

    2016-06-01

    Early phase trials of complex interventions currently focus on assessing the feasibility of a large randomised control trial and on conducting pilot work. Assessing the efficacy of the proposed intervention is generally discouraged, due to concerns of underpowered hypothesis testing. In contrast, early assessment of efficacy is common for drug therapies, where phase II trials are often used as a screening mechanism to identify promising treatments. In this paper, we outline the challenges encountered in extending ideas developed in the phase II drug trial literature to the complex intervention setting. The prevalence of multiple endpoints and clustering of outcome data are identified as important considerations, having implications for timely and robust determination of optimal trial design parameters. The potential for Bayesian methods to help to identify robust trial designs and optimal decision rules is also explored. © The Author(s) 2015.

  19. Assessment of Student Performance. Volume I: Findings and Conclusions. Studies of Education Reform.

    Science.gov (United States)

    Khattri, Nidhi; And Others

    New to the current assessment-reform movement is an emphasis on the use of performance assessments to support systematic state-, district-, or school-wide objectives. This document presents findings of a study that sought to document and analyze the key characteristics of performance assessments, the facilitators and barriers in assessment reform,…

  20. On improving the performance of nonphotochemical quenching in CP29 light-harvesting antenna complex

    Energy Technology Data Exchange (ETDEWEB)

    Berman, Gennady P. [Theoretical Division, T-4, Los Alamos National Laboratory, and the New Mexico Consortium, Los Alamos, NM 87544 (United States); Nesterov, Alexander I., E-mail: nesterov@cencar.udg.mx [Departamento de Física, CUCEI, Universidad de Guadalajara, Av. Revolución 1500, Guadalajara, CP 44420, Jalisco (Mexico); Sayre, Richard T. [Biological Division, B-11, Los Alamos National Laboratory, and the New Mexico Consortium, Los Alamos, NM 87544 (United States); Still, Susanne [Department of Information and Computer Sciences, and Department of Physics and Astronomy, University of Hawaii at Mānoa, 1860 East–West Road, Honolulu, HI 96822 (United States)

    2016-03-22

    We model and simulate the performance of charge-transfer in nonphotochemical quenching (NPQ) in the CP29 light-harvesting antenna-complex associated with photosystem II (PSII). The model consists of five discrete excitonic energy states and two sinks, responsible for the potentially damaging processes and charge-transfer channels, respectively. We demonstrate that by varying (i) the parameters of the chlorophyll-based dimer, (ii) the resonant properties of the protein-solvent environment interaction, and (iii) the energy transfer rates to the sinks, one can significantly improve the performance of the NPQ. Our analysis suggests strategies for improving the performance of the NPQ in response to environmental changes, and may stimulate experimental verification. - Highlights: • Improvement of the efficiency of the charge-transfer nonphotochemical quenching in CP29. • Strategy for restoring the NPQ efficiency when the environment changes. • By changing of energy transfer rates to the sinks, one can significantly improve the performance of the NPQ.

  1. 42 CFR 460.132 - Quality assessment and performance improvement plan.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Quality assessment and performance improvement plan...-INCLUSIVE CARE FOR THE ELDERLY (PACE) Quality Assessment and Performance Improvement § 460.132 Quality assessment and performance improvement plan. (a) Basic rule. A PACE organization must have a written quality...

  2. A new active method to correct for the effects of complex apertures on coronagraph performance

    Science.gov (United States)

    Mazoyer, Johan; Pueyo, Laurent; N'Diaye, Mamadou; Fogarty, Kevin; Perrin, Marshall D.; Soummer, Remi; Norman, Colin Arthur

    2017-01-01

    The increasing complexity of the aperture geometry of the future space (WFIRST, LUVOIR) and ground based-telescope (E-ELT, TMT) will limit the performance of the next generation of coronagraphic instruments for high contrast imaging of exoplanets.We propose here a new closed-loop optimization technique to use the deformable mirrors to correct for the effects of complex apertures on coronagraph performance. This method is a new alternative to the ACAD technique previously developed by our group. This technique allows the use of any coronagraph designed for continuous apertures, with complex, segmented, apertures, maintaining high performance in contrast and throughput. Finally, this closed loop technique allows flexibility to adapt for changing pupil geometries (e.g. in case of segment failure or maintenance for ground-based telescopes), or "manufacturing imperfections in the coronagraph assembly and alignment.We present a numerical study on several pupil geometries (segmented LUVOIR type aperture, WFIRST, ELTs) for which we obtained high contrast levels with several deformable mirror setups (size, number of actuators, separation between them), coronagraphs (apodized pupil lyot and vortex coronagraphs) and spectral bandwidths. Finally, using the results of this study, we will present recommendations for future coronagraphic instruments.

  3. Improving performance of DS-CDMA systems using chaotic complex Bernoulli spreading codes

    Science.gov (United States)

    Farzan Sabahi, Mohammad; Dehghanfard, Ali

    2014-12-01

    The most important goal of spreading spectrum communication system is to protect communication signals against interference and exploitation of information by unintended listeners. In fact, low probability of detection and low probability of intercept are two important parameters to increase the performance of the system. In Direct Sequence Code Division Multiple Access (DS-CDMA) systems, these properties are achieved by multiplying the data information in spreading sequences. Chaotic sequences, with their particular properties, have numerous applications in constructing spreading codes. Using one-dimensional Bernoulli chaotic sequence as spreading code is proposed in literature previously. The main feature of this sequence is its negative auto-correlation at lag of 1, which with proper design, leads to increase in efficiency of the communication system based on these codes. On the other hand, employing the complex chaotic sequences as spreading sequence also has been discussed in several papers. In this paper, use of two-dimensional Bernoulli chaotic sequences is proposed as spreading codes. The performance of a multi-user synchronous and asynchronous DS-CDMA system will be evaluated by applying these sequences under Additive White Gaussian Noise (AWGN) and fading channel. Simulation results indicate improvement of the performance in comparison with conventional spreading codes like Gold codes as well as similar complex chaotic spreading sequences. Similar to one-dimensional Bernoulli chaotic sequences, the proposed sequences also have negative auto-correlation. Besides, construction of complex sequences with lower average cross-correlation is possible with the proposed method.

  4. Role of natural analogs in performance assessment of nuclear waste repositories

    Energy Technology Data Exchange (ETDEWEB)

    Sagar, B.; Wittmeyer, G.W. [Center for Nuclear Waste Regulatory Analysis, San Antonio, TX (United States)

    1995-09-01

    Mathematical models of the flow of water and transport of radionuclides in porous media will be used to assess the ability of deep geologic repositories to safely contain nuclear waste. These models must, in some sense, be validated to ensure that they adequately describe the physical processes occurring within the repository and its geologic setting. Inasmuch as the spatial and temporal scales over which these models must be applied in performance assessment are very large, validation of these models against laboratory and small-scale field experiments may be considered inadequate. Natural analogs may provide validation data that are representative of physico-chemical processes that occur over spatial and temporal scales as large or larger than those relevant to repository design. The authors discuss the manner in which natural analog data may be used to increase confidence in performance assessment models and conclude that, while these data may be suitable for testing the basic laws governing flow and transport, there is insufficient control of boundary and initial conditions and forcing functions to permit quantitative validation of complex, spatially distributed flow and transport models. The authors also express their opinion that, for collecting adequate data from natural analogs, resources will have to be devoted to them that are much larger than are devoted to them at present.

  5. Procedure for assessing the performance of a rockfall fragmentation model

    Science.gov (United States)

    Matas, Gerard; Lantada, Nieves; Corominas, Jordi; Gili, Josep Antoni; Ruiz-Carulla, Roger; Prades, Albert

    2017-04-01

    A Rockfall is a mass instability process frequently observed in road cuts, open pit mines and quarries, steep slopes and cliffs. It is frequently observed that the detached rock mass becomes fragmented when it impacts with the slope surface. The consideration of the fragmentation of the rockfall mass is critical for the calculation of block's trajectories and their impact energies, to further assess their potential to cause damage and design adequate preventive structures. We present here the performance of the RockGIS model. It is a GIS-Based tool that simulates stochastically the fragmentation of the rockfalls, based on a lumped mass approach. In RockGIS, the fragmentation initiates by the disaggregation of the detached rock mass through the pre-existing discontinuities just before the impact with the ground. An energy threshold is defined in order to determine whether the impacting blocks break or not. The distribution of the initial mass between a set of newly generated rock fragments is carried out stochastically following a power law. The trajectories of the new rock fragments are distributed within a cone. The model requires the calibration of both the runout of the resultant blocks and the spatial distribution of the volumes of fragments generated by breakage during their propagation. As this is a coupled process which is controlled by several parameters, a set of performance criteria to be met by the simulation have been defined. The criteria includes: position of the centre of gravity of the whole block distribution, histogram of the runout of the blocks, extent and boundaries of the young debris cover over the slope surface, lateral dispersion of trajectories, total number of blocks generated after fragmentation, volume distribution of the generated fragments, the number of blocks and volume passages past a reference line and the maximum runout distance Since the number of parameters to fit increases significantly when considering fragmentation, the

  6. Literature Review and Assessment of Plant and Animal Transfer Factors Used in Performance Assessment Modeling

    Energy Technology Data Exchange (ETDEWEB)

    Robertson, David E.; Cataldo, Dominic A.; Napier, Bruce A.; Krupka, Kenneth M.; Sasser, Lyle B.

    2003-07-20

    A literature review and assessment was conducted by Pacific Northwest National Laboratory (PNNL) to update information on plant and animal radionuclide transfer factors used in performance-assessment modeling. A group of 15 radionuclides was included in this review and assessment. The review is composed of four main sections, not including the Introduction. Section 2.0 provides a review of the critically important issue of physicochemical speciation and geochemistry of the radionuclides in natural soil-water systems as it relates to the bioavailability of the radionuclides. Section 3.0 provides an updated review of the parameters of importance in the uptake of radionuclides by plants, including root uptake via the soil-groundwater system and foliar uptake due to overhead irrigation. Section 3.0 also provides a compilation of concentration ratios (CRs) for soil-to-plant uptake for the 15 selected radionuclides. Section 4.0 provides an updated review on radionuclide uptake data for animal products related to absorption, homeostatic control, approach to equilibration, chemical and physical form, diet, and age. Compiled transfer coefficients are provided for cow’s milk, sheep’s milk, goat’s milk, beef, goat meat, pork, poultry, and eggs. Section 5.0 discusses the use of transfer coefficients in soil, plant, and animal modeling using regulatory models for evaluating radioactive waste disposal or decommissioned sites. Each section makes specific suggestions for future research in its area.

  7. Feed Variability and Bulk Vitrification Glass Performance Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Mahoney, Lenna A.; Vienna, John D.

    2005-01-10

    The supplemental treatment (ST) bulk vitrification process will obtain its feed, consisting of low-activity waste (LAW), from more than one source. One purpose of this letter report is to describe the compositional variability of the feed to ST. The other is to support the M-62-08 decision by providing a preliminary assessment of the effectiveness of bulk vitrification (BV), the process that has been selected to perform supplemental treatment, in handling the ST feed envelope. Roughly nine-tenths of the ST LAW feed will come from the Waste Treatment Plant (WTP) pretreatment. This processed waste is expected to combine (1) a portion of the same LAW feed sent to the WTP melters and (2) a dilute stream that is the product of the condensate from the submerged-bed scrubber (SBS) and the drainage from the electrostatic precipitator (WESP), both of which are part of the LAW off-gas system. The manner in which the off-gas-product stream is concentrated to reduce its volume, and the way in which the excess LAW and off-gas product streams are combined, are part of the interface between WTP and ST and have not been determined. This letter report considers only one possible arrangement, in which half of the total LAW is added to the off-gas product stream, giving an estimated ST feed stream from WTP. (Total LAW equals that portion of LAW sent to the WTP LAW vitrification plant (WTP LAW) plus the LAW not currently treatable in the LAW vitrification plant due to capacity limitations (excess)).

  8. Solubility measurement of trivalent lanthanide for performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Shibutani, Sanae [Power Reactor and Nuclear Fuel Development Corp., Tokai, Ibaraki (Japan). Tokai Works

    1996-03-01

    The solubility is estimated using thermodynamic data for performance assessment of the geological disposal system for high level radioactive waste. To calculate reliable solubility, the development of thermodynamic database is needed. We obtained the hydrolysis constants of Sm(OH){sub 3}(cr), SmOHCO{sub 3}(cr) and NdOHCO{sub 3}(cr) by solubility measurements. The solubility measurements of Sm(OH){sub 3}(cr) were conducted under low CO{sub 2} concentration system(Ar>99.999%), 24-27degC, ionic strength I=0.1, pH7-12.1. For hydroxo-carbonates were conducted in air, 25 {+-} 0.5degC, ionic strength I=0.1, pH5.7-9.7. The solubilities were similar to those of americium. The results were Sm(OH){sub 3}(cr) {r_reversible} Sm{sup 3+} + 3H{sub 2}O - 3H{sup +}; logK = 66.4, SmOHCO{sub 3}(cr) {r_reversible} Sm{sup 3+} + H{sub 2}O - H{sup +} + CO{sub 3}{sup 2-}; logK = -8.69, NdOHCO{sub 3}(cr) {r_reversible} Nd{sup 3+} + H{sub 2}O - H{sup +} + CO{sub 3}{sup 2-}; logK = -7.89. The solubilities of samarium and neodymium under the geological disposal condition were estimated at 10{sup -6}-10{sup -8} mol/l. (author).

  9. An ecological momentary assessment investigation of complex and conflicting emotions in youth with borderline personality disorder.

    Science.gov (United States)

    Andrewes, Holly E; Hulbert, Carol; Cotton, Susan M; Betts, Jennifer; Chanen, Andrew M

    2017-02-27

    Non-suicidal self-injury (NSSI) is a prevalent behaviour among people with borderline personality disorder (BPD) but many aspects of the emotional changes that trigger and maintain this behaviour are unknown. This study examines the relationships between NSSI and the number of negative ('negative complex') and opposing valence ('conflicting') emotions. One hundred and seven youth (aged 15-25 years) with first-presentation BPD were assessed using a combination of self-report and ecological momentary assessment to investigate trait levels of emotional acceptance and in vivo changes in the number of negative complex and conflicting emotions before and after self-injurious thoughts and behaviours. Multilevel modelling revealed that changes in the number of negative complex emotions mirrored distress levels before and after self-injurious thoughts and behaviours, approximating a quadratic curve. Increases in the number of negative complex emotions reported prior to self-injurious thoughts and behaviours were associated with lower acceptance of negative emotions. These findings indicate that the number of negative emotions experienced contributes to distress prior to engagement in NSSI. The relationship between non-acceptance of negative emotions and negative complex emotions prior to NSSI suggests that improved emotional awareness and acceptance should be a focus for early interventions aimed at reducing self-injury.

  10. Bimanual Psychomotor Performance in Neurosurgical Resident Applicants Assessed Using NeuroTouch, a Virtual Reality Simulator.

    Science.gov (United States)

    Winkler-Schwartz, Alexander; Bajunaid, Khalid; Mullah, Muhammad A S; Marwa, Ibrahim; Alotaibi, Fahad E; Fares, Jawad; Baggiani, Marta; Azarnoush, Hamed; Zharni, Gmaan Al; Christie, Sommer; Sabbagh, Abdulrahman J; Werthner, Penny; Del Maestro, Rolando F

    Current selection methods for neurosurgical residents fail to include objective measurements of bimanual psychomotor performance. Advancements in computer-based simulation provide opportunities to assess cognitive and psychomotor skills in surgically naive populations during complex simulated neurosurgical tasks in risk-free environments. This pilot study was designed to answer 3 questions: (1) What are the differences in bimanual psychomotor performance among neurosurgical residency applicants using NeuroTouch? (2) Are there exceptionally skilled medical students in the applicant cohort? and (3) Is there an influence of previous surgical exposure on surgical performance? Participants were instructed to remove 3 simulated brain tumors with identical visual appearance, stiffness, and random bleeding points. Validated tier 1, tier 2, and advanced tier 2 metrics were used to assess bimanual psychomotor performance. Demographic data included weeks of neurosurgical elective and prior operative exposure. This pilot study was carried out at the McGill Neurosurgical Simulation Research and Training Center immediately following neurosurgical residency interviews at McGill University, Montreal, Canada. All 17 medical students interviewed were asked to participate, of which 16 agreed. Performances were clustered in definable top, middle, and bottom groups with significant differences for all metrics. Increased time spent playing music, increased applicant self-evaluated technical skills, high self-ratings of confidence, and increased skin closures statistically influenced performance on univariate analysis. A trend for both self-rated increased operating room confidence and increased weeks of neurosurgical exposure to increased blood loss was seen in multivariate analysis. Simulation technology identifies neurosurgical residency applicants with differing levels of technical ability. These results provide information for studies being developed for longitudinal studies on the

  11. Complex

    African Journals Online (AJOL)

    CLEMENT O BEWAJI

    Schiff bases and their complex compounds have been studied for their .... establishing coordination of the N–(2 – hydroxybenzyl) - L - α - valine Schiff base ..... (1967); “Spectrophotometric Identification of Organic Compounds”, Willey, New.

  12. Assessing multiscale complexity of short heart rate variability series through a model-based linear approach

    Science.gov (United States)

    Porta, Alberto; Bari, Vlasta; Ranuzzi, Giovanni; De Maria, Beatrice; Baselli, Giuseppe

    2017-09-01

    We propose a multiscale complexity (MSC) method assessing irregularity in assigned frequency bands and being appropriate for analyzing the short time series. It is grounded on the identification of the coefficients of an autoregressive model, on the computation of the mean position of the poles generating the components of the power spectral density in an assigned frequency band, and on the assessment of its distance from the unit circle in the complex plane. The MSC method was tested on simulations and applied to the short heart period (HP) variability series recorded during graded head-up tilt in 17 subjects (age from 21 to 54 years, median = 28 years, 7 females) and during paced breathing protocols in 19 subjects (age from 27 to 35 years, median = 31 years, 11 females) to assess the contribution of time scales typical of the cardiac autonomic control, namely in low frequency (LF, from 0.04 to 0.15 Hz) and high frequency (HF, from 0.15 to 0.5 Hz) bands to the complexity of the cardiac regulation. The proposed MSC technique was compared to a traditional model-free multiscale method grounded on information theory, i.e., multiscale entropy (MSE). The approach suggests that the reduction of HP variability complexity observed during graded head-up tilt is due to a regularization of the HP fluctuations in LF band via a possible intervention of sympathetic control and the decrement of HP variability complexity observed during slow breathing is the result of the regularization of the HP variations in both LF and HF bands, thus implying the action of physiological mechanisms working at time scales even different from that of respiration. MSE did not distinguish experimental conditions at time scales larger than 1. Over a short time series MSC allows a more insightful association between cardiac control complexity and physiological mechanisms modulating cardiac rhythm compared to a more traditional tool such as MSE.

  13. Peak picking and the assessment of separation performance in two-dimensional high performance liquid chromatography

    Energy Technology Data Exchange (ETDEWEB)

    Guiochon, Georges A [ORNL; Shalliker, R. Andrew [University of Western Sydney, Australia

    2010-01-01

    An algorithm was developed for 2DHPLC that automated the process of peak recognition, measuring their retention times, and then subsequently plotting the information in a two-dimensional retention plane. Following the recognition of peaks, the software then performed a series of statistical assessments of the separation performance, measuring for example, correlation between dimensions, peak capacity and the percentage of usage of the separation space. Peak recognition was achieved by interpreting the first and second derivatives of each respective one-dimensional chromatogram to determine the 1D retention times of each solute and then compiling these retention times for each respective fraction 'cut'. Due to the nature of comprehensive 2DHPLC adjacent cut fractions may contain peaks common to more than one cut fraction. The algorithm determined which components were common in adjacent cuts and subsequently calculated the peak maximum profile by interpolating the space between adjacent peaks. This algorithm was applied to the analysis of a two-dimensional separation of an apple flesh extract separated in a first dimension comprising a cyano stationary phase and an aqueous/THF mobile phase as the first dimension and a second dimension comprising C18-Hydro with an aqueous/MeOH mobile phase. A total of 187 peaks were detected.

  14. Teaching and Assessing Complex Skills in Simulation With Application to Rifle Marksmanship Training

    Science.gov (United States)

    2009-12-01

    individual performance skills that require complex perceptual motor activity. Examples include certain sports , such as golf and tennis and as studied here...distractions, and a shift from dependence upon external cues to internal ( proprioceptive ) stimuli as a means to guide coordinated task performance (Fitts...and for professional sports like baseball, tennis and golf, the skill is composed of tasks that can be taught individually because there are consistent

  15. Performance Analysis of a Hardware Implemented Complex Signal Kurtosis Radio-Frequency Interference Detector

    Science.gov (United States)

    Schoenwald, Adam J.; Bradley, Damon C.; Mohammed, Priscilla N.; Piepmeier, Jeffrey R.; Wong, Mark

    2016-01-01

    Radio-frequency interference (RFI) is a known problem for passive remote sensing as evidenced in the L-band radiometers SMOS, Aquarius and more recently, SMAP. Various algorithms have been developed and implemented on SMAP to improve science measurements. This was achieved by the use of a digital microwave radiometer. RFI mitigation becomes more challenging for microwave radiometers operating at higher frequencies in shared allocations. At higher frequencies larger bandwidths are also desirable for lower measurement noise further adding to processing challenges. This work focuses on finding improved RFI mitigation techniques that will be effective at additional frequencies and at higher bandwidths. To aid the development and testing of applicable detection and mitigation techniques, a wide-band RFI algorithm testing environment has been developed using the Reconfigurable Open Architecture Computing Hardware System (ROACH) built by the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER) Group. The testing environment also consists of various test equipment used to reproduce typical signals that a radiometer may see including those with and without RFI. The testing environment permits quick evaluations of RFI mitigation algorithms as well as show that they are implementable in hardware. The algorithm implemented is a complex signal kurtosis detector which was modeled and simulated. The complex signal kurtosis detector showed improved performance over the real kurtosis detector under certain conditions. The real kurtosis is implemented on SMAP at 24 MHz bandwidth. The complex signal kurtosis algorithm was then implemented in hardware at 200 MHz bandwidth using the ROACH. In this work, performance of the complex signal kurtosis and the real signal kurtosis are compared. Performance evaluations and comparisons in both simulation as well as experimental hardware implementations were done with the use of receiver operating characteristic (ROC

  16. Linking Supply Chain Network Complexity to Interdependence and Risk-Assessment: Scale Development and Empirical Investigation

    Directory of Open Access Journals (Sweden)

    Samyadip Chakraborty

    2015-12-01

    Full Text Available Concepts like supply chain network complexity, interdependence and risk assessment have been prominently discussed directly and indirectly in management literature over past decades and plenty of frameworks and conceptual prescriptive research works have been published contributing towards building the body of knowledge. However previous studies often lacked quantification of the findings. Consequently, the need for suitable scales becomes prominent for measuring those constructs to empirically support the conceptualized relationships. This paper expands the understanding of supply chain network complexity (SCNC and also highlights its implications on interdependence (ID between the actors and risk assessment (RAS in transaction relationships. In doing so, SCNC and RAS are operationalized to understand how SCNC affects interdependence and risk assessment between the actors in the supply chain network. The contribution of this study lies in developing and validating multi-item scales for these constructs and empirically establishing the hypothesized relationships in the Indian context based on firm data collected using survey–based questionnaire. The methodology followed included structural equation modeling. The study findings indicate that SCNC had significant relationship with interdependence, which in turn significantly affected risk assessment. This study carries both academic and managerial implications and provides an empirically supported framework linking network complexity with the two key variables (ID and RAS, playing crucial roles in managerial decision making. This study contributes to the body of knowledge and aims at guiding managers in better understanding transaction relationships.

  17. Ecological assessment of heart rate complexity: Differences between high- and low-anxious adolescents.

    Science.gov (United States)

    Bornas, Xavier; Balle, Maria; De la Torre-Luque, Alejandro; Fiol-Veny, Aina; Llabrés, Jordi

    2015-10-01

    Nonlinear measures can capture the complex structure of the heart beating, and recordings taken while the individual performs daily activities may help to understand the cardiac system's output in natural conditions. As healthy systems are characterized by having highly complex outputs, we hypothesized that the cardiac output from high anxious adolescents should be less complex than the output from their low anxious counterparts. In this study ECG was recorded for two hours in 50 adolescents while they performed regular school activities. Fractal dimension (FD), scaling exponents and multiscale entropy were calculated on the interbeat intervals time series. Both FD and entropy were significantly lower in the high-anxious group than the low-anxious group. These results suggest different heart-related regulation in adolescents who suffered from high anxious symptomatology.

  18. Panel discussion on near-field coupled processes with emphasis on performance assessment

    Energy Technology Data Exchange (ETDEWEB)

    Codell, R.B.; Baca, R.G.; Ahola, M.P. [and others

    1996-04-01

    The presentations in this panel discussion involve the general topic of near-field coupled processes and postclosure performance assessment with an emphasis on rock mechanics. The potential impact of near-field rock mass deformation on repository performance was discussed, as well as topics including long term excavation deterioration, the performance of geologic seals, and coupled processes concerning rock mechanics in performance assessments.

  19. Assessing Complexity in Learning Outcomes--A Comparison between the SOLO Taxonomy and the Model of Hierarchical Complexity

    Science.gov (United States)

    Stålne, Kristian; Kjellström, Sofia; Utriainen, Jukka

    2016-01-01

    An important aspect of higher education is to educate students who can manage complex relationships and solve complex problems. Teachers need to be able to evaluate course content with regard to complexity, as well as evaluate students' ability to assimilate complex content and express it in the form of a learning outcome. One model for evaluating…

  20. Assessing the Performance of the Army Reserve Components School System.

    Science.gov (United States)

    Winkler, John D.; And Others

    The operation of the U.S. Army's Reserve Components (RC) school system was assessed. Three areas were identified that were fundamental to the system where organizational changes could make a difference. First, the project assessed training requirements and school delivery of courses. In serving a sizable training requirement for reclassification…